CN113218054A - Multi-split air conditioning system and defrosting method thereof - Google Patents
Multi-split air conditioning system and defrosting method thereof Download PDFInfo
- Publication number
- CN113218054A CN113218054A CN202110538930.2A CN202110538930A CN113218054A CN 113218054 A CN113218054 A CN 113218054A CN 202110538930 A CN202110538930 A CN 202110538930A CN 113218054 A CN113218054 A CN 113218054A
- Authority
- CN
- China
- Prior art keywords
- defrosting
- outdoor unit
- conditioning system
- outdoor
- electric ball
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
-
- 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
- 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
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)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of air conditioners, in the heating process, when one outdoor unit reaches a defrosting condition, the multi-split air conditioning system and the defrosting method thereof only need to switch a four-way valve of the outdoor unit, the pressure in a pipeline is adjusted through an electric ball valve, the damage of a compressor of the outdoor unit is avoided, one part of high-temperature and high-pressure gaseous refrigerants generated by compressors of outdoor units in other non-defrosting modes flows into an air suction port of the outdoor compressor after being subjected to pressure reduction through the electric ball valve, and the other part of the high-temperature and high-pressure gaseous refrigerants still pass through an indoor heat exchange side to be heated, so that the problem that the temperature of a coil pipe on the indoor heat exchange side is reduced when the multi-split air conditioning system is defrosted, and the heating effect is influenced is solved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-split air conditioner system and a defrosting method thereof.
Background
The multiple on-line air-conditioning system accounts for more than 40% of the central air-conditioning market, and the multiple on-line air-conditioning system is an air-conditioning system comprising a plurality of outdoor units and at least one indoor unit. Traditional many online air conditioning system heats mode during operation, when one in the off-premises station need defrost, whole air conditioning system all can get into defrost mode, all off-premises stations all get into defrost mode, namely, the cross valve switching-over of off-premises station, get into refrigeration mode, the high temperature high pressure refrigerant flows through indoor heat exchange side, make the coil pipe temperature of indoor heat exchange side reduce, then can not reach indoor heating effect this moment, influence user experience, the cross valve of off-premises station commutates once more after the defrosting, get into heating mode, the coil pipe temperature of indoor heat exchange side slowly rises, reach and give indoor heat supply once more after setting for the temperature. In the heating process, different outdoor units have different frosting conditions, so that the outdoor unit which does not need defrosting also enters a defrosting mode, and energy is wasted.
In the existing air conditioning system, a D interface and an S interface of a four-way valve are connected with a compressor, a C interface is connected with an indoor heat exchange side, and an E interface is connected with an outdoor heat exchange side.
Disclosure of Invention
The technical problems solved by the invention are as follows: the multi-split air-conditioning system and the defrosting method thereof solve the problem that when the multi-split air-conditioning system is defrosted, the temperature of a coil pipe at the indoor heat exchange side is reduced, so that the heating effect is influenced.
The invention adopts the technical scheme for solving the technical problems that: the multi-split air conditioning system comprises a plurality of outdoor units, wherein a C interface of a four-way valve of each outdoor unit is connected with one end of an electric ball valve, the other end of each electric ball valve is communicated with each other and is connected to one end of an indoor heat exchange side, the electric ball valves are used for adjusting the pressure in a pipeline, one ends of the heat exchange sides of all the outdoor units are connected together and are connected to the other end of the indoor heat exchange side, and the other ends of the heat exchange sides of all the outdoor units are connected with a corresponding E interface of the four-way valve.
Further, the defrosting method of the system comprises the following steps:
s01, the multi-split air conditioning system is in a heating mode, and when the outdoor unit reaches a defrosting condition, the multi-split air conditioning system enters the defrosting mode;
s02, selecting one of the outdoor units needing defrosting to defrost, and not entering the defrosting mode by the other outdoor units;
s03, closing the electric ball valve of the selected outdoor unit, and switching the four-way valve of the outdoor unit to enable the outdoor unit to be in a defrosting mode;
s04, opening the electric ball valve for a certain number of steps to defrost;
s05, after defrosting is finished, closing the electric ball valve, and switching the four-way valve to enable the outdoor unit to enter a heating mode;
and S06, fully opening the electric ball valve of the outdoor unit.
Further, the number of steps of opening the electric ball valve at step S04 is adjusted according to the outdoor unit low pressure data requiring defrosting.
The invention has the beneficial effects that: when one outdoor unit reaches a defrosting condition in the heating process, the multi-split air conditioning system and the defrosting method thereof only need to switch the four-way valve of the outdoor unit, the pressure in the pipeline is adjusted through the electric ball valve, the damage of the compressor of the outdoor unit is avoided, one part of high-temperature and high-pressure gaseous refrigerant generated by the compressors of the outdoor units in other non-defrosting modes flows into the air suction port of the outdoor compressor after being subjected to pressure reduction through the electric ball valve, and the other part of the high-temperature and high-pressure gaseous refrigerant still performs heating through the indoor heat exchange side, so that the problem that the heating effect is influenced due to the fact that the temperature of a coil pipe at the indoor heat exchange side is reduced when the multi-split air conditioning system performs defrosting is solved.
Drawings
Fig. 1 is a schematic view illustrating a partial connection relationship of a multi-split air conditioning system including two outdoor units and one indoor unit in an embodiment of a multi-split air conditioning system and a defrosting method thereof according to the present invention.
Detailed Description
The multi-split air conditioning system comprises a plurality of outdoor units, wherein a C interface of a four-way valve of each outdoor unit is connected with one end of an electric ball valve, the other end of each electric ball valve is communicated with each other and is connected to one end of an indoor heat exchange side, the electric ball valves are used for adjusting the pressure in a pipeline, one ends of the heat exchange sides of all the outdoor units are connected together and are connected to the other end of the indoor heat exchange side, and the other ends of the heat exchange sides of all the outdoor units are connected with a corresponding E interface of the four-way valve.
The defrosting method of the system comprises the following steps:
s01, the multi-split air conditioning system is in a heating mode, and when the outdoor unit reaches a defrosting condition, the multi-split air conditioning system enters the defrosting mode;
s02, selecting one of the outdoor units needing defrosting to defrost, and not entering the defrosting mode by the other outdoor units;
s03, closing the electric ball valve of the selected outdoor unit, and switching the four-way valve of the outdoor unit to enable the outdoor unit to be in a defrosting mode;
s04, opening the electric ball valve for a certain number of steps to defrost;
s05, after defrosting is finished, closing the electric ball valve, and switching the four-way valve to enable the outdoor unit to enter a heating mode;
and S06, fully opening the electric ball valve of the outdoor unit.
Further, the number of steps of opening the electric ball valve at step S04 is adjusted according to the outdoor unit low pressure data requiring defrosting.
Example (b):
taking a multi-split air conditioning system comprising two outdoor units and one indoor unit as an example, the two outdoor units of the multi-split air conditioning system are respectively designated as a first outdoor unit and a second outdoor unit, the four-way valve in the first outdoor unit is designated as a first four-way valve, the four-way valve in the second outdoor unit is designated as a second four-way valve, the connection relationship is as shown in figure 1, the C interface of the first four-way valve is connected with one end of the first electric ball valve, the C interface of the second four-way valve is connected with one end of the second electric ball valve, the other end of the first electric ball valve and the other end of the second electric ball valve are connected with each other and are connected with one end of the heat exchange side of the indoor unit, the E interface of the first four-way valve is connected with one end of the first outdoor heat exchange side, the E interface of the second four-way valve is connected with one end of the second outdoor heat exchange side, and the other end of the first outdoor heat exchange side and the other end of the second outdoor heat exchange side are connected with each other and are connected with the other end of the heat exchange side of the indoor unit.
The defrosting method of the multi-split air conditioning system comprises the following steps:
s01, the multi-split air conditioning system is in a heating mode, and when the outdoor unit reaches a defrosting condition, the multi-split air conditioning system enters the defrosting mode;
s02, selecting one of the outdoor units needing defrosting to defrost, and not entering the defrosting mode by the other outdoor units;
s03, closing the electric ball valve of the selected outdoor unit, and switching the four-way valve of the outdoor unit to enable the outdoor unit to be in a defrosting mode;
s04, opening the electric ball valve for a certain number of steps to defrost;
s05, after defrosting is finished, closing the electric ball valve, and switching the four-way valve to enable the outdoor unit to enter a heating mode;
and S06, fully opening the electric ball valve of the outdoor unit.
The refrigerant flow direction of the multi-split air conditioning system in the heating mode is as follows:
high-temperature and high-pressure gaseous refrigerant produced by the compressor of the first outdoor unit and high-temperature and high-pressure gaseous refrigerant produced by the compressor of the second outdoor unit are converged by the first electric ball valve and then flow to the indoor heat exchange side together to heat the indoor space, the heat released by the high-temperature and high-pressure gaseous refrigerant is changed into gas-liquid mixed refrigerant which flows to the first outdoor heat exchange side and the second outdoor heat exchange side respectively, part of the gas-liquid mixed refrigerant absorbs outdoor heat through the first outdoor heat exchange side and flows back to the first outdoor compressor through an E interface of the first four-way valve, and the other part of the gas-liquid mixed refrigerant absorbs outdoor heat through the second outdoor heat exchange side and flows back to the second outdoor compressor through an E interface of the second four-way valve, so that circulation is formed, and the heating effect is achieved.
The refrigerant flow direction for defrosting in the heating mode of the multi-split air conditioning system is as follows:
taking defrosting of the first outdoor unit as an example, after a high-temperature high-pressure gaseous refrigerant generated by a compressor of the second outdoor unit passes through the second electric ball valve, a part of the high-temperature high-pressure gaseous refrigerant flows to the first electric ball valve and flows back to the first outdoor compressor through a port C of the four-way valve, and the high-temperature high-pressure refrigerant generated by the first outdoor compressor flows through the first outdoor heat exchange side to defrost the first outdoor unit and then is changed into a gas-liquid mixed refrigerant; the other part of the refrigerant flows to the indoor heat exchange side, becomes a gas-liquid mixed refrigerant after heating the indoor, is converged with the gas-liquid mixed refrigerant after defrosting of the first outdoor unit and flows to the second outdoor heat exchange side, and flows back to the compressor of the second outdoor unit through the E interface of the second four-way valve to form circulation, so that the effect of heating the indoor is achieved, and the defrosting of the first outdoor unit is also achieved.
The electric ball valve is to prevent the compressor of the outdoor unit requiring defrosting from being damaged due to the high pressure of the refrigerant at the suction end, so the number of steps of opening the electric ball valve in step S04 is adjusted according to the low pressure data of the outdoor unit requiring defrosting.
Claims (3)
1. The multi-split air conditioning system comprises a plurality of outdoor units and is characterized in that a C interface of a four-way valve of each outdoor unit is connected with one end of a corresponding electric ball valve, the other end of each electric ball valve is communicated with each other and is connected to one end of an indoor heat exchange side, the electric ball valves are used for adjusting pressure in pipelines, one ends of the heat exchange sides of all the outdoor units are connected together and are connected to the other end of the indoor heat exchange side, and the other ends of the heat exchange sides of all the outdoor units are connected with an E interface of the four-way valve corresponding to the outdoor units.
2. A defrosting method of a multi-split air conditioning system applied to the multi-split air conditioning system as set forth in claim 1, comprising the steps of:
s01, the multi-split air conditioning system is in a heating mode, and when the outdoor unit reaches a defrosting condition, the multi-split air conditioning system enters the defrosting mode;
s02, selecting one of the outdoor units needing defrosting to defrost, and not entering the defrosting mode by the other outdoor units;
s03, closing the electric ball valve of the selected outdoor unit, and switching the four-way valve of the outdoor unit to enable the outdoor unit to be in a defrosting mode;
s04, opening the electric ball valve for a certain number of steps to defrost;
s05, after defrosting is finished, closing the electric ball valve, and switching the four-way valve to enable the outdoor unit to enter a heating mode;
and S06, fully opening the electric ball valve of the outdoor unit.
3. The defrosting method of a multi-split air conditioning system as claimed in claim 2, wherein the number of steps of opening the electric ball valve in the step S04 is adjusted according to outdoor unit low pressure data to be defrosted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110538930.2A CN113218054A (en) | 2021-05-18 | 2021-05-18 | Multi-split air conditioning system and defrosting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110538930.2A CN113218054A (en) | 2021-05-18 | 2021-05-18 | Multi-split air conditioning system and defrosting method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113218054A true CN113218054A (en) | 2021-08-06 |
Family
ID=77092592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110538930.2A Pending CN113218054A (en) | 2021-05-18 | 2021-05-18 | Multi-split air conditioning system and defrosting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113218054A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113932473A (en) * | 2021-11-24 | 2022-01-14 | 宁波奥克斯电气股份有限公司 | Multi-machine parallel low-temperature heat pump defrosting device, defrosting method and air conditioner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203385089U (en) * | 2013-07-08 | 2014-01-08 | 南京天加空调设备有限公司 | Modularized multi-split air-conditioning system |
| CN104748464A (en) * | 2013-12-25 | 2015-07-01 | 珠海格力电器股份有限公司 | Multi-online defrosting method and device for air conditioning system and air conditioner |
| CN205619615U (en) * | 2016-05-05 | 2016-10-05 | 广东志高暖通设备股份有限公司 | Multi -split air conditioning system |
-
2021
- 2021-05-18 CN CN202110538930.2A patent/CN113218054A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203385089U (en) * | 2013-07-08 | 2014-01-08 | 南京天加空调设备有限公司 | Modularized multi-split air-conditioning system |
| CN104748464A (en) * | 2013-12-25 | 2015-07-01 | 珠海格力电器股份有限公司 | Multi-online defrosting method and device for air conditioning system and air conditioner |
| CN205619615U (en) * | 2016-05-05 | 2016-10-05 | 广东志高暖通设备股份有限公司 | Multi -split air conditioning system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113932473A (en) * | 2021-11-24 | 2022-01-14 | 宁波奥克斯电气股份有限公司 | Multi-machine parallel low-temperature heat pump defrosting device, defrosting method and air conditioner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1703230B1 (en) | Multi type air-conditioner and control method thereof | |
| KR100484802B1 (en) | Frost removing method of air conditioner hanving two compressor | |
| CN110425764B (en) | Heat exchange system and control method | |
| CN109945330B (en) | Refrigerating system capable of continuously heating and defrosting control method | |
| US20060117770A1 (en) | Multi-air condition system and method for controlling the same | |
| CN109959120A (en) | The Defrost method and air conditioner of air conditioner | |
| CN109990499B (en) | Gas heat pump air conditioning system without shutdown during defrosting | |
| CN110425765B (en) | Heat exchange system and control method | |
| CN106765617B (en) | Air injection enthalpy-increasing heat pump air conditioning system, control method, control device and air conditioner | |
| CN105972773A (en) | Air conditioning system and defrosting control method thereof | |
| CN107421072A (en) | Air conditioner and high-temperature-resistant control method thereof | |
| CN105003982A (en) | Air conditioning system and control method thereof | |
| CN105605820B (en) | Heat pump system | |
| CN113218054A (en) | Multi-split air conditioning system and defrosting method thereof | |
| CN110631286B (en) | Heat exchange system and control method | |
| CN103388881A (en) | Heat pump and air-conditioning system as well as control method thereof | |
| CN106931547B (en) | Air conditioning system and control method thereof | |
| CN109737635B (en) | Heat pump air conditioning system of electric automobile | |
| CN110332618A (en) | Outdoor unit with continuous heating function, air conditioning system and control method | |
| CN110595093A (en) | Air conditioning system | |
| EP4083522A1 (en) | Multi-outdoor unit parallel type non-reversing defrosting system and defrosting control method thereof | |
| CN210425298U (en) | Outdoor unit with continuous heating function and air conditioning system | |
| CN102538272A (en) | Air conditioning system and defrosting method thereof | |
| CN210070287U (en) | Segmented defrosting system | |
| CN209558719U (en) | A kind of two-stage enthalpy increasing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210806 |