CN104457048A - Air conditioning refrigeration system and control method - Google Patents
Air conditioning refrigeration system and control method Download PDFInfo
- Publication number
- CN104457048A CN104457048A CN201410811385.XA CN201410811385A CN104457048A CN 104457048 A CN104457048 A CN 104457048A CN 201410811385 A CN201410811385 A CN 201410811385A CN 104457048 A CN104457048 A CN 104457048A
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- Prior art keywords
- temperature
- valve
- refrigeration system
- conditioning refrigeration
- temperature sensor
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control 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
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to an air conditioning refrigeration system. The air conditioning refrigeration system comprises an evaporator, a compressor, a throttling valve and a condenser which are communicated in sequence, wherein the throttling valve is arranged between the evaporator and the condenser. The air conditioning refrigeration system further comprises a bypass branch in parallel connection with the throttling valve and an on-off valve capable of opening or closing the bypass branch. The invention further relates to a control method of the air conditioning refrigeration system. According to the air conditioning refrigeration system, the additional on-off valve connected to the position of a traditional throttling valve in parallel is adopted between the evaporator and the condenser, so that under the situation that the cost is effectively controlled, refrigerating output is adjusted to improve refrigerating capacity of a unit according to different operation situations. In addition, under the situation that outdoor temperature is low, the air conditioning refrigeration system can also timely regulate evaporating pressure and improve the operation reliability of an air conditioner in a machine room when the outdoor temperature is low.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly a kind of air-conditioning refrigeration system and control method.
Background technology
Normal application refrigeration system throttling arrangement on air conditioner in machine room unit.Throttling arrangement plays a part very crucial in systems in which, and the throttle mechanism suitable by selective gist and Refrigeration system matching are the important rings that whole refrigeration plant reduces energy consumption.But, the impact of throttle system specification is often received in prior art, when cooling system demand is larger, traditional throttling arrangement often can not meet regulatory demand, the air conditioner in machine room refrigerating capacity that cold so just can be caused larger is not enough, the situation that complete machine operational factor is undesirable, changes throttle system according to different refrigerating capacities and too increases unit manufacturing cost and extend the unit development cycle.
In addition; air conditioner in machine room is when outdoor temperature is lower; the situation of restarting after may there is compressor shutdown a period of time; because outdoor temperature is lower than temperature in machine room; cold-producing medium there will be the transport phenomena flowing to condenser from evaporimeter; within a period of time of compressor start, occur that pressure of inspiration(Pi) is too low, the situation that compressor air suction amount is few, this situation can reduce the reliability of compressor operating.
Summary of the invention
An aspect of of the present present invention object is to provide a kind of air-conditioning refrigeration system and control method, to improve air conditioner refrigerating ability; The object of another aspect of the present invention is to provide a kind of air-conditioning refrigeration system and control method, to improve the reliability of the compressor operating of unit.
The present invention proposes a kind of air-conditioning refrigeration system, comprise the evaporimeter, compressor, choke valve and the condenser that are communicated with successively, described choke valve is arranged between described evaporimeter and condenser, also comprise the bypass branch in parallel with described choke valve, and can open or close the on-off valve of described bypass branch.
Further, also comprise the first temperature sensor and second temperature sensor at the entrance and exit place laying respectively at described evaporimeter, described first temperature sensor is for detecting the temperature of described entrance, and described second temperature sensor is for detecting the temperature of described outlet; When the difference of the temperature of described outlet and described entrance is greater than the default temperature difference, described on-off valve is opened.
Further, also comprise pressure sensor, this pressure sensor is for detecting the pressure of inspiration(Pi) of described compressor; When described pressure of inspiration(Pi) is less than preset pressure, described on-off valve is opened.
Further, also comprise outdoor temperature sensor, described outdoor temperature sensor is for detecting outdoor temperature; When the temperature that described outdoor temperature sensor detects is less than preset temperature and the described compressor shutdown time is greater than preset duration, described choke valve and described on-off valve are all closed.
Further, described on-off valve comprises the first normally closed solenoid valve.
Further, described on-off valve also comprises second normally closed solenoid valve in parallel with described first normally closed solenoid valve.
Further, described on-off valve comprises the capillary of connecting with described first normally closed solenoid valve and/or the second normally closed solenoid valve, and described capillary can increase the mass flow of the cold-producing medium entering described evaporimeter.
The present invention also proposes a kind of control method of above-mentioned air-conditioning refrigeration system, described air-conditioning refrigeration system comprises the first temperature sensor and second temperature sensor at the entrance and exit place laying respectively at described evaporimeter, described first temperature sensor is for detecting the temperature of described entrance, and described second temperature sensor is for detecting the temperature of described outlet;
Detected the temperature of described evaporator inlet by described first temperature sensor, and detect the temperature of described evaporator outlet by described second temperature sensor;
The size of more described inlet temperature and outlet temperature, if the difference of the temperature of described outlet and described entrance is more than or equal to the default temperature difference, opens described on-off valve, opens the bypass branch at described on-off valve place.
Further, described air-conditioning refrigeration system also comprises pressure sensor, and this pressure sensor is for detecting the pressure of inspiration(Pi) of described compressor;
Detected the pressure of inspiration(Pi) of described compressor by described pressure sensor, more described pressure of inspiration(Pi) and preset pressure, if described pressure of inspiration(Pi) is less than preset pressure, then open described on-off valve, open the bypass branch at described on-off valve place.
Further, described air-conditioning refrigeration system also comprises outdoor temperature sensor, and described outdoor temperature sensor is for detecting outdoor temperature;
Detect outdoor temperature by described outdoor temperature sensor, compare detected outdoor temperature and preset temperature, and calculate the downtime of described compressor when described compressor shutdown; When detected outdoor temperature is less than preset temperature, and when the described compressor shutdown time calculated is greater than preset duration, described choke valve and described on-off valve are all closed.
Beneficial effect of the present invention is as follows:
Air-conditioning refrigeration system of the present invention have employed the extra on-off valve in traditional choke valve place parallel connection between evaporimeter and condenser, when effectively controlling cost, regulating refrigerating capacity according to different ruuning situation, improving unit refrigerating capacity.In addition when outdoor temperature is lower, the present invention also can regulate evaporating pressure in time, improves the operational reliability of air conditioner in machine room when outdoor temperature is lower.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the first specific embodiment of air-conditioning refrigeration system of the present invention.
Fig. 2 is the schematic diagram of the second specific embodiment of air-conditioning refrigeration system of the present invention.
Fig. 3 is the schematic diagram of the 3rd specific embodiment of air-conditioning refrigeration system of the present invention.
Fig. 4 is the schematic diagram of the 4th specific embodiment of air-conditioning refrigeration system of the present invention.
Detailed description of the invention
Fig. 1 shows the first specific embodiment of air-conditioning refrigeration system of the present invention.
As shown in Figure 1, the air-conditioning refrigeration system of the present embodiment, comprise the evaporimeter 11, compressor 1, choke valve 6 and the condenser 3 that connect successively, described choke valve 6 is arranged between described evaporimeter 11 and condenser 3, also comprise the bypass branch in parallel with described choke valve 6 and first normally closed solenoid valve 7 that as on-off valve use in parallel with described choke valve 6, described first normally closed solenoid valve 7 can be opened under certain condition.
Certain condition mentioned here refers to, the outlet of evaporimeter 11 and the temperature of entrance, opening the first normally closed solenoid valve 7 according to the outlet of evaporimeter 11 and the temperature difference of entrance is a kind of simple and methods of lower-cost quick adjustment refrigerant flow, particularly, after a period of time started shooting by compressor, such as, after 30min, described second temperature sensor 13 is for detecting the temperature of described outlet; When the difference of the temperature of described outlet and described entrance is greater than the default temperature difference, such as these temperature difference >=10 DEG C, then open the first normally closed solenoid valve 7 thus connect the bypass branch at its place.As temperature difference < 2 DEG C, then close the first normally closed solenoid valve 7 thus cut off the bypass branch at its place.
In addition, certain condition involved above also can be the pressure of inspiration(Pi) size of compressor 1.As shown in Figure 1, can also comprise pressure sensor 14 in system, this pressure sensor 14 is for detecting the pressure of inspiration(Pi) of described compressor 1; When described pressure of inspiration(Pi) is less than preset pressure P1, described first normally closed solenoid valve 7 is opened.Here P1 is according to the difference of refrigerant type, and its value is also different.In one embodiment, P1 meets condition below: for the unit using cold-producing medium R22, R407C, P1 is 0.5MPa; For the unit using cold-producing medium R410A, P1 is 0.79MPa; For the unit using refrigerant R134a, P1 is 0.29MPa.
In order to ensure this air-conditioning refrigeration system operational reliability at low temperatures, the air-conditioning refrigeration system of the present embodiment also comprises, and also comprises outdoor temperature sensor 2, and described outdoor temperature sensor 2 is for detecting outdoor temperature; The temperature detected when described outdoor temperature sensor 2 is less than preset temperature; such as-15 DEG C; and described compressor 1 is when being greater than preset duration downtime; such as 1 hour; then show that now air-conditioning refrigeration system no longer needs running, therefore described choke valve 6 and described first normally closed solenoid valve 7 are all closed.
In the second embodiment of air-conditioning refrigeration system of the present invention as shown in Figure 2, also comprise second normally closed solenoid valve 9 in parallel with described first normally closed solenoid valve 7, said first normally closed solenoid valve 7 and second normally closed solenoid valve 9 in parallel with it use as on-off valve, are jointly regulated the circulation of cold-producing medium by described first normally closed solenoid valve 7 and described second normally closed solenoid valve 9.
In the 3rd embodiment of air-conditioning refrigeration system of the present invention as shown in Figure 3, comprise the capillary 8 of connecting with described first normally closed solenoid valve 7 and/or the second normally closed solenoid valve 9, described capillary 8 can increase the mass flow of the cold-producing medium entering described evaporimeter 11.
Certainly, shown in the 4th embodiment of air-conditioning refrigeration system of the present invention as shown in Figure 4, comprise the capillary 8 of connecting with described first normally closed solenoid valve 7, described capillary 8 can increase the mass flow of the cold-producing medium entering described evaporimeter 11.
In addition, as shown in figures 1-4 in the above embodiment of the present invention, can according to actual conditions, select to arrange evaporimeter centrifugal blower 12, the condensation fan 4 of condenser, reservoir 5 and gas-liquid separator 15 etc.
In addition, the effect of capillary 8 increases the mass flow entering the cold-producing medium of evaporimeter 11, and in one embodiment, the first normally closed solenoid valve 7 comparatively capillary 8 can reduce refrigerant perfused amount closer to reservoir 5.
In addition, this choke valve 6 can be electric expansion valve.
Below, in conjunction with structure of the present invention, control method of the present invention is described:
Detected the temperature of described evaporimeter 11 entrance by described first temperature sensor 10, and detect the temperature of described evaporimeter 11 outlet by described second temperature sensor 13;
After a period of time started shooting by compressor 1, such as, after start 30min, the size of more described inlet temperature and outlet temperature: if the difference of the temperature of described outlet and described entrance is more than or equal to the default temperature difference, such as these temperature difference >=10 DEG C, open the bypass branch at described first normally closed solenoid valve 7 and/or described second normally closed solenoid valve 9 place; As temperature difference < 2 DEG C, close the bypass branch at described first normally closed solenoid valve 7 and/or described second normally closed solenoid valve 9 place.
In addition, in one embodiment, the unlatching of described first normally closed solenoid valve 7 and/or described second normally closed solenoid valve 9 can also be controlled: more described pressure of inspiration(Pi) and preset pressure by the pressure of inspiration(Pi) detecting compressor 1, such as, when described pressure of inspiration(Pi) is less than preset pressure P1, open the bypass branch at described first normally closed solenoid valve 7 and/or described second normally closed solenoid valve 9 place.Here P1 is according to the difference of refrigerant type, and its value is also different.In one embodiment, P1 meets condition below: for the unit using cold-producing medium R22, R407C, P1 is 0.5MPa; For the unit using cold-producing medium R410A, P1 is 0.79MPa; For the unit using refrigerant R134a, P1 is 0.29MPa.
For guaranteeing compressor 1 operational reliability; described air-conditioning refrigeration system also comprises outdoor temperature sensor 2; described outdoor temperature sensor 2 is for detecting outdoor temperature: if temperature sensor≤-15 DEG C, unit outside; compressor shutdown time >=1h; choke valve 6, first normally closed solenoid valve 7 and/or described second normally closed solenoid valve 9 are all fastened; at this moment flow to the transport phenomena of condenser without any cooling agent from evaporimeter, thus improve reliability.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope of request of the present invention protection.
Claims (10)
1. an air-conditioning refrigeration system, comprise the evaporimeter (11), compressor (1), choke valve (6) and the condenser (3) that are communicated with successively, described choke valve (6) is arranged between described evaporimeter (11) and condenser (3), it is characterized in that, also comprise the bypass branch in parallel with described choke valve (6), and can open or close the on-off valve of described bypass branch.
2. air-conditioning refrigeration system as claimed in claim 1, it is characterized in that, also comprise the first temperature sensor (10) and second temperature sensor (13) at the entrance and exit place laying respectively at described evaporimeter (11), described first temperature sensor (10) is for detecting the temperature of described entrance, and described second temperature sensor (13) is for detecting the temperature of described outlet; When the difference of the temperature of described outlet and described entrance is greater than the default temperature difference, described on-off valve is opened.
3. air-conditioning refrigeration system as claimed in claim 1, it is characterized in that, also comprise pressure sensor (14), this pressure sensor (14) is for detecting the pressure of inspiration(Pi) of described compressor (1); When described pressure of inspiration(Pi) is less than preset pressure, described on-off valve is opened.
4. air-conditioning refrigeration system as claimed in claim 1, it is characterized in that, also comprise outdoor temperature sensor (2), described outdoor temperature sensor (2) is for detecting outdoor temperature; The temperature detected when described outdoor temperature sensor (2) is less than preset temperature and described compressor (1) downtime when being greater than preset duration, and described choke valve (6) and described on-off valve are all closed.
5. the air-conditioning refrigeration system as described in as arbitrary in Claims 1 to 4, it is characterized in that, described on-off valve comprises the first normally closed solenoid valve (7).
6. air-conditioning refrigeration system as claimed in claim 5, it is characterized in that, described on-off valve also comprises second normally closed solenoid valve (9) in parallel with described first normally closed solenoid valve (7).
7. air-conditioning refrigeration system as claimed in claim 6, it is characterized in that, described on-off valve comprises the capillary (8) of connecting with described first normally closed solenoid valve (7) and/or the second normally closed solenoid valve (9), and described capillary (8) can increase the mass flow of the cold-producing medium entering described evaporimeter (11).
8. the control method of the air-conditioning refrigeration system as described in one of claim 2 ~ 7, it is characterized in that, described air-conditioning refrigeration system comprises the first temperature sensor (10) and second temperature sensor (13) at the entrance and exit place laying respectively at described evaporimeter (11), described first temperature sensor (10) is for detecting the temperature of described entrance, and described second temperature sensor (13) is for detecting the temperature of described outlet;
Detected the temperature of described evaporimeter (11) entrance by described first temperature sensor (10), and detect by described second temperature sensor (13) temperature that described evaporimeter (11) exports;
The size of more described inlet temperature and outlet temperature, if the difference of the temperature of described outlet and described entrance is more than or equal to the default temperature difference, opens described on-off valve, opens the bypass branch at described on-off valve place.
9. control method as claimed in claim 8, it is characterized in that, described air-conditioning refrigeration system also comprises pressure sensor (14), and this pressure sensor (14) is for detecting the pressure of inspiration(Pi) of described compressor (1);
The pressure of inspiration(Pi) of described compressor (1) is detected by described pressure sensor (14), more described pressure of inspiration(Pi) and preset pressure, if described pressure of inspiration(Pi) is less than preset pressure, then open described on-off valve, open the bypass branch at described on-off valve place.
10. control method as claimed in claim 9, it is characterized in that, described air-conditioning refrigeration system also comprises outdoor temperature sensor (2), and described outdoor temperature sensor (2) is for detecting outdoor temperature;
Detect outdoor temperature by described outdoor temperature sensor (2), compare detected outdoor temperature and preset temperature, and calculate the downtime of described compressor (1) when described compressor (1) is shut down; When detected outdoor temperature is less than preset temperature, and described compressor (1) downtime calculated is when being greater than preset duration, and described choke valve (6) and described on-off valve are all closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410811385.XA CN104457048A (en) | 2014-12-22 | 2014-12-22 | Air conditioning refrigeration system and control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410811385.XA CN104457048A (en) | 2014-12-22 | 2014-12-22 | Air conditioning refrigeration system and control method |
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| CN104457048A true CN104457048A (en) | 2015-03-25 |
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| CN201410811385.XA Pending CN104457048A (en) | 2014-12-22 | 2014-12-22 | Air conditioning refrigeration system and control method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792049A (en) * | 2015-04-27 | 2015-07-22 | 南方风机股份有限公司 | Switch-type refrigerating system used for adjusting refrigerating capacity |
| CN106440251A (en) * | 2016-11-04 | 2017-02-22 | 珠海格力电器股份有限公司 | Variable-frequency air conditioning system with large refrigeration capacity, air conditioner and control method for throttling device of variable-frequency air conditioning system |
| CN106679110A (en) * | 2017-01-19 | 2017-05-17 | 美的集团股份有限公司 | Air conditioning system |
| CN107449078A (en) * | 2017-07-26 | 2017-12-08 | 美的集团武汉制冷设备有限公司 | Air-conditioning system, the control device of air-conditioning system and method |
| CN112432340A (en) * | 2020-11-26 | 2021-03-02 | 珠海格力电器股份有限公司 | Control method and control device of air conditioner, processor and air conditioning system |
| US10941955B2 (en) | 2017-10-27 | 2021-03-09 | Dometic Sweden Ab | Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle |
| CN113757958A (en) * | 2020-06-04 | 2021-12-07 | 维谛技术有限公司 | Control method and device of air conditioning system |
| US11254183B2 (en) | 2017-08-25 | 2022-02-22 | Dometic Sweden Ab | Recreational vehicle, cooling device, controlling system and method for controlling the cooling device |
| CN115143655A (en) * | 2022-06-20 | 2022-10-04 | 青岛海信日立空调系统有限公司 | Evaporation condensation magnetic suspension refrigerating unit |
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2014
- 2014-12-22 CN CN201410811385.XA patent/CN104457048A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792049A (en) * | 2015-04-27 | 2015-07-22 | 南方风机股份有限公司 | Switch-type refrigerating system used for adjusting refrigerating capacity |
| CN106440251A (en) * | 2016-11-04 | 2017-02-22 | 珠海格力电器股份有限公司 | Variable-frequency air conditioning system with large refrigeration capacity, air conditioner and control method for throttling device of variable-frequency air conditioning system |
| CN106679110A (en) * | 2017-01-19 | 2017-05-17 | 美的集团股份有限公司 | Air conditioning system |
| CN106679110B (en) * | 2017-01-19 | 2019-04-19 | 美的集团股份有限公司 | Air-conditioning system |
| CN107449078A (en) * | 2017-07-26 | 2017-12-08 | 美的集团武汉制冷设备有限公司 | Air-conditioning system, the control device of air-conditioning system and method |
| US11254183B2 (en) | 2017-08-25 | 2022-02-22 | Dometic Sweden Ab | Recreational vehicle, cooling device, controlling system and method for controlling the cooling device |
| US11919363B2 (en) | 2017-08-25 | 2024-03-05 | Dometic Sweden Ab | Recreational vehicle, cooling device, controlling system and method for controlling the cooling device |
| US10941955B2 (en) | 2017-10-27 | 2021-03-09 | Dometic Sweden Ab | Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle |
| CN113757958A (en) * | 2020-06-04 | 2021-12-07 | 维谛技术有限公司 | Control method and device of air conditioning system |
| CN113757958B (en) * | 2020-06-04 | 2022-12-27 | 维谛技术有限公司 | Control method and device of air conditioning system |
| CN112432340B (en) * | 2020-11-26 | 2021-11-26 | 珠海格力电器股份有限公司 | Control method and control device of air conditioner, processor and air conditioning system |
| CN112432340A (en) * | 2020-11-26 | 2021-03-02 | 珠海格力电器股份有限公司 | Control method and control device of air conditioner, processor and air conditioning system |
| CN115143655A (en) * | 2022-06-20 | 2022-10-04 | 青岛海信日立空调系统有限公司 | Evaporation condensation magnetic suspension refrigerating unit |
| CN115143655B (en) * | 2022-06-20 | 2023-05-23 | 青岛海信日立空调系统有限公司 | Evaporation condensation magnetic suspension refrigerating unit |
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Application publication date: 20150325 |
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