36results about How to "Realize "shower" cooling experience" patented technology

The invention provides a vertical air conditioner indoor unit. The vertical air conditioner indoor unit comprises a shell, an air duct, a flow guide part and an air inducing channel; the shell is provided with an air supply opening, a first air inlet and a second air inlet; the inner wall, close to an air outlet, of the air duct is in a gradually-shrinking shape with a flow cross section graduallybecoming smaller in the airflow direction; the flow guide part is arranged in the air duct, an annular air outlet gap is defined by the flow guide part and a gradually-reduced part of the air duct, and the flow guide part is used for guiding airflow to the annular air outlet gap so that the airflow can be gradually gathered towards the center of the airflow under the guidance of the inner wall ofthe air duct and flow out of the air outlet and the air supply opening; and the air inducing channel is formed between the shell and the air duct and is provided with an inlet end communicated with the second air inlet and an outlet end communicated with the air supply opening, and indoor air enters the shell through the second air inlet and is guided to the air supply opening through the air inducing channel. The vertical air conditioner indoor unit is stronger in wind power and farther in air supply distance.

The invention provides a vertical air conditioner indoor unit which comprises a shell, an air duct and a flow guide part. A first air supply outlet and a second air supply outlet are formed in the front side of the shell. the air duct is arranged in the shell and provided with an air inlet, a first air outlet and a second air outlet, the first air outlet faces the first air supply outlet, the second air outlet faces the second air supply outlet, and the air duct is used for guiding airflow in the shell to the first air supply outlet and the second air supply outlet; the inner wall, close to the first air outlet, of the air duct is in a gradually-shrinking shape with the flow cross section gradually becoming smaller in the airflow direction; and the flow guide part is arranged in the air duct, an annular air outlet gap is defined by the flow guide part and a gradually-reduced part of the air duct, and the flow guide part is used for guiding airflow to the annular air outlet gap so thatthe airflow can be gradually gathered towards the center of the airflow under the guide of the inner wall of the air duct and sequentially flow out of the first air outlet and the first air supply outlet. The vertical air conditioner indoor unit is stronger in wind power and farther in air supply distance.

The invention provides a wall-mounted air conditioner indoor unit which comprises a casing and a flow guide piece; a first air supply outlet and an air duct connected with the first air supply outletare defined in the casing, and the inner wall, close to the first air supply outlet, of the air duct is gradually reduced such that the flow cross section of the air duct is gradually reduced in the airflow direction; the flow guide piece is arranged in the air duct, and an air outlet gap is defined between the flow guide piece and the inner wall of the air duct so that the air supply airflow blown to the first air supply outlet is guided to the inner wall of the air duct, and the air supply airflow gradually flows out of the first air supply outlet towards the airflow center in a gathered mode under the guiding effect of the gradually-reduced part of the inner wall of the air duct; the flow guide piece is of a hollow structure, and spray holes are formed in the side, facing the first airsupply outlet, of the flow guide piece, and the flow guide piece is configured to produce water mist; and in the flowing process of the supply airflow, a negative pressure environment is formed at thespray holes, so that water mist is mixed into the supply airflow and blown out of the first air supply outlet together. The wall-mounted air conditioner indoor unit has better effects of long-distance air supply and strong air supply.

The invention provides a wall-mounted air-conditioner indoor unit, which comprises a housing and a flow guide element, wherein a first air supply opening and an air duct connected with the first air supply opening are defined in the housing; the inner wall, close to the first air supply opening, of the air duct is convergent to gradually diminish a flow passing section of the air duct in an airflow direction; the flow guide element is arranged in the air duct, and further, air outlet gaps are defined between the flow guide element and the inner wall of the air duct to guide an airflow blown tothe first air supply opening to the inner wall of the air duct, so that the airflow gradually flows, in an aggregation manner, out of the first air supply opening towards the center of the airflow under the guidance of convergent parts of the inner wall of the air duct; and further, the flow guide element is configured to be movable relative to the air duct, so that the air outlet gaps are adjustable. The wall-mounted air-conditioner indoor unit provided in the invention has better long-distance air supply and strong air supply effects.

The invention provides a vertical air conditioner indoor unit which comprises a shell, an air flue and a flow guiding piece. The inner wall, near an air outlet, of the air flue is in a tapered shape with the flow cross section being decreased gradually along an airflow direction; the flow guiding piece is arranged in the air flue; an annular air outlet gap is defined by the flow guiding piece andthe tapered part of the air flue; the flow guiding piece is used for guiding air flows to the annular air outlet gap, so that the air flows are guided by the inner wall of the air flue so as to be gradually gathered towards an airflow center direction and sequentially flow out of the air outlet and the air supply outlet; the flow guiding piece is formed by rotating a flow guiding line for a circlearound a horizontal central axis; and the flow guiding line comprises a first convex arc-shaped segment, a second concave arc-shaped segment, a third convex arc-shaped segment, a fourth convex arc-shaped segment and a fifth convex arc-shaped segment which are smoothly connected in sequence. The vertical air conditioner indoor unit provided by the invention has stronger wind force and longer air supply distance.

The invention provides a wall-mounted type air conditioner indoor unit. The wall-mounted type air conditioner indoor unit comprises a shell provided with an air outlet, an outer air deflector rotationally installed on the shell and used for opening and closing the air outlet, and an inner air deflector which comprises an air deflector body rotationally installed on the shell and an air raising part arranged on a first side face of the air deflector body and used for guiding an air supply stream flowing out from the shell to obliquely flow out in the front upper direction when the inner air deflector is under the condition that the first side face is in a front air guide state. By the adoption of the wall-mounted type air conditioner indoor unit, cold air can be blown upwards and hot air can be blown downwards.

The invention provides a wall-mounted air conditioner indoor unit. The wall-mounted air conditioner indoor unit comprises a machine shell, wherein a plurality of first air supply ports are defined inthe front portion of the machine shell, an air duct communicating with the plurality of first air supply ports is defined in the machine shell, and the inner wall, close to the first air supply ports,of the air duct is in a gradually-reduced shape enabling the overflowing section of the air duct to be gradually reduced in the airflow direction; and a plurality of flow guide parts, wherein each flow guide part corresponds to one first air supply port and is arranged in the air duct, and an air outlet gap is defined between each flow guide part and the inner wall of the air duct, so that airflow blown to the corresponding first air supply port is guided to the inner wall of the air duct, and the airflow gradually flows out of the first air supply port towards an airflow center in a gatheredmanner under the guidance of the gradually-reduced portion on the inner wall of the air duct. Each flow guide part is configured to move in the front-back direction so as to be close to or away fromthe corresponding first air supply port, so that the size of the air outlet gap is adjustable. The wall-mounted air conditioner indoor unit has better long-distance air supply and strong air supply effects.

The invention provides a wall-mounted air conditioner indoor unit. The indoor unit comprises a shell, a volute tongue, a structural part and a flow guide part. A first air supply outlet is mounted atthe front side of the shell. The volute tongue is arranged in the shell, and the front end of the volute tongue extends to the position close to the upper portion of the first air supply outlet. The structural part is arranged in the shell, the front end of the structural part is close to the lower portion of the first air supply outlet, so that the structural part and the volute tongue jointly define an air outlet duct, and the inner wall, close to the first air supply outlet, of the air outlet duct is in a gradual shrinking shape with the overflowing section gradually becoming smaller in theairflow direction. The flow guide part is arranged in the air outlet duct, an air outlet gap is defined by the flow guide part and the gradually-shrinking part of the air outlet duct, and the flow guide part is used for guiding airflow to the air outlet gap, so that the airflow is guided by the inner wall of the air outlet duct to be gradually blown out of the first air supply outlet towards thecenter of the airflow in a gathered manner. The wall-mounted air conditioner indoor unit is longer in air supply distance and higher in air supply capacity.

The invention provides a wall-mounted air conditioner indoor unit. The wall-mounted air conditioner indoor unit comprises a machine shell, wherein first air supply ports and an air duct connected withthe first air supply ports are defined in the machine shell, and the inner wall, close to the first air supply ports, of the air duct is in a gradually-reduced shape enabling the overflowing sectionof the air duct to be gradually reduced in the airflow direction; and flow guide parts, wherein the flow guide parts are arranged in the air duct, and air outlet gaps are defined between the flow guide parts and the inner wall of the air duct so as to guide air supply airflow blown to the first air supply ports to the inner wall of the air duct and enable the air supply airflow to gradually flow out of the first air supply ports towards an airflow center in a gathered manner under guidance of the gradually-reduced portion on the inner wall of the air duct. Each flow guide part is of a hollow structure, air outlets are formed in the sides, facing the first air supply ports, of the flow guide parts, and the flow guide parts are configured to introduce or produce adjusting airflow; and in theflowing process of the air supply airflow, a negative-pressure environment is formed at the air outlets, so that the adjusting airflow is promoted to be mixed into the air supply airflow and blown out of the first air supply ports together. The wall-mounted air conditioner indoor unit has better long-distance air supply and strong air supply effects.

The invention provides a wall-mounted air-conditioner indoor unit, which comprises a housing and a flow guide element, wherein a first air supply opening and an air duct connected with the first air supply opening are defined in the housing; the inner wall, close to the first air supply opening, of the air duct is in a convergent shape that a flow passing section is gradually diminished in an airflow direction; and the flow guide element is arranged in the air duct, and further, air outlet gaps are defined between the flow guide element and inner wall of the air duct to guide an airflow blownto the first air supply opening to the inner wall of the air duct, so that the airflow gradually flows, in an aggregation manner, out of the first air supply opening towards the center of the airflowunder the guidance of convergent parts of the inner wall of the air duct. The wall-mounted air-conditioner indoor unit provided in the invention has better long-distance air supply and strong air supply effects.

The invention provides a vertical air conditioner indoor unit which comprises a shell, an air flue, a flow guiding piece and a drive mechanism. The front side of the shell is provided with a first airsupply outlet; the air flue is arranged in the shell, is provided with an air inlet and a first air outlet facing the first air supply outlet, and is used for guiding an air flow in the shell to thefirst air supply outlet; the inner wall, near the first air outlet, of the air flue is in a tapered shape with the flow cross section being decreased gradually along an airflow direction; the flow guiding piece is arranged in the air flue in an up-and-down horizontal movement way; an annular air outlet gap is defined by the flow guiding piece and the tapered part of the air flue, so that air flowsare guided by the inner wall of the air flue so as to be gradually gathered towards an airflow center direction and sequentially flow out of the first air outlet and the first air supply outlet; andthe drive mechanism is used for driving the flow guiding piece to move horizontally up and down so as to adjust the the sizes of air outlet cross sections of a top section and a bottom section of theannular air outlet gap, so that an air supply angle of the first air supply outlet is changed. The vertical air conditioner indoor unit provided by the invention has a better long-distance air supplyeffect and a strong air supply effect.

The invention provides a vertical air conditioner indoor unit which comprises an air supply body, an air supply outlet in the front side of the air supply body is long circular, and the inner wall, close to the air supply outlet, of the air supply body is in a gradually-reduced shape with an overflowing section gradually reduced in the airflow direction. A flow guide piece is arranged on the rearside of the air supply outlet and comprises a front end face, two first flow guide faces and two second flow guide faces, and the two first flow guide faces and the two second flow guide faces extendbackwards from the upper side, the lower side and the two transverse sides of the front end face respectively. The front end face is long-circular. An annular air outlet gap is defined by the flow guide piece and the gradually-shrinking part of the air supply body, the flow guide piece guides airflow to the annular air outlet gap, and the airflow is guided by the inner wall of the air supply bodyto gradually gather towards an airflow center. The first flow guide faces extend from back to front, are gradually far away from the central horizontal symmetric surface of the flow guide piece and each first flow guide face comprise a first concave arc-shaped section and a second convex arc-shaped section which are connected with each other. The second flow guide faces extend from back to front,are gradually far away from the central longitudinal vertical symmetrical surface of the flow guide piece, and each second flow guide face comprises a concave third arc-shaped section, a convex fourtharc-shaped section and a convex fifth arc-shaped section which are connected with one another.

The invention provides a vertical air conditioner indoor unit. The vertical air conditioner indoor unit comprises an air supply body and a flow guide piece. A front side air supply outlet is long circular. The inner wall, close to the air supply outlet, of the air supply body is in a gradually-reduced shape with an overflowing section gradually reduced in the airflow direction. The flow guide piece is arranged on the rear side of the air supply outlet and comprises a front end face, two first flow guide faces and two second flow guide faces. The first flow guide faces and the second flow guidefaces extend backwards from the upper side, the lower side and the two transverse sides of the front end face respectively. An annular air supply outlet gap is defined by the flow guide piece and a gradually-shrinking part of the air supply body. The flow guide piece guides airflow to the annular air supply outlet gap, and the airflow is guided by the inner wall of the air supply body to be gradually gathered towards an airflow center. The first flow guide faces extends from back to front, is gradually far away from a central horizontal symmetric surface of the flow guide piece and comprisesa first concave arc section, a second convex arc section and a horizontal straight line section which are connected; the second flow guide face extends from back to front, is gradually far away from the central longitudinal vertical symmetrical surface of the flow guide piece, and comprises a concave third arc-shaped section, a convex fourth arc-shaped section and a convex fifth arc-shaped sectionwhich are connected with one another.

The present invention provides a vertical air conditioner indoor unit, which includes: a housing, an air duct, a first air guide and a second air guide; wherein the air duct is configured such that the bottom area of ​​the first air outlet gap The ascending angle of the segment airflow is greater than the descending angle of the airflow at the top section so that the airflow at the bottom section of the first air outlet gap drives the airflow at the rest of the sections to flow forward and upward together, and / or the air duct is configured to Make the downward angle of the airflow in the top section of the second air outlet gap greater than the upward angle of the airflow in the bottom section so that the airflow in the top section of the second air outlet gap drives the airflow in the other sections to tilt forward and downward together flow. In the vertical air conditioner indoor unit of the present invention, by designing the shape of the upper and lower parts of the air duct, the cold air rises up to avoid the human body during cooling, and the warm air falls downward without directly blowing the human body during heating.

The invention provides a wall-mounted air conditioner indoor unit, which includes a casing, which defines a first air supply port and an air duct connected to the first air supply port. A tapered shape with a gradually decreasing direction; and a flow guide member, which is arranged in the air duct and defines an air outlet gap with its inner wall, so as to guide the air flow toward the first air supply port to the inner wall of the air duct, so that the air flow gradually increases on the inner wall of the air duct. Under the guidance of the constricted part, it gradually flows out of the first air supply port in a convergent manner toward the center of the airflow. The wall-mounted air conditioner indoor unit of the present invention has better long-distance air supply and strong air supply effects.

The present invention provides a vertical air-conditioning indoor unit, which comprises: a casing, on which an air inlet and an air supply port are opened, and the inner wall of the casing adjacent to the air supply port is in a tapered shape in which the flow cross section gradually becomes smaller along the airflow direction; and a deflector, which is arranged in the housing and defines an annular air outlet gap with its tapered part, and the deflector is used to guide the airflow to the annular air outlet gap, so that the airflow gradually moves toward the center of the airflow under the guidance of the inner wall of the housing The direction converges to blow out the air supply port. The vertical air conditioner indoor unit of the present invention has better effects of long-distance air supply and strong air supply.

The present invention provides a wall-mounted air-conditioning indoor unit, comprising: a housing with a first air supply port opened on its front side; The upper part of the air supply port; the structural member is arranged in the housing, the front end of the structural member is close to the lower part of the first air supply port so that the structural member and the volute tongue jointly define an air outlet duct, and The inner wall of the air outlet duct adjacent to the first air supply port is tapered with the flow cross section gradually decreasing along the airflow direction; There is an air outlet gap, and the deflector is used to guide the airflow to the air outlet gap, so that the airflow is gradually blown out of the first air outlet in a converging direction toward the center of the airflow under the guidance of the inner wall of the air outlet duct. tuyere. The air supply distance of the wall-mounted air conditioner indoor unit of the present invention is longer, and the air supply capacity is stronger.

The present invention provides a wall-mounted air conditioner indoor unit, which includes a casing, which defines a first air supply port and an air duct connected to the first air supply port. The flow section gradually becomes smaller along the air flow direction; and the air guide member is arranged in the air duct and defines an air outlet gap with its inner wall, so as to guide the air flow blowing toward the first air supply port to the inner wall of the air duct, so that the air flow is in the air duct. The tapered portion of the inner wall of the air duct is guided and gradually converges toward the center of the airflow and flows out of the first air supply port; and the air guide is configured to be movable relative to the air duct, so that the air outlet gap can be adjusted. The wall-mounted air conditioner indoor unit of the present invention has better long-distance air supply and strong air supply effects.

The present invention provides a wall-mounted air conditioner indoor unit, which includes a casing, which defines a first air supply port and an air duct connected to the first air supply port. The flow cross section gradually becomes smaller along the airflow direction; and the air guide piece is arranged in the air duct and defines an air outlet gap with its inner wall, so as to guide the air supply air flowing toward the first air supply port to the inner wall of the air duct, so that The air supply airflow is guided by the tapered part of the inner wall of the air duct and gradually flows out of the first air supply port toward the center of the airflow; The regulated airflow is introduced or prepared; and the air supply airflow forms a negative pressure environment at the air outlet during the flow process, so that the regulated airflow is mixed into the air supply airflow and blown out of the first air supply port together. The wall-mounted air conditioner indoor unit of the present invention has better long-distance air supply and strong air supply effects.

The invention provides a wall-mounted air conditioner indoor unit, which includes a casing, which defines a first air supply port and an air duct connected to the first air supply port, and the inner wall of the air duct adjacent to the first air supply port is for the passage of the air duct. The flow section gradually becomes smaller along the air flow direction; and the air guide member is arranged in the air duct and defines an air outlet gap with its inner wall, so as to guide the air flow blowing toward the first air supply port to the inner wall of the air duct, so that the air flow is in the air duct. Guided by the tapered part of the inner wall of the air duct, it gradually flows out of the first air supply port in a convergent manner toward the center of the air flow; and a cavity is formed inside the air guide, and an air inlet hole and an air outlet hole that communicate with the cavity are opened to facilitate the airflow inside the casing. It enters the cavity through the air inlet hole, and then blows out through the air outlet hole. The wall-mounted air conditioner indoor unit of the present invention has better long-distance air supply and strong air supply effects.

The present invention provides a vertical air conditioner indoor unit, comprising: a housing with a first air supply port and a second air supply port on the front side; an air duct arranged in the housing and having an air inlet and a first air outlet and a second air outlet, the first air outlet faces the first air outlet, the second air outlet faces the second air outlet, and the air duct is used to guide the airflow in the housing to the The first air supply port, the second air supply port, and the inner wall of the air duct adjacent to the first air outlet is tapered in which the flow cross section gradually becomes smaller along the air flow direction; and the flow guide is provided An annular air outlet gap is defined in the air duct and its tapered part, which is used to guide the airflow to the annular air outlet gap so that the airflow gradually converges toward the center of the airflow under the guidance of the inner wall of the air duct and flows out of the airflow in sequence. The first air outlet and the first air supply port. The vertical air conditioner indoor unit of the present invention has stronger wind force and longer air supply distance.

The present invention provides a vertical air conditioner indoor unit, comprising: a housing with an air supply port, a first air inlet and a second air inlet; A tapered shape whose cross-section gradually decreases along the direction of the airflow; a deflector is arranged in the air duct and defines an annular air outlet gap with its tapered part, and the deflector is used to guide the airflow to the annular air outlet The gap allows the airflow to gradually converge toward the center of the airflow under the guidance of the inner wall of the air duct and flow out of the air outlet and the air supply port; and an air induction channel, formed between the housing and the air duct, has The inlet end communicated with the second air inlet, and the outlet end communicated with the air supply port, indoor air enters the housing through the second air inlet and is guided to the air supply port by the air induction channel . The vertical air conditioner indoor unit of the present invention has stronger wind force and longer air supply distance.

The invention provides a vertical air-conditioning indoor unit, which comprises a housing, the lower part has an air inlet part, the upper middle part has a first air supply port and a second air supply port; The first air outlet of the tuyere and the second air outlet facing the second air outlet are used to guide the airflow in the casing to the first air outlet and the second air outlet, and the inner wall of the air duct near the first air outlet is an overflow section The tapered shape gradually becomes smaller along the airflow direction; the heat exchanger is arranged in the air duct; the fan is installed under the air inlet to promote the airflow entering the shell from the air inlet into the air duct through the air inlet; the deflector It is arranged in the air duct and defines an annular air outlet gap with its tapered part. The air guide is used to guide the airflow to the annular air outlet gap, so that the airflow is gradually converged towards the center of the airflow under the guidance of the inner wall of the air duct, and flows out in sequence. The first air outlet and the first air supply port. The vertical air conditioner indoor unit of the present invention has better effects of long-distance air supply and strong air supply.

The invention provides a wall-mounted air conditioner indoor unit, which includes a casing, a front part of which is defined with a plurality of first air supply ports, an air duct connected with the plurality of first air supply ports is defined inside, and the air duct is adjacent to the first air supply port The inner wall of the air duct is a tapered shape that gradually reduces the flow cross section of the air duct along the airflow direction; and a plurality of air guides, each of which corresponds to a first air supply port, which is arranged in the air duct and is defined by its inner wall. There is an air outlet gap to guide the air flow toward the corresponding first air supply port to the inner wall of the air duct, so that the air flow gradually flows out of the first air supply port in a convergent manner toward the center of the air flow under the guidance of the tapered part of the inner wall of the air duct; and each guide The flow element is configured to be movable in the front-rear direction so as to approach or move away from the first air outlet, so that the size of the air outlet gap can be adjusted. The wall-mounted air conditioner indoor unit of the present invention has better long-distance air supply and strong air supply effects.

The invention provides a vertical air conditioner indoor unit which comprises a shell, an air flue, a flow guiding piece and an air drawing pipe. The flow guiding piece is arranged in the air flue, and is close to a first air outlet; an air outlet gap is defined between the flow guiding piece and the air flue; an airflow in the shell arrives at the first air outlet through the air outlet gap; theflow guiding piece is of a hollow structure; multiple air outlet holes are formed in the front surface of the flow guiding piece at intervals; one end of the air drawing pipe communicates with the exterior of the shell, and the other end of the air drawing pipe communicates with the interior of the flow guiding piece; and indoor air flows into the air drawing pipe and then flows out of the flow guiding piece from the multiple air outlet holes to arrive at the first air outlet. According to the vertical air conditioner indoor unit provided by the invention, the air flow blown out of the first air outlet to the first air supply outlet is formed by mixing two parts of air flows with different sources, so that outlet air is more comfortable.

The present invention provides a vertical air-conditioning indoor unit, which comprises a shell with a first air supply port on its front side; an air duct, which is arranged in the shell, has an air inlet and a first air outlet facing the first air supply port. In order to guide the airflow in the casing to the first air supply port, the inner wall of the air duct adjacent to the first air outlet is in a tapered shape in which the flow cross section gradually becomes smaller along the airflow direction; In the channel, and its tapered part defines an annular air outlet gap, the air guide is used to guide the airflow to the annular air outlet gap, so that the airflow is guided by the inner wall of the airway, gradually converges towards the center of the airflow, and flows out of the first The air outlet and the first air supply port; and the driving mechanism, which is used to drive the deflector to translate up and down, so as to adjust the size of the air outlet section of the top section and the bottom section of the annular air outlet gap, thereby changing the air supply of the first air supply port angle. The vertical air conditioner indoor unit of the present invention has better effects of long-distance air supply and strong air supply.

The present invention provides a wall-mounted air conditioner indoor unit, which includes a casing, which defines a first air supply port and an air duct connected to the first air supply port. The flow cross section gradually becomes smaller along the airflow direction; and the air guide piece is arranged in the air duct and defines an air outlet gap with its inner wall, so as to guide the air supply air flowing toward the first air supply port to the inner wall of the air duct, so that The air supply airflow is guided by the tapered part of the inner wall of the air duct and gradually flows out of the first air supply port toward the center of the airflow; The water mist is prepared; and during the flow of the air supply air flow, a negative pressure environment is formed at the spray hole, so as to promote the water mist to be mixed into the air supply air flow and blown out of the first air supply port together. The wall-mounted air conditioner indoor unit of the present invention has better long-distance air supply and strong air supply effects.

The present invention provides a vertical air-conditioning indoor unit, comprising an air supply body, the front air supply port of which is oblong, and the inner wall of the air supply body adjacent to the air supply port is a tapered shape in which the flow cross section gradually becomes smaller along the air flow direction; The deflector is arranged on the rear side of the air outlet, including a front end surface and two first deflector surfaces and two second deflector surfaces respectively extending backward from the upper and lower sides and lateral sides of the front face, and the front end surface is oblong shape; the guide piece and the tapered part of the air supply body define an annular air outlet gap, and the guide piece guides the airflow to the annular air outlet gap, and the airflow is guided by the inner wall of the air supply body, and gradually converges towards the airflow center; the first guide The flow surface extends from the back to the front and gradually moves away from the central horizontal symmetrical plane of the flow guide and includes a connected first concave arc segment and a second convex arc segment; the second flow guide surface extends from the back to the front and It is gradually away from the central longitudinal vertical symmetry plane of the flow guide, and includes a third concave arc segment, a fourth convex arc segment and a fifth arc segment convex.