Air conditioner indoor unit and clean air conditioning system

Abstract

The utility model relates to an air conditioner indoor unit and a clean air conditioning system, the air conditioner indoor unit comprises a shell, the shell is internally divided into an air return cavity, a heat exchange cavity and an air supply cavity, the shell of the air return cavity is provided with an air return port and a fresh air port, the shell of the air supply cavity is provided with an air supply port, an air supply fan is arranged in the air supply cavity, and the heat exchange cavity is internally provided with a heat exchange fan. A heat exchange module is installed in the heat exchange cavity, an air inlet and an air outlet of the heat exchange module communicate with the air return cavity and the air supply cavity correspondingly, an adjustable fresh air valve is installed at the fresh air inlet, and an air flow channel directly communicating the air return cavity with the air supply cavity is formed in the shell. And an adjustable air valve is mounted on the air flow channel. The air valve is used for adjusting the air flow passing through the air flow channel and the heat exchange cavity, and is matched with the fresh air valve at the fresh air opening, so that the temperature and the positive pressure value of the indoor space are finely adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of air conditioning equipment technology, especially to an air conditioner indoor unit and clean air conditioning system. BACKGROUND

[0002] Because of the requirement of production process, the clean workshop needs to control temperature, humidity and clean level in a certain range, when the indoor temperature control system and clean system of the clean workshop are reconstructed, the air-cooled heat pump is usually used to cooperate with the indoor combined air conditioning unit or other form water system type, the indoor unit of the reconstructed form usually has only one, and the working mode can only be two modes of opening and closing, and the load cannot be adjusted according to the outdoor environment temperature, which can cause energy consumption increase. Moreover, for the indoor environment with relatively large area, multiple indoor units are usually needed to be installed, so that not only the indoor space is occupied, the pipeline connection is complex, and the cost is high, and at the same time, the existing clean air conditioning system does not have the function of fine adjustment of the positive pressure value of the indoor space. SUMMARY

[0003] The first technical problem solved by the utility model is to provide an air conditioner indoor unit with compact structure, high integration degree and fine adjustment of the positive pressure value of the indoor space.

[0004] The second technical problem solved by the utility model is to provide a clean air conditioning system using the above-mentioned air conditioner indoor unit.

[0005] To solve the above-mentioned first technical problem, the basic idea of the technical scheme of the utility model is:

[0006] An air conditioner indoor unit comprises a shell, a return air cavity, a heat exchange cavity and a supply air cavity are separated in the shell, a return air opening and a fresh air opening are arranged on the shell of the return air cavity, a supply air opening is arranged on the shell of the supply air cavity, a supply air fan is installed in the supply air cavity, a heat exchange module is installed in the heat exchange cavity, the air inlet and air outlet of the heat exchange module are communicated with the return air cavity and the supply air cavity respectively, an adjustable fresh air valve is installed at the fresh air opening, an air flow channel directly connecting the return air cavity and the supply air cavity is arranged in the shell, and an adjustable air valve is installed on the air flow channel.

[0007] Further, the heat exchange cavity is surrounded by a surrounding plate in the shell, the space between the surrounding plate and the shell forms the air flow channel, the surrounding plate extends outwardly from the heat exchange cavity and is connected with the shell, a ventilation opening is arranged on the extended surrounding plate corresponding to the air flow channel, and the air valve is installed at the ventilation opening.

[0008] Further, the heat exchange module comprises a plurality of heat exchange units stacked together from top to bottom, each of the heat exchange units comprising a heat exchanger and a fan, and the heat exchanger is connected with the outdoor heat exchanger through a refrigerant connecting pipe.

[0009] Further, each of the heat exchange units comprises a shell, and the heat exchanger and the fan are installed in the shell, and an air inlet and an air outlet are arranged on the shell.

[0010] Further, a primary filter device is installed at the air inlet side of the heat exchange cavity, and a medium filter device is installed at the air inlet side of the air supply cavity.

[0011] Further, a maintenance cavity is arranged between the air outlet side of the heat exchange cavity and the medium filter device, and a maintenance door is arranged on the shell of the maintenance cavity.

[0012] Further, a humidifying device is installed in the air supply cavity.

[0013] Further, the air conditioner indoor unit is installed outside the indoor space requiring temperature control.

[0014] To solve the above-mentioned second technical problem, the basic idea of the technical scheme of the utility model is:

[0015] A clean air conditioning system comprises an outdoor unit, an indoor unit, an air supply air duct assembly and an air return air duct assembly, the indoor unit adopts the air conditioner indoor unit as described above, the air supply air duct assembly is communicated with the air supply cavity, the air return air duct assembly is communicated with the air return cavity, an indoor air supply port communicated with the indoor space is arranged on the air supply air duct assembly, and an indoor air return port communicated with the indoor space is arranged on the air return air duct assembly.

[0016] Further, a clean module for purifying air is arranged at the inlet end communicated with the air supply cavity.

[0017] Compared with the prior art, the air conditioner indoor unit and the clean air conditioning system provided by the utility model have the following advantages:

[0018] (1) In the utility model, the heat exchange module is integrated and installed in the heat exchange cavity, the overall structure is compact, the integration degree is high, the air flow channel for directly connecting the air return cavity and the air supply cavity is arranged between the heat exchange cavity and the shell, and the air flow through the air flow channel and the heat exchange cavity is adjusted by the air valve, and the fresh air valve at the fresh air port is matched, so that the fine adjustment of the positive pressure value of the indoor space can be realized.

[0019] (2) The heat exchange module in the utility model can be used as an air conditioner indoor unit, and can be independently adjusted and controlled, which is beneficial to accurately adjusting the number of heat exchangers participating in refrigeration or heating circulation according to outdoor environment temperature and indoor load, accurately adjusting the amount of refrigerant participating in refrigeration or heating circulation, finely adjusting indoor temperature and humidity, and reducing energy consumption of the air conditioning system.

[0020] (3) The air conditioner indoor unit in the utility model can be integrally installed outside an indoor space, and is connected with the indoor space only through the air supply duct assembly and the return air duct assembly, so that the air conditioner indoor unit can be avoided from being installed in the indoor space, the indoor space is not occupied, the purpose of saving energy and reducing consumption is achieved, and the cost of the air conditioning system is greatly reduced.

[0021] (4) All the heat exchange units in the utility model are stacked together from top to bottom, the air inlet side and the air outlet side of each heat exchange unit are connected with the return air cavity and the air supply cavity of the air conditioner indoor unit, a plurality of heat exchange units are arranged in parallel on the air flow path from the return air to the air supply, which is further beneficial to finely adjusting the temperature and humidity of the indoor environment, the overall structure of the heat exchange module is more compact, a plurality of air conditioner indoor units are integrated and installed together, the space occupied is small, the degree of integration is high, and the number of heat exchange units integrated and installed together can be selected according to the design requirement of the air conditioning system, and the degree of modularization is high.

[0022] The specific embodiments of the utility model will be further described in detail in combination with the drawings. DRAWINGS

[0023] The drawings are part of the utility model, which is used to provide a further understanding of the utility model, the schematic embodiments of the utility model and the description thereof are used to explain the utility model, but do not constitute improper limitation on the utility model. Obviously, the drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creating labor.

[0024] In the drawings:

[0025] Figure 1 is a structure schematic diagram of the air conditioning system of the utility model;

[0026] Figure 2 is a structure schematic diagram of the air conditioner indoor unit of the utility model;

[0027] Figure 3 is a structure schematic diagram of the heat exchange module and the air vent of the utility model;

[0028] Figure 4 is a structure schematic diagram of the heat exchange unit of the utility model;

[0029] Figure 5 Fig. 1 is a schematic diagram of an end air supply air duct structure of the present application.

[0030] In the drawings:

[0031] Indoor space 1, heat exchange module 2, heat exchange unit 3, heat exchanger 31, fan 32, shell 33, air inlet 34, air outlet 35, refrigerant connecting pipe 4, outdoor unit 5, air conditioner indoor unit 6, shell 61, return air cavity 7, heat exchange cavity 8, air supply cavity 9, return air inlet 10, air supply inlet 11, fresh air inlet 12, air supply air duct assembly 13, air supply main air duct 131, air supply branch air duct 132, return air air duct assembly 14, return air main air duct 141, return air branch air duct 142, primary filter device 15, medium-efficiency filter device 16, air supply fan 17, humidifying device 18, maintenance cavity 19, indoor air supply inlet 20, indoor return air inlet 21, end air supply air duct 22, mesh plate 23, cover plate 24, air vent 25, air valve 26.

[0032] It should be noted that the drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments will be described clearly and completely below with reference to the drawings of the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0034] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] Embodiment one:

[0037] As Figures 1 to 4 shown, the air conditioner indoor unit 6 includes a shell 61, and a return air cavity 7, a heat exchange cavity 8 and a supply air cavity 9 are separated in the shell 61. The shell 61 is preferably made of polyurethane color steel plate.

[0038] The heat exchange module 2 is installed in the heat exchange cavity 8, and the air inlet and outlet of the heat exchange module 2 are respectively communicated with the return air cavity 7 and the supply air cavity 9. The return air opening 10 and the fresh air opening 12 are formed on the shell 61 of the return air cavity 7, and the supply air opening 11 is formed on the shell 61 of the supply air cavity 9. The supply air fan 17 is installed in the supply air cavity 9. The return air opening 10 is communicated with the indoor space 1 through the return air duct assembly 14, and the supply air opening 11 is communicated with the indoor space 1 through the supply air duct assembly 13.

[0039] In this embodiment, an adjustable fresh air valve (not shown in the figure) is installed at the fresh air opening 12, and an air flow passage (not shown in the figure) directly connecting the return air cavity 7 and the supply air cavity 9 is arranged in the shell 61. An adjustable air valve 26 is installed on the air flow passage.

[0040] As Figure 2 and Figure 3 shown, in this embodiment, the heat exchange cavity 8 is surrounded by the surrounding plate, that is, the heat exchange cavity 8 is separated in the shell 61 of the air conditioner indoor unit 6 by the surrounding plate according to the number of heat exchange units 3. The height or width of the heat exchange cavity 8 is smaller than that of the shell 61 of the air conditioner indoor unit, and a certain space is left above or on the left and right sides of the heat exchange cavity 8, which forms the air flow passage. The surrounding plate on the air inlet side of the heat exchange cavity 8 extends upward or to the left and right sides to the shell 61 of the air conditioner indoor unit 6. The air vent 25 is formed on the corresponding surrounding plate in the space, and the air vent 25 is on and communicated with the air flow passage. As Figure 3 shown, in this embodiment, the air vent 25 is formed on the surrounding plate on the right side of the heat exchange module 2, and the air vent 25 is located on the leeward side of the primary filter device 15. The space is directly communicated with the rear supply air cavity 9. The air valve 26 is installed at the air vent 25. The return air passing through the air vent 25 will directly enter the rear supply air cavity 9 through the space. The air flow through the heat exchange cavity 8 can be adjusted by adjusting the opening degree of the air valve 26.

[0041] The return air entering the return air cavity 4 can pass through the air vent 25 in a set proportion. For example, the air vent 25 can be opened to the maximum, so that all the return air directly enters the rear medium filter device 16 after passing through the air vent 25, without passing through the heat exchange cavity 8, thereby reducing the air flow resistance. Alternatively, the air vent 25 can be closed, so that all the return air enters the heat exchange cavity 8 for heat exchange. Alternatively, the air valve at the air vent 25 is opened to 30%, so that 30% of the return air directly enters the rear medium filter device 16 through the air vent 25, and the other 70% of the return air enters the heat exchange cavity 8 for heat exchange.

[0042] In this way, by adjusting the opening degree of the fresh air valve at the fresh air opening 12 of the return air chamber 7 and the opening degree of the air valve 26 at the air opening 25 between the return air chamber 7 and the heat exchange chamber 8, the air flow through the air flow channel and the heat exchange chamber and the return air resistance can be adjusted, the indoor positive pressure can be adjusted and maintained, the requirement of the clean air conditioning system for the indoor positive pressure can be met, and the indoor space can be finely adjusted.

[0043] In this embodiment, preferably, the heat exchange module 2 includes a plurality of heat exchange units 3, the plurality of heat exchange units 3 are stacked together from top to bottom, each heat exchange unit 3 includes a heat exchanger 31 and a fan 32, the heat exchanger 31 is connected to an outdoor heat exchanger (not shown in the figure) through a refrigerant connection pipe 4, and the heat exchanger 31 in one or more heat exchange units 3 is connected to the heat exchanger in one outdoor unit 5 through a refrigerant connection pipe 4, forming a fluorine refrigerant circulation loop.

[0044] The plurality of heat exchange units 3 in the heat exchange module 2 are stacked in the heat exchange chamber 8 from top to bottom, the air inlet 34 and the air outlet 35 of each heat exchange unit 3 are respectively communicated with the return air chamber 7 and the supply air chamber 9, and each heat exchange unit 3 is equivalent to a high static pressure indoor ducted air conditioner, that is, a plurality of indoor ducted air conditioners are installed in the heat exchange chamber 8 in a stacked manner from top to bottom. Figure 2 As shown in the figure, in this embodiment, eight heat exchange units 3 are integrated and installed in the heat exchange chamber 8, which is equivalent to eight indoor ducted air conditioners, and the eight heat exchange units 3 are connected to four outdoor units 5, that is, the heat exchangers 31 in every two heat exchange units 3 are connected to one outdoor unit 5 through the refrigerant connection pipe 4.

[0045] In this embodiment, more preferably, each heat exchange unit 3 includes an outer shell 33, the heat exchanger 31 and the fan 32 are installed in the outer shell 33, the air inlet 34 and the air outlet 35 are arranged on the left side plate and the right side plate of the outer shell 33, and are respectively communicated with the return air chamber and the supply air chamber of the air conditioner indoor unit. In this way, the number of stacked heat exchange units 3 can be determined according to the design requirements, and the modular degree is high.

[0046] The structure of the heat exchange module 2 is equivalent to one outdoor unit 5 driving one or more heat exchange units 3, each heat exchange unit 3 plays a role of an air conditioner indoor unit, can be independently adjusted and controlled, is conducive to accurately adjusting the number of heat exchangers 31 and the number and air speed of the fan 32 participating in the refrigeration or heating cycle according to the outdoor environment temperature and indoor load, accurately adjusting the refrigerant amount and air flow participating in the refrigeration or heating cycle, and can realize fine adjustment of indoor temperature and humidity, thereby reducing the energy consumption of the air conditioning system.

[0047] The heat exchange module 2 stacks all the heat exchange units 3 together from top to bottom, the air inlet side and the air outlet side of each heat exchange unit 3 are communicated with the return air chamber and the supply air chamber of the air conditioner indoor unit, which is equivalent to that a plurality of heat exchange units 3 are arranged in parallel on the air flow path from the return air to the supply air, further conducive to fine adjustment of the temperature and humidity of the indoor environment, and makes the overall structure of the heat exchange module 2 more compact, which is equivalent to integrating a plurality of air conditioner indoor units together, occupies small space, and has high integration degree. Moreover, it is conducive to selecting the number of heat exchange units 3 integrated together according to the design needs of the air conditioning system, and has high modularity.

[0048] In the embodiment, further preferably, a damper or other opening and closing mechanism can also be installed at the air inlet 34 or the air outlet 35 of each heat exchange unit 3, for controlling the air inlet 34 and the air outlet 35 of the corresponding heat exchange unit 3 to be communicated or disconnected with the return air chamber and the supply air chamber as needed. The air inlet 34 or the air outlet 35 of the heat exchange unit 3 which does not participate in heat exchange is closed, cutting off the air flow path of the heat exchange unit 3, thereby facilitating accurate control of the heat exchange amount. Further preferably, the damper has a wind volume adjusting function, and the controller adjusts the air flow of each heat exchange unit 3 according to indoor and outdoor temperature and other parameters, thereby further facilitating fine adjustment of the temperature and humidity of the indoor environment.

[0049] In the embodiment, further preferably, the adjacent heat exchange units 3 are separated by a heat insulation material (not shown in the figure), so as to avoid loss caused by the transfer of cold and heat between different heat exchange units 3. A surrounding plate made of heat insulation material is also arranged around the heat exchange module 2, and the heat exchange module 2 is surrounded therein, only the air inlet 34 and the air outlet 35 are communicated with the return air chamber and the supply air chamber. In this way, loss caused by cold and heat can also be avoided. In the embodiment, further preferably, the heat insulation material preferably adopts polyurethane foaming material, which can achieve the heat insulation effect and has light weight.

[0050] In this embodiment, a supply fan 17 is installed in the supply cavity 9, although a fan 32 is installed in each heat exchange unit 3, but its static pressure is small, and the power is low, and it cannot meet the supply pressure requirement of the supply air duct assembly 13. Therefore, a large power supply fan 17 is installed in the supply cavity 9, to improve the static pressure and ensure the supply air volume, so that the air after heat exchange can be sent to the end of the supply air duct assembly 13. In this way, the supply distance can be increased, so that the air conditioner indoor unit 6 can be installed outside the indoor space 1, without being installed inside the indoor space 1, and only the supply air duct assembly 13 and the return air duct assembly 14 need to be installed in the indoor space 1.

[0051] In this embodiment, it is further preferred that a primary filter device 15 is installed on the air inlet side of the heat exchange cavity 8, and a medium-efficiency filter device 16 is installed on the air inlet side of the supply cavity 9. The medium-efficiency filter device 16 preferably adopts a cloth bag type filter device to improve the filtering effect. The primary filter device 15 is arranged on the air inlet side of the ventilation port 25, and the air entering through the ventilation port 25 first passes through the medium-efficiency filter device 16 and then enters the supply cavity 9, to ensure that the return air is effectively filtered before being sent back to the indoor space 1.

[0052] The return air in the indoor space 1 enters the return air cavity 7 through the return air port 10, and the fresh air also enters the return air cavity 7 through the fresh air port 12. After the return air and the fresh air are mixed in the return air cavity 7, they first pass through the primary filter device 15 for filtering, and then pass through the heat exchange module 2 to exchange heat with the heat exchanger 31 in the heat exchange module 2. The air after heat exchange further passes through the medium-efficiency filter device 16 for filtering and then enters the supply cavity 9, and finally is sent to the supply air duct assembly 13 through the supply air port 11. The controller of the air conditioning system determines the number of heat exchangers 31 and the number and speed of the fans 32 to be put into operation according to the temperature and humidity of the indoor space 1 and the outdoor environment, to finely adjust the temperature and humidity of the indoor space 1.

[0053] In this embodiment, it is further preferred that a maintenance cavity 19 is further arranged between the air outlet side of the heat exchange cavity 8 and the medium-efficiency filter device 16. A maintenance door (not shown in the figure) is arranged on the shell 61 of the maintenance cavity 19, to facilitate maintenance personnel to enter the maintenance cavity 19 to perform routine maintenance and repair on the internal components of the air conditioner indoor unit 6.

[0054] In this embodiment, it is further preferred that a humidifying device 18 is further installed in the supply cavity 9. The humidifying device 18 preferably adopts a diaphragm type humidifier, which is connected to a water source through a water pipe. When tap water is supplied to the diaphragm type humidifier, water mist can be generated, which fills the supply cavity 9 and is further sent to the supply air duct assembly 13 through the supply air port 11 and then enters the indoor space 1, to adjust the humidity in the indoor space 1. The humidifying device 18 preferably has a separate control unit on the control panel of the air conditioner indoor unit 6, to facilitate separate control according to the humidity requirement.

[0055] The air conditioning indoor unit 6 is installed outside the indoor space 1, and communicates with the indoor space 1 only through the air supply air duct assembly 13 and the return air air duct assembly 14, avoiding the installation of multiple air conditioning indoor units in the indoor space 1, and not occupying the indoor space. In addition, the multiple heat exchange units 3 in the air conditioning indoor unit are integrated and installed in a shell 61, and share a return air cavity 7 and an air supply cavity 9, a air supply fan 17 and a humidifying device 18, and the same primary filter device 15 and medium filter device 16, so that the air conditioning indoor unit 6 is highly integrated in structure, that is, multiple air conditioning indoor units are integrated and installed in a shell 61, achieving the purpose of energy saving and consumption reduction, and greatly reducing the cost of the air conditioning system.

[0056] Embodiment Two:

[0057] As shown in Figures 1 to 5 , the present embodiment provides a clean air conditioning system, which is a fluorine air conditioning system installed in an indoor space with high air cleanliness requirements, such as a clean workshop, an operating room, etc.

[0058] The clean air conditioning system comprises an outdoor unit 5, an air conditioning indoor unit 6, an air supply air duct assembly 13 and a return air air duct assembly 14. The air conditioning indoor unit 6 adopts the air conditioning indoor unit provided in Embodiment One. The air supply air duct assembly 13 communicates with the air supply cavity 9 of the air conditioning indoor unit 6, and the return air air duct assembly 14 communicates with the return air cavity 7 of the air conditioning indoor unit 6. An indoor air supply port 20 is arranged on the air supply air duct assembly 13 and communicates with the indoor space 1, and an indoor return air port 21 is arranged on the return air air duct assembly 14 and communicates with the indoor space 1.

[0059] In the present embodiment, it is further preferred that the air supply air duct assembly 13 comprises an air supply main air duct 131 and multiple air supply branch air ducts 132. The inlet end of the air supply main air duct 131 is connected with the air supply port 11 of the air conditioning indoor unit 6. The air supply main air duct 131 extends outwards from the air supply port 11 and then divides into two air supply main air ducts 131 after entering the indoor space 1. The two air supply main air ducts 131 extend outwards from the two side wall positions of the top of the indoor space 1, respectively. Multiple air supply branch air ducts 132 are connected to the two air supply main air ducts 131, respectively. The air supply branch air ducts 132 extend downwards from the top along the vertical direction to the bottom of the indoor space 1. The air supply branch air ducts 132 are arranged on the wall or embedded in the wall panel. An indoor air supply port 20 is arranged at the end of each air supply branch air duct 132, and the indoor air supply port 20 is located at the bottom of the indoor space 1. In the present embodiment, 2-4 air supply branch air ducts 132 are connected to each air supply main air duct 131, so as to ensure uniform air supply of the indoor space 1 without air supply dead angle. The air supply air duct assembly 13 is preferably made of 0.75 mm galvanized iron sheet, and a 20 mm thick rubber plastic heat preservation material is pasted inside the galvanized iron sheet.

[0060] In this embodiment, it is further preferred that the return air duct assembly 14 comprises a return air main duct 141 and a plurality of return air branch ducts 142. The return air main duct 141 is led out from the return air inlet 10 into the indoor space 1, and is further divided into two parallel air ducts in the indoor space 1. A plurality of return air branch ducts 142 are arranged on each return air main duct 141 and extend outward from the two sides of the return air main duct 141 in a horizontal direction. The return air main duct 141 and the return air branch ducts 142 are attached to the top wall panel. An indoor return air inlet 21 is arranged at the end of each return air branch duct 142. All indoor return air inlets 21 are located at the top of the indoor space 1. In this embodiment, 8-10 return air branch ducts 142 are arranged on each return air main duct 141, i.e. at least sixteen indoor return air inlets 21 are arranged at the top of the indoor space 1. The return air duct assembly 14 preferably uses 0.75 mm galvanized iron sheet.

[0061] For the installation position of the indoor return air inlet 21, another embodiment is provided in this embodiment. The return air main duct 141 is not attached to the top wall panel of the indoor space 1, but is installed at a specified height range of the indoor space 1 where the temperature and humidity need to be adjusted. For example, in a factory building with high space height, the indoor return air inlet 21 is not arranged at the top of the factory building, but is installed at a certain height in the middle (e.g. the height of the personnel and equipment production area). The temperature and humidity are adjusted only for the space below this height, and the entire space does not need to be disturbed to reduce the temperature. This can appropriately reduce the indoor cooling load and lower the energy consumption.

[0062] In this embodiment, it is further preferred that a damper is added at the indoor return air inlet 21 at the end of the return air duct assembly 14 to adjust the return air volume, i.e. to adjust the supply and return air volume to maintain the positive pressure state of the indoor space 1.

[0063] The air conditioning system adopts a wind circulation mode of supplying air from below and returning air from above. The cold air and hot air after heat exchange with the internal heat exchanger 31 of the heat exchange module 2 are delivered to the indoor supply air inlets 20 at the bottom of the indoor space 1 through the supply air duct assembly 13. The cold air and hot air are delivered close to the ground during cooling and heating, and are then sucked in through the indoor return air inlets 21 at the top. This can form a temperature gradient from bottom to top, and achieve the required temperature in the specified height range of the indoor space.

[0064] The indoor supply air inlet 20 at the end of each supply air branch duct 132 can be directly arranged on the front side panel at the end of the supply air branch duct 132, and a mesh panel is installed at the indoor supply air inlet 20. In this embodiment, the indoor supply air inlet 20 is arranged on the front side panel of the supply air branch duct 132, and a mesh panel is installed at the indoor supply air inlet 20. Figure 1 and Figure 5As shown, preferably, each indoor air supply outlet 20 at the end of each air supply branch duct 132 adopts a floor-standing structure, and the indoor air supply outlet 20 is not directly arranged on the air supply branch duct 132, but is arranged on the side plate of the air supply branch duct 132 and horizontally extends to one side to be provided with an end air supply duct 22. The end air supply duct 22 is in communication with the air supply branch duct 132, and the end air supply duct 22 can adopt a square cross-section structure or a circular cross-section structure. The end air supply duct 22 can be arranged on the wall or embedded in the wall panel. The indoor air supply outlet 20 is arranged on the front side plate of the end air supply duct 22, and a mesh plate 23 is further preferably arranged at the indoor air supply outlet 20. The mesh plate 23 preferably adopts a stainless steel mesh plate. In this embodiment, the mesh plate 23 further preferably covers the front side plate of the end air supply duct 22. Air enters the end air supply duct 22 from the air supply branch duct 132 and is discharged through the mesh plate 23. By using this air supply structure, the air supply wind speed of the indoor air supply outlet 20 can be effectively reduced, and there is no strong blowing feeling, and the body feeling is more comfortable. Moreover, under the condition of the same air supply volume, the air supply area can be greatly increased, the air supply coverage area is larger, and the air supply is more uniform.

[0065] The indoor air supply outlet 20 is made of a mesh plate, and the air supply wind speed of the indoor air supply outlet 20 can be reduced to about 0.5 m / s, and the air supply is more uniform. Cold air forms a layer of “lake” close to the ground, and a temperature gradient is formed from bottom to top, so that the temperature requirements of the personnel and equipment production area are met. Because the temperature at the top of the room is high, and because of the air flow direction, indoor pollutants are also beneficial to be gathered to the top of the room and discharged, so as to achieve the purpose of reducing indoor load.

[0066] For the structure of the end air supply duct 22 arranged on the wall, a detachable cover plate 24 is preferably arranged above the end air supply duct 22 to facilitate daily maintenance and repair. For the structure of the end air supply duct 22 embedded in the wall panel, the mesh plate 23 preferably adopts a detachable structure to facilitate daily maintenance and repair.

[0067] In this embodiment, it is further preferred that a clean module (not shown in the figure) for purifying air is arranged at the inlet end of the air supply duct assembly 13 (i.e., the end of the air supply main duct 131 connected with the air supply outlet 11). The clean module is used to purify the air supplied into the indoor space, and to improve the cleanliness and comfort of the air in the indoor space. In this way, the traditional fluorine air conditioning system can be used as a clean air conditioning system, and can be used in places with high cleanliness requirements, such as clean workshops.

[0068] In the embodiment, further preferably, the clean module is detachably installed between the air supply port 11 of the air conditioner indoor unit 6 and the inlet end of the air supply main air duct 131, i.e., the clean module is a section of the air supply main air duct 131, so that the user can conveniently increase or decrease the clean module according to actual needs, and meet the individualized use requirements of different customers.

[0069] In addition, since the air conditioning system adopts the lower air supply and upper air return mode, the pollutants in the indoor space 1 are more likely to accumulate in the upper part of the indoor space 1, i.e., the pollutants are more likely to enter the air return duct assembly 14 from the top indoor air return port 21, pass through the clean module after heat exchange, so that the indoor pollutants can all be purified by the clean module, and the cleanliness of the indoor environment is more improved.

[0070] In the embodiment, further preferably, the clean module has a shell (not marked in the figure), and connecting flanges are arranged on both sides of the shell, and flanges are also arranged on the air supply port 11 and the inlet end of the air supply main air duct 131, and the two ends of the clean module are connected with the air supply port 11 and the inlet end of the air supply main air duct 131 through the flanges.

[0071] In order to reduce the difficulty of on-site assembly, it is further preferred that the air supply port 11 and the clean module are connected through a soft connection, i.e., a small section of soft connection pipeline (not shown in the figure) is arranged, and connecting flanges are arranged on both ends of the soft connection pipeline and are fixedly connected with the shell of the clean module and the inlet end of the air supply main air duct 131, so that the connecting flanges are conveniently aligned during on-site assembly, and the connection efficiency is improved.

[0072] In the embodiment, the clean module includes one or more functional modules of an electrostatic dust removal device, a high-efficiency filter, and a ultraviolet sterilization device, and the plurality of functional modules are sequentially installed inside the clean module shell along the gas flow direction. The user can select one or more functional modules according to actual needs to meet the purification, filtration, sterilization, and other functions.

[0073] In the embodiment, further, in order to facilitate the installation of the plurality of functional modules, a plurality of installation sockets (not shown in the figure) are arranged on the side plate of the shell, different functional modules are inserted into different installation sockets for installation, and when the functional module is not inserted, the installation socket is plugged with a sealing plate.

[0074] As Figure 1As shown, in the embodiment, the air conditioning system is provided with four outdoor units 5, and the heat exchange module 2 includes eight heat exchange units 3, the heat exchanger 31 of each two heat exchange units 3 is connected with the outdoor unit 5 through the refrigerant connecting pipe to form four complete fluorine circulation systems. The compressor, condensing fan and the like are installed in each outdoor unit 5, and the condensing fan is installed above the top plate of the outdoor unit 5. The outdoor unit 5 adopts the VRV outdoor unit, and the refrigerant flow rate delivered to the heat exchanger 31 is controlled according to the control logic, so as to realize the cold and heat output requirements of different spaces.

[0075] The clean air conditioning system adopts the air circulation mode of downward air supply and upward air return, and the cold air and the hot air after heat exchange with the heat exchanger 31 in the heat exchange module 2 are sent out through the indoor air supply port 20 located at the bottom of the indoor space 1, so that the cold air and the hot air are sent out close to the ground during refrigeration and heating, and are then sucked into the indoor air return port 21 at the top, so that the gradient is formed in the different height ranges of the whole space, the required temperature is reached in the specified height range of the indoor space, and only the required personnel activity space needs to be ensured, and the whole space does not need to be disturbed to reduce the temperature, the indoor cooling load can be appropriately reduced, the energy consumption is reduced, and the system is more energy-saving.

[0076] Compared with the traditional form of clean air conditioning water system, the clean air conditioning system uses freon as the refrigerant, the refrigeration effect is more rapid and more energy-saving, the indoor air blowing feeling is weaker and more comfortable, and the indoor temperature can be more finely adjusted. Moreover, by additionally installing the clean module, the indoor space can meet the clean requirement.

[0077] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as the above preferred embodiment, it is not intended to limit the present application, and any person skilled in the art can make some changes or modifications to the above-mentioned technical content without departing from the technical solution of the present application, and the equivalent embodiments with equivalent changes are equivalent. The implementation solutions in the above embodiments can be further combined or replaced, as long as they do not deviate from the technical solution of the present application, and any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application are still within the scope of the present application.

Claims

1. An air conditioner indoor unit, characterized by comprising: The air conditioner indoor unit comprises a shell, a return air cavity, a heat exchange cavity and a supply air cavity are partitioned in the shell, a return air inlet and a fresh air inlet are formed on the shell of the return air cavity, a supply air inlet is formed on the shell of the supply air cavity, a supply air fan is installed in the supply air cavity, a heat exchange module is installed in the heat exchange cavity, the air inlet and the air outlet of the heat exchange module are communicated with the return air cavity and the supply air cavity respectively, an adjustable fresh air valve is installed at the fresh air inlet, an air flow channel directly connecting the return air cavity and the supply air cavity is arranged in the shell, and an adjustable air valve is installed on the air flow channel. 2.The indoor unit of the air conditioner according to claim 1, characterized by: The heat exchange cavity is surrounded by a surrounding plate in the shell, the space between the surrounding plate and the shell forms the air flow channel, the surrounding plate extends outwardly from the heat exchange cavity and is connected with the shell, a ventilation inlet is formed on the extended surrounding plate corresponding to the air flow channel, and the air valve is installed at the ventilation inlet. 3.The indoor unit of the air conditioner according to claim 1, characterized by: The heat exchange module comprises a plurality of heat exchange units which are stacked together from top to bottom, each of the heat exchange units comprises a heat exchanger and a fan, and the heat exchanger is connected with an outdoor heat exchanger through a refrigerant connecting pipe. 4.The indoor unit of the air conditioner according to claim 3, characterized by: Each of the heat exchange units comprises an outer shell, the heat exchanger and the fan are installed in the outer shell, and an air inlet and an air outlet are arranged on the outer shell. 5.The indoor unit of the air conditioner according to claim 1, characterized by: A primary filter device is installed at the air inlet side of the heat exchange cavity, and a medium filter device is installed at the air inlet side of the supply air cavity. 6.The indoor unit of the air conditioner according to claim 5, characterized in that: A maintenance cavity is further arranged between the air outlet side of the heat exchange cavity and the medium filter device, and a maintenance door is formed on the shell of the maintenance cavity. 7.The indoor unit of the air conditioner according to claim 1, characterized by: A humidifying device is installed in the supply air cavity. 8.The indoor unit of an air conditioner according to any one of claims 1-7, characterized by: The air conditioner indoor unit is installed outside the indoor space which needs to be controlled in temperature.

9. A clean air conditioning system characterized by: The air conditioner comprises an outdoor unit, an indoor unit, a supply air duct assembly and a return air duct assembly, the indoor unit is the air conditioner indoor unit according to any one of claims 1-8, the supply air duct assembly is communicated with the supply air cavity, the return air duct assembly is communicated with the return air cavity, an indoor supply air inlet communicated with the indoor space is arranged on the supply air duct assembly, and an indoor return air inlet communicated with the indoor space is arranged on the return air duct assembly.

10. The clean air conditioning system of claim 9, wherein: A clean module for purifying air is arranged at the inlet end of the supply air duct assembly communicated with the supply air cavity.

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