WO2019011178A1

WO2019011178A1 - Vertical air conditioner control method

Info

Publication number: WO2019011178A1
Application number: PCT/CN2018/094672
Authority: WO
Inventors: 刘卫兵; 耿宝寒; 朱辉; 刘庆赟
Original assignee: 青岛海尔空调器有限总公司
Priority date: 2017-07-11
Filing date: 2018-07-05
Publication date: 2019-01-17
Also published as: CN107367018B; CN107367018A

Abstract

An indoor unit of a vertical air conditioner comprises an upper evaporator (551), an upper fan (410), and at least one upper air supply outlet (112, 114), and a lower evaporator (552), a lower fan (420), and at least one lower air supply outlet (116). The vertical air conditioner control method comprises the following steps: (S502) detecting an indoor ambient temperature Ta; (S504) if Ta is higher than a preset comfortable cooling temperature range when the air conditioner is in a cooling mode, or Ta is lower than a preset comfortable heating temperature range when the air conditioner is in a heating mode, controlling both the upper fan (410) and the lower fan (420) to operate at a high rotation speed; if Ta is within the comfortable cooling temperature range when the air conditioner is in the cooling mode, or Ta is within the comfortable heating temperature range when the air conditioner is in the heating mode, controlling the upper fan (410) to operate at a high rotation speed and controlling the lower fan (420) to operate at a low rotation speed; and if Ta is lower than the comfortable cooling temperature range when the air conditioner is in the cooling mode, or Ta is higher than the comfortable heating temperature range when the air conditioner is in the heating mode, controlling the upper fan (410) to operate at a low rotation speed and stopping the lower fan (420).

Description

Vertical air conditioner control method

Technical field

The invention relates to the technical field of refrigeration, and in particular to a control method of a vertical air conditioner.

Background technique

At present, the existing vertical air conditioner supplies air to the room in a relatively fixed manner. Usually, an air supply port is provided on the upper part of the front panel of the indoor unit, or the air supply port is directed to blow air in a certain direction during air conditioning operation, or through automatic control. The swinging leaves circulate the wind, or the wind can avoid the human body according to the human sensor, and avoid the uncomfortableness caused by directly blowing the human body. In short, the air supply mode of the existing air conditioner is relatively simple, and the user experience is poor.

Summary of the invention

SUMMARY OF THE INVENTION One object of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a control method for a vertical air conditioner having a plurality of flower air supply modes.

A further object of the present invention is to improve the intelligence of the air supply of the air conditioner, to achieve on-demand air supply and gentle air supply, and to enhance user comfort.

In particular, the present invention provides a control method for a vertical air conditioner, the indoor unit of the vertical air conditioner including a matching upper evaporator, an upper fan, and at least one upper air supply port, and a lower evaporator, a lower fan, and at least one lower The air supply port, the control method includes the following steps:

Detecting the indoor ambient temperature Ta;

If the Ta is higher than the preset cooling comfort zone in the cooling mode or lower than the preset heating comfort zone in the heating mode, the upper fan and the lower fan are operated at a high speed;

If the Ta is in the cooling comfort zone in the cooling mode or in the heating comfort zone in the heating mode, the upper fan is operated at a high speed, so that the lower fan operates at a low speed;

If Ta is lower than the cooling comfort zone in the cooling mode or higher than the heating comfort zone in the heating mode, the upper fan is operated at a low speed to stop the lower fan.

Optionally, when the upper or lower fan is operated at a high speed, the upper evaporator or the lower evaporator is operated at a high refrigerant flow rate;

When the upper or lower fan is running at a low speed, the upper or lower evaporator is operated at a low refrigerant flow rate.

Optionally, the control method further includes:

Detecting the surface temperature of the human body, the position of the human body, and the number of people to determine the air supply demanding body that needs to be focused on the air supply;

If Ta is higher than the cooling comfort zone in the cooling mode or lower than the heating comfort zone in the heating mode, the upper air supply port and the lower air supply port are both directed to the adjacent area of the human body for air supply;

If the Ta is in the cooling comfort zone in the cooling mode or in the heating comfort zone in the heating mode, the upper air supply port and the lower air supply port are subjected to the maximum range sweeping and the air supply directions of the two are kept different;

If the Ta is lower than the cooling comfort zone in the cooling mode or higher than the heating comfort zone in the heating mode, the upper air outlet is subjected to the maximum range sweep.

Optionally, the steps of detecting the surface temperature of the human body, the position of the human body, and the number of persons to determine the air supply demanding body that needs to be focused on the air supply include:

If the number of people is one, the human body is required to supply the wind;

If the number of people is more than one person, in the cooling mode, the human body with the highest surface temperature is the air supply demanding body, and the human body with the lowest surface temperature in the heating mode is the human body for the air supply.

Optionally, the vertical air conditioner comprises a compressor, a condenser, a tee, a first electronic expansion valve and a second electronic expansion valve, and an upper evaporator and a lower evaporator; wherein

The inlet of the tee pipe is connected to the outlet of the condenser, and the two outlets of the tee pipe are respectively connected to the inlets of the first electronic expansion valve and the second electronic expansion valve;

The outlets of the first electronic expansion valve and the second electronic expansion valve are respectively connected to the inlets of the upper evaporator and the lower evaporator;

The outlets of the upper evaporator and the lower evaporator communicate with the inlet of the compressor.

Optionally, each air outlet is provided with:

a vertical pendulum group comprising a plurality of vertical pendulum leaves extending vertically and installed at the air supply opening, the plurality of vertical pendulum leaves being synchronously pivoted to adjust the left and right direction of the wind;

The yaw group includes a plurality of yaw leaves extending horizontally, which are installed behind the vertical pendulum leaves, and the plurality of yaw leaves are synchronously pivoted to adjust the up and down direction of the wind.

Optionally, the cooling comfort zone is 20 to 24 ° C; and the heating comfort zone is 18 to 22 ° C.

Optionally, the number of the upper air supply ports is two, and the number of the lower air supply ports is one; the two upper air supply ports and one lower air supply port are arranged in a vertical line.

Optionally, the upper fan and the lower fan are cross-flow fans that extend vertically in the axis.

Optionally, the upper evaporator and the lower evaporator are both finned evaporators and share the same set of fins, the coil of the upper evaporator is mounted on the upper part of the fin set, and the coil located in the lower evaporator is mounted on the fin The lower part of the group.

In the control method of the vertical air conditioner of the present invention, the air conditioner indoor unit is provided with two upper and lower evaporators, two fans and a plurality of air blowing ports, and according to the relationship between the indoor ambient temperature and the cooling comfort temperature zone (or the heating comfort zone) To adjust the number of fans to open, the wind speed and the refrigerant flow of the evaporator, to achieve intelligent adjustment of air volume and cooling capacity / heating capacity, so that the air volume and cooling capacity / heating capacity more closely match the indoor demand, saving air conditioning energy consumption.

Further, in the control method of the vertical air conditioner of the present invention, the air conditioner adjusts the wind direction of the air supply port according to the relationship between the surface temperature of the human body and the cooling comfort temperature zone (or the heating comfort temperature zone), and realizes the wind direction intelligence. Adjusting, when the demand for cooling (or heating) of the human body is large, the wind is blown to the adjacent area of the human body to achieve rapid cooling (or heating); in the air supply, the human body is in a comfortable temperature zone or heating comfort temperature. Zone, that is, when the demand for refrigeration (or heating) is small, the air supply port is normally swept, and the entire indoor space is taken into consideration to make the entire room uniformly cooled (heating); when the air supply demand does not require refrigeration (or heating), The maximum range of the upper air supply is swept, so that the lower air supply port stops the air supply, and while reducing the air volume and the cooling capacity (heat generation), the entire indoor space is taken into consideration, and the entire room is uniformly cooled (heated).

The above as well as other objects, advantages and features of the present invention will become apparent to those skilled in the <

DRAWINGS

Some specific embodiments of the present invention will be described in detail, by way of example, and not limitation, The same reference numbers in the drawings identify the same or similar parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. In the figure:

1 is a schematic structural view of a portion of a vertical air conditioner indoor unit according to an embodiment of the present invention;

2 is a refrigeration cycle diagram of a vertical air conditioner according to an embodiment of the present invention;

Figure 3 is an exploded perspective view showing the air supply structure of the vertical air conditioner indoor unit shown in Figure 1;

4 is a schematic structural view of an evaporator of a vertical air conditioner indoor unit according to an embodiment of the present invention;

Figure 5 is a schematic view showing a control method of a vertical air conditioner according to an embodiment of the present invention;

6 is a flow chart of a cooling method of a vertical air conditioner according to an embodiment of the present invention;

Fig. 7 is a flow chart showing the heating method of the vertical air conditioner according to an embodiment of the present invention.

Detailed ways

Embodiments of the present invention provide a method for controlling a vertical air conditioner. As shown in FIG. 1 to FIG. 4, the indoor unit of the vertical air conditioner includes a casing, two evaporators, two fans, a plurality of air blowing ports, and a plurality of swinging blade assemblies. The upper evaporator 551, the upper fan 410 and the at least one upper air supply opening 112, 114 are matched. The lower evaporator 552, the lower fan 420 and the at least one lower air supply port 116 are matched. 1 shows only the front panel 110 of the housing. The front panel 110 has the above-mentioned upper air supply opening and lower air supply opening, and the rear side of the housing is not shown with an air inlet. The outdoor air enters the casing from the air inlet, passes through two evaporators driven by the fan, and exchanges heat with the evaporator and blows into the room from the corresponding air supply port to realize cooling/heating of the indoor environment.

In the embodiment shown in FIGS. 1 to 4, the air conditioner indoor unit has two upper

air supply ports

112, 114 and one lower air supply port 116. The air outlet areas of the three

air supply openings

112, 114, 116 can be set to be the same, because the upper evaporator 551 and the upper fan 410 match the number of air supply ports, the heat exchange capacity of the upper evaporator 551 and the air supply of the upper fan 410. The capacity is greater than the lower evaporator 552 and the lower fan 420. For example, the two

evaporators

551, 552 can be placed under the same heat exchange condition, and the heat exchange amount of the upper evaporator 551 is twice that of the lower evaporator 552, so that the two fans are at the same speed, the upper fan 410 The air volume is twice that of the lower fan 420.

The two fans may each be a cross-flow fan. To make the connection between the cross-flow fan and the housing more stable, the motor 411 of the upper fan 410 may be located at the top thereof, and the motor 421 of the lower fan 420 is located at the bottom thereof. A bearing may be disposed between the two

fans

410, 420.

A plurality of swinging blade assemblies (eg, a plurality of vertical pendulum blades 312 at the air supply opening 112 and a plurality of yaw blades 322 forming a swinging blade assembly) are matched with the plurality of air supply openings for adjusting the wind direction of each air supply opening .

The vertical air conditioner indoor unit may further include a duct assembly that is erected between the upper fan 410, the lower fan 420, and the front panel 110, and includes a housing 120 and a plurality of partitions 121 defining a front and rear open guide a wind chamber, a plurality of partitions vertically arranged in the outer casing to separate the air guiding chambers from the plurality of

air passages

123, 124, 125 isolated from each other, each air passage matching an air supply opening for the fan The wind is drained to the air supply port, and the wind flowing to the plurality of air supply ports does not interfere with each other.

And, each pendulum assembly includes a pendulum group and a yaw group. Wherein, the vertical pendulum group includes a plurality of vertical pendulum leaves 312, 314, 316 vertically extending and installed at the

air blowing ports

112, 114, 116, and the plurality of vertical pendulum leaves can be pivoted synchronously to adjust the left and right direction of the wind. The yaw group includes a plurality of yaw leaves 324, 324, 326 extending horizontally, which are installed in the air duct, and the plurality of yaw leaves can be pivoted synchronously to adjust the up and down direction of the wind. By setting a motor to drive a yaw leaf (or vertical pendulum) to rotate, a hinge to the yaw leaf (or vertical pendulum) and the rest of the yaw leaf (or vertical pendulum) to achieve full horizontal Synchronous pivoting of the pendulum (or vertical pendulum). Of course, the yaw leaf can also be placed at the air outlet, and the vertical swing leaf can be placed in the air duct.

2, the refrigeration cycle system of the vertical air conditioner includes a compressor 510, a condenser 520, a three-way pipe 530, two

electronic expansion valves

541, 542, and two

evaporators

551, 552, wherein the inlet of the three-way pipe 530 is connected. At the outlet of the condenser 520, the two outlets of the tee 530 communicate with the inlets of the two

electronic expansion valves

541, 542, respectively. The outlets of the two

electronic expansion valves

541, 542 are respectively connected to the inlets of the upper evaporator 551 and the lower evaporator 552. The outlets of the upper evaporator 551 and the lower evaporator 552 communicate with the inlet of the compressor 510.

As shown in FIG. 1, the throttling element 541 is provided with a liquid separator 561, and the electronic expansion valve 542 can be provided with a liquid separator 562, which is used to divide the refrigerant into multiple channels to improve the heat exchange efficiency of the evaporator. After flowing through the coils of the two evaporators, the refrigerant merges into the header 580 and flows from the collector 580 to the compressor 510.

In some embodiments, as shown in FIG. 4, the upper evaporator 551 and the lower evaporator 552 are finned evaporators, and the two evaporators share the same fin set 501, and the coil 502 of the upper evaporator 551 is mounted to The upper portion of the fin group 501 and the coil 503 of the lower evaporator 552 are attached to the lower portion of the fin group 501. Compared with the two evaporators independently and each self-installing scheme, the embodiment can facilitate the manufacture and installation of the evaporator, and also save the internal space of the casing.

Fig. 5 is a schematic view showing a control method of a vertical air conditioner according to an embodiment of the present invention. As shown in FIG. 5, the control method of the present invention may include the following steps:

In step S502, the indoor ambient temperature is detected and recorded as Ta. In this step, Ta may be the temperature of a specific detection point in the room, or the average temperature of a plurality of detection points in the room.

Step S504, if the Ta is higher than the preset cooling comfort temperature zone in the cooling mode or lower than the preset heating comfort temperature zone in the heating mode, the upper fan 410 and the lower fan 420 are all operated at a high rotation speed. In order to achieve rapid cooling or heating, the surface temperature of the human body required for air supply can quickly reach the cooling comfort temperature zone or the heating comfort zone, so that the human body can enter the comfort state more quickly.

If the Ta is in the cooling comfort zone in the cooling mode or in the heating comfort zone in the heating mode, the upper fan 410 is operated at a high speed, so that the lower fan 420 operates at a low speed, so that the two fans realize differential operation. In order to reduce the total air volume of the two fans and reduce the energy consumption of the fan.

If the Ta is lower than the cooling comfort zone in the cooling mode or higher than the heating comfort zone in the heating mode, the upper fan 410 is operated at a low speed, so that the lower fan 420 is stopped, so that the human body is already undercooled (cooling) Mode) or overheating (heating mode) state, therefore, it is no longer necessary to cool the human body, and it is only necessary to operate the upper fan 410 at a low speed to maintain the indoor temperature.

In the above steps, the cooling comfort zone can be defined as 20 to 24 ° C (including the end point), and the heating comfort zone is 18 to 22 ° C (including the end point). Moreover, the upper fan 410 and the lower fan 420 can have two speed gears respectively, the high speed is a high gear (such as 950 rpm), and the low speed is a low gear (such as 750 rpm). In addition, in the above control method, the refrigerant flow rate of the two evaporators can be adjusted by adjusting the opening degree of the electronic expansion valve to match the air volume of the fan (related to the fan speed), thereby improving the cooling/heating cycle. effectiveness. That is, when the upper or lower fan is running at a high speed, the upper evaporator or the lower evaporator is operated at a high refrigerant flow rate, and when the upper or lower fan is operated at a low rotation speed, the upper evaporator or the lower evaporator is made lower. The refrigerant flow runs. The specific flow values of high refrigerant flow and low refrigerant flow need to be confirmed experimentally.

Fig. 6 is a flow chart showing the cooling method of the vertical air conditioner according to an embodiment of the present invention. In some embodiments, the air conditioner is in a cooling mode and the following steps can be used to deliver air.

Step S602, detecting the surface temperature of the human body, the position of the human body, and the number of people. The human body detecting device 200 may be disposed on the indoor unit front panel 110 to detect the above content. The human body detecting device 200 can be an infrared sensor.

In step S404, it is determined whether the number of people is one person. If the number of people is one, step S406 is performed. If the number of people is multiple, step S408 is performed.

In step S606, it is determined that only one human body in the room is a human body for air supply.

In step S608, the human body with the highest surface temperature is required to supply air to the human body.

In step S609, the indoor ambient temperature Ta is detected.

In step S610, it is determined whether Ta is in the cooling comfort temperature interval. If yes, step S612 is performed, and if no, step S614 is performed.

Step S612, the upper fan 410 is operated at a high rotation speed, the lower fan 420 is operated at a low rotation speed, the upper evaporator 551 is operated at a high refrigerant flow rate, and the lower evaporator 552 is operated at a low refrigerant flow rate; the upper air supply port and the lower air supply port are provided Perform the maximum range sweep and keep the air supply directions different. The maximum range of wind sweeping refers to the maximum angular swing of the yaw and yaw leaves to maximize the air supply range of the air conditioner to meet the cooling needs of the entire indoor area. Keeping the air supply directions of the upper

air supply ports

112, 114 and the lower air supply port 116 different can make the air outlet of the air conditioner more dispersed, for example, the wind direction of the two air supply ports is different, such as sweeping the wind from left to right, and the other Sweep the wind from right to left. Or make both air outlets sweep left and right (or sweep the wind from right to left), but make the sweeping steps different. For a certain area, let the winds pass through, avoiding both at the same time. Air is supplied to the same part, resulting in uneven distribution of cooling capacity.

In step S614, it is determined whether Ta is lower than the cooling comfort temperature interval. If yes, step S616 is performed, and if no, step S618 is performed.

In step S616, Ta is lower than the cooling comfort temperature interval, at which time the cooling demand is low, the upper fan 410 is operated at a low speed, and the lower fan 420 is stopped. The upper evaporator 551 is operated at a low refrigerant flow rate so that the refrigerant flow rate of the lower evaporator 552 is zero, and the upper

air supply ports

112, 114 are subjected to the maximum range sweep.

Step S618, Ta is higher than the cooling comfort temperature range, and the cooling demand is large at this time, so that both the upper fan 410 and the lower fan 420 are operated at a high rotation speed, so that both the upper evaporator 551 and the lower evaporator 552 operate at a high refrigerant flow rate; The upper

air supply ports

112, 114 and the lower air supply port 116 respectively direct the air supply to the adjacent area of the air supply demanding body, that is, the yaw leaves and the vertical swing leaves remain stationary, so that the cold air is concentratedly blown to the most needed area. In this way, the human body can be quickly cooled to the air supply demand, and the cold wind can be prevented from directly blowing the human body to cause the human body to be uncomfortable.

The control method of the present invention determines the human body that is most in need of air supply according to the surface temperature of the human body, and supplies the human body to the air supply demand, and adjusts the air supply direction according to the position of the human body according to the air supply demand, thereby realizing intelligent adjustment of the wind direction.

Fig. 7 is a flow chart showing the heating method of the vertical air conditioner according to an embodiment of the present invention. The heating mode of the air conditioner is similar to the cooling mode. A brief introduction is given below. When the air conditioner is in the heating mode, the following steps can be used to supply air.

Step S702, detecting the surface temperature of the human body, the position of the human body, and the number of people.

In step S704, it is determined whether the number of people is one person. If the number of people is one, step S706 is performed. If the number of people is multiple, step S708 is performed.

Step S706, determining that only one human body in the room is a human body for supplying air.

In step S708, the human body with the lowest surface temperature is the air supply demanding body.

In step S709, the indoor ambient temperature Ta is detected.

In step S710, it is determined whether Ta is in the heating comfort temperature interval, and if so, step S712 is performed, and if no, step S714 is performed.

Step S712, the upper fan 410 is operated at a high rotation speed, the lower fan 420 is operated at a low rotation speed, the upper evaporator 551 is operated at a high refrigerant flow rate, and the lower evaporator 552 is operated at a low refrigerant flow rate; the upper air supply port and the lower air supply port are provided Perform the maximum range sweep and keep the air supply directions different.

In the above steps, it is preferable that the upper

air supply ports

112, 114 and the lower air supply port 116 are subjected to the maximum range sweeping, so as to balance the heating demand of the entire indoor area, and the air blowing directions of the upper

air supply ports

112, 114 and the lower air supply port 116 are provided. Keeping different can make the air outlet of the air conditioner more dispersed. For example, the two air outlets have different sweep directions, such as one sweeping from left to right and the other sweeping from right to left. Or make both air outlets sweep left and right (or sweep the wind from right to left), but make the sweeping steps different. For a certain area, let the winds pass through, avoiding both at the same time. Air is supplied to the same part, resulting in uneven heat distribution.

In step S714, it is determined whether Ta is higher than the heating comfort temperature interval. If yes, step S716 is performed, and if no, step S718 is performed.

In step S716, Ta is higher than the heating comfort temperature interval, the upper fan 410 is operated at a low speed, and the lower fan 420 is stopped. The upper evaporator 551 is operated at a low refrigerant flow rate so that the refrigerant flow rate of the lower evaporator 552 is zero, and the upper

air supply ports

112, 114 are subjected to the maximum range sweep.

Step S718, Ta is lower than the heating comfort temperature interval, so that both the upper fan 410 and the lower fan 420 are operated at a high rotation speed, so that both the upper evaporator 551 and the lower evaporator 552 are operated at a high refrigerant flow rate; the upper

air supply ports

112, 114 are provided. Both the lower air supply port 116 and the lower air supply port 116 direct the air supply to the adjacent area of the air supply demanding body, that is, the yaw leaf and the vertical swing leaf remain stationary, so that the hot air is concentrated to the most needed area. In this way, the human body can be quickly cooled to the air supply demand, and the cold wind can be prevented from directly blowing the human body to cause the human body to be uncomfortable.

In this regard, it will be appreciated by those skilled in the <RTIgt;the</RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; The content directly determines or derives many other variations or modifications consistent with the principles of the invention. Therefore, the scope of the invention should be understood and construed as covering all such other modifications or modifications.

Claims

A method for controlling a vertical air conditioner, the indoor unit of the vertical air conditioner comprising a matching upper evaporator, an upper fan and at least one upper air supply port, and a lower evaporator, a lower fan and at least one lower air supply port, The control method includes the following steps:

Detecting the indoor ambient temperature Ta;

If the Ta is higher than the preset cooling comfort temperature zone in the cooling mode or lower than the preset heating comfort temperature zone in the heating mode, the upper fan and the lower fan are both operated at a high rotation speed;

If the Ta is in the cooling comfort zone in the cooling mode or in the heating comfort zone in the heating mode, the upper fan is operated at a high speed, and the lower fan is operated at a low speed;

If the Ta is lower than the cooling comfort zone in the cooling mode or higher than the heating comfort zone in the heating mode, the upper fan is operated at a low speed to stop the lower fan.
The control method according to claim 1, wherein

When the upper fan or the lower fan is operated at a high rotational speed, the upper evaporator or the lower evaporator is operated at a high refrigerant flow rate;

The upper evaporator or the lower evaporator is operated at a low refrigerant flow rate when the upper or lower fan is operated at a low rotational speed.
The control method according to claim 2, further comprising:

Detecting the surface temperature of the human body, the position of the human body, and the number of people to determine the air supply demanding body that needs to be focused on the air supply;

If the Ta is higher than the cooling comfort temperature zone in the cooling mode or lower than the heating comfort temperature zone in the heating mode, the upper air supply port and the lower air supply port are both required to supply the air to the air supply body. Directional air supply in the vicinity;

If the Ta is in the cooling comfort zone in the cooling mode or in the heating comfort zone in the heating mode, the upper air supply port and the lower air supply port are subjected to a maximum range sweeping and both The direction of supply air remains different;

If the Ta is lower than the cooling comfort zone in the cooling mode or higher than the heating comfort zone in the heating mode, the upper air outlet is subjected to a maximum range sweep.
The control method according to claim 3, wherein the step of detecting the surface temperature of the human body in the room, the position of the human body, and the number of persons to determine the air supply demanding body to be focused on the air supply comprises:

If the number of people is one person, the human body is used as the air supply requirement;

If the number of people is multiple, in the cooling mode, the human body with the highest surface temperature is the human body for the air supply demand, and the human body with the lowest surface temperature in the heating mode is the human body for the air supply.
The control method according to claim 1, wherein

The vertical air conditioner includes a compressor, a condenser, a tee, a first electronic expansion valve, and a second electronic expansion valve, and the upper evaporator and the lower evaporator;

An inlet of the three-way pipe is connected to an outlet of the condenser, and two outlets of the three-way pipe respectively communicate with an inlet of the first electronic expansion valve and the second electronic expansion valve;

An outlet of the first electronic expansion valve and the second electronic expansion valve respectively communicates with an inlet of the upper evaporator and the lower evaporator;

An outlet of the upper evaporator and the lower evaporator communicates with an inlet of the compressor.
The control method according to claim 1, wherein

Each of the air supply openings is provided with:

a vertical pendulum group comprising a plurality of vertical pendulum blades extending vertically and mounted at the air supply opening, the plurality of vertical pendulum leaves being synchronously pivoted to adjust a left-right direction of the wind;

The yaw group includes a plurality of yaw blades extending horizontally, which are mounted behind the yaw leaves, and the plurality of yaw leaves are synchronously pivoted to adjust the up and down direction of the wind.
The control method according to claim 1, wherein

The cooling comfort temperature zone is 20 to 24 ° C;

The heating comfort zone is 18 to 22 °C.
The control method according to claim 1, wherein

The number of the upper air supply ports is two, and the number of the lower air supply ports is one;

Two of the upper air supply openings and one of the lower air supply openings are arranged in a vertical line.
The control method according to claim 1, wherein

The upper fan and the lower fan are cross-flow fans that extend vertically in the axis.
The control method according to claim 1, wherein

The upper evaporator and the lower evaporator are both finned evaporators and share the same set of fins, and the coil of the upper evaporator is mounted on an upper portion of the fin set at the lower evaporator A coil is mounted to a lower portion of the fin set.