CN121048203B

CN121048203B - A four-pipe ventilation coil unit with bidirectional air supply, an air conditioner and its control method

Info

Publication number: CN121048203B
Application number: CN202511611240.XA
Authority: CN
Inventors: 董明珠; 卓明胜; 迟亚玲; 李慧慧; 邹家浩; 鄢学艳
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2025-11-05
Filing date: 2025-11-05
Publication date: 2026-01-20
Anticipated expiration: 2045-11-05
Also published as: CN121048203A

Abstract

The present disclosure relates to a four-duct fan tray apparatus for bi-directional air blowing, an air conditioner, and a control method. The device comprises a whole machine box body, a centrifugal fan capable of rotating a volute, a partition heat exchanger, an asymmetric wing-shaped guide plate, an air port assembly and a controller, wherein the centrifugal fan is assembled in the whole machine box body and comprises a fixed volute, a movable volute and a volute motor, the movable volute is rotatably arranged in the fixed volute, the volute motor is in transmission connection with the movable volute, the partition heat exchanger is arranged in the whole machine box body and corresponds to an airflow path of the centrifugal fan, the partition heat exchanger comprises an independent upper-layer heating heat exchanger and an independent lower-layer refrigerating heat exchanger, the asymmetric wing-shaped guide plate is arranged between the partition heat exchanger and the centrifugal fan, the air port assembly is arranged on the whole machine box body and used for achieving air inlet and outlet of indoor air, and the controller is respectively connected with the volute motor and the air port assembly in a signal mode and used for controlling switching of an air outlet direction of the centrifugal fan and opening and closing of the air port assembly in a linkage mode.

Description

Four-pipe wind disc device for bidirectional air supply, air conditioner and control method

Technical Field

The present disclosure relates to the field of air conditioners with bidirectional air supply four-pipe air-making disc devices, and in particular, to a bidirectional air supply four-pipe air-making disc device, an air conditioner, and a control method.

Background

The fan coil is used as core terminal equipment of a central air-conditioning water system, belongs to a hidden air-conditioning indoor unit, and is widely applied to scenes with strict requirements on temperature and humidity control precision and comfort, such as five-star hotels, hospitals, libraries and the like. In such a scene, different functional areas (such as rooms and corridors of hotels and diagnosis and treatment rooms and wards of hospitals) often have the parallel time overlapping condition of cold and heat requirements, and the indoor temperature stability requirement is extremely high, at the moment, the four-pipe wind making disc capable of realizing independent operation of refrigeration and heating becomes the only feasible technical scheme, and the irreplaceable advantage is that the different temperature adjustment requirements of different areas can be met simultaneously.

In order to solve the problems of sinking and direct blowing of cold air and insufficient heat exchange of floating of hot air caused by single air supply direction of the traditional fan coil, the prior art has a reversible air supply fan coil, and the reversible air supply structure still has obvious technical defects, namely, the prior four-pipe air supply fan coil falls into technical endless loop with high resistance, large noise, high energy consumption and poor comfort in a bidirectional air supply scene, and is difficult to meet the requirements of high-end scenes on comfort and energy conservation. Therefore, a technical solution capable of reconstructing airflow dynamics and optimizing heat exchange and air supply structure is needed to break through the bottleneck of the prior art, and promote the four-pipe wind disc to upgrade from expensive comfort sacrificial products to high-end products with cooperation of comfort and energy conservation.

Disclosure of Invention

The disclosure provides a four-pipe wind disc device with bidirectional air supply, an air conditioner and a control method, which are used for solving the technical problems that in the prior art, heating is insufficient, heat exchange is insufficient, the material cost of a heat exchanger is wasted, electric power is additionally increased, and comfortableness and energy conservation cannot be considered.

The four-pipe wind disc device capable of supplying air in two directions comprises a complete machine box body, a centrifugal fan capable of rotating a volute, a partition heat exchanger, an asymmetric wing type guide plate, an air port assembly and a controller, wherein the centrifugal fan is assembled in the complete machine box body and comprises a fixed volute, a movable volute and a volute motor, the movable volute is rotatably arranged in the fixed volute to adjust the air outlet direction, the volute motor is in transmission connection with the movable volute to drive the movable volute to rotate, the partition heat exchanger is arranged in the complete machine box body and corresponds to the airflow path of the centrifugal fan, the partition heat exchanger comprises an independent upper-layer heating heat exchanger and an independent lower-layer refrigerating heat exchanger to achieve heating and refrigerating functions respectively, the asymmetric wing type guide plate is arranged between the partition heat exchanger and the centrifugal fan and is used for guiding airflow between the partition heat exchanger and the centrifugal fan to adapt to the air supply requirement, the air port assembly is arranged on the complete machine box body and is used for achieving air inlet and outlet of indoor air, and the controller is respectively connected with the movable volute to control the air outlet assembly and the air outlet assembly to switch the air outlet direction.

Illustratively, the cooperation of the partition heat exchanger and the asymmetric airfoil deflector is combined to realize dynamic adaptation of bidirectional air supply.

The embodiment of the disclosure also provides an air conditioner, which comprises the four-pipe wind disc device for bidirectional air supply.

The embodiment of the disclosure further provides a control method applied to the air conditioner, which comprises the following steps:

When the air conditioner unit is in standby, the centrifugal fan, the air port assembly and the driving component of the asymmetric wing type guide plate are controlled to be powered off, so that the asymmetric wing type guide plate is kept in a closed state, the air port assembly is kept in a sealed state, and the movable volute is reset to the initial position of refrigeration and air supply;

When a refrigerating operation instruction is received, a refrigerating control flow is executed, namely, a corresponding refrigerating air port in the air port assembly is controlled to be opened, the movable volute is controlled to maintain the initial position of refrigerating air supply, the centrifugal fan is started to operate in a blowing mode, and meanwhile, the asymmetric wing-shaped guide plate is controlled to guide air flow to the lower refrigerating heat exchanger so as to realize refrigerating air supply;

When a heating operation instruction is received, a heating control flow is executed, namely, opening of a corresponding heating air port in the air port assembly is controlled, the volute motor is controlled to drive the movable volute to rotate to a heating air supply position, the centrifugal fan is started to operate in an induced draft mode, and meanwhile, the asymmetric wing-shaped guide plate is controlled to guide airflow to flow to the upper-layer heating heat exchanger so as to realize heating air supply;

When a shutdown instruction is received, the asymmetric wing-shaped guide plate and the air port assembly are controlled to be closed in a reset mode, the movable volute is controlled to be reset to the initial position of refrigerating and air supply, and the centrifugal fan is closed.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

In the two-way air supply four-pipe air making disc device, the air conditioner and the control method, the accurate switching of the refrigerating and heating modes is realized through the controller linked core component, specifically, when in the refrigerating mode, the controller controls the volute motor to keep the movable volute at the refrigerating and air supply position, the centrifugal fan operates in a blowing mode, indoor air enters the whole machine box through the air port component and is guided to the lower layer refrigerating heat exchanger for heat exchange through the asymmetric wing type guide plate, and cold air after heat exchange is sent out through the adaptive air port component; when the air conditioner is in a heating mode, the controller drives the volute motor to drive the movable volute to rotate to a heating air supply position, the centrifugal fan is switched to air suction type operation, indoor air enters through the other group of air port assemblies and flows through the upper layer heating heat exchanger to finish heat exchange under the guiding effect of the asymmetric wing type guide plate, hot air is discharged through the corresponding air port, and the independent design of the partition heat exchanger ensures that cold and hot heat exchange paths are not mutually interfered, so that stable circulation of air flows in different modes is ensured.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

FIG. 1 is a schematic diagram of a four-tube fan tray apparatus-refrigeration operation;

FIG. 2 is a schematic diagram of a four-tube fan tray apparatus-heating operation;

Fig. 3 is a schematic structural diagram of a four-pipe wind turbine device with bidirectional wind supply in a non-start state of a unit according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a four-pipe wind turbine device with bidirectional wind supply in a cooling mode according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a heating mode of a four-pipe wind turbine device with bidirectional wind supply according to an embodiment of the present disclosure.

Reference numerals illustrate:

1. The device comprises a box body, 12 parts of a bottom plate, 2 parts of a centrifugal fan, 21 parts of a fixed volute, 211 parts of an annular chute, 22 parts of a movable volute, 221 parts of a sliding block, 23 parts of a volute motor, 3 parts of a partition heat exchanger, 31 parts of an upper layer heating heat exchanger, 32 parts of a lower layer refrigerating heat exchanger, 33 parts of a separation plate, 4 parts of an asymmetric wing-shaped guide plate, 41 parts of an upper guide plate, 42 parts of a lower guide plate, 43 parts of a guide plate motor, 5 parts of a wind gap assembly, 51 parts of a lower wind gap assembly, 511 parts of a refrigerating return air filter net opening, 512 parts of a heating air supply and distributing opening, 52 parts of a side wind gap assembly, 521 parts of a heating return air filter net opening, 522 parts of a refrigerating air supply and distributing opening, 53 parts of a wind gap assembly control plate, 6 parts of a permanent magnet module, 7 parts of a return air temperature sensing bag, 71 parts of a first temperature sensing bag, 72 parts of a second temperature sensing bag, 8 parts of a water receiving disc.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are some, but not all, embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the disclosure, are within the scope of the disclosure.

According to the four-pipe wind disc device with bidirectional air supply, the partition heat exchanger 3 comprising the independent upper layer heating heat exchanger 31 and the independent lower layer refrigerating heat exchanger 32 is arranged in the whole machine box body 1, the resistance superposition problem of the integrated heat exchanger is avoided, the centrifugal fan 2 capable of adjusting the air outlet direction through the movable volute 22 is matched, the bidirectional air flow path is optimized by combining the asymmetric wing-shaped guide plate 4 arranged between the partition heat exchanger 3 and the centrifugal fan 2, and finally the air outlet direction of the centrifugal fan 2 is controlled to be switched and the air port assembly 5 is opened and closed by the controller in a linkage mode, so that stable circulation and accurate air supply of air flow in a refrigerating and heating mode are realized, the bottlenecks of high resistance, high noise, high energy consumption and poor comfort in the traditional scheme are overcome, and the air supply comfort and the operation energy conservation of the four-pipe wind disc are considered.

Referring to fig. 1-5, the bidirectional air supply four-pipe wind turbine device provided by the embodiment of the disclosure includes a whole machine box 1, a centrifugal fan 2 capable of rotating a volute, a partition heat exchanger 3, an asymmetric wing type guide plate 4, an air port component 5 and a controller, wherein the centrifugal fan 2 is assembled in the whole machine box 1, the centrifugal fan 2 includes a fixed volute 21, a movable volute 22 and a volute motor 23, the movable volute 22 is rotatably arranged in the fixed volute 21 to adjust an air outlet direction, the volute motor 23 is in transmission connection with the movable volute 22 to drive the movable volute 22 to rotate, the partition heat exchanger 3 is arranged in the whole machine box 1 and corresponds to an airflow path of the centrifugal fan 2, the partition heat exchanger 3 includes an independent upper layer heating heat exchanger 31 and a lower layer refrigerating heat exchanger 32 to realize heating and refrigerating functions respectively, the asymmetric wing type guide plate 4 is arranged between the partition heat exchanger 3 and the centrifugal fan 2 to guide airflow between the partition heat exchanger 3 and the centrifugal fan 2, the air port component 5 is arranged on the whole machine box 1 to realize air inlet and outlet direction adjustment of indoor air, the controller is respectively connected with the motor 23 and the movable volute 22 to realize signal switching of the wing type guide plate 2, and the air port component is matched with the air inlet component 5 is opened and closed to realize bidirectional air supply direction adjustment of the air flow.

The centrifugal fan 2 with rotatable scroll casing is exemplified, and it can be understood that the fixed scroll casing 21 is a basic casing of the centrifugal fan 2, the inner wall of the fixed scroll casing is preset to adapt to a rotating structure of the movable scroll casing 22, the movable scroll casing 22 is a rotatable arc casing, the movable scroll casing is sleeved inside the fixed scroll casing 21 and corresponds to a forward multi-wing centrifugal fan blade (mentioned in the following scheme), the scroll casing motor 23 is connected with the movable scroll casing 22 through a gear transmission mode and the like, when the air supply direction needs to be switched, the controller sends a signal to the scroll casing motor 23 to drive the movable scroll casing 22 to rotate around a central shaft of the fixed scroll casing 21, for example, in a refrigeration mode, the movable scroll casing 22 rotates to a position where an air outlet of the centrifugal fan 2 is opposite to a lower refrigeration heat exchanger 32 to ensure that air flow can flow to a refrigeration heat exchange area, and in a heating mode, the movable scroll casing 22 rotates clockwise to a position where the air outlet is opposite to the upper refrigeration heat exchanger 31 to realize accurate matching of the air supply direction and the heat exchange area, and the limitation of the single air supply direction of the traditional fixed scroll casing 21 is avoided.

The partition heat exchanger 3 may be understood as an independent upper layer heating heat exchanger 31 and a lower layer cooling heat exchanger 32, where the upper layer heating heat exchanger 31 and the lower layer cooling heat exchanger 32 are not communicated with each other, and the functions are clear, the upper layer heating heat exchanger 31 is only fed with hot water or heating medium in a heating mode, the lower layer cooling heat exchanger 32 is only fed with cold water or cooling medium in a cooling mode, and the two heat exchangers are arranged in an up-down layered manner in the whole case 1 through an isolation structure such as a hot galvanized plate, and are not integrally stacked by 3 rows of refrigeration+1 row of heating', and the upper layer heating heat exchanger 31 may be designed into a 2 row diagonal structure or a 3 row diagonal structure, when the upper layer heating heat exchanger 31 is in a 2 row diagonal structure, the lower layer cooling heat exchanger 32 may be in a 3 row diagonal structure, and when the upper layer heating heat exchanger 31 is in a 3 row diagonal structure, the lower layer cooling heat exchanger 32 may be in a 4 row diagonal structure, and the air flow only needs to flow through the corresponding single layer heat exchanger in the current mode after layering, thereby avoiding the problem of uniform heat exchange due to the heat exchange caused by the stacked heat exchange.

The flow guiding plate 4 is an asymmetric streamline structure, such as one side with large cambered surface curvature and the other side with small cambered surface curvature, and the radian design is suitable for the bidirectional airflow requirement, and is fixed in an airflow channel between the partition heat exchanger 3 and the centrifugal fan 2, and in an exemplary refrigeration mode, one side with larger curvature of the flow guiding plate faces the centrifugal fan 2 and the other side with smaller curvature faces the lower-layer refrigeration heat exchanger 32, so that airflow blown by the centrifugal fan 2 is uniformly covered on the surface of the lower-layer heat exchanger to avoid local accumulation or vortex of the airflow, and in an exemplary heating mode, the flow guiding plate guides indoor air to smoothly flow to the upper-layer heating heat exchanger 31 through the self asymmetric radian due to the fact that the centrifugal fan 2 is switched to be in an induced-draft mode, and simultaneously, the vortex formed by airflow backflow is blocked, so that smooth airflow circulation during bidirectional air supply is ensured.

The air port assembly 5 is not a single air port, but is composed of multiple groups of air ports adapting to two-way air supply, such as a lower air port assembly 51 arranged at the bottom of the box body 1 of the whole machine and a side air port assembly 52 arranged at the side, wherein each group of air ports comprises an air inlet functional component and an air outlet functional component, in an exemplary refrigeration mode, a controller controls a refrigerating return air filter screen port 511 in the lower air port assembly 51 to be opened for indoor air to enter the box, a refrigerating air supply and dissipation port 522 in the side air port assembly 52 to be opened for discharging cold air after heat exchange, in a heating mode, the controller switches air port states, enables a heating return air filter screen port 521 in the side air port assembly 52 to be opened, indoor air to enter, and heated air after heat exchange to be discharged, and two-way air inlet and outlet are realized through opening and closing of different air ports.

The dynamic adaptation in the dynamic adaptation of bidirectional air supply refers to the dynamic adaptation of the device to match the corresponding air supply mode by adjusting the states of core components in a linkage manner through a controller according to the cooling or heating requirements, for example, when the controller receives a cooling operation command, three actions are synchronously executed, namely, firstly, the volute motor 23 is controlled not to drive the movable volute 22 to maintain the initial position opposite to the lower-layer cooling heat exchanger 32, secondly, the air inlet assembly 5 is controlled to open the lower-layer air inlet and the side air outlet, thirdly, the asymmetric wing-shaped guide plate 4 is utilized to guide the air flow to the lower-layer cooling heat exchanger 32, when the controller is switched to a heating operation command, firstly, the volute motor 23 is driven to rotate to a position opposite to the upper-layer heating heat exchanger 31, secondly, the air inlet is switched to flow to the upper-layer heating heat exchanger 31 through the guide plate, and thirdly, manual intervention is not needed in the whole process, and automatic adaptation of the mode command, the component action and the air supply effect is realized.

In the heating mode, the controller drives the volute motor 23 to drive the movable volute 22 to rotate to the heating and air supplying position, the centrifugal fan 2 is switched to be in air suction type operation, indoor air enters through the upper layer heating heat exchanger 31 under the guiding action of the other group of air port assemblies 5 to complete heat exchange under the guiding action of the asymmetric wing type guide plates 4, hot air is discharged through the corresponding air port assemblies, the independent design of the partition heat exchanger 3 ensures that cold and hot heat exchange paths are not interfered with each other, and stable air flow in different modes is ensured.

It is pointed out that the partition heat exchanger 3 replaces the traditional 3+1 integrated 4-row tube structure, the asymmetric wing-shaped guide plate 4 is combined to optimize the air flow path, the internal resistance of the unit during bidirectional air supply is greatly reduced, the problems of increased resistance and higher energy consumption during heating of the traditional reversible air supply structure are fundamentally solved, meanwhile, the noise rise caused by air flow turbulence is avoided, further, the controller is relied on for controlling the air outlet direction of the centrifugal fan 2 and the air inlet assembly 5 in a linkage manner, the partition heat exchange design is matched, the air supply defects of sinking of cold air and floating of hot air are effectively overcome, the temperature stability and the air supply comfort are improved, in addition, the independent upper-layer heating heat exchanger 31 can fully meet the heating requirement without relying on an auxiliary electric heating device, the material cost waste is reduced, the electric power is reduced, and the comfort and energy-saving cooperative lifting is realized.

Considering the specific structural arrangement scheme of the partition heat exchanger 3, in the four-pipe wind disc device with bidirectional air supply provided in the embodiment of the present disclosure, the upper layer heating heat exchanger 31 and the lower layer refrigerating heat exchanger 32 both comprise inclined heat exchangers, and the layering height of the upper layer heating heat exchanger 31 is lower than that of the lower layer refrigerating heat exchanger 32.

Illustratively, the upper layer heating heat exchanger 31 and the lower layer cooling heat exchanger 32 have a height ratio of 1:2.

In the heating mode, the air flow only flows through the corresponding runner of the upper heating heat exchanger 31, and the inclined design can also guide the hot air flow to uniformly cover the upper heat exchange tube, so that the air flow is prevented from accumulating or mixing in the runner, and different air flow path requirements during bidirectional air supply are adapted.

Considering the specific structural arrangement scheme of the partition heat exchanger 3, in the bidirectional air supply four-pipe wind disc device provided in the embodiment of the disclosure, a separation plate 33 is arranged between the upper layer heating heat exchanger 31 and the lower layer refrigerating heat exchanger 32, and the separation plate 33 is respectively fixed with the lower end of the upper layer heating heat exchanger 31 and the top end of the lower layer refrigerating heat exchanger 32 so as to form independent heating flow channels and refrigerating flow channels.

The material, shape, and size of the partition plate 33 are not limited in the embodiment of the present disclosure as long as the composition requirement of the partition heat exchanger 3 of the present disclosure can be adapted.

Illustratively, the separator 33 is a hot galvanized plate, which is fixed to the lower end of the upper heating heat exchanger 31 and the upper end of the lower refrigerating heat exchanger 32, respectively, to form independent heating and refrigerating channels.

In this way, the hot dip galvanized sheet connects the lower end of the upper layer heating heat exchanger 31 and the top end of the lower layer refrigerating heat exchanger 32, and physically separates the heat exchange areas of the two to form independent heating channels and refrigerating channels which are not communicated with each other.

In addition, the upper and lower layered height ratio of 1:2 is designed with the inclined heat exchanger, the heat exchange area and the air flow contact efficiency are optimized for different heat exchange requirements of refrigeration and heating, the heating requirement can be met without depending on auxiliary electric heating, the material cost waste is avoided, the additional electric power is reduced, meanwhile, the structural stability of the layered heat exchanger is ensured due to the fixing effect of the hot galvanized plate, displacement caused by air flow impact in long-term operation is prevented, and the heat exchange stability and the equipment durability in bidirectional air supply are further ensured.

Considering the independent design schemes of the upper layer heating heat exchanger 31 and the lower layer refrigerating heat exchanger 32, in the four-pipe wind disc device with bidirectional air supply provided by the embodiment of the disclosure, the structural parameters of the inclined heat exchanger contained in the upper layer heating heat exchanger 31 are different from the structural parameters of the inclined heat exchanger contained in the lower layer refrigerating heat exchanger 32, and the structural parameters comprise the number of pipe rows, the number of copper pipes and the type of fins.

Illustratively, the upper layer heating heat exchanger 31 is a 2-row oblique heat exchanger, and the lower layer refrigerating heat exchanger 32 is a 3-row oblique heat exchanger.

The heat exchanger comprises a heat exchanger core heat exchange unit, wherein the heat exchanger core heat exchange unit comprises 2 groups or 3 groups of heat exchange tubes which are arranged in parallel, each group of heat exchange tubes extends along the same inclined direction to form independent heat exchange channels, and the heat exchanger core heat exchange unit is different from a traditional four-tube air disc 3-row refrigerating+1-row heating integrated stacked structure.

The upper layer heat exchanger 31 has an inclination angle of 45-50 degrees, the lower layer heat exchanger 32 has an inclination angle of 55-60 degrees, the heat exchange tube diameter of the upper layer heat exchanger 31 is 9.52mm, the fin spacing is 1.8mm, the heat exchange tube diameter of the lower layer heat exchanger 32 is 7.45mm, and the fin spacing is 2.0mm, so that the cooling tube diameter is less than or equal to the heating tube diameter, and the fins of the upper layer heat exchanger 31 and the lower layer heat exchanger 32 are hydrophilic aluminum foil fins.

The inclination angle refers to an included angle between the whole heat exchange tube and the bottom plate 12 of the whole machine box 1, the angle is based on airflow dynamics design, the upper layer heating heat exchanger 3145-50 degrees is inclined, the flow direction of air suction type air flow under a hot mode is adapted to be prepared, indoor air is guided to smoothly pass through the surface of the heat exchange tube, vortex is avoided when the air flow impacts the tube wall, the lower layer refrigerating heat exchanger 3255-60 degrees is inclined, the diffusion requirement of air blowing type air flow under a cold mode is adapted, the air flow blown out by the centrifugal fan 2 can uniformly cover 3 rows of heat exchange tubes, heat exchange dead angles caused by local accumulation of the air flow are reduced, and the two angles are different from the traditional horizontal or vertical arrangement, and the problem that air flow blocking is easy to occur is solved.

The difference between the pipe diameter and the fin spacing is set for the cold and hot heat exchange characteristics, specifically, the flow resistance of heating media such as hot water is smaller during heating, a scheme design with larger pipe diameter copper pipes and smaller pipe rows and fewer numbers of each row is adopted during heating, the heating capacity and the control water resistance are increased, the fin density can be increased by the 1.8mm narrow fin spacing, the heat transfer efficiency is improved, the cooling adopts a design with the pipe diameter of 7.45mm or 9.52mm or less, the cooling capacity and the control water resistance are increased by the design with the increased number of rows and the increased number of the numbers of the rows, the condensed water is prevented from accumulating among the fins by the fin spacing with the width of 2.0mm, the air flow is influenced by the condensed water, the hydrophilic aluminum foil fins are adopted for both, and the surface hydrophilic characteristic can enable the condensed water to quickly drop to the water receiving disc 8 instead of being adhered to the fin surface to block heat exchange, and the heat exchange stability of long-term operation is ensured.

In the refrigerating mode, indoor air flows enter the whole machine box body 1 and then directionally flow through the lower layer 3 row of inclined heat exchangers, the inclination angle is 55-60 degrees, the row number design is matched with the pipe diameter of the 7.45mm heat exchange pipes and the fin spacing of 2.0mm, the wider fin spacing provides sufficient channels for the air flows, meanwhile, the inclination angle of 55-60 degrees guides the air flows to evenly pass through each row of heat exchange pipes, condensed water is quickly discharged by combining hydrophilic aluminum foil fins to ensure that cold and hot air are efficiently transferred to the air flows, in the heating mode, the indoor air flows through the upper layer 2 row of inclined heat exchangers, the inclination angle is 45-50 degrees, the 2 row design is matched with the pipe diameter of 9.52mm heat exchange pipes and the fin spacing of 1.8mm, particularly, the fine pipe diameter reduces heat medium consumption, the fin spacing improves heat transfer efficiency, the inclination angle of 45-50 degrees enables induced draft air flows to smoothly pass through the heat exchange pipes, vortex generation is avoided, heat exchange is realized, the upper layer heat exchanger and lower layer heat exchanger independently operates, and the air flows only flow flows through the heat exchanger corresponding to the current mode, and the cold and hot runner mixing problem is avoided.

Furthermore, the partition row number design of the upper layer 2 row or the lower layer 3 row replaces the traditional 3+1 integrated heat exchanger, the resistance superposition caused by the air flow flowing through a plurality of rows of cold and hot pipes at the same time is avoided, the air flow vortex is reduced by combining a differential inclination angle, the running resistance of the whole machine is obviously reduced, the energy consumption is further reduced, the problems of high resistance and high energy consumption of the traditional reversible air supply structure are solved, the pipe diameter (9.52 mm or 7.45 mm) and the fin spacing (1.8 mm or 2.0 mm) which are optimized for the cold and hot heat exchange characteristics are optimized, the refrigeration and heating heat exchange efficiency is optimized, the auxiliary electric heating supplementary heat is not needed, the material cost is saved from the source, the electric heating part and the electric power are reduced, meanwhile, the heat exchange is prevented from being hindered by condensed water accumulation, the heat exchange stability of long-term running is guaranteed, the air supply comfort is further improved, and the bottleneck of insufficient heat exchange and high noise in the traditional scheme is broken through.

Considering the specific structural scheme of the asymmetric airfoil baffle 4, in the four-pipe wind turbine device with bidirectional air supply provided in the embodiment of the disclosure, the asymmetric airfoil baffle 4 includes an upper baffle 41 corresponding to the upper layer heating heat exchanger 31 and a lower baffle 42 corresponding to the lower layer cooling heat exchanger 32, and further includes a baffle motor 43, where the baffle motor 43 is respectively in transmission connection with the upper baffle 41 and the lower baffle 42 and is used for driving the upper baffle 41 and the lower baffle 42 to switch working positions, and the controller is in signal connection with the baffle motor 43 so as to control the action of the asymmetric airfoil baffle 4.

In the refrigeration mode, the controller sends a signal to the deflector motor 43 to drive the lower deflector 42 corresponding to the lower refrigeration heat exchanger 32 to switch to the working position, so that the wing-shaped structure of the lower deflector 42 is adapted to the blowing air flow of the centrifugal fan 2 to guide the air flow to smoothly flow to and uniformly cover the surface of the lower refrigeration heat exchanger 32 to ensure that the air flow is fully contacted with the heat exchange tubes, in the heating mode, the controller adjusts the deflector motor 43 to act to drive the upper deflector 41 corresponding to the upper heating heat exchanger 31 to switch to the working position, the wing-shaped structure of the upper deflector 41 is adapted to the air suction air flow of the centrifugal fan 2 to guide the indoor air to stably flow to the upper heating heat exchanger 31 to avoid vortex backflow of the air flow between the heat exchangers and the fans. In the whole process, the upper guide plate 42 and the lower guide plate 42 are independently switched by the guide plate motor 43 to respectively match the air flow paths of the refrigerating and heating modes, so that the accurate guide during bidirectional air supply is realized.

In summary, through the separate design of the upper guide plate 41 corresponding to heating and the lower guide plate 42 corresponding to cooling, the problem that the traditional single guide structure is difficult to adapt to bidirectional air flow is avoided by combining the driving control of the guide plate motor 43, the internal resistance of a unit generated by air flow disturbance is greatly reduced, the energy consumption of the whole unit is further reduced, the noise rise caused by vortex is avoided, the requirement of high-end scenes on silence is met, in addition, the upper guide plate 41 and the lower guide plate 42 respectively guide the air flow to the corresponding heat exchangers, the distribution uniformity of the air flow on the surfaces of the heat exchangers is effectively improved, the problem of low heat exchange efficiency caused by partial accumulation or insufficient contact of the traditional air flow is avoided, the heating effect can be ensured without relying on auxiliary electric heating, the material cost is saved, the electric power is reduced, and the synergistic effects of flow guiding optimization, resistance reduction and efficiency improvement are realized.

Considering the rotation adaptive scheme of the centrifugal fan 2 with rotatable volute, in the four-pipe wind disc device with bidirectional air supply provided in the embodiment of the disclosure, the inner wall of the fixed volute 21 is provided with the annular chute 211, the outer wall of the movable volute 22 is provided with the sliding block 221 which is in sliding fit with the annular chute 211, and the movable volute 22 realizes rotation through the matching of the sliding block 221 and the annular chute 211.

The annular chute 211 is a groove structure formed on the inner wall of the fixed scroll 21 along the circumferential direction, and has a U-shaped or slot-shaped cross section, and the chute is smooth and free of any jamming.

The sliding blocks 221 are integrally formed or fixedly connected protruding blocks on the outer wall of the movable scroll 22, the number of the protruding blocks is generally 2-4, the protruding blocks are uniformly distributed along the circumference of the movable scroll 22, the shape and the size of the sliding blocks 221 are completely matched with those of the annular sliding grooves 211, and the sliding blocks can smoothly slide in the circumferential direction in the grooves.

Like this, the cooperation between annular spout 211 and slider 221 is equivalent to providing circumference guide track for movable scroll case 22, when the air supply direction is switched to needs, movable scroll case 22 need not whole dismantlement or skew, only can realize 360 within range's accurate rotations through the slip of slider 221 along annular spout 211, ensure movable scroll case 22 and fixed spiral case 21 coaxial all the time, avoid appearing air current leakage or jamming in the rotation process, the switching demand to the air-out direction when adaptation is two-way to send wind, aim at lower floor's refrigeration heat exchanger 32 when cooling for example, aim at upper strata heats heat exchanger 31 when heating.

The forward direction refers to the blade outlet angle of the blade being smaller than 90 degrees, the blade outlet angle being the angle between the blade end and the tangential direction of rotation of the blade, and the blade outlet angle being 30-45 degrees.

The number of the blades of the multi-wing finger fan blade is large, typically 12-16 blades, and the blades are of a thin arc-shaped structure. The fan blade is characterized in that the fan blade is adapted to the air flow requirement of bidirectional air supply, when the fan blade rotates to generate blowing air flow in a refrigerating mode, the forward blade can efficiently convert mechanical energy into air flow energy to ensure that the air flow is stably blown to a refrigerating heat exchanger below, when the fan blade is switched to air suction type operation in a heating mode, the air inlet area can be increased by a multi-wing structure, the air suction resistance of the air flow is reduced, meanwhile, the vortex of the air flow on the surface of the fan blade can be reduced by the arc-shaped design of the forward blade, the stable air quantity and air pressure can be output in both air supply modes, and the fan blade is different from the problem that the conventional single-wing or backward blade is difficult to consider the bidirectional air supply stability.

In the refrigeration mode, the movable scroll 22 is driven by external force to rotate smoothly along the annular chute 211 to drive the movable scroll 22 to turn and face the upper layer heating heat exchanger 31, the forward multi-wing centrifugal fan blades are synchronously switched to air suction type rotation, the indoor air is sucked by utilizing the large air suction advantage of the multi-wing structure, and the air is discharged through the lower air inlet after heat exchange of the upper layer heating heat exchanger 31. In the whole process, the coaxiality and smoothness of the movable scroll 22 during rotation are ensured by the cooperation of the annular sliding groove 211 and the sliding block 221, the air flow stability of the forward multi-wing centrifugal fan blade in two air supply modes is ensured, and the differential air flow path requirements of cold and hot heat exchange are jointly adapted.

In conclusion, the sliding fit structure of the annular sliding groove 211 and the sliding block 221 avoids the problems of air leakage or clamping stagnation caused by inaccurate positioning when the traditional volute rotates, so that the resistance is smaller and the action is more accurate when the movable volute 22 switches the air outlet direction, the air flow resistance in a unit during bidirectional air supply is greatly reduced, the resistance can be reduced by 18% during heating through verification, the whole energy consumption is further reduced, in addition, the design of the forward multi-wing centrifugal fan blade is suitable for preparing air flow kinetic energy required by a cold air blowing mode, the low-resistance air inlet characteristic required by a heating air suction mode is also met, the problem of air volume fluctuation or noise rise easily occurring by the traditional fan blade in the bidirectional air supply mode is avoided, the noise can be reduced by at least 2 db through verification, meanwhile, the accurate air outlet direction is switched and stable air flow output, the high-efficient coverage of the corresponding heat exchanger respectively by cold and hot air flows can be ensured, the cooperative effects of material cost and power consumption are saved from the source, the electric power consumption is not required, and the air supply direction adaptation, the air flow resistance is reduced, and the energy consumption noise is optimized are realized.

Considering the adsorption fixing scheme of the asymmetric airfoil deflector 4, in the four-pipe wind disc device for bidirectional air supply provided by the embodiment of the disclosure, the device further comprises a permanent magnet module 6, wherein the permanent magnet module 6 is arranged on the isolation plate 33 and the bottom plate 12 of the whole machine box 1, and is used for adsorbing and fixing the asymmetric airfoil deflector 4 when the driving component of the asymmetric airfoil deflector 4 is not electrified. It should be noted that the permanent magnet modules 6 include two permanent magnet modules 6, one of which is disposed at the position of the partition plate 33 on the whole machine box 1, in a space on the partition plate 33 facing the side of the lower refrigeration heat exchanger 32, the permanent magnet module 6 is used for matching with the lower deflector 42, and the other one of which is disposed at the position of the upper bottom plate 12 of the whole machine box 1, in a space on the side of the bottom plate 12 on the top of the space where the upper heating heat exchanger 31 is located, and the permanent magnet module 6 is used for matching with the upper deflector 41.

Specifically, in the cooling or heating mode, when the driving component of the asymmetric airfoil-shaped deflector 4 is adapted to the position adjustment requirement of the deflector, and the power is turned off after the target position adjustment of the upper deflector 41 or the lower deflector 42 is completed, the permanent magnet module 6 arranged on the isolation plate 33 or the bottom plate 12 of the whole machine box 1 can fix the deflector at the corresponding position through the magnetic adsorption, for example, the lower deflector 42 positioned at the isolation plate 33 in the cooling mode is fixed, and the upper deflector 41 at the adapting position is fixed in the heating mode, so that the deflector can still maintain a stable guiding posture when no driving power is input.

Therefore, the problems of turbulence of the air flow path and increase of the internal resistance of the unit caused by the displacement of the guide plate due to the power failure of the driving part are avoided, the driving part is not required to be continuously electrified to maintain the position of the guide plate, the extra energy consumption is reduced, meanwhile, the stable guide posture can ensure that the air flow uniformly flows through the upper-layer heating heat exchanger 31 or the lower-layer refrigerating heat exchanger 32, the heat exchange efficiency is improved, the noise generated by the turbulence of the air flow is reduced, the heating requirement can be met without depending on auxiliary electric heating, and the material cost and the electric power are further saved.

Considering the specific scheme of the refrigeration mode, in the four-pipe wind disc device with bidirectional air supply provided by the embodiment of the disclosure, the centrifugal fan 2 further comprises a forward multi-wing centrifugal fan blade;

when the controller starts the refrigeration mode, at the initial position of refrigeration air supply, the forward multi-wing centrifugal fan blade starts and operates in a blowing mode to generate airflow power from the centrifugal fan 2 to the partition heat exchanger 3, the blowing airflow of the forward multi-wing centrifugal fan blade faces the lower guide plate 42, the upward buoyancy of the airflow generated by the forward multi-wing centrifugal fan blade and the adsorption force of the permanent magnet module 6 jointly limit the position of the lower guide plate 42, and the forward multi-wing centrifugal fan blade is used for driving the airflow to the lower refrigeration heat exchanger 32 to exchange heat.

In consideration of the specific scheme of the heating mode, in the four-pipe air-making disc device with bidirectional air supply provided in the embodiment of the disclosure, based on the foregoing scheme, when the controller starts the heating mode, the forward multi-wing centrifugal fan blade starts and operates in an induced draft mode at the heating air supply position for generating airflow power from the partition heat exchanger 3 to the centrifugal fan 2, the position of the upper guide plate 41 is defined by the airflow down force generated by the forward multi-wing centrifugal fan blade and the gravity of the upper guide plate 41, and the forward multi-wing centrifugal fan blade is used for sucking indoor air through the heating return air filter inlet 521 of the side air inlet assembly 52, guiding the airflow to exchange heat through the upper layer heating heat exchanger 31, and sending the hot air after heat exchange through the heating air supply and dissipation inlet 512 of the air outlet assembly 51.

Considering the specific structural scheme of the air port assembly 5, in the four-pipe air disk device with bidirectional air supply provided in the embodiment of the disclosure, the air port assembly 5 comprises a lower air port assembly 51 arranged at the bottom of the whole machine box 1 and a side air port assembly 52 arranged at the side surface of the whole machine box 1, and further comprises an air port assembly control board 53, wherein the air port assembly control board 53 is electrically connected with the lower air port assembly 51 and the side air port assembly 52 respectively, and the controller controls the opening and closing of the lower air port assembly 51 and the side air port assembly 52 through the air port assembly control board 53.

Wherein, the lower tuyere assembly 51 comprises a refrigerating return air filter net opening 511 and a heating air supply and dissipation opening 512, the side tuyere assembly 52 comprises a heating return air filter net opening 521 and a refrigerating air supply and dissipation opening 522, and the controller respectively controls the opening and closing of the refrigerating return air filter net opening 511, the heating air supply and dissipation opening 512, the heating return air filter net opening 521 and the refrigerating air supply and dissipation opening 522 through the tuyere assembly control board 53.

Specifically, the controller controls the opening and closing of the lower air port assembly 51 (comprising a refrigerating air return filter screen port 511 and a heating air supply and dissipation port 512) arranged at the bottom of the box body 1 and the side air port assembly 52 (comprising a heating air return filter screen port 521 and a refrigerating air supply and dissipation port 522) arranged at the side in a linkage manner through an air port assembly control board 53 according to refrigerating or heating operation requirements, specifically, in a refrigerating mode, the refrigerating air return filter screen port 511 of the lower air port assembly 51 is opened to introduce indoor air, the refrigerating air supply and dissipation port 522 of the side air port assembly 52 is opened to discharge cold air after heat exchange, in a heating mode, the heating air return filter screen port 521 of the side air port assembly 52 is opened to introduce indoor air, and the heating air supply and dissipation port 512 of the lower air port assembly 51 is opened to discharge hot air after heat exchange, so that accurate matching of an air inlet and outlet paths in a bidirectional air supply is realized.

Like this, through the pertinence of minute function wind gap open and close and position overall arrangement, the air current mixed flow that easily appears when having avoided traditional single wind gap adaptation two-way air feed, cold and hot wind carries dislocation problem, effectively solve cold air and sink and directly blow, the insufficient drawback of hot air come-up heat transfer, promote the air feed travelling comfort, accurate wind gap control reduces the resistance waste that the invalid circulation of air current leads to simultaneously, cooperation subregion heat exchanger 3 need not to rely on auxiliary electric heating, both material cost is practiced thrift, reduce the energy consumption of whole again, realize comfortable and energy-conserving collaborative optimization.

Considering the scheme of return air temperature detection, in the four-pipe wind disc device of two-way air supply provided by the embodiment of the disclosure, the device further comprises a return air temperature sensing bulb 7, the return air temperature sensing bulb 7 comprises a first temperature sensing bulb 71 corresponding to the lower air port assembly 51 and a second temperature sensing bulb 72 corresponding to the side air port assembly 52, and the first temperature sensing bulb 71 and the second temperature sensing bulb 72 are respectively connected with a controller through signals and are used for respectively detecting return air temperatures under refrigeration and heating modes.

The return air temperature sensing bag 7 includes a first temperature sensing bag 71 corresponding to the air inlet assembly 51 and a second temperature sensing bag 72 corresponding to the side air inlet assembly 52, wherein the corresponding arrangement means that the first temperature sensing bag 71 is physically installed in a return air channel of the air inlet assembly 51, such as near a refrigerating return air filter inlet 511, and only contacts indoor return air entering the case in the refrigerating mode, and the second temperature sensing bag 72 is installed in a return air channel of the side air inlet assembly 52, such as near a heating return air filter inlet 521, and only contacts indoor return air entering the case in the heating mode.

The air return paths of the two modes are different, so that indoor air is returned from the lower air port assembly 51 in refrigeration and is returned from the side air port assembly 52 in heating, real return air temperature in the current mode can be accurately captured by separately arranging the temperature sensing bags, detection deviation caused by mode switching of the single temperature sensing bag is avoided, temperature signals are transmitted to the controller in real time, accurate basis is provided for subsequent temperature regulation (such as closing a water valve), and core requirements of independent operation of cooling and heating of four-pipe air dishes are adapted.

Considering the specific scheme of the device, in the four-pipe wind tray device with bidirectional air supply provided by the embodiment of the disclosure, the four-pipe wind tray device further comprises a water tray 8, wherein the water tray 8 is arranged at the bottom of the whole machine box 1 and corresponds to the lower-layer refrigeration heat exchanger 32.

The water pan 8 is disposed at the bottom of the whole machine box 1 and corresponds to the lower-layer refrigeration heat exchanger 32, and the horizontal projection range of the water pan 8 is correspondingly disposed to completely cover the lower area of the lower-layer refrigeration heat exchanger 32, and the position of the water pan is matched with the inclination angle of the lower-layer refrigeration heat exchanger 32, so that condensed water generated on the surface of the lower-layer refrigeration heat exchanger 32 in a refrigeration mode can naturally drip along the surface of an obliquely arranged heat exchange tube, and can directly fall into the lower-layer water pan 8, thereby avoiding the condensed water from flowing to other components in the machine box, such as the centrifugal fan 2 and the controller, to cause equipment corrosion or short circuit. The water pan 8 does not need to cover the upper heating heat exchanger 31, no condensed water is generated during heating, the structure is simplified, the space is saved, and the characteristic of partition heat exchange is adapted.

Specifically, in the refrigeration mode, the indoor return air enters the case from the air inlet assembly 51, the corresponding first temperature sensing bag 71 detects the return air temperature in real time and transmits signals to the controller, when the controller judges that the return air temperature is lower than the set temperature-delta T (delta T is a reasonable temperature difference and the adaptive temperature stabilizing requirement can be 1-3 ℃), the water valve is immediately controlled to be closed so as to stop refrigeration, and excessive energy consumption caused by cooling is avoided.

The separated return air temperature sensing bags 7 realize accurate temperature detection and self-adaptive adjustment in refrigeration and heating modes, avoid energy consumption waste caused by inaccurate detection of a traditional single temperature sensing bag, collect refrigeration condensed water in a targeted manner, ensure long-term stable operation of equipment, meet heating requirements without relying on auxiliary electric heating by combining partition heat exchange design, save material cost, further reduce whole energy consumption through accurate temperature control, ensure indoor temperature stability, and meet requirements of high-end scenes on comfort, energy conservation and reliability.

The embodiment of the disclosure also provides an air conditioner, which includes the four-pipe wind disc device with bidirectional air supply, and can realize all technical effects of the four-pipe wind disc device with bidirectional air supply, which is not described herein.

The embodiment of the disclosure also provides a control method applied to the air conditioner, the method comprising:

When the air conditioner unit is in standby, the centrifugal fan 2, the air port assembly 5 and the driving components of the asymmetric wing type guide plate 4 are controlled to be powered off, so that the asymmetric wing type guide plate 4 is kept in a closed state, the air port assembly 5 is kept in a sealed state, and the movable volute 22 is reset to the initial position of refrigeration and air supply;

when receiving a refrigerating operation instruction, executing a refrigerating control flow, namely controlling an air port corresponding to refrigeration in the air port assembly 5 to be opened, controlling the movable volute 22 to maintain the initial position of refrigerating air supply, starting the centrifugal fan 2 to perform blowing operation, and simultaneously controlling the asymmetric wing-shaped guide plate 4 to guide air flow to the lower refrigerating heat exchanger 32 so as to realize refrigerating air supply;

When a heating operation instruction is received, a heating control flow is executed, namely, opening of a corresponding heating air port in the air port assembly 5 is controlled, a volute motor 23 is controlled to drive a movable volute 22 to rotate to a heating air supply position, a centrifugal fan 2 is started to operate in an induced draft mode, and meanwhile, an asymmetric wing type guide plate 4 is controlled to guide airflow to flow to an upper-layer heating heat exchanger 31 so as to realize heating air supply;

when a shutdown instruction is received, the asymmetric wing-shaped guide plate 4 and the air port assembly 5 are controlled to be reset and closed, the movable volute 22 is controlled to be reset to the initial position of refrigeration and air supply, and the centrifugal fan 2 is closed.

In the standby stage of the unit, all core components are powered off, the asymmetric wing-shaped guide plate 4 is kept closed by structural limitation or permanent magnet adsorption, the air port assembly 5 is sealed, the movable volute 22 is reset to the initial position aligned with the lower-layer refrigerating heat exchanger 32, after a refrigerating instruction is received, the controller is linked to open an air port corresponding to refrigerating, such as air return of the air port and air outlet of the side air port, the initial position of the movable volute 22 is kept, the centrifugal fan 2 is started to operate in a blowing mode, meanwhile, the asymmetric wing-shaped guide plate 4 is controlled to guide air flow to the lower-layer refrigerating heat exchanger 32 to finish refrigerating and air supply, after a heating instruction is received, the controller is switched to open the air port corresponding to heating, such as air return of the side air port and air outlet of the lower air port, the movable volute 22 is driven to rotate to the position aligned with the upper-layer heating heat exchanger 31, the centrifugal fan 2 is started to operate in an induced draft mode, the asymmetric wing-shaped guide plate 4 is synchronously controlled to guide air flow to the upper-layer heating heat exchanger 31 to realize heating and air supply, and when a shutdown instruction is received, all components are reset, the guide plate is closed, the air port is sealed, the movable volute 22 returns to the initial position, and the fan is closed.

The air-blowing or induced-draught type operation, the directional guide of the guide plate and the adaptation of the partition heat exchanger 3 greatly reduce the air flow resistance in the unit, reduce the energy consumption, and solve the comfort problems of sinking cold air and floating hot air by precisely matching the differential opening and closing of the air gap with the modes, thereby avoiding the inefficiency and error of the traditional manual adjustment.

When receiving the refrigeration operation instruction, in the step of executing the refrigeration control flow, the lower deflector 42 of the asymmetric airfoil deflector 4 is controlled to rotate to a positioning position and fixed, the driving part is closed after maintaining the state for a preset time, the return air temperature is detected by the first temperature sensing bulb 71, and if the return air temperature is smaller than the difference between the set temperature and DeltaT, the water valve is closed and the current state of the centrifugal fan 2 and the air port assembly 5 is maintained. Specifically, when the four-pipe wind turbine device with bidirectional air supply receives a refrigeration operation instruction and executes a refrigeration control flow, the controller firstly controls the lower guide plate 42 of the asymmetric wing type guide plate 4 to rotate to a positioning position and fix, after maintaining the positioning state for a preset time, the driving part of the lower guide plate 42 is closed to stop driving, meanwhile, the first temperature sensing bulb 71 corresponding to the lower air port assembly 51 detects the return air temperature in real time, if the return air temperature detected by the first temperature sensing bulb 71 is lower than the difference value between the set temperature and DeltaT, the controller controls the water valve to be closed, and the current running state of the centrifugal fan 2 and the current opening and closing state of the air port corresponding to refrigeration in the air port assembly 5 are maintained, so that the refrigeration process is ensured to be regulated and controlled as required.

In this way, the lower guide plate 42 can accurately guide the airflow to flow to the lower-layer refrigeration heat exchanger 32 after being positioned and fixed, the problems of resistance increase and noise caused by airflow turbulence are avoided, the driving part is closed timely, the additional energy consumption can be reduced, the first temperature sensing bulb 71 can accurately detect the return air temperature and control the linkage of the water valve, the energy consumption waste caused by excessive refrigeration can be prevented, the indoor temperature stability can be ensured when the state of the fan and the air port is maintained, the independent refrigeration function of the partitioned heat exchanger 3 is matched, the auxiliary electric heating is not needed, the material cost and the electric power are further saved, and the cooperative promotion of energy conservation, silence and temperature stability in the refrigeration mode is realized.

When receiving the heating operation command, the step of executing the heating control flow controls the upper baffle 41 of the asymmetric airfoil baffle 4 to rotate to the positioning position and fix, maintains the state for a preset time, then closes the driving part, detects the return air temperature through the second temperature sensing bulb 72, and if the return air temperature is greater than the sum of the set temperature and DeltaT, closes the water valve and maintains the current state of the centrifugal fan 2 and the tuyere assembly 5.

Specifically, when the four-pipe wind plate device with bidirectional air supply receives a heating operation instruction and executes a heating control flow, the controller firstly controls the upper guide plate 41 of the asymmetric wing type guide plate 4 to rotate to a positioning position which is matched with the airflow path of the upper heating heat exchanger 31 and fix the upper guide plate, after the positioning state is maintained for a preset time to ensure stable guide posture, the driving part of the upper guide plate 41 is closed, meanwhile, the second temperature sensing bag 72 corresponding to the side air port assembly 52 continuously detects the return air temperature in the heating mode, if the return air temperature detected by the second temperature sensing bag 72 is greater than the set temperature plus delta T, the controller immediately controls the water valve to be closed, and the current induced draft running state of the centrifugal fan 2 and the current opening and closing state of the corresponding heated air port in the air port assembly 5 are maintained, so that the heating process is started and stopped as required.

Therefore, after the upper guide plate 41 is positioned and fixed, the air flow can be guided to flow forward to the upper heating heat exchanger 31 accurately, the resistance increase and noise rise caused by vortex formed by air flow backflow are avoided, the driving part is closed timely, the additional electric energy consumption can be reduced, the second temperature sensing bulb 72 can detect the return air temperature accurately and control the water valve in a linkage manner, the energy consumption waste caused by excessive heating can be prevented, the temperature fluctuation can be avoided when the state of the fan and the air port is maintained, the independent heating function of the partitioned heat exchanger 3 is matched, the auxiliary electric heating is not needed, the material cost is saved, the electric power consumption of the whole machine is reduced, and the cooperative optimization of the air supply comfort, the operation energy conservation and the temperature stability in the heating mode is realized.

In order to better understand the schemes of the bidirectional air supply four-pipe air-making disc device, the air conditioner and the control method provided by the embodiment of the disclosure, the following description is made in connection with the following floor embodiment example:

The present disclosure, through the reconstruction of zoned aerodynamic, allows four-duct dampers to evolve from expensive comfort sacrifices to comfortable and energy efficient high-end products. The air flow path foundation is provided through the partition structure, the path optimization is realized through the radian of the asymmetric wing-shaped guide plate 4, the dynamic adaptation is completed through the bidirectional air supply technology, the air flow path foundation, the asymmetric wing-shaped guide plate 4 and the bidirectional air supply technology are inexhaustible and mutually energized, the dead circulation with high resistance, high noise and poor comfort in the traditional scheme is thoroughly solved, the heating heat exchanger and the refrigerating heat exchanger can be independently designed, and compared with the integrated 4-row four-tube heating heat exchanger, the scheme that the structural size of the heat exchanger is designed more specifically to achieve the optimal refrigerating and heating effects can be achieved, the material cost is saved from the source, the heat exchange capacity is provided, the electric heating auxiliary equipment is avoided, and the electric power is reduced.

The reversible air supply fan coil unit can solve the problems that the conventional indoor unit is in a single air supply direction, direct cold air sinking blowing or insufficient hot air floating heat exchange is easy to occur, the air chance is changed from blowing mode to induced draft mode after the bidirectional air supply fan mode of the reversible air supply fan coil unit is switched, the internal resistance of the unit is obviously increased, the defect that the conventional four-tube heat exchanger scheme is in great resistance is overcome on the secondary basis, the bottleneck problem that the resistance or energy consumption of the bidirectional air supply four-tube heat exchanger is great is solved by the design of the upper and lower partition four-tube heat exchanger, the upgrade scheme is designed, the system is more energy-saving, the asymmetric wing-shaped guide plate 4 is further additionally arranged on the basis of the mode switching of the bidirectional air supply fan, the radian of the asymmetric wing-shaped guide plate is optimized, the smoothness uniformity of the air channel in the unit and the wind speed distribution of the surface of the heat exchanger are improved, and the high-end requirements of high noise and discomfort and calm are solved.

The embodiment of the disclosure provides a partition structure, a guide plate and a dynamic adapting bidirectional air supply four-pipe wind disc structure and control, partition airflow of the four-pipe wind disc structure is mainly realized by arranging the drainage direction of an asymmetric wing type guide plate 4 between a heat exchanger and a centrifugal fan 2, and then changing the traditional 4-row integrated structure into an upper layer 2 row, a lower layer 3 row partition structure design and a bidirectional air supply technology by combining the heat exchanger. The partition structure comprises 2 rows of inclined heat exchangers which are converted from a traditional four-pipe single-row heating part, and 3 rows of inclined heat exchangers which are converted from a traditional four-pipe 3-row refrigerating part. The upper layer is a heating heat exchanger runner, the lower layer is a refrigerating heat exchanger runner, the height ratio of the upper layer to the lower layer is 1:2, and the upper layer heat exchanger lower end and the lower layer heat exchanger top end are fixed by the hot galvanizing plate isolation between the partitions. The bidirectional air supply technology mainly comprises a volute and a forward multi-wing centrifugal fan blade through the direction-variable air outlet centrifugal fan 2, wherein the volute consists of a fixed volute 21 and a movable volute 22, and the movable volute 22 can rotate in the fixed volute 21 to realize shielding and opening of different air outlets on the fixed volute 21, so that the air outlet direction of the centrifugal fan 2 is adjusted. The four-tube heat exchanger has the advantages that the effect that the resistance of the four-tube heat exchanger is reduced in different modes when the two-way air supply in different modes is integrally realized, and the comfort and the energy saving of the four-tube two-way air supply system are realized. The partition type guide plate dynamic adapting bidirectional air supply operation control is distinguished according to the unit operation mode, and then the air port assembly 5 of the unit is controlled in a linkage mode, so that the control of the independent refrigerating area and the independent heating area is realized.

Specifically, the partition type bidirectional air supply four-pipe wind making disc provided by the embodiment of the disclosure comprises a whole machine box body 1, a centrifugal fan 2 capable of rotating a volute, a volute motor 23, a refrigeration heat exchanger, a heating heat exchanger, an asymmetric wing type guide plate 4, a guide plate motor 43, a permanent magnet, a water receiving disc 8, a lower air port assembly 51, a side air port assembly 52 and a controller component. The partition airflow is mainly used for guiding the direction by arranging an asymmetric wing-shaped guide plate 4 between the heat exchanger and the centrifugal fan 2, and is changed into a partition structure design of an upper layer 2 row and a lower layer 3 row by combining the heat exchanger through a traditional 4-row integrated structure, wherein the partition structure comprises 2 rows of inclined heat exchangers which are converted from traditional four-tube single-row heating parts, and 3 rows of inclined heat exchangers which are converted from traditional four-tube 3-row refrigerating parts. The upper and lower partitions are isolated by a hot galvanizing plate and used for fixing the lower end of the upper heat exchanger and the top end of the lower heat exchanger. The upper layer is a heating heat exchanger runner, the lower layer is a refrigerating heat exchanger runner, and the height ratio of the upper layer to the lower layer is 1:2. The inclination angle of the upper layer heat exchanger is designed to be in the range of 45-50 degrees, and the inclination angle of the lower layer heat exchanger is designed to be in the range of 55-60 degrees. The refrigerating heat exchanger and the heating heat exchanger can be independently designed and selected according to optimal performance and wind resistance control, and structural parameters such as different pipe diameters, fin types, sheet distances and the like are selected, so that the height ratio of the upper layer to the lower layer of the partition structure is 1:2, and the wind resistance ratio is 1:1.5. The heating air quantity of the partition design can be reduced by 10% compared with the original scheme, and the noise is reduced by at least 2 db. The heat resistance is reduced by 18%, and the refrigerating resistance is reduced by 25%. Reference is made to the comparison of the results of the calculations in the table below.

The asymmetric airfoil-shaped guide plates 4 are divided into an upper guide plate 41 and a lower guide plate 42, wherein the upper guide plate 41 is used for guiding the hot gas processed by the heating heat exchanger into the fan blades of the centrifugal fan 2. The lower deflector 42 is used for guiding indoor return air blown out from the air outlet of the centrifugal fan 2 to the refrigeration heat exchanger so that the return air uniformly flows to the surface of the heat exchanger to perform sufficient heat exchange. And a permanent magnet module 6 is arranged at the position of the isolation plate 33 and used for fixing the lower guide plate 42 to keep a fixed state when the motor is not electrified and is not driven. The baffle switch action is driven by the motor module.

Regarding the control of the running process:

When the air conditioner unit is not started, the air port assembly control plate 53, the guide plate motor 43 and the fan motor are not electrified, the guide plate is in a closed state, the air port assembly 5 is in a sealed state synchronously, and the bidirectional air supply volute defaults to a refrigerating air supply state.

When the refrigerating operation is performed, the control panel of the lower air inlet assembly 51 is started, the refrigerating return air filter screen port 511 is controlled to be opened, the bidirectional air supply fan is started, the fan volute default initial state is that the air outlet is turned into the unit box body, the air blowing type refrigerating is performed, the side air inlet assembly 52 is opened, the refrigerating air supply and distributing port 522 is opened, the motor of the lower guide plate 42 is started, the guide plate 42 is controlled to be separated from the buckling position of the bottom plate 12 and turned to the permanent magnet of the isolation plate 33, and after the state of the refrigerating mode 60S is identified and maintained, the guide plate motor 43 is automatically closed, and the guide plate strongly attracts and fixes the guide effect by means of buoyancy on the air outlet and the permanent magnet. The unit judges that the refrigerating operation mode is continuously carried out through the return air temperature sensing bag 7 of the lower return air port. When the return air temperature is less than the set temperature-DeltaT, the water valve is closed, the fan maintains the current running state, and the lower air port assembly 51 and the side return air assembly synchronously maintain the current state. When the cooling mode is exited and the air conditioner is turned off, the deflector motor 43 is electrified and synchronously acts with the air port assembly 5 to control the deflector to restore to the original closed position.

When the heating operation is performed, the control panel of the side air port assembly 52 is started, the heating return air filter screen 521 is controlled to be opened, the bidirectional air supply fan is started, the fan volute is rotated clockwise from an initial state to an air outlet position where the air outlet of the fan is opposite to the air outlet assembly 51, induced draft type heating is performed, the air outlet assembly 51 is opened to heat the air supply and dissipation port 512, the upper guide plate 41 is started, the upper guide plate 41 is controlled to be separated from the permanent magnet of the bottom plate 12 positioned at the top of the upper layer heating heat exchanger 31, and is rotated to the groove of the isolation plate 33, and after the heating mode 60S state is identified and maintained, the guide plate motor 43 is automatically closed, and the guide plate is firmly fixed and guided by virtue of the air outlet lower pressure and the gravity of the guide plate. The unit judges that the heating operation mode is continuously carried out through the return air temperature sensing bag 7 of the side return air port. When the detected return air temperature is greater than the set temperature plus delta T, the water valve is closed, the fan maintains the current running state, and the lower air port assembly 51 and the side return air assembly synchronously maintain the current state. When the heating mode is exited and the air conditioner is turned off, the air deflector motor 43 is electrified and synchronously acts with the air port assembly 5 to control the air deflector to restore to the original closed position.

The foregoing is merely a specific embodiment of the disclosure to enable one skilled in the art to understand or practice the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A four-pipe ventilation coil device with bidirectional air supply, characterized in that it comprises:

The entire chassis;

A centrifugal fan with a rotatable volute is assembled inside the main unit housing. The centrifugal fan includes a fixed volute, a movable volute, and a volute motor. The movable volute is rotatably disposed within the fixed volute to adjust the airflow direction. The volute motor is driven by the movable volute to rotate. The centrifugal fan also includes forward-curving multi-blade centrifugal fan blades.

A partitioned heat exchanger is disposed within the main unit housing and is arranged corresponding to the airflow path of the centrifugal fan. The partitioned heat exchanger includes an independent upper heating heat exchanger and a lower cooling heat exchanger, which are used to realize heating and cooling functions respectively. An isolation plate is provided between the upper heating heat exchanger and the lower cooling heat exchanger. The isolation plate is fixed to the bottom end of the upper heating heat exchanger and the top end of the lower cooling heat exchanger respectively to form independent heating flow channels and cooling flow channels.

An asymmetric airfoil guide vane is disposed between the partitioned heat exchanger and the centrifugal fan to guide the flow of air between the partitioned heat exchanger and the centrifugal fan; the asymmetric airfoil guide vane includes an upper guide vane corresponding to the upper heating heat exchanger and a lower guide vane corresponding to the lower cooling heat exchanger.

An air vent assembly is provided on the unit housing and is used to realize the intake and exhaust of indoor air; the air vent assembly includes a lower air vent assembly located at the bottom of the unit housing and a side air vent assembly located on the side of the unit housing, the lower air vent assembly includes a cooling return air filter inlet and a heating supply air diffuser inlet, and the side air vent assembly includes a heating return air filter inlet and a cooling supply air diffuser inlet;

The controller is connected to the volute motor and the air outlet assembly respectively, and is used to control the switching of the air outlet direction of the centrifugal fan and the opening and closing of the air outlet assembly.

2. The four-pipe fan coil unit with bidirectional air supply according to claim 1, characterized in that the upper heating heat exchanger and the lower cooling heat exchanger both include inclined heat exchangers, and the layer height of the upper heating heat exchanger is lower than the layer height of the lower cooling heat exchanger.

3. The four-pipe fan coil unit with bidirectional air supply according to claim 2, characterized in that the structural parameters of the inclined heat exchanger included in the upper heating heat exchanger are different from the structural parameters of the inclined heat exchanger included in the lower cooling heat exchanger, and the structural parameters include the number of tube rows, the number of copper tubes and the fin type.

4. The four-pipe fan disc device with bidirectional air supply according to claim 1, characterized in that it further includes a guide plate motor, the guide plate motor being drivenly connected to the upper guide plate and the lower guide plate respectively, for driving the two to switch working positions; the controller being signal-connected to the guide plate motor to control the movement of the asymmetric airfoil guide plate.

5. The four-pipe ventilation disc device with bidirectional air supply according to claim 4, characterized in that the inner wall of the fixed volute is provided with an annular sliding groove, the outer wall of the movable volute is provided with a slider that is slidably adapted to the annular sliding groove, and the movable volute rotates through the cooperation of the slider and the annular sliding groove.

6. The four-pipe fan coil unit with bidirectional air supply according to claim 5, characterized in that the unit further includes a permanent magnet module, the permanent magnet module being disposed on the isolation plate and the bottom plate of the whole unit housing, for adsorbing and fixing the asymmetric airfoil guide plate when the driving component of the asymmetric airfoil guide plate is not energized.

7. The four-pipe fan coil unit with bidirectional air supply according to claim 6, characterized in that, when the controller starts the cooling mode, at the initial position of cooling air supply, the forward multi-blade centrifugal fan starts and operates in a blowing mode to generate airflow power from the centrifugal fan to the partitioned heat exchanger; the blowing airflow of the forward multi-blade centrifugal fan is directed towards the lower guide plate; the buoyancy of the airflow generated by the forward multi-blade centrifugal fan and the adsorption force of the permanent magnet module together define the position of the lower guide plate; the forward multi-blade centrifugal fan is used to drive the airflow to the lower cooling heat exchanger for heat exchange.

8. The four-pipe fan coil unit with bidirectional air supply according to claim 7, characterized in that, when the controller starts the heating mode, in the heating air supply position, the forward multi-blade centrifugal fan starts and operates in a suction mode to generate airflow power from the zoned heat exchanger to the centrifugal fan; the downward pressure of the airflow generated by the forward multi-blade centrifugal fan and the weight of the upper guide plate together limit the position of the upper guide plate; the forward multi-blade centrifugal fan is used to draw indoor air through the heating return air filter of the side air outlet assembly, guide the airflow through the upper heating heat exchanger for heat exchange, and the heated air after heat exchange is then sent out through the heating air supply diffuser of the lower air outlet assembly.

9. The four-pipe fan coil unit with bidirectional air supply according to claim 1, characterized in that it further includes an air outlet component control board, the air outlet component control board being electrically connected to the lower air outlet component and the side air outlet component respectively, and the controller controlling the opening and closing of the lower air outlet component and the side air outlet component through the air outlet component control board.

10. The four-pipe fan coil unit with bidirectional air supply according to claim 9, wherein the controller controls the opening and closing of the cooling return air filter port, the heating air diffuser port, the heating return air filter port and the cooling air diffuser port respectively through the air outlet assembly control board.

11. The four-pipe fan coil unit with bidirectional air supply according to claim 9, characterized in that the unit further includes a return air temperature sensor, the return air temperature sensor including a first temperature sensor corresponding to the lower air outlet assembly and a second temperature sensor corresponding to the side air outlet assembly, the first temperature sensor and the second temperature sensor being signal-connected to the controller for detecting the return air temperature in cooling and heating modes respectively.

12. The four-pipe fan coil unit with bidirectional air supply according to claim 1, characterized in that the unit further includes a water receiving tray, which is disposed at the bottom of the unit housing and corresponds to the lower-level refrigeration heat exchanger.

13. An air conditioner, characterized in that it includes a four-pipe fan coil unit with bidirectional air supply as described in any one of claims 1-12.

14. A control method applied to the air conditioner of claim 13, characterized in that the method comprises:

When the air conditioning unit is in standby mode, the drive components controlling the centrifugal fan, air outlet assembly, and asymmetric airfoil guide vane are all de-energized, keeping the asymmetric airfoil guide vane in a closed state, the air outlet assembly in a sealed state, and the movable volute resets to the initial position of cooling air supply.

When a cooling operation command is received, the cooling control process is executed: the corresponding cooling air outlet in the air outlet assembly is opened, the movable volute is kept in the initial position of cooling air supply, the centrifugal fan is started to operate in a blowing mode, and the asymmetric airfoil guides the airflow to the lower cooling heat exchanger to achieve cooling air supply.

When a heating operation command is received, the heating control process is executed: the corresponding heating air outlet in the air outlet assembly is opened, the volute motor is driven to rotate the movable volute to the heating air supply position, the centrifugal fan is started to operate in suction mode, and the asymmetric airfoil guide vane is controlled to guide the airflow to the upper heating heat exchanger to achieve heating air supply.

When a shutdown command is received, the asymmetric airfoil deflector and air outlet assembly are reset and closed, the movable volute is reset to the initial position of cooling air supply, and the centrifugal fan is turned off.

15. The control method according to claim 14, characterized in that, in the step of executing the refrigeration control process, the method includes:

Control the lower airfoil of the asymmetric airfoil to rotate to the positioning position and fix it, maintain this state for a preset time, and then shut down its drive component;

The return air temperature is detected by the first temperature sensor. If the return air temperature is less than the set temperature - ΔT, the water valve is closed and the current state of the centrifugal fan and the air outlet assembly is maintained.

16. The control method according to claim 14, characterized in that, in the step of executing the heating control process, the method includes:

Control the upper guide vane of the asymmetric airfoil to rotate to the positioning position and fix it, maintain this state for a preset time, and then shut down its drive component;

The return air temperature is detected by the second temperature sensor. If the return air temperature is greater than the set temperature + ΔT, the water valve is closed and the current state of the centrifugal fan and the air outlet assembly is maintained.