CN116839127A

CN116839127A - Energy-saving air conditioning system

Info

Publication number: CN116839127A
Application number: CN202310855597.7A
Authority: CN
Inventors: 师宇腾
Original assignee: National Library National Library Of China National Ancient Books Protection Center Of China National Classics Museum
Current assignee: National Library National Library Of China National Ancient Books Protection Center Of China National Classics Museum
Priority date: 2023-07-12
Filing date: 2023-07-12
Publication date: 2023-10-03

Abstract

The present disclosure relates to an energy-saving air conditioning system. The energy-saving air conditioning system comprises a refrigerating module, a heating module and an air conditioning unit, wherein the energy-saving air conditioning system can directly provide a cold source for the constant temperature and humidity unit through a refrigerator with higher energy efficiency when in operation in summer, and can directly enable natural cold sources outside users to generate chilled water to provide the cold source for the constant temperature and humidity unit when in operation in transitional seasons and winter, so that higher energy-saving effect is achieved; meanwhile, the system comprises an emergency operation mode under the conditions of extreme high temperature and high humidity in summer and single-point pipeline faults in winter, and double backup operation from a cold source to a unit is realized, so that the energy-saving air conditioning system has higher operation stability, and therefore, the energy-saving air conditioning system has wider application scenes.

Description

Energy-saving air conditioning system

Technical Field

The disclosure relates to the field of heating ventilation and air conditioning, in particular to an energy-saving air conditioning system.

Background

In large building sites, central air conditioning units with different functions are often required to be equipped for different areas according to different use functions, for example, for common office scenes, common air conditioning units are used, for data centers, libraries and other storehouses, constant temperature and humidity units are required to be equipped, and the constant temperature and humidity units are required to be kept in a non-rest running state all the year round.

In the prior art, the cold source of the constant temperature and humidity unit is single and cannot be shared with the common air conditioning unit, so that the configuration scheme of the cooling water cold source and the local compressor is only provided for adapting to winter scenes, the system cold source is single, the energy-saving effect is poor, and the use cost is high. And because no standby cold source exists, the system operation stability is not high, and when a shutdown accident occurs, the influence on a data center or a warehouse and other warehouses is large.

Accordingly, there is a need for one or more approaches to address the above-described problems.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

It is an object of the present disclosure to provide an energy-saving air conditioning system that overcomes, at least in part, one or more of the problems due to the limitations and disadvantages of the related art.

According to one aspect of the present disclosure, there is provided an energy-saving air conditioning system, a refrigeration module, a heating module, an air conditioning unit, wherein:

the refrigeration module comprises an open cooling tower, a closed cooling tower, a water tank, a first plate heat exchanger and a refrigerator, and is used for providing a cold source for the air conditioning unit through the preset combined start-stop control of the open cooling tower, the closed cooling tower, the water tank, the first plate heat exchanger, the refrigerator and a valve in the refrigeration module when the energy-saving air conditioning system is operated in a summer mode, a transitional season mode and a winter mode respectively;

the heating module comprises a municipal heating module and a second plate heat exchanger, and is used for providing a heat source for the air conditioning unit when the energy-saving air conditioning system operates in a winter mode;

the air conditioning unit comprises a common air conditioning unit and a constant temperature and humidity unit, wherein the common air conditioning unit is used for receiving a cold source of the refrigerating module when the energy-saving air conditioning system is operated in a summer mode and providing refrigerating air conditioning for a service area of the common air conditioning unit, the common air conditioning unit is used for receiving a heat source of the heating module when the energy-saving air conditioning system is operated in a winter mode and providing heating air conditioning for the service area of the common air conditioning unit, and the constant temperature and humidity unit is used for receiving a cold source of the refrigerating module when the energy-saving air conditioning system is operated in the summer mode, the transition season mode and the winter mode and providing refrigerating air conditioning for the service area of the constant temperature and humidity unit.

In one exemplary embodiment of the present disclosure, in the refrigeration module of the system:

the open cooling tower is respectively connected with the water tank and the refrigerator through pipelines, and is used for providing chilled water in a first preset temperature range for the water tank when the energy-saving air conditioning system operates in a winter mode; the open cooling tower is used for providing cooling chilled water in a fourth preset temperature interval for the water tank when the energy-saving air conditioning system operates in a transition season mode; the open cooling tower is also used for providing cooling water in a second preset temperature interval for the refrigerator when the energy-saving air conditioning system is operated in a summer mode;

the closed cooling tower is respectively connected with the water tank and the constant temperature and humidity unit through pipelines, is used for providing chilled water in a first preset temperature interval for the water tank when the energy-saving air conditioning system operates in a winter mode, and is also used for providing cooling water in a second preset temperature interval for the constant temperature and humidity unit when the energy-saving air conditioning system operates in a transition season mode and a summer mode;

the first plate heat exchanger is connected with the water tank and the constant temperature and humidity unit respectively through pipelines, and is used for carrying out heat exchange on the chilled water in a first preset temperature interval in the water tank and the chilled water between the first plate heat exchanger and the constant temperature and humidity unit when the energy-saving air conditioning system is operated in a winter mode, and controlling the temperature regulation of the chilled water between the first plate heat exchanger and the constant temperature and humidity unit in a third preset temperature interval; the first plate heat exchanger is further used for performing heat exchange between cooling chilled water in a fourth preset temperature interval in the water tank and cooling chilled water between the first plate heat exchanger and the constant temperature and humidity unit when the energy-saving air conditioning system is operated in a transition season mode, and the temperature of the cooling chilled water between the first plate heat exchanger and the constant temperature and humidity unit is regulated and controlled in a fifth preset temperature interval;

the refrigerator is connected with the common air conditioning unit and the constant temperature and humidity unit through pipelines respectively, and is used for generating chilled water in a third preset temperature range based on the cooling water in the second preset temperature range provided by the open cooling tower when the energy-saving air conditioning system operates in a summer mode, and providing the chilled water in the third preset temperature range for the common air conditioning unit and the constant temperature and humidity unit.

In an exemplary embodiment of the present disclosure, the system further comprises:

the water tank is placed indoors and subjected to heat preservation and anti-freezing treatment.

the water supplementing module is connected with the open cooling tower and the closed cooling tower through pipelines respectively and is used for supplementing the water levels of the open cooling tower and the closed cooling tower to preset water levels based on a preset control method.

In one exemplary embodiment of the present disclosure, in the heating module of the system:

and the heating module is used for exchanging municipal heat sources provided by the municipal heating power module through the second plate heat exchanger to provide heat sources for a common air conditioning unit of the air conditioning unit when the energy-saving air conditioning system is operated in a winter mode, so that the common air conditioning unit provides heating air conditioning for a service area of the common air conditioning unit.

In an exemplary embodiment of the present disclosure, in the air conditioning unit of the system, the constant temperature and humidity unit further includes a fan, a cooling water coil, a compressor, a chilled water coil:

the cooling water coil pipe is used for receiving cooling water in a second preset temperature interval of the closed cooling tower, generating chilled water in a third preset temperature interval through a compressor based on the cooling water in the second preset temperature interval, and circulating the chilled water in the third preset temperature interval generated through the compressor in the cooling water coil pipe;

the freezing water coil pipe is used for receiving the freezing water in a third preset temperature interval of the first plate heat exchanger and the refrigerator, and circulating the freezing water in the third preset temperature interval in the cooling water coil pipe;

the fan is used for enabling air in the constant temperature and humidity unit to circulate, so that air exchanges heat with the cooling water coil pipe and the freezing water coil pipe, and refrigerating air conditioning is further provided for a service area of the constant temperature and humidity unit.

In an exemplary embodiment of the present disclosure, in the air conditioning unit of the system, the constant temperature and humidity unit further includes a water mixing module:

the water mixing module comprises a proportional control valve, a one-way valve and a circulating pump, the water mixing module is connected with a cooling water coil pipe of the constant temperature and humidity unit, and the water mixing module is used for enabling cooling chilled water in the cooling water coil pipe to circulate between the cooling water coil pipe and the water mixing module through a preset control method when the water temperature of cooling chilled water in a fifth preset temperature interval provided by the first plate heat exchanger is higher than the upper limit of the third preset temperature interval and lower than the lower limit of the second preset temperature interval when the energy-saving air conditioning system operates in a transitional season mode, so that the water temperature of the cooling chilled water provided by the first plate heat exchanger is raised to the second preset temperature interval for the cooling water coil pipe of the constant temperature and humidity unit.

In one exemplary embodiment of the present disclosure, the system further comprises a first emergency mode:

when the energy-saving air conditioning system operates in a winter mode, if a pipeline between the first plate heat exchanger and the constant temperature and humidity unit fails so as not to provide a cold source for the constant temperature and humidity unit, the valve between the first plate heat exchanger and the constant temperature and humidity unit is closed, the valve between the second plate heat exchanger and the common air conditioning unit is closed, the valve between the constant temperature and humidity unit and the common air conditioning unit is opened, and the number of the input common air conditioning units is adjusted so that the common air conditioning unit provides cooling water with a second preset temperature interval for the constant temperature and humidity unit.

In one exemplary embodiment of the present disclosure, the system further comprises a second emergency mode:

when the energy-saving air conditioning system operates in a summer mode, if the humidity of a service area of the constant temperature and humidity unit exceeds a preset value, and the opening degree of a chilled water coil pipe of the constant temperature and humidity unit and the power of an electric heating module are both up to the maximum value, the municipal heat source provided by the municipal thermal module is exchanged through the second plate heat exchanger to provide a heat source for the constant temperature and humidity unit of the air conditioning unit so as to provide a heat source for the dehumidification function of the constant temperature and humidity unit.

The energy-saving air conditioning system in the exemplary embodiment of the disclosure comprises a refrigerating module, a heating module and an air conditioning unit, wherein the energy-saving air conditioning system can directly provide a cold source for the constant temperature and humidity unit through a refrigerator with higher energy efficiency when operating in a summer mode, and can directly enable natural cold sources outside a user to generate chilled water to provide the cold source for the constant temperature and humidity unit when operating in a transitional season and winter, so that a higher energy-saving effect is achieved; meanwhile, the system comprises an emergency operation mode under the conditions of extreme high temperature and high humidity in summer and single-point pipeline faults in winter, and double backup operation from a cold source to a unit is realized, so that the energy-saving air conditioning system has higher operation stability, and therefore, the energy-saving air conditioning system has wider application scenes.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

FIG. 1 illustrates a block diagram of an energy efficient air conditioning system according to an exemplary embodiment of the present disclosure;

FIG. 2 illustrates a block diagram of a summer mode operation of an energy efficient air conditioning system according to an exemplary embodiment of the present disclosure;

FIG. 3 illustrates another block diagram of an energy efficient air conditioning system in summer mode operation according to an exemplary embodiment of the present disclosure;

FIG. 4 illustrates a block diagram of an off-season mode operation of an energy efficient air conditioning system according to an exemplary embodiment of the present disclosure;

FIG. 5 illustrates another block diagram of an energy efficient air conditioning system during out-of-season mode operation according to an exemplary embodiment of the present disclosure;

FIG. 6 illustrates another block diagram of an energy efficient air conditioning system during out-of-season mode operation according to an exemplary embodiment of the present disclosure;

FIG. 7 illustrates another block diagram of an energy efficient air conditioning system during out-of-season mode operation according to an exemplary embodiment of the present disclosure;

FIG. 8 illustrates a block diagram of a winter mode operation of an energy efficient air conditioning system in accordance with an exemplary embodiment of the present disclosure;

FIG. 9 illustrates a first emergency mode operational block diagram of an energy efficient air conditioning system according to an exemplary embodiment of the present disclosure;

fig. 10 illustrates a second emergency mode operation structural block diagram of an energy saving air conditioning system according to an exemplary embodiment of the present disclosure.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the disclosed aspects may be practiced without one or more of the specific details, or with other methods, components, materials, devices, steps, etc. In other instances, well-known structures, methods, devices, implementations, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.

The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, or in one or more software-hardened modules, or in different networks and/or processor devices and/or microcontroller devices.

In the present exemplary embodiment, there is first provided an energy-saving air conditioning system; referring to fig. 1, the energy-saving air conditioning system includes a cooling module, a heating module, and an air conditioning unit, wherein:

the refrigeration module comprises an open cooling tower 100, a closed cooling tower 200, a water tank 300, a first plate heat exchanger 400 and a refrigerator 500, and is used for providing a cold source for the air conditioning unit through the preset combined start-stop control of the open cooling tower 100, the closed cooling tower 200, the water tank 300, the first plate heat exchanger 400, the refrigerator 500 and valves in the refrigeration module when the energy-saving air conditioning system is operated in a summer mode, a transitional season mode and a winter mode respectively;

the heating module comprises a municipal thermal module 600 and a second plate heat exchanger 700, and is used for providing a heat source for the air conditioning unit when the energy-saving air conditioning system operates in a winter mode;

the air conditioning unit comprises a common air conditioning unit 800 and a constant temperature and humidity unit 900, wherein the common air conditioning unit 800 is used for receiving a cold source of the refrigerating module when the energy-saving air conditioning system is operated in a summer mode, providing refrigerating air conditioning for a service area of the common air conditioning unit 800, the common air conditioning unit 800 is used for receiving a heat source of the heating module when the energy-saving air conditioning system is operated in a winter mode, providing heating air conditioning for the service area of the common air conditioning unit 800, and the constant temperature and humidity unit 900 is used for receiving the cold source of the refrigerating module when the energy-saving air conditioning system is operated in a summer mode, a transitional season mode and a winter mode, and providing refrigerating air conditioning for the service area of the constant temperature and humidity unit 900.

Next, an energy-saving air conditioning system in the present exemplary embodiment will be further described.

Embodiment one:

an energy-saving air conditioning system comprises a refrigeration module, a heating module and an air conditioning unit, wherein:

In an embodiment of the present example, in the refrigeration module of the system:

the open cooling tower 100 is respectively connected with the water tank 300 and the refrigerator 500 through pipelines, and the open cooling tower 100 is used for providing chilled water in a first preset temperature range for the water tank 300 when the energy-saving air conditioning system operates in a winter mode; the open cooling tower 100 is configured to provide cooling chilled water in a fourth preset temperature range for the water tank 300 when the energy-saving air conditioning system is operated in the transition season mode; the open cooling tower 100 is further configured to provide cooling water for the refrigerator 500 in a second preset temperature range when the energy-saving air conditioning system is operated in a summer mode;

the closed cooling tower 200 is respectively connected with the water tank 300 and the constant temperature and humidity unit 900 through pipelines, the closed cooling tower 200 is used for providing chilled water in a first preset temperature interval for the water tank 300 when the energy-saving air conditioning system operates in a winter mode, and the closed cooling tower 200 is also used for providing cooling water in a second preset temperature interval for the constant temperature and humidity unit 900 when the energy-saving air conditioning system operates in a transition season mode and a summer mode;

the first plate heat exchanger 400 is connected with the water tank 300 and the constant temperature and humidity unit 900 respectively through pipelines, and when the energy-saving air conditioning system operates in a winter mode, the first plate heat exchanger 400 is used for performing heat exchange between chilled water in a first preset temperature interval in the water tank 300 and chilled water between the first plate heat exchanger 400 and the constant temperature and humidity unit 900, and the temperature regulation of the chilled water between the first plate heat exchanger 400 and the constant temperature and humidity unit 900 is controlled in a third preset temperature interval; when the energy-saving air conditioning system is operated in the transition season mode, the first plate heat exchanger 400 is further used for performing heat exchange between the cooling chilled water in the fourth preset temperature interval in the water tank 300 and the cooling chilled water between the first plate heat exchanger 400 and the constant temperature and humidity unit 900, and controlling the temperature adjustment of the cooling chilled water between the first plate heat exchanger 400 and the constant temperature and humidity unit 900 in the fifth preset temperature interval;

the refrigerator 500 is connected with the common air conditioning unit 800 and the constant temperature and humidity unit 900 through pipelines, and the refrigerator 500 is configured to generate chilled water in a third preset temperature range based on the cooling water in the second preset temperature range provided by the open cooling tower 100 when the energy-saving air conditioning system is operated in the summer mode, and provide the chilled water in the third preset temperature range for the common air conditioning unit 800 and the constant temperature and humidity unit 900.

In an embodiment of the present example, the system further comprises:

the water tank 300 is placed in a room and subjected to heat preservation and freezing prevention treatment.

In an embodiment of the present example, the system further comprises:

the water replenishing module 120 is connected with the open cooling tower 100 and the closed cooling tower 200 through pipelines respectively, and the water replenishing module 120 is used for replenishing the water levels of the open cooling tower 100 and the closed cooling tower 200 to preset water levels based on a preset control method.

In an embodiment of the present example, in the heating module of the system:

the heating module is configured to exchange the municipal heat source provided by the municipal thermal module 600 by the second plate heat exchanger 700 to provide a heat source for the common air conditioning unit 800 of the air conditioning unit when the energy-saving air conditioning system is operated in the winter mode, so that the common air conditioning unit 800 provides heating air conditioning for a service area of the common air conditioning unit 800.

In the embodiment of the present example, in the air conditioning unit of the system, the constant temperature and humidity unit 900 further includes a fan, a cooling water coil, a compressor, and a chilled water coil:

the cooling water coil is used for receiving cooling water in a second preset temperature interval of the closed cooling tower 200, generating chilled water in a third preset temperature interval through a compressor based on the cooling water in the second preset temperature interval, and circulating the chilled water in the third preset temperature interval generated through the compressor in the cooling water coil;

the chilled water coil is used for receiving chilled water in a third preset temperature interval of the first plate heat exchanger 400 and the refrigerator 500, and circulating the chilled water in the third preset temperature interval in the chilled water coil;

the fan is used for circulating air in the constant temperature and humidity unit 900 so that the air exchanges heat with the cooling water coil pipe and the freezing water coil pipe, and further cooling air conditioning is provided for a service area of the constant temperature and humidity unit 900.

In an embodiment of the present example, in the air conditioning unit of the system, the constant temperature and humidity unit 900 further includes a water mixing module:

the water mixing module comprises a proportional control valve 901, a one-way valve 904 and a circulating pump 905, the water mixing module is connected with a cooling water pipe of the constant temperature and humidity unit 900, and the water mixing module is used for lifting the water temperature of the cooling chilled water provided by the first plate heat exchanger 400 to a second preset temperature range for the cooling water pipe of the constant temperature and humidity unit 900 by adjusting the opening of the proportional control valve 901 and the frequency of the circulating pump 905 through a preset control method when the water temperature of the cooling chilled water of the fifth preset temperature range provided by the first plate heat exchanger 400 is higher than the upper limit of the third preset temperature range and lower than the lower limit of the second preset temperature range when the energy-saving air conditioning system operates in the transition season mode.

In an embodiment of the present example, the system further comprises a first emergency mode:

when the energy-saving air conditioning system is operated in the winter mode, if the pipeline between the first plate heat exchanger 400 and the constant temperature and humidity unit 900 fails so as to be incapable of providing a cold source for the constant temperature and humidity unit 900, the valve between the first plate heat exchanger 400 and the constant temperature and humidity unit 900 is closed, the valve between the second plate heat exchanger 700 and the common air conditioning unit 800 is closed, the valve between the constant temperature and humidity unit 900 and the common air conditioning unit 800 is opened, and the number of the input common air conditioning units 800 is adjusted so that the common air conditioning unit 800 provides cooling water in a second preset temperature interval for the constant temperature and humidity unit 900.

In an embodiment of the present example, the system further comprises a second emergency mode:

when the energy-saving air conditioning system is operated in the summer mode, if the humidity of the service area of the constant temperature and humidity unit 900 exceeds a preset value, and the opening of the chilled water coil of the constant temperature and humidity unit 900 and the power of the electric heating module are both at maximum, the municipal heat source provided by the municipal heat module 600 is exchanged by the second plate heat exchanger 700 to provide a heat source for the constant temperature and humidity unit 900 of the air conditioning unit, so as to provide a heat source for the dehumidification function of the constant temperature and humidity unit 900.

Embodiment two:

in this exemplary embodiment, the first preset temperature interval is 5-10 degrees celsius, the second preset temperature interval is 30-35 degrees celsius, the third preset temperature interval is 7-12 degrees celsius, the fourth preset temperature interval is 5-33 degrees celsius, and the fifth preset temperature interval is 7-35 degrees celsius.

In the embodiment of the present example, as shown in fig. 2, when the energy-saving air conditioning system is operated in the summer mode, the valve 151, the valve 152, the valve 581, the valve 582, the valve 583, the valve 584, the valve 891, and the valve 892 are opened, the open cooling tower 100 provides the normal air conditioning unit 800 and the constant temperature and humidity unit 900 with chilled water in a third preset temperature range through the chiller 500, wherein the constant temperature and humidity unit 900 provides the constant temperature and humidity unit 900 with a cold source through a chilled water coil.

Further, as shown in fig. 3, when the energy-saving air conditioning system is operated in the summer mode, the closed cooling tower 200 provides cooling water in a second preset temperature interval for the constant temperature and humidity unit 900 by opening the valve 291, the valve 292, the valve 902 and the valve 906, wherein the constant temperature and humidity unit 900 provides a cold source for the constant temperature and humidity unit 900 through a cooling water coil.

Further, when the energy-saving air conditioning system is operated in the summer mode, if the service area of the constant temperature and humidity unit 900 is preset to be at a temperature of 22 ℃, the enabling condition of the chilled water coil of the constant temperature and humidity unit 900 is set to be 21-23 ℃, the enabling condition of the chilled water coil of the constant temperature and humidity unit 900 is set to be 20-24 ℃, the chilled water coil is closed when the chilled water coil is enabled, by the above arrangement, the chilled water in the chilled water coil which is more energy-saving can be preferentially used by the constant temperature and humidity unit 900 in a constant temperature interval, when the temperature fluctuation is large, the chilled water in the chilled water coil cannot be stably controlled by using the chilled water in the chilled water coil, the temperature is controlled by the compressor of the constant temperature and humidity unit 900, and when the temperature is stably controlled to be within the preset time period of 21-23 ℃, the chilled water coil is closed.

In the embodiment of the present example, as shown in fig. 4, when the energy-saving air conditioning system is operated in the transitional season mode, the valve 131, the valve 132, the valve 491, the valve 492, the valve 893, the valve 894 are opened, the water mixing module is enabled, the proportional control valve 901, the valve 903, the one-way valve 904 and the circulation pump 905 are opened, and the open cooling tower 100 provides the cooling chilled water in the fifth preset temperature interval for the constant temperature and humidity unit 900 through the water tank 300 and the first plate heat exchanger 400.

Further, as shown in fig. 5, when the energy-saving air conditioning system is operated in the transition season mode, when the water temperature of the cooling chilled water is within 7-12 ℃ of the third preset temperature interval, the valve 893 and the valve 894 are opened, the valve 902 and the valve 906 of the water mixing module and the bypass are closed, so that the cooling chilled water provides a cold source for the constant temperature and humidity unit 900 through the chilled water coil, and when the energy-saving air conditioning system is operated in the transition season mode, when the water temperature of the cooling chilled water is within 7-12 ℃ of the third preset temperature interval, the open cooling tower 100 and the closed cooling tower 200 directly provide a chilled water cold source of 7-12 ℃ of the third preset temperature interval for the constant temperature and humidity unit 900 through the water tank 300 and the first plate heat exchanger 400, which is equivalent to directly using the cold source in the natural environment, and does not need to refrigerate through a large amount of electric energy, thereby having a high energy-saving effect.

Further, as shown in fig. 6, when the temperature of the cooling chilled water is higher than the upper limit 12 ℃ of the third preset temperature interval, the valve 893 and the valve 894 are closed, the water mixing module is enabled, the bypass valve 902 and the valve 906 of the water mixing module are closed, so that the cooling chilled water provides a cold source for the constant temperature and humidity unit 900 through the cooling water coil and the water mixing system, wherein when the temperature of the cooling chilled water is lower than the lower limit 30 ℃ of the second preset temperature interval, the cooling chilled water can generate liquid impact on the constant temperature and humidity unit 900 to cause damage to the compressor, so that the water mixing module has the function of circulating the cooling chilled water in the cooling water coil between the cooling water coil and the water mixing module, and adjusting the opening of the proportional control valve 901 and the frequency of the circulating pump 905 by a preset control method, so that the temperature of the cooling chilled water is raised to 30-35 ℃ of the second preset temperature interval, so that the constant temperature and humidity unit 900 is normally operated through the cooling water coil.

Further, as shown in fig. 7, when the energy-saving air conditioning system is operated in the transitional season mode, the closed cooling tower 200 provides cooling water in a second preset temperature interval for the constant temperature and humidity unit 900 as a standby cold source, and when the open cooling tower 100, the water tank 300 and the first plate heat exchanger 400 fail or maintenance and shutdown are required, the valves 291 and 292 are opened, the valves 491 and 492 are closed, the water mixing system is closed, the bypass valves 902 and 906 of the water mixing module are opened, and the cold source is provided for the constant temperature and humidity unit 900 through the cooling water coil.

In the embodiment of the present example, as shown in fig. 8, when the energy-saving air conditioning system is operated in the winter mode, the valve 131, the valve 132, the valve 231, the valve 232, the valve 491, the valve 492, the valve 893, and the valve 894 are opened, and the open cooling tower 100 and the closed cooling tower 200 provide a cold source of chilled water in a third preset temperature range for the constant temperature and humidity unit 900 through the water tank 300 and the first plate heat exchanger 400; the valves 781, 782, 583 and 584 are opened, and the municipal thermal module 600 provides a heat source for the common air conditioning unit 800 through the second plate heat exchanger 700. Because the energy-saving air conditioning system is operated in the winter mode, the open cooling tower 100 and the closed cooling tower 200 directly provide the third chilled water cooling source with the preset temperature range of 7-12 ℃ for the constant temperature and humidity unit 900 through the water tank 300 and the first plate heat exchanger 400, which is equivalent to directly using the cooling source in the natural environment, without refrigerating through a large amount of electric energy, and has a higher energy-saving effect. In practical application, the area to be served by the constant temperature and humidity unit 900 generally includes a data center and a library, the data center is a constant heat source, no heat is needed in winter, the library is a closed environment, the heat loss is less, and a large amount of humidification is needed in winter, so that a heat source can be provided for the library during humidification, and meanwhile, an electric heating heat source can be adopted as a supplementary heat source, so that the library meets the constant temperature and humidity conditions.

In the embodiment of the present example, as shown in fig. 9, when the energy-saving air conditioning system is operated in the winter mode, in practical application, because the single-line pipeline 1000 area between the refrigeration module and the air conditioning unit is long, single-point pipeline failure easily occurs and chilled water cannot be provided, at this time, in order to ensure the constant temperature and humidity environment of the area served by the constant temperature and humidity unit 900, the first emergency mode operation is started, the valves 891, 892, 893, 894 and the bypass valve 902 of the water mixing module and the circulation pump 905 are opened, and since there are many common air conditioning units between the common air conditioning unit 800 and the common air conditioning unit 899, the common air conditioning unit is used as a radiator by adjusting the number of the common air conditioning units put into, so that the common air conditioning unit provides the cooling water of the second preset temperature interval for the constant temperature and humidity unit 900.

In this exemplary embodiment, as shown in fig. 10, when the energy-saving air conditioning system is operated in the summer mode, in an extreme environment of high temperature and high humidity, the main task of the area served by the constant temperature and humidity unit 900 is dehumidification, and the key point of the dehumidification function is that after passing through the refrigeration function of the constant temperature and humidity unit 900, the dehumidified air needs to be heated to the set temperature range by electric heating, and in practical application, since the electric heating power is generally not configured with the refrigeration capacity in the air conditioning design in equal proportion, the dehumidification function of the constant temperature and humidity unit 900 cannot achieve the expected effect due to the smaller electric heating power in the extreme environment. For this purpose, the second emergency mode operation may be started, the valves 291 and 292 are opened, the valves 491 and 492 are closed, the water mixing system is closed, the by-pass valves 902 and 906 of the water mixing module are opened, and the cooling water coil is used to provide a cold source for the constant temperature and humidity unit 900; opening valve 781, valve 782, valve 583, valve 584, valve 891, valve 892, municipal thermal module 600 passes through second plate heat exchanger 700 and the chilled water coil of constant temperature and humidity unit 900 is for constant temperature and humidity unit 900 provides the heat source, and at this moment, constant temperature and humidity unit 900 electrical heating and circulating hot water's chilled water coil are opened simultaneously, can satisfy constant temperature and humidity unit 900's dehumidification requirement. When the second emergency mode is started, the municipal thermal module can provide hot water of domestic water all the year round except for providing a heat source for heating in winter, so when the energy-saving air conditioning system is operated in the summer mode, the municipal thermal module has a heat supply function, and meanwhile, when the second emergency mode is started, the common air conditioning unit 800 cannot acquire a cold source, so that the second emergency mode is emergency use.

In the embodiment of the present example, since the energy-saving air conditioning system uses chilled water with higher energy efficiency in summer and uses natural cooling as the cold source in winter, compared with the prior art, the energy-saving air conditioning system has higher energy-saving effect, and the duration of the operation of the compressor of the constant temperature and humidity unit 900 is very short in the whole year, the equipment loss degree is lower, and the economic use level is improved; different cold sources of the refrigerating module are combined with different uses of the air conditioning unit, so that double backups of the cold sources and the unit are realized, and the running stability of the system is improved.

It should be noted that although several modules or units of an energy efficient air conditioning system are mentioned in the above detailed description, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit in accordance with embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.

Furthermore, the above-described drawings are only schematic illustrations of processes included in the method according to the exemplary embodiment of the present application, and are not intended to be limiting. It will be readily appreciated that the processes shown in the above figures do not indicate or limit the temporal order of these processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, for example, among a plurality of modules.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An energy-saving air conditioning system, which is characterized by comprising a refrigeration module, a heating module and an air conditioning unit, wherein:

2. The system of claim 1, wherein in the refrigeration module of the system:

3. The system of claim 2, wherein the system further comprises:

4. The system of claim 2, wherein the system further comprises:

5. The system of claim 1, wherein in the heating module of the system:

6. The system of claim 1, wherein in the air conditioning unit of the system, the constant temperature and humidity unit further comprises a fan, a cooling water coil, a compressor, a chilled water coil:

7. The system of claim 6, wherein in the air conditioning unit of the system, the constant temperature and humidity unit further comprises a water mixing module:

8. The system of claim 1, wherein the system further comprises a first emergency mode:

9. The system of claim 1, wherein the system further comprises a second emergency mode: