CN220892472U - Ceiling fresh air fan and fresh air fan system - Google Patents

Abstract

The application relates to a new fan of a suspended ceiling and a new fan system, wherein the new fan of the suspended ceiling comprises: the shell is provided with a fresh air inlet, an air exhaust outlet, a fresh air outlet and an air exhaust inlet, and a fresh air channel and an air exhaust channel which are mutually separated are formed in the shell; the air valve is arranged between the fresh air channel and the air exhaust channel and is close to the air exhaust inlet and used for controlling the communication and isolation between the fresh air outlet and the air exhaust channel; the fan assembly comprises a fresh air fan arranged in the fresh air channel and an exhaust fan arranged in the exhaust channel; the unit comprises an evaporator which is arranged in the fresh air channel and is adjacent to the air valve, and a water receiving disc assembly which is positioned below the evaporator and is communicated with the evaporator through a connecting pipe assembly; and the drainage assembly is communicated with the water receiving disc assembly through a drainage pipe. Under the new trend self-cleaning mode, new fan of furred ceiling can disinfect, clean the water collector subassembly, avoids the water collector subassembly to get into indoor new trend and cause the pollution.

Description

Ceiling fresh air fan and fresh air fan system

Technical Field

The present application relates to the technical field of ventilation equipment, and in particular to a ceiling fresh air fan and a fresh air fan system.

Background technique

With the development of 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.

Existing fresh air fans can introduce and purify outdoor air and exhaust indoor dirty air, but they cannot control the temperature and humidity of the room. Therefore, fresh air fans with evaporators have emerged, which can control the temperature and humidity of the fresh air introduced into the room. When this fresh air fan is cooling in summer, the evaporator will continuously condense, and the condensed water will collect on the water receiving tray. The water receiving tray is in a humid environment for a long time, which is easy to breed bacteria, mold, moss, etc., and produce unpleasant odors, pollute the fresh air sent into the room, and may be harmful to human health.

Utility Model Content

The purpose of the present application is to provide a ceiling fresh air fan 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.

In a first aspect, an embodiment of the present application provides a ceiling fresh air fan connected to an outdoor unit through a pipeline, the outdoor unit includes a compressor and a condenser, the ceiling fresh air fan includes: a shell having 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 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 shell, the fresh air inlet and the fresh air outlet are connected to the fresh air channel, and the exhaust air inlet and the exhaust outlet are connected to the exhaust channel; an air valve is arranged between the fresh air channel and the exhaust channel and close to the exhaust inlet, and is used to control the connection and isolation between the fresh air outlet and the exhaust channel; a fan assembly includes a fresh air fan arranged in the fresh air channel and an exhaust fan arranged in the exhaust channel; an evaporator connected to the compressor through a refrigerant pipeline The unit is connected to the fresh air self-cleaning mode, the evaporator is arranged in the fresh air channel and is adjacent to the air valve; a water collecting pan assembly is located below the evaporator and is connected to the evaporator through a connecting pipe assembly, the water collecting pan assembly is used to hold condensed water flowing down from the surface of the evaporator; a drainage assembly includes a water pump and a drainage pipe, and the water collecting pan assembly is connected to the water pump through the drainage pipe; wherein, in the fresh air self-cleaning mode, the unit is controlled to switch 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 collecting pan assembly frosts and defrosts into water, and is discharged to the outdoors 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, so as to discharge the high-humidity gas generated during the defrosting process to the outdoors.

In a possible embodiment, a partition is provided in the shell to separate the fresh air channel and the exhaust air 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 air channel.

In a possible implementation, 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.

In a 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 covered on 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.

In a possible implementation, the chassis includes a bottom wall and side walls that form a receiving cavity, the bottom wall is provided with a long strip groove, the connecting pipe is embedded in the long strip groove, and the side wall is connected to the drain pipe at a position higher than the cover body.

In a possible implementation, 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 corresponding long strip grooves.

In a possible implementation, 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 air fan is arranged in the first space.

In a possible implementation, the ceiling fresh air fan further includes a full heat exchange core, which is disposed 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.

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

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.

In a second aspect, an embodiment of the present application further provides a fresh air fan system, comprising the suspended ceiling fresh air fan as described above; and an outdoor unit, which is connected to the suspended ceiling fresh air fan through a pipeline, and the outdoor unit comprises a compressor and a condenser.

The embodiments of the present application provide a suspended 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, and the water receiving pan assembly is connected to the evaporator through a connecting pipe assembly; 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 frosts and defrosts into water, and is discharged to the outside through a 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 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 that the high-humidity gas generated in the defrosting process can be discharged 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

The features, advantages and technical effects of the exemplary embodiments of the present application will be described below with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals are used for the same components. The accompanying drawings are not drawn according to the actual scale, but are only used to illustrate the relative position relationship. The layer thickness of some parts is exaggerated for easy understanding, and the layer thickness in the accompanying drawings does not represent the proportional relationship of the actual layer thickness.

FIG1 is a schematic diagram showing a top view of a ceiling fresh air blower provided in an embodiment of the present application;

FIG2 is a schematic diagram showing the structure of the air valve of the ceiling fresh air fan shown in FIG1 ;

Fig. 3 shows a cross-sectional view of Fig. 1 along the direction D-D;

FIG4 is a schematic diagram showing the assembly structure of the evaporator and the water receiving pan assembly in the ceiling fresh air fan shown in FIG1 ;

FIG5 is a schematic structural diagram of the water receiving tray assembly in FIG4 ;

FIG6 is a flowchart showing a method for controlling a ceiling fresh air blower provided in an embodiment of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

1. Shell; 1a. Fresh air passage; 1b. Exhaust air passage; 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;

2. Fan assembly; 21. Fresh air fan; 22. Exhaust fan;

3. Evaporator;

4. water tray assembly; 41. bottom plate; 411. bottom wall; 412. side wall; 413. long strip groove; 42. cover body; 43. connecting pipe assembly; 431. first pipeline; 432. second pipeline; 430. connecting pipe;

52. Drain pipe;

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

71. Primary filter; 72. Secondary filter; 73. Tertiary filter;

8. Electrical box assembly.

Detailed ways

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

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, and the outdoor unit is connected to the ceiling fresh air fan through a pipeline.

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 the present 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 size of the ceiling fresh air fan, and also facilitate the installation and disassembly of the ceiling fresh air fan.

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

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 to prevent the water tray assembly from polluting 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 in conjunction with the accompanying drawings.

As shown in FIG. 1 to FIG. 3 , a ceiling fresh air fan provided in an embodiment of the present application includes: a housing 1 , a fan assembly 2 , an evaporator 3 , a water receiving tray assembly 4 and a drainage assembly.

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

The air valve 10 is disposed between the fresh air passage 1a and the exhaust air passage 1b and near the exhaust air inlet 14, and is used to control the connection and isolation between the fresh air outlet 13 and the exhaust air passage 1b. The evaporator 3 is connected to the compressor through a refrigerant pipeline, and the evaporator 3 is disposed in the fresh air passage 1a and adjacent to the air valve 10.

The fan assembly 2 includes a fresh air fan 21 disposed in the fresh air passage 1a and an exhaust air fan 22 disposed in the exhaust air passage 1b.

The water receiving pan assembly 4 is located below the evaporator 3 and is connected to the evaporator 3 through a connecting pipe assembly 43 (see FIG. 5 ). The water receiving pan assembly 4 is used to hold condensed water flowing down from the surface of the evaporator 3. The drainage assembly includes a water pump (not shown in the figure) and a drainage pipe 52. The water receiving pan assembly 4 is connected to the water pump through the drainage pipe 52.

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 then enters the exhaust channel 1b, so that the high-humidity gas generated during the defrosting process is discharged to the outside.

In this embodiment, the air valve 10 is arranged between the fresh air channel 1a and the exhaust air channel 1b and close to the exhaust air 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 air channel 1b can be achieved, thereby controlling the flow direction of the refrigerant.

Furthermore, the ceiling fresh air fan has a fresh air self-cleaning mode. During summer cooling, the surface of the evaporator 3 will continue to condense, and the condensed water will gather on the water receiving pan assembly 4. When the control unit is operated in the cooling condition, the fresh air fan 21 runs for the first time at a small air volume, 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 surface of the water receiving pan assembly 4 will frost quickly; then the control unit switches to the heating condition and runs for the second time, and the compressor exhaust temperature is increased by increasing the frequency of the compressor, so that the high-temperature refrigerant flows through the connecting pipe assembly 43 of the water receiving pan assembly 4, and the water receiving pan assembly 4 is heated, and the frost on the surface of the evaporator 3 and the surface of the water receiving pan assembly 4 is quickly frost into water. Among them, the first time and the second time can be preset through experiments, and there is no restriction here.

At the same time, the fresh air fan 21 is turned off, and the exhaust fan 22 and the air valve 10 are turned on, so that the fresh air outlet 13 is connected to the exhaust channel 1b, and 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, as shown by the arrow direction A in Figure 1, so as to discharge the high-humidity gas generated during the defrosting process to the outside. Thus, the unit continuously frosts and defrosts the water tray assembly 4 by switching between the cooling mode and the heating mode, so that the surface of the evaporator 3 and the surface of the water tray assembly 4 can quickly exchange heat and cold, and achieve high-temperature sterilization and cleaning. In addition, auxiliary defrosting can be achieved by exhausting the clean fresh air flow, which can increase the defrosting speed, improve the self-cleaning effect of the unit, and exhaust the high-humidity gas with a musty smell to the outside. Users are healthier and more comfortable to use, meeting people's demand for clean air and helping to improve user satisfaction.

Then, the water pump is turned on to drain the dirt on the surface of the water receiving pan assembly 4 and the evaporator 3 together with the defrosted water, so that the water receiving pan assembly 4 can be cleaned regularly. When the water in the water receiving pan assembly 4 is drained, the water pump stops working. The unit can continue to operate for a third time period, which can be preset through experiments until the water receiving pan assembly 4 and the evaporator 3 are both dried at high temperature, so that the water receiving pan can be kept clean, and the growth of bacteria, mold, and moss can be prevented, so as to avoid the generation of unpleasant odors that pollute the fresh air sent into the room.

The ceiling fresh air fan and fresh air fan system provided by the embodiment of the present application are provided with an air valve 10 between the fresh air channel 1a and the exhaust channel 1b and near the exhaust inlet 14, and the evaporator 3 is provided in the fresh air channel 1a and adjacent to the air valve 10, and a water receiving pan assembly 4 is provided below the evaporator 3, and the water receiving pan assembly 4 is connected with the evaporator 3 through a connecting pipe assembly 43; 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 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 a water pump, and when the unit is in the heating condition, the exhaust fan 22 and the air valve 10 are opened to connect the fresh air outlet 13 with the exhaust channel 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 channel 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, and the water receiving pan assembly 4 is prevented from causing pollution to the fresh air entering the room.

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.

As shown in FIG2 , 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 valve 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 passage 1b, and the fresh air self-cleaning mode is turned on; 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 passage 1b, and the normal working mode is turned on.

In another example, the baffle 101 is slidably connected to the partition 15 through 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 passage 1b, and the fresh air self-cleaning mode is turned on; 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 passage 1b, and the normal working mode is turned on.

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, the connecting pipe assembly 43 includes a first pipeline 431, a second pipeline 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 pipeline 431, and the connecting pipe 430 is connected to the gas collecting pipe through the second pipeline 432.

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 through the first pipe 431 and the second pipe 432, and the connecting pipe 430 is arranged between the bottom plate 41 and the cover 42, the water receiving pan assembly 4 can keep a synchronous high temperature or low temperature with the evaporator 3, thereby achieving the cleaning work such as frosting and defrosting of the water receiving pan assembly 4.

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.

As shown in Fig. 4 and Fig. 5, the bottom wall 411 of the chassis 41 is provided with an elongated groove 413, and the connecting pipe 430 is embedded in the elongated groove 413. The low temperature 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 body 42 is an integrally formed structure, and the cover body 42 covers the bottom wall 411 of the chassis 41, and can seal the water, so that the water receiving tray assembly 4 has a receiving cavity for accommodating the evaporator 3, and the condensed water on the surface of the evaporator 3 can flow into the receiving cavity to prevent the condensed water from overflowing. Since the side wall 412 is higher than the position of the cover body 42 and is 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.

Furthermore, there are multiple long strip grooves 413, and the multiple long strip grooves 413 are arranged in parallel on the bottom wall 411. The connecting pipe 430 includes multiple branch pipes 431 that are interconnected, and the multiple branch pipes 431 are respectively embedded in the corresponding long strip grooves 413. The multiple branch pipes 431 are evenly distributed in the multiple long strip grooves 413 of the bottom plate 41, so that the water receiving tray assembly 4 can be evenly heated as a whole, ensuring that the water receiving tray assembly 4 is frosted or defrosted at the same time, and improving the self-cleaning efficiency.

In some embodiments, the housing 1 is divided into a first layer space 1c and a second layer space 1d from bottom to top by a partition 16, the fresh air fan 21 is arranged in the second layer space 1d, and the exhaust air fan 22 is arranged in the first layer space 1c. The fresh air fan 21 and the exhaust air fan 22 are each independently driven by a motor, so that they can be controlled separately. The fresh air fan 21 and the exhaust air fan 22 are arranged in layers in the vertical direction, and the height space of the housing 1 can be fully utilized to design the air duct, so as to save the space in the housing 1 as much as possible, reduce the overall volume of the ceiling fresh air fan, and achieve the purpose of reducing resistance at the same time.

In some embodiments, the ceiling fresh air fan further includes a full heat exchange core 6, which is disposed in the housing 1 and close to the first side, and the fresh air channel 1a and the exhaust air channel 1b respectively flow through the full heat exchange core 6. The full heat exchange core 6 is disposed in the housing 1 and close to the first side, and the fresh air fan 21 and the exhaust air fan 22 are disposed close to the second side of the housing, so that the structure of the ceiling fresh air fan can be more compact and the overall volume can be smaller.

In some embodiments, the first end upper portion of the full heat exchange core 6 forms a fresh air inlet surface 61, the first end lower portion of the full heat exchange core 6 forms an exhaust air outlet surface 62, the second end upper portion of the full heat exchange core 6 forms an exhaust air inlet surface 63, the second end lower portion of the full 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 channel 1a, the exhaust air inlet 14 is connected to the exhaust air inlet surface 63, and the exhaust air outlet surface 62 is connected to the exhaust channel 1b. In this way, the volume of the full heat exchange core 6 can be reduced, thereby making the structure of the ceiling fresh air fan more compact and the overall volume smaller.

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, and the two corners of the quadrangular prism-shaped heat exchange core 6 are connected to the shell 1.

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.

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 is 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 is 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 is 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.

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

In normal working mode, as shown by the arrow direction C in Figure 1, outdoor air enters the fresh air channel of the shell 1 through the fresh air inlet 11, and is delivered into the room 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; as shown by the arrow direction B in Figure 1, indoor air enters the exhaust channel of the shell 1 through the exhaust inlet 14, and is discharged to the outside through the secondary filter 72, the full heat exchange core 6, the exhaust fan 22, and the exhaust outlet 12; the two airflows complete the exchange of temperature and humidity when they intersect at the full heat exchange core 6.

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 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, as shown in the direction of arrow A in Figure 1, the exhaust fan 22 and the air valve 10 are turned on to connect the fresh air outlet 13 with the exhaust channel 1b, and 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, so that the high-humidity gas generated in 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 to the outside.

In addition, the ceiling fresh air blower also includes an electrical box assembly 8, which is arranged outside the housing 1 corresponding to the fan assembly 2 and is electrically connected to the fan assembly 2 through a cable. In addition, a plurality of lifting ears are also arranged on the edge of the housing 1 to facilitate the fresh air blower to be lifted to the roof or wall.

As shown in FIG6 , the embodiment of the present application provides a control method for the ceiling fresh air blower as described above, comprising:

Step S1: adjusting the operation mode of the ceiling fresh air fan to the fresh air self-cleaning mode;

Step S2: operating the fresh air fan 21 at a minimum air volume, and controlling the unit to operate for a first period of time under the refrigeration condition, 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;

Step S3: Control the unit to operate for a second time period under the heating condition, and heat the water tray assembly 4 and the evaporator 3 by means of a high-temperature refrigerant to defrost the frost into water;

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 with the exhaust passage 1b, and the fresh air flow at the fresh air outlet 13 flows in the reverse direction through the evaporator 3 and then enters the exhaust passage 1b, so as to discharge the high-humidity gas generated during the defrosting process outdoors;

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

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

The unit is controlled to continue to operate for a third time under the heating condition so that the surface of the water tray assembly 4 and the surface of the evaporator 3 are completely dried by the high-temperature gas. The first time, the second time and the third time can be preset through experiments and are not limited here.

The control method of the ceiling fresh air fan provided in the embodiment of the present application is provided by setting an air valve 10 between the fresh air channel 1a and the exhaust channel 1b and near the exhaust inlet 14, and setting the evaporator 3 in the fresh air channel 1a and adjacent to the air valve 10, and at the same time setting 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 unit is controlled to switch 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 pan assembly 4 are frosted and defrosted into water, and discharged to the outside through a water pump, and when the unit is in the heating condition, the exhaust fan 22 and the air valve 10 are opened to connect the fresh air outlet 13 with the exhaust channel 1b, and the fresh air airflow 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 is discharged to the outside, so that the water receiving pan assembly 4 can be sterilized, disinfected and cleaned, and the water receiving pan assembly 4 is prevented from causing pollution to the fresh air entering the room.

It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., 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 shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

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 it. 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims (11)

1. A ceiling fresh air fan, connected to an outdoor unit through a pipeline, the outdoor unit comprising a compressor and a condenser, characterized in that the fresh air fan 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 air outlet are in communication with the exhaust air channel; An air valve is arranged between the fresh air passage and the exhaust air passage and close to the exhaust air inlet, and is used to control the connection and isolation between the fresh air outlet and the exhaust air passage; A fan assembly, comprising a fresh air fan arranged in the fresh air passage and an exhaust air fan arranged in the exhaust air passage; an evaporator, connected to the compressor through a refrigerant pipeline, the evaporator being arranged in the fresh air channel and adjacent to the air valve; A water receiving tray assembly is located below the evaporator and is connected to the evaporator through a connecting pipe assembly, and the water receiving tray assembly is 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 pan assembly frosts and defrosts into water, and is 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 flow at the fresh air outlet flows in the opposite direction through the evaporator and then enters the exhaust channel, so as to discharge the high-humidity gas generated during the defrosting process to the outside. 2. The ceiling fresh air fan according to claim 1, characterized in that a partition is provided in the housing to separate the fresh air channel from the exhaust air 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 connection 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 through 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 comprises an air 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 fan according to claim 4 is characterized in that the chassis includes a bottom wall and side walls that form an accommodating cavity, the bottom wall is provided with a long strip groove, the connecting pipe is embedded in the long strip groove, and the side wall is connected to the drain pipe at a position higher than the cover body. 6. The ceiling fresh air fan according to claim 5 is characterized in that there are multiple elongated grooves, and the multiple elongated grooves are arranged in parallel on the bottom wall, and 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 fan according to claim 2 is characterized in that the shell is divided into a first space and a second space from bottom to top by the partition, 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 fan according to claim 1 is 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 fan according to claim 8 is 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 outlet surface is connected to the exhaust channel. 10. The ceiling fresh air fan according to claim 9 is 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 surface of the full heat exchange core, the secondary filter is located on the exhaust air inlet surface of the full heat exchange core, and the tertiary filter is located upstream of the evaporator. 11. A new air blower system, characterized by comprising: 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.