CN107655108A - The control method of air conditioner and air conditioner - Google Patents

Abstract

The present invention proposes an air conditioner and a control method for the air conditioner, wherein the air conditioner includes: an outdoor unit; a first indoor unit connected to the outdoor unit for regulating the indoor ambient temperature; at least one second indoor unit, simultaneously The first indoor unit is set in the same room, is connected with the outdoor unit, and communicates with the outdoor environment, and is used to deliver outdoor air to the room and regulate the temperature of the indoor environment; the second indoor unit includes: a shell on which a second An air inlet and an air outlet, the air outlet is facing indoors; the fan is arranged in the casing, and the air outlet side of the fan is facing the air outlet; the heat exchanger is arranged in the casing, and is located between the first air inlet and the air inlet side of the fan ; Wherein, the airflow entering the casing from the first air inlet passes through the heat exchanger and then enters the fan. The air conditioner proposed by the present invention, on the one hand, reduces the energy consumption of the air conditioner, and on the other hand, makes both the first indoor unit and the second indoor unit simple in structure and small in size.

Description

Air conditioner and control method of air conditioner

technical field

The present invention relates to the technical field of air conditioners, in particular to an air conditioner and a control method for the air conditioner.

Background technique

At present, when people use air conditioners, if they do not close the doors and windows tightly, it will cause a lot of waste of energy consumption. The air quality in most areas is poor and the smog is severe. People have to close the doors and windows for a long time to avoid the smog. In order to solve this situation, the fresh air system operation was born. However, the current wall-mounted fresh air system is large, which affects the appearance of home decoration; and it cannot adjust the temperature of the fresh air, resulting in a large temperature difference between the fresh air and the air-conditioned room, which greatly affects the user experience; on the other hand, in order to ensure the heat exchange effect of the air conditioner , usually use high-power compressors and fans, but when people use inverter air conditioners, except for using high cooling capacity and high wind speed to quickly adjust the temperature of the room when starting up, the compressor keeps running at a low frequency at other times , The fan also keeps running at a low speed, which makes the high-frequency section of the compressor vacant for a long time.

Contents of the invention

The present invention aims to at least solve the problems in the prior art that the air conditioner with fresh air function is too large and cannot adjust the temperature of the fresh air, and that the high frequency section of the air conditioner compressor has been vacant for a long time, and the speed of the fan is too low when the fan adopts a low wind gear and deviates from the optimum. Efficiency points, technical issues affecting air conditioning energy consumption.

Therefore, according to the embodiment of the first aspect of the present invention, the present invention provides an air conditioner capable of providing fresh air to the room.

According to the second embodiment of the present invention, the present invention proposes a control method of an air conditioner capable of controlling the fresh air function.

In view of this, according to the first embodiment of the present invention, the present invention proposes an air conditioner, including: an outdoor unit; a first indoor unit connected to the outdoor unit for regulating the indoor ambient temperature; at least one second The indoor unit is set in the same room as the first indoor unit, is connected with the outdoor unit, and communicates with the outdoor environment, and is used to deliver outdoor air to the room and regulate the temperature of the indoor environment; the second indoor unit includes: a shell, a shell A first air inlet and an air outlet are arranged on the top, and the air outlet faces indoors; the fan is arranged in the casing, and the air outlet side of the fan faces the air outlet; the heat exchanger is arranged in the casing, and is located between the first air inlet and the fan inlet. Between the wind side; wherein, the airflow entering the casing from the first air inlet passes through the heat exchanger and then enters the fan.

The air conditioner proposed by the present invention, on the one hand, adjusts the indoor temperature jointly by setting multiple indoor units in the same room, so that multiple temperature adjustment points appear in the same room, so that the cooling capacity configuration of the first indoor unit is reduced, so , after the air conditioner is running at full capacity to quickly adjust the temperature, when using low frequency operation, the compressor and fan are still at a higher efficiency point, so as to avoid the compressor running at too low frequency or the fan running at too low speed, thereby reducing the The energy consumption of the air conditioner is reduced; on the other hand, because the second indoor unit has a fresh air function, it can transport outdoor air to the room, thereby improving the amount of air in the indoor environment and ensuring people's health. The second indoor unit is formed independently, so that both the first indoor unit and the second indoor unit have a simple structure and small size. Specifically, the working mode of the second indoor unit is as follows: the second indoor unit introduces fresh air into the room through the first air inlet, and the fan sends the outdoor air into the room, and the fresh air flows through the heat exchanger before entering the room, so that The temperature of the fresh air can be adjusted to ensure the comfort of the indoor environment temperature.

In addition, the air conditioner in the above embodiments provided by the present invention may also have the following additional technical features:

In the above technical solution, preferably, the second indoor unit further includes: an air duct, one end of which is connected to the first air inlet, and the other end is connected to the outdoor environment.

In this technical solution, the second indoor unit introduces fresh air into the room from the first air inlet through the air duct. Specifically, one end of the air duct is connected to the outdoor, and the other end is connected to the first air inlet. Since the second indoor unit is hung on Indoors, therefore, in order to deliver outdoor air indoors, it is necessary to open a through hole on the indoor wall, and fill the position of the through hole with the air duct, so as to prevent the building materials of the wall from falling off and being sucked into the second indoor unit.

In any of the above technical solutions, preferably, the second indoor unit further includes: a filter screen disposed at the first air inlet for filtering impurities and/or harmful gases in the outdoor air.

In this technical solution, by setting a filter screen at the first air outlet, the outdoor air can be filtered to remove harmful impurities and harmful gases, such as PM2.5, formaldehyde, benzene, etc., so as to avoid the pollution of indoor air Secondary pollution to ensure people's health.

In any of the above-mentioned technical solutions, preferably, the second indoor unit further includes: at least one second air inlet, which is arranged on the housing and communicates with the indoor environment, and the airflow entering the housing from the second air inlet passes through the After the heater enters the fan; at least one switch is respectively arranged on at least one second air inlet for opening or closing the second air inlet; the baffle is arranged on one side of the filter screen and connected with the filter screen, The plate and the filter screen are movably arranged in the housing for opening or closing the first air inlet; the driving device is connected with the baffle and/or the filter screen, and the baffle is used to drive the baffle plate and the filter screen to move; wherein, The driving device drives the filter screen and the baffle to match the filter screen with the first air inlet. When the first air inlet is opened, the switch closes the second air inlet; The air inlet is matched, and when the first air inlet is closed, the switch opens the second air inlet.

In this technical solution, by setting the second air inlet on the casing of the second indoor unit, the indoor air is internally circulated, so that the second indoor unit has dual modes of external circulation and internal circulation, thereby improving the scope of application of the air conditioner. Specifically, when the second indoor unit adopts the external circulation mode, the baffle is driven by the driving device to disengage from the first air inlet, and the first air inlet is blocked by the filter to filter the outdoor air, and the switch is closed to block The second air inlet prevents indoor air from entering the housing and ensures the quality of fresh air; on the contrary, when the second indoor unit adopts the internal circulation mode, the filter screen is driven by the driving device to separate from the first air inlet, and the first air inlet is blocked by the baffle. The air inlet is used to prevent outdoor air from entering the room, and the switch is turned on to open the second air inlet to realize the internal circulation of indoor air for heat exchange and ensure heat exchange efficiency.

In any of the above technical solutions, preferably, the driving device is a first motor or a telescopic rod.

In this technical solution, the movement of the baffle plate and the filter screen is driven by the first motor or the telescopic rod, so as to realize the automatic control of the baffle plate and the filter screen.

In any of the above technical solutions, preferably, the second indoor unit further includes: an air quality detection device, arranged on the housing, for detecting the air quality in the indoor environment; wherein, when the indoor ambient air quality exceeds the preset range , the first air inlet is opened and the second air inlet is closed.

In this technical solution, the indoor air quality is detected by the air quality detection device. When the indoor ambient air quality exceeds the preset range, the first air inlet will be opened, the second air inlet will be closed, and the external circulation will be carried out; otherwise, when the indoor environment When the air quality does not exceed the preset range, the first air inlet is closed, the second air inlet is opened, and the internal circulation is carried out. Since the temperature of the indoor air is relatively average, and the temperature of the outdoor air has a large temperature difference, it is used according to different situations. Different circulation methods avoid unnecessary energy consumption and realize energy saving and environmental protection.

In any of the above technical solutions, preferably, the second indoor unit further includes: a temperature detection device, arranged on the casing, for detecting the outdoor ambient temperature and the indoor ambient temperature; wherein, when the air is delivered from the outdoor environment to the indoor When the temperature detection device detects that the temperature difference between the outdoor ambient temperature and the indoor ambient temperature is greater than or equal to the preset temperature difference, the heat exchanger works to adjust the temperature difference between the temperature of the airflow passing through the heat exchanger and the indoor ambient temperature to be less than the preset temperature difference.

In this technical solution, the temperature difference between the outdoor temperature and the indoor temperature is detected by the temperature detection device, and when the second indoor unit adopts the external circulation operation, it is first judged whether the temperature difference between the outdoor air temperature and the air temperature is less than the preset temperature difference , wherein, when the temperature difference between the outdoor air temperature and the air temperature is greater than or equal to the preset temperature difference, the compressor works, and the heat exchanger adjusts the outdoor air so that the temperature difference between the fresh air and the indoor air is less than the preset temperature In order to ensure the comfort of the indoor environment temperature; when the temperature difference between the outdoor air temperature and the air temperature is rainy and the preset temperature difference, the compressor works, the heat exchanger does not adjust the temperature of the fresh air, and the fresh air enters directly through the fan to Avoid unnecessary energy consumption and realize energy conservation and environmental protection.

In any of the above technical solutions, preferably, the fan includes: a multi-blade centrifugal air channel; an impeller disposed in the multi-blade centrifugal air channel; a second motor connected with the impeller for driving the impeller to rotate.

In this technical solution, the air supply distance of the centrifugal fan is long. Therefore, the second indoor unit can send the temperature-adjusted air to a farther position in the room through the centrifugal fan composed of the multi-blade centrifugal air duct, the impeller and the second motor. The speed of air circulation is improved, and the speed of adjusting the temperature of the indoor environment is accelerated.

In any of the above technical solutions, preferably, the range of the ratio of the cooling capacity distributed by the outdoor unit to the first indoor unit and to the second indoor unit is greater than or equal to 0.5 and less than or equal to 3.

In this technical solution, by setting the value range of the ratio of the cooling capacity distributed from the outdoor unit to the first indoor unit to the second indoor unit to be greater than or equal to 0.5 and less than or equal to 3, the cooling capacity of the first indoor unit is ensured. The volume configuration is relatively small. After the air conditioner is running at full capacity for rapid temperature adjustment, the compressor and fan are still at a higher efficiency point when operating at a low frequency, so as to avoid the compressor operating at an excessively low frequency or the fan operating at an excessively low speed The technical effect of operation.

In any of the above technical solutions, preferably, the first indoor unit includes: a cross-flow fan, and the cross-flow fan adopts frequency conversion control.

In this technical solution, the first indoor unit realizes the circulation of indoor air through the cross-flow fan controlled by frequency conversion, so that the air flow and wind speed are evenly distributed, and the speed of adjusting the indoor environment temperature is accelerated.

According to the second embodiment of the present invention, the present invention proposes an air conditioner control method for the air conditioner, the air conditioner includes a first indoor unit and a second indoor unit; the first indoor unit has an internal circulation function, The second indoor unit has an internal circulation function and an external circulation function; the second indoor unit is provided with a temperature sensor for detecting the outdoor air temperature; and an air quality detection device for detecting the indoor air quality. The control method includes: when the indoor temperature and When the temperature difference between the preset temperatures is greater than or equal to the first preset temperature difference, the first indoor unit and the second indoor unit will simultaneously carry out air supply and temperature adjustment in the room through internal circulation, so that the temperature between the indoor temperature and the preset temperature The difference is less than the first preset temperature difference; when the temperature difference between the indoor temperature and the preset temperature is less than the first preset temperature difference, the second indoor unit turns off the temperature adjustment function and detects the indoor air quality; when it detects When the indoor air quality exceeds the preset range, the second indoor unit starts the external circulation function to deliver the outdoor air to the room so that the indoor air quality is within the preset range.

In the control method of the air conditioner proposed by the present invention, the preset temperature is set in advance, and when the temperature difference between the indoor temperature and the preset temperature is greater than or equal to the first preset temperature difference, the first indoor unit and the second indoor unit simultaneously use full power to The indoor temperature is adjusted and the air is supplied so that the indoor temperature quickly reaches the preset temperature. After the temperature difference between the indoor temperature and the preset temperature is adjusted to be less than the first preset temperature difference, the second indoor unit turns off the temperature adjustment function , and detect the indoor air quality. When the detected indoor air quality exceeds the preset range, the second indoor unit will start the external circulation function to deliver the outdoor air to the room to improve the indoor air quality so that the indoor air quality Within the preset range, the air conditioner quickly adjusts the indoor ambient temperature, and ensures the quality of the indoor air and people's health.

In the above technical solution, preferably, it also includes: when the second indoor unit turns on the external circulation function to deliver the outdoor air to the room, detecting the temperature of the outdoor air; when the temperature difference between the outdoor air temperature and the indoor temperature is greater than When equal to the second preset temperature difference, the second indoor unit adjusts the temperature of the outdoor air so that the temperature difference between the temperature of the outdoor air and the indoor temperature is smaller than the second preset temperature difference.

In this technical solution, the temperature of the outdoor air is detected by the temperature detection device, and when the temperature difference between the temperature of the outdoor air and the indoor temperature is greater than or equal to the second preset temperature difference, the second indoor unit will adjust the temperature of the fresh air to The temperature of the fresh air is adjusted so that the temperature difference between it and the indoor temperature is smaller than the second preset temperature difference, thereby ensuring the stability of the indoor ambient temperature and ensuring people's comfort.

In any of the above technical solutions, preferably, the closing of the temperature adjustment function of the second indoor unit specifically includes: closing the temperature adjustment function of the second indoor unit and closing the air supply function; or closing the temperature adjustment function of the second indoor unit and maintaining the air supply function .

In this technical solution, when the temperature difference between the indoor temperature and the preset temperature is smaller than the first preset temperature difference, the second indoor unit can turn off the temperature adjustment function, and at the same time, turn off the air supply function; or turn off the temperature adjustment function, To maintain the air supply function, the two operating modes can be set by the factory or selected by the user's remote control.

In any of the above technical solutions, preferably, detecting the indoor air quality specifically includes: detecting the impurity content in the indoor air; and/or detecting the harmful gas content in the indoor air; wherein, the impurity content in the indoor air is related to When at least one of the harmful gas content in the indoor air exceeds the preset range, the second indoor unit will start the external circulation function.

In this technical solution, the pollution to air quality usually includes: solid impurity pollution and harmful gas pollution, such as: PM2.5 or carbon dioxide, etc., and the second indoor unit that exceeds the standard of any of the above two will open the external circulation to introduce the outdoor air into the Indoors, to improve the air quality of the indoor environment.

Additional aspects and advantages of the invention will become apparent in the description which follows, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 shows a schematic diagram of the air conditioner provided by the embodiment of the first aspect of the present invention installed inside a house;

Fig. 2 shows a schematic diagram of the air conditioner provided by the embodiment of the first aspect of the present invention installed on the outside of the house;

Fig. 3 shows a schematic structural view of the second indoor unit in the air conditioner provided in the embodiment of the first aspect of the present invention in the external circulation mode;

Fig. 4 shows a sectional view of the A-A direction of the second indoor unit shown in Fig. 3;

Fig. 5 shows a sectional view of the B-B direction of the second indoor unit shown in Fig. 3;

Fig. 6 shows a left view of the second indoor unit shown in Fig. 3;

Fig. 7 shows a schematic structural view of the second indoor unit in the air conditioner provided in the embodiment of the first aspect of the present invention to start the internal circulation mode;

Fig. 8 shows a sectional view of the C-C direction of the second indoor unit shown in Fig. 7;

Fig. 9 shows a D-D cross-sectional view of the second indoor unit shown in Fig. 7;

Fig. 10 shows a left view of the second indoor unit shown in Fig. 7;

Fig. 11 shows a flow chart of the control method of the air conditioner provided by the embodiment of the second aspect of the present invention;

Fig. 12 shows a flow chart of an air conditioner control method provided by another embodiment in the embodiment of the second aspect of the present invention.

Wherein, the corresponding relationship between reference numerals and component names in Fig. 1 to Fig. 10 is:

1 air conditioner, 10 outdoor unit, 20 first indoor unit, 30 second indoor unit, 32 shell, 322 air outlet, 324 first air inlet, 326 second air inlet, 34 air duct, 36 fan, 362 multi-wing Centrifugal air duct, 364 impellers, 366 second motors, 38 heat exchangers, 40 filter screens, 42 switches, 44 baffle plates, 46 wind deflectors.

Detailed ways

In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

An air conditioner 1 provided according to some embodiments of the present invention is described below with reference to FIGS. 1 to 10 .

As shown in Figure 1 and Figure 2, according to the first embodiment of the present invention, the present invention provides an air conditioner 1, comprising: an outdoor unit 10; a first indoor unit 20, connected to the outdoor unit 10, for Regulate the indoor ambient temperature; at least one second indoor unit 30 is set in the same room as the first indoor unit 20, connected with the outdoor unit 10, and communicated with the outdoor environment, for delivering outdoor air to the room and regulating the indoor ambient temperature The second indoor unit 30 includes: a housing 32, the housing 32 is provided with a first air inlet 324 and an air outlet 322, and the air outlet 322 faces indoors; the fan 36 is arranged in the housing 32, and the air outlet side of the fan 36 Toward the air outlet 322; the heat exchanger 38 is arranged in the housing 32, between the first air inlet 324 and the air inlet side of the blower fan 36; wherein, the airflow entering the housing 32 by the first air inlet 324 passes through After the heat exchanger 38, it enters the fan 36.

The air conditioner 1 provided by the present invention, on the one hand, adjusts the indoor temperature jointly by setting multiple indoor units in the same room, so that multiple temperature adjustment points appear in the same room, so that the cooling capacity configuration of the first indoor unit 20 is reduced. , therefore, after the air conditioner 1 is running at full capacity for rapid temperature adjustment, when the low-frequency operation is adopted, the compressor and the fan 36 are still at a higher efficiency point, so as to avoid the compressor operating at an excessively low frequency, or the fan operating at an excessively low speed operation, thereby reducing the energy consumption of the air conditioner 1; on the other hand, because the second indoor unit 30 has a fresh air function, it can transport outdoor air to the room, thereby improving the amount of air in the indoor environment and ensuring people's health. , and the first indoor unit 20 and the second indoor unit 30 are simple in structure and small in size. Specifically, the second indoor unit 30 is hoisted indoors through the casing 32, and a through hole is opened on the indoor wall at a position compatible with the first air inlet 324, and the outdoor air is transported into the room by the fan 36, and the fresh air is Before entering the room, it flows through the heat exchanger 38, so that the temperature of the fresh air can be adjusted to ensure the comfort of the indoor environment temperature.

For example: when the air conditioner 1 is just turned on, the first indoor unit 20 and the second indoor unit 30 simultaneously use the maximum heat transfer to adjust the indoor ambient temperature. frequency operation, therefore, the cooling capacity configuration of the first indoor unit 20 is reduced, and after the air conditioner 1 is fully operated for rapid temperature adjustment, the compressor will not operate at an excessively low frequency, and the fan will not operate at an excessively low speed. running, the compressor and fan are still at a higher efficiency point, thereby reducing the energy consumption of the air conditioner 1 .

In one embodiment of the present invention, preferably, as shown in FIGS. 3 to 10 , the second indoor unit 30 further includes: an air duct 34 , one end of which is connected to the first air inlet 324 and the other end is connected to the outdoor environment.

In this embodiment, the second indoor unit 30 is hoisted indoors through the casing 32, and a through hole is opened on the indoor wall to install the air duct 34, and then the fresh air is introduced into the room from the first air inlet 324 through the air duct 34, Moreover, since the air duct is used to fill the position of the through hole, it is avoided that the building materials of the wall fall off and are sucked into the second indoor unit.

In one embodiment of the present invention, preferably, as shown in Fig. 4 , Fig. 5 , Fig. 8 to Fig. 10 , the second indoor unit 30 further includes: a filter screen 40 arranged at the first air inlet 324 for Filters impurities and/or harmful gases from outdoor air.

In this embodiment, by setting the HEPA filter 40 at the first air outlet 322, the outdoor air can be filtered, and harmful impurities and harmful gases, such as PM2. Secondary pollution, to ensure people's health, and, also can add gac in filter screen 40, to filter harmful gases such as formaldehyde, benzene, ammonia in the air.

In one embodiment of the present invention, preferably, as shown in FIGS. 4 to 6 and 8 to 10 , the second indoor unit 30 further includes: at least one second air inlet 326 disposed on the housing 32 , It communicates with the indoor environment, and the airflow entering the casing 32 from the second air inlet 326 passes through the heat exchanger 38 and then enters the fan 36; at least one switch 42 is respectively arranged on at least one second air inlet 326 for Open or close the second air inlet 326; the baffle plate 44 is arranged on one side of the filter screen 40 and is connected with the filter screen 40. The baffle plate and the filter screen 40 are movably arranged in the housing 32, and the baffle plate is used to open or Close the first air inlet 324; the driving device is connected with the baffle plate 44 and/or the filter screen 40, and is used to drive the baffle plate 44 and the filter screen 40 to move; wherein, the driving device drives the filter screen 40 and the baffle plate 44 to make the filter screen The net 40 is compatible with the first air inlet 324, and when the first air inlet 324 was opened, the switch 42 closed the second air inlet 326; Correspondingly, when the first air inlet 324 is closed, the switch 42 opens the second air inlet 326 .

In this embodiment, by setting the second air inlet 326 on the housing 32 of the second indoor unit 30, the indoor air is internally circulated, so that the second indoor unit 30 has dual modes of external circulation and internal circulation, which improves the performance of the air conditioner. 1 scope of application. Specifically, when the second indoor unit 30 adopts the external circulation mode, the baffle 44 is driven away from the first air inlet 324 by the driving device, and the first air inlet 324 is blocked by the filter screen 40 to realize filtering of outdoor air, and, The switch 42 is closed to block the second air inlet 326, so as to prevent indoor air from entering the housing 32 and ensure the quality of fresh air; on the contrary, when the second indoor unit 30 adopts the internal circulation mode, the filter screen 40 is driven by the driving device to separate from the first An air inlet 324, the first air inlet 324 is blocked by the baffle plate 44 to prevent outdoor air from entering the room, and the switch 42 is opened to open the second air inlet 326 to realize the internal circulation of indoor air for heat exchange and ensure heat exchange efficiency. Wherein, preferably, the second air inlet 326 is provided on the top and both sides of the casing 32 .

In an embodiment of the present invention, optionally, the driving device is a first motor.

In this embodiment, the first motor drives the movement of the baffle 44 and the filter 40 to realize the automatic control of the baffle 44 and the filter 40 .

In another embodiment of the present invention, optionally, the moving device is a telescopic rod.

In this embodiment, the movement of the baffle plate 44 and the filter screen 40 is driven by the telescopic rod to realize the automatic control of the baffle plate 44 and the filter screen 40 .

In one embodiment of the present invention, preferably, the second indoor unit 30 further includes: an air quality detection device, arranged on the outer wall of the casing 32, for detecting the air quality in the indoor environment; wherein, when the indoor ambient air quality exceeds In the preset range, the first air inlet 324 is opened, and the second air inlet 326 is closed.

In this embodiment, the indoor air quality is detected by the air quality detection device. When the indoor ambient air quality exceeds the preset range, the first air inlet 324 will be opened, and the second air inlet 326 will be closed to perform external circulation; When the indoor ambient air quality does not exceed the preset range, the first air inlet 324 is closed, the second air inlet 326 is opened, and internal circulation is carried out. Since the temperature of the indoor air is relatively average, and the temperature difference of the outdoor air is large, and then for Different circulation methods are used in different situations, which avoids unnecessary energy consumption and realizes energy saving and environmental protection.

In a specific embodiment, an air quality detection device may also be provided at the second air inlet 326 .

In one embodiment of the present invention, preferably, the second indoor unit 30 further includes: a temperature detection device, arranged in the air duct 34, for detecting the outdoor ambient temperature and the indoor ambient temperature; When transporting air, when the temperature detection device detects that the temperature difference between the outdoor ambient temperature and the indoor ambient temperature is greater than or equal to the preset temperature difference, the heat exchanger 38 works to adjust the temperature difference between the temperature of the airflow passing through the heat exchanger 38 and the indoor ambient temperature to less than Preset temperature difference.

In this embodiment, the temperature difference between the outdoor temperature and the indoor temperature is detected by the temperature detection device, and when the second indoor unit 30 adopts the external cycle operation, it is first judged whether the temperature difference between the outdoor air temperature and the air temperature is less than the preset temperature When the temperature difference between the outdoor air temperature and the air temperature is greater than or equal to the preset temperature difference, the compressor works, and the heat exchanger 38 adjusts the outdoor air so that the temperature difference between the fresh air and the indoor air is less than the preset temperature difference. Set the temperature difference to ensure the comfort of the indoor environment temperature; when the temperature difference between the outdoor air temperature and the air temperature rains and the preset temperature difference, the compressor works, the heat exchanger 38 does not adjust the temperature of the fresh air, and the fresh air directly passes through the fan 36 to avoid unnecessary energy consumption, to achieve energy saving and environmental protection.

In a specific embodiment, the temperature detection device can also be arranged at the first air inlet 324 .

In one embodiment of the present invention, preferably, as shown in Fig. 3, Fig. 4, Fig. 6 to Fig. 8, and Fig. 10, the second indoor unit 30 further includes: a wind deflector 46, which can be opened and closed at the outlet There are 322 outlets.

In this embodiment, the user can independently adjust the rotation angle of the wind deflector 46 through the remote control, so as to obtain the wind outlet direction desired by the user.

In one embodiment of the present invention, preferably, as shown in FIGS. 4 to 6 and 8 to 10 , the air duct 34 is a round pipe, and the outer diameter of the air duct 34 is less than or equal to 75 mm.

In this embodiment, by setting the outer diameter of the cylindrical air duct 34 to be less than or equal to 75 mm, the noise generated when the air flow passes through the air duct 34 is reduced, noise pollution is avoided, and user experience is improved. .

In one embodiment of the present invention, preferably, as shown in Fig. 4, Fig. 5, Fig. 8, Fig. 9, fan 36 comprises: multi-blade centrifugal air duct 362; impeller 364, is arranged in multi-blade centrifugal air duct 362 ; The second motor 366 is connected with the impeller 364 for driving the impeller 364 to rotate.

In this embodiment, the air supply distance of the centrifugal fan 36 is long, therefore, the second indoor unit 30 can send the temperature-regulated air to The farther position of the room increases the speed of air circulation and speeds up the adjustment of the temperature of the indoor environment.

In an embodiment of the present invention, preferably, the second motor 366 is controlled by constant frequency and multiple gears.

In this embodiment, the production cost of the air conditioner 1 is reduced by controlling the second motor 366 at a constant frequency. For example, three gears are used for control, namely strong wind gear, medium wind gear, and weak wind gear; two gears are used for strong wind gear and weak wind gear respectively.

In an embodiment of the present invention, preferably, the ratio of the cooling capacity distributed by the outdoor unit 10 to the first indoor unit 20 and to the second indoor unit 30 is in a range of greater than or equal to 0.5 and less than or equal to 3.

In this embodiment, by setting the value range of the ratio of the cooling capacity distributed from the outdoor unit 10 to the first indoor unit 20 and to the second indoor unit 30 to be greater than or equal to 0.5 and less than or equal to 3, it is ensured that the first indoor The cooling capacity configuration of the air conditioner 20 is relatively small. After the air conditioner 1 is running at full speed for rapid temperature adjustment, when the air conditioner 1 is operating at a low frequency, the compressor and the fan 36 are still at a higher efficiency point, so as to avoid the compressor operating at an excessively low frequency, or Fan 36 adopts the technical effect of running at too low a rotational speed. Wherein, preferably, the range of the ratio of cooling capacity distributed by the outdoor unit 10 to the first indoor unit 20 and to the second indoor unit 30 is greater than or equal to 1 and less than or equal to 2.

In one embodiment of the present invention, preferably, the first indoor unit 20 includes: a cross-flow fan, and the cross-flow fan adopts frequency conversion control.

In this embodiment, the first indoor unit 20 realizes the circulation of indoor air through the cross-flow fan controlled by frequency conversion, so that the air flow and wind speed are evenly distributed, and the speed of adjusting the indoor environment temperature is accelerated.

Of course, in specific embodiments, the first indoor unit 20 may also use other types of fans to perform air circulation.

The present invention provides an air conditioner 1. As shown in FIG. 1 and FIG. 2, the indoor unit is divided into a first indoor unit 20 and n (1≤n≤3) second indoor units 30, using the one-to-many technology, Utilize the outdoor unit 10 of an air conditioner 1 to carry out cooling distribution control, and each indoor unit can operate independently to complete various tasks. The first indoor unit 20 pays attention to indoor temperature regulation and maintenance, adopts the design of the cross-flow air duct system, and its maximum cooling capacity is 1/2 to 2/3 of the maximum cooling capacity of the entire air conditioning system; the second indoor unit 30 can complete auxiliary temperature adjustment, Indoor air circulation, introduction of fresh air and temperature adjustment of fresh air, etc., adopt the multi-blade centrifugal air duct 362 system design, and one to three can be installed according to the room area and layout, and the maximum cooling capacity is 1% of the maximum cooling capacity of the entire system /3 to 1/2.

In this embodiment, the second indoor unit 30 has two operating states, including: the fresh air external circulation state and the internal circulation state, and four operating modes, including single-opening fresh air mode, fresh air temperature adjustment mode, single temperature adjustment mode, and delivery mode. Wind mode, which cooperates with the first indoor unit 20 to form a variety of airflow organization forms:

1. When the temperature difference between the indoor temperature and the set temperature of the air conditioner 1 is large, for example, when the temperature needs to be raised/cooled rapidly when starting up the machine, the first indoor unit 20 turns on the maximum cooling capacity and the highest wind mode, and the second indoor unit 30 turns on Single temperature adjustment, maximum cooling capacity and maximum wind mode, because the second indoor unit 30 adopts the centrifugal fan 36, the air supply distance is long, the air after temperature adjustment can be sent to the room farther, and the air circulation speed is improved. The indoor unit in the technology can achieve the purpose of faster cooling.

2. After the temperature reaches the set temperature, the second indoor unit 30 can be completely closed or the air supply mode can be turned on, and the first indoor unit 20 continues to operate to maintain the indoor temperature. Since the cooling capacity of the first indoor unit 20 is smaller than that of the related art indoor unit, Therefore, the variation range of the fan speed is small, which is beneficial to make the fan run at a higher efficiency point.

3. After running in a closed environment for a period of time, you can turn on the fresh air mode to send fresh air into the room for air quality adjustment; if the temperature difference between the outdoor and indoor temperature is large, you can control the distribution capacity of the compressor to the auxiliary machine again at this time to make the fresh air After passing through the heat exchanger 38, it is adjusted to have no obvious temperature difference with the room (the temperature difference is less than 3 degrees Celsius), and the fresh air temperature adjustment mode is turned on.

In one embodiment of the present invention, the air conditioner 1 system includes: an outdoor unit 10 , a first indoor unit 20 , and a second indoor unit 30 . The entire air-conditioning system is regulated by frequency conversion one-to-two technology, and the first indoor unit 20 and the second indoor unit 30 can work independently or jointly. The first indoor unit 20 and the second indoor unit 30 are respectively installed on the top of the indoor wall in the same room, and the height is the same as that of the split type air conditioner 1 in the related art. The second indoor unit 30 needs to be installed on the outer wall and needs to The hole on the wall, the diameter D of the hole is designed according to the fresh air volume and noise requirements, wherein, preferably, D≤75mm.

The outdoor unit 10 and the first indoor unit 20 are equivalent to the household air conditioner design in the related art, and the second indoor unit 30 includes: a second motor 366, a high-pressure centrifugal wind wheel and its volute, a heat exchanger 38 and its supporting components. Sealing plate, detachable, high-removal HEPA filter screen 40 and the supporting baffle plate 44 that can slide up and down with the HEPA filter screen 40, pass through the air duct 34 that communicates with the outdoors on the wall, and have a second filter screen on three sides. The housing 32 of the air inlet 326, the opening and closing door 1, the opening and closing door 2, and the opening and closing door 3 that can realize 90-degree rotation respectively with the second air inlet 326 on three sides, and a wind deflector 46 that can adjust the wind direction.

The fresh air operation mode of the second indoor unit 30, at this time, the opening and closing doors one to three are respectively rotated to the positions parallel to the side walls of the housing 32, respectively covering the second air inlets 326 on three sides, so that the indoor air cannot enter the second room. In the machine 30 system; the HEPA filter screen 40 slides to the first air inlet 324, and the centrifugal fan 36 starts to filter the outdoor air through the HEPA screen, then enters the centrifugal fan 36 through the heat exchanger 38 to accelerate pressurization, and passes through the air outlet 322 Sending into the room, at this moment, select whether to allow the compressor to deliver the capacity to the second indoor unit 30 according to the outdoor ambient temperature to adjust the temperature of the fresh air. The fresh air entering the room will form a local slight positive pressure indoors, so that the original indoor low-quality air will be excluded from the outside through the door and window cracks.

The temperature adjustment, air supply, and air circulation modes of the second indoor unit 30. At this time, the switch door one to three rotates to a position perpendicular to the wall of the housing where it is located, and the second air inlets 326 on three sides are opened, and the indoor air can enter the second indoor unit. 30 system, at the same time, the HEPA filter 40 slides down until the baffle 44 completely blocks the air duct 34 and the first air outlet 322, the outdoor fresh air will not enter the room, and the airflow mode of the second indoor unit 30 is changed from fresh air external circulation to Internal circulation, at this time, it can be selected according to the current usage scenario whether to allow the compressor to deliver capacity to the second indoor unit 30 .

In a specific embodiment, the air conditioner 1 includes: an outdoor unit 10 capable of distributing and delivering capacities to the first indoor unit 20 and the second indoor unit 30 respectively. A first indoor unit adopts the traditional cross-flow air duct design, and the length of the wind wheel is smaller than that of the indoor unit of the air conditioner 1 in the related art. The specific length is determined by the length and arrangement of the heat exchanger. The motor is a DC motor with frequency conversion Technical model control, providing about 2/3 of the total cooling capacity of the air conditioner 1 in the state of rapid cooling; in the state of maintaining the indoor ambient temperature, it is responsible for controlling the change of the indoor ambient temperature to ensure that the indoor temperature change is within ±0.5 degrees Celsius. The second indoor unit 30 adopts a fixed-frequency motor controlled by two gears. The two gears of speed are set according to the fresh air volume when one person and two people are in the room respectively. In the fast cooling state, it is responsible for providing the rest of the total cooling capacity; state, you can choose to close it completely, or choose the air supply mode to improve the circulation of indoor air; when air quality adjustment is required, use three switch 42 devices to isolate the second air inlet 326 in the room, and move the filter screen 40 and baffle 44 The device opens the first air inlet 324 for the fresh air supply, completes the transition from the internal circulation mode to the fresh air external circulation mode, and selects whether the fresh air needs to be refrigerated or heated according to the temperature difference between indoor and outdoor.

Wherein, the heat exchanger 38 divides the housing 32 into two cavities in the housing 32, a fan 36 and an air outlet 322 are arranged in one cavity, and a baffle plate 44, a filter screen 40, a first The air inlet 324 and the second air inlet 326 .

Fig. 11 shows a flow chart of the control method of the air conditioner provided by the embodiment of the second aspect of the present invention.

As shown in Fig. 11, the control method of the air conditioner provided by the embodiment of the second aspect of the present invention includes:

Step 1102, when the temperature difference between the indoor temperature and the preset temperature is greater than or equal to the first preset temperature difference, the first indoor unit and the second indoor unit simultaneously carry out air supply and temperature adjustment in the room in an internal circulation mode, so that the indoor temperature is consistent with the preset temperature. The temperature difference between the preset temperatures is smaller than the first preset temperature difference;

Step 1104, when the temperature difference between the indoor temperature and the preset temperature is smaller than the first preset temperature difference, the second indoor unit turns off the temperature adjustment function;

Step 1106, detecting the indoor air quality;

Step 1108, judging whether the indoor air quality exceeds the preset range, if the judgment result is yes, execute step 1110; when the judgment result is no, re-execute step 1106, and re-test the indoor air quality;

Step 1110, the second indoor unit turns on the external circulation function to deliver outdoor air to the room, so that the indoor air quality is within a preset range.

In the control method of the air conditioner provided by the present invention, the preset temperature is set in advance, and when the temperature difference between the indoor temperature and the preset temperature is greater than or equal to the first preset temperature difference, the first indoor unit and the second indoor unit simultaneously use full power to The indoor temperature is adjusted and the air is supplied so that the indoor temperature quickly reaches the preset temperature. After the temperature difference between the indoor temperature and the preset temperature is adjusted to be less than the first preset temperature difference, the second indoor unit turns off the temperature adjustment function , and detect the indoor air quality. When the detected indoor air quality exceeds the preset range, the second indoor unit will start the external circulation function to deliver the outdoor air to the room to improve the indoor air quality so that the indoor air quality Within the preset range, the air conditioner quickly adjusts the indoor ambient temperature, and ensures the quality of the indoor air and people's health.

Fig. 12 shows a flow chart of an air conditioner control method provided by another embodiment in the embodiment of the second aspect of the present invention.

As shown in Figure 12, another embodiment of the second aspect of the present invention provides an air conditioner control method including:

Step 1202, when the temperature difference between the indoor temperature and the preset temperature is greater than or equal to the first preset temperature difference, the first indoor unit and the second indoor unit simultaneously carry out air supply and temperature adjustment in the room in an internal circulation mode, so that the indoor temperature is consistent with the preset temperature. The temperature difference between the preset temperatures is smaller than the first preset temperature difference;

Step 1204, when the temperature difference between the indoor temperature and the preset temperature is smaller than the first preset temperature difference, the second indoor unit turns off the temperature adjustment function and turns off the air supply function; or the second indoor unit turns off the temperature adjustment function and keeps the air supply function. wind function;

Step 1206, detecting the content of impurities in the indoor air and the content of harmful gases in the indoor air;

Step 1208, judge whether any of the impurity content in the indoor air and the harmful gas content in the indoor air exceeds the preset range, if the judgment result is yes, execute step 1210; when the judgment result is no, re-execute step 1206, and re- Indoor air quality testing;

Step 1210, detecting the temperature of the outdoor air;

Step 1212, judging that the temperature difference between the temperature of the outdoor air and the indoor temperature is greater than or equal to the second preset temperature difference, when the judging result is yes, go to step 1216; when the judging result is no, go to step 1214;

Step 1214, the second indoor unit turns on the external circulation function to deliver the outdoor air to the room, so that the impurity content in the indoor air and the harmful gas content in the indoor air are within a preset range;

Step 1216, the second indoor unit adjusts the temperature of the outdoor air so that the temperature difference between the temperature of the outdoor air and the indoor temperature is less than the second preset temperature difference, and then transports the outdoor air to the room so that the impurity content in the indoor air The content of harmful gases in the indoor air is within the preset range.

In the control method of the air conditioner provided by the present invention, the preset temperature is set in advance, and when the temperature difference between the indoor temperature and the preset temperature is greater than or equal to the first preset temperature difference, the first indoor unit and the second indoor unit simultaneously use full power to The indoor temperature is adjusted and the air is supplied to make the indoor temperature quickly reach the preset temperature. After the temperature difference between the indoor temperature and the preset temperature is adjusted to be less than the first preset temperature difference, according to the user's choice, the second indoor The second indoor unit turns off the temperature adjustment function and the air supply function; or the second indoor unit turns off the temperature adjustment function and maintains the air supply function, and detects the impurity content in the air and the harmful gas content in the indoor air, such as PM2.5 or carbon dioxide, etc. If any of the above two exceeds the standard, the second indoor unit will open the external circulation to introduce the outdoor air into the room, so as to improve the air quality of the indoor environment.

Wherein, preferably, the air quality detection device detects the content of PM2.5 and carbon dioxide in the indoor air. Specifically, the allowable content of PM2.5 is less than 35 milligrams per cubic meter; the allowable content of carbon dioxide is less than 1100PPM, when the content of PM2.5 reaches or exceeds 35 milligrams per cubic meter and/or the content of carbon dioxide reaches or exceeds At 1100PPM, the second indoor unit activates the external circulation function to introduce outdoor fresh air into the room.

In an embodiment of the present invention, preferably, the second preset temperature difference is 3 degrees Celsius.

In a specific embodiment, after judging that the temperature difference between the temperature of the outdoor air and the indoor temperature is greater than or equal to the second preset temperature difference, then judging the magnitude relationship between the temperature of the outdoor air and the indoor temperature to determine the heat transfer The appliance is in cooling mode or heating mode.

In a specific embodiment, the outer circulation function can also be started by timing.

To sum up, the air conditioner 1 provided by the present invention, on the one hand, adjusts the indoor temperature by setting multiple indoor units in the same room, so that multiple temperature adjustment points appear in the same room, so that the first indoor unit 20 The cooling capacity allocation is reduced. Therefore, after the air conditioner is running at full capacity for rapid temperature adjustment, the compressor and fan are still at a higher efficiency point when operating at a low frequency. Low speed operation, thereby reducing the energy consumption of the air conditioner 1; In addition, the first indoor unit 20 and the second indoor unit 30 are simple in structure and small in size.

In the control method of the air conditioner provided by the present invention, the preset temperature is set in advance, and when the temperature difference between the indoor temperature and the preset temperature is greater than or equal to the first preset temperature difference, the first indoor unit and the second indoor unit simultaneously use full power to The indoor temperature is adjusted and the air is supplied so that the indoor temperature quickly reaches the preset temperature. After the temperature difference between the indoor temperature and the preset temperature is adjusted to be less than the first preset temperature difference, the second indoor unit turns off the temperature adjustment function , and detect the indoor air quality. When the detected indoor air quality exceeds the preset range, the second indoor unit will start the external circulation function to deliver the outdoor air to the room to improve the indoor air quality so that the indoor air quality Within the preset range, the air conditioner quickly adjusts the indoor ambient temperature, and ensures the quality of the indoor air and people's health.

In the present invention, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance. The terms "installed", "connected", "connected", "fixed", etc. The terms should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the description of this specification, descriptions of the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in the present invention In at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (14)

1. A kind of 1. air conditioner, it is characterised in that including：

   Outdoor unit；

   First indoor set, it is connected with the outdoor unit, for regulating and controlling indoor environment temperature；

   At least one second indoor set, same interior is arranged on first indoor set, is connected with the outdoor unit, and with Outdoor environment is connected, for indoor conveying outdoor air with regulation and control indoor environment temperature；

   Second indoor set includes：

   Housing, is provided with the first air inlet and air outlet on the housing, and the air outlet is towards indoor；

   Blower fan, it is arranged in the housing, the air side of the blower fan is towards the air outlet；

   Heat exchanger, it is arranged in the housing, between first air inlet and the inlet side of the blower fan；

   Wherein, by first air inlet enter the housing air-flow after the heat exchanger, into the blower fan.
2. 2. air conditioner according to claim 1, it is characterised in that second indoor set also includes：

   Airduct, one end are connected with first air inlet, and the other end is connected to outdoor environment.
3. 3. air conditioner according to claim 2, it is characterised in that second indoor set also includes：

   Filter screen, first air inlet is arranged on, for filtering impurity and/or pernicious gas in outdoor air.
4. 4. air conditioner according to claim 3, it is characterised in that second indoor set also includes：

   At least one second air inlet, set on the housing, be connected with indoor environment, and entered by second air inlet Enter the air-flow of the housing by entering the blower fan after heat exchanger；

   At least one switch, it is separately positioned at least one second air inlet, enters for being turned on and off described second Air port；

   Baffle plate, be arranged on the filter screen side, be connected with the filter screen, the baffle plate with the filter screen is mobilizable is arranged on In the housing, the baffle plate is used to be turned on and off first air inlet；

   Drive device, it is connected with the baffle plate and/or the filter screen, for driving the baffle plate to be moved with the filter screen；

   Wherein, the drive device drives the filter screen and the baffle plate, the filter screen is adapted with first air inlet, When first air inlet is opened, the switch closes second air inlet；

   The drive device drives the filter screen and the baffle plate, the baffle plate is adapted with first air inlet, described When first air inlet is closed, the switch opens second air inlet.
5. 5. air conditioner according to claim 4, it is characterised in that

   The drive device is the first motor or expansion link.
6. 6. air conditioner according to claim 4, it is characterised in that second indoor set also includes：

   Air quality detecting device, set on the housing, for detecting the air quality in indoor environment；

   Wherein, when the indoor air quality exceeds preset range, first air inlet is opened, second air intake Mouth is closed.
7. 7. the air conditioner according to any one of claim 2 to 6, it is characterised in that second indoor set also includes：

   Temperature-detecting device, set on the housing, for detecting outdoor environment temperature and indoor environment temperature；

   Wherein, when from outdoor environment to interior conveying air, the temperature-detecting device detects outdoor environment temperature and room When the temperature difference of interior environment temperature is more than or equal to fiducial temperature, the heat exchanger work, by temperature of the air-flow after the heat exchanger The temperature difference of degree and the indoor environment temperature is adjusted to less than the fiducial temperature.
8. 8. the air conditioner according to any one of claim 2 to 6, it is characterised in that

   The blower fan includes：

   Multi-wing centrifugal air channel；

   Impeller, it is arranged in the multi-wing centrifugal air channel；

   Second motor, it is connected with the impeller, for driving the impeller to rotate.
9. 9. air conditioner according to any one of claim 1 to 6, it is characterised in that

   The ratio span of cold of the outdoor unit to first indoor set with being distributed to second indoor set is big In equal to 0.5, and less than or equal to 3.
10. 10. air conditioner according to any one of claim 1 to 6, it is characterised in that first indoor set includes：

    Cross flow fan, the cross flow fan use VFC.
11. 11. a kind of control method of air conditioner, for air conditioner, the air conditioner includes, the first indoor set and the second indoor set； First indoor set has an interior circulatory function, and machine has interior circulatory function and outer circulation function in the second Room；Described Temperature sensor is provided with two indoor sets, for detecting outside air temperature；And air quality detecting device, for detecting IAQ, it is characterised in that the control method includes：

    When the temperature difference between indoor temperature and preset temperature is more than or equal to the first preset temperature difference, first indoor set and institute The second indoor set is stated with inner loop mode while interior is blown and temperature adjustment, make the indoor temperature with it is described default It is poor that temperature difference between temperature is less than first preset temperature；

    When the temperature difference between the indoor temperature and the preset temperature is less than the first preset temperature difference, described second Indoor set closing temperature regulatory function, and IAQ is detected；

    When the IAQ detected exceeds preset range, second indoor set opens outer circulation function, will Outdoor air is delivered to interior, so that the IAQ is in the preset range.
12. 12. the control method of air conditioner according to claim 11, it is characterised in that also include：

    When second indoor set opens outer circulation function, when the outdoor air is delivered into interior, detection is described outdoor empty The temperature of gas；

    When the temperature difference between the temperature and the indoor temperature of the outdoor air is more than or equal to the second preset temperature difference, institute The second indoor set is stated the temperature of the outdoor air is adjusted, make the temperature of the outdoor air and the indoor temperature it Between temperature difference be less than the second preset temperature it is poor.
13. 13. the control method of the air conditioner according to claim 11 or 12, it is characterised in that office closes in the second Room Temp regulating function specifically includes：

    Office closes temp regulating function in the second Room, closes air blowing function；Or

    Office closes temp regulating function in the second Room, keeps air blowing function.
14. 14. the control method of the air conditioner according to claim 11 or 12, it is characterised in that described to IAQ Detection is carried out to specifically include：

    Impurity content in the room air is detected；And/or

    Pernicious gas content in the room air is detected；

    Wherein, in the room air in impurity content and the room air at least one of in pernicious gas content beyond described Preset range, second indoor set open outer circulation function.