118results about How to "Long air supply distance" patented technology

The invention discloses an indoor machine of a two-tubular air conditioner, which comprises a housing, a left and a right tubular fan wheels, a heat exchanger, an air inlet and an air outlet, wherein the housing consists of a front panel assembly and a shell; the left and the right tubular fan wheels are vertically arranged in the housing; the heat exchanger is arranged in the housing and positioned at the rear side of the tubular fan wheels; the air inlet is arranged behind the housing and the air outlet is arranged in front of the housing; the shell is connected to the rear side of the front panel assembly, the inner side of the shell is provided with a box body corresponding to the heat exchanger; back parts of the box body and the shell protrude outwards, the protruding part of the box body is provided with the air inlet, and the protruding part of the shell is provided with an air inlet window corresponding to the air inlet; the heat exchanger is bent towards the protruding direction of the back of the box body and arranged at a position close to the air inlet; and the housing is also internally provided with a volute assembly positioned between the two tubular fan wheels, the volute assembly comprises a left volute, a right volute, and a connecting bulge for connecting the left volute and the right volute together, and the connecting bulge extends to the position close to the heat exchanger. The invention has the advantages of larger air inlet area, compact assembly, low cost, small noise and high heat exchange efficiency.

The invention discloses an air guide plate moving mechanism, an air-conditioner air output assembly and an air-conditioner. The air guide plate moving mechanism comprises a transmission rod extending along an axis, a sweeping mechanism used for driving the transmission rod to rotate around the axis, a push-out mechanism used for driving the transmission rod to move along the axis, and a transmission mechanism, wherein the input end of the transmission mechanism is connected with the transmission rod, and the output end of the transmission mechanism is used for being connected with an air guide plate, so that the air guide plate rotates relative to the transmission rod in the rotating process of the transmission rod. According to the air guide plate moving mechanism, the large air guide plate can be used at will, the air supply distance is long, and the air supply range is wide; a motor is arranged in the air-conditioner, and noise is low; the transmission rod can be solid, and both rigidity and strength can be improved greatly; a bending-resistant motor wire is not needed, the cost is reduced, and reliability is high; the connecting portion of a push rod and the air guide plate comprises few structures, so that the appearance can be small and exquisite; and few small bolts are needed, the appearance and strength are ensured, and the reliability and the assembling efficiency are improved.

The invention belongs to the technical field of air conditioner air supplying and discloses an air conditioner air guiding structure and an air conditioner. An upper cover of an outwards-convex structure is additionally arranged on a lower air guiding plate, hot air sent out by the air conditioner is guided to the front lower portion to flow by the upper air guiding plate, then, when the hot air passes through the surface of the upper cover, under the action of a coanda effect, hot airflow will flow close to the outwards-convex surface of the upper cover, the upper cover of the outwards-convex structure achieves the effect of further guiding the hot airflow to the ground, meanwhile, the process that the airflow passes through the upper cover is equivalent to lengthening an air supply channel of the air conditioner, and the air supply distance is longer. The hot airflow can reach the ground more easily after disengaging the air conditioner air guiding structure, the capacity of supplying hot air to the ground of the air conditioner is enhanced, indoor hot air is distributed more evenly, the phenomenon that the upper portion is hot and the lower portion is cold will not occur, and the user experience is improved.

The invention discloses an air supply device which comprises a shell, a motor, an oblique flow wind wheel, at least one axial flow wind wheel and a volute, wherein the shell is provided with a cylindrical cavity of which two ends are open; the motor is accommodated in the cylindrical cavity of the shell and is fixed through a motor bracket; the oblique flow wind wheel is arranged at one end of a motor shaft of the motor; the at least one axial flow wind wheel is arranged at the other end of the motor shaft; oblique flow fan blades are arranged on the oblique flow wind wheel; axial flow fan blades are arranged on the axial flow wind wheel; the volute is arranged corresponding to the axial flow wind wheel and the oblique flow wind wheel and is fixed on the inner wall of the shell; the motor bracket is fixed on the inner wall of the shell or the inner wall of the volute; and an air duct is formed by the axial flow fan blades, the oblique flow fan blades and the volute. The inner space of the shell can be effectively used; and meanwhile, the noise is easily reduced to a standard range under the condition that the air quantity is guaranteed, and the air supply distance is farther. The invention also discloses an air-conditioning indoor unit.

The invention relates to an air conditioner with a humidifying function, comprising an air inducing structure and a humidifying system, wherein the air inducing structure is used for dividing air on the traditional air duct scroll, and the air is induced from an air inducing hole and flows through the humidifying system; the humidifying system has rich water droplets to increase the humidity of the air which passes through the humidifying system; and the high-humidity air returns to an air inlet of the air conditioner, returns to the air duct scroll with other air together and is blown out of an air outlet to increase the humidity of the whole environment. The invention has simple structure and reasonably uses the internal space of the air conditioner, meanwhile, because partial air is only induced, the induced air still returns into an air duct finally, and therefore, the air conditioner has low influence for the total air and can evenly humidify.

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 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 discloses a floor-standing air conditioner, comprising: a casing, the front of the casing is provided with an air outlet and the rear of the casing is provided with an air inlet; a heat exchanger assembly is arranged in the casing and located at On the front side of the air inlet, the heat exchanger assembly includes a heat exchanger; the air duct assembly is arranged in the casing and is located between the heat exchanger and the air outlet, and the air duct assembly includes a centrifugal volute, a tubular volute, The motor assembly, the centrifugal wind wheel and the cross-flow wind wheel, the centrifugal wind wheel and the cross-flow wind wheel are arranged in the vertical direction, the centrifugal wind wheel is set in the centrifugal volute, the cross-flow wind wheel is set in the cross-flow volute, and the cross-flow volute The second ventilation port of the casing and the first ventilation port of the centrifugal volute are arranged corresponding to the air outlet, and the motor assembly is respectively connected with the centrifugal wind wheel and the cross-flow wind wheel to drive the centrifugal wind wheel and the cross-flow wind wheel to rotate. The floor-standing air conditioner of the present invention not only has a simple structure, but also has a long air supply distance, low noise and high comfort.

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 vertical air conditioner equipment comprising a cabinet, a first fan, a second fan, a lifting mechanism and a flow guide mechanism. The cabinet comprises a first shell and a second shell which are arranged oppositely. The first shell is provided with an air inlet. The second shell is provided with an upper air outlet and a lower air outlet. The first fan is arranged in the cabinet and is close to the first shell. The second fan is arranged in the cabinet and is close to the second shell. The lifting mechanism is arranged in the cabinet and can drive the first fan and / orthe second fan to move in the longitudinal direction, so that the first fan and the second fan are arranged oppositely or arranged in the longitudinal direction in a relative offset mode. The flow guide mechanism is arranged in the cabinet and corresponds to the first fan. According to the technical scheme, one the one hand, the air outlet efficiency of airflow driven by the first fan is higher, and on the other hand, operation noise of the vertical air conditioner equipment can be lowered.

The invention discloses an air conditioner cabinet, belongs to the technical field of air conditioners, and aims to solve the defects that a conventional device is slow in temperature adjustment speed and the like. The air conditioner cabinet comprises a first main air hole and a second main air hole, wherein the main air hole is communicated with the second main air hole through an air channel; fans are respectively arranged at the first main air hole and the second main air hole; when one of the first main air hole and the second main air hole is adopted to feed air, the other one is adopted to discharge air. Due to the structure that the air inlet and the air outlet of the air conditioner cabinet can be switched, air can be discharged from an upper part or a lower part according to use demands, hot air can be blown out from the lower part when heating is needed, the hot air at the lower part can be relatively rapidly mixed with cold air at the upper part, and cold air can be blown out from the upper part when cooling is needed, and can be relatively rapidly mixed with the hot air at the lower part, so that the indoor temperature adjustment speed can be accelerated, good user experience can be achieved, the comfort level can be increased, and the air discharge distance can be large.

The invention provides a downward-air-out type air conditioner indoor unit, a control method and an air conditioner. The air conditioner indoor unit comprises an air deflector, and a rotating mechanism connected with the air deflector The air deflector can be pushed out or retracted into an air outlet; during the downward air-out process, the air deflector is driven to be pushed out and rotated toa fixed air-out position; when the air deflector is located at the fixed air-out position, a minimum distance M between the air deflector and the edge of the air outlet is larger than or equal to 10mm, and meanwhile, an included angle theta between an end edge tangent line of the air-out end of the air deflector and a horizontal direction is located between 10 degrees to 60 degrees; and the air-out end of the air deflector discharges air upwards. According to the downward-air-out type air conditioner indoor unit, the control method and the air conditioner provided by the invention, the wind resistance can be reduced, and a blown-out airflow can be maximally attached onto a wall surface of a ceiling to flow so as to form a wall attachment effect, so that the occurrence of the phenomenon that wind is directly blown to a human body is prevented to an extreme, cold air covers an indoor space to a maximum range, and the indoor comfort level is improved maximally.

The invention discloses an air conditioning system and relates to the technical field of air conditioning. The air supply distance and the air supply speed of the air conditioning system in a fresh air mode are improved so that the heat exchange effect of the air conditioning system can be improved. The air conditioning system comprises an air duct compartment, wherein an indoor air return opening, an outdoor fresh air inlet and an air supply opening are formed in the air duct compartment, a heat exchanger is rotatably installed in the air duct compartment, the heat exchanger is positioned between the indoor air return opening and the air supply opening and between the outdoor fresh air inlet and the air supply opening, and the heat exchanger can be switched between a windward position anda windshield position. The air conditioning system is used for adjusting indoor air temperature, humidity and quality.

The invention discloses a suspended direct-air-blowing unit type air conditioning unit, comprising a refrigerating section and an electric control device for controlling the working of the refrigerating section, wherein an air supplying section for supplying hot air to the refrigerating section is arranged at the end part of the refrigerating section; and the refrigerating section is provided with an air supplying port for outputting cold air. The suspended direct-air-blowing unit type air conditioning unit disclosed by the invention is simple in structure and convenient to assemble, and can be perfectly applicable to places such as warehouses, plants, workshops and stations.

The invention discloses a device for testing the fireproof performance of an external facade of a building. The device comprises a simulation main wall with a window in the lower part, a combustion chamber, a combustor assembly arranged inside the combustion chamber, simulation wing walls arranged at two sides of the simulation main wall, a net rack arranged in a space formed by the simulation main wall and the two simulation wing walls, a heat flux sensor for measuring the intensity of heat flux, a thermocouple sensor hole site for measuring the temperature, and an environmental wind supply device located in front of the two simulation wing walls, wherein the combustion chamber is arranged beside the simulation main wall and is provided with an opening communicating with the window; and the heat flux sensor and the thermocouple sensor hole site are arranged on the net rack. The device is a simulation test device for the fireproof performance of the external facade of the building in different environmental wind speed environments for different forms of the external facades of high-rise or super high-rise buildings. Compared with the prior art, the device has the advantages that important test models can be provided for the coupling action influences of external facades forms of the buildings and the external environmental wind speeds on open overflow flame characteristics and the influences on the fireproof performance of the external facade, and the bank in the industry is filled.

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 discloses an environment wind field simulation unit and an environment wind field simulation system applied to fireproof performance test of a building exterior wall. The unit comprises a shell, and a transmission fan, electric air valves, a rectifying grating and an air supply duct which are sequentially distributed in the shell, wherein the transmission fan at least corresponds to the three electric air valves, the quantities of the rectifying grating and the air supply duct are equal to that of the electric air valves in a one-to-one correspondence manner, and a spherical nozzle is arranged on the tai lend of each air supply duct. The system comprises a plurality of environment wind field simulation units, a support and universal wheels for supporting and moving the units, and a control system used for controlling the air supply speed and direction of the system. Through the reasonable structural design, not only can the environment wind fields at different heights of the whole building exterior wall can be simulated in a reduced-scale manner, but also the environment wind field outside the firing layer can be simulated on a full-scale manner, thus providing basis and guarantee for accurately conducting the fireproof performance test of high-rise or ultrahigh-rise buildings.

The invention discloses an air conditioner control method and device, a storage medium and an air conditioner. The method comprises the steps of obtaining the current man-machine distance between theair conditioner and a user in the space where the air conditioner is located; according to the current man-machine distance, controlling the width of an air deflector of the air conditioner so that when the current man-machine distance is small, decreasing the current air supply distance of the air deflector or when the current man-machine distance is large, increasing the current air supply distance of the air deflector, wherein the air deflector comprises an upper air deflector (21) and a lower air deflector (22). According to the scheme, the problem that the air supply distance is limited due to the fact that the width of the upper and lower air defectors is fixed, so that the user comfortable experience is affected is solved, and the effect of improving the user comfortable experienceis improved.

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 discloses a natural wind / warm wind dual-purpose electric circulation fan. The fan includes a fan body shell (10), a pedestal assembly (70) for bearing the fan body shell, and a grillingor mesh front cover (60). The inside of the fan body shell successively includes a motor (20), a wind-guiding ring (30), a heat-generating body assembly (40) and a fan blade (50) from back to front ina coaxial line manner; the front part of the fan body shell is a wind channel (11), and the rear part, the bottom surface and the surface of the normal periphery of the central axis of the fan body shell are grilling or mesh wind intake structures; when the fan runs, the rear part of the wind blade can let wind in from the grilling or mesh fan body shell in radial and axial directions no matter the fan is used as the natural wind electric circulation fan or used as the warm wind electric circulation fan, so that enough wind amount can be guaranteed; and as the restriction effect of the wind channel, longer wind supply distance can be realized. The fan can choose the natural wind or the warm wind for use; and both working conditions can achieve the wind output and wind supply distance of natural wind electric circulation fans in the prior art, so that equipment use efficiency can be greatly enhanced, and large occupying space can be prevented from purchasing two pieces of equipment.

The invention discloses an air conditioner cabinet. The air conditioner cabinet comprises a surface frame support and an air guide plate assembly. An air outlet is formed in the surface frame support, and the air guide plate assembly is arranged at the air outlet; the air guide plate assembly comprises a plurality of air guide plates, and air holes are formed in the air guide plates. When the air guide plate assembly is in a first position state, the air guide plates cover the air outlet, and the air guide plates close to the surface frame support are in lap joint with the surface frame support so as to reduce air leakage gaps. According to the technical scheme, the air guide plates can close the air outlet to a large extent to prevent air from being blown out from the gaps between the air guide plates and the surface frame support, so that the air leakage gaps are reduced, and the wind-feeling-free air supply effect is guaranteed; on the other hand, the air leakage gaps are reduced, so that the wind pressure in an air duct is enhanced, then the air supply distance from the air conditioning cabinet is longer, the air conditioner cabinet is beneficial to rapid cooling in a room, and the temperature in the room is more balanced.

The invention provides a ceiling type air conditioner indoor unit. The ceiling type air conditioner indoor unit comprises a shell, a heat exchanger and a laminar flow fan, wherein the shell is provided with air inlets and air outlets; the heat exchanger is arranged in the shell; the laminar flow fan is arranged in the shell, and comprises a plurality of annular disks which are arranged in parallelat intervals and are fixedly connected with each other; when the plurality of annular disks are driven to rotate, air is sucked into a cavity on a radial inner side from one axial end, and then air boundary layers on the surfaces of the annular disks are driven by the annular disks to rotationally move from inside to outside along a radial direction due to the viscous effect to form laminar flowwind, in order that air is driven to flow through the heat exchanger from the air inlets, and then flow to the air outlets in order to return to a room; two guide plates which are arranged oppositelyand rotationally are arranged on each air outlet; each guide plate is provided with a plurality of ventilation micro-holes along a thickness direction; and two guide plates can rotate in a deviating way to positions where the air outlets are opened, so that a channel formed between the two guide plates is used for guiding the air outlet direction, or rotate toward to each other to positions wherethe air outlets are closed, so that air outlet current is blown through the plurality of ventilation micro-holes.

The invention provides a vortex ring generating device and an air regulating device. The vortex ring generating device comprises an air outlet cavity, a vortex ring generating part and a fan assembly,wherein the air outlet cavity is provided with an air inlet end and an air outlet end opposite to the air inlet end; an air-passing area of the air outlet end is smaller than that of the air inlet end; the vortex ring generating part is arranged at one side, away from the air outlet end, of the air inlet end; the vortex ring generating part can periodically drive air flow to blow out through theair outlet cavity; the fan assembly is arranged at one side, away from the air outlet cavity, of the vortex ring generating part, and can drive air flow to enter the vortex ring generating part. The vortex ring generating device provided by the invention can realize vortex ring air feeding, and expands the air feeding range and the air feeding distance.

The invention provides a method and device for controlling air return of an air conditioner, the air conditioner and a storage medium. The method comprises the steps that the air conditioner air return opening temperature and the indoor environment temperature are acquired; and according to the air conditioner air return opening temperature and the indoor environment temperature, whether the air conditioner operates in an air return short circuit preventing mode or not is determined. According to the method and device for controlling air return of the air conditioner, the air conditioner and the storage medium, in the use process of the air conditioner, the air conditioner air return opening temperature and the indoor environment temperature are acquired in real time, the current operationstate of the air conditioner can be acquired, and whether the air conditioner operates in the air return short circuit preventing mode or not is determined according to the air conditioner air returnopening temperature and the indoor environment temperature; and the air return short circuit phenomenon of the air conditioner, especially a ceiling unit can be effectively avoided, the operation effect and reliability of the air conditioner are guaranteed, and the use experience of a user is improved.

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 discloses a pipeline freezing rust scale layer structure sampling method, relating to a sampling method. The invention aims at solving the problems that the traditional rust scale device damages the original rust scale layer structure of the pipeline during sampling and the sampling quality can not be ensured. The pipeline freezing rust scale layer structure sampling method comprises the steps of: positioning a sampling point, to be specific, freely selecting a fire hydrant on a water supply pipeline with stable water supply as a sampling reference point; installing and positioning an auxiliary device, to be specific, installing an upstream valve, a downstream valve and a U-shaped rubber hose and processing two through holes; freezing, to be specific, freezing a water supply pipeline through an industrial air cooler; and sampling, to be specific, sampling the water supply pipeline reaching the freezing requirement through an electric saw. The pipeline freezing rust scale layer structure sampling method is simple in operation, and brings the convenience for experiment observation of the rust scale layer structure in the sampled pipeline. The pipeline freezing rust scale layer structure sampling method is used for sampling the water supply pipeline.