CN112797499B - Raise boring machine and control method thereof - Google Patents
Raise boring machine and control method thereof Download PDFInfo
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- CN112797499B CN112797499B CN202110050991.4A CN202110050991A CN112797499B CN 112797499 B CN112797499 B CN 112797499B CN 202110050991 A CN202110050991 A CN 202110050991A CN 112797499 B CN112797499 B CN 112797499B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a courtyard machine and a control method thereof, wherein the courtyard machine comprises: a fan; at least two air outlets; and the at least two heat exchangers are arranged in one-to-one correspondence with the air outlets, and each heat exchanger is positioned between the air outlet corresponding to the heat exchanger and the fan and used for adjusting the air outlet temperature of each air outlet. The invention solves the problem that different air outlets can not realize independent air outlet temperature control in the prior art, and realizes the independent air sweeping control in the real sense.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a courtyard machine and a control method thereof.
Background
The courtyard machine belongs to the mature application of the air conditioner field, the independent air sweeping mode of the courtyard machine is mature, but in the independent air sweeping control process, the temperature of each air outlet cannot be controlled, and the real independent control is not achieved. Moreover, due to the condensation problem, the air sweeping guide plate cannot be closed for a long time, and the air sweeping guide plate needs to be controlled to be opened discontinuously.
Aiming at the problem that independent air outlet temperature control cannot be realized at different air outlets of the courtyard unit in the related art, an effective solution is not provided at present.
Disclosure of Invention
The invention provides a courtyard machine and a control method thereof, which at least solve the problem that different air outlets of the courtyard machine in the prior art cannot realize independent air outlet temperature control.
To solve the above technical problem, according to an aspect of an embodiment of the present invention, there is provided a raise boring machine including: a fan; at least two air outlets; and the at least two heat exchangers are arranged in one-to-one correspondence with the air outlets, and each heat exchanger is positioned between the air outlet corresponding to the heat exchanger and the fan and used for adjusting the air outlet temperature of each air outlet.
Further, the heat exchanger includes: a refrigerant inlet and a refrigerant outlet; the courtyard machine still includes: and the at least two electronic expansion valves are arranged in one-to-one correspondence with the heat exchanger, are positioned at the refrigerant inlet and are used for adjusting the liquid supply flow of the heat exchanger.
Further, still include: the at least two heat exchanger inlet temperature sensing bags are positioned between the electronic expansion valve and the refrigerant inlet and are used for detecting the inlet temperature of the heat exchanger; and the at least two heat exchanger outlet temperature sensing bags are positioned at the refrigerant outlet and used for detecting the outlet temperature of the heat exchanger.
Further, still include: the air deflectors are arranged in one-to-one correspondence with the air outlets; wherein, the air-out direction of aviation baffle is towards the outside of courtyard machine.
According to another aspect of the embodiment of the invention, there is provided a raise boring machine control method, which is applied to the raise boring machine, and comprises: detecting the operation mode of the raise boring machine; controlling the switch of the air deflector according to the operation mode; and acquiring the superheat degree of the heat exchanger, and controlling the opening degree of the electronic expansion valve according to the superheat degree.
Further, the operation mode includes at least: a unified control mode and an individual control mode; controlling a switch of an air deflection plate according to an operation mode, comprising: when the operation mode is the unified control mode, controlling each air deflector to be opened to a preset opening degree; and when the operation mode is the single control mode, sequentially controlling the air deflectors to be opened, or controlling all the air deflectors to be opened.
Further, when the operation mode is the unified control mode, the superheat degree of the heat exchanger is obtained, and the opening degree of the electronic expansion valve is controlled according to the superheat degree, and the method comprises the following steps: obtaining the superheat degree of any heat exchanger; wherein, the superheat degree of the heat exchanger is equal to the outlet temperature of the heat exchanger-the inlet temperature of the heat exchanger; and determining the corresponding opening degree of the electronic expansion valve according to the superheat degree of any one heat exchanger, and controlling each electronic expansion valve according to the corresponding opening degree.
Further, when the operation mode is the single control mode, the superheat degree of the heat exchanger is obtained, and the opening degree of the electronic expansion valve is controlled according to the superheat degree, and the method further comprises the following steps: after the first air deflector is opened, controlling other air deflectors to be closed; the heat exchanger corresponding to the first air deflector is a first heat exchanger; acquiring a first superheat degree of the first heat exchanger, and controlling the opening degree of an electronic expansion valve of the first heat exchanger according to the first superheat degree; and acquiring the indoor environment temperature and the set temperature, determining a second superheat degree according to the difference value of the indoor environment temperature and the set temperature, and controlling the opening degrees of the electronic expansion valves corresponding to the other air deflectors according to the second superheat degree.
Further, controlling the other air deflectors to close includes: controlling other air deflectors to adjust to a preset angle; after the other air deflectors maintain the preset angle for a first preset time, controlling the other air deflectors to adjust to the minimum angle; and after the other air deflectors maintain the minimum angle for a second preset time, controlling the other air deflectors to be closed.
Further, after controlling other aviation baffles to close, still include: detecting the closing time of other air deflectors; and controlling the electronic expansion valves corresponding to the other air deflectors to close after the closing time is greater than the third preset time.
Further, before detecting the closing time of the other air deflectors, the method further comprises the following steps: and determining a third preset time according to the angle of the first air deflector.
Further, after the first aviation baffle is opened, still include: determining the opening time of the second air deflector according to the angle of the first air deflector; controlling the second air deflector to be opened to the maximum opening according to the opening time; the heat exchanger corresponding to the second air deflector is a second heat exchanger; and after the second air deflector maintains the maximum opening degree for a fourth preset time, controlling the opening degree of the electronic expansion valve of the second heat exchanger according to the superheat degree of the second heat exchanger.
According to a further aspect of embodiments of the present invention there is provided a storage medium containing computer executable instructions which, when executed by a computer processor, are for performing the patio control method as described above.
The invention provides a multi-surface air-out type courtyard machine, which can be used for independently controlling air sweeping and setting a temperature requirement value according to the selection of a user through an independently controlled heat exchanger. Above-mentioned design adopts different heat exchangers to carry out the regulation of air-out temperature to different air outlets, mutual noninterference realizes the independent control of sweeping wind in the true sense.
Drawings
FIG. 1 is a schematic diagram of an alternative external configuration of a raise rig according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of an alternative internal construction of a raise boring machine according to an embodiment of the present invention;
fig. 3 is a schematic view of an alternative wind outlet angle of the wind deflector according to the embodiment of the invention;
FIG. 4 is an alternative flow diagram of a patio control method according to an embodiment of the present disclosure;
FIG. 5 is an alternative flow diagram of a unified control scheme according to an embodiment of the invention;
fig. 6 is an alternative flow diagram of the independent control mode according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example 1
In a preferred embodiment 1 of the present invention there is provided a raise boring machine, in particular comprising:
a fan;
at least two air outlets;
and the at least two heat exchangers are arranged in one-to-one correspondence with the air outlet, are positioned between the fan and the air outlet and are used for adjusting the air outlet temperature of the air outlet.
Fig. 1 shows an alternative external structure schematic diagram of the raise boring machine, as shown in fig. 1, the raise boring machine includes two air outlets, two air deflectors F1 and F2 are correspondingly provided, and an air inlet 1 is provided in the middle of the air outlets. Of course, a plurality of air outlets, for example, 4 air outlets, may be provided, and the air outlets are provided in one-to-one correspondence with the heat exchanger and the air guide plate, and the number of the air outlets is the same.
In the above embodiment, a multi-surface air-out type raise crane is provided, and through the independently controlled heat exchanger, the temperature requirement value can be independently controlled and set according to the selection of the user. Above-mentioned design adopts different heat exchangers to carry out the regulation of air-out temperature to different air outlets, mutual noninterference realizes the independent control of sweeping wind in the true sense.
Fig. 2 shows an alternative structural schematic diagram of the internal structure of the raise machine, as shown in fig. 2, corresponding to the air outlet and the air deflector, and including a heat exchanger a and a heat exchanger B. When the number of the air outlets is two, the two heat exchangers are U-shaped heat exchangers as shown in the figure. The fan is located one side of heat exchanger, and the aviation baffle is located the opposite side of heat exchanger. The heat exchanger includes: a refrigerant inlet 3 and a refrigerant outlet 2; an electronic expansion valve is arranged at the inlet of the refrigerant and used for adjusting the liquid supply flow of the heat exchanger.
In addition, the raise boring machine further comprises: the at least two heat exchanger inlet temperature sensing bags are positioned between the electronic expansion valve and the refrigerant inlet and are used for detecting the inlet temperature of the heat exchanger; and the at least two heat exchanger outlet temperature sensing bags are positioned at the refrigerant outlet and used for detecting the outlet temperature of the heat exchanger. Fig. 2 shows the inlet temperature sensing bulbs T1, T2 of the two heat exchangers, and the outlet temperature sensing bulb may be a single bulb T3.
Fig. 3 also shows a schematic view of an air outlet angle of the air deflector, the maximum opening angle of the air deflector is 85 °, and the air outlet faces outward, so that the opening directions of the air deflectors F1 and F2 are opposite, and therefore, there is no interference between the air outlet and the air return opening, and the air outlet and the air return opening cannot affect each other.
In the multi-surface air-out type courtyard machine in the scheme, each air deflector is driven and controlled by a motor, the heat exchanger in the design scheme comprises two heat exchangers A and B which are respectively controlled by EER1 and EER2, the inlet and outlet pipes of the two heat exchangers are provided with temperature sensing bags, the heat exchangers are respectively controlled according to different temperature settings and different angles of the air deflectors of users, and the real independent air sweeping control is realized.
Example 2
In a preferred embodiment 2 of the present invention, there is provided a raise boring machine control method applied to the raise boring machine in the above embodiment 1. In particular, fig. 4 shows an alternative flow chart of the method, which, as shown in fig. 4, comprises the following steps S402-S406:
according to another aspect of the embodiment of the invention, there is provided a raise boring machine control method, which is applied to the raise boring machine, and comprises:
s402: detecting the operation mode of the raise boring machine;
s404: controlling the switch of the air deflector according to the operation mode;
s406: and acquiring the superheat degree of the heat exchanger, and controlling the opening degree of the electronic expansion valve according to the superheat degree.
In the above embodiment, a multi-surface air-out type raise crane is provided, and through the independently controlled heat exchanger, the temperature requirement value can be independently controlled and set according to the selection of the user. Above-mentioned design adopts different heat exchangers to carry out the regulation of air-out temperature to different air outlets, mutual noninterference realizes the independent control of sweeping wind in the true sense.
The operation mode of the raise boring machine at least comprises the following steps: a unified control mode and an individual control mode; controlling a switch of an air deflection plate according to an operation mode, comprising: when the operation mode is the unified control mode, controlling each air deflector to be opened to a preset opening degree; and when the operation mode is the single control mode, sequentially controlling the air deflectors to be opened, or controlling all the air deflectors to be opened.
When the operation mode is the unified control mode, the superheat degree of the heat exchanger is obtained, and the opening degree of the electronic expansion valve is controlled according to the superheat degree, and the method comprises the following steps: obtaining the superheat degree of any heat exchanger; wherein, the superheat degree of the heat exchanger is equal to the outlet temperature of the heat exchanger-the inlet temperature of the heat exchanger; and determining the corresponding opening degree of the electronic expansion valve according to the superheat degree of any one heat exchanger, and controlling each electronic expansion valve according to the corresponding opening degree.
Fig. 5 shows an alternative flow chart of the unified control mode, and as shown in fig. 5, the method includes the following steps S502-S506:
s502: entering a unified control mode;
s504: the angles of F1 and F2 are opened according to the setting;
s506: the opening degree of the electronic expansion valve is controlled according to the degree of superheat.
Fig. 6 shows an alternative flow chart of the independent control mode, and as shown in fig. 6, the method includes the following steps S602-S614:
s602: entering an independent control mode; and sequentially controlling the air deflectors to be opened, or controlling all the air deflectors to be opened.
Control each aviation baffle according to the order and open in proper order, include:
s604: f1 is turned on, and F2 is turned off;
s606: f2 adjusting the angle to 35 degrees, operating for 1min and adjusting to a closed state;
s608: EXV2 according to TMDAdjusting;
the independent control relates to the setting of the angle and the temperature requirement of the air deflector, after the independent air sweeping control is carried out, F1 or F2 needing to be set is selected, then the air guiding angle and the temperature option are set, and the unselected air outlet operates according to the current setting.
When one outlet is opened and the other outlet is closed (independent wind sweeping mode, at least one outlet is opened, other outlets can be closed), for example, F1 is opened, and when the air conditioner is in cooling/heating operation, F2 is set to be closed from an operation state, and when an F2 closing command is received, F2 immediately adjusts the angle to 35 degrees, and operates for 1min and adjusts the angle to be closed. Before closing, according to the degree of superheat TMDAdjusting the opening degree, T, of an electronic expansion valve EER2 of a heat exchanger BMDT3-T2. After closing, TMDAccording to the difference (T) between the ambient temperature and the set temperature of the indoor unitS) Making upAs shown in table one below.
Watch 1
| TS(℃) | ≤5 | 5＜TS≤10 | ＞10 |
| TMD(℃) | 10 | 7 | 5 |
F2 off time > H is detected after F2 is off2Indicating no use demand on side F2, adjust EER2 to close, H2The opening angle of the air guide vane is corrected according to F1, as shown in table two below.
Watch two
| F1(°) | ≤45 | 45＜F1≤60 | ＞60 |
| H2(min) | 15 | 20 | 25 |
The air conditioner is adjusted to be the minimum opening degree before the F2 is closed, the waste heat of the heat exchanger is reduced or condensation is prevented, the influence on the air outlet of the F1 due to the closing of the F2 is reduced, and the comfort of a user is improved.
The opening of the EER2 is controlled according to the superheat degree, firstly, the higher target superheat degree is ensured not to be condensed, when the difference value between the set temperature of a user and the ambient temperature is small, the current ambient temperature is close to the user requirement, the probability of opening the F2 again is small, the superheat degree is set to be larger, the corresponding opening of the EXV2 is smaller, the time for opening the F2 again can be judged according to the opening angle of the F1, and quick refrigeration can be realized when the opening is performed again.
When the F2 is adjusted to be opened from the closed state, the F2 is adjusted to be the maximum opening degree firstly, and the control is carried out according to the set angle after 1 min.
All the air deflectors are controlled to be opened, and the method comprises the following steps:
s610: f1 is turned on, and F2 is turned on;
s612: f1 and F2 adjust the angle according to the setting;
s614: EXV according to TM1、TM2And (6) adjusting.
EXV1 of F1 based on degree of superheat TM1Regulation of TM1EXV2 of F2 from T3 to T1 depending on the degree of superheat TM2Regulation of TM2＝T3-T2。
The invention relates to a multi-surface air-out type courtyard machine, which can realize independent outlet temperature control by adjusting the opening degree of a corresponding electronic expansion valve and setting a temperature requirement value according to independent air sweeping control selected by a user through an independently controlled heat exchanger, and simultaneously control the flow of a refrigerant of a corresponding heat exchanger through a heat exchanger inlet pipe temperature sensing bulb according to different opening angles of a guide vane so as to solve the condensation problem.
Example 3
Based on the patio control method provided in embodiment 2 above, there is also provided in a preferred embodiment 3 of the present invention a storage medium containing computer executable instructions for performing the patio control method as described above when executed by a computer processor.
In the above embodiment, a multi-surface air-out type raise crane is provided, and through the independently controlled heat exchanger, the temperature requirement value can be independently controlled and set according to the selection of the user. Above-mentioned design adopts different heat exchangers to carry out the regulation of air-out temperature to different air outlets, mutual noninterference realizes the independent control of sweeping wind in the true sense.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (11)
1. A raise boring machine, comprising:
a fan;
at least two air outlets;
the at least two heat exchangers are arranged in one-to-one correspondence with the air outlets, and each heat exchanger is positioned between the air outlet corresponding to the heat exchanger and the fan and used for adjusting the air outlet temperature of each air outlet;
the heat exchanger includes: a refrigerant inlet and a refrigerant outlet;
the raise boring machine further comprises: the at least two electronic expansion valves are arranged in one-to-one correspondence with the heat exchangers, are positioned at the refrigerant inlet and are used for adjusting the liquid supply flow of the heat exchangers;
the air deflectors are arranged in one-to-one correspondence with the air outlets; the air outlet direction of the air deflector faces the outer side of the courtyard machine;
the operation modes of the courtyard machine at least comprise an individual control mode, in the individual control mode, after a first air deflector is opened, other air deflectors are closed, the opening degree of an electronic expansion valve of the first heat exchanger is controlled according to a first superheat degree of the first heat exchanger corresponding to the first air deflector, and the opening degrees of the electronic expansion valves corresponding to the other air deflectors are controlled according to a second superheat degree determined by a difference value between the indoor environment temperature and a set temperature.
2. The raise machine of claim 1, further comprising:
the at least two heat exchanger inlet temperature sensing bags are positioned between the electronic expansion valve and the refrigerant inlet and are used for detecting the inlet temperature of the heat exchanger;
and the at least two heat exchanger outlet temperature sensing bags are positioned at the refrigerant outlet and used for detecting the outlet temperature of the heat exchanger.
3. A raise boring machine control method applied to the raise boring machine according to any one of claims 1 to 2, comprising:
detecting an operating mode of the raise boring machine;
controlling the switch of the air deflector according to the operation mode;
and acquiring the superheat degree of the heat exchanger, and controlling the opening degree of the electronic expansion valve according to the superheat degree.
4. Method according to claim 3, characterized in that said operating mode comprises at least: a unified control mode and an individual control mode; the switch for controlling the air deflector according to the operation mode comprises:
when the operation mode is the unified control mode, controlling each air deflector to be opened to a preset opening degree;
and when the operation mode is the single control mode, sequentially controlling the air deflectors to be opened, or controlling the air deflectors to be opened completely.
5. The method as claimed in claim 4, wherein obtaining a degree of superheat of the heat exchanger when the operation mode is the unified control mode, and controlling an opening degree of an electronic expansion valve according to the degree of superheat comprises:
obtaining the superheat degree of any heat exchanger; wherein, superheat of the heat exchanger = outlet temperature of the heat exchanger-inlet temperature of the heat exchanger;
and determining the corresponding opening degree of the electronic expansion valve according to the superheat degree of any one heat exchanger, and controlling each electronic expansion valve according to the corresponding opening degree.
6. The method as claimed in claim 4, wherein when the operation mode is the single control mode, a degree of superheat of the heat exchanger is acquired, and an opening degree of an electronic expansion valve is controlled based on the degree of superheat, further comprising:
after the first air deflector is opened, controlling other air deflectors to be closed; the heat exchanger corresponding to the first air deflector is a first heat exchanger;
acquiring a first superheat degree of the first heat exchanger, and controlling the opening degree of an electronic expansion valve of the first heat exchanger according to the first superheat degree;
and acquiring an indoor environment temperature and a set temperature, determining a second superheat degree according to a difference value of the indoor environment temperature and the set temperature, and controlling the opening degrees of the electronic expansion valves corresponding to the other air deflectors according to the second superheat degree.
7. The method of claim 6, wherein controlling the other louvers to close comprises:
controlling the other air deflectors to adjust to a preset angle;
after the other air deflectors maintain the preset angle for a first preset time, controlling the other air deflectors to adjust to a minimum angle;
and after the other air deflectors maintain the minimum angle for a second preset time, controlling the other air deflectors to be closed.
8. The method of claim 6, further comprising, after controlling the other louvers to turn off:
detecting the closing time of the other air deflectors;
and controlling the electronic expansion valves corresponding to the other air deflectors to be closed after the closing time is greater than a third preset time.
9. The method of claim 8, further comprising, prior to detecting the turn-off time of the other air deflection plates:
and determining the third preset time according to the angle of the first air deflector.
10. The method of claim 6, further comprising, after the first air deflection plate is opened:
determining the opening time of a second air deflector according to the angle of the first air deflector;
controlling the second air deflector to be opened to the maximum opening according to the opening time; the heat exchanger corresponding to the second air deflector is a second heat exchanger;
and after the second air deflector maintains the maximum opening degree for a fourth preset time, controlling the opening degree of an electronic expansion valve of the second heat exchanger according to the superheat degree of the second heat exchanger.
11. A storage medium containing computer executable instructions for performing the patio control method of any one of claims 3 to 10 when executed by a computer processor.
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| CN106907876A (en) * | 2017-02-21 | 2017-06-30 | 广东美的暖通设备有限公司 | Air-conditioning system and its evaporating temperature control method |
| CN106871241A (en) * | 2017-03-10 | 2017-06-20 | 珠海格力电器股份有限公司 | Courtyard machine |
| CN107023890A (en) * | 2017-04-17 | 2017-08-08 | 珠海格力电器股份有限公司 | Indoor set and two-side exhaust courtyard machine |
| CN108006920A (en) * | 2017-11-17 | 2018-05-08 | 珠海格力电器股份有限公司 | A kind of courtyard machine control method, device and courtyard machine |
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