A fresh air air conditioner capable of achieving positive and reverse air discharge

Abstract

The present invention provides a fresh air air conditioner capable of achieving forward and reverse air outlet, comprising a casing, wherein a first vent, a second vent and a third vent are respectively arranged on the outer wall of the casing, a first air filter module, a heat exchanger module, a reversible fan module and a second air filter module are arranged from top to bottom in an inner cavity of the casing, the reversible fan module comprises a bracket and a fan arranged on the bracket, the bracket comprises an upper bracket, a middle bracket and a lower bracket, an upper air inlet and an upper air outlet are arranged on the upper bracket, a lower air inlet and a lower air outlet are arranged on the lower bracket, the fan is fixed on the middle bracket, a middle air inlet is arranged on the middle bracket, the upper air inlet, the upper air outlet, the lower air inlet and the lower air outlet are all provided with electronic switch valves, the electronic switch valves are electrically connected to a PLC circuit board arranged inside the casing, the present invention can realize the conversion of the internal air path of the air conditioner without reversing the fan, thereby enhancing the operating stability of the air conditioner.

Description

Technical Field

[0001] The invention relates to the field of air conditioners, in particular to a fresh air air conditioner capable of achieving forward and reverse air discharge. Background Art

[0002] In order to meet the comfort requirements in summer and winter, the requirements for air flow organization are often different. In order to meet the comfort requirements, the air conditioners in the prior art use different angles of the air outlet blades to achieve different blowing effects. However, the positions of the air outlet and the return air outlet of the fresh air air conditioners or air conditioners in the prior art are often fixed and cannot be changed according to the use requirements. In order to solve the above problems, some devices have appeared on the market that change the direction of the air blown by the fan to achieve the effect of mutual conversion between the air outlet and the return air outlet. However, in the field of fresh air air conditioning in the current technology, due to the high pressure requirements of the fan, centrifugal fans are usually used. When considering the fan with two-way air outlet, the volute must be used to change the air duct. The structure is complex, the assembly sealing requirements and the design requirements of the movable mechanism are high, and the reversing problem also leads to the reduction of the fan performance. For axial flow and mixed flow fans, the pressure requirements of the fan often cannot meet the requirements, and the fan requires the motor to achieve forward and reverse rotation, which increases the difficulty of motor control. Therefore, the wind direction change function of the fresh air air conditioner in the prior art is not easy to achieve. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a fresh air air conditioner capable of achieving forward and reverse air discharge, so as to solve the problems raised in the above technical background.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] A fresh air air conditioner capable of achieving forward and reverse air outlet comprises a casing, wherein a first vent, a second vent and a third vent are respectively arranged on the outer wall of the casing, a first air filter module, a heat exchanger module, a reversible fan module and a second air filter module are arranged from top to bottom in an inner cavity of the casing, the reversible fan module comprises a bracket and a fan arranged on the bracket, the bracket comprises an upper bracket, a middle bracket and a lower bracket, the upper bracket is provided with an upper air inlet and an upper air outlet, the lower bracket is provided with an A lower air inlet and a lower air outlet are provided, the middle bracket is provided between the upper bracket and the lower bracket, the fan is fixed on the middle bracket, a middle air inlet is provided on the middle bracket, the middle air inlet is connected with the upper air inlet, the lower air inlet and the air inlet of the fan respectively, the upper air outlet and the lower air outlet are both connected with the air outlet of the fan, the upper air inlet, the upper air outlet, the lower air inlet and the lower air outlet are all provided with electronic switch valves, the electronic switch valves are electrically connected to a PLC circuit board provided inside the casing.

[0006] In the above invention content, further, the upper bracket is provided with two air outlets, and the two upper air outlets are arranged on the left and right sides of the upper air inlet, and the lower bracket is provided with two lower air outlets, and the two lower air outlets are arranged on the left and right sides of the lower air inlet, and two middle brackets are provided between the upper bracket and the lower bracket, and the two middle brackets are provided with fans and have middle air inlets, the two upper air outlets and the two lower air outlets are correspondingly connected with the air outlets of the two fans, the two middle air inlets are connected with the upper air inlet and the lower air inlet, and the air inlets of the two fans are correspondingly connected with the two middle air inlets.

[0007] In the above invention, further, the two upper air outlets are symmetrically arranged along the upper air inlet, and the two lower air outlets are symmetrically arranged along the lower air inlet.

[0008] In the above invention, further, a partition is provided between the two middle air inlets, and upper and lower ends of the partition are respectively fixed on the upper bracket and the lower bracket.

[0009] In the above invention, further, the surfaces on both sides of the partition are provided with through holes with a porosity of 70%-95%, and the inner layer of the partition is also provided with sound-absorbing cotton.

[0010] In the above invention, further, the distance between the two middle air inlets is greater than four fifths of the diameter of the fan.

[0011] In the above invention, further, the distance between the middle air inlet and the inner wall of the casing is greater than two-thirds of the diameter of the fan.

[0012] The beneficial effects of the present invention are:

[0013] The present invention can realize the conversion of the internal air path of the air conditioner without reversing the fan, thereby enhancing the operating stability of the air conditioner and also increasing the service life of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view of the present invention;

[0015] Figure 2 is a side view of the present invention;

[0016] Figure 3 It is a structural schematic diagram of the reversible fan module of the present invention;

[0017] Figure 4 Another structural schematic diagram of the reversible fan module of the present invention;

[0018] Figure 5 It is a schematic diagram of the connection structure between the reversible fan module and the casing of the present invention;

[0019] Figure 6It is the noise value proportional coefficient curve diagram in Example 1;

[0020] Figure 7 is a noise value proportional coefficient curve diagram in Example 2;

[0021] Figure 8 This is a schematic diagram of the partition structure of the present invention;

[0022] Fig. 9 It is a schematic diagram of the surface structure of the partition of the present invention;

[0023] Fig.10 It is a schematic diagram of the inner layer structure of the partition of the present invention.

[0024] In the figure, 1-housing, 2-first air filter module, 3-heat exchanger module, 4-reversible fan module, 5-second air filter module, 4.01-fan, 4.02-upper bracket, 4.03-middle bracket, 4.04-lower bracket, 4.05-upper air inlet, 4.06-upper air outlet, 4.07-lower air inlet, 4.08-lower air outlet, 4.09-middle air inlet, 4.10-partition, 4.11-through hole, 4.12-sound-absorbing cotton. DETAILED DESCRIPTION

[0025] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0026] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0027] Embodiment 1:

[0028] A fresh air air conditioner capable of delivering positive and negative airflow, see the attached Figure 1 -Attached Figure 3As shown, it includes a casing 1, and the outer wall of the casing 1 is respectively provided with a first vent 1.1, a second vent 1.2 and a third vent 1.3. The inner cavity of the casing 1 is provided with a first air filter module 2, a heat exchanger module 3, a reversible fan module 4 and a second air filter module 5 from top to bottom. The reversible fan module includes a bracket and a fan 4.01 arranged on the bracket. The bracket includes an upper bracket 4.02, a middle bracket 4.03 and a lower bracket 4.04. The upper bracket 4.02 is provided with an upper air inlet 4.05 and an upper air outlet 4.06. The lower bracket 4.04 is provided with a lower air inlet 4.07 and a lower air outlet 4.08. The middle bracket The bracket 4.03 is arranged between the upper bracket 4.02 and the lower bracket 4.04, the fan 4.01 is fixed on the middle bracket 4.03, and the middle bracket 4.03 is provided with a middle air inlet 4.09, the middle air inlet 4.09 is respectively connected with the upper air inlet 4.05, the lower air inlet 4.07 and the air inlet of the fan 4.01, the upper air outlet 4.06 and the lower air outlet 4.08 are both connected with the air outlet of the fan 4.01, and the upper air inlet 4.05, the upper air outlet 4.06, the lower air inlet 4.07 and the lower air outlet 4.08 are all provided with electronic switch valves, and the electronic switch valves are electrically connected to the PLC circuit board arranged inside the casing 1.

[0029] Specifically, during the working process of the invention, the first ventilation port 1.1 is connected to the outside through the ventilation duct. When the air conditioner needs to supply air to the room, the outdoor air enters the casing through the first ventilation port under the action of the fan, and passes through the first air filter module 2 and the heat exchanger module 3 in sequence. At this time, the PLC controls the electronic switch valve on the air inlet 4.05 on the circuit board to open, and the upper air inlet is opened. At the same time, the upper air outlet 4.06 is closed, the lower air inlet 4.07 is closed, and the lower air outlet 4.08 is opened. Due to the rotation of the fan 4.01, the fan 4.01 generates negative pressure at the middle air inlet 4.09 , outdoor air enters the middle air inlet 4.09 from the upper air inlet 4.05, is discharged from the lower air outlet 4.08, and is finally discharged into the indoor room through the second air filter module 5 and the third air outlet 1.3. It should be noted that the electronic valve switch mentioned above can be a conventional blade such as an electric blade that can block the air outlet, such as the electric rotating blade of the air-conditioning outlet. The PLC control circuit board controls the electronic valve switch, which is also a conventional technical solution in the field of this technology. Therefore, in this embodiment, no further explanation is given on how the PLC control circuit board controls the opening or closing of the electronic valve switch.

[0030] Furthermore, when the air conditioner needs to discharge sewage or purify the air in the room, the PLC control circuit board controls the lower air inlet 4.07 to open, the lower air outlet 1.08 to close, the upper air inlet 4.08 to close, and the upper air outlet 4.06 to open. After the indoor air passes through the third vent 1.3 and the second air filter module 5, it enters the middle air inlet 4.09 from the lower air inlet 4.07 and is finally discharged from the upper air outlet 4.06. When the air conditioner is in the sewage discharge mode, the indoor air discharged from the upper air outlet 4.06 passes through the heat exchanger module 3 and the first air filter module 2 and is discharged to the outdoors through the first vent 1.1. When the air conditioner is in the purification mode, the indoor air discharged from the upper air outlet 4.06 passes through the heat exchanger module 3 and the first air filter module 2 and is discharged back into the indoor room through the second vent 1.2.

[0031] From the above, it can be seen that when the air conditioner changes its working mode, the present invention can change the air path in the casing 1 (specifically from top to bottom or from bottom to top) without reversing the fan 4.01 by controlling the opening or closing of the upper air inlet 4.05, the upper air outlet 4.06, the lower air inlet 4.07, and the lower air outlet 4.08. Compared with the traditional solution of changing the air path by using a forward or reverse fan, the present invention does not need to stop the fan. The fan only needs to maintain a rotating state during the process, so that the operation of the entire air conditioner is more stable, the fan is not easily damaged, and the service life of the fan is increased.

[0032] In addition, in order to reduce the noise of fan 4.01 during operation, the applicant has conducted repeated experiments and found that the distance between the fan and the side wall of the bracket and the fan diameter directly affect the noise of the fan during operation, and when the distance between the air inlet 4.09 and the side wall of the bracket is greater than two-thirds of the diameter of the fan 4.01, the noise of the fan during operation is significantly reduced. Please refer to the following table and attached Figure 6 As shown:

[0033]

[0034] Embodiment 2:

[0035] In this embodiment, in order to increase the ventilation volume of the entire reversible fan module 4, the cavity is Figure 4 and attached Figure 5As shown, the upper bracket 4.02 is provided with two air outlets 4.06, and the two upper air outlets 4.06 are arranged on the left and right sides of the upper air inlet 4.05. The lower bracket 4.04 is provided with two lower air outlets 4.08, and the two lower air outlets 4.08 are arranged on the left and right sides of the lower air inlet 4.07. Two middle brackets 4.03 are arranged between the upper bracket 4.02 and the lower bracket 4.04, and the two middle brackets 4.03 are both provided with fans 4.01 and have middle air inlets. 4.09, the two upper air outlets 4.06 and the two lower air outlets 4.08 are connected to the air outlets of the two fans 4.01 correspondingly, the two middle air inlets 4.09 are connected to the upper air inlet 4.05 and the lower air inlet 4.07, and the air inlets of the two fans 4.01 are connected to the two middle air inlets 4.09 correspondingly. Preferably, the two upper air outlets 4.06 are symmetrically arranged along the upper air inlet 4.05, and the two lower air outlets 4.08 are symmetrically arranged along the lower air inlet 4.07.

[0036] Specifically, in this embodiment, during the operation of the air conditioner, outdoor air enters the casing 1 through the first vent 1.1, and then passes through the first air filter module 2 and the heat exchanger module 3 in sequence. At this time, the two upper air outlets 4.06 of the PLC control circuit board are closed, the upper air inlet 4.05 is opened, the lower air inlet 4.07 is closed, and the two lower air outlets are opened. Under the action of the two fans 4.01, the outdoor air enters the two middle air inlets 4.09 from the upper air inlet 4.05, and is then discharged through the two lower air outlets 4.08 respectively, and finally is discharged into the room through the second air filter module 5 and the third vent 1.3. In this embodiment, since two fans 4.01 are provided, the air intake per unit time is increased. The amount of air blown into the room increases accordingly. Similarly, when the air path in the casing 1 needs to be converted, the PLC control circuit board controls the two lower air outlets 4.08 to close, the lower air inlet 4.07 to open, the upper air inlet 4.05 to close, and the two upper air outlets 4.06 to open. After the indoor air passes through the third vent 1.6 and the second air filter module 5, it enters the two middle air inlets 4.09 through the lower air inlet 4.07 under the action of the two fans 4.01, and is then discharged through the two upper air outlets 4.06. The indoor air discharged from the two air outlets 4.06 is discharged from the first vent 1.1 or the second vent 1.2 according to the selected air conditioner working mode.

[0037] In summary, in this embodiment, by symmetrically arranging the fan 4.01, the upper air outlet 4.06 and the lower air outlet 4.08 on the bracket, the purpose of increasing the air intake and air outlet of the air conditioner is achieved.

[0038] It should be noted that in this embodiment, similar to Embodiment 1, the applicant has found through repeated experiments that the distance between the two fan air inlets and the fan diameter directly affect the noise during fan operation, and when the distance between the two middle air inlets is greater than four fifths of the fan diameter, the noise during fan operation is significantly reduced. Please refer to the following table and attached Figure 7 As shown:

[0039]

[0040] Embodiment 3:

[0041] Please see attached Figure 8 As shown, unlike Example 2, in this embodiment, a partition 4.10 is further provided between the two middle air inlets 4.09, and the upper and lower ends of the partition 4.10 are respectively fixed on the upper bracket 4.02 and the lower bracket 4.04. The purpose of arranging the partition 4.10 in this embodiment is to isolate the noise of the two fans, thereby reducing the coupling effect of the noise of the two fans.

[0042] For further information, please see the attached Fig. 9 and attached Fig.10 As shown, through holes 4.11 with a porosity of 70%-95% are provided on the surfaces of both sides of the partition 4.10, and the inner layer of the partition 4.10 is also provided with sound-absorbing cotton 4.12. By providing the through holes 4.11 on the surface of the partition 4.10, the noise of the two fans can be absorbed by the sound-absorbing cotton 4.12 through the through holes 4.11, thereby further reducing the noise when the fans are running.

[0043] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A fresh air air conditioner capable of achieving forward and reverse air discharge, comprising a casing, wherein a first vent, a second vent and a third vent are respectively arranged on the outer wall of the casing, and a first air filter module, a heat exchanger module, a reversible fan module and a second air filter module are arranged in the inner cavity of the casing from top to bottom, characterized in that: The reversible fan module comprises a bracket and a fan arranged on the bracket, the bracket comprises an upper bracket, a middle bracket and a lower bracket, the upper bracket is provided with an upper air inlet and an upper air outlet, the lower bracket is provided with a lower air inlet and a lower air outlet, the middle bracket is arranged between the upper bracket and the lower bracket, the fan is fixed on the middle bracket, the middle bracket is provided with a middle air inlet, the middle air inlet is respectively connected with the upper air inlet, the lower air inlet and the air inlet of the fan, the upper air outlet and the lower air outlet are both connected with the air outlet of the fan, the upper air inlet, the upper air outlet, the lower air inlet and the lower air outlet are all provided with electronic switch valves, and the electronic switch valves are electrically connected to a PLC circuit board arranged inside the casing; The upper bracket is provided with two air outlets, and the two upper air outlets are arranged on the left and right sides of the upper air inlet; the lower bracket is provided with two lower air outlets, and the two lower air outlets are arranged on the left and right sides of the lower air inlet; two middle brackets are provided between the upper bracket and the lower bracket, and the two middle brackets are provided with fans and have middle air inlets; the two upper air outlets and the two lower air outlets are connected to the air outlets of the two fans correspondingly, and the two middle air inlets are connected to the upper air inlet and the lower air inlet, and the air inlets of the two fans are connected to the two middle air inlets correspondingly; The two upper air outlets are symmetrically arranged along the upper air inlet, and the two lower air outlets are symmetrically arranged along the lower air inlet; A partition is provided between the two middle air inlets, and the upper and lower ends of the partition are respectively fixed to the upper bracket and the lower bracket; The surfaces on both sides of the partition are provided with through holes with a porosity of 70%-95%, and the inner layer of the partition is also provided with sound-absorbing cotton; The distance between the two middle air inlets is greater than four fifths of the diameter of the fan, and the distance between the middle air inlet and the inner wall of the casing is greater than two thirds of the diameter of the fan.

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