Energy-saving air conditioning system

Abstract

The present disclosure relates to an energy-saving air conditioning system. Wherein the energy-saving air conditioning system comprises a refrigeration module, a heating module and an air conditioning unit. The energy-saving air conditioning system can provide a cold source for the constant temperature and humidity unit directly through the high energy efficiency freezer in summer mode operation, and can directly generate chilled water for the constant temperature and humidity unit by the user outdoor natural cold source in the transition season and winter operation, which achieves a higher energy-saving effect. At the same time, the system contains emergency operation mode under the condition of extreme high temperature and high humidity in summer and the condition of single-point pipeline failure in winter, realizes double backup operation from the cold source to the unit, and makes the energy-saving air conditioning system have higher operation stability. Therefore, the energy-saving air conditioning system of the present disclosure has a wider application scenario.

Description

Technical Field

[0001] This disclosure relates to the field of heating, ventilation and air conditioning, and more specifically, to an energy-saving air conditioning system. Background Technology

[0002] In large buildings, different central air conditioning units are often required for different areas based on their functions. For example, ordinary air conditioning units are used for general office spaces, while constant temperature and humidity units are required for data centers and warehouses such as libraries. These constant temperature and humidity units need to operate continuously throughout the year.

[0003] In existing technologies, constant temperature and humidity units rely on a single cooling source and cannot share a cooling source with ordinary air conditioning units. To adapt to winter scenarios, they are often equipped with only a cooling water source and a local compressor. Such systems have a single cooling source, poor energy efficiency, and high operating costs. Furthermore, due to the lack of a backup cooling source, the system's operational stability is low, and a shutdown can have a significant impact on data centers or warehouses such as libraries.

[0004] Therefore, one or more methods are needed to solve the above problems.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this disclosure is to provide an energy-saving air conditioning system that overcomes, at least to some extent, one or more problems caused by the limitations and defects of related technologies.

[0007] According to one aspect of this disclosure, an energy-saving air conditioning system is provided, comprising a refrigeration module, a heating module, and an air conditioning unit, wherein:

[0008] The refrigeration module includes an open cooling tower, a closed cooling tower, a water tank, a first plate heat exchanger, and a chiller. The refrigeration module is used to provide a cold source for the air conditioning unit when the energy-saving air conditioning system is running in summer mode, transitional season mode, and winter mode, respectively, through the preset combination start-stop control of the open cooling tower, closed cooling tower, water tank, first plate heat exchanger, chiller, and valves in the refrigeration module.

[0009] The heating module includes a municipal heating module and a second plate heat exchanger. The heating module is used to provide a heat source for the air conditioning unit when the energy-saving air conditioning system is running in winter mode.

[0010] The air conditioning unit includes a regular air conditioning unit and a constant temperature and humidity unit. The regular air conditioning unit is used when the energy-saving air conditioning system is running in summer mode, receiving the cold source from the refrigeration module to provide cooling air conditioning for the service area of ​​the regular air conditioning unit. The regular air conditioning unit is used when the energy-saving air conditioning system is running in winter mode, receiving the heat source from the heating module to provide heating air conditioning for the service area of ​​the regular air conditioning unit. The constant temperature and humidity unit is used when the energy-saving air conditioning system is running in summer mode, transitional season mode, and winter mode, receiving the cold source from the refrigeration module to provide cooling air conditioning for the service area of ​​the constant temperature and humidity unit.

[0011] In one exemplary embodiment of this disclosure, the cooling module of the system includes:

[0012] The open cooling tower is connected to the water tank and the chiller via pipes. The open cooling tower provides chilled water within a first preset temperature range to the water tank during winter operation of the energy-saving air conditioning system. It also provides chilled water within a fourth preset temperature range to the water tank during transitional season operation of the energy-saving air conditioning system. Furthermore, it provides cooling water within a second preset temperature range to the chiller during summer operation of the energy-saving air conditioning system.

[0013] The closed-loop cooling tower is connected to the water tank and the constant temperature and humidity unit via pipes. The closed-loop cooling tower is used to provide chilled water within a first preset temperature range to the water tank when the energy-saving air conditioning system is running in winter mode. The closed-loop cooling tower is also used to provide cooling water within a second preset temperature range to the constant temperature and humidity unit when the energy-saving air conditioning system is running in transition season mode and summer mode.

[0014] The first plate heat exchanger is connected to the water tank and the constant temperature and humidity unit via pipes. When the energy-saving air conditioning system operates in winter mode, the first plate heat exchanger exchanges heat between the chilled water in the water tank at a first preset temperature range and the chilled water between the first plate heat exchanger and the constant temperature and humidity unit, thereby regulating and controlling the temperature of the chilled water between the first plate heat exchanger and the constant temperature and humidity unit within a third preset temperature range. The first plate heat exchanger is also used when the energy-saving air conditioning system operates in transitional season mode, to exchange heat between the cooling chilled water in the water tank at a fourth preset temperature range and the cooling chilled water between the first plate heat exchanger and the constant temperature and humidity unit, thereby regulating and controlling the temperature of the cooling chilled water between the first plate heat exchanger and the constant temperature and humidity unit within a fifth preset temperature range.

[0015] The chiller is connected to the ordinary air conditioning unit and the constant temperature and humidity unit through pipes. The chiller is used 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 when the energy-saving air conditioning system is running in summer mode, and to provide the chilled water in the third preset temperature range to the ordinary air conditioning unit and the constant temperature and humidity unit.

[0016] In one exemplary embodiment of this disclosure, the system further includes:

[0017] The water tank is placed indoors and insulated to prevent freezing.

[0018] In one exemplary embodiment of this disclosure, the system further includes:

[0019] The water replenishment module is connected to the open cooling tower and the closed cooling tower respectively through pipes. The water replenishment module is used to replenish the water level of the open cooling tower and the closed cooling tower to a preset water level based on a preset control method.

[0020] In one exemplary embodiment of this disclosure, the heating module of the system includes:

[0021] The heating module is used when the energy-saving air conditioning system is running in winter mode. It exchanges the municipal heat source provided by the municipal heating module with the ordinary air conditioning unit through the second plate heat exchanger, so that the ordinary air conditioning unit can provide heating air conditioning for the service area of ​​the ordinary air conditioning unit.

[0022] In one exemplary embodiment of this disclosure, the air conditioning unit of the system further includes a fan, a cooling water coil, a compressor, and a chilled water coil.

[0023] The cooling water coil is used to receive cooling water in the second preset temperature range of the closed cooling tower, and to generate chilled water in the third preset temperature range through a compressor based on the cooling water in the second preset temperature range, and to circulate the chilled water in the third preset temperature range generated by the compressor in the cooling water coil.

[0024] The chilled water coil is used to receive chilled water from the first plate heat exchanger and the chiller in a third preset temperature range, and to circulate the chilled water in the third preset temperature range in the cooling water coil.

[0025] The fan is used to circulate the air inside the constant temperature and humidity unit so that the air can exchange heat with the cooling water coil and the chilled water coil, thereby providing cooling air conditioning for the service area of ​​the constant temperature and humidity unit.

[0026] In one exemplary embodiment of this disclosure, the air conditioning unit of the system further includes a mixing module:

[0027] The mixing module includes a proportional regulating valve, a one-way valve, and a circulating pump. The mixing module is connected to the cooling water coil of the constant temperature and humidity unit. When the energy-saving air conditioning system is running in transitional season mode, and the temperature of the chilled water in the fifth preset temperature range provided by the first plate heat exchanger is higher than the upper limit of the third preset temperature range but lower than the lower limit of the second preset temperature range, the mixing module adjusts the opening of the proportional regulating valve and the frequency of the circulating pump through a preset control method. This causes the chilled water in the cooling water coil to circulate between the cooling water coil and the mixing module, thereby raising the temperature of the chilled water provided by the first plate heat exchanger to the second preset temperature range for use by the cooling water coil of the constant temperature and humidity unit.

[0028] In one exemplary embodiment of this disclosure, the system further includes a first emergency mode:

[0029] When the energy-saving air conditioning system is running in winter mode, if the pipeline between the first plate heat exchanger and the constant temperature and humidity unit fails and cannot provide a cooling source to 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 ordinary air conditioning unit is closed, and the valve between the constant temperature and humidity unit and the ordinary air conditioning unit is opened. By adjusting the number of ordinary air conditioning units put into operation, the ordinary air conditioning units can provide cooling water within a second preset temperature range to the constant temperature and humidity unit.

[0030] In one exemplary embodiment of this disclosure, the system further includes a second emergency mode:

[0031] When the energy-saving air conditioning system is running in summer mode, if the humidity in the service area of ​​the constant temperature and humidity unit exceeds the preset value, and the opening of the chilled water coil and the power of the electric heating module of the constant temperature and humidity unit have reached their maximum values, the municipal heat source provided by the municipal heating module will be 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.

[0032] An exemplary embodiment of this disclosure provides an energy-saving air conditioning system, comprising a refrigeration module, a heating module, and an air conditioning unit. In summer mode, the system directly provides a cooling source to the constant temperature and humidity unit using a high-efficiency chiller. During transitional seasons and winter operation, it can directly utilize outdoor natural cold sources to generate chilled water to provide a cooling source for the constant temperature and humidity unit, achieving significant energy savings. Furthermore, the system includes emergency operation modes for extreme high temperature and humidity conditions in summer and for single-point pipeline failures in winter, realizing dual backup operation from the cooling source to the unit. This ensures high operational stability of the energy-saving air conditioning system. Therefore, the energy-saving air conditioning system of this disclosure has a wide range of application scenarios.

[0033] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0034] The above and other features and advantages of this disclosure will become more apparent from the detailed description of exemplary embodiments thereof with reference to the accompanying drawings.

[0035] Figure 1 A structural block diagram of an energy-saving air conditioning system according to an exemplary embodiment of the present disclosure is shown;

[0036] Figure 2 A structural block diagram of an energy-saving air conditioning system operating in summer mode according to an exemplary embodiment of the present disclosure is shown.

[0037] Figure 3 Another structural block diagram of an energy-saving air conditioning system operating in summer mode according to an exemplary embodiment of the present disclosure is shown;

[0038] Figure 4 A block diagram of the operating structure of an energy-saving air conditioning system in transitional season mode according to an exemplary embodiment of the present disclosure is shown.

[0039] Figure 5 Another structural block diagram of an energy-saving air conditioning system operating in transitional season mode according to an exemplary embodiment of the present disclosure is shown;

[0040] Figure 6 Another structural block diagram of an energy-saving air conditioning system operating in transitional season mode according to an exemplary embodiment of the present disclosure is shown;

[0041] Figure 7 Another structural block diagram of an energy-saving air conditioning system operating in transitional season mode according to an exemplary embodiment of the present disclosure is shown;

[0042] Figure 8A block diagram of the structure of an energy-saving air conditioning system in winter mode operation according to an exemplary embodiment of the present disclosure is shown.

[0043] Figure 9 A block diagram of the first emergency mode operation structure of an energy-saving air conditioning system according to an exemplary embodiment of the present disclosure is shown.

[0044] Figure 10 A block diagram illustrating the second emergency mode operation structure of an energy-saving air conditioning system according to an exemplary embodiment of the present disclosure is shown. Detailed Implementation

[0045] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0046] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details described, or other methods, components, materials, apparatuses, steps, etc., can be employed. In other instances, well-known structures, methods, apparatuses, implementations, materials, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0047] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, or in one or more software-hardened modules, or in different network and / or processor devices and / or microcontroller devices.

[0048] In this example embodiment, an energy-saving air conditioning system is first provided; Reference Figure 1 As shown, this energy-saving air conditioning system includes a refrigeration module, a heating module, and an air conditioning unit, wherein:

[0049] The refrigeration module includes an open cooling tower 100, a closed cooling tower 200, a water tank 300, a first plate heat exchanger 400, and a chiller 500. The refrigeration module is used to provide a cold source for the air conditioning unit when the energy-saving air conditioning system is running in summer mode, transitional season mode, and winter mode, respectively. It provides a cold source for the air conditioning unit through preset combination start-stop control of the open cooling tower 100, closed cooling tower 200, water tank 300, first plate heat exchanger 400, chiller 500, and valves in the refrigeration module.

[0050] The heating module includes a municipal heating module 600 and a second plate heat exchanger 700. The heating module is used to provide a heat source for the air conditioning unit when the energy-saving air conditioning system is running in winter mode.

[0051] The air conditioning unit includes a general-purpose air conditioning unit 800 and a constant temperature and humidity unit 900. The general-purpose air conditioning unit 800 is used in the summer mode of the energy-saving air conditioning system to receive the cold source from the refrigeration module and provide cooling air conditioning for the service area of ​​the general-purpose air conditioning unit 800. The general-purpose air conditioning unit 800 is used in the winter mode of the energy-saving air conditioning system to receive the heat source from the heating module and provide heating air conditioning for the service area of ​​the general-purpose air conditioning unit 800. The constant temperature and humidity unit 900 is used in the summer mode, transitional season mode, and winter mode of the energy-saving air conditioning system to receive the cold source from the refrigeration module and provide cooling air conditioning for the service area of ​​the constant temperature and humidity unit 900.

[0052] An exemplary embodiment of this disclosure provides an energy-saving air conditioning system, comprising a refrigeration module, a heating module, and an air conditioning unit. In summer mode, the system directly provides a cooling source to the constant temperature and humidity unit using a high-efficiency chiller. During transitional seasons and winter operation, it can directly utilize outdoor natural cold sources to generate chilled water to provide a cooling source for the constant temperature and humidity unit, achieving significant energy savings. Furthermore, the system includes emergency operation modes for extreme high temperature and humidity conditions in summer and for single-point pipeline failures in winter, realizing dual backup operation from the cooling source to the unit. This ensures high operational stability of the energy-saving air conditioning system. Therefore, the energy-saving air conditioning system of this disclosure has a wide range of application scenarios.

[0053] The following will provide a further description of an energy-saving air conditioning system in this example embodiment.

[0054] Example 1:

[0055] An energy-saving air conditioning system includes a refrigeration module, a heating module, and an air conditioning unit, wherein:

[0056] The refrigeration module includes an open cooling tower 100, a closed cooling tower 200, a water tank 300, a first plate heat exchanger 400, and a chiller 500. The refrigeration module is used to provide a cold source for the air conditioning unit when the energy-saving air conditioning system is running in summer mode, transitional season mode, and winter mode, respectively. It provides a cold source for the air conditioning unit through preset combination start-stop control of the open cooling tower 100, closed cooling tower 200, water tank 300, first plate heat exchanger 400, chiller 500, and valves in the refrigeration module.

[0057] The heating module includes a municipal heating module 600 and a second plate heat exchanger 700. The heating module is used to provide a heat source for the air conditioning unit when the energy-saving air conditioning system is running in winter mode.

[0058] The air conditioning unit includes a general-purpose air conditioning unit 800 and a constant temperature and humidity unit 900. The general-purpose air conditioning unit 800 is used in the summer mode of the energy-saving air conditioning system to receive the cold source from the refrigeration module and provide cooling air conditioning for the service area of ​​the general-purpose air conditioning unit 800. The general-purpose air conditioning unit 800 is used in the winter mode of the energy-saving air conditioning system to receive the heat source from the heating module and provide heating air conditioning for the service area of ​​the general-purpose air conditioning unit 800. The constant temperature and humidity unit 900 is used in the summer mode, transitional season mode, and winter mode of the energy-saving air conditioning system to receive the cold source from the refrigeration module and provide cooling air conditioning for the service area of ​​the constant temperature and humidity unit 900.

[0059] In this example embodiment, the cooling module of the system includes:

[0060] The open cooling tower 100 is connected to the water tank 300 and the chiller 500 via pipes. The open cooling tower 100 is used to provide chilled water within a first preset temperature range to the water tank 300 when the energy-saving air conditioning system is operating in winter mode; the open cooling tower 100 is used to provide chilled water within a fourth preset temperature range to the water tank 300 when the energy-saving air conditioning system is operating in transitional season mode; and the open cooling tower 100 is also used to provide chilled water within a second preset temperature range to the chiller 500 when the energy-saving air conditioning system is operating in summer mode.

[0061] The closed-circuit cooling tower 200 is connected to the water tank 300 and the constant temperature and humidity unit 900 via pipes. The closed-circuit cooling tower 200 is used to provide chilled water within a first preset temperature range to the water tank 300 when the energy-saving air conditioning system is running in winter mode. The closed-circuit cooling tower 200 is also used to provide cooling water within a second preset temperature range to the constant temperature and humidity unit 900 when the energy-saving air conditioning system is running in transitional season mode and summer mode.

[0062] The first plate heat exchanger 400 is connected to the water tank 300 and the constant temperature and humidity unit 900 via pipes. When the energy-saving air conditioning system operates in winter mode, the first plate heat exchanger 400 exchanges heat between the chilled water in the water tank 300 (within a first preset temperature range) and the chilled water between the first plate heat exchanger 400 and the constant temperature and humidity unit 900, thereby regulating and controlling the temperature of the chilled water between the first plate heat exchanger 400 and the constant temperature and humidity unit 900 within a third preset temperature range. The first plate heat exchanger 400 is also used when the energy-saving air conditioning system operates in transitional season mode, to exchange heat between the chilled water in the water tank 300 (within a fourth preset temperature range) and the chilled water between the first plate heat exchanger 400 and the constant temperature and humidity unit 900, thereby regulating and controlling the temperature of the chilled water between the first plate heat exchanger 400 and the constant temperature and humidity unit 900 within a fifth preset temperature range.

[0063] The chiller 500 is connected to the ordinary air conditioning unit 800 and the constant temperature and humidity unit 900 via pipes. The chiller 500 is used 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 running in summer mode, and to provide the chilled water in the third preset temperature range to the ordinary air conditioning unit 800 and the constant temperature and humidity unit 900.

[0064] In this example embodiment, the system further includes:

[0065] The water tank 300 is placed indoors and is insulated and protected from freezing.

[0066] In this example embodiment, the system further includes:

[0067] The water replenishment module 120 is connected to the open cooling tower 100 and the closed cooling tower 200 respectively through pipes. The water replenishment module 120 is used to replenish the water level of the open cooling tower 100 and the closed cooling tower 200 to a preset water level based on a preset control method.

[0068] In this example embodiment, the heating module of the system includes:

[0069] The heating module is used when the energy-saving air conditioning system is running in winter mode. It exchanges the municipal heat source provided by the municipal heating module 600 with the second plate heat exchanger 700 and then provides a heat source to the ordinary air conditioning unit 800 of the air conditioning unit, so that the ordinary air conditioning unit 800 provides heating air conditioning for the service area of ​​the ordinary air conditioning unit 800.

[0070] In this example embodiment, 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.

[0071] The cooling water coil is used to receive cooling water in the second preset temperature range of the closed cooling tower 200, and to generate chilled water in the third preset temperature range through a compressor based on the cooling water in the second preset temperature range, and to circulate the chilled water in the third preset temperature range generated by the compressor in the cooling water coil.

[0072] The chilled water coil is used to receive chilled water from the first plate heat exchanger 400 and the chiller 500 in a third preset temperature range, and to circulate the chilled water in the third preset temperature range in the cooling water coil.

[0073] The fan is used to circulate the air inside the constant temperature and humidity unit 900 so that the air can exchange heat with the cooling water coil and the chilled water coil, thereby providing cooling air conditioning for the service area of ​​the constant temperature and humidity unit 900.

[0074] In this example embodiment, the air conditioning unit of the system, the constant temperature and humidity unit 900 further includes a mixing module:

[0075] The mixing module includes a proportional regulating valve 901, a one-way valve 904, and a circulating pump 905. The mixing module is connected to the cooling water coil of the constant temperature and humidity unit 900. When the energy-saving air conditioning system is running in transitional season mode, and the temperature of the chilled water in 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 but lower than the lower limit of the second preset temperature range, the mixing module adjusts the opening of the proportional regulating valve 901 and the frequency of the circulating pump 905 through a preset control method. This causes the chilled water in the cooling water coil to circulate between the cooling water coil and the mixing module, thereby raising the temperature of the chilled water provided by the first plate heat exchanger 400 to the second preset temperature range for use by the cooling water coil of the constant temperature and humidity unit 900.

[0076] In this example embodiment, the system further includes a first emergency mode:

[0077] When the energy-saving air conditioning system is running in winter mode, if the pipeline between the first plate heat exchanger 400 and the constant temperature and humidity unit 900 fails and cannot provide a cooling source to 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 ordinary air conditioning unit 800 is closed, and the valve between the constant temperature and humidity unit 900 and the ordinary air conditioning unit 800 is opened. By adjusting the number of ordinary air conditioning units 800 in operation, the ordinary air conditioning units 800 can provide cooling water within a second preset temperature range to the constant temperature and humidity unit 900.

[0078] In this example embodiment, the system further includes a second emergency mode:

[0079] When the energy-saving air conditioning system is running in summer mode, if the humidity in the service area of ​​the constant temperature and humidity unit 900 exceeds the preset value, and the opening degree of the chilled water coil and the power of the electric heating module of the constant temperature and humidity unit 900 have reached their maximum values, the municipal heat source provided by the municipal heating module 600 will be exchanged through 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.

[0080] Example 2:

[0081] In this example embodiment, the first preset temperature range is 5-10 degrees Celsius, the second preset temperature range is 30-35 degrees Celsius, the third preset temperature range is 7-12 degrees Celsius, the fourth preset temperature range is 5-33 degrees Celsius, and the fifth preset temperature range is 7-35 degrees Celsius.

[0082] In the embodiments of this example, as Figure 2 As shown, when the energy-saving air conditioning system is running in summer mode, valves 151, 152, 581, 582, 583, 584, 891, and 892 are opened. The open cooling tower 100 provides chilled water within a third preset temperature range to the ordinary air conditioning unit 800 and the constant temperature and humidity unit 900 through the chiller 500. The constant temperature and humidity unit 900 is provided with a cold source through a chilled water coil.

[0083] Furthermore, such as Figure 3As shown, when the energy-saving air conditioning system is running in summer mode, the closed cooling tower 200 provides cooling water within a second preset temperature range to the constant temperature and humidity unit 900 by opening valves 291, 292, 902, and 906. The constant temperature and humidity unit 900 provides a cold source through a cooling water coil.

[0084] Furthermore, when the energy-saving air conditioning system is running in summer mode, if the preset temperature of the service area of ​​the constant temperature and humidity unit 900 is 22 degrees Celsius, the enabling condition of the chilled water coil of the constant temperature and humidity unit 900 is set to 21-23 degrees Celsius, and the enabling condition of the cooling water coil of the constant temperature and humidity unit 900 is set to 20-24 degrees Celsius. When the chilled water coil is enabled, the cooling water coil is turned off; when the cooling water coil is enabled, the chilled water coil is turned off. Through the above settings, the constant temperature and humidity unit 900 can preferentially use the more energy-efficient chilled water from the chilled water coil within a constant temperature range. When the temperature fluctuates significantly and the chilled water from the chilled water coil cannot be stably controlled, the cooling water from the cooling water coil is enabled, and the temperature is controlled by the compressor of the constant temperature and humidity unit 900 itself. When the temperature is stably controlled within the preset range of 21-23 degrees Celsius using the cooling water from the cooling water coil, the cooling water coil is turned off, and the chilled water coil is enabled.

[0085] In the embodiments of this example, as Figure 4 As shown, when the energy-saving air conditioning system is running in transitional season mode, valves 131, 132, 491, 492, 893, and 894 are opened, the mixing module is enabled, and proportional regulating valves 901, 903, check valve 904, and circulating pump 905 are opened. The open cooling tower 100 provides cooling chilled water within the fifth preset temperature range to the constant temperature and humidity unit 900 through the water tank 300 and the first plate heat exchanger 400.

[0086] Furthermore, such as Figure 5As shown, when the energy-saving air conditioning system operates in transitional season mode, and the temperature of the cooling chilled water is within the third preset temperature range of 7-12 degrees Celsius, valves 893 and 894 are opened, while the mixing module and bypass valves 902 and 906 are closed. This allows the cooling chilled water to provide a cold source to the constant temperature and humidity unit 900 through the chilled water coil. Since the energy-saving air conditioning system operates in transitional season mode, and the temperature of the cooling chilled water is within the third preset temperature range of 7-12 degrees Celsius, the open cooling tower 100 and the closed cooling tower 200 directly provide the constant temperature and humidity unit 900 with a chilled water cold source within the third preset temperature range of 7-12 degrees Celsius through the water tank 300 and the first plate heat exchanger 400. This is equivalent to directly using a cold source from the natural environment, without the need for a large amount of electrical energy for cooling, resulting in a high energy-saving effect.

[0087] Furthermore, such as Figure 6 As shown, when the temperature of the cooling chilled water is higher than the upper limit of the third preset temperature range by 12 degrees Celsius, valves 893 and 894 are closed, the mixing module is enabled, and the bypass valves 902 and 906 of the mixing module are closed, so that the cooling chilled water provides a cold source to the constant temperature and humidity unit 900 through the cooling water coil and the mixing system. When the temperature of the cooling chilled water is lower than the lower limit of the second preset temperature range by 30 degrees Celsius, the cooling chilled water will cause liquid slugging in the constant temperature and humidity unit 900, which will damage the compressor. Therefore, the function of the mixing module is to circulate the cooling chilled water in the cooling water coil between the cooling water coil and the mixing module. The opening of the proportional regulating valve 901 and the frequency of the circulating pump 905 are adjusted by a preset control method to raise the temperature of the cooling chilled water to 30-35 degrees Celsius in the second preset temperature range, so that the compressor can work normally to provide a cold source to the constant temperature and humidity unit 900 through the cooling water coil.

[0088] Furthermore, such as Figure 7 As shown, when the energy-saving air conditioning system is running in transitional season mode, the closed cooling tower 200 provides cooling water in the second preset temperature range as a backup cold source for the constant temperature and humidity unit 900. When the open cooling tower 100, water tank 300, or first plate heat exchanger 400 malfunctions or needs to be shut down for maintenance, valves 291 and 292 are opened, valves 491 and 492 are closed, the mixing system is shut down, and the bypass valves 902 and 906 of the mixing module are opened to provide a cold source for the constant temperature and humidity unit 900 through the cooling water coil.

[0089] In the embodiments of this example, as Figure 8As shown, when the energy-saving air conditioning system is running in winter mode, valves 131, 132, 231, 232, 491, 492, 893, and 894 are opened. The open cooling tower 100 and closed cooling tower 200 provide chilled water of the third preset temperature range to the constant temperature and humidity unit 900 through the water tank 300 and the first plate heat exchanger 400. Valves 781, 782, 583, and 584 are opened, and the municipal heating module 600 provides heat to the ordinary air conditioning unit 800 through the second plate heat exchanger 700. When the energy-saving air conditioning system operates in winter mode, the open cooling tower 100 and closed cooling tower 200 directly provide chilled water with a third preset temperature range of 7-12 degrees Celsius to the constant temperature and humidity unit 900 through the water tank 300 and the first plate heat exchanger 400. This is equivalent to directly using the cold source from the natural environment, eliminating the need for large amounts of electricity for cooling and resulting in high energy savings. It should be noted that in practical applications, areas requiring the constant temperature and humidity unit 900 typically include data centers and libraries. Data centers are constant heat sources and do not require heating in winter. Libraries, being enclosed environments, experience less heat loss and require significant humidification in winter. Humidification can provide a heat source for the library, and electric heating can be used as a supplementary heat source to ensure the library meets constant temperature and humidity conditions.

[0090] In the embodiments of this example, as Figure 9 As shown, when the energy-saving air conditioning system is running in winter mode, in practical applications, due to the long area of ​​the single-line pipeline 1000 between the refrigeration module and the air conditioning unit, single-point pipeline failures are prone to occur, resulting in the inability to provide chilled water. 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 is activated, opening valves 891, 892, 893, 894, the bypass valve 902 of the mixing module, and the circulation pump 905. Since there are many ordinary air conditioning units between the ordinary air conditioning unit 800 and the ordinary air conditioning unit 899, by adjusting the number of ordinary air conditioning units put into operation, the ordinary air conditioning units are used as radiators, so that the ordinary air conditioning units provide cooling water for the constant temperature and humidity unit 900 within the second preset temperature range.

[0091] In the embodiments of this example, as Figure 10As shown, when the energy-saving air conditioning system is running in summer mode, in extreme environments of high temperature and high humidity, the main task of the area served by the constant temperature and humidity unit 900 is dehumidification. The key point of the dehumidification function is that after the cooling function of the constant temperature and humidity unit 900, the dehumidified air needs to be heated to the set temperature range by electric heating. However, in actual applications, since the electric heating power is generally not configured proportionally to the cooling capacity in air conditioning design, the dehumidification function of the constant temperature and humidity unit 900 cannot achieve the expected effect in extreme environments due to the small electric heating power. Therefore, the second emergency mode can be activated. Valves 291 and 292 are opened, and valves 491 and 492 are closed to shut down the mixing system. The bypass valves 902 and 906 of the mixing module are opened to provide a cooling source to the constant temperature and humidity unit 900 via the cooling water coil. Valves 781, 782, 583, 584, 891, and 892 are opened, and the municipal heating module 600 provides a heat source to the constant temperature and humidity unit 900 via the second plate heat exchanger 700 and the chilled water coil of the constant temperature and humidity unit 900. At this time, the electric heating and circulating hot water chilled water coils of the constant temperature and humidity unit 900 are simultaneously activated, which can meet the dehumidification requirements of the constant temperature and humidity unit 900. It should be noted that when the second emergency mode is activated, the municipal heating module can provide heating function when the energy-saving air conditioning system is running in summer mode, since it can provide hot water for domestic use throughout the year in addition to providing heat for heating in winter. At the same time, since the ordinary air conditioning unit 800 cannot obtain a cold source when the second emergency mode is activated, the second emergency mode is for emergency use.

[0092] In this example embodiment, since the energy-saving air conditioning system uses highly energy-efficient chilled water in summer and natural cooling as the cold source in winter, it achieves a higher energy-saving effect compared with the prior art. In addition, the compressor of the constant temperature and humidity unit 900 is required to work for a very short period of time throughout the year, resulting in low equipment wear and tear and improving the economic efficiency. Different cold sources of the refrigeration module, through different combinations with the air conditioning unit, achieve dual backup of the cold source and the unit, improving the operational stability of the system.

[0093] It should be noted that although several modules or units of an energy-saving air conditioning system have been mentioned in the detailed description above, this division is not mandatory. In fact, according to embodiments of this disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0094] Furthermore, the above figures are merely illustrative of the processes included in the method according to exemplary embodiments of the present invention, and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Additionally, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0095] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

[0096] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An energy saving air conditioning system, characterized by, The system comprises a refrigeration module, a heating module, and 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 to provide a cold source for the air conditioning unit by starting and stopping control of a preset combination of the open cooling tower, the closed cooling tower, the water tank, the first plate heat exchanger, the refrigerator, and a valve when the energy-saving air conditioning system is operated in a summer mode, a transition season mode, and a winter mode, respectively; the open cooling tower is connected to the water tank and the refrigerator through pipelines, and is used to provide refrigerated water in a first preset temperature interval for the water tank when the energy-saving air conditioning system is operated in the winter mode; the open cooling tower is also used to provide cooling refrigerated water in a fourth preset temperature interval for the water tank when the energy-saving air conditioning system is operated in the transition season mode; the open cooling tower is further used to provide cooling water in a second preset temperature interval for the refrigerator when the energy-saving air conditioning system is operated in the summer mode; the closed cooling tower is connected to the water tank and the constant temperature and humidity unit through pipelines, and is used to provide refrigerated water in the first preset temperature interval for the water tank when the energy-saving air conditioning system is operated in the winter mode; the closed cooling tower is also used to provide cooling water in the second preset temperature interval for the constant temperature and humidity unit when the energy-saving air conditioning system is operated in the transition season mode and the summer mode; the first plate heat exchanger is connected to the water tank and the constant temperature and humidity unit through pipelines, and is used to exchange heat between the refrigerated water in the first preset temperature interval in the water tank and refrigerated water between the first plate heat exchanger and the constant temperature and humidity unit, and to adjust and control the temperature of the refrigerated water between the first plate heat exchanger and the constant temperature and humidity unit to be in a third preset temperature interval when the energy-saving air conditioning system is operated in the winter mode; the first plate heat exchanger is also used to exchange heat between the cooling refrigerated water in the fourth preset temperature interval in the water tank and cooling refrigerated water between the first plate heat exchanger and the constant temperature and humidity unit, and to adjust and control the temperature of the cooling refrigerated water between the first plate heat exchanger and the constant temperature and humidity unit to be in a fifth preset temperature interval when the energy-saving air conditioning system is operated in the transition season mode; the refrigerator is connected to the ordinary air conditioning unit and the constant temperature and humidity unit through pipelines, and is used to generate refrigerated water in the third preset temperature interval based on the cooling water in the second preset temperature interval provided by the open cooling tower, and to provide the refrigerated water in the third preset temperature interval for the ordinary air conditioning unit and the constant temperature and humidity unit when the energy-saving air conditioning system is operated in the summer mode; The heating module comprises a municipal heat module and a second plate heat exchanger, and is used to provide a heat source for the air conditioning unit when the energy-saving air conditioning system is operated in the winter mode. The air conditioning unit includes a general air conditioning unit and a constant temperature and humidity unit, the general air conditioning unit is used for receiving the cold source of the refrigeration module to provide refrigeration air conditioning for the service area of the general air conditioning unit when the energy-saving air conditioning system operates in the summer mode, and the general air conditioning unit is used for receiving the heat source of the heating module to provide heating air conditioning for the service area of the general air conditioning unit when the energy-saving air conditioning system operates in the winter mode, and the constant temperature and humidity unit is used for receiving the cold source of the refrigeration module to provide refrigeration air conditioning for the service area of the constant temperature and humidity unit when the energy-saving air conditioning system operates in the summer mode, the transition season mode or the winter mode.

2. The system of claim 1, wherein, The system further comprises: The water tank is placed indoors and is subjected to heat preservation and anti-freezing treatment.

3. The system of claim 1, wherein, The system further comprises: The water supplement module is connected with the open cooling tower and the closed cooling tower through pipelines, and is used for supplementing the water level of the open cooling tower and the closed cooling tower to a preset water level based on a preset control method.

4. The system of claim 1, wherein, In the heating module of the system: The heating module is used for providing the general air conditioning unit with the heat source exchanged by the second plate heat exchanger from the municipal heat source provided by the municipal heat supply module, so that the general air conditioning unit provides heating air conditioning for the service area of the general air conditioning unit when the energy-saving air conditioning system operates in the winter mode.

5. 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 and a refrigerated water coil: The cooling water coil is used for receiving the cooling water in the second preset temperature range of the closed cooling tower, generating refrigerated water in a third preset temperature range based on the cooling water in the second preset temperature range through the compressor, and circulating the refrigerated water in the third preset temperature range generated through the compressor in the cooling water coil; The refrigerated water coil is used for receiving the refrigerated water in the third preset temperature range of the first plate heat exchanger and the refrigerator, and circulating the refrigerated water in the third preset temperature range in the cooling water coil; The fan is used for circulating the air in the constant temperature and humidity unit to exchange heat between the air and the cooling water coil and the refrigerated water coil, thereby providing refrigeration air conditioning for the service area of the constant temperature and humidity unit.

6. The system of claim 5, wherein, In the air conditioning unit of the system, the constant temperature and humidity unit further comprises a water mixing module: The water mixing module comprises a proportional regulating valve, a one-way valve and a circulating pump, and is connected with the cooling water coil of the constant temperature and humidity unit, and is used to adjust the opening of the proportional regulating valve and the frequency of the circulating pump by a preset control method when the water temperature of the cooling chilled water in the fifth preset temperature range provided by the first plate heat exchanger 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, so that the cooling chilled water in the cooling water coil is circulated between the cooling water coil and the water mixing module, and the water temperature of the cooling chilled water provided by the first plate heat exchanger is raised to the second preset temperature range for the cooling water coil of the constant temperature and humidity unit.

7. The system of claim 1, wherein, The system further comprises a first emergency mode: When the energy-saving air conditioning system operates in the winter mode, if the pipeline between the first plate heat exchanger and the constant temperature and humidity unit fails to provide a cooling 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 ordinary air conditioning unit is closed, the valve between the constant temperature and humidity unit and the ordinary air conditioning unit is opened, and the number of the ordinary air conditioning units is adjusted to make the ordinary air conditioning units provide cooling water of the second preset temperature range for the constant temperature and humidity unit.

8. The system of claim 1, wherein, The system further comprises a second emergency mode: When the energy-saving air conditioning system operates in the summer mode, if the humidity of the service area of the constant temperature and humidity unit exceeds a preset value, and the opening of the chilled water coil of the constant temperature and humidity unit and the power of the electric heating module have reached the maximum values, the municipal heat source provided by the municipal heat module is exchanged by 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.

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