CN107166582A - 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
CN107166582A
CN107166582A CN201710330640.2A CN201710330640A CN107166582A CN 107166582 A CN107166582 A CN 107166582A CN 201710330640 A CN201710330640 A CN 201710330640A CN 107166582 A CN107166582 A CN 107166582A
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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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CN107166582B (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 that the present invention is provided, including cooling tower, cooling water outlet pipe and CWR, the cooling water outlet pipe, the CWR are connected with the cooling tower respectively, for being exchanged heat using the cooling water in cooling tower with condenser, characterized in that, also including supplementary heat exchanger and auxiliary switch;The supplementary heat exchanger is used to cool down the air intake of the cooling tower;The auxiliary switch is used for the working condition for controlling the supplementary heat exchanger.Above-mentioned air conditioning cooling water system, provided with supplementary heat exchanger, is cooled down using supplementary heat exchanger to the air intake of cooling tower, and then reduces the cooling water leaving water temperature of cooling tower.When outdoor wet-bulb temperature is relatively low, can make the cooling water leaving water temperature of cooling tower and outdoor wet-bulb temperature synchronously reduce or be further reduced to below outdoor wet-bulb temperature, improve the efficiency of air conditioning cooling water system, it is to 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

Present invention design 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 technology

It is not enough below traditional air conditioning cooling water system generally existing:When outdoor wet-bulb temperature is relatively low, cooling tower due to The factors such as type selecting, control, its cooling water leaving water temperature can not reduction synchronous with wet-bulb temperature, traditional high-efficiency frequency conversion cooling water system System is when cooling inflow temperature is relatively low, and efficiency, which occurs, to be substantially improved, if but cooling tower leaving water temperature can not be with wet-bulb temperature Synchronous reduction, then cause frequency conversion cooling water system larger energy waste occur.

The content of the invention

Based on this, it is necessary to synchronous with wet-bulb temperature can not reduce the energy waste caused for cooling water leaving water temperature There is provided a kind of air conditioning cooling water system, air-conditioning system and air conditioning cooling water system control method for problem.

A kind of air conditioning cooling water system that the present invention is provided, including cooling tower, cooling water outlet pipe and cooling water backwater Pipe, the cooling water outlet pipe, the CWR are connected with the cooling tower respectively, cold in cooling tower for utilizing But water exchanges heat with condenser, wherein, in addition to supplementary heat exchanger and auxiliary switch;

The supplementary heat exchanger is used to cool down the air intake of the cooling tower;

The auxiliary switch is used for the working condition for controlling the supplementary heat exchanger.

In one of which embodiment, the cooling water system also includes chilled water branch road water inlet pipe and chilled water branch Road outlet pipe;

The two ends of the chilled water branch road water inlet pipe are connected and the auxiliary with the chilled water delivery port of evaporator respectively The water inlet connection of heat exchanger, the chilled water water return outlet and the auxiliary of the chilled water branch road outlet pipe respectively with evaporator The delivery port connection of heat exchanger.

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

In one of which embodiment, the cooling water system includes cooling water leaving water temperature sensors, the cooling Water leaving water temperature sensors are used for the cooling water leaving water temperature for determining the cooling tower.

A kind of air-conditioning system that the present invention is also provided, wherein, the air-conditioning system includes condenser, evaporator, refrigerator pipes Road, cooling tower, cooling water outlet pipe, CWR, supplementary heat exchanger and auxiliary switch;

The condenser connects and composes refrigerant loop with the evaporator by the refrigeration pipe, and the refrigerant is returned Compressor and throttling arrangement are provided with road;

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

The supplementary heat exchanger is used to cool down the air intake of the cooling tower;

The auxiliary switch is used for the working condition for controlling the supplementary heat exchanger.

In one of which embodiment, the air-conditioning system also includes chilled water branch road water inlet pipe and chilled water branch road Outlet pipe;

The two ends of the chilled water branch road water inlet pipe are connected and described with the chilled water delivery port of the evaporator respectively The water inlet connection of supplementary heat exchanger, the chilled water branch road outlet pipe respectively with the chilled water water return outlet of the evaporator and The delivery port connection of the supplementary heat exchanger.

In one of which 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 for the cooling water leaving water temperature for determining the cooling tower;

The wet bulb temperature sensor is used for the outdoor wet-bulb temperature for determining air-conditioning system.

Present invention also offers a kind of control method of air conditioning cooling water system as described above, it is characterised in that described Control method comprises the following steps:

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

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

In one of which embodiment, the control method also comprises the following steps:

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

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

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

In one of which embodiment, the control method also comprises the following steps:

When the outdoor wet-bulb temperature is higher than first preset temperature and is less than second preset temperature, institute is controlled State auxiliary switch and close or reduce aperture.

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

Above-mentioned air conditioning cooling water system, provided with supplementary heat exchanger, is carried out cold using supplementary heat exchanger to the air intake of cooling tower But cool, and then reduce the cooling water leaving water temperature of cooling tower.When outdoor wet-bulb temperature is relatively low, the cooling of cooling tower can be made Water leaving water temperature and outdoor wet-bulb temperature synchronously reduce or be further reduced to below outdoor wet-bulb temperature, improve air conditioning cooling water The efficiency of system, it is to avoid the waste of the energy.

Further, when outdoor wet-bulb temperature is higher, the cooling water water outlet of cooling tower can be made using supplementary heat exchanger Temperature is reduced, it is to avoid because cooling water leaving water temperature is too high, high voltage protective or surge phenomenon occurs in cooling water system.

Brief description of the drawings

, below will be to institute in embodiment in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only one described in the present invention A little embodiments, for those of ordinary skill in the art, can also obtain other accompanying drawings according to these accompanying drawings.

Fig. 1 is air conditioning cooling water system structural representation;

Wherein,

110- chilled water branch road water inlet pipes;120- chilled water branch road outlet pipes;130- supplementary heat exchangers;140- auxiliary is opened Close;

200- cooling towers;210- cooling water outlet pipes;220- CWRs;230- cooling pumps;240- cooling water valves Door;

300- condensers;310- compressors;320- orifice unions;

400- evaporators;410- chilled water outlet pipes;420- chilled water return pipes;430- refrigerating water pumps;440- freezes water valve Door;450- regulating valves.

Embodiment

In order to make the purpose , technical scheme and advantage of the present invention be clearer, by the following examples, and with reference to attached Figure, is carried out further specifically to the air conditioning cooling water system of the present invention, air-conditioning system and air conditioning cooling water system control method It is bright.It should be appreciated that specific embodiment described herein is not intended to limit the present invention only to explain the present invention.

Refer to shown in Fig. 1, the air conditioning cooling water system of one embodiment of the invention includes cooling tower 200, cooling water water outlet Arrow represents the air intake side of cooling tower 200 in pipe 210, CWR 220, supplementary heat exchanger 130 and auxiliary switch 140, figure To and air-out direction.

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

Cooling tower 200 constitutes cooling water by cooling water outlet pipe 210 and CWR 220 with condenser 300 Loop, alternatively, chilled(cooling) water return (CWR) are provided with cooling pump 230 and cooling water valve 240.Cooling pump 230 is used to exist to cooling water Circulation provides power in chilled(cooling) water return (CWR).Cooling water valve 240 is used for the flow for controlling 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 set respectively On the cooling water outlet pipe 210 and CWR 220 being connected with the delivery port of cooling tower 200 and water inlet.It is optional Ground, cooling water valve 240 can be magnetic valve.

Supplementary heat exchanger 130 is used to cool down the air intake of cooling tower 200, i.e. the air intake of cooling tower 200 is first passed around Supplementary heat exchanger 130 is cooled down, and enters back into cooling tower 200 and the water in cooling tower 200 is cooled down.Utilize supplementary heat exchanger pair The air intake of cooling tower is cooled down, and then reduces the cooling water leaving water temperature of cooling tower.When outdoor wet-bulb temperature is relatively low, Can make the cooling water leaving water temperature of cooling tower and outdoor wet-bulb temperature synchronously reduce or be further reduced to outdoor wet-bulb temperature Hereinafter, the efficiency of air conditioning cooling water system is improved, it is to avoid the waste of the energy.Further, when outdoor wet-bulb temperature is higher, profit The cooling water leaving water temperature that can make cooling tower with supplementary heat exchanger is reduced, it is to avoid because cooling water leaving water temperature is too high, cooling There is high voltage protective or surge phenomenon in water system.

For traditional cooling tower 200, the lower limit of its cooling water leaving water temperature is outdoor wet-bulb temperature.The present invention is by auxiliary Help heat exchanger 130 to cool down the air intake of cooling tower 200, the close outdoor dew point of lower limit of cooling water leaving water temperature can be made Temperature, even below outdoor dew-point temperature, greatly reduces the lower limit of cooling water leaving water temperature.

When outdoor wet-bulb temperature is relatively low, the cooling water leaving water temperature and outdoor wet-bulb temperature of cooling tower 200 can be made same Step reduction, even below 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 carry It is high by 10%~15%.

When outdoor wet-bulb temperature is higher, can make the cooling water leaving water temperature of cooling tower 200 reduces, it is to avoid due to cooling The cooling capacity of tower 200 is not enough, causes cooling water leaving water temperature too high, high voltage protective or surge phenomenon occurs in cooling water system.

Alternatively, supplementary heat exchanger 130 is arranged on the air inlet of cooling tower 200.

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

Auxiliary switch 140 is used for the working condition for controlling supplementary heat exchanger 130.Alternatively, auxiliary switch 140 can be control Supplementary heat exchanger 130 processed starts work or is stopped or controls raising or the drop of the operating efficiency of supplementary heat exchanger 130 It is low.

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

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

Auxiliary switch 140 can control the break-make of chilled water branch road water inlet pipe 110 or chilled water branch road outlet pipe 120 and then Control whether chilled water can enter supplementary heat exchanger 130, so as to adjust the working condition of supplementary heat exchanger 130.

For example, being opened by auxiliary switch 140, partial freeze water prepared by air-conditioning system evaporator is set to enter auxiliary heat-exchanging Device 130, is cooled down using chilled water to the air intake of cooling tower 200, so as to the supplement heat rejecter of cooling tower 200, can make cooling water The close outdoor dew-point temperature of leaving water temperature.Usually, outdoor dew-point temperature is lower than outdoor wet-bulb temperature 3 DEG C~5 DEG C.

And for example, when outdoor wet-bulb temperature is relatively low, auxiliary switch 140 is opened, and partial freeze water is entered supplementary heat exchanger 130, auxiliary cooling is carried out to cooling tower 200, cooling water leaving water temperature can be made synchronously to be reduced with outdoor wet-bulb temperature, very To less 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 entered supplementary heat exchanger 130, auxiliary cooling is carried out to cooling tower 200, cooling water leaving water temperature can be made further to reduce, it is to avoid due to cooling tower 200 cooling capacities are not enough, cause cooling water leaving water temperature too 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, is changed so as to adjust auxiliary Hot device 130 regulates and controls cooling water leaving water temperature to the cooling degree of the air intake of cooling tower 200.

As a kind of optional embodiment, supplementary heat exchanger 130 can be one or more.When supplementary heat exchanger 130 For it is multiple when, 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 for the cooling water leaving water temperature for determining 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, CWR 220, supplementary heat exchanger 130 and auxiliary switch 140.

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

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

Alternatively, multiple cooling towers 200 pass through cooling water outlet pipe 210 and CWR 220 and condensation respectively Device 300 is connected, and is that the pipeline of the entrance of condenser 300 connection is provided with valve, for controlling the cooling water into condenser 300 Flow.

Cooling tower 200 constitutes cooling water by cooling water outlet pipe 210 and CWR 220 with condenser 300 Loop, alternatively, chilled(cooling) water return (CWR) are provided with cooling pump 230 and cooling water valve 240.Cooling pump 230 is used to exist to cooling water Circulation provides power in chilled(cooling) water return (CWR).Cooling water valve 240 is used for the flow for controlling 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 set respectively On cooling water outlet pipe 210 and CWR 220.Alternatively, cooling water valve 240 can be magnetic valve.

Supplementary heat exchanger 130 is used to cool down the air intake of cooling tower 200, i.e. the air intake of cooling tower 200 is first passed around Supplementary heat exchanger 130 is cooled down, and enters back into cooling tower 200 and the water in cooling tower 200 is cooled down.Utilize supplementary heat exchanger pair The air intake of cooling tower is cooled down, and then reduces the cooling water leaving water temperature of cooling tower.

Alternatively, supplementary heat exchanger 130 is arranged on the air inlet of cooling tower 200.

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

Auxiliary switch 140 is used for the working condition for controlling supplementary heat exchanger 130.Alternatively, auxiliary switch 140 can be control Supplementary heat exchanger 130 processed starts work or is stopped or controls raising or the drop of the operating efficiency of supplementary heat exchanger 130 It is low.Alternatively, evaporator 400 is provided with chilled water outlet pipe 410, chilled water return pipe 420, and evaporator 400 is gone out by chilled water Set on water pipe 410, chilled water return pipe 420 and other refrigeration terminal composition chilled water circuits of air-conditioning system, chilled water circuit There are refrigerating water pump 430 and freezing penstock 440.Refrigerating water pump 430 is used to circulate chilled water on chilled water circuit offer power.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.Alternatively, indoor units can be one or many It is individual.

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

Alternatively, freezing penstock 440 is arranged on chilled water outlet pipe 410 or chilled water return pipe 420.Alternatively, It can be magnetic valve to freeze penstock 440.Alternatively, regulating valve 450 is additionally provided with chilled water circuit, regulating valve 450 is used to adjust Save the distribution of chilled water indoors in unit in chilled water circuit.

Condenser 300 is connected and composed in refrigerant loop, refrigerant loop provided with pressure with evaporator 400 by refrigeration pipe Contracting machine 310 and throttling arrangement 320.

As a kind of optional embodiment, air-conditioning system is additionally provided with chilled water branch road water inlet pipe 110 and chilled water branch road goes out Water pipe 120.The two ends of chilled water branch road water inlet pipe 110 connect and aided in change with the chilled water delivery port of evaporator 300 respectively The water inlet connection of hot device 130, the chilled water water return outlet and auxiliary of chilled water branch road outlet pipe 120 respectively with evaporator 300 The delivery port connection of heat exchanger 130.So as to formed by evaporator 400, chilled water branch road water inlet pipe 110, supplementary heat exchanger 130, The chilled water branch-path that chilled water branch road outlet pipe 120, evaporator 400 are sequentially connected.Utilize chilled water branch road water inlet pipe 110 With chilled water branch road 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 chilled water to the air intake of cooling tower 200.

Alternatively, the chilled water water outlet that chilled water branch road water inlet pipe 110 passes through chilled water outlet pipe 410 and evaporator 400 Mouth connection, chilled water branch road outlet pipe 120 is connected 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 on chilled water branch road water inlet pipe 110 or chilled water branch road On outlet pipe 120.Auxiliary switch 140 can control the flow of the chilled water entered in supplementary heat exchanger and whether introduce freezing Water.Alternatively, auxiliary switch 140 can be magnetic valve.

Auxiliary switch 140 can control the break-make of chilled water branch road water inlet pipe 110 or chilled water branch road outlet pipe 120 and then Control whether chilled water can enter supplementary heat exchanger 130, so as to adjust the working condition of supplementary heat exchanger 130.

For example, being opened by auxiliary switch 140, partial freeze water prepared by air-conditioning system evaporator is set to enter auxiliary heat-exchanging Device 130, is cooled down using chilled water to the air intake of cooling tower 200, so as to the supplement heat rejecter of cooling tower 200, can make cooling water The close outdoor dew-point temperature of leaving water temperature.Usually, outdoor dew-point temperature is lower than outdoor wet-bulb temperature 3 DEG C~5 DEG C.

And for example, when outdoor wet-bulb temperature is relatively low, auxiliary switch 140 is opened, and partial freeze water is entered supplementary heat exchanger 130, auxiliary cooling is carried out to cooling tower 200, cooling water leaving water temperature can be made synchronously to be reduced with outdoor wet-bulb temperature, very To less 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 entered supplementary heat exchanger 130, auxiliary cooling is carried out to cooling tower 200, cooling water leaving water temperature can be made further to reduce, it is to avoid due to cooling tower 200 cooling capacities are not enough, cause cooling water leaving water temperature too 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, is changed so as to adjust auxiliary Hot device 130 regulates and controls cooling water leaving water temperature to the cooling degree of the air intake of cooling tower 200.

As a kind of optional embodiment, supplementary heat exchanger 130 can be one or more.When supplementary heat exchanger 130 For it is multiple when, 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 is passed Sensor, cooling water leaving water temperature sensors are used for the cooling water leaving water temperature for determining cooling tower 200;Wet bulb temperature sensor is used for Determine the outdoor wet-bulb temperature of air-conditioning system.

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

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

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

By controlling auxiliary switch 140 to open or increase aperture, supplementary heat exchanger 130 can be started to cooling tower 200 Air intake is cooled down, so that auxiliary cooling tower 200 is cooled down to the cooling water in cooling tower 200, and then can be reduced The leaving water temperature of cooling tower 200.Cooling water leaving water temperature can be made synchronously to be reduced with outdoor wet-bulb temperature, it is even below outdoor wet Ball temperature, improves the cooling efficiency of air conditioning cooling water system.

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

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

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

By controlling auxiliary switch 140 to open or increase aperture, supplementary heat exchanger 130 can be started to cooling tower 200 Air intake is cooled down, so that auxiliary cooling tower 200 is cooled down to the cooling water in cooling tower 200, and then can enter one The leaving water temperature of step reduction cooling tower 200, it is to avoid because the cooling capacity of cooling tower 200 is not enough, cause cooling water leaving water temperature mistake 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 also comprises the following steps:

When outdoor wet-bulb temperature is higher than the first preset temperature and is less 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 the second preset temperature 3~10 DEG C.Alternatively, 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 less than, is equal to 25 DEG C, aperture is opened or increased to control auxiliary switch 140, and then to cold But the air intake of tower 200 is cooled down or strengthened cooling, so as to further reduce 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, aperture is opened or increased to control auxiliary switch 140, and then to cooling The air intake of tower 200 is cooled down or strengthened cooling, so as to further reduce cooling water leaving water temperature, playing prevents cooling water from going out water temperature Spend high purpose, it is to avoid high voltage protective or surge phenomenon occurs in cooling water system.

When outdoor wet-bulb temperature is higher than 25 DEG C and less 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.Now, cooling tower can realize optimal efficiency.

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

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

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

By controlling auxiliary switch 140 to open or increase aperture, supplementary heat exchanger 130 can be started to cooling tower 200 Air intake is cooled down, so that auxiliary cooling tower 200 is cooled down to the cooling water in cooling tower 200, and then can be reduced The leaving water temperature of cooling tower 200.Cooling water leaving water temperature can be made synchronously to be reduced with outdoor wet-bulb temperature, it is even below outdoor wet Ball temperature, improves the cooling efficiency of air-conditioning system.

When supplementary heat exchanger 130 passes through chilled water branch road water inlet pipe 110 and chilled water branch road outlet pipe 120 and air-conditioning system When the evaporator 300 of system is connected, the air intake of cooling tower 200 can be cooled down using the chilled water introduced.Although needing The cold (typically constitute from chilled water general refrigeration ability less than 5%) for introducing chilled water is cooled down to the air intake of cooling tower 200, But the efficiency of air-conditioning system 10%~15% can be improved, 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 also comprises the following steps:

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

By controlling auxiliary switch 140 to open or increase aperture, supplementary heat exchanger 130 can be started to cooling tower 200 Air intake is cooled down, so that auxiliary cooling tower 200 is cooled down to the cooling water in cooling tower 200, and then can enter one The leaving water temperature of step reduction cooling tower 200, it is to avoid because the cooling capacity of cooling tower 200 is not enough, cause cooling water leaving water temperature mistake 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 also comprises the following steps:

When outdoor wet-bulb temperature is higher than the first preset temperature and is less 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 less than 5 DEG C of the second preset temperature.Alternatively, 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 less than, is equal to 25 DEG C, aperture is opened or increased to control auxiliary switch 140, and then to cold But the air intake of tower 200 is cooled down or strengthened cooling, so as to further reduce cooling water leaving water temperature, reaches raising air-conditioning system energy The purpose of effect.

When outdoor wet-bulb temperature is optionally greater than 30 DEG C, aperture is opened or increased to control auxiliary switch 140, and then to cooling The air intake of tower 200 is cooled down or strengthened cooling, so as to further reduce cooling water leaving water temperature, playing prevents cooling water from going out water temperature Spend high purpose, it is to avoid high voltage protective or surge phenomenon occurs in the cooling water system of air-conditioning system.

When outdoor wet-bulb temperature is higher than 25 DEG C and less 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.Now, cooling tower can realize optimal efficiency.

It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element Or can also have element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to To another element or it may be simultaneously present centering elements.On the contrary, when element be referred to as " directly existing " another element " on " when, In the absence of intermediary element.Term as used herein " vertically ", " level ", "left", "right" and similar statement are For illustrative purposes.

Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one 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 the guarantor of the present invention Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.

Claims (11)

1. a kind of air conditioning cooling water system, including cooling tower (200), cooling water outlet pipe (210) and CWR (220), the cooling water outlet pipe (210), the CWR (220) are connected with the cooling tower (200) respectively, are used Cooling water in using cooling tower (200) exchanges heat with condenser (300), it is characterised in that also including supplementary heat exchanger (130) And auxiliary switch (140);
The supplementary heat exchanger (130) is used to cool down the air intake of the cooling tower (200);
The auxiliary switch (140) is used for the working condition for controlling the supplementary heat exchanger (130).
2. air conditioning cooling water system according to claim 1, it is characterised in that the cooling water system also includes chilled water Branch road water inlet pipe (110) and chilled water branch road outlet pipe (120);
The two ends of the chilled water branch road water inlet pipe (110) are connected and institute with the chilled water delivery port of evaporator (400) respectively The water inlet connection of supplementary heat exchanger (130) is stated, the chilled water branch road outlet pipe (120) is cold with evaporator (400) respectively Freeze the delivery port connection of water water return outlet and the supplementary heat exchanger (130).
3. air conditioning cooling water system according to claim 2, it is characterised in that the auxiliary switch (140) is arranged on institute State on chilled water branch road water inlet pipe (110) or chilled water branch road outlet pipe (120).
4. air conditioning cooling water system according to claim 1, it is characterised in that the cooling water system goes out including cooling water Water temperature sensor, the cooling water leaving water temperature sensors are used for the cooling water leaving water temperature for determining the cooling tower (200).
5. a kind of air-conditioning system, it is characterised in that the air-conditioning system includes condenser (300), evaporator (400), refrigerator pipes Road, cooling tower (200), cooling water outlet pipe (210), CWR (220), supplementary heat exchanger (130) and auxiliary are opened Close (140);
The condenser (300) connects and composes refrigerant loop, the system with the evaporator (400) by the refrigeration pipe Compressor (310) and throttling arrangement (320) are provided with refrigerant circuit;
The cooling water outlet pipe (210), the CWR (220) are connected with the cooling tower (200) respectively, are used for Exchanged heat using the cooling water in cooling tower (200) and the condenser (300);
The supplementary heat exchanger (130) is used to cool down the air intake of the cooling tower (200);
The auxiliary switch (140) is used for the working condition for controlling the supplementary heat exchanger (130).
6. air-conditioning system according to claim 5, it is characterised in that the air-conditioning system also includes chilled water branch road and intake Manage (110) and chilled water branch road outlet pipe (120);
The two ends of the chilled water branch road water inlet pipe (110) connected respectively with the chilled water delivery port of the evaporator (400) with And the supplementary heat exchanger (130) water inlet connection, the chilled water branch road outlet pipe (120) respectively with the evaporator (400) the delivery port connection of chilled water water return outlet and the supplementary heat exchanger (130).
7. air-conditioning system according to claim 6, it is characterised in that the air-conditioning system is passed including cooling water leaving water temperature Sensor and wet bulb temperature sensor;
The cooling water leaving water temperature sensors are used for the cooling water leaving water temperature for determining the cooling tower (200);
The wet bulb temperature sensor is used for the outdoor wet-bulb temperature for determining air-conditioning system.
8. a kind of control method of air conditioning cooling water system as described in Claims 1-4 any one, it is characterised in that institute Control method is stated to comprise the following steps:
Than wet-bulb temperature than outdoor and the height of the first preset temperature;
When the outdoor wet-bulb temperature, which is less than, is equal to first preset temperature, control the auxiliary switch (140) open or Increase aperture.
9. control method according to claim 8, it is characterised in that the control method also comprises the following steps:
Than wet-bulb temperature than outdoor and the height of 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 less than second preset temperature.
10. control method according to claim 9, it is characterised in that the control method also comprises the following steps:
When the outdoor wet-bulb temperature is higher than first preset temperature and is less than second preset temperature, control described auxiliary Switch (140) is helped to close or reduce aperture.
11. the control method according to claim 9 or 10, it is characterised in that first preset temperature is than described second Preset temperature is low 3~10 DEG C.
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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