Air conditioning unit

Abstract

The application relates to an air conditioning unit, comprising: a mixed air assembly, comprising a baffle and a support pipe, the baffle being arranged between an air inlet end and an air outlet end of the mixed air assembly; the support pipe being arranged at the air inlet end, the support pipe being provided with a nozzle, the nozzle being directed towards the air outlet end; a primary air assembly configured to provide primary air and make the primary air enter the mixed air assembly from the air inlet end; and a secondary air assembly in communication with the support pipe and configured to provide secondary air to the support pipe; wherein the baffle is configured to make the primary air and the secondary air in the mixed air assembly collide and mix, and flow out from the air outlet end. The secondary air and the primary air are affected by the baffle in the mixed air assembly, and are repeatedly turned back, collided and mixed, so that the mixing uniformity of the primary air and the secondary air is improved, the temperature of the mixed primary air and secondary air is close to the supply air temperature, and the problem that the supply air temperature of the air conditioner is greatly different from the indoor temperature is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of central air conditioning, and in particular to an air conditioning unit. BACKGROUND

[0002] A combined air conditioning box is used in a constant temperature and humidity factory to regulate and control the temperature and humidity of a controlled area throughout the year. The combined air conditioning box usually adopts a process flow of once returning air, exhausting air, and then supplementing fresh air, and then performing heat and humidity treatment. In high temperature and humidity seasons such as summer, the air needs to be dehumidified at low temperature by the cooling coil to reduce the humidity of the supply air of the combined air conditioning box. After low-temperature dehumidification, the supply air temperature may be too low, and heat energy needs to be consumed for reheating; or because the supply air temperature is too low, the human body feels too cold, and water droplets condense and drop from the frame of the supply air outlet. SUMMARY

[0003] Some embodiments of the present application propose an air conditioning unit for reducing the problem that the supply air temperature of the air conditioner is greatly different from the indoor temperature.

[0004] In one aspect of the present application, an air conditioning unit is provided, comprising:

[0005] A mixing assembly, comprising a baffle and a support pipe, the baffle being arranged between an air inlet end and an air outlet end of the mixing assembly; the support pipe being arranged at the air inlet end, the support pipe being provided with a nozzle, the nozzle being directed towards the air outlet end;

[0006] A primary air assembly configured to provide primary air and to cause the primary air to enter the mixing assembly from the air inlet end; and

[0007] A secondary air assembly in communication with the support pipe and configured to provide secondary air to the support pipe;

[0008] Wherein the baffle is configured to cause the primary air and the secondary air in the mixing assembly to collide and mix, and to flow out from the air outlet end.

[0009] In some embodiments, the number of baffles is at least two, and the support pipe is connected with the at least two baffles to fix and support the at least two baffles.

[0010] In some embodiments, the baffle comprises a plurality of curved panels, the plurality of curved panels being spliced with each other, and an included angle between two adjacent curved panels being greater than zero.

[0011] In some embodiments, the size of the included angle between the two adjacent curved panels is adjustable.

[0012] In some embodiments, the nozzle is configured to cause the airflow passing through the nozzle to rotate and flow.

[0013] In some embodiments, the windward face of the support tube facing the primary air is configured as an arc-shaped face, and the cavity downstream of the arc-shaped face is configured as a rectangular cavity.

[0014] In some embodiments, the nozzle is arranged on the wall surface of the rectangular cavity close to the air outlet end.

[0015] In some embodiments, the number of the support tubes is at least two, and the at least two support tubes are arranged in an up-down interval, and each support tube extends laterally.

[0016] In some embodiments, the primary air assembly comprises:

[0017] a heat exchanger configured to adjust the temperature and humidity of the air flow flowing therethrough; and a primary air duct communicating the outlet of the heat exchanger and the air inlet end of the air mixing assembly.

[0018] In some embodiments, the secondary air assembly comprises:

[0019] a secondary air duct communicating with the support tube; and

[0020] a first air valve arranged in the secondary air duct and configured to control the on-off and flow rate of the secondary air duct.

[0021] In some embodiments, the air conditioning unit further comprises a mixed air duct configured to transport mixed air of fresh air and return air, and the mixed air duct is connected with the primary air assembly and the secondary air assembly, respectively.

[0022] In some embodiments, the air conditioning unit further comprises an air supply assembly communicating with the air outlet end of the air mixing assembly and configured to send the air flow discharged from the air outlet end of the air mixing assembly to the indoor.

[0023] Based on the above technical solutions, the present application has at least the following beneficial effects:

[0024] In some embodiments, the primary air enters the air mixing assembly from the air inlet end of the air mixing assembly, and the secondary air is sprayed into the air mixing assembly through the nozzle on the support tube of the air inlet end of the air mixing assembly, the nozzle faces the air outlet end, and the secondary air is sprayed forward along the air flow of the primary air, the primary air and the secondary air are affected by the baffle in the air mixing assembly, and are mixed multiple times, thereby improving the mixing uniformity of the primary air and the secondary air, and the temperature of the mixed primary air and secondary air is close to the supply air temperature, thereby reducing the problem that the supply air temperature of the air conditioner is greatly different from the indoor temperature. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0026] Figure 1 A schematic view of an air conditioning unit according to some embodiments of the application;

[0027] Figure 2 A top view of a mixing assembly according to some embodiments of the application;

[0028] Figure 3 A partial enlarged view of a baffle according to some embodiments of the application;

[0029] Figure 4 A side view of a mixing assembly according to some embodiments of the application;

[0030] Figure 5 A cross-sectional view of a support tube according to some embodiments of the application.

[0031] The reference signs in the drawings correspond as follows:

[0032] 1 - primary air assembly; 11 - primary air duct; 12 - heat exchanger;

[0033] 2 - secondary air assembly; 21 - secondary air duct; 22 - first air valve;

[0034] 3 - mixing assembly; 31 - baffle; 31 A - first curved panel; 31 B - second curved panel; 31 C - third curved panel; 31 D - fourth curved panel; 311 - first flap; 312 - second flap; 313 - third flap; 312' - second flap of another baffle; 32 - support tube; 321 - arc-shaped surface; 322 - rectangular cavity; 33 - nozzle; 34 - air inlet end; 35 - air outlet end; 36 - frame; 37 - support rod;

[0035] 4 - mixed air duct;

[0036] 5 - supply air assembly; 51 - temperature and humidity detecting element; 52 - heater; 53 - humidifier; 54 - supply air fan; 55 - second air valve;

[0037] 61 - filter; 62 - third air valve; 63 - fourth air valve; 64 - fifth air valve; 65 - sixth air valve; 66 - return air fan; 67 - first partition; 68 - second partition.

[0038] It should be understood that the dimensions of the various portions shown in the drawings are not necessarily drawn to scale. In addition, the same or similar reference numerals are used to denote like or similar components throughout the several views. DETAILED DESCRIPTION

[0039] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is only meant to be illustrative and not limiting of the present application. The present application can be carried out in many different ways, not just the ways specifically set forth herein below. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. It should be noted that the relative arrangement of components and steps, the numerical expressions, and the numerical values set forth in these embodiments are to be interpreted as merely exemplary and not limiting.

[0040] The terms "first", "second", and similar terms in the present application do not denote any order, quantity, or importance, but are used to distinguish different parts. The terms "include", "comprise", and similar terms mean that the elements before the terms encompass the elements listed after the terms, and do not exclude the possibility of also encompassing other elements. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly.

[0041] In the present application, when it is described that a specific device is located between a first device and a second device, there can be an intervening device between the specific device and the first device or the second device, or there can be no intervening device. When it is described that a specific device is connected to other devices, the specific device can be directly connected to the other devices without an intervening device, or can not be directly connected to the other devices with an intervening device.

[0042] All terms used in the present application, including technical or scientific terms, have the same meanings as those understood by those skilled in the art to which the present application pertains, unless otherwise defined specifically. It should also be noted that the terms defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically so defined herein.

[0043] Techniques, methods, and apparatuses known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the specification where appropriate.

[0044] In a high-temperature and high-humidity season such as summer, outdoor fresh air needs to be dehumidified at low temperature and then sent into a room. A lower supply air temperature can cause an over-cooling of a controlled area, or a human body can feel over-cooling due to a too low supply air temperature, and water droplets can condense and drop from a frame of a supply air outlet.

[0045] Based on this, the outdoor fresh air is mixed with the indoor return air and sent into the indoor after heat and humidity treatment, which can utilize the return air to reduce the temperature of the fresh air, realize the dehumidification of the fresh air, and alleviate the problem of the need for re-heating due to the excessive reduction of the temperature of the fresh air.

[0046] After the mixing of the fresh air and the return air, part of the air is used as primary air to pass through the heat exchanger to adjust the temperature and humidity, and the other part is used as secondary air to pass through the heat exchanger to adjust the temperature and humidity, and then the primary air and the secondary air are mixed to better control the temperature and humidity of the air sent into the indoor.

[0047] To improve the uniformity of the mixing of the primary air and the secondary air, the air conditioning unit provided by the embodiments of the present application is used to improve the uniformity of the mixing of the primary air and the secondary air, and alleviate the problem of the large difference between the air supply temperature of the air conditioner and the indoor temperature.

[0048] Figure 1 is a structural schematic diagram of some embodiments of the air conditioning unit according to the present application. Referring to Figure 1 In some embodiments, the air conditioning unit includes a mixed air assembly 3, a primary air assembly 1 and a secondary air assembly 2.

[0049] Referring to Figure 2 and Figure 3 , the mixed air assembly 3 includes a baffle 31 and a support pipe 32, the baffle 31 is arranged between the air inlet end 34 and the air outlet end 35 of the mixed air assembly 3, and the support pipe 32 is arranged at the air inlet end 34, the support pipe 32 is provided with a nozzle 33, and the nozzle 33 faces the air outlet end 35.

[0050] The support pipe 32 is a pipe with a ventilation cavity inside.

[0051] The air outlet end 35 is provided with a support rod 37, and the support rod 37 is used to fix the baffle 31.

[0052] The primary air assembly 1 is configured to provide primary air, and the primary air enters the mixed air assembly 3 from the air inlet end 34.

[0053] The secondary air assembly 2 is in communication with the support pipe 32, and is configured to provide secondary air to the support pipe 32.

[0054] Among them, the baffle 31 is configured to cause the primary air and the secondary air in the mixed air assembly 3 to collide and mix, and flow out from the air outlet end 35.

[0055] The primary air enters the air mixing assembly 3 from the air inlet end 34 of the air mixing assembly 3, and the secondary air is sprayed into the air mixing assembly 3 through the nozzles 33 on the support pipe 32 of the air inlet end 34 of the air mixing assembly 3, the nozzles 33 are directed towards the air outlet end 35, the secondary air is sprayed along the airflow of the primary air through the nozzles 33, and the primary air and the secondary air are repeatedly folded, collided and mixed in the air mixing assembly 3 under the action of the baffle 31, thereby improving the mixing uniformity of the primary air and the secondary air, and the temperature of the mixed primary air and secondary air is close to the temperature of the air supply chamber, thereby reducing the problem that the temperature difference between the air supply temperature of the air conditioner and the indoor temperature is large.

[0056] Furthermore, due to the blocking of the support pipe 32 to the primary air flow, the position of the nozzle 33 is in a local low pressure area, which facilitates the spraying of the secondary air flow. Moreover, the primary air flows into the air mixing assembly 3 through the support pipe 32, which also has a flow guiding effect on the secondary air.

[0057] In some embodiments, the secondary air assembly 2 communicates with the end of the support pipe 32. Alternatively, the secondary air assembly 2 can communicate with any region between the two ends of the support pipe 32.

[0058] In some embodiments, the support pipe 32 comprises a steel pipe or a rigid plastic pipe.

[0059] In some embodiments, the air conditioning unit further comprises a mixed air duct 4 configured to transport mixed air of fresh air and return air, the mixed air duct 4 is connected with the primary air assembly 1 and the secondary air assembly 2 respectively.

[0060] The fresh air is outdoor fresh air, and the return air is indoor return air. Part of the mixed air of the fresh air and the return air enters the primary air assembly 1 as primary air, and part of the mixed air enters the secondary air assembly 2 as secondary air. The primary air of the primary air assembly 1 enters the air mixing assembly 3 from the air inlet end 34 of the air mixing assembly 3, and the secondary air of the secondary air assembly 2 is sprayed into the air mixing assembly 3 through the nozzles 33 on the support pipe 32 of the air inlet end 34 of the air mixing assembly 3, and the secondary air and the primary air are repeatedly folded, collided and mixed in the air mixing assembly 3 under the action of the baffle 31, thereby improving the mixing uniformity of the primary air and the secondary air.

[0061] In some embodiments, the primary air assembly 1 comprises a heat exchanger 12 and a primary air duct 11.

[0062] The heat exchanger 12 is configured to adjust the temperature and humidity of the airflow flowing therethrough.

[0063] The primary air duct 11 communicates the outlet of the heat exchanger 12 with the air inlet end 34 of the air mixing assembly 3.

[0064] In some embodiments, the heat exchanger 12 comprises a surface cooler.

[0065] In some embodiments, the secondary air assembly 2 comprises a secondary air duct 21 and a first air valve 22.

[0066] The secondary air duct 21 is in communication with the support pipe 32, and the secondary air duct 21 is configured to provide secondary air to the support pipe 32.

[0067] The first air valve 22 is arranged on the secondary air duct 21, and the first air valve 22 is configured to control the on-off and flow of the secondary air duct 21.

[0068] The first air valve 22 is arranged on the secondary air duct 21, and the opening degree of the first air valve 22 can be adjusted to adjust the air volume of the secondary air in the secondary air duct 21.

[0069] The primary air passes through the heat exchanger 12, and the air pressure loss is large. The secondary air does not pass through the heat exchanger 12, but passes through the first air valve 22 and the secondary air duct 21 to the support pipe 32, and is sprayed from the nozzle 33 arranged on the support pipe 32. Therefore, the air resistance in the primary air assembly 1 is large, the air resistance in the secondary air assembly 2 is small, and the air pressure loss of the secondary air is smaller than that of the primary air. By adjusting the opening degree of the first air valve 22, the primary air and the secondary air can be mixed in a required proportion without additional power consumption.

[0070] In some embodiments, the number of baffles 31 is at least two, and the support pipe 32 is connected with the at least two baffles 31 to fix and support the at least two baffles 31.

[0071] The support pipe 32 can not only transport secondary air, but also support and fix the baffles 31, so that the structure of the air mixing assembly 3 is simple and compact.

[0072] In some embodiments, the baffle 31 comprises a plurality of curved panels, and the plurality of curved panels are spliced with each other and have an included angle greater than zero between adjacent two curved panels.

[0073] The baffle 31 forms an air duct in the air mixing assembly 3, the baffle 31 comprises a plurality of curved panels, the plurality of curved panels are spliced with each other and have an included angle greater than zero between adjacent two curved panels, the primary air and the secondary air flow through the air duct, and pass through the bending part formed between the plurality of curved panels, so that the primary air and the secondary air are fully bent, collided and mixed, and the uniformity of the mixing of the primary air and the secondary air is improved.

[0074] The baffle 31 can be designed with a plurality of curved panels as required, so that the mixing uniformity of the primary air and the secondary air meets the requirements. The plurality of curved panels can also improve the water blocking effect of the baffle 31 on the condensate water of the surface air cooler.

[0075] In some embodiments, the material of the baffle 31 can include stainless steel, aluminum alloy or plastic, etc.

[0076] In some embodiments, a plurality of baffles 31 are arranged in the air mixing assembly 3 along the direction from the air inlet end 34 to the air outlet end 35.

[0077] In some embodiments, the baffles 31 comprise a plurality of curved panels connected to each other, so as to increase the tortuosity of the flow channel in the air mixing assembly 3. The included angle between two adjacent curved panels can be adjusted, and the included angle between the curved panels affects the flow channel area in the air mixing assembly 3. In actual operation, the included angle between two adjacent curved panels can be adjusted according to the operating state of the air handling unit, so as to adjust the flow channel area in the air mixing assembly 3, and achieve the purpose of adjusting the mixing uniformity of the mixed air.

[0078] Reference Figure 3 In some embodiments, the baffles 31 are continuously connected by a plurality of curved panels, for example, the baffle 31 is continuously connected by a first curved panel 31A, a second curved panel 31B, a third curved panel 31C and a fourth curved panel 31D. The connection angle of adjacent curved panels can be adjusted as needed. A strip-shaped folding plate is installed at the connection gap. For example, the baffle 31 continuously connected by four curved panels has three connection gaps along the air supply direction, and three strip-shaped folding plates are installed, which are first folding plate 311, second folding plate 312 and third folding plate 313.

[0079] The first curved panel 31A is fixed to the support pipe 32, and the fourth curved panel 31D is fixed to the support rod 37. The support pipe 32 is connected to the secondary air duct 21 and is fixedly installed and does not displace. The support rod 37 only serves to fix the fourth curved panel 31D and can displace forward and backward in the direction of the mixed air flow. The connection between the curved panels is a hinge connection, and through the support rod 37, the connection angle of the first curved panel 31A-second curved panel 31B, second curved panel 31B-third curved panel 31C and third curved panel 31C-fourth curved panel 31D can be adjusted as needed.

[0080] The folding plates are fixedly connected, wherein the first folding plate 311 is fixed to the first curved panel 31A, the third folding plate 313 is fixed to the fourth curved panel 31D, and the second folding plate 312 is fixed to the hinge connecting the second curved panel 31B and the third curved panel 31C.

[0081] And along the air flow direction, in the two adjacent baffles 31, the folding plate of one of the baffles 31 is embedded in the line connecting the two folding plates of the other baffle 31, for example, the second folding plate 312' on the other baffle 31 extends between the first folding plate 311 and the third folding plate 313 of the adjacent baffle 31; so that the air mixing in the air mixing assembly 3 does not pass straight through, but is mixed by the baffling.

[0082] On the upper top plate of the air conditioner box above the second folding plate 312, a plurality of guide rails are designed, which can guide the running track of the second folding plate 312 when the push-pull support rod 37 is pushed.

[0083] According to the needs, the bending angle between each curved panel constituting the baffle 31 is changed by the support rod 37. Referring to Figure 2 If the support rod 37 is pushed to the left, the bending angle of each curved panel becomes smaller, the mixed air flow channel between each baffle 31 becomes narrower, and the flow rate increases. Moreover, the bending angle becomes smaller, and the air turning angle becomes larger, which can make the mixing of the mixed air more intense and sufficient. However, the running resistance of the mixed air becomes larger, which can increase the pressure loss of the mixed air and the operating energy consumption of the air conditioner box. Conversely, if the support rod 37 is pulled to the right, the bending angle between each curved panel becomes larger, the mixed air flow channel between each baffle 31 becomes wider, and the flow rate decreases. Moreover, the bending angle becomes larger, and the air turning angle becomes smaller, which can make the mixing of the mixed air more gentle. However, the running resistance of the mixed air becomes smaller, which can reduce the pressure loss of the mixed air and the operating energy consumption of the air conditioner box. Therefore, according to the operating conditions of the air conditioner box, the mixed air uniformity can be adjusted by pushing and pulling the support rod 37.

[0084] In some embodiments, the nozzle 33 is configured to make the airflow sprayed through it rotate. The nozzle 33 has a cyclone function, and the spray angle and spray air volume of the nozzle 33 can be adjusted according to needs.

[0085] Referring to Figure 4 In some embodiments, the windward surface of the support pipe 32 facing the primary air is constructed as an arc surface 321, and the cavity downstream of the support pipe 32 located on the arc surface 321 is constructed as a rectangular cavity 322.

[0086] The windward surface of the support pipe 32 facing the primary air is constructed as an arc surface 321, which can reduce the wind resistance to the primary air. The rectangular cavity 322 is arranged downstream of the arc surface 321, which can expand the airflow passage area inside the support pipe 32 and reduce the movement resistance of the secondary air.

[0087] In some embodiments, the nozzle 33 is arranged on the wall surface of the rectangular cavity 322 close to the air outlet end 35.

[0088] The nozzle 33 is installed on the leeward surface of the support pipe 32. Since there is a local low-pressure area on the leeward surface, it is convenient for the secondary air flow to be sprayed out, and the high-speed primary air flow flowing through both sides of the support pipe 32 has a flow guiding effect on the secondary air flow after the nozzle 33.

[0089] Referring to Figure 4 In some embodiments, the number of support pipes 32 is at least two, the at least two support pipes 32 are arranged in an up-down interval, and each support pipe 32 extends horizontally.

[0090] The at least two support pipes 32 are arranged in an up-down interval manner to fix and connect the baffle 31 in the mixing assembly 3, and support the baffle 31.

[0091] The mixing assembly 3 comprises a frame 36 supporting and connecting the baffle 31, wherein the secondary air duct 21 can be arranged at one side of the frame 36 to assist the frame 36 in supporting and fixing the baffle 31.

[0092] The part of the secondary air duct 21 connecting the support pipe 32 can be a part of the frame 36.

[0093] The support pipe 32 can be accessed through the side of the baffle 31.

[0094] In some embodiments, the air conditioning unit further comprises an air supply assembly 5 communicating with the air outlet end 35 of the mixing assembly 3, and the air supply assembly 5 is configured to send the air flow discharged from the air outlet end 35 of the mixing assembly 3 to the indoor.

[0095] In some embodiments, the air supply assembly 5 comprises a plurality of temperature and humidity detection elements 51 arranged in the same cross section. By comparing the detection values of the respective temperature and humidity detection elements 51, the mixing uniformity of the mixed air can be obtained. Meanwhile, the detection values of the respective temperature and humidity detection elements 51 are aggregated and processed, for example, by taking an average value, to serve as the output of the entire temperature and humidity detection element 51.

[0096] The temperature and humidity detection element 51 is used to detect the temperature and humidity of the mixed air discharged from the air outlet end 35 of the mixing assembly 3.

[0097] In some embodiments, the air supply assembly 5 further comprises a heater 52 and a humidifier 53, and the working states of the heater 52 and the humidifier 53 are controlled according to the temperature and humidity of the mixed air detected by the temperature and humidity detection element 51.

[0098] In some embodiments, the air supply assembly 5 further comprises an air supply fan 54, which is used to send the mixed air with adjusted temperature and humidity by the heater 52 and the humidifier 53 to the indoor.

[0099] In some embodiments, the air supply assembly 5 further comprises a second air valve 55 arranged at the air supply outlet of the air conditioning unit, and the second air valve 55 is used to control the opening and closing of the air supply outlet and the size of the opening.

[0100] In some embodiments, the air conditioning unit further comprises a controller electrically connected to the temperature and humidity detection element 51, the heater 52 and the humidifier 53, and the controller is configured to receive the temperature and humidity of the mixed air detected by the temperature and humidity detection element 51 and control the working states of the heater 52 and the humidifier 53.

[0101] In the temperature and humidity detection, if the temperature and humidity value deviation is large, it will cause the subsequent heating control distortion, therefore, the mixing uniformity of the primary air and the secondary air, and the mixing ratio of the primary air and the secondary air need to be improved.

[0102] The controller is further connected with the first air valve 22, and the controller is configured to control the opening degree of the first air valve 22 to adjust the mixing ratio of the secondary air and the primary air, so that the mixed air temperature of the primary air and the secondary air is close to the room temperature, and the problem that the air supply temperature of the air conditioner is greatly different from the indoor temperature is reduced.

[0103] In some embodiments, the controller includes a PLC controller.

[0104] In some embodiments, the first air valve 22 and the second air valve 55 include electric valves.

[0105] After the primary air and the secondary air are mixed, the temperature and humidity detection element 51 is installed, which is used to detect the temperature and humidity value of the air, and is used to guide the reheating of the heater 52. Through the uniform mixing of the primary air and the secondary air and the correct control of the control system, the reheating of the heater 52 tends to zero.

[0106] In some embodiments, the heat exchanger 12 and the frame 36 of the air mixing assembly 3 are well sealed with the inner wall of the cabinet of the air conditioning unit, so as to prevent the air in the mixed air duct 4 from leaking out through the gap between the frame and the inner wall of the cabinet of the air conditioning unit, and reduce the adjustment and control effect of the system.

[0107] In some embodiments, the air conditioning unit further comprises a filter 61, and the mixed air of the fresh air and the return air passes through the filter 61 before entering the mixed air duct 4.

[0108] In some embodiments, the air conditioning unit further comprises a third air valve 62, a fourth air valve 63, a fifth air valve 64, a sixth air valve 65 and a return air fan 66.

[0109] The air conditioning cabinet is provided with a return air section, an exhaust air section, a fresh air section, a filter section, a surface cooling section, a heating section, a humidifying section and an air supply section in sequence along the air treatment flow direction.

[0110] The return air fan 66 is installed in the return air section.

[0111] The first partition plate 67 is arranged between the return air section and the exhaust air section, and the second partition plate 68 is arranged between the exhaust air section and the fresh air section.

[0112] The third air valve 62 is arranged on the top plate of the air conditioning cabinet in the return air section of the air conditioning cabinet, and is used to control the on-off of the return air duct and the flow of the return air in the return air duct.

[0113] The fourth air valve 63 is arranged on the top plate of the air conditioning cabinet after the exhaust air section, and is used to exhaust part of the contaminated air in the controlled environment.

[0114] The fifth air valve 64 is a mixing air valve, which is arranged on the second partition plate 68 between the exhaust air section and the fresh air section.

[0115] By controlling the opening degrees of the fourth air valve 63 and the fifth air valve 64, the air conditioning exhaust function is realized. For example, in the case of opening the fourth air valve 63 and closing the fifth air valve 64, more return air can be exhausted through the fourth air valve 63.

[0116] The sixth air valve 65 is arranged in the fresh air duct, which is used to control the on-off of the fresh air duct and the flow of fresh air in the fresh air duct.

[0117] In some embodiments of the present application, the primary air enters the mixing assembly 3 from the air inlet end 34, and the secondary air is sprayed into the mixing assembly 3 through the nozzles 33 on the support pipe 32 of the air inlet end 34 of the mixing assembly 3, the nozzles 33 are directed towards the air outlet end 35, the secondary air is sprayed forward along the airflow of the primary air through the nozzles 33, and the secondary air and the primary air are affected by the baffle 31 in the mixing assembly 3, multiple times of turning back, colliding and mixing, which improves the mixing uniformity of the primary air and the secondary air, and the first air valve 22 is arranged on the secondary air duct 21, by adjusting the opening degree of the first air valve 22, the air volume of the secondary air in the secondary air duct 21 can be adjusted, and by adjusting the opening degree of the first air valve 22, the primary air and the secondary air can be mixed in the required proportion without additional power consumption. The temperature and humidity detection element 51 is arranged downstream of the mixing assembly 3, the temperature and humidity detection element 51 can accurately measure the temperature and humidity values of the mixed air, guide the work of the heater, and improve the controllability of the air temperature and humidity adjustment after mixing, and by adjusting the control system, the reheating of the air conditioning unit and the overall operation energy consumption of the air conditioning unit are reduced.

[0118] Some specific embodiments of the air conditioning unit will be described in detail below with reference to the accompanying drawings. Figures 1 to 4

[0119] As shown in FIG. 1, the secondary air duct 21 is led out downstream of the filter 61 of the air conditioning unit, and the secondary air duct 21 is connected to the air inlet end 34 of the mixing assembly 3. In some embodiments, the secondary air duct 21 is led out from the top end of the air conditioning unit to reduce the floor space. Figures 1 to 4 The values detected by the temperature and humidity detection element 51 are input into the controller of the air conditioning unit as one of the bases for determining whether the heater 52 of the air conditioning unit is working.

[0120] The secondary air duct 21 is connected to the mixing assembly 3. In some embodiments, the secondary air duct 21 can be connected to the frame 36 of the mixing assembly 3 from the top of the air conditioning unit, or connected to the frame 36 of the mixing assembly 3 from the side of the air conditioning unit.

[0121]

[0122] ​​The outlet of the secondary air duct 21 is connected to the support pipe 32 of the air mixing assembly 3. In some embodiments, only the support pipe 32 closest to the primary air windward surface is connected. In some embodiments, the support pipe 32 can be a circular pipe. In order to improve the air supply capacity of the support pipe 32 and reduce the area of the windward surface of the support pipe 32 to reduce the resistance to the primary air, the support pipe 32 can have a structure with a circular arc windward surface and a rectangular back surface. In order to meet the demand for secondary air volume, a plurality of support pipes 32 can be arranged in the air mixing assembly 3 of the air conditioning unit.

[0123] A plurality of nozzles 33 for spraying secondary air are arranged on the leeward surface of the support pipe 32. Due to the obstruction of the support pipe 32 to the primary air, the wind speed at the upper and lower edges of the support pipe 32 increases, forming a local negative pressure on the front and back surfaces of the support pipe 32, which facilitates the outflow of secondary air from the nozzles 33.

[0124] In some embodiments, the air volume and blowing angle of the nozzles 33 can be adjusted within a certain range. In some embodiments, the nozzles 33 have a spiral flow structure similar to a spiral flow air port, so that the secondary air sprayed by the nozzles 33 can wrap the primary air and mix better with the primary air. The increased wind speed at the upper and lower edges of the support pipe 32 has the effect of guiding and mixing the outflow of secondary air from the nozzles 33.

[0125] According to the mixing requirements, the baffle 31 can be provided with a plurality of curved panels. The secondary air and the primary air pass through the bending parts formed by the plurality of curved panels of the baffle 31 to achieve multiple mixing.

[0126] Part of the mixed air of fresh air and return air serves as primary air and passes through the heat exchanger 12 of the air conditioning unit to reach the air mixing assembly 3. Another part of the mixed air of fresh air and return air serves as secondary air and passes through the first air valve 22, the secondary air duct 21, and the support pipe 32 to reach the air mixing assembly 3 and mix with the primary air. The heat exchanger 12 includes closely arranged fins, which has a large operating resistance to the primary air in the dehumidification state. In addition, by adopting technical measures such as reducing direct turning, smooth inner surface, and appropriate flow rate, the secondary air duct formed by the first air valve 22, the secondary air duct 21, and the support pipe 32 has a small resistance, which is smaller than the resistance of the primary air passing through the heat exchanger 12 of the air conditioning unit. By adjusting the valve opening of the first air valve 22, the primary air and the secondary air can be mixed as needed without additional power consumption.

[0127] The air mixing assembly 3 is a non-standard component, and the material and structure of the frame 36, the support pipe 32, and the baffle 31 can be designed non-standardly according to requirements to achieve uniform mixing of the primary air and the secondary air.

[0128] The heat exchanger 12 and the frame 36 of the air mixing assembly 3 need to be sealed well with the inner wall of the air conditioning unit, for example, equipped with sealing rubber strips, polyurethane foaming sealing, etc., to prevent the air in the mixed air duct 4 from leaking through the gap between the frame 36 and the inner wall of the air conditioning unit, and to reduce the adjustment and control effect of the system.

[0129] Based on the above embodiments of the present application, the technical features of one embodiment can be beneficially combined with one or more other embodiments without explicit negation or conflict.

[0130] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood that such examples are for illustrative purposes only and are not intended to limit the scope of the present application. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. An air conditioning unit, comprising: The application relates to a mixed air supply device, comprising: a mixed air supply assembly (3) comprising a baffle (31) and a support pipe (32), the baffle (31) being arranged between an air inlet end (34) and an air outlet end (35) of the mixed air supply assembly (3), the support pipe (32) being arranged at the air inlet end (34) and being provided with a nozzle (33) facing the air outlet end (35); a primary air supply assembly (1) configured to supply primary air into the mixed air supply assembly (3) from the air inlet end (34); and a secondary air supply assembly (2) in communication with the support pipe (32) and configured to supply secondary air to the support pipe (32); wherein the baffle (31) is configured to mix the primary air and the secondary air in the mixed air supply assembly (3) and make the mixed air flow out of the air outlet end (35). The number of baffles (31) is at least two, and the support pipe (32) is connected with the at least two baffles (31) to fix and support the at least two baffles (31).

2. The air conditioning unit of claim 1, wherein The baffle (31) comprises a plurality of curved panels which are spliced with each other and have an included angle greater than zero between two adjacent curved panels.

3. The air conditioning unit of claim 1, wherein The included angle between the two adjacent curved panels is adjustable.

4. The air conditioning unit of claim 3, wherein The nozzle (33) is configured to make the air flow rotatingly flow out of the nozzle (33).

5. The air conditioning unit of claim 1, wherein The windward surface of the support pipe (32) facing the primary air is constructed as an arc surface (321), and the cavity downstream of the arc surface (321) is constructed as a rectangular cavity (322).

6. The air conditioning unit of claim 1, wherein The nozzle (33) is arranged on the wall surface of the rectangular cavity (322) close to the air outlet end (35).

7. The air conditioning unit of claim 6, wherein The number of support pipes (32) is at least two, and the at least two support pipes (32) are arranged in an up-down interval and each support pipe (32) extends laterally.

8. The air conditioning unit of claim 1, wherein The primary air supply assembly (1) comprises:

9. The air conditioning unit of claim 1, wherein a heat exchanger (12) configured to adjust the temperature and humidity of the air flow; and a primary air duct (11) in communication between the outlet of the heat exchanger (12) and the air inlet end (34) of the mixed air supply assembly (3). The secondary air supply assembly (2) comprises:

10. The air conditioning unit of claim 1, wherein a secondary air duct (21) in communication with the support pipe (32); and a first air valve (22) arranged in the secondary air duct (21) and configured to control the on-off and flow of the secondary air duct (21). The application further comprises a mixed air duct (4) configured to transport mixed air of fresh air and return air, the mixed air duct (4) being connected with the primary air supply assembly (1) and the secondary air supply assembly (2) respectively.

11. The air conditioning unit of any one of claims 1 to 10, wherein, The application further comprises an air supply assembly (5) in communication with the air outlet end (35) of the mixed air supply assembly (3) and configured to send the air flow discharged from the air outlet end (35) of the mixed air supply assembly (3) to a room.

12. The air conditioning unit of any one of claims 1 to 10, wherein, ​

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