Hot air curtain machine

Abstract

The invention provides a hot air curtain machine which comprises a shell, a heating device is arranged in the shell, a plurality of air outlets are formed in the bottom of the shell, each air outlet is connected with a flexible door curtain, the flexible door curtains extend in the direction away from the shell, air channels are formed in the flexible door curtains, and air holes are formed in the ends, away from the shell, of the flexible door curtains. The flexible door curtain guides airflow to the ground, the influence of cold air at the bottom of the gate on the indoor temperature is reduced, temperature layering is avoided, the invasion speed of the cold air can be reduced, energy consumption can be reduced, and meanwhile the indoor heat preservation effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air curtain machines, in particular to a hot air curtain machine. Background Art

[0002] In winter, the temperature difference between indoor and outdoor is large, and the cold air outside will penetrate into the indoor space, especially in buildings such as hospitals, shopping malls, restaurants, high-rise buildings, industrial plants, etc. where the doors are frequently opened and closed. Under the influence of the intruding cold air, the indoor temperature tends to drop rapidly, seriously affecting the indoor comfort and energy efficiency. For this reason, air curtains are installed on the doors connecting the indoor and outdoor spaces to separate the indoor and outdoor air and prevent the loss of indoor heat.

[0003] For example, a patent document in China with application number 202121416587.6 and publication date 2022.1.18 discloses an energy-saving hot air curtain machine, which includes a natural air chamber and a hot air chamber. Part of the air flow is discharged through the air outlet of the natural air chamber to form a natural air curtain on the outside, isolating the intrusion of outdoor air; part of the air flow is heated by the hot air chamber and ejected through the exhaust port of the hot air chamber to form a hot air curtain on the inside, replenishing the indoor heat loss.

[0004] The air outlet of the natural wind chamber and the exhaust outlet of the hot air chamber of this energy-saving hot air curtain machine are also set on the outer shell of the air curtain machine. The air flow flows from top to bottom. Since the density of hot air is low, hot air tends to gather at the top, while the density of cold air is high, and cold air will sink to the ground, which will form temperature stratification, and then cause cold air to invade into the room at the bottom of the door. At the same time, the influence of temperature stratification will accelerate the penetration speed of cold air, which will cause the indoor temperature to drop rapidly and increase energy consumption. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a hot air curtain machine, which guides the air flow to the ground through a flexible door curtain, reduces the impact of cold air at the bottom of the door on the indoor temperature, avoids temperature stratification, and thus reduces the intrusion speed of cold air, reduces energy consumption, and improves the indoor warmth effect.

[0006] In order to solve the above technical problems, the technical solution used in the present invention is:

[0007] The hot air curtain machine described in the present invention includes a shell, a warm air device is provided in the shell, a plurality of air outlets are provided at the bottom of the shell, each air outlet is connected to a flexible door curtain, the flexible door curtain extends in a direction away from the shell, an air duct is provided inside the flexible door curtain, and an air hole is provided at the end of the flexible door curtain away from the shell, and the air hole and the air duct are connected to the air outlet.

[0008] Preferably, the flexible door curtain is closed and arranged away from the bottom of the shell, the air holes are arranged on the side walls of the flexible door curtain, and the opening direction of the air holes is arranged perpendicular to the length direction of the flexible door curtain.

[0009] Preferably, there are a plurality of air holes, and adjacent air holes are spaced apart along the length direction of the flexible door curtain.

[0010] Preferably, a counterweight is provided at the bottom of the flexible door curtain away from the outer shell.

[0011] Preferably, a magnetic iron block is provided at the bottom of the flexible door curtain away from the shell.

[0012] Preferably, a magnetic iron block is provided on the outer side wall of the flexible door curtain, and adjacent flexible door curtains are magnetically connected.

[0013] Preferably, the flexible door curtain includes a first sheet and a second sheet, an edge of the first sheet and an edge of the second sheet are connected to each other, and an air passage is formed between the first sheet and the second sheet.

[0014] Preferably, the flexible door curtain includes a first sheet and a second sheet, the edge of the first sheet is connected to the edge of the second sheet; a cavity is formed between the first sheet and the second sheet, and a partition structure is provided in the cavity, which divides the cavity into multiple airways.

[0015] Preferably, the flexible door curtain is a flexible door curtain made of heat insulating material.

[0016] Compared with the prior art, the beneficial effects of the hot air curtain machine described in the present invention are mainly reflected in: a flexible door curtain is set to guide the airflow to the ground, and the hot air will react with the cold air invading from the bottom, reducing the impact of the cold air on the indoor temperature; the air duct is set in the flexible door curtain, which realizes the airflow transmission while blocking the cold air through the flexible door curtain, reducing the invasion of cold air and improving the indoor warmth effect; at the same time, the airflow will flow upward again after being discharged at a height close to the ground, and the temperature difference between different height positions is small; temperature stratification is avoided, thereby reducing the invasion speed of cold air and reducing energy consumption.

[0017] By installing a flexible curtain, airflow is directed to the ground, and hot air is discharged through the air holes, achieving a bottom-up air supply. This simple structure avoids the sand and dust pollution caused by the air outlet being placed directly on the ground. At the same time, the bottom of the flexible curtain is closed to prevent dust problems caused by air blowing directly to the ground. By providing multiple air holes, the efficiency of hot air exhaust is improved, further enhancing the indoor warmth.

[0018] A counterweight is installed to counterbalance the flexible curtain, preventing it from swinging in the presence of hot air. A magnetic block at the bottom of the curtain mates with a magnetic block at the bottom of the door to secure it. Adjacent curtains are magnetically connected, so when separated, they remain magnetically locked together, minimizing the risk of hot air escaping.

[0019] Flexible door curtains made of thermal insulation materials can reduce heat transfer and improve indoor warmth. At the same time, hot air will not exchange heat with the external cold air when flowing through the air duct inside the flexible door curtain. The hot air output from the air holes has a high temperature and has a good neutralizing effect on the cold air invading the room.

[0020] The present invention guides the airflow to the ground through the flexible door curtain, realizes the transmission of the airflow and blocks the cold air through the flexible door curtain at the same time, reduces the impact of the cold air on the indoor temperature, avoids temperature stratification, and thus can reduce the invasion speed of cold air, reduce energy consumption, and improve the indoor warmth effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the accompanying drawings, and the drawings are not drawn to scale with actual size. The emphasis is on illustrating the subject matter of the present invention.

[0022] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0023] Figure 2 It is another visual perspective schematic diagram of the present invention.

[0024] Figure 3 Schematic diagram of the flexible door curtain in the present invention.

[0025] Figure 4 for Figure 3 Cross-sectional view of AA in the figure.

[0026] Figure 5 This is a cross-sectional schematic diagram of the flexible door curtain and the outer shell in this embodiment.

[0027] Figure 6 Schematic cross-section of the flexible door curtain and the outer shell in another embodiment.

[0028] Description of the accompanying drawings: housing 1, air outlet 11; heating device 2; flexible door curtain 3, first sheet 31, second sheet 32; air duct 4, air hole 41; partition structure 5. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it. However, the embodiments given do not limit the present invention. In this embodiment, it should be understood that the directions or positional relationships indicated by terms such as "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention.

[0030] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element and integrated therewith, or there may be an intermediate element. The terms "mounted," "one end," "the other end," and similar expressions used in this invention are for illustrative purposes only.

[0031] like Figure 1-6 As shown, a hot air curtain machine includes a housing 1, a heating device 2 is provided in the housing 1, and a plurality of air outlets 11 are provided at the bottom of the housing 1. Each air outlet 11 is connected to a flexible door curtain 3, which extends in a direction away from the housing 1. An air duct 4 is provided inside the flexible door curtain 3, and an air hole 41 is provided at the end of the flexible door curtain 3 away from the housing 1. The air hole 41 and the air duct 4 are connected to the air outlet 11. The flexible door curtain 3 is provided to guide the air flow toward the ground, and the hot air will react with the cold air invading from the bottom, reducing the impact of the cold air on the indoor temperature; the air duct 4 is provided in the flexible door curtain 3, which realizes the transmission of the air flow while blocking the cold air through the flexible door curtain 3, reducing the intrusion of cold air and improving the indoor warming effect; at the same time, the air flow will flow upward again after being discharged at a height close to the ground, and the temperature difference between different heights is small, thus avoiding temperature stratification, thereby reducing the intrusion speed of cold air and reducing energy consumption.

[0032] The flexible door curtain 3 is located away from the bottom of the housing 1 and is closed. The air holes 41 are located on the side walls of the flexible door curtain 3, and the opening direction of the air holes 41 is perpendicular to the length direction of the flexible door curtain 3. By providing the flexible door curtain 3, the air flow is guided to the ground, and the hot air is discharged from the air holes 41, achieving a bottom-up air supply, which is simple in structure. This avoids the sand and dust pollution caused by the air outlet 11 being located directly on the ground. At the same time, the bottom of the flexible door curtain 3 is closed, which avoids the dust problem caused by air blowing directly on the ground.

[0033] The flexible door curtain 3 is sealedly connected to the air outlet 11. Preferably, the flexible door curtain 3 is connected to the air outlet 11 via a clamp.

[0034] Preferably, the air holes 41 are provided in plurality, and adjacent air holes 41 are spaced apart along the length direction of the flexible door curtain 3. By providing a plurality of air holes 41, the exhaust efficiency of hot air is improved, and the indoor warmth-keeping effect is further improved.

[0035] The flexible door curtain 3 is made of a thermally insulating material such as polyethylene or polypropylene. In this embodiment, the flexible door curtain 3 is preferably made of polypropylene. The thermally insulating material reduces heat transfer, thereby improving the indoor warmth. Furthermore, as hot air flows through the air duct 4 within the flexible door curtain 3, it does not exchange heat with the cold air outside. The hot air output from the air holes 41 is high in temperature, effectively neutralizing the intruding cold air.

[0036] In this embodiment, the outdoor cold air temperature is 20°C and the heating device 2 outputs hot air at 40°C as an example; under the action of the thermal insulation material of the flexible door curtain 3, the heat loss of the hot air discharged from the air holes is small; as the hot air flows, the hot air will first mix with the cold air and then continue to flow upward; then at the bottom of the door, the hot air is discharged from the air holes, and the temperature of this area is 40°C; in the middle of the door, the hot air is mixed with the cold air, and the temperature of this area is 10°C-20°C; the temperature at the top of the door is 15°C.

[0037] Table 1 is a comparison table of different air supply methods.

[0038] Comparison Item Downward air flow from the top of the door Side air supply of the door Air is supplied upward from the bottom of the door Door top temperature 40℃ 15℃ 18℃ Temperature at the middle of the door 5℃ to 15℃ 10℃ to 20℃ 15℃ to 25℃ Door bottom temperature -10℃ 40℃ 40℃ Wind speed at top of door 10m / s 2m / s 2m / s Wind speed at the middle of the entrance 8m / s 6m / s 6m / s Wind speed at bottom of door 2m / s 8m / s 8m / s Cold air penetration rate 1.2m / s 0.8m / s 0.5m / s Cold air penetration <![CDATA[29,920m 3 / h]]> <![CDATA[17,280m 3 / h]]> <![CDATA[10,800m 3 / h]]> Hot air escape About 15kW (75%) About 8kW (40%) About 6kW (30%) Energy efficiency Lower Higher Highest

[0039] Table 1

[0040] As shown in Table 1, the present invention utilizes the air outlet in conjunction with the flexible door curtain to guide the hot air to the bottom of the door, thereby supplying air upward from the bottom of the door, blocking the intrusion of cold air from the bottom, reducing the infiltration speed of cold air, reducing the amount of cold air infiltration, and reducing the escape of hot air.

[0041] In this embodiment, the flexible door curtain 3 includes a first sheet 31 and a second sheet 32, the edge of the first sheet 31 and the edge of the second sheet 32 ​​are connected to each other; a cavity is formed between the first sheet 31 and the second sheet 32, and a partition structure 5 is provided in the cavity, which divides the cavity into a plurality of air channels 4; preferably, the edge of the first sheet 31 and the edge of the second sheet 32 ​​are sewn together, and the partition structure 5 is a suture; the air hole 41 is provided at the connection between the first sheet 31 and the second sheet; the first sheet 31 and the second sheet 32 ​​are sewn together, which has good reliability. Figure 4 As shown, the first sheet 31 and the second sheet 32 ​​are both made of polypropylene.

[0042] The heating device 2 is a conventional technology. In this embodiment, the heating device 2 is a heater. The input end of the heating device 2 extends outside the housing 1, and the output end of the heating device 2 is arranged opposite to the air outlet 11. This improves the efficiency of hot air discharge. In other embodiments, the heating device 2 can be an air source heat pump or a water source heat pump.

[0043] In a preferred embodiment, the heating device 2 is an air source heat pump; the air source heat pump includes a compressor, a condenser, an expansion valve and an evaporator; the compressor, condenser, expansion valve and evaporator are all electrically connected to a power supply; the output end of the compressor is connected to the input end of the condenser, the input end of the condenser is connected to the input end of the evaporator through the expansion valve, and the output end of the evaporator is connected to the input end of the compressor. The evaporator and the compressor are arranged outside the shell 1, the condenser is arranged inside the shell 1, and the expansion valve is arranged in the pipeline connecting the condenser and the evaporator; the air source heat pump has an air outlet, which is arranged inside the shell 1; air enters the evaporator to exchange heat with the refrigerant, the refrigerant evaporates into a low-temperature, low-pressure gas, the compressor sucks in the low-temperature, low-pressure gas and compresses it, the compressed high-temperature, high-pressure gas enters the condenser and condenses into a liquid, and the heat-exchanged air is discharged from the air outlet. In another preferred embodiment, the evaporator and the compressor are installed outdoors, and the condenser is installed inside the shell 1.

[0044] Reference Figure 5 As shown, in another embodiment, the flexible door curtain 3 includes a first sheet 31 and a second sheet 32, and the edge of the first sheet 31 and the edge of the second sheet 32 ​​are connected to each other, forming an airway 4 between the first sheet 31 and the second sheet 32; preferably, the edge of the first sheet 31 and the edge of the second sheet 32 ​​are sewn together.

[0045] In a preferred embodiment, a counterweight (not shown) is provided at the bottom of the flexible curtain 3, away from the housing 1. This counterweight balances the flexible curtain 3 and prevents it from swaying under the influence of hot air. This improves the sealing effect of the flexible curtain 3 on the door and reduces the amount of hot air escaping.

[0046] In a preferred embodiment, a magnetic block (not shown) is provided at the bottom of the flexible door curtain 3, away from the housing 1. The magnetic block at the bottom of the flexible door curtain 3 is designed to cooperate with the magnetic block at the bottom of the door. When the flexible door curtain 3 is opened, the bottom of the flexible door curtain 3 can be magnetically attracted and closed to the bottom of the door under the action of magnetism, thereby reducing the amount of hot air escaping.

[0047] In a preferred embodiment, a magnetic iron block (not shown) is provided on the outer side wall of the flexible door curtain 3, and adjacent flexible door curtains 3 are magnetically connected. To open the flexible door curtain 3, the flexible door curtain 3 is lifted, and adjacent flexible door curtains 3 are separated by an external force. After the adjacent flexible door curtains 3 are separated, they are attracted and closed by the magnetic force, which can reduce the escape of hot air.

[0048] In this specification, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0049] In the description of this specification, the description with reference to the terms "preferred embodiment", "further embodiment", "other embodiments" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0050] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A hot air curtain machine, comprising a housing, a heating device provided in the housing, characterized in that: There are multiple air outlets at the bottom of the shell, each air outlet is connected to a flexible door curtain, the flexible door curtain extends away from the shell, an air duct is provided inside the flexible door curtain, and an air hole is provided at the end of the flexible door curtain away from the shell, and the air hole and the air duct are connected to the air outlet.

2. The hot air curtain machine according to claim 1, characterized in that: The flexible door curtain is closed and arranged away from the bottom of the shell, the air holes are arranged on the side walls of the flexible door curtain, and the opening directions of the air holes are arranged perpendicular to the length direction of the flexible door curtain.

3. The hot air curtain machine according to claim 2, characterized in that: There are a plurality of air holes, and adjacent air holes are spaced apart along the length direction of the flexible door curtain.

4. The hot air curtain machine according to claim 1, characterized in that: A counterweight is provided at the bottom of the flexible door curtain away from the outer shell.

5. The hot air curtain machine according to claim 1, characterized in that: A magnetic iron block is arranged at the bottom of the flexible door curtain away from the shell.

6. The hot air curtain machine according to claim 1, characterized in that: A magnetic iron block is provided on the outer side wall of the flexible door curtain, and adjacent flexible door curtains are connected by magnetic attraction.

7. The hot air curtain machine according to claim 1, characterized in that: The flexible door curtain comprises a first sheet and a second sheet. The edge of the first sheet is connected to the edge of the second sheet, and an air passage is formed between the first sheet and the second sheet.

8. The hot air curtain machine according to claim 1, characterized in that: The flexible door curtain includes a first sheet and a second sheet, the edge of the first sheet is connected to the edge of the second sheet; a cavity is formed between the first sheet and the second sheet, and a partition structure is provided in the cavity, which divides the cavity into multiple airways.

9. The hot air curtain machine according to claim 1, characterized in that: The flexible door curtain is made of heat-insulating material.

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