CN114719412A - Control method for improving multi-split heating comfort - Google Patents
Control method for improving multi-split heating comfort Download PDFInfo
- Publication number
- CN114719412A CN114719412A CN202210263495.1A CN202210263495A CN114719412A CN 114719412 A CN114719412 A CN 114719412A CN 202210263495 A CN202210263495 A CN 202210263495A CN 114719412 A CN114719412 A CN 114719412A
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- China
- Prior art keywords
- indoor unit
- rotating speed
- fan
- control method
- temperature difference
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Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000010438 heat treatment Methods 0.000 title claims abstract description 10
- 239000007788 liquid Substances 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
Classifications
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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
- 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
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- 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
- F24F11/77—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 by controlling the speed of ventilators
-
- 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
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)
- Fluid Mechanics (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method for improving the heating comfort of a multi-split air conditioner, which comprises the following steps of 1) detecting and judging the indoor unit with the minimum capacity and the maximum temperature difference in the started indoor units; step 2) detecting whether the high-pressure value of the system is higher than a set value f1 or not through set time t0, and if the high-pressure value is higher than a set value f1, starting a fan of the indoor unit with the minimum energy and the maximum temperature difference in the indoor unit to a set rotating speed V1; step 3) continuously detecting whether the high-pressure value of the system is higher than a set value f1 after a set time t0, if so, starting the fan of the indoor unit with the minimum energy and the maximum temperature difference in the indoor unit to a set rotating speed V2, if not, maintaining the current rotating speed, and repeating the step 3) until the fan reaches the set rotating speed V2; and 4) repeating the step 2) and the step 3), and sequentially starting the fans of the other indoor units to reach the set rotating speed V2. The invention preferentially starts the indoor unit with the minimum energy and the maximum temperature difference in the system, thereby ensuring the comfort of each room.
Description
Technical Field
The invention relates to a control method for improving the thermal comfort of a multi-connected machine.
Background
The multi-split air conditioner is commonly called as one-to-many air conditioner, that is, one outdoor unit can be connected with a plurality of indoor units to realize a system for refrigerating or heating a single room or a plurality of rooms.
For the multi-split air conditioner to heat in winter in the prior art, if the indoor unit is fully opened to heat, the requirement that the compressor is started and operated for a period of time is met, if the temperature sensing package of the coil pipe of the indoor unit reaches a certain temperature value, the fan of the indoor unit is started, at the moment, due to heat exchange of all indoor fans, the system pressure is rapidly reduced, namely, hot air is rapidly reduced and cold air is changed to cause poor comfort of a human body, when the temperature is reduced, some manufacturers control the indoor fans to rapidly shut down, when the temperature is increased, the fans are started again, but the fans are started and shut back, and the requirement on the comfort of the human body is difficult to meet.
Disclosure of Invention
In view of the above problems, the present invention provides a control method for improving the comfort of heating multiple connected air conditioners, which effectively solves the problems pointed out in the background art.
The technical scheme adopted by the invention is as follows:
a control method for improving the heat comfort of a multi-connected machine is characterized in that when a heating mode is started, the following control is carried out:
step 1), detecting and judging the indoor unit with the minimum capacity and the maximum temperature difference in the started indoor units;
step 2), detecting whether the high-pressure value of the system is higher than a set value f1 or not through set time t0, and if the high-pressure value is higher than a set value f1, starting a fan of the indoor unit with the minimum energy and the maximum temperature difference in the indoor unit to a set rotating speed V1;
step 3), continuously detecting whether the high-pressure value of the system is higher than a set value f1 after a set time t0, if so, starting the fan of the indoor unit with the minimum energy and the maximum temperature difference in the indoor unit to a set rotating speed V2, if not, maintaining the current rotating speed, and repeating the step 3) until the fan reaches the set rotating speed V2;
and 4) repeating the step 2) and the step 3), and sequentially starting the fans of the other indoor units to a set rotating speed V2.
Preferably, in the step 4), when the fans of the other indoor units are started, the fans are started in sequence from small to large according to the capacity.
Preferably, t0 is 30 s.
Preferably, f1 is 2.5 MPa.
Preferably, the V1 is 30% of the fan speed or the lowest gear speed.
Preferably, the V2 is 60% of the fan speed or the user set windshield.
In winter heating, when the indoor unit is fully or partially started, and after the compressor is started to operate for a period of time, and the high pressure of the system meets a set pressure value, the 30% revolution of the indoor unit fan with the minimum internal energy and the maximum temperature difference in the system is started preferentially, or the system is allowed to operate in the most resistant mode; and after the operation is carried out for 30 seconds, if the pressure of the outdoor system is detected to continuously rise and reach a set pressure value, the revolution of the indoor unit fan is increased by 60%, or the operation is continued according to the set windshield of the user.
And after the system is operated for 30 seconds again, if the system pressure continuously rises again, the indoor units are sequentially started from small to large according to the starting capacity, namely the capacity of the started indoor units is sequentially started at 30% of revolution or the lowest-gear revolution, and if the system pressure continuously rises, the current revolution of the indoor units is increased by 60%, or the indoor units are operated according to the setting of a user.
The indoor unit with the minimum internal energy and the maximum temperature difference in the system is started preferentially, the indoor heat release is small, the high-pressure and the exhaust temperature of the system are easily and quickly increased, the maximum temperature difference is also the most urgent requirement of customer requirements, in addition, the requirement of the room is quickly met by increasing the revolution number of the indoor direct current motor from low to high, when the system pressure quickly rises, the indoor units in the system are sequentially started according to the capacity from small to large, the continuous rise of the high-pressure of the system is ensured, the cold air condition caused by the reduction of the system pressure due to the full opening of the indoor units is avoided, finally, the system pressure judgment and the indoor capacity judgment are carried out, the revolution number of the fan is increased along with the increase of the system pressure, the linear rise of the temperature of all rooms is integrally met, and the comfort of each room is ensured.
Detailed Description
The present invention is described in further detail below with reference to specific examples.
Example 1
A control method for improving the heat comfort of a multi-connected machine is characterized in that when a heating mode is started, the following control is carried out:
step 1), detecting and judging the indoor unit with the minimum capacity and the maximum temperature difference in the started indoor units;
step 2), detecting whether the high-pressure value of the system is higher than a set value by 2.5Mpa after a set time of 30s, if so, starting a fan of the indoor unit with the minimum capacity and the maximum temperature difference in the indoor unit to a set rotating speed V1, wherein V1 is 30% of the rotating speed of the fan or the lowest-gear rotating speed;
step 3), continuously detecting whether the high-pressure value of the system is higher than a set value of 2.5Mpa after the set time is 30s, if so, starting the fan of the indoor unit with the minimum capacity and the maximum temperature difference in the indoor unit to a set rotating speed V2, if not, keeping the current rotating speed if V2 is 60% of the rotating speed of the fan or a user-set windshield, and repeating the step 3) until the fan reaches the set rotating speed V2;
and 4) repeating the step 2) and the step 3), and starting the fans of the other indoor units to a set rotating speed V2 from small to large according to the capacity.
The outdoor unit comprises a compressor, an oil separator, a one-way valve, a four-way valve, a gas-liquid separator, an oil return capillary tube, a heat exchanger, a liquid accumulator, a main expansion valve, an economizer and a fan, wherein the economizer, the main expansion valve, the liquid accumulator, the heat exchanger, the gas-liquid separator, the compressor, the oil separator and the one-way valve are sequentially arranged from one end of a refrigerant inlet of the outdoor unit to one end of a refrigerant outlet, the spaces between the heat exchanger and the gas-liquid separator and between the one-way valve and the refrigerant outlet of the outdoor unit are communicated through the four-way valve, the oil separator is connected with the inlet of the compressor through the oil return capillary tube, one path of outlet of the economizer is connected with the compressor, and the outdoor unit is provided with a system low-pressure sensor and a system high-pressure sensor.
Finally, it should be noted that the above-mentioned list is only the specific embodiment of the present invention. It is apparent that the present invention is not limited to the above embodiment, and many modifications are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (6)
1. A control method for improving the multi-connected machine heating comfort is characterized in that when a heating mode is started, the following control is performed:
step 1), detecting and judging the indoor unit with the minimum capacity and the maximum temperature difference in the started indoor units;
step 2), detecting whether the high-pressure value of the system is higher than a set value f1 after a set time t0, and if the high-pressure value is higher than a set value f1, starting a fan of the indoor unit with the minimum energy and the maximum temperature difference in the indoor unit to a set rotating speed V1;
step 3), continuously detecting whether the high-pressure value of the system is higher than a set value f1 after a set time t0, if so, starting the fan of the indoor unit with the minimum energy and the maximum temperature difference in the indoor unit to a set rotating speed V2, if not, maintaining the current rotating speed, and repeating the step 3) until the fan reaches the set rotating speed V2;
and 4) repeating the step 2) and the step 3), and sequentially starting the fans of the other indoor units to a set rotating speed V2.
2. The control method for improving the thermal comfort of a multi-split system according to claim 1, wherein in the step 4), when fans of the other indoor units are turned on, the fans are turned on in sequence from small to large according to the capacity.
3. The control method for improving the thermal comfort of a multi-split system according to claim 1, wherein t0 is 30 s.
4. The control method for improving the thermal comfort of a multi-split system according to claim 1, wherein f1 is 2.5 Mpa.
5. The control method for improving the thermal comfort of a multi-split system as recited in claim 1, wherein the V1 is 30% of the fan speed or the lowest gear speed.
6. The control method for improving the thermal comfort of a multi-split system as claimed in claim 1, wherein the V2 is 60% of fan speed or a user-set windshield.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210263495.1A CN114719412B (en) | 2022-03-17 | 2022-03-17 | Control method for improving heating comfort of multi-connected machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210263495.1A CN114719412B (en) | 2022-03-17 | 2022-03-17 | Control method for improving heating comfort of multi-connected machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114719412A true CN114719412A (en) | 2022-07-08 |
| CN114719412B CN114719412B (en) | 2023-08-22 |
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| CN202210263495.1A Active CN114719412B (en) | 2022-03-17 | 2022-03-17 | Control method for improving heating comfort of multi-connected machine |
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| JP2005241019A (en) * | 2004-02-24 | 2005-09-08 | Fujitsu General Ltd | Control method for air conditioner |
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2022
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| JP2005241019A (en) * | 2004-02-24 | 2005-09-08 | Fujitsu General Ltd | Control method for air conditioner |
| CN102788405A (en) * | 2012-08-03 | 2012-11-21 | 宁波奥克斯电气有限公司 | Start control method of fast refrigerating and fast heating for direct current variable frequency air conditioner |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN114719412B (en) | 2023-08-22 |
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