CN107091498B - Air conditioner control system and multi-tube set air conditioner - Google Patents
Air conditioner control system and multi-tube set air conditioner Download PDFInfo
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- CN107091498B CN107091498B CN201710329837.4A CN201710329837A CN107091498B CN 107091498 B CN107091498 B CN 107091498B CN 201710329837 A CN201710329837 A CN 201710329837A CN 107091498 B CN107091498 B CN 107091498B
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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
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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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
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/26—Refrigerant piping
- F24F1/32—Refrigerant piping for connecting the separate outdoor units to indoor units
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to 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
- F24F11/89—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
- F24F2110/00—Control inputs relating to air properties
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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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner control system and a multi-tube set air conditioner, wherein the air conditioner control system comprises an outer machine assembly and two or more sets of inner machines, each set of inner machines is communicated with the outer machine assembly through a refrigerant pipeline, a parallel throttle valve is arranged at a pipeline section where the refrigerant pipelines of the inner machines converge, and a stop valve is arranged between the refrigerant pipeline of each inner machine and the adjacent throttle valve pipeline and used for controlling whether the corresponding inner machine is connected into the system to work or not. The throttle valves connected in parallel are connected at the refrigerant pipeline intersection section of the inner machine, and because a plurality of throttle valves are connected in parallel on the pipeline, the controllable adjusting range of the flow control is equivalent to the summation of the control intervals of the throttle valves connected in parallel, the throttle valves can fully adapt to the working requirement of the parallel connection of a plurality of inner machines, when the number of the connected working inner machines is less, a part of the throttle valves connected in parallel can be directly closed, and the control is accessed only through one independent throttle valve, so that the breadth and the control accuracy of the control interval of the refrigerant flow control of the throttle valves are ensured.
Description
Technical Field
The invention relates to the technical field of air conditioning equipment, in particular to an air conditioning control system and a multi-tube-set air conditioner.
Background
With the increase of market share of the existing household air conditioners, the design concept of the household air conditioners is more emphasized on convenience, so that a multi-group pipe air conditioning system becomes a preferred choice of household clothes. However, the multi-group air conditioning system hardly takes into account the flow control and the system throttling effect of the multi-group indoor unit pipelines, and specifically: because the outdoor unit shares one system, the problem of serious bias current is easy to occur when a plurality of indoor units are operated simultaneously.
Furthermore, the common multi-tube air conditioning systems in the market at present generally adopt a control scheme of capillary tube throttling and expansion valve flow equalizing, the throttling devices mainly playing a throttling role are capillary tubes, the throttling effect of the capillary tubes is known to be fixed and unchangeable, the air conditioner cannot adapt to the operation of different temperature fields, and the problems of insufficient indoor machine flow, excessive low-temperature refrigerant circulation, unobvious inner side capacity effect and the like are easily caused.
Therefore, the problem of bias flow of the air conditioning equipment is solved, the throttling effect is ensured, the capacity of an internal machine is increased, and the problem that a plurality of pipes are important is solved.
In summary, how to effectively solve the problems that the flow control of each internal machine is difficult to achieve by the existing multi-tube-set air conditioner and the throttling adjustment of the whole system is difficult to be considered, so that equipment is easy to deviate or a single internal machine is unsmooth in work and the like is a problem which needs to be solved by the technicians in the field at present.
Disclosure of Invention
In view of the above, a first object of the present invention is to provide an air conditioning control system, which has a structural design that can effectively solve the problems that the conventional multi-unit air conditioner is difficult to control the flow of each indoor unit and the throttle of the whole system is difficult to be adjusted, so that the equipment is prone to drift or a single indoor unit is not smooth to work, and the like.
In order to achieve the first object, the invention provides the following technical scheme:
the utility model provides an air conditioner control system for multitube group air conditioner, includes outer machine subassembly and interior machine subassembly, interior machine subassembly includes two sets of or more than two sets of interior machines, and every group interior machine all through the refrigerant pipeline with outer machine subassembly intercommunication, the pipeline section that the refrigerant pipeline that interior machine was located converges is provided with parallelly connected choke valve, all is provided with the stop valve between every interior machine place refrigerant pipeline and the adjacent choke valve pipeline position for whether the control corresponds the interior machine and inserts system work.
Preferably, in the air conditioner control system, the pipeline section where the refrigerant pipelines converge is provided with two throttle valves connected in parallel, and the positions where each throttle valve is communicated with the refrigerant pipeline of the internal unit are separated from each other to control the internal unit in different pipeline areas to work.
Preferably, in the air conditioning control system, each group of the indoor units is provided with an indoor unit control valve for controlling the throughput of the refrigerant on a branch of the refrigerant pipeline where the indoor unit is located.
Preferably, in the air conditioning control system, a branch of the refrigerant pipeline where each group of the indoor units are located is provided with a temperature sensing controller for monitoring the superheat degree of the pipe temperature of each group of the indoor units, so as to control the opening degree of the control valve corresponding to the indoor unit, and adjust the refrigerant flow of the corresponding indoor unit.
Preferably, in the air conditioning control system, the throttle valves are all electronic expansion valves.
Preferably, the air conditioning control system further comprises an external temperature sensing controller, wherein the external temperature sensing controller is used for monitoring the outdoor environment temperature and controlling the opening of the throttle valve in combination with a set working mode.
The invention provides an air conditioner control system for a multi-tube set air conditioner, which comprises an outer machine assembly and inner machine assemblies, wherein each inner machine assembly comprises two or more groups of inner machines, each group of inner machines is communicated with the outer machine assembly through a refrigerant pipeline, a pipeline section where the refrigerant pipelines of the inner machines converge is provided with a throttle valve connected in parallel, and a stop valve is arranged between the refrigerant pipeline of each inner machine and the adjacent throttle valve pipeline and used for controlling whether the corresponding inner machine is connected into the system to work or not. The air conditioner control system provided by the invention is adopted to control the air conditioning equipment of a plurality of groups of internal machines, the cross section of the refrigerant pipeline of the internal machines is connected with the throttle valves which are connected in parallel, the refrigerant flow passing through each working internal machine is controlled by the throttle valves, and the pipelines are connected with a plurality of throttle valves in parallel, so the controllable adjusting range of the flow control is equivalent to the summation of the control sections of the throttle valves which are connected in parallel, the parallel working requirements of the internal machines can be fully adapted, when the number of the connected working internal machines is less, a part of the throttle valves which are connected in parallel can be directly closed, and the refrigerant pipeline is connected to be controlled only by a few or one single throttle valve, thereby the breadth of the refrigerant flow adjusting section controlled by the throttle; furthermore, the stop valves are arranged between the refrigerant pipeline of each internal machine and the adjacent throttle valve, so that the number and the positions of the internal machines connected into the system to work can be effectively controlled, and the independent control of each single internal machine is realized. In conclusion, the air conditioner control system provided by the invention effectively solves the problems that the flow control of each internal machine is difficult to achieve by the conventional multi-tube-set air conditioner, the throttling regulation of the whole system is difficult to be considered, the equipment is easy to deviate, the single internal machine is unsmooth to work and the like.
In order to achieve the second object, the present invention also provides a multi-bank air conditioner including any one of the air conditioner control systems described above. Since the air conditioning control system has the technical effects, the multi-tube group air conditioner with the air conditioning control system also has the corresponding technical effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a pipeline structure of an air conditioning control system according to an embodiment of the present invention.
The drawings are numbered as follows:
the device comprises an inner machine 1, a throttle valve 2, a stop valve 3 and an inner machine control valve 4.
Detailed Description
The embodiment of the invention discloses an air conditioner control system, which aims to solve the problems that the flow control of each internal machine is difficult to realize in the conventional multi-tube-set air conditioner, the throttling regulation of the whole system is difficult to take into account, equipment is easy to deviate, a single internal machine is unsmooth to work and the like.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic diagram of a pipeline structure of an air conditioning control system according to an embodiment of the present invention.
The air conditioner control system provided by the embodiment of the invention is used for a multi-tube set air conditioner and comprises an outer machine assembly and inner machine assemblies, wherein each inner machine assembly comprises two or more groups of inner machines 1, each group of inner machines 1 is communicated with the outer machine assembly through a refrigerant pipeline, a pipeline section where the refrigerant pipelines of the inner machines 1 converge is provided with a throttle valve 2 connected in parallel, and a stop valve 3 is arranged between the refrigerant pipeline of each inner machine 1 and the pipeline position of the adjacent throttle valve 2 and used for controlling whether the corresponding inner machine 1 is connected into the system to work.
It should be noted that the number of the throttle valves connected in parallel here can be determined according to the number of the internal machines in the multi-unit air conditioner, and when the number of the internal machines is large, the number of the throttle valves connected in parallel can be correspondingly increased so as to correspond to the working capacity of the internal machines and enhance the size of the valve control section.
The specific control scheme is roughly as follows: under the conditions of low-temperature refrigeration and high-temperature heating, one throttle valve is in a closed state, the demand capacity of an internal machine is small, the circulation quantity of a refrigerant is small, and one valve is controlled to be more beneficial to system operation; under the conditions of high-temperature state refrigeration and low-temperature state heating, the two throttle valves and the throttle valve are simultaneously opened, and the circulation flow of the internal machine and the external machine is increased. Under the condition of singly opening one internal machine, only one throttle valve is independently opened, and a stop valve corresponding to the internal machine is opened, so that one throttle valve of the system controls one internal machine; when the two internal machines are singly opened, the two throttle valves are controlled by a stop valve to respectively control the flow rates of the two internal machines, and the two throttle valves are correspondingly controlled one by one; if three or four throttle valves are opened at the same time, the two throttle valves control a plurality of flows at the same time.
The air conditioner control system provided by the embodiment is adopted to control the air conditioning equipment of a plurality of groups of internal machines, the throttle valves connected in parallel are connected at the refrigerant pipeline intersection sections of the internal machines, the refrigerant flow passing through each working internal machine is controlled by the throttle valves, and the pipelines are connected in parallel with a plurality of throttle valves, so that the controllable adjusting range of flow control is equivalent to the summation of the control sections of the throttle valves connected in parallel, the parallel working requirements of the internal machines can be fully met, when the number of the connected working internal machines is small, a part of the throttle valves connected in parallel can be directly closed, and the refrigerant pipelines are connected in for control only through a few or one single throttle valve, thereby ensuring the breadth of the refrigerant flow adjusting section controlled by the throttle valves; furthermore, the stop valves are arranged between the refrigerant pipeline of each internal machine and the adjacent throttle valve, so that the number and the positions of the internal machines connected into the system to work can be effectively controlled, and the independent control of each single internal machine is realized. In conclusion, the air conditioner control system provided by the invention effectively solves the problems that the flow control of each internal machine is difficult to achieve by the conventional multi-tube-set air conditioner, the throttling regulation of the whole system is difficult to be considered, the equipment is easy to deviate, the single internal machine is unsmooth to work and the like.
In order to further optimize the technical solution, it is preferable on the basis of the above embodiment that in the air-conditioning control system, a pipeline section where refrigerant pipelines converge is provided with two throttle valves 2 connected in parallel, and a position where each throttle valve 2 is communicated with a refrigerant pipeline of the internal unit 1 is separated from another position to control the internal unit 1 in different pipeline areas to work.
In the technical scheme that this embodiment provided, further limited the quantity of the parallelly connected choke valve to the mutual structure of separating in the position that the refrigerant pipeline that the choke valve that will connect in parallel each other and interior machine communicates has been proposed here, and it is the position that only one end of choke valve exists the backward flow and the way, and the other end disperses, and this kind of design can make the interior machine connection in choke valve and the pipeline tighter, has reduced the total control length of refrigerant pipeline, has optimized the normal operating of system.
In order to further optimize the technical solution, it is preferable on the basis of the above embodiment that, in the air-conditioning control system, each group of the indoor units 1 is provided with an indoor unit control valve 4 for controlling the throughput of the refrigerant in a branch of the refrigerant pipeline.
The technical scheme that this embodiment provided, on the basis of providing the stop valve that controls every interior machine refrigerant flow respectively in the aforesaid embodiment, further all be provided with the interior machine control valve of control refrigerant throughput on the branch road of the refrigerant pipeline that every group interior machine is located, interior machine control valve is on the basis that on-off control can be realized to the stop valve, further provided the function of the refrigerant flow of accurate control through every branch road interior machine, can be in the accurate control every interior machine's of work refrigerant circulation volume through interior machine control valve, especially when many interior machines are worked simultaneously, the refrigerant volume distribution between the balanced different interior machines, further prevent the condition that the interior machine deflected, make every interior machine all can work under the refrigerant supply volume with the most suitable demand.
In order to further optimize the technical scheme, it is preferable on the basis of the above embodiment that in the air-conditioning control system, a branch of the refrigerant pipeline where each group of the indoor units 1 are located is provided with a temperature sensing controller for monitoring the superheat degree of the pipe temperature of each group of the indoor units 1, so as to control the opening degree of the corresponding indoor unit control valve 4, and to adjust the refrigerant flow rate of the corresponding indoor unit 1.
In the technical scheme provided by the implementation, the branch at each internal machine is provided with temperature sensing control for monitoring the temperature of the internal machine pipe on each branch, and whether the refrigerant circulation of the branch is excessive is judged by the temperature of the internal machine pipe, so that the control valve of the internal machine is controlled, and the adjustment of the refrigerant circulation amount is realized.
In order to further optimize the above technical solution, it is preferable that, in the air conditioning control system according to the above embodiment, the throttle valves 2 are all electronic expansion valves.
In the technical scheme that this embodiment provided, adopt electronic expansion valve as the choke valve, this scheme control is realized easily, the automated control of the system of being convenient for to it is accurate to adjust the pipeline aperture effect, can promote the accuracy of refrigerant control.
In order to further optimize the technical solution, on the basis of the above embodiment, it is preferable that the air conditioning control system further includes an external temperature sensing controller, and the external temperature sensing controller is configured to monitor an outdoor ambient temperature and control the opening of the throttle valve 2 in combination with a set operation mode.
In the technical solution provided in this embodiment, an external temperature sensing controller is further provided to sense the temperature of the outdoor environment, and preferably, by providing a main controller, the obtained outdoor environment temperature and the set working mode, including the cooling or heating condition and the set temperature, are combined, and the number of the internal machines is also included, so that the opening of the throttle valve is more accurately controlled, and the control precision is realized.
Based on the air conditioner control system provided in the above embodiment, the present invention also provides a multi-pack air conditioner including any one of the air conditioner control systems in the above embodiments. Since the multi-tube group air conditioner adopts the air conditioner control system in the above embodiment, please refer to the above embodiment for the beneficial effects of the multi-tube group air conditioner.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. An air conditioner control system is used for a multi-tube set air conditioner and comprises an outer machine assembly and inner machine assemblies, wherein each inner machine assembly comprises more than two groups of inner machines and is characterized in that each group of inner machines is communicated with the outer machine assembly through a refrigerant pipeline, a pipeline section where the refrigerant pipelines of the inner machines converge is provided with a throttle valve connected in parallel, and a stop valve is arranged between the refrigerant pipeline of each inner machine and the adjacent throttle valve pipeline and used for controlling whether the corresponding inner machine is connected into the system to work;
the pipeline section of the refrigerant pipeline confluence is provided with two throttle valves which are connected in parallel, and the positions of the throttle valves communicated with the refrigerant pipelines of the inner machine are mutually separated so as to control the inner machine in different pipeline areas to work;
the branch of the refrigerant pipeline where each group of the inner machines are arranged is provided with an inner machine control valve for controlling the throughput of the refrigerant;
and the branch of the refrigerant pipeline where each group of the inner machines are arranged is provided with a temperature sensing controller for monitoring the superheat degree of the pipe temperature of each group of the inner machines so as to control the opening degree of the control valve corresponding to the inner machine and adjust the refrigerant flow of the corresponding inner machine.
2. The air conditioning control system of claim 1, wherein the throttle valves are all electronic expansion valves.
3. The air conditioning control system according to claim 2, further comprising an external temperature sensing controller for monitoring an outdoor ambient temperature and controlling the opening degree of the throttle valve in conjunction with setting an operation mode.
4. A multi-bank air conditioner characterized by comprising the air conditioning control system according to any one of claims 1 to 3.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710329837.4A CN107091498B (en) | 2017-05-11 | 2017-05-11 | Air conditioner control system and multi-tube set air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710329837.4A CN107091498B (en) | 2017-05-11 | 2017-05-11 | Air conditioner control system and multi-tube set air conditioner |
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| CN107091498A CN107091498A (en) | 2017-08-25 |
| CN107091498B true CN107091498B (en) | 2020-03-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111795481B (en) * | 2019-04-08 | 2023-05-23 | 开利公司 | Air conditioning system and control method therefor |
| CN110260416B (en) * | 2019-05-28 | 2021-04-16 | 青岛海信日立空调系统有限公司 | Partitioned heat exchanger assembly, air conditioner and control method of partitioned heat exchanger assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4876859A (en) * | 1987-09-10 | 1989-10-31 | Kabushiki Kaisha Toshiba | Multi-type air conditioner system with starting control for parallel operated compressors therein |
| CN101788172A (en) * | 2009-01-22 | 2010-07-28 | 珠海格力电器股份有限公司 | Energy storage air conditioning unit and working method thereof |
| CN102165272A (en) * | 2009-03-30 | 2011-08-24 | 三菱重工业株式会社 | Multiple air conditioner |
| CN102767923A (en) * | 2012-06-26 | 2012-11-07 | 广东美的暖通设备有限公司 | Throttling device and air conditioner adopting same |
| CN204115162U (en) * | 2014-09-30 | 2015-01-21 | 广东志高暖通设备股份有限公司 | A kind of interior machine controller of multiple on-line system |
-
2017
- 2017-05-11 CN CN201710329837.4A patent/CN107091498B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4876859A (en) * | 1987-09-10 | 1989-10-31 | Kabushiki Kaisha Toshiba | Multi-type air conditioner system with starting control for parallel operated compressors therein |
| CN101788172A (en) * | 2009-01-22 | 2010-07-28 | 珠海格力电器股份有限公司 | Energy storage air conditioning unit and working method thereof |
| CN102165272A (en) * | 2009-03-30 | 2011-08-24 | 三菱重工业株式会社 | Multiple air conditioner |
| CN102767923A (en) * | 2012-06-26 | 2012-11-07 | 广东美的暖通设备有限公司 | Throttling device and air conditioner adopting same |
| CN204115162U (en) * | 2014-09-30 | 2015-01-21 | 广东志高暖通设备股份有限公司 | A kind of interior machine controller of multiple on-line system |
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| CN107091498A (en) | 2017-08-25 |
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Address after: 510000 No.1 by helongsha villager group, Shengli village, Lishui Town, Nanhai District, Foshan City, Guangdong Province Patentee after: Guangdong Kaili HVAC Co.,Ltd. Address before: 510000 No.1 by helongsha villager group, Shengli village, Lishui Town, Nanhai District, Foshan City, Guangdong Province Patentee before: GUANGDONG CHIGO HEATING AND VENTILATION EQUIPMENT Co.,Ltd. |
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