CN113932296A - Novel refrigerating device and control method - Google Patents
Novel refrigerating device and control method Download PDFInfo
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- CN113932296A CN113932296A CN202111467628.9A CN202111467628A CN113932296A CN 113932296 A CN113932296 A CN 113932296A CN 202111467628 A CN202111467628 A CN 202111467628A CN 113932296 A CN113932296 A CN 113932296A
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- air door
- control device
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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
- F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
- F24F1/0014—Indoor units, e.g. fan coil units characterised by air outlets having two or more outlet openings
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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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
- F24F13/32—Supports for air-conditioning, air-humidification or ventilation units
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Fluid Mechanics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a novel refrigerating device which is used as an indoor unit of a vertical air conditioner.A shell is vertically and fixedly connected to a corner where two side walls in a room are intersected and is positioned at the middle upper part of the wall; the top end of the shell is provided with an upper air inlet communicated with the air at the upper part of the room, and an upper electric air door is arranged at the upper air inlet; the bottom end of the shell is provided with a lower air inlet communicated with the air at the middle lower part of the room, and the lower air inlet is provided with a lower electric air door; the shell is provided with an electric control device and a temperature sensor connected with the electric control device, and the temperature sensor is embedded on the shell and used for detecting the indoor temperature; the electric control device is matched with a remote controller. The invention also discloses a control method of the refrigerating device. The shell utilizes the dead space at the middle upper part of the indoor wall corner, thereby saving the ground space and improving the utilization rate of the indoor space; the invention can adopt an upper air inlet mode, improves the heat exchange temperature difference under the same evaporator temperature, further improves the heat exchange efficiency of air and the evaporator, and reduces the energy consumption of the air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an indoor unit of a household air conditioner and a control method thereof.
Background
With the continuous improvement of the living standard of people, the air conditioner is becoming one of the necessary household appliances. In the vertical air conditioner in the existing market, an indoor unit of the vertical air conditioner is placed on the indoor ground, is large in size and occupies a large indoor space.
In recent years, the indoor unit of a floor air conditioner has been developed in a multi-functional (e.g., having an anion generator for generating negative air ions, humidification, etc.) direction and an aesthetic direction, but there has been no development in which the indoor usable area can be effectively saved.
The existing indoor unit of the vertical air conditioner adopts a mode of lower air inlet and upper air outlet; the lower part is used for air inlet, and the density of cold air is greater than that of hot air, so that the cold air is below the hot air; the lower air inlet can lead to relatively lower temperature of air entering the indoor unit, and obviously is not beneficial to improving the heat exchange efficiency of the indoor unit.
The hot air on the upper part of the air conditioner is slow in convection and cannot be rapidly cooled; the upper air outlet is highly influenced by air, and the air is easily blown directly to human bodies, thereby bringing adverse effects to human health.
Disclosure of Invention
The invention aims to provide a novel refrigerating device which is high in heat exchange efficiency and can save the indoor effective use area by utilizing the indoor dead space, in particular to an indoor unit of a vertical air conditioner.
In order to achieve the purpose, the novel refrigerating device is used as an indoor unit of a vertical air conditioner and comprises a vertically arranged shell, an evaporator and an inner fan are arranged in the shell, an air outlet is formed in the shell, the evaporator is positioned between the inner fan and the air outlet, the air outlet direction of the inner fan faces the air outlet, and the evaporator is communicated to the outside through a refrigerant pipeline and is connected with an outdoor unit installed outside the room when the novel refrigerating device is used, so that a refrigerating system is formed;
the shell is vertically and fixedly connected to the corner where the two indoor side walls are intersected and is positioned at the middle upper part of the wall;
the top end of the shell is provided with an upper air inlet communicated with the air at the upper part of the room, and an upper electric air door is arranged at the upper air inlet;
the bottom end of the shell is provided with a lower air inlet communicated with the air at the middle lower part of the room, and the lower air inlet is provided with a lower electric air door;
the shell is provided with an electric control device and a temperature sensor connected with the electric control device, and the temperature sensor is embedded on the shell and used for detecting the indoor temperature; the electric control device is matched with a remote controller.
The remote controller is provided with a wind power setting button and controls the inner fan to correspondingly provide 1-6 grades of wind power through the electric control device, wherein the 1 grade of wind power is the minimum, and the 6 grade of wind power is the maximum;
after the refrigeration system is started, a user sets a target value of the indoor temperature through a remote controller, and the target value is called as set temperature TM;
the electronic control device continuously obtains the temperature TS of the indoor air through the temperature sensor, and continuously calculates a difference delta T between the TS and the TM;
when the delta T is larger than or equal to 5 ℃, the electric control device controls the opening degrees of the upper electric air door and the lower electric air door to be 100 percent, and simultaneously, the inner fan is in an opening state;
when the delta T is less than or equal to minus 1 ℃, the electric control device closes the refrigeration system, the inner fan, the upper electric air door and the lower electric air door;
when delta T < 5 ℃ is less than-1 ℃, the electric control device controls the opening degree of the upper electric air door and the opening degree of the lower electric air door according to a wind gear set by the remote controller, and the method specifically comprises the following steps:
when the wind power set by the remote controller is 1 gear, the electric control device controls the lower electric air door to be closed, and simultaneously, the opening degree of the upper electric air door is adjusted to be one third;
when the wind power set by the remote controller is 2 gears, the electric control device controls the lower electric air door to be closed, and simultaneously, the opening degree of the upper electric air door is adjusted to be two thirds;
when the wind power set by the remote controller is 3 grades, the electric control device controls the lower electric air door to be closed, and meanwhile, the opening degree of the upper electric air door is adjusted to be 100 percent;
when the wind power set by the remote controller is 4 gears, the electric control device controls the opening degree of the upper electric air door to be 100 percent, and simultaneously adjusts the opening degree of the lower electric air door to be one third;
when the wind power set by the remote controller is 5 gears, the electric control device controls the opening degree of the upper electric air door to be 100 percent, and simultaneously adjusts the opening degree of the lower electric air door to be two thirds;
when the wind power set by the remote controller is 6 gears, the electric control device controls the opening degree of the upper electric air door to be 100%, and simultaneously adjusts the opening degree of the lower electric air door to be 100%.
The invention has the following advantages:
1. in a living room, a corner where two side walls intersect, especially the middle upper part of the corner, is a dead space which cannot be utilized usually; the shell just utilizes the dead space at the middle upper part of the corner, thereby saving the ground space and improving the utilization rate of the indoor space; for the small house type, the practical value is more obvious, and the market competitiveness of the product is improved.
2. Since the hot air has a lower density than the cold air, the air temperature in the upper portion of the room is higher than that in the lower portion. Because the invention has the upper electric air door positioned at the top of the shell, an upper air inlet mode can be adopted, so that part of air with relatively high indoor temperature enters the shell, the heat exchange temperature difference is further improved at the same evaporator temperature, the heat exchange efficiency of the air and the evaporator is further improved, and the energy consumption of the air conditioner is reduced.
Of course, because the invention also has the lower air inlet, the invention can provide larger air inlet amount by opening the upper air inlet and the lower air inlet simultaneously.
3. By adopting the control method, when the delta T is larger, the upper electric air door and the lower electric air door are opened to the maximum extent, so that the indoor temperature is quickly reduced, and the comfort level of indoor personnel is improved; when the difference between the difference and the difference between the difference and the difference between the difference and the difference between the difference and the difference between the difference and the difference between the difference and the difference between the difference and the difference between the difference and the difference between the difference and the difference between the.
By adopting the control method, when the required air quantity is small (1-3 grades of wind power), the lower electric air door is not opened, and the upper electric air door is opened preferentially and air at the upper part of the room is sucked so as to obtain the largest heat exchange temperature difference, so that the heat exchange efficiency of the evaporator of the indoor unit and the circulating air is improved as much as possible, and the energy consumption of the air conditioner is reduced. Meanwhile, 6 wind speeds are respectively matched with the total opening degrees of 6 upper electric air doors and 6 lower electric air doors, so that the air intake is more matched with the wind power.
In a word, the invention has the advantages of saving indoor space, higher heat exchange efficiency, more energy saving, more matching of the opening degree and the temperature of the electric air door with the set wind power condition and the like.
Drawings
Fig. 1 is a schematic view of the present invention installed at a corner. The direction indicated by the arrow in fig. 1 is the direction of the air flow there.
Detailed Description
As shown in fig. 1, the novel refrigeration device of the present invention is used as an indoor unit of a vertical air conditioner, and comprises a vertically arranged casing 1, an evaporator 2 and an inner fan 3 are arranged in the casing 1, an air outlet 4 is arranged on the casing 1, the evaporator 2 is positioned between the inner fan 3 and the air outlet 4, and the air outlet direction of the inner fan 3 faces the air outlet 4, when in use, the evaporator 2 is led to the outdoor through a refrigerant pipeline and is connected with an outdoor unit installed outdoors, so as to form a refrigeration system; the refrigeration system is conventional in the art and includes a compressor, a condenser, a throttling device (such as a capillary tube) and an evaporator connected in a circulating manner by refrigerant lines, and details thereof are omitted.
The shell 1 is vertically and fixedly connected to a corner 6 where the two indoor side walls 5 are intersected and is positioned at the middle upper part of the wall;
an upper air inlet 7 communicated with the air at the upper part of the room is arranged at the top end of the shell 1, and an upper electric air door 8 is arranged at the upper air inlet 7;
the bottom end of the shell 1 is provided with a lower air inlet 9 communicated with the air at the middle lower part of the room, and a lower electric air door 10 is arranged at the lower air inlet 9;
the shell 1 is provided with an electric control device 11 and a temperature sensor 12 connected with the electric control device 11 through a circuit, and the temperature sensor 12 is embedded on the shell 1 and used for detecting indoor air temperature; the electric control device 11 is provided with a remote controller. The remote controller for air conditioner is a conventional one, not shown.
The invention has the following advantages:
1. in the living room, the corner 6 where the two side walls 5 intersect, especially the middle upper part of the corner 6, is a dead space which can not be utilized usually; in the invention, the shell 1 just utilizes the dead space at the middle upper part of the corner 6, thereby saving the ground space and improving the utilization rate of the indoor space; for the small house type, the practical value is more obvious, and the market competitiveness of the product is improved.
2. Since the hot air has a lower density than the cold air, the air temperature in the upper portion of the room is higher than that in the lower portion. Because the air conditioner is provided with the upper electric air door 8 positioned at the top of the shell 1, an upper air inlet mode can be adopted, so that part of air with relatively high indoor temperature enters the shell 1, the heat exchange temperature difference is improved at the same temperature of the evaporator 2, the heat exchange efficiency of the air and the evaporator 2 is improved, and the energy consumption of the air conditioner is reduced.
Of course, since the present invention also has the lower air inlet 9, the present invention can provide a larger air inlet amount by opening the upper air inlet 7 and the lower air inlet 9 at the same time.
The invention also provides a control method of the novel refrigerating device, the remote controller is provided with a wind power setting button and controls the inner fan 3 to correspondingly provide 1-6 grades of wind power through the electric control device 11 (namely the inner fan 3 can provide 1 grade, 2 grade, 3 grade, 4 grade, 5 grade and 6 grade of wind power under the control of the electric control device 11), the 1 grade of wind power is minimum, and the 6 grade of wind power is maximum;
after the refrigeration system is started, a user sets a target value of the indoor temperature through a remote controller, and the target value is called as set temperature TM;
the electronic control device 11 continuously obtains the temperature TS of the indoor air through the temperature sensor 12, and continuously calculates a difference Δ T between the TS and the TM as TS-TM;
when the Δ T is greater than or equal to 5 ℃, the electronic control device 11 controls the opening degrees of the upper electronic air door 8 and the lower electronic air door 10 to be 100%, and simultaneously, the inner fan 3 is in an opening state;
when delta T is less than or equal to minus 1 ℃, the electric control device 11 closes the refrigeration system (compressor), the inner fan 3, the upper electric air door 8 and the lower electric air door 10;
when the temperature is less than minus 1 ℃ and less than delta T and less than 5 ℃, the electric control device 11 controls the opening degree of the upper electric air door 8 and the opening degree of the lower electric air door 10 according to the wind gear set by the remote controller, and the method specifically comprises the following steps:
when the wind power set by the remote controller is 1 gear, the electric control device 11 controls the lower electric air door 10 to be closed, and simultaneously adjusts the opening degree of the upper electric air door 8 to be one third;
when the wind power set by the remote controller is 2 gears, the electric control device 11 controls the lower electric air door 10 to be closed, and simultaneously, the opening degree of the upper electric air door 8 is adjusted to be two thirds;
when the wind power set by the remote controller is 3 grades, the electric control device 11 controls the lower electric air door 10 to be closed, and simultaneously adjusts the opening degree of the upper electric air door 8 to be 100 percent (namely, full opening);
when the wind power set by the remote controller is 4 gears, the electric control device 11 controls the opening degree of the upper electric air door 8 to be 100%, and simultaneously adjusts the opening degree of the lower electric air door 10 to be one third;
when the wind power set by the remote controller is 5 gears, the electric control device 11 controls the opening degree of the upper electric air door 8 to be 100%, and simultaneously adjusts the opening degree of the lower electric air door 10 to be two thirds;
when the wind power set by the remote controller is 6 gears, the electric control device 11 controls the opening degree of the upper electric air door 8 to be 100%, and simultaneously adjusts the opening degree of the lower electric air door 10 to be 100%.
By adopting the control method, when the delta T is larger, the upper electric air door 8 and the lower electric air door 10 are opened to the greatest extent, so that the indoor temperature is rapidly reduced, and the comfort level of indoor personnel is improved; when the difference between the difference and the difference between the difference and the difference between the difference and the difference between the difference and the difference between the difference and the difference between the difference and the difference between the difference and the difference between the difference and the difference between the difference and the difference between the.
By adopting the control method of the invention, when the required air quantity is smaller, the lower electric air door 10 is not opened, the upper electric air door 8 is opened preferentially and the air at the upper part of the room is sucked, so that the heat exchange temperature difference as large as possible is obtained, the heat exchange efficiency of the evaporator 2 of the indoor unit and the circulating air is improved as much as possible, and the energy consumption of the air conditioner is reduced. Meanwhile, 6 wind gears can be matched with the total opening degrees of 6 upper electric air doors 8 and lower electric air doors 10, so that the air intake is more matched with the wind power.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (2)
1. A novel refrigerating device is used as an indoor unit of a vertical air conditioner and comprises a vertically arranged shell, an evaporator and an inner fan are arranged in the shell, an air outlet is formed in the shell, the evaporator is positioned between the inner fan and the air outlet, the air outlet direction of the inner fan faces the air outlet, and the evaporator is led to the outdoor through a refrigerant pipeline and is connected with an outdoor unit installed outdoors to form a refrigerating system when in use;
the method is characterized in that:
the shell is vertically and fixedly connected to the corner where the two indoor side walls are intersected and is positioned at the middle upper part of the wall;
the top end of the shell is provided with an upper air inlet communicated with the air at the upper part of the room, and an upper electric air door is arranged at the upper air inlet;
the bottom end of the shell is provided with a lower air inlet communicated with the air at the middle lower part of the room, and the lower air inlet is provided with a lower electric air door;
the shell is provided with an electric control device and a temperature sensor connected with the electric control device, and the temperature sensor is embedded on the shell and used for detecting the indoor temperature; the electric control device is matched with a remote controller.
2. A method of controlling a novel refrigeration unit as set forth in claim 1, wherein:
the remote controller is provided with a wind power setting button and controls the inner fan to correspondingly provide 1-6 grades of wind power through the electric control device, wherein the 1 grade of wind power is the minimum, and the 6 grade of wind power is the maximum;
after the refrigeration system is started, a user sets a target value of the indoor temperature through a remote controller, and the target value is called as set temperature TM;
the electronic control device continuously obtains the temperature TS of the indoor air through the temperature sensor, and continuously calculates a difference delta T between the TS and the TM;
when the delta T is larger than or equal to 5 ℃, the electric control device controls the opening degrees of the upper electric air door and the lower electric air door to be 100 percent, and simultaneously, the inner fan is in an opening state;
when the delta T is less than or equal to minus 1 ℃, the electric control device closes the refrigeration system, the inner fan, the upper electric air door and the lower electric air door;
when delta T < 5 ℃ is less than-1 ℃, the electric control device controls the opening degree of the upper electric air door and the opening degree of the lower electric air door according to a wind gear set by the remote controller, and the method specifically comprises the following steps:
when the wind power set by the remote controller is 1 gear, the electric control device controls the lower electric air door to be closed, and simultaneously, the opening degree of the upper electric air door is adjusted to be one third;
when the wind power set by the remote controller is 2 gears, the electric control device controls the lower electric air door to be closed, and simultaneously, the opening degree of the upper electric air door is adjusted to be two thirds;
when the wind power set by the remote controller is 3 grades, the electric control device controls the lower electric air door to be closed, and meanwhile, the opening degree of the upper electric air door is adjusted to be 100 percent;
when the wind power set by the remote controller is 4 gears, the electric control device controls the opening degree of the upper electric air door to be 100 percent, and simultaneously adjusts the opening degree of the lower electric air door to be one third;
when the wind power set by the remote controller is 5 gears, the electric control device controls the opening degree of the upper electric air door to be 100 percent, and simultaneously adjusts the opening degree of the lower electric air door to be two thirds;
when the wind power set by the remote controller is 6 gears, the electric control device controls the opening degree of the upper electric air door to be 100%, and simultaneously adjusts the opening degree of the lower electric air door to be 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111467628.9A CN113932296B (en) | 2021-12-03 | 2021-12-03 | Novel refrigerating device and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111467628.9A CN113932296B (en) | 2021-12-03 | 2021-12-03 | Novel refrigerating device and control method |
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| Publication Number | Publication Date |
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| CN113932296A true CN113932296A (en) | 2022-01-14 |
| CN113932296B CN113932296B (en) | 2023-05-12 |
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| CN202111467628.9A Active CN113932296B (en) | 2021-12-03 | 2021-12-03 | Novel refrigerating device and control method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1279902A2 (en) * | 2001-07-25 | 2003-01-29 | Lg Electronics Inc. | Apparatus and method for controlling operation of air conditioner |
| CN102168880A (en) * | 2011-03-18 | 2011-08-31 | 上海科泰运输制冷设备有限公司 | Fresh air volume control device of rail transit air conditioning unit |
| CN106016666A (en) * | 2016-06-27 | 2016-10-12 | 珠海格力电器股份有限公司 | Air conditioner and air inlet protection system thereof |
| CN106152424A (en) * | 2016-08-31 | 2016-11-23 | 青岛海尔空调器有限总公司 | A kind of air volume controlled apparatus control method in air-conditioning |
| CN208238003U (en) * | 2018-04-02 | 2018-12-14 | 珠海格力电器股份有限公司 | air conditioner |
| CN109442574A (en) * | 2018-10-30 | 2019-03-08 | 海信（山东）空调有限公司 | A kind of air conditioner indoor unit |
| CN112682854A (en) * | 2020-12-01 | 2021-04-20 | 珠海格力电器股份有限公司 | Suspension angle type air conditioner |
-
2021
- 2021-12-03 CN CN202111467628.9A patent/CN113932296B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1279902A2 (en) * | 2001-07-25 | 2003-01-29 | Lg Electronics Inc. | Apparatus and method for controlling operation of air conditioner |
| CN102168880A (en) * | 2011-03-18 | 2011-08-31 | 上海科泰运输制冷设备有限公司 | Fresh air volume control device of rail transit air conditioning unit |
| CN106016666A (en) * | 2016-06-27 | 2016-10-12 | 珠海格力电器股份有限公司 | Air conditioner and air inlet protection system thereof |
| CN106152424A (en) * | 2016-08-31 | 2016-11-23 | 青岛海尔空调器有限总公司 | A kind of air volume controlled apparatus control method in air-conditioning |
| CN208238003U (en) * | 2018-04-02 | 2018-12-14 | 珠海格力电器股份有限公司 | air conditioner |
| CN109442574A (en) * | 2018-10-30 | 2019-03-08 | 海信（山东）空调有限公司 | A kind of air conditioner indoor unit |
| CN112682854A (en) * | 2020-12-01 | 2021-04-20 | 珠海格力电器股份有限公司 | Suspension angle type air conditioner |
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|---|---|
| CN113932296B (en) | 2023-05-12 |
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