CN118189283A - Unidirectional flow fresh air conditioner and control method thereof - Google Patents

Abstract

The invention provides a unidirectional flow fresh air conditioner which is provided with an outdoor unit, wherein a first chamber is arranged in the outdoor unit, and a compressor is arranged in the first chamber; the fresh air conditioner further comprises: a ventilation duct having a first end positioned within the first chamber and a second end positioned within the chamber; the fan can rotate forward so that outdoor air sequentially passes through the first cavity and the ventilating duct to enter the room, so that the technical problem that condensation can be generated on the indoor unit or the fresh air fan when the indoor and outdoor temperature difference is large in the prior art is solved.

Description

Unidirectional flow fresh air conditioner and control method thereof

Technical Field

The invention belongs to the technical field of air conditioners, and particularly relates to a unidirectional flow fresh air conditioner and a control method thereof.

Background

The existing air conditioner unidirectional flow fresh air system is used for refrigerating and heating, outdoor ambient air is introduced into a room through a fresh air pipeline, indoor dirty air is discharged through doors and windows, and the fresh air system has two problems: firstly, after a refrigerating mode starts fresh air, when the indoor and outdoor temperature difference is large, a serious condensation phenomenon exists at the indoor unit; secondly, after the fresh air is started in the heating mode, the influence of the fresh air on the indoor side load is large under the condition of low outdoor environment temperature, and a serious condensation phenomenon exists on the fresh air fan (or the indoor unit).

In order to solve the problems, the invention patent of the prior art (publication number CN 115930358A) discloses a fresh air conditioner control method, a device, a fresh air conditioner, a system and a storage medium, wherein the patent prevents the fresh air conditioner from condensation by timely adjusting the air quantity of the fresh air blower and/or adjusting the set temperature of the air conditioner, so that a unit can operate more reliably; the scheme of the patent does not improve a specific solid structure, when the indoor and outdoor temperature difference is large, in order to avoid condensation, the air quantity needs to be reduced, and even the mode of stopping inputting fresh air is needed to avoid the condensation at the indoor unit or the fresh air fan; and is unfavorable for the renewal of indoor air.

When fresh air is conveyed indoors, how to effectively avoid condensation on a fresh air fan (or an indoor unit) is a technical problem which needs to be solved at present.

Disclosure of Invention

Therefore, the invention provides a unidirectional flow fresh air conditioner and a control method thereof, which can solve the technical problem that condensation can be generated on an indoor unit or a fresh air machine when the indoor and outdoor temperature difference is large in the prior art.

In a first aspect, the invention provides a unidirectional flow fresh air conditioner, which is provided with an outdoor unit, wherein a first chamber is arranged in the outdoor unit, and a compressor is arranged in the first chamber; the fresh air conditioner further comprises:

A ventilation duct having a first end positioned within the first chamber and a second end positioned within the chamber;

The fan can rotate forward to enable outdoor air to enter the room through the first chamber and the ventilation pipeline in sequence.

In some embodiments, the blower is capable of counter-rotating to expel indoor air out of the room through the ventilation duct and the first chamber in sequence. .

In some embodiments, a vent hole is provided on the outdoor unit, the vent hole communicates the outdoor with the first chamber, and the fan is disposed at the vent hole.

In some embodiments, the compressor is located on a straight line between the vent hole and the first end of the vent conduit.

In some embodiments, the vertical casing of the outdoor unit includes a first sidewall, a second sidewall, a third sidewall, and a fourth sidewall in this order, the first sidewall being opposite to the third sidewall, the second sidewall being opposite to the fourth sidewall;

a partition board is arranged in the outdoor unit, a first end of the partition board is connected with the first side wall, and a second end of the partition board is connected with the third side wall; adjacent first and second spaces are formed between the partition plate and the fourth side wall; the first space is adjacent to the third sidewall, and the second space is adjacent to the first sidewall;

The compressor is located in the second space, and the first end of the ventilation pipeline is communicated with the first space and is opposite to the partition plate.

In some embodiments, a perforated sound attenuation panel is disposed between the first and second spaces.

In some embodiments, the porous sound attenuation plate is provided with drainage grooves extending in the up-down direction.

In some embodiments, a water pan is disposed below the porous sound attenuation panel.

In a second aspect, the invention also provides a control method of the fresh air conditioner, which is used for the unidirectional flow fresh air conditioner, and comprises a fresh air refrigerating method in a refrigerating mode and a fresh air heating method in a heating mode;

The fresh air refrigerating method comprises the following steps: the fresh air conditioner is adjusted to a refrigeration mode, and the fan reversely rotates to enable air to be discharged from the room into the first cavity through the ventilation pipeline;

The fresh air heating method comprises the following steps: the fresh air conditioner is adjusted to be in a heating mode, and the fan rotates positively to enable outdoor air to sequentially pass through the first chamber and the ventilation pipeline to enter a room.

In some embodiments, when a vent is provided, the fresh air chilling method further comprises: the opening degree of the vent hole becomes larger as the outdoor temperature increases; the fresh air heating method further comprises the following steps: the opening degree of the vent hole becomes larger as the operation frequency of the compressor increases.

In some embodiments, when a vent is provided, the fresh air chilling method further comprises: acquiring outdoor temperature T in real time, and adjusting the vent hole to be a first opening degree when T is less than 20 ℃, wherein the fan works in a first gear; when the temperature T is more than or equal to 20 ℃ and less than or equal to 30 ℃, the vent hole is adjusted to be a second opening degree, and the fan works in a second gear; when the temperature T is more than 30 ℃ and less than or equal to 40 ℃, the vent hole is adjusted to be at a third opening degree, and the fan works in a second gear; when T is more than 40 ℃, the vent hole is opened to the maximum, and the fan works in a third gear; the first opening is less than the second opening and less than the third opening; the rotational speed of the first gear is less than the rotational speed of the second gear is less than the rotational speed of the third gear.

In some embodiments, when a vent is provided, the fresh air heating method further comprises: acquiring the running frequency f of the compressor in real time, and adjusting the vent hole to be a fourth opening degree when f is smaller than 30Hz, wherein the fan works in a fourth gear; when f is more than or equal to 30Hz and less than or equal to 50Hz, the vent hole is adjusted to be at a fifth opening degree, and the fan works at a fifth gear; when f is more than 50Hz and less than or equal to 80Hz, the vent hole is adjusted to be at a sixth opening degree, and the fan works in a fifth gear; when T is more than 80Hz, the vent hole is opened to the maximum, and the fan works in a sixth gear; the fourth opening degree is less than the fifth opening degree and less than the sixth opening degree; the rotation speed of the fourth gear is less than the rotation speed of the fifth gear and less than the rotation speed of the sixth gear.

The invention is arranged in the first cavity by leading the first end of the ventilating duct to the outside; during refrigeration, indoor air is discharged through the ventilating duct, outdoor air enters the room through the door and window gaps, condensation on the indoor unit and the fresh air machine is avoided, low-temperature air discharged from the room can cool the compressor and the like in the first cavity, and stable operation of the compressor is ensured; when heating, outdoor air gets into indoor through air pipe, and indoor air passes through door and window gap and discharges, and heat exchange takes place with compressor etc. when outdoor air passes through first cavity, has both avoided outdoor air to get into indoor time and indoor air difference in temperature great, has avoided the production of condensation, and outdoor air can cool down the compressor again with the compressor contact, has guaranteed the steady operation of compressor.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. The drawings in the following description are merely exemplary and other implementations drawings may be derived from the drawings provided without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram illustrating a relationship among an outdoor unit, an indoor unit, and a ventilation duct according to an embodiment of the present invention;

Fig. 2 is a schematic top view illustrating an outdoor unit, an indoor unit and a ventilation duct according to an embodiment of the present invention;

fig. 3 is a schematic top view of an embodiment of the present invention with a top cover plate removed between an outdoor unit, an indoor unit and a ventilation duct;

FIG. 4 is a simplified schematic top view of an outdoor unit with a cover removed according to an embodiment of the present invention;

FIG. 5 is an exploded view of a fan and ventilation duct of an embodiment of the present invention;

FIG. 6 is a schematic diagram of a vent fully closed in accordance with an embodiment of the invention;

FIG. 7 is a schematic diagram of an embodiment of the present invention with one quarter of the vent open;

FIG. 8 is a schematic diagram of an embodiment of the present invention with one-half vent open;

FIG. 9 is a schematic diagram of a vent of an embodiment of the invention with three quarters open;

FIG. 10 is a schematic diagram of an embodiment of the present invention with the vent fully open;

FIG. 11 is a control logic diagram of an air conditioner in a cooling mode according to an embodiment of the present invention;

Fig. 12 is a control logic diagram of an air conditioner in a heating mode according to an embodiment of the present invention.

The reference numerals are:

1. a first chamber; 2. a second chamber; 301. an outdoor unit; 302. an indoor unit; 4. a compressor; 401. an outdoor heat exchanger; 5. a ventilation duct; 501. a blower; 6. a porous sound deadening plate; 601. a vent hole; 701. a first sidewall; 702. a second sidewall; 703. a third sidewall; 704. a fourth sidewall; 8. a partition plate; 801. a first plate; 802. a second plate; 803. a third plate; 901. a first interval; 902. a second interval; 903. and a third interval.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.

The invention provides a unidirectional flow fresh air conditioner and a control method thereof, which can solve the technical problem that condensation can be generated on an indoor unit or a fresh air fan when the indoor and outdoor temperature difference is large in the prior art.

Referring to fig. 1-10, the unidirectional flow fresh air conditioner provided by the invention is provided with an outdoor unit 301, wherein a first chamber 1 is arranged in the outdoor unit 301, and a compressor 4 is arranged in the first chamber 1; the fresh air conditioner further comprises:

a ventilation duct 5 having a first end communicating with the first chamber 1, and a second end of the ventilation duct 5 communicating with the room;

The fan 501 can rotate forward to allow outdoor air to enter the room through the first chamber 1 and the ventilation duct 5 in sequence. As shown in fig. 3, the outdoor unit 301 is provided with two chambers, the first chamber 1 is provided with a compressor 4, and the second chamber 2 is provided with an outdoor heat exchanger 401 and an outdoor fan; the first chamber 1 and the second chamber 2 are separated by a partition 8 below. The unidirectional flow fresh air conditioner is characterized in that the air conditioner is provided with only one air pipeline for indoor and outdoor circulation, when the air channel (namely the ventilating pipeline 5 in the application) is used for supplementing fresh air to the indoor, indoor polluted air is discharged outwards through gaps such as doors and windows, and when the air channel is used for discharging the polluted air to the outdoor, the fresh air enters the indoor through the gaps of the doors and windows. The two-way fresh air conditioner is characterized in that the air conditioner is provided with two air channels, one is used for supplementing fresh air to the indoor space, and the other is used for discharging sewage to the outdoor space.

The second end of the ventilation duct 5 is located on the indoor unit 302 or is separately located on the indoor wall surface.

Through making air pipe 5 intercommunication indoor and second cavity 2, under the heating mode, outdoor air temperature is lower, and fan 501 forward rotation makes outdoor air get into air pipe 5 behind first cavity 1, reentrant room, and the air takes place heat exchange with compressor 4 (compressor 4 work produces heat) and intensifies when passing through first cavity 1 for get into indoor fresh air temperature is higher, avoids indoor outer temperature difference great to lead to appearing the condensation phenomenon in indoor set 302 department or new fan 501 department. When fresh air is conveyed into the room through the ventilating duct 5, part of the original air in the room is discharged outwards from gaps such as doors and windows. Because the outdoor air temperature is lower, the lower outdoor air enters the first chamber 1 to exchange heat with the compressor 4 and other devices, and meanwhile, the compressor 4, the main board and the electric control element are cooled. The outdoor air is introduced into the first chamber 1 through a ventilation hole 601 provided in the outdoor unit, or through an assembly gap or a space for heat dissipation formed in the casing of the outdoor unit.

The "reverse rotation" and "forward rotation" are relative terms, and the fan 501 rotates in only two directions, and when one direction is reverse rotation, the other direction is forward rotation. The fan 501 comprises a motor and axial flow fan blades.

Preferably, the blower 501 is capable of rotating in a reverse direction to discharge indoor air to the outside through the ventilating duct 5 and the first chamber 1 in sequence.

In the refrigeration mode, the fan 501 rotates reversely to enable indoor air to be discharged into the first chamber 1 outwards through the ventilating duct 5, outdoor fresh air enters the room through gaps such as doors and windows, on one hand, condensation generated on the indoor unit 302 or the fresh air fan 501 is avoided (if the fresh air enters the room from the gaps of the doors and windows and is generated at the gaps of the doors and the windows, adverse effects on the indoor unit 302 and the fresh air fan 501 cannot be generated), on the other hand, air with lower indoor temperature enters the first chamber 1 through the ventilating duct 5 to cool the compressor 4, the main control board, the circuit and other components needing cooling, the phenomenon that the indoor refrigeration effect is poor due to the fact that the upper limit of the operation frequency of the compressor 4 is reduced is avoided, and the service life of the main control board, the pipeline and the like is also avoided.

Preferably, as shown in fig. 3, the fan 501 is disposed at a second end of the ventilation duct 5.

Through making fan 501 set up the second end at air pipe 5, can accelerate the indoor speed of new trend entering, be favorable to improving the circulation rate of indoor air, improve indoor user's experience.

Preferably, the outdoor unit 301 is provided with a vent 601, the vent 601 communicates the outdoor space with the first chamber 1, and the fan 501 is disposed at the vent 601.

The special ventilation holes 601 are formed, outdoor air can enter the first chamber 1 faster, so that the flow of fresh air is guaranteed, and the fan 501 is arranged at the ventilation holes 601, so that the influence of noise generated by rotation of the fan 501 on the indoor space can be effectively reduced.

Preferably, the compressor is located in a straight line between the ventilation hole 601 and the first end of the ventilation duct 5.

By having the compressor in a straight line between the vent 601 and the first end of the ventilation duct 5, the air entering the first chamber 1 through the vent 601 or the air entering the first chamber 1 through the ventilation duct 5 is able to flow over the surface of the compressor 4 to the greatest extent possible, improving the efficiency of the heat exchange of the air with the surface of the compressor 4.

Preferably, the ventilation hole 601 may be provided at the bottom wall of the outdoor unit when there is a sufficient space below the bottom wall of the outdoor unit. The bottom wall refers to a wall surface facing the ground after the outdoor unit is normally installed. By arranging the ventilation holes 601 on the bottom wall of the outdoor unit 301, on one hand, impurities such as outdoor dust and the like are effectively reduced from entering the first chamber 1 under the action of gravity, the quality of the environment in the first chamber 1 is ensured, and a filtering device can be arranged at the ventilation holes 601, so that the entry of the outdoor dust or insects and the like into the first chamber 1 is further reduced; on the other hand, when the motor of compressor 4 is vertical setting, the vibration that the motor work produced is mainly the vibration of horizontal direction, sets up ventilation hole 601 on the diapire, can effectively reduce the discharge of the vibration noise follow ventilation hole 601 of compressor 4, is favorable to improving user experience.

Preferably, as shown in fig. 3 and 4, the vertical casing of the outdoor unit 301 includes a first sidewall 701, a second sidewall 702, a third sidewall 703, and a fourth sidewall 704 in order, where the first sidewall 701 is opposite to the third sidewall 703, and the second sidewall 702 is opposite to the fourth sidewall 704;

A partition plate 8 is disposed in the outdoor unit 301, a first end of the partition plate 8 is connected to the first side wall 701, and a second end of the partition plate 8 is connected to the third side wall 703; a first space 901 and a second space 902 are formed between the partition 8 and the fourth side wall 704; the first space 901 is adjacent to the third sidewall 703, and the second space 902 is adjacent to the first sidewall 701; the compressor 4 is located in the second space 902, and the first end of the ventilation duct 5 communicates with the first space 901 and is opposite to the partition 8.

By arranging the first end of the ventilation duct 5 in the first space 901 opposite to the partition 8, it is avoided that the first end is directly opposite to the compressor 4, and the noise generated by the compressor 4 is prevented from directly entering the ventilation duct 5 and entering the room through the ventilation duct 5. The pollution of noise generated by the compressor 4 to the room due to the arrangement of the ventilating duct 5 communicating the first chamber 1 and the room is effectively reduced.

Specifically, the partition 8 is composed of a first plate 801, a second plate 802 and a third plate 803 which are sequentially connected, and the partition 8 is zigzag; the first plate 801 and the third plate 803 each extend from the first side wall 701 to the third side wall 703, and the second plate 802 extends from the second side wall 702 to the fourth side wall 704;

The third plate 803 is connected to the third side wall 703, a first space 901 is formed between the third plate 803 and the fourth side wall 704, and a second space 902 is formed between the first plate 801 and the fourth side wall 704; the first chamber 1 comprises a first space 901 and a second space 902. The partition 8 partitions the inner space of the outdoor unit 301 into a first chamber 1 and a second chamber 2, and an outdoor heat exchanger 401 and an outdoor fan are provided in the second chamber 2. A third space 903 is formed between the second plate 802 and the third side wall 703, and the third space 903 is used for accommodating the outdoor heat exchanger 401, so that the heat exchange area between the outdoor heat exchanger 401 and the outdoor air is increased. A sound insulation material may be provided in the ventilation duct 5 for preventing noise generated by vibration of the compressor 4 from being transferred into the room through the ventilation duct 5; the inlet and outlet of the first end of the ventilation pipeline 5 in the first chamber 1 is opposite to the direction of the third plate 803 (outdoor heat exchanger) and is used for preventing vibration waves generated by the compressor 4 from being transmitted from the ventilation pipeline 5 in the forward direction, and preventing condensation generated by the outlet of the fresh air tail end in the refrigerating mode from being dripped to the compressor 4 and electrified components and parts, so that the electric safety and reliability are improved.

Preferably, as shown in fig. 4, a porous muffler plate 6 is disposed between the first space 901 and the second space 902.

The porous muffler plate 6 is provided with a plurality of micro through holes, and the micro through holes are communicated with the first space 901 and the second space 902, so that the micro through holes can enable gas to circulate, and have a noise elimination effect on sound.

Through setting up porous acoustical panel 6, guaranteed on the one hand that the air can circulate between second interval 902 and ventilation duct 5, on the other hand still reduced the transmission that the noise transmitted ventilation duct 5 from second interval 902, improved user's experience.

When the indoor refrigeration is carried out, and when the indoor air temperature is lower, condensation is easily generated when the lower-temperature air discharged from the indoor contacts with the compressor 4 with higher temperature and the main control board, and the condensation can have adverse effects on the main board and the like; through the porous silencer plate 6, since the compressor 4 is arranged in the second interval 902, the first end of the ventilation pipeline 5 is positioned in the first interval 901, and one side of the porous silencer plate 6 is higher towards the second interval 902 and the other side is lower towards the first interval 901 as the porous silencer plate 6 between the first interval 901 and the second interval 902, so that condensation is generated on the porous silencer plate 6, the occurrence of condensation on the surfaces of the compressor 4, a main board and the like is avoided, and the working stability of the fresh air conditioner is improved.

Preferably, the perforated muffler plate 6 is provided with a drain groove extending in the vertical direction.

The condensation generated on the porous silencing plate 6 flows downwards along the drainage groove in time under the action of gravity, so that the phenomenon that the condensation stays on the porous silencing plate 6 for too long, and flies into the second interval 902 under the action of wind and adheres to the main board and the circuit during refrigeration is avoided, and the stable operation of the main board, the circuit and the like is further ensured.

Preferably, a water receiving tray is arranged below the porous silencing plate 6.

By arranging the water receiving tray below the porous silencing plate 6 to receive the condensation flowing down from the porous silencing plate 6, the phenomena of corrosion, circuit short circuit and the like caused by turbulent flow of the condensation in the outdoor unit 301 are avoided.

A flow guide pipe may be provided to discharge the condensation (condensed water) in the water pan out of the outdoor unit 301.

The invention also provides a control method of the fresh air conditioner, which is used for the unidirectional flow fresh air conditioner, and comprises a fresh air refrigerating method in a refrigerating mode and a fresh air heating method in a heating mode;

The fresh air refrigerating method comprises the following steps: the fresh air conditioner is adjusted to a refrigeration mode, and the fan 501 rotates reversely to discharge air from the room into the first chamber 1 through the ventilation pipeline 5;

the fresh air heating method comprises the following steps: the fresh air conditioner is adjusted to a heating mode, and the fan 501 rotates forward to enable outdoor air to sequentially pass through the first chamber 1 and the ventilation pipeline 5 to enter a room.

The fresh air refrigerating method comprises (as shown in fig. 11): the fresh air conditioner is adjusted to be in a refrigerating mode, the indoor temperature and the outdoor temperature are high, the indoor unit 302 refrigerates the indoor space, the air is discharged into the first chamber 1 from the indoor space through the ventilating duct 5 by reversely rotating the fan 501, a certain negative pressure is further formed in the indoor space, and the outdoor fresh air enters the indoor space from a gap of a door and a window by the negative pressure, so that the purpose of compensating fresh air to the indoor space is achieved; because the indoor environment is a refrigeration environment, the temperature of air discharged from the indoor environment into the first chamber 1 is lower than that of outdoor air, and the air with lower temperature enters the first chamber 1 to cool the compressor 4, the main board and the like, so that the compressor 4 and the main board can work stably; because air enters the room from the door and window and the like, even if condensation occurs, the condensation only occurs at the gap of the door and window, and the condensation does not adversely affect the indoor unit 302 and fresh air.

The fresh air heating method comprises (as shown in fig. 12): the fresh air conditioner is adjusted to be a heating mode, indoor and outdoor temperature is lower, temperature rising is carried out indoors, the fan 501 positively rotates to enable outdoor air to sequentially pass through the first chamber 1 and the ventilating duct 5 to enter indoors, heat exchange is carried out between air and the compressor 4 when the compressor 4 is operated and heated, so that the compressor 4 is cooled, the situation that the heating performance is reduced due to overhigh frequency of the compressor 4 is avoided, on the other hand, air enters indoors after being heated by the compressor 4, the temperature of the air entering indoors is increased, the temperature difference between the air entering indoors and original indoor air is reduced, the possibility of condensation due to temperature difference is effectively reduced, and the user experience is improved.

Preferably, when the ventilation hole 601 is provided, the fresh air cooling method further includes: the opening degree of the ventilation hole 601 becomes larger as the outdoor temperature increases; the fresh air heating method further comprises the following steps: the opening degree of the ventilation hole 601 becomes larger as the operation frequency of the compressor increases. During refrigeration, the higher the outdoor temperature is, the higher the working power of the compressor 4 is required to improve the indoor refrigeration efficiency, the higher the power of the compressor 4 is, the more heat is generated by the compressor 4, and the opening of the ventilation hole 601 is increased to be beneficial to increasing the air with lower indoor temperature to enter the first chamber 1 for cooling the compressor. Similarly, when heating, the higher the frequency of the compressor 4 is, the higher the heat generated by the compressor 4 is, and increasing the opening of the ventilation hole 601 is beneficial to increasing the outdoor air to enter the first chamber 1 to cool the compressor; thus, the stability of the operation of the compressor is improved.

Preferably, when the ventilation hole 601 is provided, the fresh air cooling method further includes: acquiring outdoor temperature T in real time, when T is less than 20 ℃, adjusting the ventilation hole 601 to be a first opening degree, and enabling the fan 501 to work in a first gear; when the temperature T is more than or equal to 20 ℃ and less than or equal to 30 ℃, the vent 601 is adjusted to be a second opening degree, and the fan 501 works in a second gear; when the temperature T is more than 30 ℃ and less than or equal to 40 ℃, the vent 601 is adjusted to be at a third opening degree, and the fan 501 works in a second gear; when T > 40 ℃, the vent 601 is opened to the maximum, and the fan 501 operates in a third gear; the first opening is less than the second opening and less than the third opening; the rotational speed of the first gear is less than the rotational speed of the second gear is less than the rotational speed of the third gear.

The "fresh air fan" in fig. 11 and 12 is not only the "fan 501" in the claims and description of the present application. The first gear rotational speed and the fourth gear rotational speed in the present application are both the low wind gears in fig. 11 and 12, the second gear rotational speed and the fifth gear rotational speed are both the medium wind gears in fig. 11 and 12, and the third gear rotational speed and the sixth gear rotational speed are both the high wind gears in fig. 11 and 12. When fresh air is refrigerated (fresh air is supplemented in a refrigerating mode), outdoor temperature T is obtained in real time, when T is lower than 20 ℃, the required refrigerating capacity is lower, the power of the compressor 4 is lower, at the moment, less heat is generated by the compressor 4, the vent hole 601 is adjusted to be a first opening, the first opening can be set to be approximately 1/4 of the opening, as shown in fig. 7, the fan 501 works at the rotating speed of a first gear, less indoor air (the air conditioner starts refrigerating, the indoor air temperature is lower than the outdoor air temperature, and the temperature of the air entering the first chamber 1 from the indoor through the ventilating duct 5 is lower than that of the outdoor air) enters the first chamber 1 to cool the compressor 4, the main control board, the circuit and the like, so that the compressor 4 can be ensured to work at a proper temperature, and certain negative pressure is formed in the indoor space to enable the outdoor air to enter the indoor through a door and window gap; when the temperature T is more than or equal to 20 ℃ and less than or equal to 30 ℃, the outdoor temperature is higher, the vent hole 601 is adjusted to be at a second opening degree, the second opening degree can be set to be approximately 1/2 of the opening degree, as shown in fig. 8, the fan 501 works at the rotating speed of a second gear, more indoor air enters the first chamber 1 to cool the compressor 4, and meanwhile, more outdoor air enters the room through the gaps of the doors and windows, although the amount of the outdoor air entering the room is increased, the refrigerating efficiency of the air conditioner is also increased, and after comprehensive consideration, the indoor temperature can still be kept within a preset range; when the temperature is higher and is more than 30 ℃ and less than or equal to 40 ℃, the vent hole 601 is adjusted to be at a third opening degree, the third opening degree can be set to be approximately 3/4 of the opening degree, as shown in fig. 9, the fan 501 works at the rotating speed of the second gear, although the rotating speed of the fan 501 does not further rise, the opening degree of the vent hole 601 is larger, more indoor air can still enter the first chamber 1 through the vent pipe 5 to cool the compressor 4, and unnecessary noise caused by the overhigh rotating speed of the fan 501 is avoided; when T is more than 40 ℃, the ventilation hole 601 is opened to the maximum, as shown in FIG. 10, the fan 501 works at the rotation speed of the third gear, the rotation speed of the third gear can be set to be the maximum rotation speed of the fan 501, T is more than 40 ℃, the outdoor temperature is too high, in order to avoid the incapability of normal operation of the compressor 4, the main control board and the circuit, at the moment, the ventilation hole 601 is opened to the maximum, the rotation speed of the fan 501 is the maximum, and the air with lower indoor temperature enters the first chamber 1 through the ventilation pipeline 5 to cool the compressor 4, the main control board and the circuit as much as possible, so that the fan can normally operate, and finally the indoor temperature is ensured to be constant; when the fresh air supply is stopped, the ventilation hole 601 may be completely closed as shown in fig. 6.

The vent 601 is provided with a rotatable valve, and the air inlet area of the vent 601 can be adjusted by rotating the valve.

Preferably, as shown in fig. 12, when the ventilation hole 601 is provided, the fresh air heating method further includes: acquiring the running frequency f of the compressor 4 in real time, and when f is smaller than 30Hz, adjusting the vent 601 to a fourth opening degree, wherein the fan 501 works in a fourth gear; when f is more than or equal to 30Hz and less than or equal to 50Hz, the vent 601 is adjusted to be at a fifth opening degree, and the fan 501 works at a fifth gear; when f is more than 50Hz and less than or equal to 80Hz, the vent 601 is adjusted to be at a sixth opening degree, and the fan 501 works at a fifth gear; when T > 80Hz, the vent 601 is opened to the maximum, and the fan 501 operates in a sixth gear; the fourth opening degree is less than the fifth opening degree and less than the sixth opening degree; the rotation speed of the fourth gear is less than the rotation speed of the fifth gear and less than the rotation speed of the sixth gear.

When the fresh air is heated (the fresh air is supplemented in a heating mode), the fresh air heating method further comprises the following steps: acquiring the running frequency f of the compressor 4 in real time, when f is smaller than 30Hz, the compressor 4 has lower heating power, the indoor required heating amount is not large, the heat generated by the compressor 4 is not large, the vent hole 601 is adjusted to be at a fourth opening, the fourth opening can be set to be approximately 1/4, as shown in fig. 7, the fan 501 works at the rotating speed of a fourth gear, and less outdoor fresh air enters the first chamber 1 to exchange heat with the compressor 4, so that the temperature of the fresh air entering the indoor is not too low; when f is less than or equal to 30Hz and less than or equal to 50Hz, the indoor heat is increased, the working frequency of the compressor 4 is increased, the generated heat is also increased, the vent 601 can be adjusted to be about 1/2 of the fifth opening, as shown in fig. 8, the fan 501 works at the rotating speed of the fifth gear to increase the air inlet quantity, more outdoor fresh air exchanges heat with the compressor 4, and at the moment, the fresh air entering the room can still keep a certain temperature, so that the occurrence of condensation caused by the too low temperature of the air entering the room is avoided; when f is more than 50Hz and less than or equal to 80Hz, the working frequency of the compressor 4 is further increased, the heat generated by the compressor 4 is also more, the vent 601 can be adjusted to be a sixth opening, the sixth opening can be set to be approximately 3/4, as shown in fig. 9, the fan 501 works at the rotating speed of a fifth gear, at the moment, the rotating speed of the fan 501 does not need to be further increased, larger noise is avoided, more fresh air can still enter the first chamber 1 due to the enlarged air inlet area of the vent 601, heat exchange is still carried out between the fresh air and the compressor 4 in the first chamber 1, meanwhile, the compressor 4 is heated due to the fact that the upper limit operation frequency of the compressor 4 is greatly reduced due to the fact that the temperature is too high, the compressor 4 cannot effectively work, the temperature difference between the fresh air and the indoor temperature is still within a reasonable range, and the phenomenon of condensation is avoided; when T > 80Hz, the working frequency of the compressor 4 is higher, the generated heat is also more, in order to avoid the overhigh temperature of the compressor 4, the vent hole 601 is opened to the maximum at this time, as shown in fig. 10, the fan 501 works at the rotation speed of the sixth gear (the rotation speed of the sixth gear can be set as the maximum rotation speed of the fan 501), a large amount of outdoor low-temperature air enters the first chamber 1 to exchange heat with the compressor 4, the compressor 4 is cooled, and meanwhile, the air heated by the compressor 4 enters the room, at this time, the temperature difference between the fresh air and the room is still within a reasonable range, and the phenomenon of condensation is avoided; the more fresh air is not supplied to the room, the better the more the supplied fresh air is, the more energy is consumed to control the indoor temperature in order to ensure the stability of the indoor temperature, when T is more than 80Hz, the vent hole 601 is the largest, and the purpose of the fan 501 working at the sixth gear rotating speed (the maximum rotating speed) is mainly to cool the compressor 4, so that the overhigh temperature of the compressor 4 is avoided. When fresh air is not being sent, the vent 601 is closed as shown in fig. 6.

Those skilled in the art will readily appreciate that the advantageous features of the various aspects described above may be freely combined and stacked without conflict.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.

Claims (12)

1. A unidirectional flow fresh air conditioner is provided with an outdoor unit (301), wherein a first chamber (1) is arranged in the outdoor unit (301), and a compressor (4) is arranged in the first chamber (1); the fresh air conditioner is characterized by further comprising:

-a ventilation duct (5) with a first end communicating with the first chamber (1), a second end of the ventilation duct (5) opening into the chamber;

A fan (501) capable of rotating in a forward direction to cause outdoor air to enter the room through the first chamber (1) and the ventilation duct (5) in sequence.

2. The unidirectional flow fresh air conditioner according to claim 1, wherein the fan (501) can rotate reversely to discharge indoor air to the outside through the ventilating duct (5) and the first chamber (1) in sequence.

3. The unidirectional flow fresh air conditioner according to claim 1, wherein the outdoor unit (301) is provided with a vent hole (601), the vent hole (601) communicates the outdoor with the first chamber (1), and the fan (501) is disposed at the vent hole (601).

4. A unidirectional flow fresh air conditioner according to claim 3, characterized in that the compressor (4) is located on a straight line between the ventilation hole (601) and the first end of the ventilation duct.

5. The unidirectional flow fresh air conditioner of any one of claims 1 to 4, wherein the vertical casing of the outdoor unit (301) includes, in order, a first side wall (701), a second side wall (702), a third side wall (703), and a fourth side wall (704), the first side wall (701) being opposite to the third side wall (703), the second side wall (702) being opposite to the fourth side wall (704);

A partition board (8) is arranged in the outdoor unit (301), a first end of the partition board (8) is connected with the first side wall (701), and a second end of the partition board (8) is connected with the third side wall (703); a first space (901) and a second space (902) are formed between the partition plate (8) and the fourth side wall (704); -the first space (901) is adjacent to the third side wall (703), and the second space (902) is adjacent to the first side wall (701); the compressor (4) is located within the second compartment (902), and the first end of the ventilation duct (5) communicates with the first compartment (901) and is opposite the partition (8).

6. The unidirectional flow fresh air conditioner as claimed in claim 5, wherein a porous muffler plate (6) is provided between the first and second spaces (901, 902).

7. The unidirectional flow fresh air conditioner as claimed in claim 6, wherein the porous silencing plate (6) is provided with drainage grooves extending in the up-down direction.

8. The unidirectional flow fresh air conditioner as claimed in claim 6, wherein a water receiving tray is arranged below the porous silencing plate (6).

9. A control method of a fresh air conditioner, which is characterized by being used for the unidirectional flow fresh air conditioner according to any one of claims 2-8, wherein the control method comprises a fresh air refrigerating method in a refrigerating mode and a fresh air heating method in a heating mode;

the fresh air refrigerating method comprises the following steps: the fresh air conditioner is adjusted to a refrigerating mode, and the fan (501) rotates reversely to enable air to be discharged from the room into the first chamber (1) through the ventilation pipeline 5;

The fresh air heating method comprises the following steps: the fresh air conditioner is adjusted to be in a heating mode, and the fan (501) rotates positively to enable outdoor air to sequentially pass through the first chamber (1) and the ventilation pipeline (5) to enter a room.

10. The control method of a fresh air conditioner according to claim 9, wherein when a vent hole (601) is provided, the fresh air cooling method further comprises: the opening degree of the ventilation hole (601) becomes larger with the rise of the outdoor temperature; the fresh air heating method further comprises the following steps: the opening degree of the vent hole (601) becomes larger as the operation frequency of the compressor increases.

11. The control method of a fresh air conditioner according to claim 9, wherein when a vent hole (601) is provided, the fresh air cooling method further comprises: acquiring outdoor temperature T in real time, when T is less than 20 ℃, adjusting the ventilation hole (601) to be a first opening degree, and enabling the fan (501) to work in a first gear; when the temperature T is more than or equal to 20 ℃ and less than or equal to 30 ℃, the vent hole (601) is adjusted to be at a second opening degree, and the fan (501) works in a second gear; when the temperature T is more than 30 ℃ and less than or equal to 40 ℃, the vent hole (601) is adjusted to be at a third opening degree, and the fan (501) works in a second gear; when T is more than 40 ℃, the vent hole (601) is opened to the maximum, and the fan (501) works in a third gear; the first opening is less than the second opening and less than the third opening; the rotational speed of the first gear is less than the rotational speed of the second gear is less than the rotational speed of the third gear.

12. The control method of a fresh air conditioner according to claim 9, wherein when a vent hole (601) is provided, the fresh air heating method further comprises: acquiring the running frequency f of the compressor (4) in real time, and when f is smaller than 30Hz, adjusting the vent hole (601) to be a fourth opening degree, and enabling the fan (501) to work in a fourth gear; when f is more than or equal to 30Hz and less than or equal to 50Hz, the vent hole (601) is adjusted to be at a fifth opening degree, and the fan (501) works at a fifth gear; when f is more than 50Hz and less than or equal to 80Hz, the vent hole (601) is adjusted to be at a sixth opening degree, and the fan (501) works in a fifth gear; when T is more than 80Hz, the vent hole (601) is opened to the maximum, and the fan (501) works in a sixth gear; the fourth opening degree is less than the fifth opening degree and less than the sixth opening degree; the rotation speed of the fourth gear is less than the rotation speed of the fifth gear and less than the rotation speed of the sixth gear.