A system and method for taking fresh air from an air conditioning box

Abstract

The present invention discloses a system and method for taking in fresh air for an air-conditioning box. The system is located inside a building and includes an alley and an air intake window; the internal space of the alley is formed by the side walls of the alley enclosed between the top surface and the bottom surface of the alley; the side walls of the alley include the facade wall side walls and the inner wall side walls; the facade wall side walls are the facade walls of the building, and the inner wall side walls are the inner walls of the building; the air intake window is located on the facade wall side walls, and a fresh air intake waterproof part is provided on the air intake window, so that outside air can enter the alley through the fresh air intake waterproof part, and can also block some rainwater and some dust from entering the alley; the air intake port of the air-conditioning box is provided on the inner wall side walls, the top surface of the alley and / or the bottom surface of the alley. The system and method of the present invention solve the problem that the outdoor air-taking air-conditioning box is prone to inhaling external particles and rainwater, and that indoor air intake may affect the short circuit of indoor electrical equipment.

Description

Technical Field

[0001] The present invention belongs to the field of clean heating and ventilation, specifically to a system and method for drawing fresh air from an air conditioning unit. This invention avoids the conventional method of drawing air directly from the outside, which can easily cause the clean air conditioning unit to absorb particulate matter and rainwater. It also avoids drawing air indoors, which can cause relative humidity to approach dew point in the summer, potentially affecting the safe operation of indoor electrical equipment. Background Art

[0002] To achieve the desired level of purification and appropriate temperature and humidity within a clean area, a clean air conditioning unit is required to circulate air for purification and temperature and humidity control. This clean air conditioning unit must draw fresh air, either in whole or in part, from the outside. There are two broad methods for obtaining fresh air: directly from the outside and from indoors.

[0003] During the rainy season, if some rainwater is sucked into the outdoor air during normal operation, the resistance drop of the primary and secondary effects will increase, and eventually the air supply volume of the air conditioning box will fluctuate greatly.

[0004] Without fresh air units, indoor air intake will introduce a large amount of dust. Fresh air is processed by traditional fresh air units before being delivered indoors, with the cleanroom air conditioner's power distribution cabinet and fresh air supply located in the same room. In the summer, after cooling, the fresh air unit outputs dew-point air (which consumes significant energy to heat up again), which can easily cause short circuits in indoor electrical wiring. Summary of the Invention

[0005] In order to solve the problem that outdoor air-intake air-conditioning boxes are prone to inhaling external particles and rainwater, and that indoor air intake may affect the short circuit of indoor electrical equipment, the present invention provides a system for air-conditioning boxes to take in fresh air, which is located in a building and includes an alley and an air intake window; the internal space of the alley is formed by the side walls of the alley enclosed between the top surface and the bottom surface of the alley; the side walls of the alley include the facade wall side walls and the inner wall side walls; the facade wall side walls are the exterior facade walls of the building, and the inner wall side walls are the interior walls of the building; the air intake window is located on the facade wall side walls, and the air intake window is provided with a fresh air waterproof part, so that outside air can enter the alley through the fresh air waterproof part, and can also block some rainwater and some dust from entering the alley; the air intake of the air-conditioning box is provided on the inner wall side walls, the top surface of the alley and / or the bottom surface of the alley. The air-conditioning box served by the system for taking in fresh air from the air-conditioning box is located outside the alley and takes in fresh air through the air intake of the air-conditioning box. The tunnel top surface and tunnel bottom surface generally refer to the tunnel ceiling and tunnel floor respectively, but are not limited to the ceiling and floor.

[0006] Furthermore, the air-conditioning box is a clean air-conditioning box.

[0007] In some embodiments, a filter is also included; the filter is arranged in the alley, between the fresh air waterproof component and the air intake of the air-conditioning box, dividing the internal space of the alley into a pre-filtration space and a post-filtration space; the pre-filtration space is the space between the fresh air waterproof component and the filter; the post-filtration space is the space on the side of the filter facing away from the fresh air waterproof component.

[0008] Furthermore, the pore size of the filter is 30 to 100 meshes, and the specific pore size is determined according to the actual situation in the area. The main function is to protect the surface of the heat exchanger and the primary and secondary efficiency filters of the air-conditioning box.

[0009] Furthermore, the filter screen is a stainless steel filter screen, such as a stainless steel sintered screen, and is detachably arranged in the lane.

[0010] Furthermore, the filter is removably installed within the tunnel by means of insertion and removal. This refers to the ability to remove or insert the filter from outside the tunnel. The inner surfaces of the tunnel sidewalls, roof, and floor, which are exposed to the tunnel's interior, are constructed of dust-free materials, such as color-coated steel plates or polyurethane coatings. The fresh air waterproofing components are waterproof blinds.

[0011] In some embodiments, a heat exchanger is also included; the heat exchanger is arranged in the alley, between the filter and the air intake of the air-conditioning box, dividing the space after filtration into the space before the heat exchanger treatment and the space after the heat exchanger treatment; the space before the heat exchanger treatment is the space between the filter and the heat exchanger; the space after the heat exchanger treatment is the space on the side of the heat exchanger facing away from the filter.

[0012] In some embodiments, the heat exchanger is controlled by a building monitoring system (BMS) in the building, and the refrigerant and the heating medium are automatically switched according to seasonal changes.

[0013] In some embodiments, a BMS is further included, and the heat exchanger is controlled by the BMS to automatically switch between the refrigerant and the heat medium according to seasonal changes.

[0014] In some embodiments, the heat exchanger passes a heat medium in winter to heat the incoming fresh air to protect the surface coolers in the air conditioner from freezing and cracking. In summer, the heat exchanger passes a refrigerant to assist the air conditioner in reducing the enthalpy of the outside fresh air. The system also includes a floor drain located at the bottom of the alley. Condensate generated by dehumidification of the surface coolers in the air conditioner is discharged into the alley through a pipe and then drained through the floor drain at the bottom of the alley.

[0015] Furthermore, the heat exchanger is provided with a drain point.

[0016] In some embodiments, the tunnel includes six faces and is in the shape of a rectangular parallelepiped; the six faces are the first side face, the second side face, the third side face, the fourth side face, the tunnel top face and the tunnel bottom face; the first side face is the exterior wall side wall, opposite to the third side face; the second side face is opposite to the fourth side face; the second side face, the third side face and the fourth side face are all interior wall side walls.

[0017] In some embodiments, a fan and an access door are further included; the fan is arranged in the post-processing space of the heat exchanger; and the access door is arranged on the second side, the third side and / or the fourth side.

[0018] In some embodiments, the cross-section of the tunnel is circular, semicircular, elliptical, triangular, trapezoidal, pentagonal, hexagonal, heptagonal, octagonal, nonagonal, decagonal, undecagonal, or dodecagonal.

[0019] Furthermore, the floor drain has a liquid sealing structure.

[0020] On the other hand, the present invention also provides a method for taking fresh air into an air-conditioning box, which adopts an alley method to take fresh air into the air-conditioning box; the alley method means that the outside air enters the alley through the fresh air waterproof component set on the air intake window, and then enters the air intake of the air-conditioning box set on the side wall, top surface and / or bottom surface of the alley, and the air-conditioning box located outside the alley obtains fresh air through the air intake of the air-conditioning box; the fresh air waterproof component can block some rainwater and some dust from entering the alley.

[0021] Furthermore, the alley method specifically refers to: the outside air enters the alley through the fresh air waterproof part set on the air intake window, then passes through the filter, and enters the air intake of the air-conditioning box set on the side wall, top surface and / or bottom surface of the alley through the heat exchanger. The air-conditioning box located outside the alley obtains fresh air through the air intake of the air-conditioning box.

[0022] Furthermore, the alley method more specifically refers to: the outside air enters the alley through the fresh air waterproof part set on the air intake window, then passes through the filter, is processed by the heat exchanger, and then enters the air intake of the air-conditioning box set on the side wall, top surface and / or bottom surface of the alley with the assistance of the fan. The air-conditioning box located outside the alley obtains fresh air through the air intake of the air-conditioning box.

[0023] Furthermore, the system for taking in fresh air from the air-conditioning box as described above is adopted.

[0024] Beneficial effects include:

[0025] 1. The laneway air intake design of the present invention minimizes external dust and rainwater. Since the laneway is separated from the cleanroom air conditioning room, even if the air transported through the laneway is at dew point, it has no impact on the power distribution cabinets in the cleanroom air conditioning room, thus ensuring the smooth and safe operation of the system.

[0026] 2. Fresh air waterproofing components (such as waterproof blinds) provide ventilation while also blocking some rainwater and dust from entering the alleyway. During the rainy season, rainwater from outside is first blocked by the fresh air waterproofing components, which trap the rainwater outside the building. Rainwater that passes through the fresh air waterproofing components is also intercepted by the filter mesh, flowing onto the alleyway floor and draining out of the floor drain or drainage holes there.

[0027] 3. Installing a filter can protect the heat exchanger surface and the primary and secondary filters of the air conditioner. Large dust particles in the outside air will settle before the filter, thus protecting the heat exchanger surface and the primary and secondary filters of the air conditioner, especially the service life of the primary filter.

[0028] 4. The filter can be detachably arranged in the alley by being inserted and pulled out from outside the alley, which is convenient for replacing and cleaning the filter.

[0029] 5. Heat exchangers installed in the tunnels (using heat transfer in winter and refrigerant in summer) can share the load of the cleanroom air conditioners and heating coils. In winter, the tunnel heat exchangers use heat transfer to heat the fresh air. This protects the cleanroom air conditioners from freezing and cracking, while also shouldering some of the heat load for the cleanroom air conditioners. The heating coils in the cleanroom air conditioners only need to consider the temperature rise load of the machine's dew point. In summer, the tunnel heat exchangers use refrigerant to cool the fresh air and even dehumidify it. If dehumidification is used, the generated water is drained from the tunnel floor drain. In extreme weather, this can help the air conditioners dehumidify, reducing the air conditioner capacity.

[0030] 6. The heat exchanger in the tunnel is controlled by the BMS system, which switches the cooling and heating media and controls the outlet air temperature according to seasonal changes. The heat exchanger needs to be equipped with a drain point so that the water inside can be drained when necessary.

[0031] 7. Especially in the case where there is no fan, the liquid seal structure of the floor drain can prevent the back suction phenomenon caused by the slight negative pressure in the tunnel, that is, the water seal prevents air from entering the tunnel from the floor drain.

[0032] 8. Equipped with fans to avoid backflow from floor drains, and to avoid opening the air intake windows on the building facade too large when there are many air-conditioning boxes connected to the alley, which will affect the stability of the building.

[0033] 9. The inspection door is used for maintenance personnel to enter the tunnel to perform maintenance and cleaning work on the equipment in the tunnel. During normal operation, this inspection door is kept closed.

[0034] 10. The inner surface of the tunnel is made of dust-free material, which is conducive to the delivery of cleaner fresh air.

[0035] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a structural diagram of a specific embodiment of the system for taking fresh air from an air conditioning box involved in the present invention. In order to help understand the working environment of the system for taking fresh air from an air conditioning box of the present invention, Figure 1 The air-conditioning box 20 and part of the building facade wall of the room where the air-conditioning box 20 is located are also shown.

[0037] The accompanying drawings are numerals as follows:

[0038] 1-Fresh air waterproofing parts, 2-Filter, 3-Heat exchanger, 4-Air inlet of air conditioning box, 5-Second side, 6-Third side, 7-Inspection door, 8-Fourth side, 9-Space after heat exchanger treatment, 10-Space after filtration, 11-Space before filtration, 20-Air conditioning box. DETAILED DESCRIPTION

[0039] In order to make the technical means, creative features, objectives and effects of the invention easier to understand, the invention is further described below with reference to specific diagrams. However, the invention is not limited to the following implementation cases.

[0040] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0041] Example 1

[0042] Figure 1 The system for taking fresh air from an air conditioner according to this embodiment is shown. In this embodiment, the system for taking fresh air from an air conditioner is located inside a building and includes a laneway, an air intake window, a filter 2, a heat exchanger 3, a fan, a floor drain, and an inspection door 7.

[0043] The internal space of the alley is formed by the first side, the second side 5, the third side 6 and the fourth side 8 connected in sequence and enclosed between the top surface and the bottom surface of the alley. The first side is the facade of the building; the air intake window is located on the first side, and the air intake window is provided with a fresh air waterproof part 1, so that the outside air can enter the alley through the fresh air waterproof part 1, and can also block some rainwater and some dust from entering the alley. The second side 5, the third side 6, the fourth side 8, the top surface of the alley and / or the bottom surface of the alley are the internal structure of the building. The air intake 4 of the air-conditioning box is provided on the second side 5 and the fourth side 8. The air-conditioning box 20 for serving the system of taking fresh air from the air-conditioning box is located outside the alley and obtains fresh air through the air intake 4 of the air-conditioning box. The air-conditioning box 20 is a clean air-conditioning box.

[0044] The filter 2 is installed in the tunnel, between the fresh air waterproof component 1 and the air intake 4 of the air conditioning unit, dividing the interior space of the tunnel into a pre-filtration space 11 and a post-filtration space 10. The pre-filtration space 11 is the space between the fresh air waterproof component 1 and the filter 2; the post-filtration space 10 is the space between the filter 1 and the third side surface 6.

[0045] The pore size of filter 2 is 30-100 mesh, depending on the actual conditions of the region. Its primary function is to protect the surface of heat exchanger 3 and the primary and secondary filters of the air conditioner. Filter 2 is a stainless steel filter, such as a stainless steel sintered mesh. Filter 2 is removably installed in the tunnel by means of insertion and removal. The insertion and removal method means that filter 2 can be removed from outside the tunnel or inserted into the tunnel. This allows for one filter to be used and one to be in reserve. When the active filter is removed for cleaning, the spare filter can be replaced to continue operation.

[0046] The first side, second side 5, third side 6, fourth side 8, the top and bottom surfaces of the tunnel exposed to the interior space are made of dust-free materials, such as color-coated steel plates, polyurethane coatings, etc. The fresh air waterproof component 1 is a waterproof shutter.

[0047] Heat exchanger 3 is installed in the tunnel, between filter 1 and the air intake 4 of the air conditioning unit, dividing the post-filter space 10 into a pre-heat exchanger treatment space and a post-heat exchanger treatment space 9. The pre-heat exchanger treatment space is the space between filter 2 and heat exchanger 3; the post-heat exchanger treatment space 9 is the space between heat exchanger 3 and the third side surface 6.

[0048] Heat exchanger 3 is controlled by the building's Building Monitoring System (BMS), automatically switching between refrigerant and heating media according to seasonal changes. In winter, heat exchanger 3 passes heating media to heat incoming fresh air, protecting the air conditioner 20 from freezing and cracking. In summer, heat exchanger 3 passes refrigerant to help the air conditioner 20 reduce the enthalpy of the outside fresh air.

[0049] The floor drain is located at the bottom of the tunnel and has a liquid seal structure.

[0050] The fan is arranged in the heat exchanger post-processing space 9. The inspection door 7 is arranged on the second side surface 5, the third side surface 6 and / or the fourth side surface 7, and is arranged on the third side surface 6 in this embodiment.

[0051] Example 2

[0052] In this embodiment, the system for taking in fresh air from the air conditioner also includes a BMS, and the heat exchanger is controlled by the BMS, automatically switching between the refrigerant and the heat medium according to the change of seasons. The rest is the same as in embodiment 1.

[0053] Example 3

[0054] In this embodiment, the air intake of the air conditioner is provided on the second side surface, the fourth side surface, the top surface of the tunnel and the bottom surface of the tunnel.

[0055] Example 4

[0056] In this embodiment, the cross-section of the alley is semicircular. The interior space of the alley is formed by the side walls of the alley enclosed between the top and bottom of the alley; the side walls of the alley include the facade side walls and the inner side walls; the facade side walls are the facade walls of the building, and the inner side walls are the inner walls of the building; the air intake window is located on the facade side walls, and the air intake window is provided with a fresh air waterproof part, so that outside air can enter the alley through the fresh air waterproof part, and can also block some rainwater and some dust from entering the alley; the air intake of the air conditioner is provided on the inner side walls, the top and / or bottom of the alley. The rest is the same as in Example 1.

[0057] Example 5

[0058] In this embodiment, the cross section of the lane is circular. The rest is the same as in embodiment 4.

[0059] Example 6

[0060] This embodiment provides a method for drawing fresh air from an air conditioning unit, which uses a tunnel-type method to draw fresh air from the air conditioning unit. This tunnel-type method involves external air entering the tunnel through a waterproof fresh air intake member located on the air intake window, passing through a filter, and then, after being processed by a heat exchanger, entering the air intake of the air conditioning unit located on the sidewall, top, and / or bottom of the tunnel with the assistance of a fan. Air conditioning units located outside the tunnel draw fresh air through these intake ports. The waterproof fresh air intake member can block some rainwater and dust from entering the tunnel.

[0061] Example 7

[0062] This embodiment is a method for taking in fresh air for an air-conditioning box, which uses the system for taking in fresh air for an air-conditioning box as described in any one of Embodiments 1-5 to take in fresh air for the air-conditioning box.

[0063] Example 8

[0064] In this embodiment, the system for drawing fresh air from air conditioners involves creating a rectangular opening on the exterior facade of the existing building. The size of this opening is determined by the number of clean air conditioners installed and the air volume supplied. Waterproof louvers are installed at the rectangular entrance, and an indoor alley connects to this rectangular opening.

[0065] The tunnel is also equipped with filters (such as stainless steel filters), heat exchangers (heating media in winter and cooling media in summer), and clean air conditioning boxes with openings on both sides of the tunnel for air intake. The tunnel can be equipped with or without fans according to actual needs.

[0066] Aside from the air intake of the cleanroom AC unit (and possibly the condensate drain connection for the cleanroom AC unit), the alleyway is disconnected from the room housing the cleanroom AC unit. The power distribution cabinet for the cleanroom AC unit is located in the same room as the cleanroom AC unit. The alleyway is effectively a relatively closed area from the rest of the room. Its entrance is connected to the waterproof shutters on the building's exterior facade, and its exit is connected to the fresh air inlet of the cleanroom AC unit (connected via the unit's air intake).

[0067] The tunnel can be made of color steel plates and other materials that do not produce dust on the inner surface. A door is set at the end of the tunnel for maintenance personnel to enter to perform maintenance and cleaning work on the equipment. This door is closed during normal operation.

[0068] The stainless steel filter is designed to be removable from the tunnel for replacement and cleaning without shutting down the system. It utilizes 30-100 mesh stainless steel sintered wire, with the specific pore size determined by the specific location. Its primary function is to protect the heat exchanger surface and the primary and secondary efficiency of the air conditioning unit. The heat exchanger is controlled by the BMS system, automatically switching between "refrigerant" and "heating medium" according to seasonal changes.

[0069] Without fans, the tunnel is in a slightly negative pressure state. The floor drain in the tunnel is designed as a liquid seal to prevent backflow.

[0070] The preferred embodiments of the present invention have been described in detail above. It should be understood that numerous modifications and variations based on the concepts of the present invention are possible without inventive effort by those skilled in the art. Therefore, any technical solution that can be derived by one skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A system for taking fresh air from an air-conditioning box, characterized in that: Located in a building, it includes an alley, an air intake window, a filter, a heat exchanger, a floor drain, a fan and an inspection door; the internal space of the alley is formed by the side walls of the alley enclosed between the top surface and the bottom surface of the alley; the side walls of the alley include the side walls of the facade wall and the side walls of the interior wall; the side walls of the facade wall are the exterior walls of the building, and the side walls of the interior wall are the interior walls of the building; the air intake window is located on the side walls of the facade wall, and a waterproof part for taking in fresh air is provided on the air intake window, so that outside air can enter the alley through the waterproof part for taking in fresh air, and can also block some rainwater and some dust from entering the alley; the air intake of the air-conditioning box is provided on the side walls of the interior wall, the top surface of the alley and / or the bottom surface of the alley; The filter is arranged in the lane, between the fresh air waterproof component and the air intake of the air conditioning box, dividing the internal space of the lane into a pre-filter space and a post-filter space; the pre-filter space is the space between the fresh air waterproof component and the filter; the post-filter space is the space on the side of the filter facing away from the fresh air waterproof component; The heat exchanger is arranged in the lane, between the filter and the air intake of the air conditioner, and divides the space after filtration into a space before heat exchanger treatment and a space after heat exchanger treatment; the space before heat exchanger treatment is the space between the filter and the heat exchanger; the space after heat exchanger treatment is the space on the side of the heat exchanger facing away from the filter; the heat exchanger is controlled by the building monitoring system in the building, and automatically switches between refrigerant and heat medium according to seasonal changes; the heat exchanger passes heat medium in winter to heat the incoming fresh air to protect the surface cooler in the air conditioner from freezing and cracking; the heat exchanger passes refrigerant in summer to assist the air conditioner in reducing the enthalpy of the outside fresh air; The floor drain is located at the bottom of the tunnel; the tunnel includes six surfaces and is in the shape of a rectangular parallelepiped; the six surfaces are the first side surface, the second side surface, the third side surface, the fourth side surface, the tunnel top surface and the tunnel bottom surface; the first side surface is the side wall of the exterior facade, opposite to the third side surface; the second side surface is opposite to the fourth side surface; the second side surface, the third side surface and the fourth side surface are all the inner wall side walls; the fan is arranged in the space after treatment by the heat exchanger; the inspection door is arranged on the second side surface, the third side surface and / or the fourth side surface.

2. A method for taking fresh air from an air conditioning box, characterized in that: An alleyway is used to take fresh air for the air-conditioning box; the alleyway method means that the outside air enters the alley through a fresh air waterproof component provided on the air intake window, then passes through a filter, is processed by a heat exchanger, and then enters the air intake of the air-conditioning box provided on the side wall, top surface and / or bottom surface of the alley with the assistance of a fan, and the air-conditioning box located outside the alley obtains fresh air through the air intake of the air-conditioning box; the fresh air waterproof component can block some rainwater and some dust from entering the alley; the system for taking fresh air for the air-conditioning box as claimed in claim 1 is adopted.

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