Outdoor unit exhaust device, control method and outdoor unit

Abstract

The invention relates to the technical field of air conditioners, and provides an outdoor unit exhaust device, a control method and an outdoor unit. The outdoor unit exhaust device comprises a heat exchanger, an air guide plate and a fan; an air duct is arranged inside the heat exchanger; the multiple air deflectors are arranged at the bottom of the air duct in a surrounding mode, each air deflector is provided with a flow guide air opening, and each flow guide air opening is provided with a flow guide blade capable of being opened and closed and used for generating tangential airflow entering the air duct through the flow guide air openings; the fan is arranged at the top of the air duct and used for enabling tangential airflow in the air duct to form vortexes. Air flowing through all parts of the heat exchanger can be uniform, so that the heat exchange effect of the heat exchanger is improved, and the purpose of improving the energy efficiency of the air conditioner is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an outdoor unit exhaust device, a control method and an outdoor unit. Background Art

[0002] At present, when the fan on the top of the existing multi-split outdoor unit is in exhaust operation, negative pressure is formed inside the multi-split outdoor unit, drawing external air into the outdoor unit. However, this will cause more air to enter through the upper side of the heat exchanger, while less air will enter through the lower side, resulting in uneven heat exchange of the heat exchanger, poor heat exchange effect, and low air conditioning energy efficiency. Summary of the invention

[0003] The present invention provides an outdoor unit exhaust device, a control method and an outdoor unit, which can make the air flowing through each part of a heat exchanger uniform, thereby improving the heat exchange effect of the heat exchanger and achieving the purpose of improving the energy efficiency of the air conditioner.

[0004] The present invention provides an outdoor unit exhaust device, comprising:

[0005] A heat exchanger, wherein an air duct is provided on the inner side of the heat exchanger;

[0006] A plurality of air guide plates are arranged around the bottom of the air duct, each of the air guide plates is provided with an air guide port, and each of the air guide ports is provided with an openable and closable air guide blade for generating a tangential airflow entering the air duct through the air guide port;

[0007] The fan is arranged at the top of the air duct and is used to make the tangential airflow in the air duct form a vortex.

[0008] An outdoor unit exhaust device according to the present invention also includes:

[0009] A plurality of wind speed sensors, wherein the heat exchanger is divided into a plurality of heat exchange bodies along the height direction, and each of the heat exchange bodies is provided with the wind speed sensor for detecting the wind speed of air entering the air duct through the outside of the heat exchange body;

[0010] The controller is electrically connected to the guide vane, the fan and the wind speed sensor respectively, and is used to control the rotation speed of the fan and the opening of the guide vane according to the detected air speed.

[0011] According to an outdoor unit exhaust device provided by the present invention, three wind speed sensors are provided, and the three wind speed sensors are respectively provided at the upper heat exchange body, the middle heat exchange body and the lower heat exchange body of the heat exchanger.

[0012] According to an outdoor unit exhaust device provided by the present invention, the guide air outlet is provided with a plurality of guide blades arranged side by side, and the guide blades are rotatable.

[0013] According to an outdoor unit exhaust device provided by the present invention, when the guide blade opens the guide air outlet, the rotation angle of the guide blade is between 10° and 60°.

[0014] According to an outdoor unit exhaust device provided by the present invention, four air guide plates are provided, and along the circumferential direction, the same end of the four air guide plates is respectively provided with the air guide ports.

[0015] The present invention also provides a control method for the outdoor unit exhaust device, comprising:

[0016] Obtaining the wind speed of air entering the air duct through the outside of the heat exchanger;

[0017] The rotation speed of the fan and the opening of the guide vanes are controlled according to the acquired air speed.

[0018] According to a control method for an outdoor unit exhaust device provided by the present invention, the heat exchanger includes an upper heat exchange body, a middle heat exchange body and a lower heat exchange body, and the air speed includes a first speed of air entering the air duct through the outer side of the upper heat exchange body, a second speed of air entering the air duct through the outer side of the middle heat exchange body, and a third speed of air entering the air duct through the outer side of the lower heat exchange body;

[0019] The step of controlling the rotation speed of the fan and the opening of the guide vane according to the acquired air speed comprises:

[0020] When the first wind speed is less than a first target setting value, adjusting the speed of the fan;

[0021] In a case where the first wind speed is greater than or equal to a first target setting value, if the second wind speed and the third wind speed are both less than the first target setting value, the opening of the guide vane is adjusted.

[0022] A control method for an outdoor unit exhaust device according to the present invention further includes:

[0023] In the case where the first wind speed is greater than or equal to the first target setting value, if the second wind speed and the third wind speed are both greater than or equal to the first target setting value, and the difference between the first wind speed and the first target setting value, the difference between the second wind speed and the first target setting value, and the difference between the third wind speed and the first target setting value are all greater than the second target setting value, adjust the speed of the fan.

[0024] The present invention also provides an outdoor unit, comprising: the above-mentioned outdoor unit exhaust device.

[0025] The outdoor unit exhaust device, control method and outdoor unit provided by the present invention are characterized in that an air duct is provided on the inner side of a heat exchanger, a plurality of air guide plates are arranged around the bottom of the air duct, each air guide plate is provided with an air guide port, each air guide port is provided with an openable and closable air guide blade, which can generate a tangential airflow entering the air duct through the air guide port, and a fan is arranged at the top of the air duct. When the fan is running, the multiple tangential airflows entering the air duct through the multiple air guide ports in a circumferential direction can be formed into vortices. Under the action of the vortex, the air flowing into the air duct through the outer side of the heat exchanger can be made to be similar at different heat exchange main body parts of the heat exchanger, so that the air flowing through various parts of the heat exchanger is uniform, thereby enhancing the heat exchange between the refrigerant medium and the air of the heat exchanger, improving the heat exchange effect of the heat exchanger, and achieving the purpose of improving the energy efficiency of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a structural schematic diagram of the outdoor unit exhaust device provided by the present invention;

[0028] Figure 2 It is a schematic diagram of the working principle of the outdoor unit exhaust device provided by the present invention;

[0029] Figure 3 It is one of the flow charts of the control method of the outdoor unit exhaust device provided by the present invention;

[0030] Figure 4 This is the second flow chart of the control method of the outdoor unit exhaust device provided by the present invention.

[0031] Reference numerals:

[0032] 1: Heat exchanger;

[0033] 101: upper heat exchange body; 102: middle heat exchange body; 103: lower heat exchange body;

[0034] 2: air guide plate; 201: air guide port; 202: air guide blade;

[0035] 3: Fan; 4: Air duct; 5: Tangential airflow; 6: Wind speed sensor. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0039] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0041] Combine the following Figure 1-Figure 4 The outdoor unit exhaust device, control method and outdoor unit of the present invention are described.

[0042] According to an embodiment of the first aspect of the present invention, referring to Figure 1 and Figure 2 As shown, the outdoor unit exhaust device provided by the present invention mainly includes: a heat exchanger 1, a plurality of air guide plates 2, a fan 3 and other components.

[0043] The inner side of the heat exchanger 1 is provided with an air duct 4. Specifically, the heat exchanger 1 is generally a U-shaped structure, which is vertically arranged in the casing of the outdoor unit, and the U-shaped opening side of the heat exchanger 1 can be connected to the front casing of the outdoor unit to form a ring-shaped air duct 4. The purpose of regulating the air temperature is achieved by heat exchange between the refrigerant medium in the heat exchanger 1 and the air.

[0044] A plurality of air guide plates 2 are arranged below the heat exchanger 1 and around the bottom of the air duct 4. Each air guide plate 2 is provided with an air guide port 201. Each air guide port 201 is provided with an openable and closable air guide blade 202. The air guide blade 202 is used to generate a tangential airflow 5 entering the air duct 4 through the air guide port 201. When the air guide blade 202 opens the air guide port 201, multiple tangential airflows 5 enter the air duct 4 from around the bottom of the air duct 4. The fan 3 is arranged above the heat exchanger 1 and located at the top of the air duct 4. When the fan 3 is running, the multiple tangential airflows 5 in the air duct 4 can form a vortex.

[0045] It is understandable that if Figure 2 As shown, the tangential airflow 5 is an airflow that obliquely enters the air duct 4 through the guide air port 201 and is tangential to the inner plate surface of the air guide plate 2 under the coordinated action of the guide blade 202 and the fan 3.

[0046] Specifically, when the fan 3 is in operation, negative pressure is generated, and air enters the air duct 4 from the guide air ports 201 on the outer side and bottom of the coil gap of the heat exchanger 1. However, since the flow area of ​​the guide air ports 201 is larger than the coil gap of the heat exchanger 1, the wind resistance of the guide air ports 201 is smaller than the wind resistance of the coil gap of the heat exchanger 1. When the fan 3 is initially operated, more air enters the air duct 4 through the guide air ports 201, and a tangential airflow 5 is generated under the action of the guide blades 202. As the fan 3 operates, the multiple tangential airflows 5 that enter the air duct 4 circumferentially through the multiple guide air ports 201 can form a vortex airflow, i.e., a vortex. Under the action of the vortex, the air flowing into the air duct 4 through the outer side of the coil gap of the heat exchanger 1 can be made to be close to the same at different heat exchange main parts of the heat exchanger 1, thereby enhancing the heat exchange effect between the refrigerant medium and the air of the heat exchanger 1.

[0047] Therefore, the outdoor unit exhaust device provided in the embodiment of the present invention mainly uses the cooperation of the guide blades 202 and the fan 3, utilizes the bottom guide air port 201 to take in air, and exhausts air through the top fan 3 to form a vortex in the air duct 4 on the inner side of the heat exchanger 1. Under the action of the vortex, the air flowing into the air duct 4 through the outer side of the heat exchanger 1 can be made to tend to be the same at different heat exchange main parts of the heat exchanger 1, so that the air flowing through various parts of the heat exchanger 1 is uniform, thereby enhancing the heat exchange between the refrigerant medium of the heat exchanger 1 and the air, improving the heat exchange effect of the heat exchanger, and achieving the purpose of improving the energy efficiency of the air conditioner.

[0048] According to one embodiment of the present invention, referring to Figure 1 and Figure 2 As shown, the outdoor unit exhaust device of the present invention also includes: multiple wind speed sensors 6 and a controller. The heat exchanger 1 is divided into multiple heat exchange bodies along the height direction, and each heat exchange body is provided with a wind speed sensor 6 corresponding to each other. The wind speed sensor 6 is used to detect the air speed entering the air duct 4 through the outside of different heat exchange bodies; the controller is electrically connected to the guide vane 202, the fan 3 and the multiple wind speed sensors 6 respectively, and is mainly used to control the speed of the fan 3 and the opening of the guide vane 202 according to the detected air speed, so as to improve the uniformity of the air flowing through different heat exchange body parts of the heat exchanger 1, improve the heat exchange effect of the heat exchanger 1, and achieve the purpose of improving the energy efficiency of the air conditioner. The specific control process can be referred to the following control method.

[0049] According to one embodiment of the present invention, three wind speed sensors 6 are provided. Accordingly, the heat exchanger 1 includes three heat exchange bodies, namely an upper heat exchange body 101, a middle heat exchange body 102 and a lower heat exchange body 103. The three wind speed sensors 6 are respectively provided in the upper heat exchange body 101, the middle heat exchange body 102 and the lower heat exchange body 103 of the heat exchanger 1. The three wind speed sensors 6 can respectively detect the wind speed of air entering the air duct 4 through the outside of different heat exchange bodies of the heat exchanger 1.

[0050] According to one embodiment of the present invention, referring to Figure 1 and Figure 2 As shown, the guide air port 201 is provided with a plurality of guide blades 202 in parallel, and the guide blades 202 are rotatable to adjust the opening of the guide air port 201, and when the guide air port 201 is opened, the air can be simultaneously obliquely entered into the air duct 4 through the guide air port 201 between the plurality of guide blades 202, so that a plurality of tangential air flows 5 entering into the air duct 4 can be generated at each guide air port 201, and under the action of the fan 3, a vortex with stronger wind force can be generated, thereby increasing the amount of air entering the air duct 4 through the outer sides of different heat exchange bodies of the heat exchanger 1, and further improving the heat exchange effect.

[0051] According to an embodiment of the present invention, when the guide blade 202 opens the guide air port 201 , the rotation angle of the guide blade 202 is between 10° and 60°. Such a design is conducive to generating vortex in the air duct 4 .

[0052] Specifically, when the guide blade 202 is closed, the guide blade 202 is flush with the air guide plate 2, and the rotation angle of the guide blade 202 is zero, that is, the opening is zero; when the guide blade 202 is rotated to open, the guide blade 202 is tilted relative to the air guide plate 2, and there is an angle between the guide blade 2 and the air guide plate 2, and the angle is between 10° and 60°.

[0053] According to one embodiment of the present invention, referring to Figure 2 As shown, four air guide plates 2 are provided, and along the circumferential direction, the same end of the four air guide plates 2 is respectively provided with a guide air port 201. For example, along the circumferential direction, the left end or the right end of each air guide plate 2 is provided with a guide air port 201. Of course, in practical applications, the guide air port 201 can also be provided at the middle of the air guide plate 2. In this way, multiple tangential airflows 5 can enter the air duct 4 along the four sides, and form vortices under the action of the fan 3.

[0054] According to one embodiment of the present invention, referring to Figure 1 and Figure 2 As shown, the fan 3 is arranged at the center of the air duct 4, which can improve the uniformity of the eddy wind force, thereby further improving the uniformity of the air flowing through different heat exchange main parts of the heat exchanger 1, improving the heat exchange effect of the heat exchanger 1, and achieving the purpose of improving the energy efficiency of the air conditioner.

[0055] The control method of the outdoor unit exhaust device provided by the present invention is described below. The control method of the outdoor unit exhaust device described below and the outdoor unit exhaust device described above can be referred to each other.

[0056] According to an embodiment of the second aspect of the present invention, referring to Figure 3As shown, the present invention also provides a control method for the outdoor unit exhaust device of the above embodiment, which mainly includes the following steps:

[0057] S100, obtaining the wind speed of the air entering the air duct 4 through the outside of the heat exchanger 1;

[0058] S200 , controlling the rotation speed of the fan 3 and the opening of the guide vane 202 according to the acquired air speed.

[0059] Specifically, the heat exchanger 1 includes an upper heat exchange body 101, a middle heat exchange body 102 and a lower heat exchange body 103. Accordingly, the detected air speed includes a first wind speed of the air entering the air duct 4 through the outside of the upper heat exchange body 101, a second wind speed of the air entering the air duct 4 through the outside of the middle heat exchange body 102, and a third wind speed of the air entering the air duct 4 through the outside of the lower heat exchange body 103.

[0060] The step of controlling the rotation speed of the fan 3 and the opening of the guide vane 202 according to the acquired air speed includes:

[0061] When the first wind speed is less than the first target setting value, adjust the rotation speed of the fan 3; when the first wind speed is greater than or equal to the first target setting value, if the second wind speed and the third wind speed are both less than the first target setting value, adjust the opening of the guide vane 202.

[0062] Specifically, the first wind speed of the upper heat exchange body 101 closest to the fan 3 is first detected, and the detected first wind speed is compared with the first target setting value. When the first wind speed is less than the first target setting value, it means that the rotation speed of the fan 3 is relatively small. At this time, the rotation speed of the fan 3 should be increased to increase the first wind speed, for example, to reach the first target setting value.

[0063] When the detected first wind speed reaches the first target setting value, the second wind speed of the middle heat exchange body 102 and the third wind speed of the lower heat exchange body 103 are further judged, and the detected second wind speed and the third wind speed are compared with the first target setting value. When the second wind speed and the third wind speed are both less than the first target setting value, it means that the opening of the bottom guide blade 202 may be too large, and the air enters the air duct 4 through the bottom guide air port 201, or the opening of the bottom guide blade 202 may be too small, resulting in no vortex formed inside the air duct 4, so that more air enters the air duct 4 through the outside of the upper heat exchange body 101, and less air enters the air duct 4 through the outside of the middle heat exchange body 102 and the lower heat exchange body 103. At this time, the opening of the guide blade 202 can be adjusted to reach a suitable target setting opening, for example, it can be 45°, so that a vortex is formed inside the air duct 4. Under the action of the vortex, the air in different heat exchange bodies of the heat exchanger 1 tends to be the same, thereby improving the heat exchange effect.

[0064] Furthermore, the control method of the outdoor unit exhaust device of the present invention further includes:

[0065] When the first wind speed is greater than or equal to the first target setting value, if the second wind speed and the third wind speed are both greater than or equal to the first target setting value, and the difference between the first wind speed and the first target setting value, the difference between the second wind speed and the first target setting value, and the difference between the third wind speed and the first target setting value are all greater than the second target setting value, adjust the speed of fan 3.

[0066] Specifically, when the first wind speed, the second wind speed, and the third wind speed all reach the first target setting value, if the difference between the first wind speed and the first target setting value, the difference between the second wind speed and the first target setting value, and the difference between the third wind speed and the first target setting value are all less than or equal to the second target setting value, it means that the deviation from the setting value is small, and the air distribution in the air duct 4 is relatively uniform at this time; if the difference between the first wind speed and the first target setting value, the difference between the second wind speed and the first target setting value, and the difference between the third wind speed and the first target setting value are all greater than the second target setting value, it means that the deviation from the setting value is large, there is no good vortex formation in the air duct 4, and the air distribution uniformity is poor. At this time, it is necessary to readjust the speed of the fan 3 so as to form a vortex inside the air duct 4 and improve the air distribution uniformity. The method of the present invention realizes the determination of the uniformity of the air in the air duct 4. When it is uneven, the speed of the fan 3 is readjusted, which is conducive to improving the heat exchange stability of the heat exchanger 1.

[0067] Therefore, the control method of the outdoor unit exhaust device provided in the embodiment of the present invention can form a vortex under the coordinated action of the fan 3 and the guide vane 202 by performing real-time detection of the air speed entering the air duct 4 from different parts of the heat exchanger 1, and adjusting the rotation speed of the fan 3 and the opening of the guide vane 202 according to the detected air speed, so that the outdoor air can flow evenly through different parts of the heat exchanger 1, thereby ensuring uniform heat exchange between the heat exchanger 1 and the outdoor air, thereby achieving the purpose of improving the energy efficiency of the air conditioner.

[0068] The control method of the outdoor unit exhaust device provided by the present invention is further described below with reference to a specific example. Figure 4 As shown, the process mainly includes the following steps.

[0069] (1) First, determine whether the first wind speed J of the air entering the air duct 4 through the outer side of the upper heat exchange body 101 is greater than or equal to the first target setting value I. If not, adjust the speed of the fan 3, for example, increase the speed of the fan 3; if so, execute the next step (2).

[0070] (2) Determine whether the second wind speed K of the air entering the air duct 4 through the outside of the middle heat exchange body 102 and the third wind speed L of the air entering the air duct 4 through the outside of the lower heat exchange body 103 are greater than or equal to the first target setting value I; if not, adjust the opening of the guide vane 202, for example, adjust the opening of the guide vane 202 to the target setting opening; if yes, execute the next step (3).

[0071] (3) Determine whether the difference between the first wind speed J, the second wind speed K and the third wind speed L and the first target setting value I is less than or equal to the second target setting value F. If so, it means that the fan 3 is operating normally and the exhaust device is operating normally; if not, readjust the speed of the fan 3.

[0072] According to an embodiment of the third aspect of the present invention, the present invention further provides an outdoor unit, comprising: the outdoor unit exhaust device of the above embodiment.

[0073] In addition, the outdoor unit also includes a casing, a side of the casing is provided with an air inlet, a top of the casing is provided with an air outlet, an outdoor unit exhaust device is arranged in the casing, and a fan 3 of the outdoor unit exhaust device is arranged at the air outlet on the top of the casing.

[0074] Specifically, outdoor air can enter the casing through the air inlet, and enter the air duct 4 on the inner side of the heat exchanger 1 through the guide air outlet 201 on the outer side and bottom of the heat exchanger 1. Under the coordinated action of the fan 3 and the guide blades 202, a vortex is formed, so that the outdoor air and the heat exchanger 1 can exchange heat evenly, and the air after heat exchange is discharged through the exhaust port.

[0075] In addition, a compressor and other components are also provided in the casing of the outdoor unit, which are conventional components in this field and will not be described in detail here.

[0076] Since the outdoor unit provided in the embodiment of the present invention includes the outdoor unit exhaust device of the above embodiment, it has all the technical effects of the outdoor unit exhaust device of the above embodiment, which will not be described in detail here.

[0077] According to another embodiment of the present invention, the present invention further provides an air conditioner, which mainly includes an indoor unit and the outdoor unit of the above embodiment, and the indoor unit is connected to the outdoor unit.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An outdoor unit exhaust device, characterized in that: include: A heat exchanger, wherein an air duct is provided on the inner side of the heat exchanger; A plurality of air guide plates are arranged around the bottom of the air duct, each of the air guide plates is provided with an air guide port, and each of the air guide ports is provided with an openable and closable air guide blade for generating a tangential airflow entering the air duct through the air guide port; The fan is arranged at the top of the air duct and is used to make the tangential airflow in the air duct form a vortex.

2. The outdoor unit exhaust device according to claim 1, characterized in that: Also includes: A plurality of wind speed sensors, wherein the heat exchanger is divided into a plurality of heat exchange bodies along the height direction, and each of the heat exchange bodies is provided with the wind speed sensor for detecting the wind speed of air entering the air duct through the outside of the heat exchange body; The controller is electrically connected to the guide vane, the fan and the wind speed sensor respectively, and is used to control the rotation speed of the fan and the opening of the guide vane according to the detected air speed.

3. The outdoor unit exhaust device according to claim 2, characterized in that: Three wind speed sensors are provided, and the three wind speed sensors are respectively provided at the upper heat exchange body, the middle heat exchange body and the lower heat exchange body of the heat exchanger.

4. The outdoor unit exhaust device according to claim 1, characterized in that: The guide air port is provided with a plurality of guide blades in parallel, and the guide blades are rotatable.

5. The outdoor unit exhaust device according to claim 4, characterized in that: When the guide blade opens the guide air outlet, the rotation angle of the guide blade is between 10° and 60°.

6. The outdoor unit exhaust device according to any one of claims 1 to 5, characterized in that: Four air guide plates are provided, and along the circumferential direction, the same end of the four air guide plates is respectively provided with the air guide ports.

7. A method for controlling an outdoor unit exhaust device according to any one of claims 1 to 6, characterized in that: include: Obtaining the wind speed of air entering the air duct through the outer side of the heat exchanger; The rotation speed of the fan and the opening of the guide vanes are controlled according to the acquired air speed.

8. The control method of the outdoor unit exhaust device according to claim 7, characterized in that: The heat exchanger comprises an upper heat exchange body, a middle heat exchange body and a lower heat exchange body, and the air speed comprises a first speed of air entering the air duct through the outer side of the upper heat exchange body, a second speed of air entering the air duct through the outer side of the middle heat exchange body, and a third speed of air entering the air duct through the outer side of the lower heat exchange body; The step of controlling the rotation speed of the fan and the opening of the guide vane according to the acquired air speed comprises: When the first wind speed is less than a first target setting value, adjusting the speed of the fan; In a case where the first wind speed is greater than or equal to a first target setting value, if the second wind speed and the third wind speed are both less than the first target setting value, the opening of the guide vane is adjusted.

9. The control method of the outdoor unit exhaust device according to claim 8, characterized in that: Also includes: In the case where the first wind speed is greater than or equal to the first target setting value, if the second wind speed and the third wind speed are both greater than or equal to the first target setting value, and the difference between the first wind speed and the first target setting value, the difference between the second wind speed and the first target setting value, and the difference between the third wind speed and the first target setting value are all greater than the second target setting value, adjust the speed of the fan.

10. An outdoor unit, characterized in that: include: An outdoor unit exhaust device according to any one of claims 1 to 6.

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