Air curtain machine and cold store system

Abstract

The application discloses a kind of air curtain machine and cold storage system, it is related to cold storage system technical field, solve the technical problem of large energy consumption in prior art air curtain machine needs to be continuously full load to open.The air curtain machine of the application, including air curtain machine main body, air curtain machine main body is installed on door body, air curtain machine main body is used to air supply and forms air curtain, and air curtain machine main body has multiple groups of fan section, based on the opening width of door body, the width of air curtain is adjusted by the opening number of fan section.The air curtain machine of the application, when door body is all opened, can open all fan sections of air curtain machine main body, to form air curtain at the opened door body, block the cold loss in cold store;When door body is partially opened, part of fan section of air curtain machine main body can be opened, while blocking the cold loss in cold store, can reduce the energy consumption of air curtain machine main body.

Description

Technical Field

[0001] This invention relates to the field of cold storage system technology, and more particularly to an air curtain machine and a cold storage system including the air curtain machine. Background Technology

[0002] Air curtains are widely used to effectively reduce heat transfer when cold storage facilities are opened. An air curtain is formed by an air curtain machine, which consists of a fan and a housing with supply and return air inlets, delivering air vertically. Currently, most air curtain machines used for cold storage insulation are installed based on the length of the storage door. When goods are being moved, the door is opened, and the air curtain machine must operate continuously and promptly to block heat transfer between the inside and outside of the cold storage. However, existing air curtain machines cannot effectively adjust the air curtain size according to the required door opening space in the actual handling scenario, thus making it impossible to effectively control the energy consumption of the air curtain machine.

[0003] Specifically, when the airflow of an air curtain is sufficient, it can effectively block heat transfer between the inside and outside of the cold storage, but its energy consumption is also relatively high. On the other hand, when the airflow of the air curtain is insufficient, a large amount of cold air will be lost from the cold storage, especially near the door. The reason for this is that the air curtain cannot adjust its air curtain parameters according to the opening space of the door. In order to reduce the loss of cold air in the cold storage when the door is open, keeping the air curtain running at full load becomes the only option.

[0004] To reduce the operating costs of cold storage facilities, especially those that require frequent opening, how to minimize the energy consumption of air curtain machines while ensuring minimal loss of cold storage capacity when opening the cold storage doors has become a pressing technical problem for those skilled in the art. Summary of the Invention

[0005] One objective of this invention is to provide an air curtain machine that solves the technical problem of high energy consumption in existing air curtain machines, which require continuous full-load operation. The numerous technical effects of the preferred embodiment of this invention are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The air curtain machine of the present invention includes an air curtain machine body, which is installed on a door. The air curtain machine body is used to supply air and form an air curtain. The air curtain machine body has multiple fan sections. The width of the air curtain is adjusted by the number of fan sections that are opened, based on the opening width of the door.

[0008] According to a preferred embodiment, the fan sections are symmetrically arranged on both sides of the central seam of the door. Based on the opening width of the door, the fan sections in the open state are symmetrically located on both sides of the central seam of the door, and the air supply width of the air curtain is not less than the opening width of the door.

[0009] According to a preferred embodiment, the fan section includes a motor and a fan blade assembly, wherein the number of the motor and the number of the fan blade assembly are both even, and the number of the motor is equivalent to the number of the fan blade assembly.

[0010] According to a preferred embodiment, the air curtain machine further includes a guide rail, on which the air curtain machine body is slidably mounted. Based on the opening height of the door, the height of the air curtain is adjusted by the height of the air curtain machine body from the ground, and the rotational speed of the motor is related to the height of the air curtain machine body from the ground.

[0011] According to a preferred embodiment, the height of the air curtain machine body above the ground decreases as the door opening height decreases, and the speed of the motor decreases as the height of the air curtain machine body above the ground decreases; conversely, the height of the air curtain machine body above the ground increases as the door opening height increases, and the speed of the motor increases as the height of the air curtain machine body above the ground increases.

[0012] According to a preferred embodiment, the air curtain machine further includes a heat-insulating roller shutter, which is disposed on the door body. The heat-insulating roller shutter has an unfolded state and a retracted state, and the unfolded height of the heat-insulating roller shutter is related to the height of the air curtain machine body from the ground.

[0013] According to a preferred embodiment, the unfolded height of the heat-insulating roller shutter and the height of the air curtain machine body from the ground satisfy the following relationship: H1 + H2 = H, where H is the height of the door body, H1 is the unfolded height of the heat-insulating roller shutter, and H2 is the height of the air curtain machine body from the ground.

[0014] According to a preferred embodiment, the air curtain machine body further includes a first return air inlet, a second return air inlet, and a double-sided return air guide surface. The double-sided return air guide surface is disposed inside the housing and has two guide surfaces. The first return air inlet faces outward from the cold storage and allows air from outside the cold storage to enter the housing through the first return air inlet and one side of the double-sided return air guide surface. The second return air inlet faces inward from the cold storage and allows air from inside the cold storage to enter the housing through the second return air inlet and the other side of the double-sided return air guide surface.

[0015] According to a preferred embodiment, the return air areas of the first return air inlet and the second return air inlet are equivalent, and the return air of the main body of the air curtain machine is composed of 1 / 2 outside air and 1 / 2 inside air.

[0016] According to a preferred embodiment, the air curtain machine body further includes an air guide plate, which is rotatably mounted on the housing, and the angle of the air guide plate is related to the difference between the outside temperature of the cold storage and the preset temperature.

[0017] According to a preferred embodiment, the angle of the air guide plate satisfies: C = 15 + 0.2(T1 - T2), where C is the angle of the air guide plate, T1 is the real-time temperature outside the cold storage, and T2 is the preset temperature outside the cold storage.

[0018] According to a preferred embodiment, the air curtain machine further includes a frost-proof baffle, which is located at the top of the door and on both sides of the air curtain machine body, and forms a receiving cavity between the frost-proof baffle and the heat-insulating roller shutter. When the door is closed, the air curtain machine body is located in the receiving cavity.

[0019] According to a preferred embodiment, the air curtain machine further includes a heat insulation baffle located outside the cold storage and at the top of the door. When the door is closed, the heat insulation baffle is used to block heat transfer between the inside and outside of the cold storage.

[0020] The air curtain machine provided by this invention has at least the following beneficial technical effects:

[0021] The air curtain machine of the present invention includes an air curtain machine body, which is installed on a door. The air curtain machine body is used to supply air and form an air curtain. The air curtain machine body has multiple sets of fan sections. Based on the opening width of the door, the width of the air curtain is adjusted by the number of fan sections that are open. Specifically, when the door is fully open, all fan sections of the air curtain machine body can be opened to form an air curtain at the opened door, blocking the loss of cold air in the cold storage. When the door is partially open, only some fan sections of the air curtain machine body can be opened, which, while blocking the loss of cold air in the cold storage, also reduces the energy consumption of the air curtain machine body. In other words, the air curtain machine of the present invention solves the technical problem of existing air curtain machines requiring continuous full-load operation and high energy consumption by controlling the number of fan sections that are open based on the opening width of the door.

[0022] Furthermore, the preferred technical solution of the present invention also has the following beneficial technical effects:

[0023] The preferred embodiment of this invention also includes a guide rail, on which the air curtain machine body is slidably mounted. Based on the door's opening height, the height of the air curtain is adjusted by the height of the air curtain machine body above the ground. Furthermore, the motor's rotational speed is related to this height. Specifically, as the door's opening height decreases, the air curtain machine body's height above the ground decreases, and the motor's rotational speed decreases; conversely, as the door's opening height increases, the air curtain machine body's height above the ground increases, and the motor's rotational speed increases. Therefore, the preferred embodiment of this invention, when the door's opening height is reduced, lowers the air curtain machine body's height above the ground, thus reducing the motor's rotational speed. This allows the air curtain machine to effectively block cold air loss within the cold storage while further reducing the energy consumption of the air curtain machine body.

[0024] The preferred embodiment of the present invention is an air curtain machine with two return air vents, which are used to allow air from outside the cold storage and air from inside the cold storage to enter the shell respectively. This makes the return air of the air curtain machine a mixture of air from inside and outside the cold storage, thereby reducing the temperature gradient between the air curtain and the inside of the cold storage, reducing the cold loss caused by the excessive temperature gradient, reducing the temperature fluctuation in the door area of ​​the cold storage, ensuring the storage temperature in that area, and improving the storage quality.

[0025] The preferred embodiment of the present invention is an air curtain machine in which the air guide plate is rotatably mounted on the housing, and the angle of the air guide plate is adjusted based on the difference between the outside temperature of the cold storage and the preset temperature, thereby realizing the adjustment of the air supply angle and preventing the cold storage from losing cold energy due to thermal pressure caused by temperature difference.

[0026] Another objective of this invention is to provide a cold storage system.

[0027] The cold storage system of the present invention includes a refrigeration mechanism, a door, and an air curtain machine, wherein the door is a sliding door, and the air curtain machine is the air curtain machine described in any of the technical solutions of the present invention.

[0028] The cold storage system provided by this invention has at least the following beneficial technical effects:

[0029] The cold storage system of the present invention includes a refrigeration mechanism, a door, and an air curtain machine. The door is a sliding door, and the air curtain machine is any of the air curtain machines described in the present invention. Since the cold storage system has an air curtain machine described in the present invention, the cold storage system can control the number of fan sections of the air curtain machine body to be opened based on the opening width of the door, which helps to reduce the energy consumption of the air curtain machine body, thereby reducing the energy consumption of the cold storage system of the present invention. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of a preferred embodiment of the air curtain machine of the present invention;

[0032] Figure 2 This is a first schematic diagram of the air curtain machine of the present invention in its initial state;

[0033] Figure 3 This is a second schematic diagram of the air curtain machine of the present invention in its initial state;

[0034] Figure 4 This is a first schematic diagram of the air curtain machine of the present invention adjusted to a certain state;

[0035] Figure 5 This is a second schematic diagram of the air curtain machine of the present invention adjusted to a certain state;

[0036] Figure 6 This is a partial first schematic diagram of a preferred embodiment of the air curtain machine body of the present invention;

[0037] Figure 7 This is a partial second schematic diagram of a preferred embodiment of the air curtain machine body of the present invention.

[0038] In the diagram: 1. Main body of the air curtain machine; 101. Motor; 102. Fan blade assembly; 103. First return air inlet; 104. Second return air inlet; 105. Double-sided return air guide surface; 106. Shell; 107. Air guide plate; 108. Air outlet; 2. Door; 3. Guide rail; 4. Insulated roller shutter; 5. Anti-frost baffle; 6. Insulated baffle; 7. Cold storage door guide rail. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0040] The following is in conjunction with the instruction manual appendix. Figures 1-7 The air curtain machine and cold storage system of the present invention will be described in detail in Examples 1 and 2.

[0041] Example 1

[0042] This embodiment provides a detailed description of the air curtain machine of the present invention.

[0043] The air curtain machine in this embodiment includes an air curtain machine body 1, which is installed on the door 2. The air curtain machine body 1 is used to supply air and form an air curtain, such as... Figure 1 As shown. Preferably, the air curtain machine body 1 has multiple fan sections. Based on the opening width of the door 2, the width of the air curtain is adjusted by the number of fan sections that are open, such as... Figure 1 As shown. Specifically, if the maximum opening width of door 2 is set to L m, then the maximum width of the air curtain is also L m. Based on the opening width of door 2, the width of the air curtain can be adjusted within the range of 0 to L m. For example... Figure 1 As shown, the main body 1 of the air curtain machine is equipped with 10 sets of fan sections.

[0044] In this embodiment, when the door 2 is fully open, all the fan sections of the air curtain machine body 1 can be fully opened to form an air curtain at the opened door 2, blocking the loss of cold air inside the cold storage. When the door 2 is partially open, only part of the fan sections of the air curtain machine body 1 can be opened, which, while blocking the loss of cold air inside the cold storage, also reduces the energy consumption of the air curtain machine body 1. That is, the air curtain machine of this embodiment solves the technical problem of high energy consumption in the prior art, which requires the air curtain machine to be continuously fully loaded and operates based on the opening width of the door 2 by controlling the number of fan sections that are opened.

[0045] According to a preferred embodiment, fan sections are symmetrically arranged on both sides of the central seam of the door 2. Based on the opening width of the door 2, the fan sections in the open state are symmetrically located on both sides of the central seam of the door 2, ensuring that the air curtain's air supply width is not less than the opening width of the door 2. Preferably, when the number of fan sections is even, the number of fan sections on both sides of the central seam of the door 2 is equal; when the number of fan sections is odd, the middle fan section is symmetrically arranged on both sides of the central seam of the door 2, and the remaining fan sections are evenly distributed on both sides of this middle fan section. In this preferred embodiment, the air curtain machine, based on the opening width of the door 2, has fan sections in the open state symmetrically located on both sides of the central seam of the door 2. Specifically, the door 2 can be pushed open synchronously from the middle to both sides, and correspondingly, the opening sequence of the fan sections is synchronously opened from the middle to both sides, so that the fan sections in the open state are symmetrically located on both sides of the central seam of the door 2. Figure 1 As shown, the air curtain machine body 1 has 6 fan sections when opened, and 2 fan sections on each side are not open. The preferred technology in this embodiment is based on the opening width of the door 2, with the fan sections in the open state symmetrically located on both sides of the central seam of the door 2. This can avoid vibration caused by uneven distribution of fan sections in the open state in the air curtain machine body 1, and thus avoid loosening of the air curtain machine body 1 due to long-term vibration.

[0046] According to a preferred embodiment, the fan section includes a motor 101 and a fan blade assembly 102, wherein the number of motors 101 and the number of fan blade assemblies 102 are both even, and the number of motors 101 is equivalent to the number of fan blade assemblies 102. Figure 6A schematic diagram of a preferred embodiment of the fan section is shown. Preferably, the air speed is adjusted by changing the rotational speed of the motor 101 to improve the isolation effect. More preferably, the air supply speed is not less than 8 m / s, thereby effectively reducing the dissipation of cold energy in the cold storage. Preferably, the motor 101 and the fan blade assembly 102 are located inside the housing 106. More preferably, both the housing 106 and the fan blade assembly 102 are made of V0 fire-resistant ABS engineering plastic. In this preferred embodiment, the number of motors 101 and fan blade assemblies 102 is even, and the number of motors 101 is roughly equal to the number of fan blade assemblies 102. This allows one motor 101 to support one set of fan blade assemblies 102. Even if one motor 101 fails, the remaining motors 101 can increase their rotational speed to supplement the air volume, achieving mutual backup.

[0047] According to a preferred embodiment, the air curtain machine further includes a guide rail 3, and the air curtain machine body 1 is slidably mounted on the guide rail 3, such as... Figure 1 As shown. Preferably, based on the opening height of the door 2, the height of the air curtain is adjusted by the height of the air curtain machine body 1 from the ground, and the rotational speed of the motor 101 is related to the height of the air curtain machine body 1 from the ground. More preferably, the height of the air curtain machine body 1 from the ground decreases as the opening height of the door 2 decreases, and the rotational speed of the motor 101 decreases as the height of the air curtain machine body 1 from the ground decreases; conversely, the height of the air curtain machine body 1 from the ground increases as the opening height of the door 2 increases, and the rotational speed of the motor 101 increases as the height of the air curtain machine body 1 from the ground increases. In this preferred embodiment, the air curtain machine body 1 is slidably mounted on the guide rail 3, thereby adjusting the height of the air curtain machine body 1 from the ground by sliding it on the guide rail 3. Furthermore, in this preferred embodiment, when the opening height of the door 2 decreases, the height of the air curtain machine body 1 from the ground can be reduced, and the rotational speed of the motor 101 can be reduced, thereby enabling the air curtain machine to further reduce the energy consumption of the air curtain machine body while blocking the loss of cold air in the cold storage.

[0048] According to a preferred embodiment, the air curtain machine further includes an insulated roller shutter 4, which is disposed on the door 2. The insulated roller shutter 4 has an unfolded state and a retracted state, and the unfolded height of the insulated roller shutter 4 is related to the height of the air curtain machine body 1 from the ground. Figure 1As shown. Preferably, the unfolded height of the heat-insulating roller shutter 4 and the height of the air curtain machine body 1 from the ground satisfy the following relationship: H1 + H2 = H, where H is the height of the door 2, H1 is the unfolded height of the heat-insulating roller shutter 4, and H2 is the height of the air curtain machine body 1 from the ground. The height H2 of the air curtain machine body 1 from the ground can refer to the height of the highest point of the air curtain machine body 1 from the ground, the height of the lowest point of the air curtain machine body 1 from the ground, or the height of the center of the air curtain machine body 1 from the ground. The lowest point of the guide rail 3 is at a certain height from the ground, for example, 2m from the ground, to ensure the normal transport requirements of the air curtain machine body 1. Preferably, the maximum height of the door 2 is set to Hm, and the guide rail 3 is located in the height range of 2m to Hm, so the height of the air curtain can be adjusted within the range of 2m to Hm, and correspondingly, the unfolded height of the heat-insulating roller shutter 4 can be adjusted within the range of 0 to (Hm - 2m). Figure 2 and Figure 3 This diagram shows the air curtain machine body 1 in its initial state. Figure 4 and Figure 5 A schematic diagram is shown when the air curtain machine body 1 is lowered to a certain height. The preferred embodiment of the air curtain machine also includes a heat-insulating roller shutter 4. When the air curtain machine body 1 slides on the guide rail 3 to adjust the height of the air curtain machine body 1 from the ground, the heat-insulating roller shutter 4 is simultaneously adjusted to an unfolded state and a tightened state, so as to block the heat transfer of the area above the air curtain machine body 1 through the heat-insulating roller shutter 4.

[0049] According to a preferred embodiment, the air curtain machine body 1 further includes a first return air inlet 103, a second return air inlet 104, and a double-sided return air guiding surface 105. The double-sided return air guiding surface 105 is disposed within the housing 106, and has two guiding surfaces. The first return air inlet 103 faces outwards from the cold storage, allowing outside air to enter the housing 106 through one side of the first return air inlet 103 and the double-sided return air guiding surface 105. The second return air inlet 104 faces inwards from the cold storage, allowing inside air to enter the housing 106 through the other side of the second return air inlet 104 and the double-sided return air guiding surface 105. Figure 6 As shown, the mixed air entering the housing 106 is delivered through the air outlet 108 and forms an air curtain. In this preferred embodiment, the air curtain machine body 1 has two return air outlets, which are used to supply air from outside the cold storage and air from inside the cold storage to enter the housing 106, respectively. This makes the return air of the air curtain machine body 1 a mixture of air from inside and outside the cold storage, thereby reducing the temperature gradient between the air curtain and the inside of the cold storage, reducing the cold loss caused by the excessive temperature gradient, reducing the temperature fluctuation in the door area of ​​the cold storage, ensuring the storage temperature in that area, and improving the storage quality.

[0050] According to a preferred embodiment, the return air areas of the first return air inlet 103 and the second return air inlet 104 are approximately equal, and the return air of the air curtain machine body 1 consists of equal parts outside air and inside air. In this preferred embodiment, the return air areas of the first return air inlet 103 and the second return air inlet 104 are approximately equal, thus ensuring that the return air of the air curtain machine body 1 consists of equal parts outside air and inside air. This results in a smaller temperature gradient between the air curtain and both the inside and outside of the cold storage, thereby reducing the cooling loss caused by excessive temperature gradients in the cold storage.

[0051] This is not the only limitation; the proportion of outside air and inside air in the return air is not limited to 50 / 50, but can also be other proportions. For example, the proportion of inside air in the return air is 1 / 3, and the proportion of outside air is 2 / 3.

[0052] According to a preferred embodiment, the air curtain machine body 1 further includes an air guide plate 107, which is rotatably mounted on the housing 106. The angle of the air guide plate 107 is related to the difference between the outside temperature of the cold storage and a preset temperature. Figure 6 or Figure 7 As shown. Preferably, the angle of the air guide plate 107 satisfies: C = 15 + 0.2 (T1 - T2), where C is the angle of the air guide plate 107, T1 is the real-time temperature outside the cold storage, and T2 is the preset temperature outside the cold storage. Specifically, the angle of the air guide plate 107 perpendicular to the ground is 0°, the direction of the air guide plate 107 towards the outside of the cold storage is positive, the initial air delivery angle of the air guide plate 107 is set to 15°, and the preset temperature outside the cold storage T2 is set to 20°C. As the temperature outside the cold storage increases, the air delivery angle of the air guide plate 107 increases by 1°C for every 5°C increase. In this preferred embodiment, the air guide plate 107 is rotatably mounted on the housing 106, and the angle of the air guide plate 107 is adjusted based on the difference between the outside temperature and the preset temperature, thereby realizing the adjustment of the air delivery angle and preventing the cold storage from losing cold energy due to thermal pressure caused by temperature difference.

[0053] However, this is not the only factor. The initial air delivery angle of the air guide plate 107, the preset temperature T2 outside the cold storage, and the relationship between the increase in the angle of the air guide plate 107 and the increase in the outside temperature can also be achieved using other parameters. For example, if the initial air delivery angle of the air guide plate 107 is set to 12° and the preset temperature T2 outside the cold storage is set to 25°C, then for every 3°C increase in the outside temperature, the air delivery angle of the air guide plate 107 increases by 1.2°C.

[0054] According to a preferred embodiment, the air curtain machine further includes a frost-proof baffle 5, which is located at the top of the door 2 and on both sides of the air curtain machine body 1. The frost-proof baffle 5 and the heat-insulating roller shutter 4 form a receiving cavity. When the door 2 is closed, the air curtain machine body 1 is located within the receiving cavity. Figure 6 or Figure 7 As shown. The preferred embodiment of the air curtain machine also includes a frost-proof baffle 5. When the air curtain is not running, that is, when the door 2 is closed, the air curtain machine body 1 is located in the cavity formed between the frost-proof baffle 5 and the heat-insulating roller shutter 4, which helps to reduce the risk of frost formation on the air curtain machine body 1 and greatly avoids the obstruction caused by frost to the subsequent operation of the air curtain machine body 1.

[0055] According to a preferred embodiment, the air curtain machine further includes a heat insulation baffle 6, which is located outside the cold storage and at the top of the door 2. When the door 2 is closed, the heat insulation baffle 6 is used to block heat transfer between the inside and outside of the cold storage. Figure 6 or Figure 7 As shown. The preferred embodiment of the air curtain machine also includes a heat insulation baffle 6. When the door 2 is closed, the heat insulation baffle 6 can block the heat transfer between the inside and outside of the cold storage, thereby reducing the loss of cold energy in the cold storage.

[0056] For example, the maximum opening width of door 2 is 6m, the maximum width of the air curtain is 6m, and the air curtain machine body 1 is equipped with 10 fan sections, each fan section being 0.6m long and 0.2m wide. During actual operation, the opening width of door 2 must be an integer multiple of the number of fan sections; that is, in this embodiment, door 2 must be opened in integer multiples of 0.6m. In this example, the air curtain machine body 1 has 6 fan sections open (total 3.6 meters), and 2 fan sections on each side (1.2 meters each, total 2.4 meters) are not open. The descent range of the air curtain machine body 1 is 0-4m, and it can be steplessly adjusted according to the descent distance (it must remain at least 2 meters above the ground to ensure normal transport needs). Specifically, the angle of the air guide plate 107 is adjusted to 30°, the air curtain machine body 1 has 6 fan sections open (total 3.6m), the air curtain machine body 1 is 4.0m above the ground, and the usable transport area is 14.4m². 2 Furthermore, based on actual transportation needs, the opening width of the door 2 and the opening status of each section of the air curtain machine body 1 are adjusted respectively, thereby achieving the effect of energy saving and blocking unnecessary cold dissipation.

[0057] Example 2

[0058] This embodiment provides a detailed description of the cold storage system of the present invention.

[0059] The cold storage system of this embodiment includes a refrigeration mechanism, a door 2, and an air curtain machine. The door 2 is a sliding door, and the air curtain machine is any of the air curtain machines described in Embodiment 1, such as... Figure 1 As shown. Preferably, the cold storage system also includes a cold storage door guide rail 7, and the door body 2 is slidably mounted on the cold storage door guide rail 7, as shown. Figure 1 As shown. The structure of the refrigeration mechanism and door 2 can be the same as the existing technology, and will not be described in detail here.

[0060] The cold storage system of this embodiment has an air curtain machine of any of the technical solutions in Embodiment 1, which allows the cold storage system to control the number of fan sections of the air curtain machine body 1 to be opened based on the opening width of the door 2. This helps to reduce the energy consumption of the air curtain machine body 1, thereby reducing the energy consumption of the cold storage system of this embodiment.

[0061] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0062] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0063] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An air curtain machine, characterized in that, Includes an air curtain machine body (1), which is installed on the door (2). The air curtain machine body (1) is used to supply air and form an air curtain. The air curtain machine body (1) has multiple fan sections. Based on the opening width of the door (2), the width of the air curtain is adjusted by the number of fan sections that are opened. It also includes a guide rail (3), on which the air curtain machine body (1) is slidably mounted. Based on the opening height of the door (2), the height of the air curtain is adjusted by the height of the air curtain machine body (1) from the ground, and the rotation speed of the motor (101) is related to the height of the air curtain machine body (1) from the ground.

2. The air curtain machine according to claim 1, characterized in that, The fan sections are symmetrically arranged on both sides of the middle seam of the door (2). Based on the opening width of the door (2), the fan sections in the open state are symmetrically located on both sides of the middle seam of the door (2), and the air supply width of the air curtain is not less than the opening width of the door (2).

3. The air curtain machine according to claim 1, characterized in that, The fan section includes a motor (101) and a fan blade assembly (102), wherein the number of the motor (101) and the fan blade assembly (102) is even, and the number of the motor (101) is equivalent to the number of the fan blade assembly (102).

4. The air curtain machine according to claim 1, characterized in that, The height of the air curtain machine body (1) from the ground decreases as the opening height of the door (2) decreases, and the rotation speed of the motor (101) decreases as the height of the air curtain machine body (1) from the ground decreases. The height of the air curtain machine body (1) above the ground increases as the opening height of the door (2) increases, and the rotation speed of the motor (101) increases as the height of the air curtain machine body (1) above the ground increases.

5. The air curtain machine according to claim 1, characterized in that, It also includes a heat-insulating roller shutter (4), which is installed on the door body (2). The heat-insulating roller shutter (4) has an unfolded state and a tightened state, and the unfolded height of the heat-insulating roller shutter (4) is related to the height of the air curtain machine body (1) from the ground.

6. The air curtain machine according to claim 5, characterized in that, The unfolded height of the heat-insulating roller shutter (4) and the height of the air curtain machine body (1) from the ground satisfy the following relationship: H1+H2=H, where H is the height of the door body (2), H1 is the unfolded height of the heat-insulating roller shutter (4), and H2 is the height of the air curtain machine body (1) from the ground.

7. The air curtain machine according to claim 1, characterized in that, The air curtain machine body (1) further includes a first return air inlet (103), a second return air inlet (104), and a double-sided return air guide surface (105). The double-sided return air guide surface (105) is disposed within the housing (106) and has two guide surfaces. The first return air inlet (103) faces the outside of the cold storage, and allows air from outside the cold storage to enter the housing (106) through the first return air inlet (103) and one side of the double-sided return air guide surface (105); The second return air vent (104) faces the inside of the cold storage, and allows the air inside the cold storage to enter the housing (106) through the second return air vent (104) and the other side of the double-sided return air guide surface (105).

8. The air curtain machine according to claim 7, characterized in that, The return air areas of the first return air inlet (103) and the second return air inlet (104) are equivalent, and the return air of the air curtain machine body (1) is composed of 1 / 2 outside air and 1 / 2 inside air.

9. The air curtain machine according to claim 1, characterized in that, The air curtain machine body (1) also includes an air guide plate (107), which is rotatably mounted on the housing (106), and the angle of the air guide plate (107) is related to the difference between the outside temperature of the cold storage and the preset temperature.

10. The air curtain machine according to claim 9, characterized in that, The angle of the air guide plate (107) satisfies: C=15+0.2(T1-T2), where C is the angle of the air guide plate (107), T1 is the real-time temperature outside the cold storage, and T2 is the preset temperature outside the cold storage.

11. The air curtain machine according to claim 1, characterized in that, It also includes a frost baffle (5), which is located at the top of the door (2) and on both sides of the air curtain machine body (1), and forms a receiving cavity between the frost baffle (5) and the heat insulation roller shutter (4). When the door (2) is closed, the air curtain machine body (1) is located in the receiving cavity.

12. The air curtain machine according to claim 1, characterized in that, It also includes a heat insulation baffle (6), which is located outside the cold storage and at the top of the door (2). When the door (2) is closed, the heat insulation baffle (6) is used to block the heat transfer between the inside and outside of the cold storage.

13. A cold storage system, characterized in that, It includes a refrigeration mechanism, a door (2) and an air curtain machine, wherein the door (2) is a sliding door and the air curtain machine is the air curtain machine according to any one of claims 1 to 12.

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