CN110285565A - Noise reduction equipment, air conditioning unit and control method of air conditioning unit - Google Patents
Noise reduction equipment, air conditioning unit and control method of air conditioning unit Download PDFInfo
- Publication number
- CN110285565A CN110285565A CN201910562760.4A CN201910562760A CN110285565A CN 110285565 A CN110285565 A CN 110285565A CN 201910562760 A CN201910562760 A CN 201910562760A CN 110285565 A CN110285565 A CN 110285565A
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- Prior art keywords
- liquid pipe
- indoor unit
- reducing apparatus
- module
- noise reducing
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- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004378 air conditioning Methods 0.000 title abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 81
- 238000005057 refrigeration Methods 0.000 claims abstract description 40
- 239000003507 refrigerant Substances 0.000 claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims description 44
- 238000004781 supercooling Methods 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
- F24F13/24—Means for preventing or suppressing noise
-
- 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
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/242—Sound-absorbing material
Landscapes
- 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)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application provides a noise reduction device, an air conditioning unit and a control method of the air conditioning unit. The device of making an uproar falls in this equipment of making an uproar includes that the liquid pipe falls the device of making an uproar, and the liquid pipe falls the device and includes electromagnetism refrigeration module and the liquid pipe of setting on electromagnetism refrigeration module, and the both ends of liquid pipe form liquid pipe entry and liquid pipe export respectively. By applying the technical scheme of the invention, the liquid pipe inlet and the liquid pipe outlet are respectively connected with the liquid pipe leading to the indoor unit, and the refrigerant in the liquid pipe leading to the indoor unit can pass through the liquid pipe. At the moment, the electromagnetic refrigeration module can cool the liquid pipe, the state of the low-pressure low-temperature liquid refrigerant is kept or the refrigerant in the liquid pipe is condensed into liquid for the second time, and therefore obvious airflow sound is avoided due to the fact that the refrigerant cannot be completely evaporated and absorb heat in the indoor unit.
Description
Technical field
The present invention relates to technical field of refrigeration equipment, in particular to a kind of noise reducing apparatus and air-conditioner set and air-conditioning
The control method of unit.
Background technique
The project installation of existing multi-connected machine is mostly type selecting with Super long tube, more number of units, big drop, super proportion, Low perfusion amount
Or installation trend.But some multi-connected machines cause the project installation of many violations to occur due to excessively pursuing above-mentioned effect.
The main problem that the project installation of some violations occurs is that noise is big, reduces the usage experience of client.But because
After project installation, often mating finishing also will be installed and finish, be difficult it is on sale after carry out maintenance trimming.
Summary of the invention
The embodiment of the invention provides the control methods of a kind of noise reducing apparatus and air-conditioner set and air-conditioner set, existing to solve
There is the existing technical problem excessive using noise of air-conditioner set in technology.
The application embodiment provides a kind of noise reducing apparatus, comprising: liquid pipe denoising device, liquid pipe denoising device include electromagnetism
Refrigeration module and the liquid pipe being arranged in electromagnetic refrigeration module, the both ends of liquid pipe are respectively formed liquid pipe entrance and liquid pipe outlet, liquid
Tube inlet and liquid pipe outlet with the liquid pipe for leading to indoor unit for being connected respectively.
In one embodiment, liquid pipe is in bending coiled shape.
In one embodiment, liquid pipe denoising device further includes heating module, and heating module is abutted against with liquid pipe.
In one embodiment, heating module is disposed adjacent with electromagnetic refrigeration module, liquid pipe be set to heating module with
Between electromagnetic refrigeration module.
In one embodiment, heating module is electromagnetism heating module.
In one embodiment, noise reducing apparatus further includes tracheae denoising device, and tracheae denoising device includes sound-absorbing sound insulation
Module and the tracheae being arranged in sound-absorbing sound insulation module, the both ends of tracheae are respectively formed air pipe inlet and tracheae outlet, and tracheae enters
Mouth and tracheae outlet with the tracheae for leading to indoor unit for being connected respectively.
In one embodiment, denoiser is connected on tracheae, endotracheal refrigerant, which flows through denoiser, reduces noise.
In one embodiment, noise reducing apparatus further includes controller, controller and electromagnetic refrigeration module and heating module
Electrical connection, controller are used to control the operation of electromagnetic refrigeration module and heating module.
Present invention also provides a kind of air-conditioner sets, including indoor unit and outdoor unit, pass through between indoor unit and outdoor unit
Refrigerant pipeline is connected, and air-conditioner set further includes above-mentioned noise reducing apparatus, and noise reducing apparatus is mounted on refrigerant pipeline.
Present invention also provides a kind of control method of air-conditioner set, control method is used for above-mentioned air-conditioner set, control
Method includes: refrigeration noise reduction mode, when what the degree of supercooling of outdoor unit was greater than or equal to first predetermined value or indoor unit enters tube temperature
Degree is less than second predetermined value, then opens electromagnetic refrigeration module；When the degree of supercooling of outdoor unit is less than third predetermined value and indoor unit
Enter tube temperature degree more than or equal to the 4th predetermined value, then closes electromagnetic refrigeration module.
In one embodiment, liquid pipe denoising device further includes heating module, and heating module is abutted against with liquid pipe, control
Method includes: heating auxiliary mode, enters tube temperature degree lower than the 5th predetermined value when indoor unit, and the degree of supercooling of indoor unit is greater than the
When six predetermined values, heating module is opened；Otherwise, heating module is closed.
In the above-described embodiments, liquid pipe entrance and liquid pipe outlet are connected with the liquid pipe for leading to indoor unit respectively, lead to room
Refrigerant in the liquid pipe of interior machine runs past liquid pipe.At this point, electromagnetic refrigeration module can cool down to liquid pipe, low pressure is kept
The state of low temperature liquid refrigerant or by the time condensation of the refrigerant in liquid pipe at liquid, avoid because refrigerant indoors
In machine because can not evaporating completely heat absorption, and generate apparent airflow noise.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the schematic perspective view of the embodiment of noise reducing apparatus according to the present invention；
Fig. 2 is the structural schematic diagram of the embodiment of air-conditioner set according to the present invention；
Fig. 3 is the control flow schematic diagram of the control method of air-conditioner set according to the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, right below with reference to embodiment and attached drawing
The present invention is described in further details.Here, exemplary embodiment and its explanation of the invention is used to explain the present invention, but simultaneously
It is not as a limitation of the invention.
According to the investigation for generating noise because of project installation to multi-connected machine, the main reason is that because in cooling mode,
Due to Super long tube and groundwater increment is few and indoor unit number of units more than and refrigerant pipeline heat preservation it is poor, cause because of outdoor unit outflow liquid refrigeration
Agent flows in 40 Shi Chang connecting leg of indoor unit constantly evaporation and becomes gaseous refrigerant, when arriving indoor unit can not evaporator heat absorption, and
Generate apparent airflow noise.
Based on the above issues, in the inventive solutions, it shall be guaranteed that effectively refrigeration allows liquid towards indoor unit 40
There are enough degree of supercoolings for pipe, that is, when flowing to indoor unit 40, still keep low-pressure low-temperature liquid refrigerant, then from indoor heat absorption to
Up to the purpose for reducing room temperature.As shown in Figure 1, the noise reducing apparatus includes liquid pipe denoising device 10, liquid pipe denoising device 10 is wrapped
The liquid pipe 12 for including electromagnetic refrigeration module 11 and being arranged in electromagnetic refrigeration module 11, the both ends of liquid pipe 12 are respectively formed liquid pipe entrance
121 and liquid pipe outlet 122.
Apply the technical scheme of the present invention, by liquid pipe entrance 121 and liquid pipe outlet 122 respectively with lead to indoor unit 40 liquid
Pipe is connected, and runs past liquid pipe 12 towards the refrigerant in the liquid pipe of indoor unit 40.At this point, electromagnetic refrigeration module 11 can be to liquid
Pipe 12 cools down, and keeps the state of low-pressure low-temperature liquid refrigerant or by the time condensation of the refrigerant in liquid pipe at liquid
State, avoid because refrigerant indoors in machine 40 because can not evaporating completely heat absorption, and generate apparent airflow noise.
It should be noted that the working principle of electromagnetic refrigeration module 11 is using magnetic substance (such as gallium rolls stone substance) in magnetic
Adiabatic magnetization in, absorbed while adiabatic demagnetization when removing magnetic field heat thus obtain low temperature, the refrigeration of most of water dispenser
Water function is exactly to apply the principle.
As a preferred embodiment, as shown in Figure 1, liquid pipe 12 in bending coiled shape, with increase liquid pipe 12 with
The contact area of electromagnetic refrigeration module 11 improves heat exchange property.Optionally, liquid pipe 12 can be S-shaped or spiral yarn shaped
Shape.
It further include heating module 13, heating module 13 as one kind more preferably embodiment, liquid pipe denoising device 10
It is abutted against with liquid pipe 12.In a heating mode, to prevent low pressure excessive, can by 13 secondary lift system low pressure of heating module,
Guarantee heating comfort.More preferably, in the technical scheme of this embodiment, heating module 13 and 11 phase of electromagnetic refrigeration module
Neighbour's setting, liquid pipe 12 are set between heating module 13 and electromagnetic refrigeration module 11.In this way, heating module 13 and electromagnetic refrigeration mould
Block 11 can effectively be contacted with liquid pipe 12, in order to exchange heat.Optionally, in the technical scheme of this embodiment, heating module
13 be electromagnetism heating module.As other optional embodiments, heating module 13 or electrothermal heating module.
As another optional embodiment, it is also feasible for only retaining electromagnetic refrigeration module 11 and saving heating module 13
's.
In addition, according to the investigation for generating noise because of project installation to multi-connected machine, in a heating mode, due to Super long tube etc.
Reason, causes stress higher, and gaseous refrigerant flow velocity is very fast, forms high-speed jet since flow velocity is too fast and flows through internal structure
Afterwards, more strong howling is caused.Therefore, in the inventive solutions, for lead to indoor unit 40 tracheae also into
Noise reduction schemes design is gone.As shown in Figure 1, noise reducing apparatus further includes tracheae denoising device 20, tracheae denoising device 20 includes inhaling
Sound sound insulation module 21 and the tracheae 22 being arranged in sound-absorbing sound insulation module 21, the both ends of tracheae 22 are respectively formed air pipe inlet 221
With tracheae outlet 222.When in use, by air pipe inlet 221 and tracheae outlet 222 respectively with lead to indoor unit 40 tracheae phase
Even, the noise generated on tracheae will be absorbed by sound-absorbing sound insulation module 21, reduce the sending of noise on noise tracheae.Preferably,
Sound-absorbing sound insulation module 21 is mainly made of the attraction cotton being arranged in outside tracheae 22.
More preferably, as shown in Figure 1, being connected with denoiser 223 on tracheae 22, the refrigerant in tracheae 22 flows through denoiser
223 reduce noise.More preferably, denoiser 223 is efficient silencer, can be effectively to high speed gaseous refrigerant noise reduction.
As shown in Figure 1, further including controller 30, controller 30 as a kind of more preferably embodiment, noise reducing apparatus
It is electrically connected with electromagnetic refrigeration module 11 and heating module 13.When in use, by 30 input control logic of controller, Ke Yirang
Controller 30 controls the operation of electromagnetic refrigeration module 11 and heating module 13, realizes automation noise reduction.
As shown in Fig. 2, the air-conditioner set includes indoor unit 40 and outdoor unit the present invention also provides a kind of air-conditioner set
50, it is connected between indoor unit 40 and outdoor unit 50 by refrigerant pipeline, air-conditioner set further includes above-mentioned noise reducing apparatus, above-mentioned
Noise reducing apparatus is mounted on refrigerant pipeline.By the noise reducing apparatus, the effective noise reduction run to air-conditioner set may be implemented.It needs
Illustrate, technical solution of the present invention is particularly suitable for multi-gang air-conditioner unit, as shown in Fig. 2, noise reducing apparatus can be pacified
Branch path or the single indoor unit branch road for the branch pipe that outdoor unit comes out are filled, to allow noise reducing apparatus to be in system end noise reduction effect
Fruit is best.
As shown in figure 3, the control method is above-mentioned for controlling the present invention also provides a kind of control method of air-conditioner set
Air-conditioner set, control method includes refrigeration noise reduction mode, under the noise reduction mode that freezes, be greater than when the degree of supercooling of outdoor unit 50 or
The tube temperature degree that enters equal to first predetermined value or indoor unit 40 is less than second predetermined value, then opens electromagnetic refrigeration module 11；Work as room
The degree of supercooling of outer machine 50 is less than third predetermined value and the tube temperature degree that enters of indoor unit 40 is more than or equal to the 4th predetermined value, then closes electromagnetism
Refrigeration module 11.Optionally, first predetermined value be can be 20 DEG C, second predetermined value is 15 DEG C, and third predetermined value is 15 DEG C, the
Four predetermined values are 10 DEG C.It include subcooler in air-conditioner set, optionally, in the technical scheme of this embodiment, indoor unit 40
Enter tube temperature degree and is less than the liquid temperature control out for entering tube temperature degree and being less than the fluid-through tube of subcooler that second predetermined value is specially indoor unit 40
Two predetermined values；Optionally, in the technical scheme of this embodiment, the tube temperature degree that enters of indoor unit 40 has more than or equal to the 4th predetermined value
Body is four predetermined value of liquid temperature control out for entering tube temperature degree and being more than or equal to the fluid-through tube of subcooler of indoor unit 40.
More preferably, control method includes that heating auxiliary mode enters tube temperature degree when indoor unit 40 under auxiliary mode
Lower than the 5th predetermined value, and when the degree of supercooling of indoor unit 40 is greater than six predetermined values, heating module 13 is opened；Otherwise, system is closed
Thermal modules 13.Optionally, the 5th predetermined value is 25 DEG C, and the 6th predetermined value is 25 DEG C.
Apply the technical scheme of the present invention, for project installation characteristic, can effectively improve because degree of supercooling it is insufficient or
The technical issues of heating high-speed jet causes apparent airflow noise or howling.In effective refrigeration, raising is entered the room
The degree of supercooling of machine reduces high-speed jet, improves the user experience in heating.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the embodiment of the present invention can have various modifications and variations.All within the spirits and principles of the present invention, made
Any modification, equivalent substitution, improvement and etc. should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of noise reducing apparatus characterized by comprising
Liquid pipe denoising device (10), the liquid pipe denoising device (10) include electromagnetic refrigeration module (11) and are arranged in the electromagnetism
Liquid pipe (12) on refrigeration module (11), the both ends of the liquid pipe (12) are respectively formed liquid pipe entrance (121) and liquid pipe outlet
(122), the liquid pipe entrance (121) and liquid pipe outlet (122) with the liquid pipe for leading to indoor unit (40) for being connected respectively.
2. noise reducing apparatus according to claim 1, which is characterized in that the liquid pipe (12) is in bending coiled shape.
3. noise reducing apparatus according to claim 1, which is characterized in that the liquid pipe denoising device (10) further includes heating mould
Block (13), the heating module (13) abut against with the liquid pipe (12).
4. noise reducing apparatus according to claim 3, which is characterized in that the heating module (13) and the electromagnetic refrigeration mould
Block (11) is disposed adjacent, and the liquid pipe (12) is set between the heating module (13) and the electromagnetic refrigeration module (11).
5. noise reducing apparatus according to claim 3 or 4, which is characterized in that the heating module (13) is electromagnetic system hot-die
Block.
6. noise reducing apparatus according to claim 1, which is characterized in that the noise reducing apparatus further includes tracheae denoising device
(20), the tracheae denoising device (20) includes sound-absorbing sound insulation module (21) and is arranged in the sound-absorbing sound insulation module (21)
Tracheae (22), the both ends of the tracheae (22) are respectively formed air pipe inlet (221) and tracheae outlet (222), the air pipe inlet
(221) and tracheae outlet (222) with the tracheae for leading to indoor unit (40) for being connected respectively.
7. noise reducing apparatus according to claim 6, which is characterized in that denoiser (223) are connected on the tracheae (22),
Refrigerant in the tracheae (22), which flows through the denoiser (223), reduces noise.
8. noise reducing apparatus according to claim 3, which is characterized in that the noise reducing apparatus further includes controller (30), institute
It states controller (30) to be electrically connected with the electromagnetic refrigeration module (11) and the heating module (13), the controller (30) is used for
Control the operation of the electromagnetic refrigeration module (11) and the heating module (13).
9. a kind of air-conditioner set, including indoor unit (40) and outdoor unit (50), the indoor unit (40) and the outdoor unit (50)
Between by refrigerant pipeline be connected, which is characterized in that the air-conditioner set further includes described in any item of the claim 1 to 8
Noise reducing apparatus, the noise reducing apparatus are mounted on the refrigerant pipeline.
10. a kind of control method of air-conditioner set, which is characterized in that the control method is as claimed in claim 9 for controlling
Air-conditioner set, the control method include:
Freeze noise reduction mode, when the degree of supercooling of the outdoor unit (50) is greater than or equal to first predetermined value or the indoor unit
(40) the tube temperature degree that enters is less than second predetermined value, then opens the electromagnetic refrigeration module (11)；When the mistake of the outdoor unit (50)
Cold degree is less than third predetermined value and the tube temperature degree that enters of the indoor unit (40) is more than or equal to the 4th predetermined value, then closes the electromagnetism
Refrigeration module (11).
11. control method according to claim 10, which is characterized in that the liquid pipe denoising device (10) further includes heating
Module (13), the heating module (13) abut against with the liquid pipe (12), and the control method includes:
Auxiliary mode is heated, enters tube temperature degree lower than the 5th predetermined value when the indoor unit (40), and the indoor unit (40)
When degree of supercooling is greater than six predetermined values, the heating module (13) are opened；Otherwise, the heating module (13) are closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910562760.4A CN110285565A (en) | 2019-06-26 | 2019-06-26 | Noise reduction equipment, air conditioning unit and control method of air conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910562760.4A CN110285565A (en) | 2019-06-26 | 2019-06-26 | Noise reduction equipment, air conditioning unit and control method of air conditioning unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110285565A true CN110285565A (en) | 2019-09-27 |
Family
ID=68006166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910562760.4A Pending CN110285565A (en) | 2019-06-26 | 2019-06-26 | Noise reduction equipment, air conditioning unit and control method of air conditioning unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110285565A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115468243A (en) * | 2022-08-24 | 2022-12-13 | 珠海格力电器股份有限公司 | Water chilling unit and air conditioner |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115468243A (en) * | 2022-08-24 | 2022-12-13 | 珠海格力电器股份有限公司 | Water chilling unit and air conditioner |
| CN115468243B (en) * | 2022-08-24 | 2024-08-16 | 珠海格力电器股份有限公司 | Water chilling unit and air conditioner |
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Application publication date: 20190927 |