CN107166582B - Air conditioning cooling water system, air-conditioning system and air conditioning cooling water system control method - Google Patents

Air conditioning cooling water system, air-conditioning system and air conditioning cooling water system control method Download PDF

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Publication number
CN107166582B
CN107166582B CN201710330640.2A CN201710330640A CN107166582B CN 107166582 B CN107166582 B CN 107166582B CN 201710330640 A CN201710330640 A CN 201710330640A CN 107166582 B CN107166582 B CN 107166582B
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CN
China
Prior art keywords
water
cooling
cooling water
temperature
heat exchanger
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CN201710330640.2A
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Chinese (zh)
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CN107166582A (en
Inventor
王升
刘国林
姜春苗
王娟
刘羽松
孙栋军
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珠海格力电器股份有限公司
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Priority to CN201710330640.2A priority Critical patent/CN107166582B/en
Publication of CN107166582A publication Critical patent/CN107166582A/en
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Publication of CN107166582B publication Critical patent/CN107166582B/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0003Exclusively-fluid systems
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30Arrangement or mounting of heat-exchangers
    • F25B41/31
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHER SUBCLASS
    • F25D17/00Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/02Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine

Abstract

A kind of air conditioning cooling water system provided by the invention, including cooling tower, cooling water outlet pipe and cooling water return pipe, the cooling water outlet pipe, the cooling water return pipe are connected to the cooling tower respectively, for being exchanged heat using the cooling water in cooling tower with condenser, it is characterized in that, further including supplementary heat exchanger and auxiliary switch;The supplementary heat exchanger is for cooling down the air inlet of the cooling tower;The auxiliary switch is used to control the working condition of the supplementary heat exchanger.Above-mentioned air conditioning cooling water system is equipped with supplementary heat exchanger, is cooled down using air inlet of the supplementary heat exchanger to cooling tower, and then reduces the cooling water leaving water temperature of cooling tower.When outdoor wet-bulb temperature is lower, the reduction synchronous with outdoor wet-bulb temperature of the cooling water leaving water temperature of cooling tower can be made or be further reduced to outdoor wet-bulb temperature hereinafter, improving the efficiency of air conditioning cooling water system, avoid the waste of the energy.

Description

Air conditioning cooling water system, air-conditioning system and air conditioning cooling water system control method

Technical field

The present invention designs technical field of refrigeration equipment, more particularly to a kind of air conditioning cooling water system, air-conditioning system and sky Adjust cooling water system control method.

Background technique

Traditional air conditioning cooling water system is generally existing following insufficient: when outdoor wet-bulb temperature is lower, cooling tower due to The factors such as type selecting, control, cooling water leaving water temperature synchronous with wet-bulb temperature cannot reduce, traditional high-efficiency frequency conversion cooling water system When cooling inflow temperature is lower, efficiency will appear to be substantially improved system, if but cooling tower leaving water temperature cannot be with wet-bulb temperature It is synchronous to reduce, then cause frequency conversion cooling water system biggish energy waste occur.

Summary of the invention

Based on this, it is necessary to energy waste caused by synchronous with wet-bulb temperature cannot being reduced for cooling water leaving water temperature Problem provides a kind of air conditioning cooling water system, air-conditioning system and air conditioning cooling water system control method.

A kind of air conditioning cooling water system provided by the invention, including cooling tower, cooling water outlet pipe and cooling water return water Pipe, the cooling water outlet pipe, the cooling water return pipe are connected to the cooling tower respectively, cold in cooling tower for utilizing But water and condenser exchange heat, wherein further include supplementary heat exchanger and auxiliary switch;

The supplementary heat exchanger is for cooling down the air inlet of the cooling tower;

The auxiliary switch is used to control the working condition of the supplementary heat exchanger.

In one of them embodiment, the cooling water system further includes chilled water branch water inlet pipe and chilled water branch Road outlet pipe;

The both ends of the chilled water branch water inlet pipe are connected to respectively with the chilled water water outlet of evaporator and the auxiliary The water inlet of heat exchanger is connected to, the chilled water branch outlet pipe respectively with the chilled water water return outlet of evaporator and the auxiliary The water outlet of heat exchanger is connected to.

In one of them embodiment, the auxiliary switch is arranged in the chilled water branch water inlet pipe or chilled water branch On the outlet pipe of road.

In one of them embodiment, the cooling water system includes cooling water leaving water temperature sensors, the cooling Water leaving water temperature sensors are used to measure the cooling water leaving water temperature of the cooling tower.

The present invention also provides a kind of air-conditioning system, wherein the air-conditioning system includes condenser, evaporator, refrigerator pipes Road, cooling tower, cooling water outlet pipe, cooling water return pipe, supplementary heat exchanger and auxiliary switch;

The condenser connects and composes refrigerant circuit by the refrigeration pipeline with the evaporator, and the refrigerant returns Compressor and throttling set are equipped in road;

The cooling water outlet pipe, the cooling water return pipe are connected to the cooling tower respectively, for utilizing cooling tower In cooling water and the condenser exchange heat;

The supplementary heat exchanger is for cooling down the air inlet of the cooling tower;

The auxiliary switch is used to control the working condition of the supplementary heat exchanger.

In one of them embodiment, the air-conditioning system further includes chilled water branch water inlet pipe and chilled water branch Outlet pipe;

The both ends of the chilled water branch water inlet pipe are connected to the chilled water water outlet of the evaporator and described respectively The water inlet of supplementary heat exchanger is connected to, the chilled water branch outlet pipe respectively with the chilled water water return outlet of the evaporator and The water outlet of the supplementary heat exchanger is connected to.

In one of them embodiment, the air-conditioning system includes cooling water leaving water temperature sensors and wet-bulb temperature Sensor;

The cooling water leaving water temperature sensors are used to measure the cooling water leaving water temperature of the cooling tower;

The wet bulb temperature sensor is used to measure the outdoor wet-bulb temperature of air-conditioning system.

The present invention also provides a kind of control methods of air conditioning cooling water system as described above, which is characterized in that described Control method includes the following steps:

Than the height of wet-bulb temperature than outdoor and the first preset temperature;

When the outdoor wet-bulb temperature, which is lower than, is equal to first preset temperature, controls the auxiliary switch and open or increase Big aperture.

In one of them embodiment, the control method further includes following steps:

Than the height of wet-bulb temperature than outdoor and the second preset temperature;

When the outdoor wet-bulb temperature is optionally greater than second preset temperature, controls the auxiliary switch and open or increase Big aperture;

Wherein, first preset temperature is lower than second preset temperature.

In one of them embodiment, the control method further includes following steps:

When the outdoor wet-bulb temperature is higher than first preset temperature and is lower than second preset temperature, institute is controlled It states auxiliary switch and closes or reduce aperture.

In one of them embodiment, first preset temperature is 3~10 DEG C lower than second preset temperature.

Above-mentioned air conditioning cooling water system is equipped with supplementary heat exchanger, is carried out using air inlet of the supplementary heat exchanger to cooling tower cold But cool down, and then reduce the cooling water leaving water temperature of cooling tower.When outdoor wet-bulb temperature is lower, the cooling of cooling tower can be made The reduction synchronous with outdoor wet-bulb temperature of water leaving water temperature is further reduced to outdoor wet-bulb temperature hereinafter, improving air conditioning cooling water The efficiency of system avoids the waste of the energy.

Further, when outdoor wet-bulb temperature is higher, the cooling water of cooling tower can be made to be discharged using supplementary heat exchanger Temperature reduces, and avoids since cooling water leaving water temperature is excessively high, high voltage protective or surge phenomenon occurs in cooling water system.

Detailed description of the invention

In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only one recorded in the present invention A little embodiments are also possible to obtain other drawings based on these drawings for those of ordinary skill in the art.

Fig. 1 is air conditioning cooling water system structural schematic diagram;

Wherein,

110- chilled water branch water inlet pipe;120- chilled water branch outlet pipe;130- supplementary heat exchanger;140- auxiliary is opened It closes;

200- cooling tower;210- cooling water outlet pipe;220- cooling water return pipe;230- cooling pump;240- cooling water valve Door;

300- condenser;310- compressor;320- orifice union;

400- evaporator;410- chilled water outlet pipe;420- chilled water return pipe;430- refrigerating water pump;440- freezes water valve Door;450- regulating valve.

Specific embodiment

In order to make the objectives, technical solutions, and advantages of the present invention clearer, by the following examples, it and combines attached Figure carries out further specifically air conditioning cooling water system of the invention, air-conditioning system and air conditioning cooling water system control method It is bright.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not intended to limit the present invention.

Refering to Figure 1, the air conditioning cooling water system of one embodiment of the invention includes cooling tower 200, cooling water water outlet Pipe 210, cooling water return pipe 220, supplementary heat exchanger 130 and auxiliary switch 140, arrow indicates 200 side of air inlet of cooling tower in figure To and air-out direction.

One end of cooling water outlet pipe 210 is connected to the cooling water outlet of cooling tower 200, the other end and air-conditioning system Condenser 300 connects.One end of cooling water return pipe 220 is connected to the cooling water water return outlet of cooling tower 200, the other end and air-conditioning The condenser 300 of system connects.The cooling water that cooling water outlet pipe 210 and cooling water return pipe 220 are prepared using cooling tower 200 With the refrigerant heat exchanger in condenser.

Cooling tower 200 forms cooling water by cooling water outlet pipe 210 and cooling water return pipe 220 and condenser 300 Circuit, optionally, chilled(cooling) water return (CWR) are equipped with cooling pump 230 and cooling water valve 240.Cooling pump 230 is for existing to cooling water Circulation provides power in chilled(cooling) water return (CWR).Cooling water valve 240 is used to control the flow of cooling water in chilled(cooling) water return (CWR).Further Ground, cooling pump 230 can make to be arranged on cooling water outlet pipe 210.Further, cooling water valve 240 is two, is respectively set On the cooling water outlet pipe 210 and cooling water return pipe 220 being connected with 200 water outlet of cooling tower and water inlet.It is optional Ground, cooling water valve 240 can be solenoid valve.

For cooling down to the air inlet of cooling tower 200, i.e. the air inlet of cooling tower 200 first passes around supplementary heat exchanger 130 Supplementary heat exchanger 130 is cooling, enters back into cooling tower 200 and cools down to the water in cooling tower 200.Utilize supplementary heat exchanger pair The air inlet of cooling tower cools down, and then reduces the cooling water leaving water temperature of cooling tower.When outdoor wet-bulb temperature is lower, It can make the reduction synchronous with outdoor wet-bulb temperature of the cooling water leaving water temperature of cooling tower or be further reduced to outdoor wet-bulb temperature Hereinafter, improving the efficiency of air conditioning cooling water system, the waste of the energy is avoided.Further, when outdoor wet-bulb temperature is higher, benefit The cooling water leaving water temperature of cooling tower can be made to reduce with supplementary heat exchanger, avoided since cooling water leaving water temperature is excessively high, it is cooling There is high voltage protective or surge phenomenon in water system.

For traditional cooling tower 200, the lower limit value of cooling water leaving water temperature is outdoor wet-bulb temperature.The present invention passes through auxiliary It helps heat exchanger 130 to cool down the air inlet of cooling tower 200, the lower limit value of cooling water leaving water temperature can be made close to outdoor dew point Temperature, even lower than outdoor dew-point temperature, greatly reduces the lower limit value of cooling water leaving water temperature.

When outdoor wet-bulb temperature is lower, the cooling water leaving water temperature of cooling tower 200 and outdoor wet-bulb temperature can be made same Step reduces, and even lower than outdoor 3 DEG C~5 DEG C of wet-bulb temperature greatly improves the efficiency of air conditioning cooling water system, is generally possible to mention It is high by 10%~15%.

When outdoor wet-bulb temperature is higher, the cooling water leaving water temperature of cooling tower 200 can be made to reduce, avoided due to cooling 200 cooling capacity of tower is insufficient, causes cooling water leaving water temperature excessively high, high voltage protective or surge phenomenon occurs in cooling water system.

Optionally, the air inlet of cooling tower 200 is arranged in supplementary heat exchanger 130.

Optionally, supplementary heat exchanger 130 can be geomantic omen heat exchanger.

Auxiliary switch 140 is used to control the working condition of supplementary heat exchanger 130.Optionally, auxiliary switch 140 can be control Supplementary heat exchanger 130 processed starts work or stops working, and is also possible to control the raising or drop of 130 working efficiency of supplementary heat exchanger It is low.

As a kind of optional embodiment, cooling water system is additionally provided with chilled water branch water inlet pipe 110 and chilled water branch Outlet pipe 120.The both ends of chilled water branch water inlet pipe 110 are connected to the chilled water outlet of the evaporator of air-conditioning system 300 respectively And supplementary heat exchanger 130 water inlet connection, chilled water branch outlet pipe 120 respectively with the evaporator of air-conditioning system 300 The connection of the water outlet of chilled water water return outlet and supplementary heat exchanger 130.Utilize chilled water branch water inlet pipe 110 and chilled water branch The partial freeze water of evaporator 300 is introduced into supplementary heat exchanger 130 by outlet pipe 120, and supplementary heat exchanger 130 utilizes chilled water The air inlet of cooling tower 200 is cooled down.

As a kind of optional embodiment, auxiliary switch 140 is arranged in chilled water branch water inlet pipe 110 or chilled water branch On outlet pipe 120.Auxiliary switch 140 can control into the chilled water in supplementary heat exchanger flow and whether introduce freezing Water.Optionally, auxiliary switch 140 can be solenoid valve.

Auxiliary switch 140 can control the on-off of chilled water branch water inlet pipe 110 or chilled water branch outlet pipe 120 in turn Whether control chilled water is able to enter supplementary heat exchanger 130, to adjust the working condition of supplementary heat exchanger 130.

For example, being opened by auxiliary switch 140, the partial freeze water for preparing air-conditioning system evaporator enters auxiliary heat-exchanging Device 130 cools down the air inlet of cooling tower 200 using chilled water, to can make cooling water to 200 supplement heat rejecter of cooling tower The close outdoor dew-point temperature of leaving water temperature.Generally, outdoor dew-point temperature is 3 DEG C~5 DEG C lower than outdoor wet-bulb temperature.

For another example, when outdoor wet-bulb temperature is lower, auxiliary switch 140 is opened, and partial freeze water is made to enter supplementary heat exchanger 130, auxiliary cooling is carried out to cooling tower 200, cooling water leaving water temperature can be made to reduce with outdoor wet-bulb temperature is synchronous, very To lower than outdoor wet-bulb temperature.

For another example, when outdoor wet-bulb temperature is higher, auxiliary switch 140 is opened, and partial freeze water is made to enter supplementary heat exchanger 130, auxiliary cooling is carried out to cooling tower 200, cooling water leaving water temperature can be made to further decrease, avoided due to cooling tower 200 cooling capacities are insufficient, cause cooling water leaving water temperature excessively high, high voltage protective or surge phenomenon occurs in cooling water system.

Further, the control of auxiliary switch 140 chilled water enters the flow of supplementary heat exchanger 130, changes to adjust auxiliary The cooling degree that hot device 130 enters the wind cooling tower 200, and then regulate and control cooling water leaving water temperature.

As a kind of optional embodiment, supplementary heat exchanger 130 can be one or more.When supplementary heat exchanger 130 When being multiple, multiple supplementary heat exchangers 130 can be arranged in parallel.

As a kind of optional embodiment, cooling water system is additionally provided with cooling water leaving water temperature sensors, cooling water water outlet Temperature sensor is used to measure the cooling water leaving water temperature of cooling tower 200.

Please continue to refer to shown in Fig. 1, the air-conditioning system of one embodiment of the invention includes condenser 300, evaporator 400, system Cold pipeline, cooling tower 200, cooling water outlet pipe 210, cooling water return pipe 220, supplementary heat exchanger 130 and auxiliary switch 140.

One end of cooling water outlet pipe 210 is connected to the cooling water outlet of cooling tower 200, the other end and condenser 300 connections.One end of cooling water return pipe 220 is connected to the cooling water water return outlet of cooling tower 200, the other end and condenser 300 Connection.Cooling water outlet pipe 210 and cooling water return pipe 220 utilize the system in the cooling water and condenser of the preparation of cooling tower 200 Cryogen heat exchange.

As a kind of optional embodiment, air-conditioning system can have multiple cooling towers 200 and connect with cooling tower cold But water outlet pipe 210 and cooling water return pipe 220.Based on same design, multiple cooling towers 200 are respectively equipped with auxiliary heat-exchanging Device 130.

Optionally, multiple cooling towers 200 pass through cooling water outlet pipe 210 and cooling water return pipe 220 and condensation respectively Device 300 connects, and is that the pipeline of 300 entrance of condenser connection is equipped with valve, for controlling the cooling water for entering condenser 300 Flow.

Cooling tower 200 forms cooling water by cooling water outlet pipe 210 and cooling water return pipe 220 and condenser 300 Circuit, optionally, chilled(cooling) water return (CWR) are equipped with cooling pump 230 and cooling water valve 240.Cooling pump 230 is for existing to cooling water Circulation provides power in chilled(cooling) water return (CWR).Cooling water valve 240 is used to control the flow of cooling water in chilled(cooling) water return (CWR).Further Ground, cooling pump 230 can make to be arranged on cooling water outlet pipe 210.Further, cooling water valve 240 is two, is respectively set On cooling water outlet pipe 210 and cooling water return pipe 220.Optionally, cooling water valve 240 can be solenoid valve.

For cooling down to the air inlet of cooling tower 200, i.e. the air inlet of cooling tower 200 first passes around supplementary heat exchanger 130 Supplementary heat exchanger 130 is cooling, enters back into cooling tower 200 and cools down to the water in cooling tower 200.Utilize supplementary heat exchanger pair The air inlet of cooling tower cools down, and then reduces the cooling water leaving water temperature of cooling tower.

Optionally, the air inlet of cooling tower 200 is arranged in supplementary heat exchanger 130.

Optionally, supplementary heat exchanger 130 can be geomantic omen heat exchanger.

Auxiliary switch 140 is used to control the working condition of supplementary heat exchanger 130.Optionally, auxiliary switch 140 can be control Supplementary heat exchanger 130 processed starts work or stops working, and is also possible to control the raising or drop of 130 working efficiency of supplementary heat exchanger It is low.Optionally, evaporator 400 is equipped with chilled water outlet pipe 410, chilled water return pipe 420, and evaporator 400 is gone out by chilled water Other refrigeration terminals of water pipe 410, chilled water return pipe 420 and air-conditioning system form chilled water circuit, set on chilled water circuit There are refrigerating water pump 430 and freezing penstock 440.Refrigerating water pump 430 provides power for recycling on chilled water circuit to chilled water.It is cold Freeze the flow that penstock 440 is used to control chilled water in chilled water circuit.

For example, being connected with indoor units on chilled water circuit.Optionally, indoor units can be one, be also possible to more It is a.

Optionally, refrigerating water pump 430 is arranged on chilled water return pipe 420.

Optionally, freezing penstock 440 is arranged on chilled water outlet pipe 410 or chilled water return pipe 420.Optionally, Freezing penstock 440 can be solenoid valve.Optionally, regulating valve 450 is additionally provided on chilled water circuit, regulating valve 450 is for adjusting Save the chilled water distribution in unit indoors in chilled water circuit.

Condenser 300 connects and composes refrigerant circuit by refrigeration pipeline with evaporator 400, is equipped with pressure in refrigerant circuit Contracting machine 310 and throttling set 320.

As a kind of optional embodiment, air-conditioning system is additionally provided with chilled water branch water inlet pipe 110 and chilled water branch goes out Water pipe 120.The both ends of chilled water branch water inlet pipe 110 are connected to and assist to change with the chilled water water outlet of evaporator 300 respectively The water inlet of hot device 130 is connected to, chilled water branch outlet pipe 120 respectively with the chilled water water return outlet and auxiliary of evaporator 300 The water outlet of heat exchanger 130 is connected to.To formed by evaporator 400, chilled water branch water inlet pipe 110, supplementary heat exchanger 130, Chilled water branch outlet pipe 120, the sequentially connected chilled water branch-path of evaporator 400.Utilize chilled water branch water inlet pipe 110 With chilled water branch outlet pipe 120, the partial freeze water of evaporator 300 is introduced into supplementary heat exchanger 130, supplementary heat exchanger 130 are cooled down using air inlet of the chilled water to cooling tower 200.

Optionally, chilled water branch water inlet pipe 110 is discharged by the chilled water of chilled water outlet pipe 410 and evaporator 400 Mouth connection, chilled water branch outlet pipe 120 are connected to by chilled water return pipe 420 with the chilled water water return outlet of evaporator 400.

As a kind of optional embodiment, auxiliary switch 140 is arranged in chilled water branch water inlet pipe 110 or chilled water branch On outlet pipe 120.Auxiliary switch 140 can control into the chilled water in supplementary heat exchanger flow and whether introduce freezing Water.Optionally, auxiliary switch 140 can be solenoid valve.

Auxiliary switch 140 can control the on-off of chilled water branch water inlet pipe 110 or chilled water branch outlet pipe 120 in turn Whether control chilled water is able to enter supplementary heat exchanger 130, to adjust the working condition of supplementary heat exchanger 130.

For example, being opened by auxiliary switch 140, the partial freeze water for preparing air-conditioning system evaporator enters auxiliary heat-exchanging Device 130 cools down the air inlet of cooling tower 200 using chilled water, to can make cooling water to 200 supplement heat rejecter of cooling tower The close outdoor dew-point temperature of leaving water temperature.Generally, outdoor dew-point temperature is 3 DEG C~5 DEG C lower than outdoor wet-bulb temperature.

For another example, when outdoor wet-bulb temperature is lower, auxiliary switch 140 is opened, and partial freeze water is made to enter supplementary heat exchanger 130, auxiliary cooling is carried out to cooling tower 200, cooling water leaving water temperature can be made to reduce with outdoor wet-bulb temperature is synchronous, very To lower than outdoor wet-bulb temperature.

For another example, when outdoor wet-bulb temperature is higher, auxiliary switch 140 is opened, and partial freeze water is made to enter supplementary heat exchanger 130, auxiliary cooling is carried out to cooling tower 200, cooling water leaving water temperature can be made to further decrease, avoided due to cooling tower 200 cooling capacities are insufficient, cause cooling water leaving water temperature excessively high, high voltage protective or surge phenomenon occurs in cooling water system.

Further, the control of auxiliary switch 140 chilled water enters the flow of supplementary heat exchanger 130, changes to adjust auxiliary The cooling degree that hot device 130 enters the wind cooling tower 200, and then regulate and control cooling water leaving water temperature.

As a kind of optional embodiment, supplementary heat exchanger 130 can be one or more.When supplementary heat exchanger 130 When being multiple, multiple supplementary heat exchangers 130 can be arranged in parallel.

As a kind of optional embodiment, air-conditioning system is additionally provided with cooling water leaving water temperature low sensor and wet-bulb temperature passes Sensor, cooling water leaving water temperature sensors are used to measure the cooling water leaving water temperature of cooling tower 200;Wet bulb temperature sensor is used for Measure the outdoor wet-bulb temperature of air-conditioning system.

The air conditioning cooling water system control method of one embodiment of the invention, includes the following steps:

Than the height of wet-bulb temperature than outdoor and the first preset temperature;

When outdoor wet-bulb temperature, which is lower than, is equal to the first preset temperature, aperture is opened or increased to control auxiliary switch 140.

Aperture is opened or increased by control auxiliary switch 140, can start supplementary heat exchanger 130 to cooling tower 200 Air inlet is cooled down, so that auxiliary cooling tower 200 cools down the cooling water in cooling tower 200, and then can reduce The leaving water temperature of cooling tower 200.Cooling water leaving water temperature can be made to reduce with outdoor wet-bulb temperature is synchronous, it is even lower than outdoor wet Ball temperature improves the cooling efficiency of air conditioning cooling water system.

When supplementary heat exchanger 130 passes through chilled water branch water inlet pipe 110 and chilled water branch outlet pipe 120 and air-conditioning system When the evaporator 300 of system is connected to, the air inlet of cooling tower 200 can be cooled down using the chilled water introduced.Although needing The cooling capacity (typically constitute from chilled water general refrigeration ability 5% or less) for introducing chilled water cools down the air inlet of cooling tower 200, But can be improved the efficiency of air conditioning cooling water system 10%~15%, totally it still is able to play apparently achieving energy conservation, improving The purpose of efficiency.

As a kind of optional embodiment, above-mentioned air conditioning cooling water system control method further includes following steps:

Than the height of wet-bulb temperature than outdoor and the second preset temperature;

When outdoor wet-bulb temperature is optionally greater than the second preset temperature, aperture is opened or increased to control auxiliary switch 140;Its In, the first preset temperature is lower than the second preset temperature.

Aperture is opened or increased by control auxiliary switch 140, can start supplementary heat exchanger 130 to cooling tower 200 Air inlet is cooled down, so that auxiliary cooling tower 200 cools down the cooling water in cooling tower 200, and then can be into one Step reduces the leaving water temperature of cooling tower 200, avoids causing cooling water leaving water temperature mistake since 200 cooling capacity of cooling tower is insufficient There is high voltage protective or surge phenomenon in height, cooling water system.

As a kind of optional embodiment, above-mentioned air conditioning cooling water system control method further includes following steps:

When outdoor wet-bulb temperature is higher than the first preset temperature and is lower than the second preset temperature, control auxiliary switch 140 is closed Close or reduce aperture.

As a kind of optional embodiment, the first preset temperature is 3~10 DEG C lower than the second preset temperature.Optionally, first Preset temperature is 25 DEG C, and the second preset temperature is 30 DEG C.

I.e. when outdoor wet-bulb temperature, which is lower than, is equal to 25 DEG C, control auxiliary switch 140 is opened or increases aperture, and then to cold But the air inlet of tower 200 is cooled down or reinforces cooling down, to further decrease cooling water leaving water temperature, reaches raising air conditioning cooling water The purpose of system energy efficiency.

When outdoor wet-bulb temperature is optionally greater than 30 DEG C, control auxiliary switch 140 is opened or increases aperture, and then to cooling The air inlet of tower 200 is cooled down or reinforces cooling down, to further decrease cooling water leaving water temperature, playing prevents cooling water from going out water temperature High purpose is spent, cooling water system is avoided high voltage protective or surge phenomenon occur.

When outdoor wet-bulb temperature is higher than 25 DEG C and is lower than 30 DEG C, i.e., outdoor wet-bulb temperature is between the first preset temperature and the When between two preset temperatures, aperture is closed or reduced to control auxiliary switch 140.At this point, cooling tower can be realized optimal efficiency.

The air conditioner system control method of one embodiment of the invention, includes the following steps:

Than the height of wet-bulb temperature than outdoor and the first preset temperature;

When outdoor wet-bulb temperature, which is lower than, is equal to the first preset temperature, aperture is opened or increased to control auxiliary switch 140.

Aperture is opened or increased by control auxiliary switch 140, can start supplementary heat exchanger 130 to cooling tower 200 Air inlet is cooled down, so that auxiliary cooling tower 200 cools down the cooling water in cooling tower 200, and then can reduce The leaving water temperature of cooling tower 200.Cooling water leaving water temperature can be made to reduce with outdoor wet-bulb temperature is synchronous, it is even lower than outdoor wet Ball temperature improves the cooling efficiency of air-conditioning system.

When supplementary heat exchanger 130 passes through chilled water branch water inlet pipe 110 and chilled water branch outlet pipe 120 and air-conditioning system When the evaporator 300 of system is connected to, the air inlet of cooling tower 200 can be cooled down using the chilled water introduced.Although needing The cooling capacity (typically constitute from chilled water general refrigeration ability 5% or less) for introducing chilled water cools down the air inlet of cooling tower 200, But can be improved the efficiency of air-conditioning system 10%~15%, totally it still is able to play apparently achieving energy conservation, improving efficiency Purpose.

As a kind of optional embodiment, above-mentioned air conditioner system control method further includes following steps:

Than the height of wet-bulb temperature than outdoor and the second preset temperature;

When outdoor wet-bulb temperature is optionally greater than the second preset temperature, aperture is opened or increased to control auxiliary switch 140;Its In, the first preset temperature is lower than the second preset temperature.

Aperture is opened or increased by control auxiliary switch 140, can start supplementary heat exchanger 130 to cooling tower 200 Air inlet is cooled down, so that auxiliary cooling tower 200 cools down the cooling water in cooling tower 200, and then can be into one Step reduces the leaving water temperature of cooling tower 200, avoids causing cooling water leaving water temperature mistake since 200 cooling capacity of cooling tower is insufficient There is high voltage protective or surge phenomenon in height, the cooling water system of air-conditioning system.

As a kind of optional embodiment, above-mentioned air conditioner system control method further includes following steps:

When outdoor wet-bulb temperature is higher than the first preset temperature and is lower than the second preset temperature, control auxiliary switch 140 is closed Close or reduce aperture.

As a kind of optional embodiment, the first preset temperature is lower than 5 DEG C of the second preset temperature.Optionally, first is default Temperature is 25 DEG C, and the second preset temperature is 30 DEG C.

I.e. when outdoor wet-bulb temperature, which is lower than, is equal to 25 DEG C, control auxiliary switch 140 is opened or increases aperture, and then to cold But the air inlet of tower 200 is cooled down or reinforces cooling down, to further decrease cooling water leaving water temperature, is reached and is improved air-conditioning system energy The purpose of effect.

When outdoor wet-bulb temperature is optionally greater than 30 DEG C, control auxiliary switch 140 is opened or increases aperture, and then to cooling The air inlet of tower 200 is cooled down or reinforces cooling down, to further decrease cooling water leaving water temperature, playing prevents cooling water from going out water temperature High purpose is spent, the cooling water system of air-conditioning system is avoided high voltage protective or surge phenomenon occur.

When outdoor wet-bulb temperature is higher than 25 DEG C and is lower than 30 DEG C, i.e., outdoor wet-bulb temperature is between the first preset temperature and the When between two preset temperatures, aperture is closed or reduced to control auxiliary switch 140.At this point, cooling tower can be realized optimal efficiency.

It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to To another element or it may be simultaneously present centering elements.On the contrary, when element is referred to as " directly existing " another element "upper", There is no intermediary elements.Term as used herein "vertical", "horizontal", "left" and "right" and similar statement are For illustrative purposes.

The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.

Claims (9)

1. a kind of air conditioning cooling water system, including cooling tower (200), cooling water outlet pipe (210) and cooling water return pipe (220), the cooling water outlet pipe (210), the cooling water return pipe (220) are connected to the cooling tower (200) respectively, are used It exchanges heat in using the cooling water in cooling tower (200) with condenser (300), which is characterized in that further include the water inlet of chilled water branch Manage (110), chilled water branch outlet pipe (120), supplementary heat exchanger (130) and auxiliary switch (140);
The both ends of the chilled water branch water inlet pipe (110) are connected to respectively with the chilled water water outlet of evaporator (400) and institute The water inlet connection of supplementary heat exchanger (130) is stated, the chilled water branch outlet pipe (120) is cold with evaporator (400) respectively Freeze the water outlet connection of water water return outlet and the supplementary heat exchanger (130);
The supplementary heat exchanger (130) is for cooling down the air inlet of the cooling tower (200);
The auxiliary switch (140) is used to control the working condition of the supplementary heat exchanger (130).
2. air conditioning cooling water system according to claim 1, which is characterized in that the auxiliary switch (140) is arranged in institute It states on chilled water branch water inlet pipe (110) or chilled water branch outlet pipe (120).
3. air conditioning cooling water system according to claim 1, which is characterized in that the cooling water system includes that cooling water goes out Water temperature sensor, the cooling water leaving water temperature sensors are used to measure the cooling water leaving water temperature of the cooling tower (200).
4. a kind of air-conditioning system, which is characterized in that the air-conditioning system includes condenser (300), evaporator (400), refrigerator pipes Road, cooling tower (200), cooling water outlet pipe (210), cooling water return pipe (220), chilled water branch water inlet pipe (110), freezing Water branch outlet pipe (120), supplementary heat exchanger (130) and auxiliary switch (140);
The condenser (300) connects and composes refrigerant circuit, the system by the refrigeration pipeline with the evaporator (400) Compressor (310) and throttling set (320) are equipped in refrigerant circuit;
The cooling water outlet pipe (210), the cooling water return pipe (220) are connected to the cooling tower (200) respectively, are used for It is exchanged heat using the cooling water in cooling tower (200) with the condenser (300);
The both ends of the chilled water branch water inlet pipe (110) be connected to respectively with the chilled water water outlet of the evaporator (400) with And the supplementary heat exchanger (130) water inlet connection, the chilled water branch outlet pipe (120) respectively with the evaporator (400) the water outlet connection of chilled water water return outlet and the supplementary heat exchanger (130);
The supplementary heat exchanger (130) is for cooling down the air inlet of the cooling tower (200);
The auxiliary switch (140) is used to control the working condition of the supplementary heat exchanger (130).
5. air-conditioning system according to claim 4, which is characterized in that the air-conditioning system includes that cooling water leaving water temperature passes Sensor and wet bulb temperature sensor;
The cooling water leaving water temperature sensors are used to measure the cooling water leaving water temperature of the cooling tower (200);
The wet bulb temperature sensor is used to measure the outdoor wet-bulb temperature of air-conditioning system.
6. a kind of control method of the air conditioning cooling water system as described in claims 1 to 3 any one, which is characterized in that institute Control method is stated to include the following steps:
Than the height of wet-bulb temperature than outdoor and the first preset temperature;
When the outdoor wet-bulb temperature, which is lower than, is equal to first preset temperature, control the auxiliary switch (140) open or Increase aperture.
7. control method according to claim 6, which is characterized in that the control method further includes following steps:
Than the height of wet-bulb temperature than outdoor and the second preset temperature;
When the outdoor wet-bulb temperature is optionally greater than second preset temperature, control the auxiliary switch (140) open or Increase aperture;
Wherein, first preset temperature is lower than second preset temperature.
8. control method according to claim 7, which is characterized in that the control method further includes following steps:
When the outdoor wet-bulb temperature is higher than first preset temperature and is lower than second preset temperature, control described auxiliary Switch (140) are helped to close or reduce aperture.
9. control method according to claim 7 or 8, which is characterized in that first preset temperature is more pre- than described second If temperature is 3~10 DEG C low.
CN201710330640.2A 2017-05-11 2017-05-11 Air conditioning cooling water system, air-conditioning system and air conditioning cooling water system control method CN107166582B (en)

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CN109246992B (en) * 2018-10-15 2020-11-13 珠海格力电器股份有限公司 Heat dissipation system of electric cabinet and related equipment thereof

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CN201218574Y (en) * 2008-06-04 2009-04-08 西安工程大学 Heat pipe cold recovery type evaporation-cooling high temperature water chilling unit
CN201327309Y (en) * 2008-10-15 2009-10-14 上海汽车资产经营有限公司 Open and close combined type multi-source double-effect energy tower
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