Fresh air inlet and outlet reversing structure and cabinet air conditioner thereof

Abstract

The fresh air inlet and outlet reversing structure comprises a centrifugal fan and an air duct body, the air duct body is provided with a first air duct, a second air duct, a third air duct and a fourth air duct, and an air inlet of the centrifugal fan communicates with one end of the first air duct and one end of the second air duct; an air outlet of the centrifugal fan communicates with one ends of the third air duct and the fourth air duct, the other ends of the first air duct and the third air duct communicate with the indoor space, and the other ends of the second air duct and the fourth air duct communicate with the outdoor space; the air conditioner further comprises conduction switching structures which are arranged between the first air duct and the third air duct and between the second air duct and the fourth air duct and used for switching the conduction states of the air ducts. Compared with the prior art, under the condition that the number of the centrifugal fans is not increased and the structure of the centrifugal fans is not changed, the function that outdoor air is guided into a room and indoor air is guided out of the room is achieved by designing the air duct body, and low-cost technical improvement is completed.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, specifically to a fresh air inlet / outlet reversing structure and its air conditioning unit. Background Technology

[0002] CN114183824A describes a fresh air conditioner indoor unit, including a main body with a first air outlet and a second air outlet. The main body contains an interconnected airflow channel and an airflow filtration space. The airflow channel is connected to the outside via the first air outlet, and the airflow filtration space is connected to the inside via the second air outlet. The fresh air conditioner indoor unit includes an airflow driving unit disposed in the airflow channel and / or the airflow filtration space. The airflow driving unit is used to drive airflow into the room through the first air outlet and out through the second air outlet, and also to drive airflow into the room through the second air outlet and out through the first air outlet.

[0003] The aforementioned indoor unit of the fresh air conditioner is a wall-mounted unit, and its airflow drive unit is designed with two single-direction drive fans with opposite directions or one double-direction drive fan to achieve the function of introducing outdoor air into the room and expelling indoor air to the outside.

[0004] However, for cabinet air conditioners with independent fresh air exchange function, the fresh air exchange function usually uses a centrifugal fan to deliver air. However, the centrifugal fan can only blow air in one direction, which cannot meet the above-mentioned functions of bringing outdoor air into the room and expelling indoor air to the outside. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a fresh air inlet and outlet reversing structure and its air conditioning unit, so as to solve the problem that the existing air conditioning unit cannot meet the function of introducing outdoor air into the room and exhausting indoor air to the outside by means of a single-rotation centrifugal fan.

[0006] To achieve the above objectives, the first aspect of the present invention adopts the following technical solution: a fresh air inlet / outlet reversing structure, including a centrifugal fan and a duct body, wherein the duct body has a first duct, a second duct, a third duct, and a fourth duct, the air inlet of the centrifugal fan is connected to one end of both the first and second ducts, the air outlet of the centrifugal fan is connected to one end of both the third and fourth ducts, the other ends of both the first and third ducts are connected to the indoor environment, and the other ends of both the second and fourth ducts are connected to the outdoor environment; the structure further includes a switching structure for switching the duct conduction state between the first and third ducts and between the second and fourth ducts.

[0007] Technical principle:

[0008] When it is necessary to exhaust indoor air to the outside, adjust the conduction switching structure to connect the first and fourth air ducts, and disconnect the second and third air ducts. At this time, after the centrifugal fan is running, the indoor air is exhausted to the outside after passing through the first air duct, the air inlet of the centrifugal fan, the air outlet of the centrifugal fan, and the fourth air duct.

[0009] When it is necessary to introduce outdoor air into the room, adjust the switching structure to disconnect the first and fourth air ducts, and connect the second and third air ducts. At this time, after the centrifugal fan is running, the outdoor air is introduced into the room after passing through the second air duct, the air inlet of the centrifugal fan, the air outlet of the centrifugal fan, and the third air duct.

[0010] The second aspect of the present invention adopts the following technical solution: an air conditioning unit, including a fresh air inlet and outlet reversing structure as described in the first aspect of the present invention.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The fresh air intake and exhaust reversing structure in this air conditioning unit achieves the function of introducing outdoor air into the room and exhausting indoor air to the outside without increasing the number of centrifugal fans or changing their structure. This is accomplished through the formation of a first, second, third, and fourth air duct within the air duct body. The first, second, third, and fourth air ducts are connected in a certain way between the centrifugal fans, the indoor unit, and the outdoor unit. This results in a low-cost technical improvement. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an air conditioner cabinet unit according to one embodiment of the present invention;

[0014] Figure 2 for Figure 1 Rear view;

[0015] Figure 3 for Figure 2 A schematic diagram of a partial structure;

[0016] Figure 4 This is a schematic diagram of a fresh air inlet / outlet reversing structure according to an embodiment of the present invention;

[0017] Figure 5 for Figure 4 A diagram illustrating the airflow direction when indoor air is vented to the outside during operation;

[0018] Figure 6 for Figure 4 A diagram illustrating the airflow direction when outdoor air is introduced into the room during operation.

[0019] The reference numerals in the accompanying drawings include: centrifugal fan 11, air duct body 12, first air duct 121, second air duct 122, third air duct 123, fourth air duct 124, conduction switching structure 13, baffle 131, drive structure 14, transmission shaft 141, driver 142, cover plate 2, air outlet A21, and air outlet B22. Detailed Implementation

[0020] The present invention will be further described in detail below through specific embodiments:

[0021] like Figure 3 and Figure 4 As shown, this embodiment of the invention proposes a fresh air inlet / outlet reversing structure, including a centrifugal fan 11 and a duct body 12. The duct body 12 has a first duct 121, a second duct 122, a third duct 123, and a fourth duct 124. The air inlet of the centrifugal fan 11 is connected to one end of the first duct 121 and the second duct 122, and the air outlet of the centrifugal fan 11 is connected to one end of the third duct 123 and the fourth duct 124. The other ends of the first duct 121 and the third duct 123 are connected to the indoor environment, and the other ends of the second duct 122 and the fourth duct 124 are connected to the outdoor environment. The invention also includes a switching structure 13 for switching the duct conduction state, which is provided between the first duct 121 and the third duct 123 and between the second duct 122 and the fourth duct 124.

[0022] When this fresh air intake and exhaust reversing structure is in use:

[0023] like Figure 5 As shown (the arrows in the figure indicate the direction of airflow), when it is necessary to exhaust indoor air to the outside, the conduction switching structure 13 is adjusted to connect the first air duct 121 and the fourth air duct 124, and disconnect the second air duct 122 and the third air duct 123. At this time, after the centrifugal fan 11 is running, the indoor air is exhausted to the outside after passing through the first air duct 121, the air inlet of the centrifugal fan 11, the air outlet of the centrifugal fan 11, and the fourth air duct 124.

[0024] like Figure 6 As shown (the arrows in the figure indicate the direction of airflow), when it is necessary to introduce outdoor air into the room, the switching structure 13 is adjusted to disconnect the first air duct 121 and the fourth air duct 124, and connect the second air duct 122 and the third air duct 123. At this time, after the centrifugal fan 11 is running, the outdoor air is introduced into the room after passing through the second air duct 122, the air inlet of the centrifugal fan 11, the air outlet of the centrifugal fan 11, and the third air duct 123.

[0025] This new air intake and exhaust reversing structure, without increasing the number of centrifugal fans 11 or changing their structure, forms a first air duct 121, a second air duct 122, a third air duct 123, and a fourth air duct 124 within the air duct body 12. The first air duct 121, the second air duct 122, the third air duct 123, and the fourth air duct 124 are connected in a certain way between the centrifugal fans 11, the indoor and outdoor environments, thus realizing the function of introducing outdoor air into the indoor environment and exhausting indoor air to the outdoor environment, achieving a low-cost technical improvement.

[0026] To reduce costs and make the structure simpler, such as Figures 3-6 As shown, according to another embodiment of the present invention, in the fresh air inlet / outlet reversing structure, the two conduction switching structures 13 are synchronously driven by the same driving structure 14.

[0027] Here, the driving structure 14 drives the two switching structures 13 to operate synchronously, so that the first air duct 121 and the fourth air duct 124 are connected and the second air duct 122 and the third air duct 123 are disconnected at the same time, or the first air duct 121 and the fourth air duct 124 are disconnected and the second air duct 122 and the third air duct 123 are connected, so that the adjustment is more convenient and faster, and the structure is simpler.

[0028] Furthermore, both of the aforementioned conduction switching structures 13 include baffles 131, and both baffles 131 are connected to the drive structure 14; wherein, the drive structure 14 includes a transmission shaft 141 connected between the two baffles 131 and a driver 142 connected to the transmission shaft 141.

[0029] In this embodiment, the driver 142 can be a stepper motor, which is fixedly connected to the outer wall of the air duct body 12 with screws. When the stepper motor is running, it is driven by the transmission shaft 141, and the two baffles 131 rotate synchronously to realize the switching operation of connecting the first air duct 121 and the fourth air duct 124 and disconnecting the second air duct 122 and the third air duct 123, or disconnecting the first air duct 121 and the fourth air duct 124 and connecting the second air duct 122 and the third air duct 123.

[0030] In order to make the structural arrangement of the air duct body 12 reasonable and compact, such as Figures 3-6 As shown, according to another embodiment of the present invention, in the fresh air inlet / outlet reversing structure, one port of the second air duct 122 is connected to the near-fan side of the first air duct 121 and the other port is connected to the far-fan side of the fourth air duct 124, and one port of the third air duct 123 is connected to the far-fan side of the first air duct 121 and the other port is connected to the near-fan side of the fourth air duct 124.

[0031] In this invention, by designing the duct body 12 such that there is only one port connected to the indoor environment and one port connected to the outdoor environment, the structure of the duct body 12 is arranged in a reasonable and compact manner while ensuring that the desired purpose is achieved.

[0032] Furthermore, the first air duct 121 has a first guide port on the far side of the fan, and the fourth air duct 124 has a second guide port on the far side of the fan that is coplanar with the first guide port. The plane where the port of the third air duct 123 is connected to the far side of the first air duct 121 is arranged perpendicular to the plane where the first guide port is located. The port where the second air duct 122 is connected to the near side of the first air duct 121 is coplanar with the port where the third air duct 123 is connected to the far side of the first air duct 121. The two conduction switching structures 13 are arranged coplanarly.

[0033] In this invention, the above design enables the first and second duct ports to be arranged coplanarly. The port of the second air duct 122 connected to the near-fan side of the first air duct 121 is arranged coplanarly with the port of the third air duct 123 connected to the far-fan side of the first air duct 121. The plane where the port of the third air duct 123 connected to the far-fan side of the first air duct 121 is located is perpendicular to the plane where the first duct port is located. The plane where the port of the second air duct 122 connected to the far-fan side of the fourth air duct 124 is located is perpendicular to the plane where the second duct port is located. Simultaneously, two baffles 131 are arranged coplanarly, with one baffle 131 located between the first duct port and the port of the third air duct 123 connected to the far-fan side of the first air duct 121, and the other baffle 131 located between the second duct port and the port of the second air duct 122 connected to the far-fan side of the fourth air duct 124. The driver 142 is activated, and driven by the transmission shaft 141, the two baffles 131 rotate synchronously by 90 degrees. The two baffles 131 seal the ports connecting the third air duct 123 to the far-side fan of the first air duct 121 and the second air duct 122 to the far-side fan of the fourth air duct 124, respectively. At this time, the first and second connecting ports, i.e., the first air duct 121 and the fourth air duct 124, are connected, while the second air duct 122 and the third air duct 123 are disconnected. After the centrifugal fan 11 is activated, the indoor air is exhausted to the outside (e.g., Figure 5 (As shown); the driver 142 is activated, and through the drive shaft 141, the two baffles 131 rotate synchronously in opposite directions by 90 degrees. The two baffles 131 seal the first and second through ports respectively. At this time, the port of the third air duct 123 connected to the far-side fan of the first air duct 121 and the port of the second air duct 122 connected to the far-side fan of the fourth air duct 124 are connected. That is, the first air duct 121 and the fourth air duct 124 are disconnected and the second air duct 122 and the third air duct 123 are connected. After the centrifugal fan 11 is activated, outdoor air is introduced into the room (e.g. Figure 6 (As shown).

[0034] Among them, the first air duct 121 and the fourth air duct 124 are both straight air ducts, and the second air duct 122 and the third air duct 123 are both multi-fold air ducts.

[0035] Furthermore, the second air duct 122 and the third air duct 123 are fitted together and located between the first air duct 121 and the fourth air duct 124.

[0036] In this invention, the shape and arrangement of the four air ducts are designed in a reasonable way so that the air duct body 12 has a compact structure and better structural strength.

[0037] In this embodiment, the first air duct 121 and the fourth air duct 124 are arranged in parallel and spaced apart, and the second air duct 122 and the third air duct 123 are joined together in the middle to connect to the same side of the first air duct 121 and the fourth air duct 124. Both ends of the second air duct 122 and the third air duct 123 are bent on at least one side and then connected to the corresponding positions on the first air duct 121 and the fourth air duct 124 to form a compact air duct body 12.

[0038] Applying the fresh air intake / exhaust reversing structure from any of the above embodiments to an air conditioning unit, such as... Figure 1 , Figure 2 as well as Figure 3 As shown, according to another embodiment of the present invention, the air conditioner cabinet unit includes a fresh air inlet / outlet reversing structure as described in any of the above embodiments.

[0039] The air conditioner cabinet unit also includes a casing and a cover plate 2 located on the bottom side of the back of the casing. The air duct body 12 is connected to the inside of the cover plate 2, and the cover plate 2 has an air outlet A21 and an air outlet B22. The ends of the second air duct 122 and the fourth air duct 124 that are connected to the outside are connected to the air outlet A21, and the ends of the first air duct 121 and the third air duct 123 that are connected to the inside are connected to the air outlet B22.

[0040] Specifically: the far-end of the first air duct 121 is connected to the air outlet B22, and then a pipe is connected to the air outlet B22 to connect to the indoor environment; the far-end of the fourth air duct 124 is connected to the air outlet A21, and then a pipe is connected to the air outlet A21 to connect to the outdoor environment; so as to make the structure reasonable and simple.

[0041] 1. This air conditioner unit achieves the reversal of the fresh air inlet and outlet without using a complex motion mechanism, resulting in lower cost and higher reliability of the mechanism;

[0042] 2. The airflow channel is reversed by two baffles 131 that rotate synchronously in the same direction;

[0043] 3. Using a single stepper motor to drive two baffles 131 mounted on the same axis and rotating simultaneously at the same angle to open or close the channel results in a simpler structure.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A fresh air inlet / outlet reversing structure, comprising a centrifugal fan, characterized in that, It also includes a duct body, which has a first duct, a second duct, a third duct and a fourth duct. The air inlet of the centrifugal fan is connected to one end of the first duct and the second duct, and the air outlet of the centrifugal fan is connected to one end of the third duct and the fourth duct. The other ends of the first duct and the third duct are connected to the indoor environment, and the other ends of the second duct and the fourth duct are connected to the outdoor environment. It also includes a switching structure for switching the air duct conduction state between the first and third air ducts and between the second and fourth air ducts.

2. The fresh air inlet / outlet reversing structure according to claim 1, characterized in that, Both of the aforementioned switching structures are synchronously driven by the same driving structure.

3. The fresh air inlet / outlet reversing structure according to claim 2, characterized in that, One port of the second air duct is connected to the near-fan side of the first air duct, and its other port is connected to the far-fan side of the fourth air duct. One port of the third air duct is connected to the far-fan side of the first air duct, and its other port is connected to the near-fan side of the fourth air duct.

4. The fresh air inlet / outlet reversing structure according to claim 3, characterized in that, The first air duct has a first guide port on the far-fan side, and the fourth air duct has a second guide port on the far-fan side that is coplanar with the first guide port. The plane where the third air duct connects to the far-fan side of the first air duct is arranged perpendicular to the plane where the first guide port is located. The port where the second air duct connects to the near-fan side of the first air duct is arranged coplanarly with the port where the third air duct connects to the far-fan side of the first air duct. The two guide switching structures are arranged coplanarly.

5. A fresh air inlet / outlet reversing structure according to claim 4, characterized in that, The first and fourth air ducts are both straight air ducts, while the second and third air ducts are both multi-fold air ducts.

6. The fresh air inlet / outlet reversing structure according to claim 5, characterized in that, The second and third air ducts are closely connected and located between the first and fourth air ducts.

7. A fresh air inlet / outlet reversing structure according to any one of claims 2-6, characterized in that, Both of the aforementioned conduction switching structures include baffles, which are arranged on the same plane and are both connected to the drive structure.

8. A fresh air inlet / outlet reversing structure according to claim 7, characterized in that, The drive structure includes a drive shaft connected between two baffles and a driver connected to the drive shaft.

9. A cabinet air conditioner, characterized in that, Includes a fresh air inlet / outlet reversing structure as described in any one of claims 1-8.

10. An air conditioner cabinet unit according to claim 9, characterized in that, It also includes a housing and a cover plate located on the bottom side of the back of the housing. The air duct body is connected to the inside of the cover plate, and air outlet A and air outlet B are formed on the cover plate. The ends of the second and fourth air ducts that are connected to the outside are connected to air outlet A, and the ends of the first and third air ducts that are connected to the inside are connected to air outlet B.

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