Ceiling fresh air fan and control method thereof, fresh air fan system

Abstract

The present application relates to a ceiling fresh air fan and its control method, and a fresh air fan system. The ceiling fresh air fan includes: a housing having a fresh air inlet, an exhaust air outlet, a fresh air outlet and an exhaust air inlet, and a fresh air channel and an exhaust air channel separated from each other formed in the housing; an air valve arranged between the fresh air channel and the exhaust air channel and near the exhaust air inlet, for controlling the connection and isolation between the fresh air outlet and the exhaust air channel; a fan assembly including a fresh air fan arranged in the fresh air channel and an exhaust fan arranged in the exhaust air channel; a unit including an evaporator arranged in the fresh air channel and adjacent to the air valve, a water receiving pan assembly located below the evaporator and connected to the evaporator through a connecting pipe assembly; and a drainage assembly connected to the water receiving pan assembly through a drainage pipe. In the fresh air self-cleaning mode, the ceiling fresh air fan can sterilize, disinfect, and clean the water receiving pan assembly to prevent the water receiving pan assembly from contaminating the fresh air entering the room.

Description

Technical Field

[0001] The present application relates to the technical field of ventilation equipment, and in particular to a ceiling fresh air fan, a control method thereof, and a fresh air fan system. Background Art

[0002] With the development of the economy and the improvement of living standards, people are beginning to pay more and more attention to the quality of life and air quality. Therefore, more and more people are beginning to consider installing fresh air fans at home, and the market for fresh air fans is also growing rapidly.

[0003] Existing fresh air fans can bring in and purify outdoor air and expel polluted indoor air, but they cannot control indoor temperature and humidity. Therefore, fresh air fans with evaporators have emerged, which can control the temperature and humidity of the fresh air introduced into the room. During summer cooling, these fresh air fans continuously generate condensation on the evaporator, which collects in the water collection tray. The water collection tray remains in a humid environment for a long time, which can easily breed bacteria, mold, moss, etc., and produce unpleasant odors, contaminating the fresh air entering the room and potentially harming human health. Summary of the Invention

[0004] The purpose of the present application is to provide a ceiling fresh air fan and its control method, and a fresh air fan system, which can sterilize, disinfect and clean the water tray assembly to prevent the water tray assembly from polluting the fresh air entering the room.

[0005] The evaporator is connected to the air conditioner via a refrigerant pipe, and the evaporator is connected to the air conditioner via a refrigerant pipe. The unit is connected to the machine, the evaporator is arranged in the fresh air channel and is adjacent to the air valve; the water receiving pan assembly is located below the evaporator and is connected to the evaporator through a connecting pipe assembly, the water receiving pan assembly is used to hold condensed water flowing down from the surface of the evaporator; the drainage assembly includes a water pump and a drainage pipe, and the water receiving pan assembly is connected to the water pump through the drainage pipe; wherein, in the fresh air self-cleaning mode, the control unit is switched between the cooling condition and the heating condition, so that the condensed water on the surface of the evaporator and the condensed water on the surface of the water receiving pan assembly frost and defrost into water, and are discharged to the outside through the water pump, and when the unit is in the heating condition, the exhaust fan and the air valve are opened to connect the fresh air outlet with the exhaust channel, and the fresh air airflow at the fresh air outlet flows in the opposite direction through the evaporator and enters the exhaust channel to discharge the high-humidity gas generated during the defrosting process to the outside.

[0006] In one possible embodiment, a partition is provided in the shell to separate the fresh air channel and the exhaust channel; the partition is provided with an opening corresponding to the air valve, and the air valve includes a movable baffle, and the air valve opens or closes the opening through the baffle to control the connection and isolation between the fresh air outlet and the exhaust channel.

[0007] In a possible embodiment, the baffle is rotatably connected to the partition via a pivot to open or close the opening; or, the baffle is slidably connected to the partition via a sliding assembly to open or close the opening.

[0008] In one possible embodiment, the evaporator includes a gas collecting pipe, a diverter and a capillary tube connected to the diverter; the water receiving tray assembly includes a base and a cover body covering the base, the connecting pipe assembly includes a first pipe, a second pipe and a connecting pipe, the connecting pipe is arranged between the base and the cover body, the connecting pipe is connected to the capillary tube through the first pipe, and the connecting pipe is connected to the gas collecting pipe through the second pipe.

[0009] In a possible embodiment, the chassis includes a bottom wall and side walls forming an accommodating cavity, the bottom wall is provided with an elongated groove, the connecting pipe is embedded in the elongated groove, and the side wall is higher than the cover body and is connected to the drain pipe.

[0010] In a possible embodiment, there are multiple long strip grooves, and the multiple long strip grooves are arranged in parallel on the bottom wall. The connecting pipe includes multiple branch pipes that are interconnected, and the multiple branch pipes are respectively embedded in the corresponding long strip grooves.

[0011] In a possible embodiment, the shell is divided into a first space and a second space from bottom to top by a partition, the fresh air fan is arranged in the second space, and the exhaust fan is arranged in the first space.

[0012] In a possible embodiment, the ceiling fresh air fan further includes a full heat exchange core, which is arranged in the shell and close to the first side, and the fresh air channel and the exhaust air channel respectively flow through the full heat exchange core.

[0013] In a possible embodiment, the upper part of the first end of the full heat exchange core forms a fresh air inlet surface, the lower part of the first end of the full heat exchange core forms an exhaust air outlet surface, the upper part of the second end of the full heat exchange core forms an exhaust air inlet surface, and the lower part of the second end of the full heat exchange core forms a fresh air outlet surface. The fresh air inlet is connected to the fresh air inlet surface, the fresh air outlet surface is connected to the fresh air channel, the exhaust inlet is connected to the exhaust air inlet surface, and the exhaust outlet surface is connected to the exhaust channel.

[0014] In a possible embodiment, the ceiling fresh air fan also includes a primary filter, a secondary filter and a tertiary filter. The primary filter is located on the fresh air inlet side of the full heat exchange core, the secondary filter is located on the exhaust air inlet side of the full heat exchange core, and the tertiary filter is located upstream of the evaporator.

[0015] In the second aspect, the embodiment of the present application also provides a control method for a suspended ceiling fresh air fan, including: adjusting the operating mode of the suspended ceiling fresh air fan to the fresh air self-cleaning mode; operating the fresh air fan at the minimum air volume, and controlling the unit to operate for a first period of time under the cooling condition to cause the condensed water on the surface of the evaporator and the condensed water on the surface of the water receiving tray assembly to frost; controlling the unit to operate for a second period of time under the heating condition, heating the water receiving tray assembly and the evaporator through a high-temperature refrigerant to defrost the frost into water; turning off the fresh air fan, opening the exhaust fan and the air valve to connect the fresh air outlet with the exhaust duct, and the fresh air airflow at the fresh air outlet flows in reverse through the evaporator and then enters the exhaust duct to discharge the high-humidity gas generated during the defrosting process to the outside; turning on the water pump to discharge the water to the outside through the drain pipe.

[0016] In a possible embodiment, the control method of the ceiling fresh air fan further includes: controlling the unit to continue operating for a third period of time under the heating condition so that the surface of the water receiving tray assembly and the surface of the evaporator are dried by the high-temperature gas.

[0017] In a third aspect, an embodiment of the present application further provides a fresh air fan system, comprising the ceiling fresh air fan as described above; and an outdoor unit connected to the ceiling fresh air fan through a pipeline, the outdoor unit comprising a compressor and a condenser.

[0018] The embodiments of the present application provide a ceiling fresh air fan and its control method, and a fresh air fan system, by setting an air valve between the fresh air duct and the exhaust duct and near the exhaust inlet, and setting the evaporator in the fresh air duct and adjacent to the air valve, and at the same time setting a water receiving pan assembly below the evaporator, which is connected to the evaporator through a connecting pipe assembly; in the fresh air self-cleaning mode, the control unit switches between the cooling condition and the heating condition, so that the condensed water on the surface of the evaporator and the condensed water on the surface of the water receiving pan assembly frosts and defrosts into water, and is discharged to the outside through a water pump; and when the unit is in the heating condition, the exhaust fan and the air valve are opened to connect the fresh air outlet with the exhaust duct, and the fresh air airflow at the fresh air outlet flows in the opposite direction through the evaporator and then enters the exhaust duct, so as to discharge the high-humidity gas generated during the defrosting process to the outside, so that the water receiving pan assembly can be sterilized, disinfected and cleaned, and the water receiving pan assembly can be prevented from polluting the fresh air entering the room. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings. In the drawings, identical components are denoted by the same reference numerals. The drawings are not drawn to scale and are intended only to illustrate relative positions. Layer thicknesses in certain locations are exaggerated for ease of understanding, and the layer thicknesses depicted in the drawings do not necessarily represent actual layer thickness proportions.

[0020] Figure 1 A schematic diagram of the top view of the ceiling fresh air blower provided in an embodiment of the present application is shown;

[0021] Figure 2 Show Figure 1 The structural diagram of the air valve of the ceiling fresh air fan is shown;

[0022] Figure 3 Show Figure 1 Cross-section along direction DD;

[0023] Figure 4 Show Figure 1 Schematic diagram of the assembly structure of the evaporator and water tray assembly in the ceiling fresh air fan shown;

[0024] Figure 5 Show Figure 4 A schematic structural diagram of the water tray assembly in FIG.

[0025] Figure 6 A flow chart showing a method for controlling a ceiling fresh air blower provided in an embodiment of the present application is shown.

[0026] 1. Housing; 1a. Fresh air duct; 1b. Exhaust air duct; 1c. First-layer space; 1d. Second-layer space; 10. Air valve; 101. Baffle; 11. Fresh air inlet; 12. Exhaust air outlet; 13. Fresh air outlet; 14. Exhaust air inlet; 16. Partition; O. Opening; P1. First position; P2. Second position;

[0027] 2. Fan assembly; 21. Fresh air fan; 22. Exhaust fan;

[0028] 3. Evaporator;

[0029] 4. Water tray assembly; 41. Base; 411. Bottom wall; 412. Side wall; 413. Long strip groove; 42. Cover; 43. Connecting pipe assembly; 431. First pipe; 432. Second pipe; 430. Connecting pipe;

[0030] 52. Drain pipe;

[0031] 6. Full heat exchange core; 61. Fresh air inlet; 62. Exhaust air outlet; 63. Exhaust air inlet; 64. Fresh air outlet;

[0032] 71. Primary filter; 72. Secondary filter; 73. Tertiary filter;

[0033] 8. Electrical box assembly. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] An embodiment of the present application provides a fresh air fan system, including a ceiling fresh air fan and an outdoor unit. The outdoor unit includes a compressor and a condenser. The outdoor unit is connected to the ceiling fresh air fan through a pipeline.

[0036] The ceiling fresh air fan can introduce purified outdoor air and discharge indoor dirty air. In order to control the indoor temperature and humidity, the ceiling fresh air fan of this application adds an evaporator. The evaporator is connected to the compressor of the outdoor unit through a refrigerant pipeline. The compressor, condenser and evaporator serve as dehumidification components, which can control the temperature and humidity of the fresh air introduced into the room. Among them, the compressor and condenser are arranged in the outdoor unit, which can simplify the structure of the ceiling fresh air fan, reduce the volume of the ceiling fresh air fan, and also facilitate the installation and disassembly of the ceiling fresh air fan.

[0037] When the ceiling fresh air fan is cooling in the summer, the evaporator will continuously condense, and the condensed water will collect in the water collection tray assembly. The water collection tray assembly is in a humid environment for a long time, which is prone to breeding bacteria, mold, moss, etc., and will produce unpleasant odors, pollute the fresh air sent into the room, and may be harmful to human health.

[0038] To this end, the ceiling fresh air blower provided in the embodiment of the present application can sterilize, disinfect, and clean the water tray assembly, thereby preventing the water tray assembly from contaminating the fresh air entering the room. The specific structure of the ceiling fresh air blower provided in the embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0039] like Figures 1 to 3 As shown, an embodiment of the present application provides a ceiling fresh air fan, comprising: a shell 1, a fan assembly 2, an evaporator 3, a water receiving tray assembly 4 and a drainage assembly.

[0040] The shell 1 has a first side and a second side arranged opposite to each other. The first side is provided with a fresh air inlet 11 and an exhaust outlet 12, and the second side is provided with a fresh air outlet 13 and an exhaust inlet 14. A fresh air channel 1a and an exhaust channel 1b separated from each other are formed in the shell 1. The fresh air inlet 11 and the fresh air outlet 13 are connected to the fresh air channel 1a, and the exhaust inlet 14 and the exhaust outlet 12 are connected to the exhaust channel 1b.

[0041] Damper 10 is located between fresh air duct 1a and exhaust duct 1b, near exhaust inlet 14, to control the connection and isolation between fresh air outlet 13 and exhaust duct 1b. Evaporator 3, connected to the compressor via a refrigerant pipeline, is located within fresh air duct 1a and adjacent to damper 10.

[0042] The fan assembly 2 includes a fresh air fan 21 arranged in the fresh air channel 1a and an exhaust fan 22 arranged in the exhaust channel 1b.

[0043] The water receiving tray assembly 4 is located below the evaporator 3 and is connected to the water receiving tray assembly 43 (see Figure 5 ) is connected to the evaporator 3, and the water receiving pan assembly 4 is used to hold the condensed water flowing down from the surface of the evaporator 3. The drainage assembly includes a water pump (not shown) and a drain pipe 52, and the water receiving pan assembly 4 is connected to the water pump through the drain pipe 52.

[0044] Among them, in the fresh air self-cleaning mode, the control unit switches between the cooling condition and the heating condition, so that the condensed water on the surface of the evaporator 3 and the condensed water on the surface of the water receiving tray assembly 4 frosts and defrosts into water, and is discharged to the outside through the water pump. When the unit is in the heating condition, the exhaust fan 22 and the air valve 10 are turned on to connect the fresh air outlet 13 with the exhaust channel 1b. The fresh air flow at the fresh air outlet 13 flows in the opposite direction through the evaporator 3 and enters the exhaust channel 1b to discharge the high-humidity gas generated during the defrosting process to the outside.

[0045] In this embodiment, the air valve 10 is arranged between the fresh air channel 1a and the exhaust channel 1b and close to the exhaust inlet 14. By controlling the opening or closing of the air valve 10, the connection and isolation of the fresh air outlet 13 and the exhaust channel 1b can be achieved, thereby controlling the flow direction of the refrigerant.

[0046] Furthermore, the ceiling fresh air blower has a fresh air self-cleaning mode. During summer cooling, the surface of the evaporator 3 will continuously condense, and the condensed water will collect on the water receiving pan assembly 4. When the control unit is operating in the cooling mode, the fresh air blower 21 operates at a small air volume for the first period of time, driving the humid air to circulate in the shell 1, and the compressor has a high output, so that the condensed water on the surface of the evaporator 3 and the condensed water on the surface of the water receiving pan assembly 4 quickly frosts; then the control unit switches to the heating mode and operates for the second period of time, by increasing the frequency of the compressor to increase the compressor exhaust temperature, so that the high-temperature refrigerant flows through the connecting pipe assembly 43 of the water receiving pan assembly 4, and heats the water receiving pan assembly 4, and the frost on the surface of the evaporator 3 and the surface of the water receiving pan assembly 4 quickly defrosts into water. Among them, the first period and the second period can be pre-set through experiments and are not limited here.

[0047] At the same time, the fresh air fan 21 is turned off, and the exhaust fan 22 and the air valve 10 are opened to connect the fresh air outlet 13 with the exhaust duct 1b. The fresh air flow at the fresh air outlet 13 flows in the opposite direction through the evaporator 3 and then enters the exhaust duct 1b. Figure 1 As shown by the arrow A in the figure, the high-humidity gas generated during the defrosting process is discharged to the outside. As a result, the unit continuously frosts and defrosts the water tray assembly 4 by switching between cooling and heating conditions, allowing the surfaces of the evaporator 3 and the water tray assembly 4 to quickly exchange heat, achieving high-temperature sterilization and cleaning. In addition, auxiliary defrosting is achieved by exhausting clean fresh air, which can increase the defrosting speed, improve the self-cleaning effect of the unit, and exhaust high-humidity gas with a musty odor to the outside, making it healthier and more comfortable for users to use, meeting people's demand for clean air and helping to improve user satisfaction.

[0048] The water pump is then turned on to drain dirt from the surfaces of the water tray assembly 4 and evaporator 3, along with the defrosted water, thereby ensuring regular cleaning of the water tray assembly 4. Once the water in the water tray assembly 4 is completely drained, the water pump stops. The unit can continue operating for a third duration, which can be preset through testing, until both the water tray assembly 4 and the evaporator 3 are completely dried at high temperature. This maintains the cleanliness of the water tray, preventing the growth of bacteria, mold, and moss, and preventing unpleasant odors that could contaminate the fresh air entering the room.

[0049] The ceiling fresh air blower and fresh air blower system provided in the embodiment of the present application are provided with an air valve 10 between the fresh air duct 1a and the exhaust duct 1b and near the exhaust inlet 14, and the evaporator 3 is provided in the fresh air duct 1a and adjacent to the air valve 10. At the same time, a water receiving pan assembly 4 is provided below the evaporator 3, and the water receiving pan assembly 4 is connected to the evaporator 3 through the connecting pipe assembly 43; in the fresh air self-cleaning mode, the control unit switches between the cooling mode and the heating mode to make the condensed water on the surface of the evaporator 3 The condensed water on the surface of the water receiving tray assembly 4 frosts and defrosts into water, and is discharged to the outside through a water pump. When the unit is in heating mode, the exhaust fan 22 and the air valve 10 are turned on to connect the fresh air outlet 13 with the exhaust channel 1b. The fresh air flow at the fresh air outlet 13 flows in the opposite direction through the evaporator 3 and then enters the exhaust channel 1b to discharge the high-humidity gas generated during the defrosting process to the outside, so that the water receiving tray assembly 4 can be sterilized, disinfected and cleaned to avoid the water receiving tray assembly 4 from polluting the fresh air entering the room.

[0050] In some embodiments, a partition 15 is provided in the shell 1 to separate the fresh air channel 1a and the exhaust channel 1b; the partition 15 is provided with an opening O corresponding to the air valve 10, and the air valve 10 includes a movable baffle 101. The air valve 10 opens or closes the opening O through the baffle 101 to control the connection and isolation between the fresh air outlet 13 and the exhaust channel 1b.

[0051] like Figure 2 As shown, in one example, the baffle 101 is rotatably connected to the partition 15 via a pivot to open or close the opening O. The air damper 10 has two positions. When the baffle 101 rotates to the first position P1, the opening O is opened to connect the fresh air outlet 13 with the exhaust duct 1b, and the fresh air self-cleaning mode is activated. When the baffle 101 rotates to the second position P2, the opening O is closed to isolate the fresh air outlet 13 from the exhaust duct 1b, and the normal working mode is activated.

[0052] In another example, the baffle 101 is slidably connected to the partition 15 via a sliding assembly to open or close the opening O. The air valve 10 has two positions. When the baffle 101 slides to the first position P1, the opening O is opened to connect the fresh air outlet 13 with the exhaust duct 1b, and the fresh air self-cleaning mode is activated. When the baffle 101 slides to the second position P2, the opening O is closed to isolate the fresh air outlet 13 from the exhaust duct 1b, and the normal operation mode is activated.

[0053] In some embodiments, the evaporator 3 includes a gas collecting pipe, a diverter and a capillary tube connected to the diverter; the water receiving tray assembly 4 includes a base 41 and a cover body 42 covering the base 41, and the connecting pipe assembly 43 includes a first pipe 431, a second pipe 432 and a connecting pipe 430. The connecting pipe 430 is arranged between the base 41 and the cover body 42. The connecting pipe 430 is connected to the capillary tube through the first pipe 431, and the connecting pipe 430 is connected to the gas collecting pipe through the second pipe 432.

[0054] Optionally, the connecting pipe assembly 43 is a copper pipe with good thermal conductivity. Since the water receiving pan assembly 4 is connected to the evaporator 3 via the first pipe 431 and the second pipe 432, and the connecting pipe 430 is disposed between the base 41 and the cover 42, the water receiving pan assembly 4 can maintain a high or low temperature synchronized with the evaporator 3, thereby achieving cleaning operations such as frosting and defrosting of the water receiving pan assembly 4.

[0055] In some embodiments, the chassis 41 includes a bottom wall 411 and a side wall 412 that form a accommodating cavity. The bottom wall 411 is provided with a long strip groove 413, and the connecting pipe 430 is embedded in the long strip groove 413. The side wall 412 is higher than the cover body 42 and is connected to the drain pipe 52.

[0056] like Figure 4 and Figure 5 As shown, the bottom wall 411 of the chassis 41 is provided with an elongated groove 413, into which the connecting pipe 430 is embedded. The low or high temperature of the connecting pipe 430 can be directly transferred to the bottom wall 411, thereby improving the cleaning efficiency of the frosting and defrosting of the water receiving tray assembly 4. The cover 42 is an integrally formed structure. The cover 42 covers the bottom wall 411 of the chassis 41, which can seal the water, so that the water receiving tray assembly 4 has a receiving cavity for accommodating the evaporator 3. Condensed water on the surface of the evaporator 3 can flow into the receiving cavity, preventing the condensed water from overflowing. Because the side wall 412 is higher than the cover 42 and connected to the drain pipe 52, when the water level of the condensed water reaches the position of the drain pipe 52, the water can be discharged outdoors through a water pump.

[0057] Furthermore, there are multiple elongated grooves 413, which are arranged parallel to the bottom wall 411. The connecting pipe 430 includes multiple interconnected branch pipes 431, each of which is embedded in a corresponding elongated groove 413. The multiple branch pipes 431 are evenly distributed within the multiple elongated grooves 413 of the bottom plate 41, so that the entire water receiving tray assembly 4 is heated evenly, ensuring that the water receiving tray assembly 4 is frosted or defrosted at the same time, thereby improving self-cleaning efficiency.

[0058] In some embodiments, the housing 1 is divided into a first space 1c and a second space 1d from bottom to top by a partition 16. The fresh air fan 21 is located in the second space 1d, and the exhaust fan 22 is located in the first space 1c. The fresh air fan 21 and the exhaust fan 22 are each independently driven by a motor, facilitating separate control. The fresh air fan 21 and the exhaust fan 22 are arranged in layers in the vertical direction, making full use of the height space of the housing 1 to design the air duct, saving as much space as possible within the housing 1, reducing the overall size of the ceiling fresh air fan, and simultaneously achieving the purpose of reducing resistance.

[0059] In some embodiments, the ceiling fresh air fan further includes a heat exchange core 6, which is disposed within the housing 1 near the first side. The fresh air duct 1a and the exhaust air duct 1b respectively flow through the heat exchange core 6. The heat exchange core 6 is disposed within the housing 1 near the first side, and the fresh air fan 21 and the exhaust air fan 22 are disposed near the second side of the housing. This makes the ceiling fresh air fan more compact and smaller overall.

[0060] In some embodiments, the upper portion of the first end of the heat exchange core 6 forms a fresh air inlet surface 61, the lower portion of the first end of the heat exchange core 6 forms an exhaust air outlet surface 62, the upper portion of the second end of the heat exchange core 6 forms an exhaust air inlet surface 63, and the lower portion of the second end of the heat exchange core 6 forms a fresh air outlet surface 64. The fresh air inlet 11 is connected to the fresh air inlet surface 61, the fresh air outlet surface 64 is connected to the fresh air duct 1a, the exhaust inlet 14 is connected to the exhaust air inlet surface 63, and the exhaust air outlet surface 62 is connected to the exhaust duct 1b. This configuration can reduce the volume of the heat exchange core 6, thereby making the ceiling fresh air blower more compact and smaller in overall size.

[0061] Optionally, the heat exchange core 6 is in the shape of a hexagonal prism, wherein the upper and lower surfaces are connected to the shell 1 as mounting surfaces. Optionally, the heat exchange core 6 is in the shape of a quadrangular prism, wherein the two corners of the quadrangular prism-shaped heat exchange core 6 are connected to the shell 1.

[0062] Furthermore, the ceiling fresh air fan also includes a primary filter 71, a secondary filter 72 and a tertiary filter 73. The primary filter 71 is located on the fresh air inlet surface 61 of the full heat exchange core 6, the secondary filter 72 is located on the exhaust air inlet surface 63 of the full heat exchange core 6, and the tertiary filter 73 is located upstream of the evaporator 3.

[0063] Optionally, the primary filter 71, the secondary filter 72 and the tertiary filter 73 all use segmented filter screens, which are convenient for extracting and replacing the filter screens in a narrow space. Among them, the primary filter 71 serves as a medium-efficiency filter, which has a primary dust filter screen for filtering large particles of impurities, filtering impurities in the air, and preventing them from being attached to the fresh air inlet surface 61 of the full heat exchange core 6 and affecting normal operation. The secondary filter 72 serves as a coarse-effect filter, which can further remove most of the particulate impurities in the air and further improve the air quality; the tertiary filter 73 serves as a high-efficiency filter, which has an activated carbon adsorption mesh layer, which can adsorb and purify the dehumidified air, remove pollutants such as toluene and formaldehyde in the air, and can remove odors to ensure that the output air is effectively purified.

[0064] Therefore, the working principle of the ceiling fresh air fan in the embodiment of the present application is as follows:

[0065] In normal working mode, if Figure 1 As shown in the direction of arrow C, outdoor air enters the fresh air channel of the housing 1 through the fresh air inlet 11, passes through the primary filter 71, the full heat exchange core 6, the fresh air fan 21, the tertiary filter 73, the evaporator 3, and the fresh air outlet 13 into the room; Figure 1 As shown in the direction of the middle arrow B, indoor air enters the exhaust duct of the shell 1 through the exhaust inlet 14, passes through the secondary filter 72, the full heat exchange core 6, the exhaust fan 22, and the exhaust outlet 12 and is discharged outdoors; the two air flows complete the exchange of temperature and humidity when they intersect at the full heat exchange core 6.

[0066] In the fresh air self-cleaning mode, the unit is controlled to switch between cooling and heating conditions, so that the condensed water on the surface of the evaporator 3 and the condensed water on the surface of the water receiving pan assembly 4 frosts and defrosts into water, and is discharged to the outside through the water pump; at the same time, when the unit is in the heating condition, such as Figure 1 As shown in the direction of the middle arrow A, the exhaust fan 22 and the air valve 10 are opened to connect the fresh air outlet 13 with the exhaust channel 1b. The fresh air flow at the fresh air outlet 13 flows in the opposite direction through the evaporator 3 and enters the exhaust channel 1b, so that the high-humidity gas generated during the defrosting process passes through the secondary filter 72, the full heat exchange core 6, the exhaust fan 22, and the exhaust outlet 12 and is discharged outdoors.

[0067] The ceiling-mounted fresh air blower also includes an electrical box assembly 8, which is located outside the housing 1 in correspondence with the fan assembly 2 and is electrically connected to the fan assembly 2 via a cable. Furthermore, the edge of the housing 1 is provided with a plurality of lifting ears, which facilitate the fresh air blower to be hoisted to a roof or wall, etc.

[0068] like Figure 6 As shown, the embodiment of the present application provides a control method for the ceiling fresh air fan as described above, comprising:

[0069] Step S1: Adjust the operating mode of the ceiling fresh air fan to the fresh air self-cleaning mode;

[0070] Step S2: operating the fresh air fan 21 at a minimum air volume, and controlling the unit to operate under the cooling condition for a first period of time, so that the condensed water on the surface of the evaporator 3 and the surface of the water receiving pan assembly 4 is frosted;

[0071] Step S3: Control the unit to operate under the heating condition for a second time period, and heat the water pan assembly 4 and the evaporator 3 through the high-temperature refrigerant to defrost the frost into water;

[0072] Step S4: Turn off the fresh air fan 21, open the exhaust fan 22 and the air valve 10, so that the fresh air outlet 13 is connected to the exhaust duct 1b, and the fresh air at the fresh air outlet 13 flows in the opposite direction through the evaporator 3 and then enters the exhaust duct 1b, so as to discharge the high-humidity gas generated during the defrosting process outdoors;

[0073] Step S5: Turn on the water pump to drain the water outdoors through the drain pipe 52.

[0074] Furthermore, the control method of the ceiling fresh air fan also includes:

[0075] The unit is controlled to continue operating for a third time period in the heating mode to allow the surface of the water tray assembly 4 and the surface of the evaporator 3 to be completely dried by the high-temperature gas. The first time period, the second time period, and the third time period can be preset through experiments and are not limited here.

[0076] The control method of the ceiling fresh air fan provided in the embodiment of the present application is to set an air valve 10 between the fresh air duct 1a and the exhaust duct 1b and near the exhaust inlet 14, and set the evaporator 3 in the fresh air duct 1a and adjacent to the air valve 10, and at the same time set a water receiving pan assembly 4 below the evaporator 3, and the water receiving pan assembly 4 is connected to the evaporator 3 through the connecting pipe assembly 43; in the fresh air self-cleaning mode, the control unit is switched between the cooling mode and the heating mode, so that the condensed water on the surface of the evaporator 3 and the condensed water on the surface of the water receiving pan assembly 4 are frosted and defrosted into water, and discharged to the outside through the water pump, and when the unit is in the heating mode, the exhaust fan 22 and the air valve 10 are opened to connect the fresh air outlet 13 with the exhaust duct 1b, and the fresh air airflow at the fresh air outlet 13 flows in the opposite direction through the evaporator 3 and then enters the exhaust duct 1b, so that the high-humidity gas generated during the defrosting process is discharged to the outside, so that the water receiving pan assembly 4 can be sterilized, disinfected and cleaned, thereby preventing the water receiving pan assembly 4 from polluting the fresh air entering the room.

[0077] It should be noted that references in this specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," and the like indicate that the described embodiment may include a particular feature, structure, or characteristic, but not necessarily every embodiment includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0078] It should be readily understood that “on,” “above,” and “over” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0079] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be in other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0080] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A ceiling fresh air fan connected to an outdoor unit through a pipeline, wherein the outdoor unit includes a compressor and a condenser, characterized in that: The new air blower comprises: The housing has a first side and a second side arranged opposite to each other, the first side is provided with a fresh air inlet and an exhaust air outlet, the second side is provided with a fresh air outlet and an exhaust air inlet, a fresh air channel and an exhaust air channel separated from each other are formed in the housing, the fresh air inlet and the fresh air outlet are in communication with the fresh air channel, and the exhaust air inlet and the exhaust outlet are in communication with the exhaust air channel; an air valve, disposed between the fresh air channel and the exhaust channel and close to the exhaust inlet, for controlling the connection and isolation between the fresh air outlet and the exhaust channel; a fan assembly, comprising a fresh air fan disposed in the fresh air passage and an exhaust fan disposed in the exhaust passage; an evaporator, connected to the compressor via a refrigerant pipeline, the evaporator being arranged in the fresh air channel and adjacent to the air valve; a water receiving tray assembly, located below the evaporator and connected to the evaporator through a connecting pipe assembly, the water receiving tray assembly being used to hold condensed water flowing down from the surface of the evaporator; A drainage assembly, comprising a water pump and a drainage pipe, wherein the water receiving pan assembly is connected to the water pump through the drainage pipe; Among them, in the fresh air self-cleaning mode, the control unit is switched between the cooling condition and the heating condition, so that the condensed water on the surface of the evaporator and the condensed water on the surface of the water receiving tray assembly frosts and defrosts into water, and is discharged to the outside through the water pump. When the unit is in the heating condition, the exhaust fan and the air valve are opened to connect the fresh air outlet with the exhaust channel. The fresh air flow at the fresh air outlet flows in the opposite direction through the evaporator and then enters the exhaust channel to discharge the high-humidity gas generated during the defrosting process to the outside.

2. The ceiling fresh air blower according to claim 1, characterized in that: A partition is provided in the housing to separate the fresh air channel from the exhaust channel; The partition is provided with an opening corresponding to the air valve, and the air valve includes a movable baffle. The air valve opens or closes the opening through the baffle to control the communication and isolation between the fresh air outlet and the exhaust channel.

3. The ceiling fresh air blower according to claim 2, characterized in that: The baffle is rotatably connected to the partition via a pivot to open or close the opening; Alternatively, the baffle is slidably connected to the partition via a sliding assembly to open or close the opening.

4. The ceiling fresh air blower according to claim 1, characterized in that: The evaporator includes a gas collecting pipe, a flow divider and a capillary tube connected to the flow divider; The water receiving tray assembly includes a base and a cover body covering the base, the connecting pipe assembly includes a first pipeline, a second pipeline and a connecting pipe, the connecting pipe is arranged between the base and the cover body, the connecting pipe is connected to the capillary tube through the first pipeline, and the connecting pipe is connected to the gas collecting pipe through the second pipeline.

5. The ceiling fresh air blower according to claim 4, characterized in that: The chassis includes a bottom wall and side walls forming an accommodating cavity. The bottom wall is provided with an elongated groove. The connecting pipe is embedded in the elongated groove. The side wall is higher than the cover body and communicates with the drain pipe.

6. The ceiling fresh air blower according to claim 5, characterized in that: There are multiple elongated grooves, and the multiple elongated grooves are arranged in parallel on the bottom wall. The connecting pipe includes multiple sections of branch pipes that are interconnected, and the multiple sections of branch pipes are respectively embedded in the corresponding elongated grooves.

7. The ceiling fresh air blower according to claim 2, characterized in that: The shell is divided into a first space and a second space from bottom to top by the partition plate. The fresh air fan is arranged in the second space, and the exhaust fan is arranged in the first space.

8. The ceiling fresh air blower according to claim 1, characterized in that: It also includes a full heat exchange core, which is arranged in the shell and close to the first side, and the fresh air channel and the exhaust air channel flow through the full heat exchange core respectively.

9. The ceiling fresh air blower according to claim 8, characterized in that: The upper part of the first end of the full heat exchange core forms a fresh air inlet surface, the lower part of the first end of the full heat exchange core forms an exhaust air outlet surface, the upper part of the second end of the full heat exchange core forms an exhaust air inlet surface, and the lower part of the second end of the full heat exchange core forms a fresh air outlet surface, the fresh air inlet is connected to the fresh air inlet surface, the fresh air outlet surface is connected to the fresh air channel, the exhaust inlet is connected to the exhaust air inlet surface, and the exhaust air outlet surface is connected to the exhaust channel.

10. The ceiling fresh air blower according to claim 9, characterized in that: It also includes a primary filter, a secondary filter and a tertiary filter. The primary filter is located on the fresh air inlet side of the full heat exchange core, the secondary filter is located on the exhaust air inlet side of the full heat exchange core, and the tertiary filter is located upstream of the evaporator.

11. A control method for a ceiling fresh air blower according to any one of claims 1 to 10, characterized in that: include: Adjust the operating mode of the ceiling fresh air fan to the fresh air self-cleaning mode; Run the fresh air fan at minimum air volume, and control the unit to operate for the first time under the cooling condition, so that the condensed water on the surface of the evaporator and the surface of the water receiving pan assembly frosts; controlling the unit to operate for a second period of time under the heating condition, heating the water receiving pan assembly and the evaporator by means of a high-temperature refrigerant, so as to defrost the frost into water; The fresh air fan is turned off, and the exhaust fan and the air valve are opened to connect the fresh air outlet with the exhaust passage. The fresh air at the fresh air outlet flows in the reverse direction through the evaporator and then enters the exhaust passage, so as to discharge the high-humidity gas generated during the defrosting process outdoors. Turn on the water pump and drain the water outside through the drain pipe.

12. The control method according to claim 11, characterized in that: Also includes: The unit is controlled to continue operating for a third period of time under the heating condition, so that the surface of the water receiving pan assembly and the surface of the evaporator are completely dried by the high-temperature gas.

13. A new air blower system, characterized in that: include: The ceiling fresh air fan according to any one of claims 1 to 10; and The outdoor unit is connected to the ceiling fresh air fan through a pipeline, and the outdoor unit includes a compressor and a condenser.

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