阅读说明：本技术 一种空调系统及控制方法 (Air conditioning system and control method ) 是由 方大伟 于 2021-08-02 设计创作，主要内容包括：一种空调系统,包括制冷压缩机、气液分离器、第一冷凝器、干燥过滤器、视液镜、中间换热器、储液器、氟泵、蒸发器以及第二冷凝器；一种空调系统的控制方法,包括开机、室内风机开启、检测室外环境温度以及检测室内回风温度,本发明为突破风冷机房空调能效瓶颈,需要减少压缩机运行时间,最大程度的利用自然冷源。在春秋、冬季,减少或者完全停止压缩机工作,利用室外冷源对发热电子设备进行降温冷却,从而提高空调能效,降低数据中心能耗。(An air conditioning system comprises a refrigeration compressor, a gas-liquid separator, a first condenser, a drying filter, a liquid viewing mirror, an intermediate heat exchanger, a liquid storage device, a fluorine pump, an evaporator and a second condenser; the invention relates to a control method of an air conditioning system, which comprises the steps of starting up, starting an indoor fan, detecting the outdoor environment temperature and detecting the indoor return air temperature. In spring, autumn and winter, the compressor is reduced or completely stopped, and the outdoor cold source is used for cooling the heat-generating electronic equipment, so that the energy efficiency of the air conditioner is improved, and the energy consumption of the data center is reduced.)

1. An air conditioning system, comprising:

a refrigeration compressor (100);

the outlet of the gas-liquid separator (101) is connected with the inlet of the refrigeration compressor (100);

a first condenser (102), an inlet of the first condenser (102) being connected to an outlet of a refrigeration compressor (100);

a dry filter (103), wherein the inlet of the dry filter (103) is connected with the outlet of the first condenser (102);

the outlet of the dry filter (103) is connected with the inlet of the liquid sight glass (104);

the outlet of the liquid observation mirror (104) is connected with the inlet of the intermediate heat exchanger (106), and the outlet of the intermediate heat exchanger (106) is connected with the inlet of the gas-liquid separator (101);

the inlet of the liquid storage device (204) is connected with the electric three-way regulating valve (202), the inlet of the liquid storage device (204) is provided with a one-way valve (203), and the electric three-way regulating valve (202) is connected with the other outlet of the intermediate heat exchanger (106);

a fluorine pump (205), an inlet of the fluorine pump (205) being connected to an outlet of the reservoir (204);

an inlet of the evaporator (209) is connected with an outlet of the fluorine pump (205), a first stop valve (206) is arranged on the outlet of the fluorine pump (205), a second electronic expansion valve (207) is arranged on the inlet of the evaporator (209), an outlet of the evaporator (209) is connected with the other inlet of the intermediate heat exchanger (106), and a second stop valve (210) is arranged on the outlet of the evaporator (209); and

second condenser (200), second condenser (200) and first condenser (102) integrated setting, the export and the electronic three way control valve (202) of second condenser (200) are connected, and are provided with the three-way valve on another import of middle heat exchanger (106), the import and the three-way valve of second condenser (200) are connected.

2. An air conditioning system according to claim 1, further comprising an evaporator fan (208), said evaporator fan (208) being arranged on the evaporator (209).

3. An air conditioning system according to claim 1, further comprising a condensing fan (201), said condensing fan (201) being arranged on the first condenser (102).

4. A control method of an air conditioning system is characterized by comprising the following steps:

s1, starting up;

s2, starting an indoor fan;

s3, detecting the outdoor environment temperature (out of Tmax);

s31, when the outdoor environment temperature is higher than 20 ℃, the fluorine pump (205) and the compressor are started, and the step S2 is returned;

s32, when the outdoor environment temperature is less than 20 ℃;

s32-1, when the outdoor environment temperature is more than 5 ℃ and less than 20 ℃, starting the fluorine pump (205) and the compressor, and returning to the step S2;

s32-2, when the outdoor environment temperature is less than 5 ℃, the fluorine pump (205) is started, and the step S2 is returned;

s4, detecting the indoor return air temperature (within T);

s4-1, when the indoor return air temperature is not more than 24 ℃ plus delta td, the unit keeps a ventilation state, and the compressor stops;

s4-2, when the indoor return air temperature is higher than 24 ℃ + delta td, returning to the step S3.

5. The control method of an air conditioning system according to claim 4, further comprising the steps of:

s1, starting up;

s2, detecting whether the compressor is running;

s2-1, detecting whether the fluorine pump (205) is operated or not when the compressor is not operated;

s2-1-1, operating the fluorine pump (205) and operating the condensing fan (201) at full speed;

s2-1-2, the fluorine pump (205) is not operated, and the step returns to S2;

s2-2, the compressor is operated, and the step S3 is entered;

s3, detecting the condensing pressure (P);

s3-1, when the condensing pressure is not more than P1-a Δ P, the condenser fan operates at the lowest speed, and the step S2 is returned;

s3-2, when the condensing pressure is greater than P1-a Δ P and greater than P1+ a Δ P, the condensing fan (201) operates at full speed, and the step S2 is returned to;

and S3-3, when the condensation pressure is greater than P1-a Δ P and less than P1+ a Δ P, the condensation fan (201) operates in a linear speed regulation mode, and the step S2 is returned.

6. The control method of an air conditioning system according to claim 4, characterized by comprising the steps of:

s1, starting up;

s2, starting an indoor fan;

s3, detecting the outdoor environment temperature (out of Tmax);

s31, when the outdoor environment temperature is higher than 20 ℃, the C-B section of the electric three-way regulating valve (202) is conducted, the A-B section is closed, and the step S2 is returned;

s32, when the outdoor environment temperature is less than 20 ℃;

s32-1, when the outdoor environment temperature is more than 5 ℃ and less than 20 ℃, the three-way regulating valve keeps the standby or ventilation state according to the opening degree air conditioner of the return air temperature PID control valve, and the step S2 is returned;

s32-2, when the outdoor environment temperature is less than 5 ℃, the electric three-way regulating valve (202) A-B is conducted, C-B is closed, and the step S2 is returned;

s4, detecting the indoor return air temperature (within T);

s4-1, when the indoor return air temperature is not more than 24 ℃ plus delta td, the unit keeps a ventilation state, and the compressor stops;

s4-2, when the indoor return air temperature is higher than 24 ℃ + delta td, returning to the step S3.

Technical Field

The invention relates to the field of air conditioning equipment, in particular to an air conditioning system and a control method.

Background

With the acceleration of the digital economic process of China and the commercial use of the 5G technology, the data center is developed vigorously. The data center includes a large number of electronic information devices such as a memory, an exchange, and a server, and an air conditioner is required to cool the above devices that generate heat. At present, a data machine room mainly adopts an air-cooled special machine room air conditioner, a compressor needs to be started all the year round for refrigeration and cooling, and the energy consumption of the air conditioner is high. In order to reduce the energy consumption of the air conditioner, a machine room air conditioner with high energy efficiency ratio is needed. The electric elements in the machine room air conditioner are mainly electrical parts such as a compressor, a fan and the like, the energy efficiency of the air conditioner can be improved by adopting the efficient and energy-saving compressor, the fan and the system to optimize and match, but an energy efficiency bottleneck exists.

Disclosure of Invention

In view of the above, the present invention is directed to an air conditioning system and a control method thereof to solve the problems in the prior art.

Based on the above purpose, the invention provides an air conditioning system, which comprises a refrigeration compressor, a gas-liquid separator, a first condenser, a dry filter, a liquid viewing mirror, an intermediate heat exchanger, a liquid storage device, a fluorine pump, an evaporator and a second condenser, wherein an outlet of the gas-liquid separator is connected with an inlet of the refrigeration compressor, an inlet of the first condenser is connected with an outlet of the refrigeration compressor, an inlet of the dry filter is connected with an outlet of the first condenser, an outlet of the dry filter is connected with an inlet of the liquid viewing mirror, an outlet of the liquid viewing mirror is connected with an inlet of the intermediate heat exchanger, an outlet of the intermediate heat exchanger is connected with an inlet of the gas-liquid separator, an inlet of the liquid storage device is connected with an electric three-way regulating valve, the inlet of the liquid storage device is provided with a one-way valve, and the electric three-way regulating valve is connected with the other outlet of the intermediate heat exchanger, the utility model discloses a fluorine heat exchanger, including the inlet of fluorine pump and the exit linkage of reservoir, the import of evaporimeter and the exit linkage of fluorine pump, and be provided with first stop valve in the export of fluorine pump, be provided with second electronic expansion valve in the import of evaporimeter, the export of evaporimeter and another access connection of middle heat exchanger, be provided with the second stop valve in the export of evaporimeter, the second condenser is integrated to be set up with first condenser, the export of second condenser is connected with electronic three way control valve, and is provided with the three-way valve in another import of middle heat exchanger, the import and the three-way valve of second condenser are connected.

Preferably, the evaporator further comprises an evaporation fan, and the evaporation fan is arranged on the evaporator.

Preferably, the condenser further comprises a condensing fan, and the condensing fan is arranged on the first condenser.

A control method of an air conditioning system includes the following steps:

s1, starting up;

s2, starting an indoor fan;

s3, detecting the outdoor environment temperature (out of Tmax);

s31, when the outdoor environment temperature is higher than 20 ℃, the fluorine pump and the compressor are started, and the step S2 is returned;

s32, when the outdoor environment temperature is less than 20 ℃;

s32-1, when the outdoor environment temperature is more than 5 ℃ and less than 20 ℃, starting the fluorine pump and the compressor, and returning to the step S2;

s32-2, when the outdoor environment temperature is less than 5 ℃, starting the fluorine pump, and returning to the step S2;

s4, detecting the indoor return air temperature (within T);

s4-1, when the indoor return air temperature is not more than 24 ℃ plus delta td, the unit keeps a ventilation state, and the compressor stops;

s4-2, when the indoor return air temperature is higher than 24 ℃ + delta td, returning to the step S3.

More preferably, the method further comprises the following steps:

s1, starting up;

s2, detecting whether the compressor is running;

s2-1, detecting whether the fluorine pump operates or not when the compressor does not operate;

s2-1-1, operating a fluorine pump and operating a condensing fan at full speed;

s2-1-2, the fluorine pump does not run, and the step S2 is returned;

s2-2, the compressor is operated, and the step S3 is entered;

s3, detecting the condensing pressure (P);

s3-1, when the condensing pressure is not more than P1-a Δ P, the condenser fan operates at the lowest speed, and the step S2 is returned;

s3-2, when the condensing pressure is more than P1-a Δ P and more than P1+ a Δ P, the condensing fan operates at full speed and returns to the step S2;

and S3-3, when the condensation pressure is greater than P1-a Δ P and less than P1+ a Δ P, the condensation fan operates in a linear speed regulation mode, and the step S2 is returned.

More preferably, the method comprises the following steps:

s1, starting up;

s2, starting an indoor fan;

s3, detecting the outdoor environment temperature (out of Tmax);

s31, when the outdoor environment temperature is higher than 20 ℃, the C-B section of the electric three-way regulating valve is conducted, the A-B section is closed, and the step S2 is returned;

s32, when the outdoor environment temperature is less than 20 ℃;

s3-2-1, when the outdoor environment temperature is more than 5 ℃ and less than 20 ℃, the three-way regulating valve keeps the standby or ventilation state according to the opening degree air conditioner of the return air temperature PID control valve, and the step S2 is returned;

s3-2-2, when the outdoor environment temperature is less than 5 ℃, the electric three-way regulating valve A-B is conducted, the C-B is closed, and the step S2 is returned;

s4, detecting the indoor return air temperature (within T);

s4-1, when the indoor return air temperature is not more than 24 ℃ plus delta td, the unit keeps a ventilation state, and the compressor stops;

s4-2, when the indoor return air temperature is higher than 24 ℃ + delta td, returning to the step S3.

From the above, it can be seen that the beneficial effects of the present invention are: the invention aims to break through the energy efficiency bottleneck of the air conditioner of the air cooling machine room, reduce the running time of the compressor and utilize a natural cold source to the maximum extent. In spring, autumn and winter, the work of the compressor is reduced or completely stopped, and the heating electronic equipment is cooled by utilizing an outdoor cold source (cold air), so that the energy efficiency of the air conditioner is improved, and the energy consumption of the data center is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a circuit diagram of the present invention;

FIG. 2 is a schematic diagram of the overall control logic flow of the present invention;

FIG. 3 is a schematic flow chart of the control logic of the condensing fan according to the present invention;

FIG. 4 is a schematic flow chart of the control logic of the three-way regulator valve of the present invention.

In the reference symbols: 100. a refrigeration compressor; 101. a gas-liquid separator; 102. a first condenser; 103. drying the filter; 104. a liquid viewing mirror; 105. a first electronic expansion valve; 106. an intermediate heat exchanger; 200. a second condenser; 201. a condensing fan; 202. an electric three-way regulating valve; 203. a one-way valve; 204. a reservoir; 205. a fluorine pump; 206. a first shut-off valve; 207. a second electronic expansion valve; 208. an evaporation fan; 209. evaporator 210, second shutoff valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.

It is to be noted that technical terms or scientific terms used in the embodiments of the present invention should have the ordinary meanings as understood by those having ordinary skill in the art to which the present disclosure belongs, unless otherwise defined. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Examples

Referring to fig. 1-4, an air conditioning system includes a refrigeration compressor 100, a gas-liquid separator 101, a first condenser 102, a dry filter 103, a sight glass 104, an intermediate heat exchanger 106, a liquid reservoir 204, a fluorine pump 205, an evaporator 209, and a second condenser 200, an outlet of the gas-liquid separator 101 is connected to an inlet of the refrigeration compressor 100, an inlet of the first condenser 102 is connected to an outlet of the refrigeration compressor 100, an inlet of the dry filter 103 is connected to an outlet of the first condenser 102, an outlet of the dry filter 103 is connected to an inlet of the sight glass 104, an outlet of the sight glass 104 is connected to an inlet of the intermediate heat exchanger 106, an outlet of the intermediate heat exchanger 106 is connected to an inlet of the gas-liquid separator 101, an inlet of the liquid reservoir 204 is connected to an electric three-way regulating valve 202, and an inlet of the liquid reservoir 204 is provided with a one-way valve 203, and the electric three-way regulating valve 202 is connected with another outlet of the intermediate heat exchanger 106, the inlet of the fluorine pump 205 is connected with the outlet of the liquid reservoir 204, the inlet of the evaporator 209 is connected with the outlet of the fluorine pump 205, the outlet of the fluorine pump 205 is provided with a first stop valve 206, the inlet of the evaporator 209 is provided with a second electronic expansion valve 207, the outlet of the evaporator 209 is connected with another inlet of the intermediate heat exchanger 106, the outlet of the evaporator 209 is provided with a second stop valve 210, the second condenser 200 is integrated with the first condenser 102, the outlet of the second condenser 200 is connected with the electric three-way regulating valve 202, a three-way valve is arranged at another inlet of the intermediate heat exchanger 106, and the inlet of the second condenser 200 is connected with the three-way valve.

As a modification of the above scheme, the system further comprises an evaporation fan 208, and the evaporation fan 208 is arranged on the evaporator 209.

As a modified solution of the above solution, the condenser further includes a condensing fan 201, and the condensing fan 201 is disposed on the first condenser 102.

A control method of an air conditioning system includes the following steps:

s1, starting up;

s2, starting an indoor fan;

s3, detecting the outdoor environment temperature T outside;

s3-1, when the outdoor environment temperature is more than 20 ℃, starting the fluorine pump 205 and the compressor, and returning to the step S2;

s3-2, when the outdoor environment temperature is less than 20 ℃;

s3-2-1, when the outdoor environment temperature is more than 5 ℃ and less than 20 ℃, starting the fluorine pump 205 and the compressor, and returning to the step S2;

s3-2-2, when the outdoor environment temperature is less than 5 ℃, turning on the fluorine pump 205, and returning to the step S2;

s4, detecting the indoor return air temperature T;

s4-1, when the indoor return air temperature is not more than 24 ℃ plus delta td, the unit keeps a ventilation state, and the compressor stops;

s4-2, when the indoor return air temperature is higher than 24 ℃ + delta td, returning to the step S3.

As an improvement of the scheme, the method further comprises the following steps:

s1, starting up;

s2, detecting whether the compressor is running;

s2-1, detecting whether the fluorine pump 205 is operated or not when the compressor is not operated;

s2-1-1, operating the fluorine pump 205 and operating the condensing fan 201 at full speed;

s2-1-2, the fluorine pump 205 is not operated, and the step S2 is returned;

s2-2, the compressor is operated, and the step S3 is entered;

s3, detecting the condensing pressure P;

s3-1, when the condensing pressure is not more than P1-a Δ P, the condenser fan operates at the lowest speed, and the step S2 is returned;

s3-2, when the condensing pressure is greater than P1-a Δ P and greater than P1+ a Δ P, the condensing fan 201 runs at full speed, and the step S2 is returned to;

and S3-3, when the condensation pressure is greater than P1-a Δ P and less than P1+ a Δ P, the condensation fan 201 operates at a linear speed regulation mode, and the step returns to the step S2.

As a modified scheme of the scheme, the method comprises the following steps:

s1, starting up;

s2, starting an indoor fan;

s3, detecting the outdoor environment temperature T outside;

s3-1, when the outdoor environment temperature is more than 20 ℃, the electric three-way regulating valve 202C-B section is conducted, the A-B section is closed, and the step S2 is returned;

s3-2, when the outdoor environment temperature is less than 20 ℃;

s3-2-1, when the outdoor environment temperature is more than 5 ℃ and less than 20 ℃, the three-way regulating valve keeps the standby or ventilation state according to the opening degree air conditioner of the return air temperature PID control valve, and the step S2 is returned;

s3-2-2, when the outdoor environment temperature is less than 5 ℃, the electric three-way regulating valve 202A-B is conducted, C-B is closed, and the step S2 is returned;

s4, detecting the indoor return air temperature T;

s4-1, when the indoor return air temperature is not more than 24 ℃ plus delta td, the unit keeps a ventilation state, and the compressor stops;

s4-2, when the indoor return air temperature is more than 24 ℃ +. DELTA td, returning to the step S3

Mode one workflow: the refrigeration compressor 100, the first electronic expansion valve 105, the condensing fan 201, the electric three-way regulating valve 202C-B section, the fluorine pump 205, the first stop valve 206, the second electronic expansion valve 207, the evaporation fan 208 and the second stop valve 210 are opened, and the electric three-way regulating valve 202A-B section is closed.

In a high-temperature environment in summer, the refrigeration compressor 100 needs to be started for refrigeration and cooling. The refrigeration compressor 100 is started to operate, low-pressure low-temperature gas refrigerant sucked from the gas-liquid separator 101 is compressed by the compressor to be changed into high-temperature high-pressure refrigerant gas, then the high-temperature high-pressure refrigerant gas enters the first condenser 102 to be cooled and changed into high-pressure medium-temperature refrigerant liquid, the high-pressure medium-temperature refrigerant liquid flows through the drying filter 103 and the liquid sight glass 104 and then enters the first electronic expansion valve 105 to be throttled and decompressed to be changed into low-pressure low-temperature refrigerant liquid, the low-temperature low-pressure refrigerant liquid enters the intermediate heat exchanger 106 to be evaporated and absorbed to be changed into low-temperature low-pressure refrigerant gas, the low-temperature low-pressure refrigerant gas enters the gas-liquid separator 101 to be subjected to gas-liquid separation, and the low-temperature low-pressure refrigerant gas enters the refrigeration compressor 100 to be compressed, and primary circulation of the first loop is completed.

At the indoor cold end, the fluorine pump 205 conveys the low-temperature low-pressure refrigerant liquid in the liquid storage device 204 to the evaporator 209 through the first stop valve 206 and the second electronic expansion valve 207 to be evaporated and absorbed, so that the low-temperature low-pressure refrigerant liquid is changed into medium-temperature low-pressure refrigerant gas, then the medium-temperature low-pressure refrigerant gas flows through the second stop valve 210, enters the intermediate heat exchanger 106 to be cooled and changed into low-temperature low-pressure refrigerant liquid, the low-temperature low-pressure refrigerant liquid flows in from the C end and flows out from the B end of the electric three-way regulating valve 202, and then the low-temperature low-pressure refrigerant liquid enters the liquid storage device 204 through the one-way valve 203 to be stored, so that the primary circulation of the second loop is completed.

Mode two workflow: the condensing fan 201, the sections of the electric three-way regulating valves 202A-B, the fluorine pump 205, the first stop valve 206, the second stop valve 210, the evaporation fan 208 and the second stop valve 210 are opened, and the refrigeration compressor 100, the first electronic expansion valve 105 and the sections of the electric three-way regulating valves 202C-B are closed.

Under the working condition of low ambient temperature in winter, the refrigeration compressor 100 is turned off, and the cooling requirement of indoor IT equipment is met by utilizing the cold energy of low-temperature air in the outdoor environment. At the indoor cold end, the fluorine pump 205 conveys the low-temperature low-pressure refrigerant liquid in the liquid storage device 204 to the evaporator 209 through the first stop valve 206 and the second electronic expansion valve 207 to evaporate and absorb heat to become medium-temperature low-pressure refrigerant gas, the medium-temperature low-pressure refrigerant gas flows through the second stop valve 210 and the three-way valve P to enter the second condenser 200 to be cooled to become low-temperature low-pressure refrigerant liquid, the low-temperature low-pressure refrigerant liquid flows in from the end a of the electric three-way regulating valve 202, flows out from the end B, finally enters the liquid storage device 204 to be stored, then enters the first evaporator 209 to evaporate and absorb heat, and the primary circulation of the third loop is completed.

Mode three work flow: the refrigeration compressor 100, the first electronic expansion valve 105, the condensing fan 201, the electric three-way regulating valves 202A-B and C-B, the fluorine pump 205, the first stop valve 206, the second electronic expansion valve 207, the evaporation fan 208 and the second stop valve 210 are started.

And the mode I and the mode II work modes are simultaneously started to complete all the circulation of the first loop, the second loop and the third loop.

In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the present invention. The foregoing description is only a preferred embodiment of the invention, which can be embodied in many different forms than described herein, and therefore the invention is not limited to the specific embodiments disclosed above. And that those skilled in the art may, using the methods and techniques disclosed above, make numerous possible variations and modifications to the disclosed embodiments, or modify equivalents thereof, without departing from the scope of the claimed embodiments. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.