阅读说明：本技术 空调机组及空调机组的控制方法 (Air conditioning unit and control method thereof ) 是由 梁郁龙 张秋雨 鲍勇 于 2020-06-17 设计创作，主要内容包括：本申请提供了一种空调机组及空调机组的控制方法。该空调机组包括内机、新风管、排风管和化霜风管,新风管与内机相连,室外空气可通过新风管输送进入内机。排风管与内机相连,内机换热后的空气可通过排风管输送给室内。化霜风管连接在新风管和排风管之间,在空调机组化霜时,内机进行制冷,排风管输送冷气流,化霜风管将排风管输送的冷气流输送给新风管,通过新风管排出室外。本发明的技术方案,可以不影响室内用户舒适性,同时解决内机冷媒无法蒸发形成回液影响压缩机寿命问题,提高压缩机运行可靠性。(The application provides an air conditioning unit and a control method of the air conditioning unit. The air conditioning unit comprises an inner unit, a fresh air pipe, an exhaust pipe and a defrosting air pipe, wherein the fresh air pipe is connected with the inner unit, and outdoor air can be conveyed into the inner unit through the fresh air pipe. The exhaust pipe is connected with the indoor unit, and air after heat exchange of the indoor unit can be conveyed to the indoor unit through the exhaust pipe. The defrosting air pipe is connected between the fresh air pipe and the exhaust pipe, when the air conditioning unit defrosts, the inner unit refrigerates, the exhaust pipe conveys cold air flow, and the defrosting air pipe conveys the cold air flow conveyed by the exhaust pipe to the fresh air pipe and is discharged outdoors through the fresh air pipe. According to the technical scheme, the comfort of indoor users is not influenced, the problem that the service life of the compressor is influenced because liquid return formed by the refrigerant of the indoor unit cannot be evaporated is solved, and the operation reliability of the compressor is improved.)

1. An air conditioning assembly, comprising:

an inner machine (10);

the fresh air pipe (20) is connected with the internal machine (10), and outdoor air can be conveyed into the internal machine (10) through the fresh air pipe (20);

the exhaust pipe (30) is connected with the internal unit (10), and air after heat exchange of the internal unit (10) can be conveyed to the indoor through the exhaust pipe (30);

defrosting tuber pipe (40) are connected fresh air pipe (20) with between exhaust pipe (30) during air conditioning unit defrosts, indoor set (10) refrigerate, exhaust pipe (30) carry the cold air current, defrosting tuber pipe (40) will the cold air current that exhaust pipe (30) carried is carried and is given fresh air pipe (20), through fresh air pipe (20) discharge is outdoor.

2. The air conditioning unit according to claim 1, wherein an air valve device (41) is disposed on the defrosting air pipe (40), when the air conditioning unit is used for cooling or heating, the air valve device (41) closes the defrosting air pipe (40) and the exhaust duct (30) to communicate, when the air conditioning unit is used for defrosting, the air valve device (41) closes the exhaust duct (30) and the indoor to communicate, and opens the exhaust duct (30) and the defrosting air pipe (40) to communicate.

3. Air conditioning unit according to claim 2, characterized in that said air valve means (41) comprises an air valve (411) and a driving mechanism for driving said air valve (411) to rotate, said air valve (411) comprising a first position for closing said defrosting duct (40) in communication with said exhaust duct (30) and a second position for closing said exhaust duct (30) in communication with said room and opening said exhaust duct (30) in communication with said defrosting duct (40).

4. The air conditioning unit according to claim 1, wherein a fresh air inlet (11) is provided on the inner unit (10), the fresh air inlet (11) is connected to the fresh air duct (20), and the fresh air inlet (11) is further connected to an environment where the inner unit (10) is located.

5. Air conditioning unit according to claim 1, characterized in that an evaporator is provided in the inner unit (10), said evaporator being used for cooling or heating.

6. Air conditioning unit according to claim 1, characterized in that the air conditioning unit is a ducted air conditioning unit and the indoor unit (10) is an air indoor unit (10).

7. A control method of an air conditioning unit, characterized in that the control method is used for controlling the air conditioning unit according to any one of claims 1 to 6, and the control method comprises:

in the heating mode, if a defrosting instruction is received, the internal unit (10) performs cooling, the exhaust pipe (30) conveys cold air flow, and the defrosting air pipe (40) conveys the cold air flow conveyed by the exhaust pipe (30) to the fresh air pipe (20) and exhausts the cold air flow out of the room through the fresh air pipe (20); if the defrosting instruction is not received, the indoor unit (10) heats, and the exhaust pipe (30) conveys hot air to the indoor.

8. The control method according to claim 7, characterized in that an air valve device (41) is arranged on the defrosting air pipe (40), the air valve device (41) comprises an air valve (411) and a driving mechanism for driving the air valve (411) to rotate, the air valve (411) comprises a first position for closing the defrosting air pipe (40) and communicating with the exhaust duct (30) and a second position for closing the exhaust duct (30) and communicating with the indoor space and opening the exhaust duct (30) and communicating with the defrosting air pipe (40);

the control method further comprises the following steps: if a defrosting instruction is received, controlling the driving mechanism to drive the air valve (411) to rotate to a second position; and if the defrosting command is not received, controlling the driving mechanism to drive the air valve (411) to rotate to the first position.

9. The control method according to claim 8, characterized by further comprising:

after defrosting is finished, detecting the temperature value of the evaporator of the internal machine (10);

and if the temperature value is larger than a preset value, controlling the driving mechanism to drive the air valve (411) to rotate to a first position.

10. The control method according to claim 9, characterized by further comprising:

and after defrosting is finished, continuously detecting the temperature value of the evaporator of the internal machine (10) within a preset time length.

Technical Field

The invention relates to the technical field of air conditioners, in particular to an air conditioning unit and a control method of the air conditioning unit.

Background

The defrosting control method of the existing air conditioner comprises the following steps: the air conditioner is converted into refrigeration from a heating mode, a high-temperature refrigerant in a condenser of the outdoor unit is defrosted, at the moment, the indoor unit is a low-temperature refrigerant, in order to prevent cold air blown out from influencing the comfort of users, an indoor fan stops running and cannot perform heat exchange and evaporation, so that a large amount of liquid refrigerant enters a vapor-liquid separator and even flows into a compressor to generate liquid compression, and the service life of the compressor is influenced.

Disclosure of Invention

The embodiment of the invention provides an air conditioning unit and a control method of the air conditioning unit, and aims to solve the technical problem of compressor liquid compression caused by the fact that liquid refrigerants cannot be evaporated during defrosting of the air conditioning unit in the prior art.

The embodiment of the application provides an air conditioning unit, includes: an internal machine; the fresh air pipe is connected with the internal machine, and outdoor air can be conveyed into the internal machine through the fresh air pipe; the exhaust pipe is connected with the internal machine, and air after heat exchange of the internal machine can be conveyed to the indoor through the exhaust pipe; the defrosting air pipe is connected between the fresh air pipe and the exhaust pipe, when the air conditioning unit defrosts, the inner unit refrigerates, the exhaust pipe conveys cold air flow, and the defrosting air pipe conveys the cold air flow conveyed by the exhaust pipe to the fresh air pipe and is discharged outdoors through the fresh air pipe.

In one embodiment, the defrosting air pipe is provided with an air valve device, when the air conditioning unit is used for refrigerating or heating, the air valve device closes the defrosting air pipe to be communicated with the exhaust pipe, when the air conditioning unit is used for defrosting, the air valve device closes the exhaust pipe to be communicated with the indoor space, and opens the exhaust pipe to be communicated with the defrosting air pipe.

In one embodiment, the air valve device comprises an air valve and a driving mechanism for driving the air valve to rotate, wherein the air valve comprises a first position for closing the defrosting air pipe and communicating with the exhaust pipe and a second position for closing the exhaust pipe and communicating with the indoor space and opening the exhaust pipe and the defrosting air pipe.

In one embodiment, a fresh air port is formed in the inner machine and is connected with a fresh air pipe, and the fresh air port is also connected with the environment where the inner machine is located.

In one embodiment, an evaporator is provided in the indoor unit, and the evaporator is used for cooling or heating.

In one embodiment, the air conditioning unit is a ducted air conditioning unit and the indoor unit is an indoor unit.

The application also provides a control method of the air conditioning unit, the control method is used for controlling the air conditioning unit, and the control method comprises the following steps: in the heating mode, if a defrosting instruction is received, the indoor unit performs cooling, the exhaust pipe conveys cold air flow, the defrosting air pipe conveys the cold air flow conveyed by the exhaust pipe to the fresh air pipe, and the cold air flow is exhausted out of the room through the fresh air pipe; if the defrosting instruction is not received, the indoor unit heats, and the exhaust pipe conveys hot air to the indoor unit.

In one embodiment, an air valve device is arranged on the defrosting air pipe and comprises an air valve and a driving mechanism for driving the air valve to rotate, and the air valve comprises a first position for closing the defrosting air pipe and the exhaust pipe to be communicated and a second position for closing the exhaust pipe and the indoor to be communicated and opening the exhaust pipe and the defrosting air pipe to be communicated; the control method further comprises the following steps: if a defrosting instruction is received, controlling a driving mechanism to drive an air valve to rotate to a second position; and if the defrosting command is not received, controlling the driving mechanism to drive the air valve to rotate to the first position.

In one embodiment, the control method further comprises: detecting the temperature value of an evaporator of an inner machine after defrosting is finished; and if the temperature value is larger than the preset value, controlling the driving mechanism to drive the air valve to rotate to the first position.

In one embodiment, the control method further comprises: and after defrosting is finished, continuously detecting the temperature value of the evaporator of the internal machine within a preset time length.

In the above embodiment, when the air conditioning unit defrosts, directly let the interior machine refrigerate to carry the cold air current through the exhaust pipe, just can let the liquid in the interior machine absorb heat completely and evaporate and become the gaseous state, avoid the problem of compressor liquid compression in the follow-up operating mode. Meanwhile, when the cold air flow generated by the internal unit is conveyed through the exhaust pipe, the defrosting air pipe conveys the cold air flow conveyed by the exhaust pipe to the fresh air pipe, and the fresh air pipe is exhausted outdoors, so that the cold air flow is prevented from being conveyed indoors through the exhaust pipe, and the comfort of indoor heating is ensured. Therefore, the technical scheme of the invention can not influence the comfort of indoor users, simultaneously solves the problem that the service life of the compressor is influenced because the refrigerant of the indoor unit cannot be evaporated to form return liquid, and improves the operation reliability of the compressor.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic illustration of a partial configuration of an embodiment of an air conditioning assembly according to the present invention;

FIG. 2 is a schematic illustration of the position of movement of the damper of the air conditioning assembly of FIG. 1;

fig. 3 is a schematic flow diagram of a control method of an air conditioning assembly according to the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.

In order to solve the technical problem of compressor liquid compression during defrosting of the air conditioning unit in the prior art, as shown in fig. 1, the air conditioning unit comprises an inner unit 10, a fresh air pipe 20, an exhaust pipe 30 and a defrosting air pipe 40, wherein the fresh air pipe 20 is connected with the inner unit 10, and outdoor air can be conveyed into the inner unit 10 through the fresh air pipe 20. The exhaust duct 30 is connected to the indoor unit 10, and the air after heat exchange of the indoor unit 10 can be delivered to the indoor through the exhaust duct 30. The defrosting air pipe 40 is connected between the fresh air pipe 20 and the exhaust pipe 30, when the air conditioning unit defrosts, the internal unit 10 refrigerates, the exhaust pipe 30 conveys cold air flow, the defrosting air pipe 40 conveys the cold air flow conveyed by the exhaust pipe 30 to the fresh air pipe 20, and the fresh air pipe 20 exhausts the air to the outside.

By applying the technical scheme of the invention, when the air conditioning unit defrosts, the inner unit 10 is directly refrigerated, and cold airflow is conveyed through the exhaust pipe 30, so that liquid in the inner unit 10 can completely absorb heat and evaporate into gas, and the problem of compressor liquid compression in subsequent working conditions is avoided. Meanwhile, when the cold airflow generated by the internal unit 10 is conveyed through the exhaust duct 30, the defrosting air duct 40 conveys the cold airflow conveyed by the exhaust duct 30 to the fresh air duct 20, and the cold airflow is exhausted outdoors through the fresh air duct 20, so that the cold airflow is prevented from being conveyed indoors through the exhaust duct 30, and the comfort of indoor heating is ensured. Therefore, the technical scheme of the invention can not influence the comfort of indoor users, simultaneously solves the problem that the service life of the compressor is influenced because the refrigerant of the indoor unit cannot be evaporated to form return liquid, and improves the operation reliability of the compressor.

More preferably, in the technical solution of this embodiment, as shown in fig. 1, an air valve device 41 is disposed on the defrosting air duct 40, when the air conditioning unit is used for cooling or heating, the air valve device 41 closes the defrosting air duct 40 and communicates with the exhaust duct 30, the outdoor air can be delivered into the indoor unit 10 through the fresh air duct 20 for cooling or heating, and then the cold air flow or the hot air flow is delivered into the room through the exhaust duct 30. When the air conditioning unit defrosts, the air valve device 41 closes the exhaust duct 30 to communicate with the indoor space, opens the exhaust duct 30 to communicate with the defrosting air duct 40, and the indoor air or the outdoor air exchanges heat with the indoor unit 10 to promote the evaporation of the refrigerant in the indoor unit 10, and then the cold air flow is conveyed to the defrosting air duct 40 through the exhaust duct 30, and finally the cold air flow is conveyed to the fresh air duct 20 by the defrosting air duct 40 to be discharged to the outdoor space.

As shown in fig. 2, in the solution of the present embodiment, the air valve device 41 includes an air valve 411 and a driving mechanism for driving the air valve 411 to rotate. The air valve 411 comprises a first position for closing the defrosting air pipe 40 and the exhaust pipe 30 and a second position for closing the exhaust pipe 30 and the indoor and opening the exhaust pipe 30 and the defrosting air pipe 40. Alternatively, the driving mechanism may be a combination of a motor and a rack and pinion mechanism, or may be a rotating electric cylinder directly.

As shown in fig. 1, in the technical solution of this embodiment, a fresh air port 11 is opened on an inner machine 10, the fresh air port 11 is connected to a fresh air pipe 20, and the fresh air port 11 is further connected to an environment where the inner machine 10 is located. Therefore, when the air conditioning unit defrosts, indoor air or outdoor air can be utilized to exchange heat with the inner unit 10, so that the refrigerant in the inner unit 10 is fully evaporated.

In the technical scheme of this embodiment, an evaporator is arranged in the internal unit 10, and when the air conditioning unit is used for cooling or heating, the evaporator cools or heats air delivered to the room; during defrosting, the evaporator cools indoor air or outdoor air.

In the technical scheme of the invention, the air conditioning unit is an air duct type air conditioning unit, and the inner unit 10 is an air duct type air conditioning unit 10. In other alternative embodiments, the air conditioning unit may also be a fresh air unit or other type of air conditioning unit.

As shown in fig. 3, the present invention further provides a control method of an air conditioning unit, the control method is used for controlling the air conditioning unit, and the control method includes:

in the heating mode, if a defrosting instruction is received, the internal unit 10 performs cooling, the exhaust duct 30 delivers cold air flow, and the defrosting air duct 40 delivers the cold air flow delivered by the exhaust duct 30 to the fresh air duct 20 and exhausts the cold air flow out of the room through the fresh air duct 20; if the defrosting command is not received, the indoor unit 10 heats up, and the exhaust duct 30 delivers hot air to the indoor.

By applying the technical scheme of the invention, when defrosting is carried out in the heating mode, the internal unit 10 is directly refrigerated, and cold airflow is conveyed through the exhaust pipe 30, so that liquid in the internal unit 10 can completely absorb heat and evaporate into gas, and the problem of compressor liquid compression in subsequent working conditions is avoided. Meanwhile, when the cold airflow generated by the internal unit 10 is conveyed through the exhaust duct 30, the defrosting air duct 40 conveys the cold airflow conveyed by the exhaust duct 30 to the fresh air duct 20, and the cold airflow is exhausted outdoors through the fresh air duct 20, so that the cold airflow is prevented from being conveyed indoors through the exhaust duct 30, and the comfort of indoor heating is ensured. When the heating mode is normal, the indoor unit 10 heats, and the exhaust duct 30 delivers hot air to the indoor. Therefore, the technical scheme of the invention can not influence the comfort of indoor users, simultaneously solves the problem that the service life of the compressor is influenced because the refrigerant of the indoor unit cannot be evaporated to form return liquid, and improves the operation reliability of the compressor.

Alternatively, based on the air valve device 41 described above. The control method further comprises the following steps: if a defrosting instruction is received, controlling the driving mechanism to drive the air valve 411 to rotate to a second position; if the defrosting command is not received, the driving mechanism is controlled to drive the air valve 411 to rotate to the first position.

As a preferred implementation manner, in the technical solution of this embodiment, the control method further includes: after defrosting is finished, detecting the temperature value of the evaporator of the inner machine 10; if the temperature value is larger than the preset value, the driving mechanism is controlled to drive the air valve 411 to rotate to the first position. Therefore, the air after heat exchange can be prevented from being conveyed to the indoor through the exhaust pipe 30 when the temperature of the evaporator is low, and the influence of cold air on the comfort level of a user is avoided. More preferably, the control method further includes: after defrosting is finished, the temperature value of the evaporator of the inner unit 10 is continuously detected for a predetermined time period. Therefore, when the integral temperature of the evaporator is higher, hot air flow is conveyed indoors, and the comfort degree of a user is improved.