CN219510914U - Air conditioning unit - Google Patents

Abstract

The utility model relates to an air conditioning unit, comprising: the air mixing assembly comprises a baffle and a supporting tube, and the baffle is arranged between an air inlet end and an air outlet end of the air mixing assembly; the support tube is arranged at the air inlet end, the support tube is provided with a nozzle, and the nozzle faces the air outlet end; a primary air assembly configured to provide primary air and to cause the primary air to enter the air mixing assembly from the air inlet end; and a overgrate air assembly in communication with the support tube and configured to provide overgrate air to the support tube; the baffle is configured to enable primary air and secondary air in the air mixing assembly to collide and mix, and flow out of the air outlet end. The secondary air and the primary air are acted by the baffle plate in the air mixing assembly, and are folded back, collided and mixed for many times, so that the mixing uniformity of the primary air and the secondary air is improved, the temperature of the primary air and the secondary air after being mixed is close to the air supply temperature, and the problem that the air supply temperature of an air conditioner is greatly different from the indoor temperature is solved.

Description

Air conditioning unit

Technical Field

The utility model relates to the field of central air conditioners, in particular to an air conditioning unit.

Background

The constant temperature and humidity factory adopts a combined air conditioning box to regulate and control the temperature and humidity of the controlled area all the year round. The combined air conditioning box adopts the modes of primary air return, air exhaust and fresh air supplement, and then carries out the heat-moisture treatment process flow. In seasons of high temperature and high humidity such as summer, the surface air cooler is usually required to dehumidify air at a low temperature to reduce the supply air humidity of the combined air conditioning unit. After dehumidification at low temperature, the air supply temperature may be low, and heat energy is consumed for reheating; or the air supply temperature is too low, so that a human body feels supercooled, and water drops can be condensed and dripped on the frame of the air supply opening.

Disclosure of Invention

Some embodiments of the present utility model provide an air conditioning unit for reducing the problem that the temperature of air supplied by an air conditioner differs greatly from the indoor temperature.

In one aspect of the present utility model, there is provided an air conditioning unit including:

the air mixing assembly comprises a baffle and a supporting tube, and the baffle is arranged between an air inlet end and an air outlet end of the air mixing assembly; the support tube is arranged at the air inlet end, the support tube is provided with a nozzle, and the nozzle faces the air outlet end;

a primary air assembly configured to provide primary air and to cause the primary air to enter the air mixing assembly from the air inlet end; and

a overgrate air assembly in communication with the support tube and configured to provide overgrate air to the support tube;

the baffle is configured to enable primary air and secondary air in the air mixing assembly to collide and mix, and flow out of the air outlet end.

In some embodiments, the number of baffles is at least two, and the support tube is connected to the at least two baffles to fix and support the at least two baffles.

In some embodiments, the baffle comprises a plurality of curved panels that are spliced to one another with an included angle greater than zero between two adjacent curved panels.

In some embodiments, the included angle between the two adjacent curved plates is adjustable in size.

In some embodiments, the nozzle is configured to cause a rotational flow of the airflow ejected therethrough.

In some embodiments, the windward side of the support tube facing the primary wind is configured as an arcuate surface, and the cavity of the support tube downstream of the arcuate surface is configured as a rectangular cavity.

In some embodiments, the nozzle is disposed on a wall surface of the rectangular cavity near the air outlet end.

In some embodiments, the number of support tubes is at least two, the at least two support tubes are spaced one above the other, and each support tube extends laterally.

In some embodiments, the primary air assembly comprises:

a heat exchanger configured to perform temperature and humidity adjustment on an air flow flowing therethrough; and the primary air duct is communicated with the outlet of the heat exchanger and the air inlet end of the air mixing assembly.

In some embodiments, the overgrate air assembly comprises:

the secondary air pipe is communicated with the supporting pipe; and

the first air valve is arranged on the secondary air pipe and is configured to control the on-off and flow of the secondary air pipe.

In some embodiments, the air conditioning unit further comprises a mixing duct configured to deliver a mix of fresh air and return air, the mixing duct being connected to the primary air assembly and the secondary air assembly, respectively.

In some embodiments, the air conditioning unit further comprises an air supply assembly in communication with the air outlet end of the air mixing assembly and configured to deliver an air flow discharged from the air outlet end of the air mixing assembly into a room.

Based on the technical scheme, the utility model has at least the following beneficial effects:

in some embodiments, primary air enters the air mixing assembly from the air inlet end of the air mixing assembly, secondary air is sprayed out through a nozzle on a supporting tube of the air inlet end of the air mixing assembly, enters the air mixing assembly, the nozzle faces the air outlet end, secondary air is sprayed forward along the air flow of the primary air through the nozzle, the secondary air and the primary air are acted by a baffle plate in the air mixing assembly, and the secondary air and the primary air are folded back, collided and mixed repeatedly, so that the mixing uniformity of the primary air and the secondary air is improved, the temperature after the primary air and the secondary air are mixed is close to the air supply temperature, and the problem that the air supply temperature of an air conditioner and the indoor temperature are greatly different is solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is a schematic illustration of an air conditioning unit provided in accordance with some embodiments of the present utility model;

FIG. 2 is a schematic top view of a wind mixing assembly provided according to some embodiments of the present utility model;

FIG. 3 is an enlarged schematic view of a partial structure of a baffle plate according to some embodiments of the present utility model;

FIG. 4 is a schematic side view of a wind mixing assembly provided according to some embodiments of the utility model;

fig. 5 is a schematic cross-sectional view of a support tube provided in accordance with some embodiments of the utility model.

The reference numbers in the drawings are as follows:

1-a primary air component; 11-a primary air duct; 12-a heat exchanger;

2-a secondary air assembly; 21-a secondary air pipe; 22-a first damper;

3-a wind mixing assembly; 31-a baffle; 31A-a first curved panel; 31B-a second curved panel; 31C-a third curved panel; 31D-a fourth curved plate; 311-a first flap; 312-a second flap; 313-a third flap; 312' -a second flap of the other flap; 32-supporting the tube; 321-arc-shaped surface; 322-rectangular cavity; 33-nozzles; 34-an air inlet end; 35-an air outlet end; 36-frame; 37-supporting rods;

4-mixing air duct;

5-an air supply assembly; 51-a temperature and humidity detection element; 52-a heater; 53-humidifier; 54-blower; 55-a second air valve;

61-a filter; 62-a third damper; 63-a fourth damper; 64-a fifth damper; 65-a sixth air valve; 66-a return fan; 67-a first separator; 68-second separator.

It should be understood that the dimensions of the various elements shown in the figures are not drawn to actual scale. Further, the same or similar reference numerals denote the same or similar members.

Detailed Description

Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative, and is in no way intended to limit the utility model, its application, or uses. The present utility model may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.

The terms "first," "second," and the like, as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

In the present utility model, when it is described that a specific device is located between a first device and a second device, an intervening device may or may not be present between the specific device and the first device or the second device. When it is described that a particular device is connected to other devices, the particular device may be directly connected to the other devices without intervening devices, or may be directly connected to the other devices without intervening devices.

All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In high temperature and high humidity seasons such as summer, outdoor fresh air is required to be dehumidified at low temperature and then is sent into a room, the lower air supply temperature can cause supercooling of a controlled area, or the human body feels supercooling due to the fact that the air supply temperature is too low, and water drops are condensed and drop in the border of an air supply port.

Based on this, send into indoor after mixing outdoor new trend and indoor return air heat and humidity treatment, can enough utilize the return air to reduce the temperature of new trend, realize the dehumidification to the new trend, can alleviate the new trend temperature again and be reduced by the transition, need the problem of reheat.

After the fresh air and the return air are mixed, one part of the fresh air is used as primary air to adjust the temperature and the humidity through the heat exchanger, the other part of the fresh air is used as secondary air to adjust the temperature and the humidity without passing through the heat exchanger, and then the primary air and the secondary air are mixed, so that the temperature and the humidity of the air fed into a room can be better controlled.

In order to improve the uniformity of mixing of primary air and secondary air, the embodiment of the utility model provides an air conditioning unit which is used for improving the uniformity of mixing of primary air and secondary air and relieving the problem of larger difference between the air supply temperature and indoor temperature of an air conditioner.

Fig. 1 is a schematic structural view of some embodiments of an air conditioning unit according to the present utility model. Referring to fig. 1, in some embodiments, an air conditioning unit includes a mixing air assembly 3, a primary air assembly 1, and a secondary air assembly 2.

Referring to fig. 2 and 3, the air mixing assembly 3 includes a baffle 31 and a support tube 32, the baffle 31 being disposed between an air inlet end 34 and an air outlet end 35 of the air mixing assembly 3; the support tube 32 is arranged at the air inlet end 34, the support tube 32 is provided with a nozzle 33, and the nozzle 33 faces the air outlet end 35.

The support tube 32 is a tube with a ventilation cavity inside.

The air outlet end 35 is provided with a supporting rod 37, and the supporting rod 37 is used for fixing the baffle 31.

The primary air assembly 1 is configured to provide primary air and to cause the primary air to enter the air mixing assembly 3 from the air inlet end 34.

The overgrate air assembly 2 communicates with the support tube 32 and is configured to provide overgrate air to the support tube 32.

Wherein the baffle 31 is configured to collide and mix primary air and secondary air in the air mixing assembly 3, and flow out from the air outlet end 35.

The primary air enters the air mixing assembly 3 from the air inlet end 34 of the air mixing assembly 3, the secondary air is sprayed out through the nozzle 33 on the supporting tube 32 of the air inlet end 34 of the air mixing assembly 3, enters the air mixing assembly 3, the nozzle 33 faces the air outlet end 35, the secondary air is sprayed forward along the air flow of the primary air through the nozzle 33, the secondary air and the primary air are acted by the baffle 31 in the air mixing assembly 3, and are folded back, collided and mixed for many times, so that the mixing uniformity of the primary air and the secondary air is improved, the temperature after the primary air and the secondary air are mixed is close to the air supply room temperature, and the problem that the air supply temperature and the indoor temperature of an air conditioner are greatly different is solved.

Furthermore, the support tube 32 blocks the primary air flow, so that the position of the nozzle 33 is in a local low-pressure area, and the secondary air flow is conveniently sprayed out. And primary air flows into the air mixing assembly 3 through the supporting pipe 32, and has a drainage effect on secondary air.

In some embodiments, the overgrate air assembly 2 communicates with an end of the support tube 32. Alternatively, the overgrate air assembly 2 may communicate with any region between the two ends of the support tube 32.

In some embodiments, the support tube 32 comprises a steel tube or a rigid plastic tube.

In some embodiments, the air conditioning unit further comprises a mixing duct 4, the mixing duct 4 being configured to deliver a mix of fresh air and return air, the mixing duct 4 being connected to the primary air assembly 1 and the secondary air assembly 2, respectively.

The fresh air is outdoor fresh air, the return air is indoor return air, a mixed air part obtained by mixing the fresh air and the return air is used as primary air to enter the primary air assembly 1, the secondary air part is used as secondary air to enter the secondary air assembly 2, the primary air of the primary air assembly 1 enters the secondary air assembly 3 from the air inlet end 34 of the air mixing assembly 3, the secondary air of the secondary air assembly 2 is sprayed out through the nozzle 33 on the supporting tube 32 of the air inlet end 34 of the air mixing assembly 3, and enters the air mixing assembly 3, the secondary air and the primary air are acted by the baffle 31 in the air mixing assembly 3, and the mixing uniformity of the primary air and the secondary air is improved by repeatedly turning back, collision and mixing.

In some embodiments, primary air assembly 1 includes a heat exchanger 12 and a primary air duct 11.

The heat exchanger 12 is configured to humidify and condition an air stream flowing therethrough.

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.

In some embodiments, heat exchanger 12 comprises a surface cooler.

In some embodiments, overgrate air assembly 2 includes overgrate air duct 21 and first damper 22.

The secondary air duct 21 communicates with the support tube 32, and the secondary air duct 21 is configured to supply secondary air to the support tube 32.

The first air valve 22 is provided on the secondary air duct 21, and the first air valve 22 is configured to control on-off and flow rate of the secondary air duct 21.

The secondary air duct 21 is provided with a first air valve 22, and the amount of secondary air in the secondary air duct 21 can be adjusted by adjusting the opening of the first air valve 22.

Primary air passes through the heat exchanger 12, and the wind pressure loss is large. The secondary air does not pass through the heat exchanger 12, reaches the supporting tube 32 through the first air valve 22 and the secondary air tube 21, and is sprayed out from the nozzle 33 arranged on the supporting tube 32, so that the wind resistance in the primary air assembly 1 is large, the wind resistance in the secondary air assembly 2 is small, and the wind pressure loss of the secondary air is smaller than that of the primary air; by adjusting the opening of the first damper 22, the primary air and the secondary air can be mixed in a ratio as required without additional power consumption.

In some embodiments, the number of baffles 31 is at least two, and a support tube 32 is connected to the at least two baffles 31 to fix and support the at least two baffles 31.

The support pipe 32 can not only convey the secondary air, but also serve as a support piece to support the fixed baffle 31, so that the structure of the air mixing assembly 3 is simple and compact.

In some embodiments, the baffle 31 comprises a plurality of curved panels that are spliced to one another with an included angle greater than zero between two adjacent curved panels.

Baffle 31 forms the wind channel in mixing wind subassembly 3, and baffle 31 includes a plurality of curved plates, and a plurality of curved plates splice each other, have between two adjacent curved plates and be greater than zero contained angle, and in primary air and overgrate air flowed through the wind channel, and through the portion of winding that forms between a plurality of curved plates for the primary air, overgrate air fully winds, collides, mixes, has improved the homogeneity that primary air and overgrate air mix.

The baffle 31 may be designed with a plurality of curved plates as needed to satisfy the mixing uniformity of the primary air and the secondary air. The plurality of curved plates may also enhance the water retaining effect of the baffle 31 on the chiller condensate.

In some embodiments, the material of the baffle 31 may include stainless steel, aluminum alloy, plastic, or the like.

In some embodiments, a plurality of baffles 31 are disposed within the air mixing assembly 3 in the direction of the air inlet end 34 and the air outlet end 35 of the air mixing assembly 3.

In some embodiments, the baffle 31 includes a plurality of curved panels that are spliced to one another to increase the tortuosity of the flow path within the air mixing assembly 3. The included angle between two adjacent curved plates is adjustable, and the size of the included angle between the curved plates influences the flow passage area in the air mixing assembly 3. In the actual operation process, the included angle between two adjacent curved plates can be adjusted according to the running state of the air conditioning unit, so that the flow passage area in the air mixing assembly 3 is adjusted, and the purpose of adjusting the mixing uniformity of the mixed air is achieved.

Referring to fig. 3, in some embodiments, the baffle 31 is formed by continuously splicing a plurality of curved plates, for example, the baffle 31 is formed by continuously splicing a first curved plate 31A, a second curved plate 31B, a third curved plate 31C and a fourth curved plate 31D, and the splicing angles of the adjacent curved plates can be adjusted as required. A strip-shaped folded plate is arranged at the joint of the splicing strip. For example, the baffle 31 formed by continuously splicing four curved panels has three splice joints along the air blowing direction, and three strip-shaped folded plates, namely, a first folded plate 311, a second folded plate 312 and a third folded plate 313 are mounted.

The first curved plate 31A is fixed to the support pipe 32, and the fourth curved plate 31D is fixed to the support rod 37. The support pipe 32 is connected with the secondary air duct 21 and is fixed in place without displacement. The support rod 37 serves only as a function of fixing the fourth curved plate 31D, and is displaceable back and forth in the mixed air flow direction. The hinge connection mode is adopted among the curved plates, and the splicing angles of the first curved plate 31A, the second curved plate 31B, the third curved plate 31C and the fourth curved plate 31D can be adjusted according to the needs through the supporting rods 37.

The folded plates are fixedly connected, wherein the first folded plate 311 is fixed on the first curved plate 31A, the third folded plate 313 is fixed on the fourth curved plate 31D, and the second folded plate 312 is fixed on a hinge connecting the second curved plate 31B and the third curved plate 31C.

And along the airflow direction, the folded plate of one baffle 31 is embedded into the connecting line of the two folded plates of the other baffle 31, for example, the second folded plate 312' on the other baffle 31 extends between the first folded plate 311 and the third folded plate 313 of the adjacent baffle 31; the air mixing component 3 is used for mixing air without direct current, and all the air is subjected to baffling mixing.

At the upper top plate of the air conditioning case above the second folding plate 312, a plurality of groups of guide rails are designed, so that the running track of the second folding plate 312 can be guided when the support rod 37 is pushed and pulled.

The angle of folding between the individual curved plates constituting the baffle 31 is changed by the support bar 37 as required. Referring to fig. 2, if the support bar 37 is pushed to the left, the folding angle of each curved plate becomes smaller, the mixing air flow path between each baffle plate 31 becomes narrower, and the flow rate increases. And the folding angle is smaller, the air steering angle is larger, and the mixed air can be mixed more violently and sufficiently. However, the operation resistance of the mixed air becomes large, and the pressure loss of the mixed air and the operation energy consumption of the air conditioning box are increased. Conversely, if the support bar 37 is pulled rightward, the angle of refraction between the respective curved plates becomes large, the mixing air flow path between the respective baffles 31 becomes wider, and the flow rate becomes smaller. And the folding angle is increased, the air steering angle is decreased, and the mixed air can be mixed more gently. However, the running resistance of the mixed air becomes smaller, and the pressure loss of the mixed air and the running energy consumption of the air conditioning box can be reduced. Therefore, according to the operation condition of the air conditioning case, the mixing uniformity of the mixed air is adjusted by pushing and pulling the supporting rod 37.

In some embodiments, the nozzle 33 is configured to cause the airflow ejected therethrough to swirl. The nozzle 33 has a swirling function, and the injection angle of the nozzle 33 and the injection air amount can be adjusted according to the requirement.

Referring to fig. 4, in some embodiments, the windward side of the support tube 32 facing the primary wind is configured as an arcuate surface 321, and the cavity of the support tube 32 downstream of the arcuate surface 321 is configured as a rectangular cavity 322.

The windward side of the support pipe 32 facing the primary wind is configured as an arc-shaped surface 321, which can reduce wind resistance to the primary wind. The rectangular cavity 322 is arranged at the downstream of the arc-shaped surface 321, so that the air flow passage area inside the support tube 32 can be enlarged, and the movement resistance of secondary air can be reduced.

In some embodiments, the nozzles 33 are disposed on a wall of the rectangular cavity 322 proximate the air outlet end 35.

The nozzle 33 is mounted on the lee side of the support tube 32. The existence of the local low-pressure area on the leeward side facilitates the ejection of the secondary air flow, and the high-speed primary air flow flowing from both sides of the support pipe 32 has a drainage effect on the secondary air flow after the nozzle 33.

Referring to fig. 4, in some embodiments, the number of support tubes 32 is at least two, with at least two support tubes 32 being spaced one above the other, and each support tube 32 extending laterally.

The baffle 31 in the air mixing assembly 3 can be fixedly connected by vertically and alternately arranging at least two support pipes 32, and the baffle 31 is supported.

The mixing assembly 3 comprises a frame 36, wherein the frame 36 supports the connecting baffle 31, the secondary air pipe 21 can be arranged on one side of the frame 36, and the auxiliary frame 36 supports the fixed baffle 31.

The portion of the secondary air duct 21 that connects to the support tube 32 may be part of the frame 36.

The support tube 32 may be accessed through the sides of the baffle 31.

In some embodiments, the air conditioning unit further includes an air supply assembly 5, the air supply assembly 5 being in communication with the air outlet end 35 of the air mixing assembly 3, and the air supply assembly 5 being configured to deliver the air flow discharged from the air outlet end 35 of the air mixing assembly 3 into a room.

In some embodiments, the air supply assembly 5 includes a temperature and humidity sensing element 51. In some embodiments, a plurality of temperature and humidity detecting elements 51 are disposed on the same cross section, and the detected values of the temperature and humidity detecting elements 51 are compared to obtain the mixing uniformity of the mixed air. Meanwhile, the detected values of the temperature and humidity detecting elements 51 are summarized, and after a certain data processing, for example, an average value is obtained as the output of the entire temperature and humidity detecting element 51.

The temperature and humidity detecting element 51 is used for detecting the temperature and humidity of the mixed air discharged from the air outlet end 35 of the mixing assembly 3.

In some embodiments, the air supply assembly 5 further includes a heater 52 and a humidifier 53, and the operating 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 detecting element 51.

In some embodiments, the blower assembly 5 further includes a blower 54, and the blower 54 is used to send the mixed air, which is subjected to temperature and humidity adjustment by the heater 52 and the humidifier 53, into the room.

In some embodiments, the air supply assembly 5 further includes a second air valve 55, where the second air valve 55 is disposed at an air supply port of the air conditioning unit, and the second air valve 55 is used to control opening and closing of the air supply port and opening size.

In some embodiments, the air conditioning unit further includes a controller electrically connected to the temperature and humidity detecting element 51, the heater 52, and the humidifier 53, the controller configured to receive the temperature and humidity of the mixed wind detected by the temperature and humidity detecting element 51, and to control the operation states of the heater 52 and the humidifier 53.

In the temperature and humidity detection, if the deviation of the temperature and humidity value is large, the subsequent heating control is distorted, so that the mixing uniformity of the primary air and the secondary air and the mixing proportion of the primary air and the secondary air need to be improved.

The controller is also connected with the first air valve 22, and is configured to control the opening of the first air valve 22 so as to adjust the mixing proportion of the secondary air and the primary air, so that the air supply temperature after the primary air and the secondary air are mixed 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 solved.

In some embodiments, the controller comprises a PLC controller.

In some embodiments, the first and second dampers 22, 55 comprise electrically powered valves.

After the primary air and the secondary air are mixed, a temperature and humidity detecting element 51 is installed, and the temperature and humidity detecting element 51 is used for detecting a temperature and humidity value of air and guiding reheating of the heater 52. The reheating of the heater 52 can be brought to zero by uniform mixing of the primary and secondary air and proper control of the control system.

In some embodiments, the frame 36 of the heat exchanger 12 and the air mixing assembly 3 is well sealed with the inner wall of the box of the air conditioning unit, so that air in the mixed air duct 4 is prevented from leaking out through a gap between the frame and the inner wall of the box of the air conditioning unit, and the regulation control effect of the system is reduced.

In some embodiments, the air conditioning unit further includes a filter 61, and the mixed air of the fresh air and the return air enters the mixed air duct 4 after being filtered by the filter 61.

In some embodiments, the air conditioning unit further includes a third damper 62, a fourth damper 63, a fifth damper 64, a sixth damper 65, and a return air machine 66.

The air conditioning box body is upwards along the air treatment flow and is respectively provided with a return air section, an exhaust section, a fresh air section, a filtering section, a surface cooling section, a heating section, a humidifying section and an air supply section.

Wherein the return air machine 66 is mounted in the return air section.

A first partition 67 is arranged between the return air section and the exhaust section, and a second partition 68 is arranged between the exhaust section and the fresh air section.

The third air valve 62 is arranged on the upper top plate of the air conditioning box body of the return air section of the air conditioning box and is used for controlling the on-off of the return air duct and the flow of the return air in the return air duct.

The fourth air valve 63 is arranged on the upper top plate of the air conditioning box body behind the air exhaust section and is used for exhausting part of polluted air of the controlled environment.

The fifth damper 64 is a mixing damper and is disposed on the second partition 68 between the exhaust section and the fresh air section.

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: when the fourth damper 63 is opened and the fifth damper 64 is closed, more return air can be discharged through the fourth damper 63.

The sixth air valve 65 is disposed in the new air duct and is used for controlling the on-off of the new air duct and the flow of the fresh air in the new air duct.

In some embodiments of the present utility model, primary air enters the air mixing assembly 3 from the air inlet end 34, secondary air is sprayed out through the nozzle 33 on the supporting tube 32 of the air inlet end 34 of the air mixing assembly 3, enters the air mixing assembly 3, the nozzle 33 faces the air outlet end 35, secondary air is sprayed forward along the airflow of primary air through the nozzle 33, secondary air and primary air are acted by the baffle 31 in the air mixing assembly 3, and are repeatedly turned back, collided and mixed, so that the mixing uniformity of primary air and secondary air is improved, the first air valve 22 is arranged on the secondary air pipe 21, the air quantity of secondary air in the secondary air pipe 21 can be adjusted by adjusting the opening of the first air valve 22, and the primary air and secondary air can be mixed according to the required proportion by adjusting the opening of the first air valve 22, without additional power consumption. The temperature and humidity detection element 51 is arranged at the downstream of the mixing assembly 3, the temperature and humidity value of mixed air can be accurately measured by the temperature and humidity detection element 51, the operation of the heater is guided, the controllability of temperature and humidity adjustment of air after mixed air is improved, and the reheating of an air conditioning unit and the whole operation energy consumption of the air conditioning unit are reduced through adjustment of the control system.

Some specific embodiments of the air conditioning unit are described in detail below with reference to fig. 1 to 4.

As shown in fig. 1 to 4, a 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 air mixing assembly 3. In some embodiments, the secondary air duct 21 is routed from the top of the air conditioning unit to reduce floor space.

The value detected by the temperature and humidity detecting element 51 is input to the controller of the air conditioning unit as one of the bases for determining whether the heater 52 of the air conditioning unit is operating.

The secondary air pipe 21 is connected into the air mixing assembly 3. In some embodiments, the secondary air duct 21 may be connected to the frame 36 of the air mixing assembly 3 from the top of the air conditioning unit, or connected to the frame 36 of the air mixing assembly 3 from the side of the air conditioning unit.

The outlet of the secondary air pipe 21 is connected with a supporting pipe 32 of the air mixing assembly 3. In some embodiments, only the support tube 32 closest to the windward side of the primary wind is accessed. In some embodiments, the support tube 32 may be a circular tube. In order to improve the air supply capability of the support tube 32 and reduce the windward area of the support tube 32 as much as possible to reduce the resistance to the primary air, the support tube 32 may have a structure in which the windward area is an arc surface and the rear surface is rectangular. To meet the requirement of the secondary air volume, a plurality of support pipes 32 can be arranged in the air mixing assembly 3 of the air conditioning unit.

On the leeward side of the primary air of the support pipe 32, a plurality of nozzles 33 for ejecting secondary air are installed. Because the supporting tube 32 blocks the primary air, the wind speed of the upper edge and the lower edge of the supporting tube 32 becomes high, and a local negative pressure is formed on the front and back air surfaces of the supporting tube 32, so that the secondary air in the nozzle 33 is conveniently discharged.

In some embodiments, the ventilation volume, the blowing angle, of the nozzle 33 may be adjusted within a certain range. In some embodiments, the nozzles 33 have a swirl configuration resembling a swirl tuyere, so that the secondary air ejected from the nozzles 33 can wind around the primary air, with which the primary air is better mixed. The wind speed of the upper and lower edges of the support pipe 32 increases, and the flow of the secondary air from the nozzle 33 is guided and mixed.

Depending on the mixing requirements, the baffle 31 may be provided with a plurality of curved plates. The secondary air and the primary air are mixed a plurality of times by the bent portions formed by the plurality of curved plates of the baffle plate 31.

A part of the mixed air of the fresh air and the return air passes through the heat exchanger 12 of the air conditioning unit as primary air and then reaches the air mixing assembly 3. The other part of the mixed air of the fresh air and the return air is taken as the secondary air to pass through the first air valve 22, the secondary air pipe 21 and the supporting pipe 32, reaches the air mixing assembly 3 and is mixed with the primary air. The heat exchanger 12 includes closely arranged fins, and in the dehumidified state, the heat exchanger 12 has a large running resistance to the primary air. In addition, by adopting the technical measures of reducing direct turning, smooth inner surface, proper flow speed and the like, the resistance of the secondary air duct formed by the first air valve 22, the secondary air duct 21 and the support tube 32 is small and is smaller than the resistance of primary air passing through the heat exchanger 12 of the air conditioning unit. By adjusting the valve opening of the first damper 22, the primary air and the secondary air can be mixed as needed without additional power consumption.

The air mixing assembly 3 is a nonstandard piece, and can perform nonstandard design on the materials and structures of the frame 36, the supporting tube 32 and the baffle 31 according to the requirements, so that the requirement of uniform mixing of primary air and secondary air is met.

The heat exchanger 12 and the frame 36 of the air mixing assembly 3 need to be well sealed with the inner wall of the box body of the air conditioning unit, for example, sealing rubber strips, polyurethane foam sealing and the like are arranged, so that air in the mixed air duct 4 is prevented from leaking through gaps between the frame 36 and the inner wall of the box body of the air conditioning unit, and the adjusting and controlling effects of the system are reduced.

Based on the embodiments of the utility model described above, features of one embodiment may be beneficially incorporated in one or more other embodiments without explicit negation or conflict.

While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be understood by those skilled in the art that the foregoing embodiments may be modified and equivalents substituted for elements thereof without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims (12)

1. An air conditioning unit, comprising:

the air mixing assembly (3) comprises a baffle plate (31) and a supporting tube (32), wherein the baffle plate (31) is arranged between an air inlet end (34) and an air outlet end (35) of the air mixing assembly (3); the support tube (32) is arranged at the air inlet end (34), the support tube (32) is provided with a nozzle (33), and the nozzle (33) faces the air outlet end (35);

a primary air assembly (1) configured to provide primary air and to cause primary air to enter the air mixing assembly (3) from the air inlet end (34); and

a secondary air assembly (2) in communication with the support tube (32) and configured to provide secondary air to the support tube (32);

wherein the baffle plate (31) is configured to enable primary air and secondary air in the air mixing assembly (3) to collide and mix, and flow out from the air outlet end (35).

2. Air conditioning unit according to claim 1, characterized in that the number of baffles (31) is at least two, the support tube (32) being connected to at least two baffles (31) for fixing and supporting the at least two baffles (31).

3. Air conditioning unit according to claim 1, characterized in that the baffle (31) comprises a plurality of curved plates, which are mutually spliced, with an angle greater than zero between two adjacent curved plates.

4. An air conditioning assembly as set forth in claim 3 wherein the angle between said adjacent curved panels is adjustable in magnitude.

5. Air conditioning unit according to claim 1, characterized in that the nozzles (33) are configured to cause a rotational flow of the air flow ejected through them.

6. Air conditioning unit according to claim 1, characterized in that the windward side of the support tube (32) facing the primary wind is configured as an arcuate surface (321), and the cavity of the support tube (32) downstream of the arcuate surface (321) is configured as a rectangular cavity (322).

7. The air conditioning unit according to claim 6, characterized in that the nozzle (33) is provided on a wall surface of the rectangular cavity (322) near the air outlet end (35).

8. An air conditioning unit according to claim 1, wherein the number of support tubes (32) is at least two, the at least two support tubes (32) being arranged at intervals one above the other, and each support tube (32) extending transversely.

9. An air conditioning assembly according to claim 1, characterized in that the primary air assembly (1) comprises:

a heat exchanger (12) configured to regulate the temperature and humidity of an air flow flowing therethrough; and

and the primary air duct (11) is communicated with the outlet of the heat exchanger (12) and the air inlet end (34) of the air mixing assembly (3).

10. An air conditioning assembly according to claim 1, characterized in that the overgrate air assembly (2) comprises:

a secondary air duct (21) communicated with the support tube (32); and

and the first air valve (22) is arranged on the secondary air pipe (21) and is configured to control the on-off and flow of the secondary air pipe (21).

11. Air conditioning unit according to any of claims 1 to 10, further comprising a mixing duct (4), the mixing duct (4) being configured to deliver a mixture of fresh air and return air, the mixing duct (4) being connected to the primary air assembly (1) and the secondary air assembly (2), respectively.

12. The air conditioning unit according to any of claims 1 to 10, further comprising an air supply assembly (5), the air supply assembly (5) being in communication with the air outlet end (35) of the air mixing assembly (3) and configured to deliver the air flow exiting the air outlet end (35) of the air mixing assembly (3) into a room.