Control method and device of variable air volume air conditioning system with cold and heat complementary module

Abstract

The application discloses a control method and device of a variable air volume air conditioning system with a cold-heat complementary module, wherein the variable air volume air conditioning system comprises a control module, a cold-heat complementary module, a variable air volume terminal and a variable air volume air conditioning unit; the cold-heat complementary module comprises a temperature detector and a cross-flow fan; the temperature detector and the cross-flow fan are connected with the control module, and the control module is connected with the variable air volume air conditioning unit and the variable air volume terminal. Through implementation of the embodiment of the application, the cold-heat complementary air circulation treatment of an air conditioning area is realized by using the cold-heat complementary module, the supply air temperature and the supply air volume are determined according to the indoor demand after complementation, the variable air volume air conditioning unit and the variable air volume terminal are used to supply as needed to start operation, the cold-heat offset phenomenon is reduced, and the energy utilization rate is improved.

Description

Technical Field

[0001] This invention relates to the field of variable air volume (VAV) air conditioning systems, and more particularly to a control method and apparatus for a VAV air conditioning system with a cooling and heating complementary module. Background Technology

[0002] As living standards continue to improve, people's requirements for indoor environmental comfort are also gradually increasing. Variable air volume (VAV) air conditioning systems are commonly used in high-end office buildings. A VAV air conditioning system is an all-air conditioning system that controls indoor air temperature parameters by maintaining a stable supply air temperature from the air handling unit and changing the supply air volume of the air handling unit or air conditioning terminal unit.

[0003] For buildings with large depths, the air conditioning needs vary in different locations within an air-conditioned area. If different air conditioning measures are installed in different locations within an air-conditioned area, cooling and heating cancellation can easily occur between different air-conditioned areas. This cancellation is even more pronounced in variable air volume (VAV) air conditioning systems, leading to lower energy efficiency. Summary of the Invention

[0004] This invention provides a control method and device for a variable air volume air conditioning system with a cooling and heating complementary module. It aims to solve the problem in the prior art where different air conditioning measures are set at different locations in the air-conditioned area, which easily leads to cooling and heating cancellation between different air-conditioned areas, resulting in low energy utilization.

[0005] To address the aforementioned problems, in a first aspect, embodiments of the present invention provide a control method for a variable air volume (VAV) air conditioning system with a cooling and heating complementary module. The VAV air conditioning system includes a control module, a cooling and heating complementary module, VAV terminals, and a VAV air conditioning unit. The cooling and heating complementary module includes a temperature sensor and a cross-flow fan. The temperature sensor and the cross-flow fan are connected to the control module, and the control module is connected to the VAV air conditioning unit and the VAV terminals. The control method includes:

[0006] When the control module receives the partitioning instruction, it divides the air-conditioning area into an inner air-conditioning zone and an outer air-conditioning zone according to the partitioning conditions.

[0007] The cooling and heating complementary module obtains the inner temperature of the air-conditioning inner zone and the outer temperature of the air-conditioning outer zone in real time according to the temperature detector, and sends the inner temperature and the outer temperature to the control module;

[0008] The control module compares the inner zone temperature and the outer zone temperature to obtain the temperature difference value;

[0009] If the control module detects that the temperature difference value is not equal to zero, it controls the cooling and heating complementary module to start the cross-flow fan to perform cooling and heating complementary air circulation processing until the temperature difference value is detected to be equal to zero, at which point the cross-flow fan is turned off, and the temperature detector is controlled to actively acquire the temperature value of the air-conditioned area after cooling and heating complementarity.

[0010] The control module compares the temperature value after the cooling and heating are complemented with the preset indoor temperature to obtain the temperature comparison result, and obtains the indoor demand after the complementation in real time based on the temperature comparison result.

[0011] The control module determines the supply air temperature and supply air volume based on the complementary indoor demand, and sends the supply air temperature and supply air volume to the variable air volume air conditioning unit and the variable air volume terminal to start operation.

[0012] Secondly, embodiments of the present invention also provide a control device for a variable air volume (VAV) air conditioning system with a cooling and heating complementary module, wherein the VAV air conditioning system includes a control module, a cooling and heating complementary module, a VAV terminal unit, and a VAV air conditioning unit; the cooling and heating complementary module includes a temperature detector and a cross-flow fan; the temperature detector and the cross-flow fan are connected to the control module, and the control module is connected to the VAV air conditioning unit and the VAV terminal unit;

[0013] The control module is used to divide the air-conditioning area into an inner air-conditioning zone and an outer air-conditioning zone according to the partitioning conditions when it receives a partitioning instruction.

[0014] The cooling and heating complementary module is used to acquire the inner zone temperature of the air-conditioned inner zone and the outer zone temperature of the air-conditioned outer zone in real time according to the temperature detector, and send the inner zone temperature and the outer zone temperature to the control module; wherein, the temperature detector includes an inner zone temperature detector and an outer zone temperature detector;

[0015] The control module is also used to compare the inner zone temperature and the outer zone temperature to obtain a temperature difference value;

[0016] The control module is also used to control the cooling and heating complementary module to start the cross-flow fan to perform cooling and heating complementary air circulation processing when the temperature difference value is detected to be non-zero, until the cross-flow fan is turned off when the temperature difference value is detected to be zero, and to control the temperature detector to actively acquire the temperature value of the air-conditioned area after cooling and heating complementarity.

[0017] The control module is also used to compare the temperature value after the cooling and heating complementation with the preset indoor temperature to obtain the temperature comparison result, and to obtain the indoor demand after the complementation in real time based on the temperature comparison result.

[0018] The control module is also used to determine the supply air temperature and supply air volume according to the complementary indoor demand, and send the supply air temperature and supply air volume to the variable air volume air conditioning unit and the variable air volume terminal to start operation.

[0019] This invention provides a control method and apparatus for a variable air volume (VAV) air conditioning system with a cooling and heating complementary module. The VAV air conditioning system includes a control module, a cooling and heating complementary module, VAV terminal units, and a VAV air conditioning unit. The cooling and heating complementary module includes a temperature sensor and a cross-flow fan. The temperature sensor and the cross-flow fan are connected to the control module, and the control module is connected to the VAV air conditioning unit and the VAV terminal units. The control method includes: when the control module receives a zoning command, it divides the air conditioning area into an inner air conditioning zone and an outer air conditioning zone according to zoning conditions; the cooling and heating complementary module obtains the inner zone temperature of the inner air conditioning zone and the outer zone temperature of the outer air conditioning zone in real time based on the temperature sensor, and sends the inner zone temperature and the outer zone temperature to the control module. The control module compares the inner zone temperature and the outer zone temperature to obtain a temperature difference value. If the control module detects that the temperature difference value is not equal to zero, it controls the cooling and heating complementary module to start the cross-flow fan to perform cooling and heating complementary air circulation processing until the temperature difference value is detected to be equal to zero, at which point the cross-flow fan is turned off, and the temperature detector is controlled to actively acquire the cooling and heating complementary temperature value of the air-conditioned area. The control module compares the cooling and heating complementary temperature value with the preset indoor temperature to obtain a temperature comparison result, and acquires the complementary indoor demand in real time based on the temperature comparison result. The control module determines the supply air temperature and supply air volume based on the complementary indoor demand, and sends the supply air temperature and supply air volume to the variable air volume air conditioning unit and the variable air volume terminal to start operation. Therefore, after performing complementary air circulation treatment for the air-conditioned area, the supply air temperature and supply air volume are determined according to the complementary indoor demand. Then, the variable air volume air conditioning system uses the variable air volume air conditioning unit and the variable air volume terminal to supply air as needed, thereby actively and better reducing or avoiding the cooling and heating cancellation phenomenon between different air-conditioned areas, and thus improving energy utilization. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic structural diagram of a variable air volume air conditioning system with a cooling and heating complementary module provided in an embodiment of the present invention;

[0022] Figure 2 A schematic structural diagram of the cooling and heating complementary module in a variable air volume air conditioning system with a cooling and heating complementary module provided in an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of air circulation processing with complementary cooling and heating in a variable air volume air conditioning system with a complementary cooling and heating module provided in an embodiment of the present invention.

[0024] Figure 4 A flowchart illustrating the control method of a variable air volume air conditioning system with a cooling and heating complementary module provided in an embodiment of the present invention.

[0025] Figure 5 A schematic diagram of the control device for a variable air volume air conditioning system with a cooling and heating complementary module provided in an embodiment of the present invention.

[0026] The following are the labeling elements in the figure:

[0027] 1. Variable air volume (VAV) air conditioning system with a cooling and heating complementary module; 10. Control module; 20. Cooling and heating complementary module; 21. Inner zone temperature sensor; 22. Outer zone temperature sensor; 23. Cross-flow fan; 24. Inner zone return air vent; 25. Outer zone supply air vent; 26. Disinfection device; 27. Primary filter; 30. Variable air volume terminal; 40. Variable air volume air conditioning unit; 50. Outer zone heating equipment; 2. Control device for the VAV air conditioning system with a cooling and heating complementary module. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The directional terms used in this invention, such as "up," "down," "front," "back," "left," "right," "inner," "outer," and "side," are merely for reference to the accompanying drawings. Therefore, the directional terms used are for illustrating and understanding this invention, and not for limiting it. Furthermore, in the drawings, structures that are similar or identical are indicated by the same reference numerals.

[0030] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0031] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0032] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0033] Please see Figure 1-4 , Figure 1 A schematic structural diagram of a variable air volume air conditioning system with a cooling and heating complementary module provided in an embodiment of the present invention; Figure 2 A schematic structural diagram of the cooling and heating complementary module in a variable air volume air conditioning system with a cooling and heating complementary module provided in an embodiment of the present invention; Figure 3 A schematic diagram of air circulation processing with complementary cooling and heating in a variable air volume air conditioning system with a complementary cooling and heating module provided in an embodiment of the present invention. Figure 4 This is a flowchart illustrating the control method for a variable air volume air conditioning system with a cooling and heating complementary module provided in an embodiment of the present invention.

[0034] like Figure 1-4 As shown, this embodiment of the invention provides a control method for a variable air volume air conditioning system with a cooling and heating complementary module. Figure 2 This is a flowchart illustrating the control method for a variable air volume (VAV) air conditioning system with a cooling and heating complementary module provided in an embodiment of the present invention. The control method for the VAV air conditioning system with a cooling and heating complementary module is applied to... Figure 1 In a variable air volume (VAV) air conditioning system 1 with a cooling and heating complementary module 20. The VAV air conditioning system includes a control module, a cooling and heating complementary module, VAV terminals, and a VAV air conditioning unit; the cooling and heating complementary module includes a temperature detector and a cross-flow fan; the temperature detector and the cross-flow fan are connected to the control module, and the control module is connected to the VAV air conditioning unit and the VAV terminals.

[0035] In this embodiment, as Figure 1-4As shown, the control method of the variable air volume (VAV) air conditioning system with a cooling and heating complementary module is applied to the VAV air conditioning system 1 (hereinafter referred to as VAV air conditioning system 1), specifically referring to a control method with an active cooling and heating complementary function for the air-conditioned areas; the control module 10 is the main control terminal, which initiates commands to control the operation of the process; the cooling and heating complementary module 20 includes, but is not limited to: temperature detectors, cross-flow fans 23, inner zone temperature detectors 21, outer zone temperature detectors 22, inner zone return air vents 24, outer zone supply air vents 25, disinfection devices 26, primary filters 27, air ducts or air outlets, and other accessories; the VAV terminal 30 is taken as a single-duct type in this scheme, and is arranged separately according to the division of the air-conditioned areas in the system, including main air supply pipes and branch air ducts, to arrange the space between the air-conditioned areas, and is connected to different air outlets through branch air ducts; the VAV air conditioning unit 40 or the VAV terminal 30 is a component that outputs the supply air temperature and supply air volume.

[0036] The variable air volume (VAV) air conditioning system 1 achieves full-air air conditioning system control of the air-conditioned area, i.e., the indoor air temperature parameter, by maintaining a stable supply air temperature of the VAV air conditioning unit 40 and changing the supply air volume of the VAV air conditioning unit 40 or the VAV terminal 30.

[0037] The variable air volume (VAV) air conditioning system 1 also includes an air outlet module and an air duct module. The air outlet module includes an inner zone air outlet strip and an outer zone air outlet strip. The inner zone return air inlet 24 is located in the inner zone air outlet strip, and the outer zone supply air inlet 25 is located in the outer zone air outlet strip. The cross-flow fan 23, the disinfection device 26, and the primary filter 27 are suspended in the beam recess of the air-conditioned area. It should be noted that the partial air duct in the cooling and heating complementary module 20 bends at the secondary beam of the air-conditioned area, which has virtually no impact on the net height.

[0038] The control method includes the following steps S110-S160.

[0039] S110. When the control module receives the partitioning instruction, it divides the air-conditioning area into an inner air-conditioning zone and an outer air-conditioning zone according to the partitioning conditions.

[0040] In this embodiment, as Figure 1-4 As shown, based on the obtained partitioning instructions, the air conditioning area is divided into the air conditioning inner zone and the air conditioning outer zone according to the partitioning conditions.

[0041] In one embodiment, when the control module receives a zoning instruction, it divides the air-conditioned area into an inner air-conditioned zone and an outer air-conditioned zone according to the zoning conditions, including:

[0042] In response to the zoning command, the functional purpose of the air-conditioned zone, the thermal performance of the building envelope, and the local climate conditions are obtained as the zoning conditions.

[0043] The division structure of the air-conditioned area is determined based on the functional purpose and the thermal performance of the building envelope;

[0044] The air-conditioned area is divided into an inner air-conditioned zone and an outer air-conditioned zone using the local climate conditions and the division structure.

[0045] In this embodiment, the functional purpose, thermal performance of the building envelope, and local climate conditions of the air-conditioned area are obtained according to the zoning instructions and used as the zoning conditions; the division structure of the air-conditioned area is determined according to the functional purpose and thermal performance of the building envelope; the air-conditioned area is divided using the local climate conditions and the division structure to obtain the air-conditioned inner zone and the air-conditioned outer zone.

[0046] The zoning command can be issued by the zoning button; the function and purpose refer to the specific use and characteristics of the air-conditioned area; the thermal performance of the building envelope refers to the curtain wall structure of the air-conditioned area, etc.; and the local climate conditions refer to the climate conditions of the region where the air-conditioned area is located.

[0047] The functional purpose, thermal performance of the building envelope, and local climate conditions of the air-conditioned area obtained based on the partitioning instruction are used as the partitioning conditions to divide the area into the inner air-conditioned zone and the outer air-conditioned zone. The specific acquisition or partitioning process can also be performed manually, i.e., set according to the actual situation.

[0048] As can be seen from the above embodiments, the functional purpose of the air-conditioned area, the thermal performance of the building envelope, and the local climate conditions obtained based on the zoning command are used as zoning conditions to divide the area into inner and outer air-conditioned zones. Therefore, using multiple conditions as zoning criteria improves the accuracy of the division, enhances the rational planning of the air-conditioned areas, and allows for subsequent targeted processing based on the inner and outer air-conditioned zones.

[0049] In one embodiment, after the control module receives a partitioning instruction and divides the air conditioning area into an inner air conditioning zone and an outer air conditioning zone according to the partitioning conditions, the method further includes:

[0050] Real-time acquisition of the inner zone parameters of the air conditioner's inner zone and the outer zone parameters of the air conditioner's outer zone;

[0051] The load results of the inner zone are obtained by calculating the parameters of the inner zone based on the preset load calculation model.

[0052] The load results for the outer zone are obtained by calculating the parameters of the outer zone based on the load calculation model.

[0053] The load demand value is obtained by balancing the load results of the inner zone and the load results of the outer zone.

[0054] The number of cooling and heating complementary modules in the variable air volume air conditioning system is determined based on the load demand value.

[0055] In this embodiment, as Figure 1-4 As shown, the load calculation model is implemented using a load calculation algorithm, and the specific settings can be customized according to the actual situation.

[0056] Furthermore, the calculation of the inner zone parameters based on the preset load calculation model to obtain the inner zone load result includes:

[0057] The internal zone parameters are analyzed to obtain multiple internal zone sub-parameters; wherein, the multiple internal zone sub-parameters include internal zone area, preset internal zone temperature, preset internal zone humidity, internal zone fresh air volume, internal zone personnel density, internal zone lighting power, and internal zone equipment power;

[0058] The inner zone sub-parameters are sequentially input into the load calculation model to obtain multiple inner zone load sub-results;

[0059] The multiple inner zone load sub-results are combined to form the inner zone load result.

[0060] In this embodiment, as Figure 1-4 As shown, the internal zone parameters are obtained by analyzing and processing the internal zones of the air conditioning system, including multiple internal zone sub-parameters. These internal zone parameters can be parsed and processed according to their names or units to obtain multiple internal zone sub-parameters. The preset internal zone temperature is taken according to the Level I comfort value recommended in Clause 3.0.2 of GB 50736-2012 "Code for Design of Heating, Ventilation and Air Conditioning of Civil Buildings".

[0061] Multiple internal zone sub-parameters are sequentially input into the load calculation model to obtain multiple internal zone load sub-results. The multiple internal zone load sub-results are combined to form the internal zone load result. The internal zone load result includes multiple internal zone load sub-results, which may include internal zone personnel load, internal zone equipment load, internal zone lighting load, internal zone fresh air load, etc.

[0062] Further, the step of calculating the external zone load results based on the load calculation model includes:

[0063] Multiple external zone sub-parameters are obtained by analyzing the external zone parameters; wherein, the multiple external zone sub-parameters include external zone area, curtain wall heat transfer coefficient, preset external zone temperature, preset external zone humidity, external zone fresh air volume, external zone personnel density, external zone lighting power, and external zone equipment power;

[0064] The multiple outer zone sub-parameters are sequentially input into the load calculation model to obtain multiple outer zone load sub-results;

[0065] The multiple external load sub-results are combined to form the external load result.

[0066] In this embodiment, as Figure 1-4 As shown, the outer zone parameters are obtained by analyzing and processing the air conditioning outer zone, including multiple outer zone sub-parameters. These outer zone parameters can be parsed and processed according to their names or units to obtain multiple outer zone sub-parameters. Specifically, the curtain wall heat transfer coefficient is taken as an example with a translucent curtain wall as the building envelope, and its heat transfer coefficient is taken according to the limit value of GB 55015—2021 "General Specification for Energy Conservation and Renewable Energy Utilization in Buildings"; the preset outer zone temperature is taken according to the heating condition level I comfort level, and the temperature difference between the preset inner zone temperature and the preset outer zone temperature is 2℃.

[0067] Multiple external zone sub-parameters are sequentially input into the load calculation model to obtain multiple external zone load sub-results. The multiple external zone load sub-results are then combined to form the external zone load result. The external zone load result includes multiple external zone load sub-results, which may include external zone personnel load, external zone equipment load, external zone lighting load, external zone fresh air load, etc.

[0068] Further, the step of balancing the load results of the inner zone and the load results of the outer zone to obtain the load demand value includes:

[0069] The inner zone cooling load is obtained by performing a hot and cold division process on multiple inner zone load sub-results in the inner zone load results.

[0070] The multiple sub-results of the external zone load results are divided into cold and hot loads to obtain the external zone cold load and the external zone heat load, and the external zone cold load and the external zone heat load are balanced to obtain the external zone balanced load.

[0071] The load demand value is obtained by balancing the cooling load of the inner zone and the balanced load of the outer zone.

[0072] In this embodiment, as Figure 1-4As shown, taking winter as an example, based on a preset cold and hot division strategy, multiple sub-results of the inner zone load results are processed to obtain the inner zone cold load; based on the cold and hot division strategy, multiple sub-results of the outer zone load results are processed to obtain the outer zone cold load and the outer zone heat load; the outer zone cold load and the outer zone heat load are balanced to obtain the outer zone balanced load; and the inner zone cold load and the outer zone balanced load are balanced to obtain the load demand value.

[0073] The hot / cold load division strategy utilizes different load sub-results from the inner and outer zone load results to divide the loads according to hot / cold loads. For example, personnel, equipment, and lighting loads are considered cold loads, while curtain wall and fresh air loads are considered hot loads. Since the quantity of personnel's wet load is relatively small, its impact on the load balance between the inner and outer zones is negligible. Because the fresh air is cooled and heated by the variable air volume (VAV) air conditioning unit 40, its load does not need to be included in the load balance process, but should be considered in its air handling unit load. Since the heat recovery from fresh air and exhaust has no impact on the load balance of this device, this energy-saving benefit can be disregarded. Other factors such as heat transfer between households and heat dissipation from terminal fans (if present) have virtually no impact on the load balance between the inner and outer zones and are also disregarded. It should be noted that the indoor lighting fixtures in the air-conditioned areas do not have intelligent dimming functions; therefore, the lighting power in the air-conditioned areas is the same. Seats in the air-conditioned areas are arranged side-by-side, and there is no difference in personnel density and equipment power between the inner and outer zones. Other factors, such as heat transfer between households and heat dissipation from terminal fans (if any), have little impact on the load balance between indoor and outdoor areas and are not included in the discussion.

[0074] Further, determining the number of cooling and heating complementary modules in the variable air volume air conditioning system based on the load demand value includes:

[0075] The load demand value is compared with the preset load value range to obtain the comparison result;

[0076] The number of devices in the cooling and heating complementary module is determined based on the comparison results, the temperature difference between the inner and outer zones, and the preset air volume.

[0077] In this embodiment, as Figure 1-4 As shown, the load value range includes multiple load value sub-ranges, each corresponding to a different value; if the comparison result shows that the load demand value falls within one load value sub-range, then the number of devices is the value corresponding to that load value sub-range. The temperature difference between the inner and outer zones is 2℃; the preset airflow is the medium-range airflow of the cross-flow fan, i.e., 1000m³ / h. 3 It should be noted that the determination of whether to install the cooling and heating complementary module 20 can be based on the room type of the air-conditioned area.

[0078] Furthermore, the multiple outer zone sub-parameters and multiple inner zone sub-parameters can be further balanced based on the building orientation and area corner of the air-conditioned area to obtain the load demand value; wherein, the building orientation includes north, east, south, and west; and the area corner includes northeast, southeast, southwest, and northwest.

[0079] As can be seen from the above embodiments, the load results for the inner zone and outer zone are obtained by calculating the parameters of the inner zone and the parameters of the outer zone based on the preset load calculation model; the load demand value is obtained by balancing the load results of the inner zone and the outer zone; and the number of cooling and heating complementary modules 20 in the variable air volume air conditioning system 1 is determined by using the load demand value. Therefore, the rationality of the overall layout is improved, thereby improving the energy utilization rate.

[0080] S120. The cooling and heating complementary module obtains the inner temperature of the air-conditioning inner zone and the outer temperature of the air-conditioning outer zone in real time according to the temperature detector, and sends the inner temperature and the outer temperature to the control module.

[0081] In this embodiment, as Figure 1-4 As shown, after the variable air volume air conditioning system 1 is started by the control module 10, the cooling and heating complementary module 20 automatically starts the temperature detector to obtain the inner zone temperature of the air conditioning inner zone and the outer zone temperature of the air conditioning outer zone in real time.

[0082] In one embodiment, the temperature detectors of the cooling and heating complementary module include an inner zone temperature detector and an outer zone temperature detector, both of which are connected to the control module. The cooling and heating complementary module acquires the inner zone temperature of the air-conditioned inner zone and the outer zone temperature of the air-conditioned outer zone in real time based on the temperature detectors, and sends the inner zone temperature and the outer zone temperature to the control module, including:

[0083] The internal temperature of the air-conditioned internal zone is obtained based on the internal zone temperature detector;

[0084] The temperature of the outer zone of the air conditioner is obtained based on the outer zone temperature detector.

[0085] The inner zone temperature and the outer zone temperature are then sent to the control module.

[0086] In this embodiment, as Figure 1-4As shown, the inner zone temperature detector 21 is located in the inner zone of the air conditioner; the outer zone temperature detector 22 is located in the outer zone of the air conditioner. The inner zone temperature detector 21 can detect the inner zone of the air conditioner in real time according to a preset time period to obtain the inner zone temperature; the outer zone temperature detector 22 also detects the outer zone of the air conditioner in real time according to the same time period to obtain the outer zone temperature. Simultaneously, the cooling and heating complementary module 20 sends the inner zone temperature and the outer zone temperature to the control module 10.

[0087] Through the above embodiments, it can be seen that the inner zone temperature of the air conditioner's inner zone is obtained by the inner zone temperature detector 21; the outer zone temperature of the air conditioner's outer zone is obtained by the outer zone temperature detector 22; and the inner zone temperature and the outer zone temperature are sent to the control module 10. This realizes the real-time acquisition of the inner and outer zone temperatures of the air conditioner through temperature detectors, improving the accuracy of temperature acquisition; and the inner zone temperature and the outer zone temperature are sent to the control module 10 so that the control module 10 can perform subsequent targeted processing based on the inner zone temperature and the outer zone temperature.

[0088] S130, The control module compares the inner zone temperature and the outer zone temperature to obtain a temperature difference value.

[0089] In this embodiment, as Figure 1-4 As shown, the control module 10 compares the acquired inner zone temperature and outer zone temperature to obtain the temperature difference value, and performs subsequent targeted processing based on the temperature difference value.

[0090] S140. If the control module detects that the temperature difference value is not equal to zero, it controls the cooling and heating complementary module to start the cross-flow fan to perform cooling and heating complementary air circulation processing until the temperature difference value is detected to be equal to zero, at which point the cross-flow fan is turned off, and the temperature detector is controlled to actively acquire the temperature value of the air-conditioned area after cooling and heating complementarity.

[0091] In this embodiment, as Figure 1-4 As shown, the control module 10 detects and processes the temperature difference value, and performs different control processes on the cold and heat complementary module 20 based on whether the temperature difference value is equal to zero.

[0092] In one embodiment, the cooling and heating complementary module further includes an inner zone return air vent, an outer zone supply air vent, and a disinfection device. The inner zone return air vent, the outer zone supply air vent, and the disinfection device are all connected to the control module and the variable air volume terminal. If the control module detects that the temperature difference value is not equal to zero, it controls the cooling and heating complementary module to start the cross-flow fan for cooling and heating complementary air circulation processing until the temperature difference value is detected to be equal to zero, at which point the cross-flow fan is turned off. The control module then controls the temperature detector to actively acquire the temperature value of the air-conditioned area after cooling and heating complementarity, including:

[0093] If the detected temperature difference value is not equal to zero, the cooling and heating complementary module is controlled to start the cross-flow fan to perform cooling and heating complementary air circulation treatment.

[0094] The cross-flow fan draws air from the air-conditioned inner zone through the inner zone return air inlet, and the air drawn into the air-conditioned inner zone is purified and disinfected by the disinfection device to obtain purified air;

[0095] The purified air is delivered from the outer air outlet into the air-conditioned outer zone using the cross-flow fan until the temperature difference is zero. Then the cross-flow fan is turned off, and the temperature value of the air-conditioned area after the cooling and heating are actively acquired by the temperature detector.

[0096] In this embodiment, as Figure 1-4 As shown, when the control module 10 detects that the temperature difference value is not equal to zero, it controls the cooling and heating complementary module 20 to start the cross-flow fan 23 to perform cooling and heating complementary air circulation. Specifically, when the temperature difference value is not equal to zero, the temperature difference value is compared with a preset temperature difference range to obtain a temperature difference confirmation result. The speed setting of the cross-flow fan 23 is determined based on the temperature difference confirmation result. The temperature difference range includes a first temperature difference range, a second temperature difference range, and a third temperature difference range; the boundary value of the first temperature difference range is less than or equal to the boundary value of the second temperature difference range; the boundary value of the second temperature difference range is less than or equal to the boundary value of the third temperature difference range. If the temperature difference confirmation result is that the temperature difference value is within the first temperature difference range, then the speed setting of the cross-flow fan 23 is set to level one, which is a low airflow of 750 m³ / h. 3 / h; If the temperature difference confirmation result is that the temperature difference value is within the second temperature difference range, then the gear value of the cross-flow fan 23 is gear two, which is a medium air volume of 1000m³ / h. 3 / h; If the temperature difference confirmation result is that the temperature difference value is within the third temperature difference range, then the gear value of the cross-flow fan 23 is high, and its high gear is low air volume 1250m³ / h. 3 / h; that is, the gear of the cross-flow fan 23 is determined based on the temperature difference range in which the temperature difference value is located so that the cross-flow fan 23 can be operated by frequency conversion.

[0097] The cooling and heating complementary module 20 also includes a pre-filter 27, which can filter the air drawn into the air-conditioned interior zone.

[0098] The effect of the air volume generated by the cross-flow fan 23, such as Figure 3As shown, air from the inner air-conditioning zone is drawn in through the inner air return vent 24; the drawn-in air from the inner air-conditioning zone is filtered through the primary filter 27 to obtain filtered air, and the filtered air is purified and disinfected by the disinfection device 26 to obtain purified air; the purified air is sent into the outer air-conditioning zone through the outer air supply vent 25 by the cross-flow fan 23 until the temperature difference is equal to zero, the cross-flow fan 23 is turned off, and the temperature value of the air-conditioning zone after the cooling and heating are actively acquired by the temperature detector.

[0099] Through the above embodiments, it can be seen that when the temperature difference is not zero, the cross-flow fan 23 draws in air from the inner zone return air inlet 24, and the air is filtered, purified, and disinfected by the pre-filter 27 and the disinfection device 26 to obtain purified air. The cross-flow fan 23 then sends the purified air from the outer zone air outlet 25 into the outer zone of the air conditioner, thereby achieving complementary air circulation between the inner and outer zones of the air conditioner. This improves indoor air quality, reduces the occurrence of heat and cold offsetting phenomena, and thus improves energy efficiency. Furthermore, it allows for targeted subsequent treatment based on the temperature value after the heat and cold complementarity.

[0100] S150, The control module compares the temperature value after the cooling and heating is complementary with the preset indoor temperature to obtain the temperature comparison result, and obtains the indoor demand after the complementarity in real time based on the temperature comparison result.

[0101] In this embodiment, as Figure 1-4 As shown, the temperature comparison results include the following: the temperature value after the heat-cold complementation is less than the preset indoor temperature; the temperature value after the heat-cold complementation is greater than the preset indoor temperature; and the temperature value after the heat-cold complementation is equal to the preset indoor temperature. The indoor demand after the complementation includes indoor heating demand and indoor cooling demand.

[0102] Furthermore, the control module compares the temperature value after the cooling and heating complementation with the preset indoor temperature to obtain a temperature comparison result, and obtains the indoor demand after complementation in real time based on the temperature comparison result, including:

[0103] The temperature value after the heat and cold complementation is compared with the preset indoor temperature to obtain the temperature comparison result;

[0104] If the temperature comparison result is that the temperature value after the cold and heat complementation is less than the preset indoor temperature, then the indoor demand after the complementation is the indoor heating demand.

[0105] If the temperature comparison result is that the temperature value after the cold and heat complementation is greater than the preset indoor temperature, then the indoor demand after the complementation is the indoor cooling demand.

[0106] If the temperature comparison result is that the temperature value after the cold and heat complementation is equal to the preset indoor temperature, then the temperature detector continues to acquire the inner zone temperature of the air-conditioned inner zone and the outer zone temperature of the air-conditioned outer zone in real time for subsequent processing.

[0107] In this embodiment, as Figure 1-4 As shown, the temperature comparison result is obtained by comparing the temperature value after the heat and cold complementation with the preset indoor temperature. Then, the indoor demand after the complementation is determined to be either indoor heating demand or indoor cooling demand. In this way, subsequent targeted processing can be carried out based on the indoor demand after the complementation to reduce the heat and cold offset phenomenon and thus improve energy utilization.

[0108] S160. The control module determines the supply air temperature and supply air volume according to the complementary indoor demand, and sends the supply air temperature and supply air volume to the variable air volume air conditioning unit and the variable air volume terminal to start operation.

[0109] In this embodiment, as Figure 1-4 As shown, taking the transitional season (spring and autumn) as an example, based on the complementary indoor demand, and using the calculation strategy of the control module 10 to calculate the indoor air enthalpy and outdoor air enthalpy, the supply air temperature and supply air volume are jointly determined. Specifically, when the complementary indoor demand is for indoor cooling and the outdoor air enthalpy is lower than the indoor air enthalpy, the variable air volume (VAV) air conditioning unit 40 operates in 100% fresh air mode; when the complementary indoor demand is for indoor cooling and the outdoor air enthalpy is higher than the indoor air enthalpy, the VAV air conditioning unit 40 operates in cooling mode, and its supply air temperature and supply air volume are determined based on the temperature value after the complementary cooling and heating of the inner and outer air conditioning zones and the preset indoor temperature. The overall indoor cooling load demand is calculated using the load calculation model based on the temperature value after the complementary cooling and heating and the preset indoor temperature. The supply air temperature and supply air volume are determined by recalculating using the overall indoor cooling load demand and the air conditioning parameters of the variable air volume (VAV) air conditioning unit 40. When the complementary indoor demand is indoor heating demand and the outdoor air enthalpy is lower than the indoor air enthalpy, the VAV air conditioning unit 40 operates in heating mode, and its supply air temperature and supply air volume are determined based on the complementary temperature value of the indoor and outdoor zones and the preset indoor temperature. The complementary temperature value and the preset indoor temperature are calculated using the load calculation model to obtain the overall indoor heat load demand, and the supply air temperature and supply air volume are determined by recalculating using the overall indoor heat load demand and the air conditioning parameters of the VAV air conditioning unit 40. When the complementary indoor demand is indoor heating demand and the outdoor air enthalpy is higher than the indoor air enthalpy, the VAV air conditioning unit 40 operates in 100% fresh air mode.

[0110] In one embodiment, the control module determines the supply air temperature and supply air volume based on the complementary indoor demand, and sends the supply air temperature and supply air volume to the variable air volume (VAV) air conditioning unit and the VAV terminal to initiate operation, including:

[0111] The supply air temperature and the supply air volume are determined based on the complementary indoor requirements.

[0112] The supply air temperature and the supply air volume are sent to the variable air volume (VAV) air conditioning unit, which adjusts its operation according to the supply air temperature and the supply air volume to start running through the VAV terminal.

[0113] In this embodiment, as Figure 1-4 As shown, after determining the supply air temperature and supply air volume based on the complementary indoor demand, the supply air temperature and supply air volume are sent to the variable air volume air conditioning unit 40. The variable air volume air conditioning unit 40 adjusts according to the supply air temperature and supply air volume, and outputs the supply air temperature and supply air volume to the air conditioning inner zone and the air conditioning outer zone through the variable air volume terminal 30.

[0114] Taking winter operation as an example, based on the complementary indoor demand, and using the calculation strategy of the control module 10 to calculate the indoor air enthalpy and outdoor air enthalpy, the supply air temperature and supply air volume are jointly determined. Specifically, when the complementary indoor demand is for indoor cooling and the outdoor air enthalpy is lower than the indoor air enthalpy, the variable air volume (VAV) air conditioning unit 40 operates in 100% fresh air mode. When the complementary indoor demand is for indoor cooling and the outdoor air enthalpy is higher than the indoor air enthalpy, the VAV air conditioning unit 40 operates in cooling mode, and its supply air temperature and supply air volume are determined based on the temperature value after the complementary cooling and heating of the inner and outer air conditioning zones and the preset indoor temperature. The overall indoor cooling load demand is calculated using the load calculation model based on the temperature value after the complementary cooling and heating and the preset indoor temperature, and the indoor temperature is then used to calculate the overall indoor cooling load demand. The overall cooling load demand and the air conditioning parameters of the variable air volume (VAV) air conditioning unit 40 are recalculated to determine the supply air temperature and the supply air volume. When the complementary indoor demand is indoor heating demand and the outdoor air enthalpy is lower than the indoor air enthalpy, the VAV air conditioning unit 40 operates in heating mode, and its supply air temperature and supply air volume are determined based on the complementary temperature value of the indoor and outdoor zones and the preset indoor temperature. The complementary temperature value and the preset indoor temperature are calculated using the load calculation model to obtain the overall indoor heat load demand, and the overall indoor heat load demand and the air conditioning parameters of the VAV air conditioning unit 40 are recalculated to determine the supply air temperature and the supply air volume. When the complementary indoor demand is indoor heating demand and the outdoor air enthalpy is higher than the indoor air enthalpy, the VAV air conditioning unit 40 operates in 100% fresh air mode.

[0115] As can be seen from the above embodiments, based on different seasonal operating conditions, the supply air temperature and supply air volume are jointly determined by the complementary indoor demand, indoor air enthalpy, and outdoor air enthalpy. The supply air temperature and supply air volume are then sent to the variable air volume (VAV) air conditioning unit 40. The VAV air conditioning unit 40 adjusts according to the supply air temperature and supply air volume, and outputs the supply air temperature and supply air volume to the air-conditioned inner zone and air-conditioned outer zone through the VAV terminal 30, so as to reduce the cooling and heating cancellation phenomenon and thus improve energy utilization efficiency.

[0116] In one embodiment, the variable air volume (VAV) air conditioning system further includes an external zone heating device connected to the control module; after the control module determines the supply air temperature and supply air volume based on the complementary indoor demand, and sends the supply air temperature and supply air volume to the VAV air conditioning unit and the VAV terminal to start operation, the method further includes:

[0117] The control module uses the temperature detector to acquire the temperature value after operation in real time.

[0118] When the temperature detector detects in real time that the temperature value after operation is lower than the preset indoor temperature, the control module controls the external heating equipment to provide supplementary heating.

[0119] When the temperature detector detects in real time that the temperature value after operation is greater than the preset indoor temperature, the control module shuts down the external heating equipment.

[0120] In this embodiment, as Figure 1-4 As shown, the control module 10 controls the cooling and heating complementary module 20, the variable air volume (VAV) air conditioning unit 40, and the VAV terminal 30, and simultaneously uses the supply air temperature and supply air volume obtained through multiple processing steps to perform joint operation. Then, it uses the temperature detector to obtain the post-operation temperature value within the air-conditioned area in real time. When the temperature detector detects that the post-operation temperature value is lower than the preset indoor temperature, it controls the external zone heating device 50 to provide supplementary heating. Simultaneously, when the temperature detector detects that the post-operation temperature value is greater than or equal to the preset indoor temperature, it sends detection data to the control module 10 to shut down the external zone heating device 50. The external zone heating device is located in the external zone of the air-conditioned area; specifically, it can be located in a corner of the external zone.

[0121] Through the above embodiments, it can be seen that after controlling the cooling and heating complementary module 20, the variable air volume air conditioning unit 40 and the variable air volume terminal 30, and simultaneously using the supply air temperature and supply air volume obtained through multiple processing to perform joint operation, the control module 10 uses the temperature detector to obtain the temperature value after operation in the air-conditioned area in real time; when the temperature detector detects that the temperature value after operation is less than the preset indoor temperature, it controls the external zone heating device 50 to provide supplementary heating; at the same time, when the temperature detector detects that the temperature value after operation is greater than or equal to the preset indoor temperature, it sends detection data to the control module 10 to shut down the external zone heating device 50. Therefore, after performing air circulation processing to achieve complementary cooling and heating, the temperature value after the complementary cooling and heating is compared with the preset indoor temperature to obtain a temperature comparison result. Based on the temperature comparison result, the indoor demand after the complementary cooling and heating is obtained in real time. The supply air temperature and volume are determined based on this demand to control the complementary cooling and heating module 20, the variable air volume (VAV) air conditioning unit 40, and the VAV terminal 30. Simultaneously, the supply air temperature and volume obtained from multiple processing steps are used for joint operation. At this time, a temperature detector obtains the temperature value after operation in the air-conditioned area in real time. When the temperature detector detects that the temperature value after operation is lower than the preset indoor temperature, the external zone heating device 50 is controlled to provide supplementary heating. Conversely, when the temperature detector detects that the temperature value after operation is greater than or equal to the preset indoor temperature, detection data is sent to the control module 10 to shut down the external zone heating device 50. Therefore, when the temperature value after operation is lower than the preset indoor temperature, the external zone heating device 50 releases heat to supplement the heating, reducing the significant cooling and heating offset phenomenon and thus improving energy efficiency.

[0122] It should be noted that for situations where different zones within a building's air-conditioned area have simultaneous heating and cooling needs, various standards explicitly require that air conditioning systems avoid offsetting heating and cooling demand. GB 55015-2021 "General Code for Energy Conservation and Renewable Energy Utilization in Buildings" Article 3.2.17 and GB 50736-2012 "Code for Design of Heating, Ventilation and Air Conditioning of Civil Buildings" Article 7.3.5.4 stipulate that, except for air-conditioned zones with strict requirements for temperature and humidity fluctuation ranges, simultaneous heating and cooling processes should not exist within the same air handling system. GB 50189-2015 "Standard for Energy Conservation Design of Public Buildings" Article 4.3.21 stipulates that simultaneous heating and cooling processes are not advisable within the same air handling system. For situations where there is simultaneous demand for heating in external zones and cooling in internal zones during winter, the current common practice is to use a shared variable air volume (VAV) air conditioning system for both internal and external zones with separate heating equipment in the external zone, or to have separate VAV air conditioning systems for each zone, thereby avoiding simultaneous heating and cooling processes within the same air conditioning system.

[0123] Although the above system designs can avoid the exclusion of simultaneous heating and cooling processes within the same air conditioning system as required by regulations, the phenomenon of heat and cold cancellation still exists for the same floor or the entire building. Different scholars have analyzed various factors affecting the mixing loss between indoor and outdoor zones through experimental research and proposed various measures to reduce mixing loss. These measures are all passive and may achieve the goal of reducing mixing loss when the air-conditioned rooms are empty or static. However, after the building is put into use, different types of partitions and various furniture are often installed in functional areas. Coupled with random personnel activities, unreasonable placement of supply and return air vents, or air turbulence caused by excessively high supply air velocity, the goal of avoiding mixing loss and obtaining mixing benefits may not be achieved. Therefore, for buildings with indoor and outdoor zones and simultaneous heating and cooling air conditioning measures, relying solely on passive measures cannot avoid mixing loss, and the phenomenon of heat and cold cancellation will inevitably exist.

[0124] This solution actively replaces the air in the air-conditioned area using the cooling and heating complementary module 20. The cooler air from the outer air-conditioned area meets the cooling needs of the inner air-conditioned area, while the warmer air from the inner air-conditioned area meets the heating needs of the outer air-conditioned area. After the air-conditioned area undergoes cooling and heating complementary air circulation, the supply air temperature and supply air volume are determined based on the complementary indoor demand. The variable air volume (VAV) air conditioning system 1 then supplies air as needed using the VAV air conditioning unit 40 and the VAV terminal 30, thereby actively and better reducing or avoiding the cooling and heating cancellation phenomenon between different air-conditioned areas.

[0125] Meanwhile, this solution, utilizing the aforementioned heat and cold complementary module 20, can not only actively reduce the phenomenon of heat and cold offsetting, but also has advantages in cost accounting. The following analysis and demonstration will be based on a specific case:

[0126] Case 1 and Case 2 are both standard floors of office buildings, facing due south and due north, with floor plan dimensions of 48×48m, office area depth of 9m, corridor width of 1.8m, and two air conditioning room rooms diagonally located in the core area (central part of the building), with a total of two air conditioning units with an air volume of 22000m³ / h. 3 / h variable air volume (VAV) air conditioning units. Case 1: A VAV air conditioning unit is shared between the indoor and outdoor air conditioning zones; the VAV terminal is a single-duct type; and fan coil units are installed in the outdoor air conditioning zones as outdoor heating equipment. Case 2: A cooling and heating complementary module is used; the VAV air conditioning unit is the same as in Case 1, but its heating coil capacity is selected according to the balanced demand value after the above load balancing treatment; the number of fan coil units in the four corner areas is selected when the combined operation of the cooling and heating complementary module, VAV air conditioning unit, and VAV terminal cannot meet the preset indoor temperature; other positive orientations (due south, due north, etc.) of the outdoor air conditioning zones do not have fan coil units, i.e., no outdoor heating equipment is installed. From this, we can obtain the number of fan coil units in Case 1 and Case 2, the number of cooling and heating complementary modules in Case 2, and the cost reduction of Case 2 compared to Case 1 for typical cities in four climate zones, as detailed in Table 1:

[0127]

[0128] Table 1

[0129] The estimated price of the cooling and heating complementary module is around 850 yuan, and the external heating equipment is selected based on the 034 type fan coil unit, with a single unit price of approximately 550 yuan. The reduction in the number of fan coil units in the external air conditioning zone will lead to a reduction in hot water supply pipes and valves; the cost of these will be included in the cost savings based on the proportion of the reduced heating system capacity. In Case 2, the capacity of the heating coil in the variable air volume air conditioning unit is generally smaller than in Case 1, but the cost savings are difficult to determine; this solution is only considered as a benefit and is not included in the data calculation. Table 1 only estimates the cost savings for the standard floors of the case building. For the heating system of the entire building, after adopting the cooling and heating complementary module, the heating system capacity serving the external air conditioning zone is significantly reduced, and the corresponding operating costs will also decrease. Especially in Shenzhen, where summers are hot and winters are mild, the winter air conditioning heating system in the external air conditioning zone can be eliminated, resulting in considerable savings in initial investment and operating costs.

[0130] Therefore, the above design selection and cost estimation processes confirm that by adopting the aforementioned heat and cold complementary module, the heat and cold cancellation phenomenon between the inner and outer zones of the air conditioning system can be reduced or avoided. Furthermore, by setting reasonable operation control methods, the capacity of the heating equipment in the outer zone of the air conditioning system can be reduced or eliminated, thereby reducing the cost of the variable air volume (VAV) air conditioning system, achieving energy-saving operation of the VAV air conditioning system, reducing the air conditioning energy consumption of the entire building, and meeting the development needs of energy conservation and emission reduction.

[0131] like Figure 1-5 As shown, this embodiment of the invention also provides a control device for a variable air volume air conditioning system with a cooling and heating complementary module. Figure 5 This is a schematic framework diagram of the control device for a variable air volume air conditioning system with a cooling and heating complementary module provided in an embodiment of the present invention. Figure 5As shown, the variable air volume (VAV) air conditioning system includes a control module, a cooling and heating complementary module, VAV terminals, and a VAV air conditioning unit; the cooling and heating complementary module includes a temperature sensor and a cross-flow fan; the temperature sensor and the cross-flow fan are connected to the control module, and the control module is connected to the VAV air conditioning unit and the VAV terminals;

[0132] The control module is used to divide the air-conditioning area into an inner air-conditioning zone and an outer air-conditioning zone according to the partitioning conditions when it receives a partitioning instruction.

[0133] The cooling and heating complementary module is used to acquire the inner zone temperature of the air-conditioned inner zone and the outer zone temperature of the air-conditioned outer zone in real time according to the temperature detector, and send the inner zone temperature and the outer zone temperature to the control module; wherein, the temperature detector includes an inner zone temperature detector and an outer zone temperature detector;

[0134] The control module is also used to compare the inner zone temperature and the outer zone temperature to obtain a temperature difference value;

[0135] The control module is also used to control the cooling and heating complementary module to start the cross-flow fan to perform cooling and heating complementary air circulation processing when the temperature difference value is detected to be non-zero, until the cross-flow fan is turned off when the temperature difference value is detected to be zero, and to control the temperature detector to actively acquire the temperature value of the air-conditioned area after cooling and heating complementarity.

[0136] The control module is also used to compare the temperature value after the cooling and heating complementation with the preset indoor temperature to obtain the temperature comparison result, and to obtain the indoor demand after the complementation in real time based on the temperature comparison result.

[0137] The control module is also used to determine the supply air temperature and supply air volume according to the complementary indoor demand, and send the supply air temperature and supply air volume to the variable air volume air conditioning unit and the variable air volume terminal to start operation.

[0138] In this embodiment, the control device 2 of the variable air volume air conditioning system with a cooling and heating complementary module specifically refers to the control device of the variable air volume air conditioning system with the function of actively performing cooling and heating complementarity for the air-conditioned areas; the control module 10 is the main control terminal, which initiates commands to control the operation of the process; the cooling and heating complementary module 20 includes, but is not limited to: temperature detectors, cross-flow fans 23, inner zone temperature detectors 21, outer zone temperature detectors 22, inner zone return air inlets 24, outer zone supply air inlets 25, disinfection devices 26, primary filters 27, air ducts or air outlets and other accessories; the variable air volume terminal 30 is taken as a single-duct type in this solution, and is arranged separately according to the division of the air-conditioned areas in the system, including main air supply pipes and branch air ducts, to arrange the space between the air-conditioned areas, and is connected to different air outlets through branch air ducts; the variable air volume air conditioning unit 40 is a component that outputs supply air temperature and supply air volume.

[0139] The variable air volume (VAV) air conditioning system 1 achieves full-air air conditioning system control of the air-conditioned area, i.e., the indoor air temperature parameter, by maintaining a stable supply air temperature of the VAV air conditioning unit 40 and changing the supply air volume of the VAV air conditioning unit 40 or the VAV terminal 30.

[0140] The variable air volume (VAV) air conditioning system 1 also includes an air outlet module and an air duct module. The air outlet module includes an inner zone air outlet strip and an outer zone air outlet strip. The inner zone return air inlet 24 is located in the inner zone air outlet strip, and the outer zone supply air inlet 25 is located in the outer zone air outlet strip. The cross-flow fan 23, the disinfection device 26, and the primary filter 27 are suspended in the beam recess of the air-conditioned area. It should be noted that the partial air duct in the cooling and heating complementary module 20 bends at the secondary beam of the air-conditioned area, which has virtually no impact on the net height.

[0141] In one embodiment, the cooling and heating complementary module further includes an inner zone return air vent, an outer zone supply air vent, and a disinfection device. The inner zone return air vent, the outer zone supply air vent, and the disinfection device are all connected to the control module and the variable air volume terminal. If the control module detects that the temperature difference value is not equal to zero, it controls the cooling and heating complementary module to start the cross-flow fan for cooling and heating complementary air circulation processing until the temperature difference value is detected to be equal to zero, at which point the cross-flow fan is turned off. The control module also controls the temperature detector to actively acquire the temperature value of the air-conditioned area after cooling and heating complementarity, including:

[0142] If the detected temperature difference value is not equal to zero, the cooling and heating complementary module is controlled to start the cross-flow fan to perform cooling and heating complementary air circulation treatment.

[0143] The cross-flow fan draws air from the air-conditioned inner zone through the inner zone return air inlet, and the air drawn into the air-conditioned inner zone is purified and disinfected by the disinfection device to obtain purified air;

[0144] The purified air is delivered from the outer air outlet into the air-conditioned outer zone using the cross-flow fan until the temperature difference is zero. Then the cross-flow fan is turned off, and the temperature value of the air-conditioned area after the cooling and heating are actively acquired by the temperature detector.

[0145] In this embodiment, as Figure 1-5 As shown, when the control module 10 detects that the temperature difference value is not equal to zero, it controls the cooling and heating complementary module 20 to start the cross-flow fan 23 to perform cooling and heating complementary air circulation. Specifically, when the temperature difference value is not equal to zero, the temperature difference value is compared with a preset temperature difference range to obtain a temperature difference confirmation result. The speed setting of the cross-flow fan 23 is determined based on the temperature difference confirmation result. The temperature difference range includes a first temperature difference range, a second temperature difference range, and a third temperature difference range; the boundary value of the first temperature difference range is less than or equal to the boundary value of the second temperature difference range; the boundary value of the second temperature difference range is less than or equal to the boundary value of the third temperature difference range. If the temperature difference confirmation result is that the temperature difference value is within the first temperature difference range, then the speed setting of the cross-flow fan 23 is set to level one, which is a low airflow of 750 m³ / h. 3 / h; If the temperature difference confirmation result is that the temperature difference value is within the second temperature difference range, then the gear value of the cross-flow fan 23 is gear two, which is a medium air volume of 1000m³ / h. 3 / h; If the temperature difference confirmation result is that the temperature difference value is within the third temperature difference range, then the gear value of the cross-flow fan 23 is high, and its high gear is low air volume 1250m³ / h. 3 / h; that is, the gear of the cross-flow fan 23 is determined based on the temperature difference range in which the temperature difference value is located so that the cross-flow fan 23 can be operated by frequency conversion.

[0146] The cooling and heating complementary module 20 also includes a pre-filter 27, which can filter the air drawn into the air-conditioned interior zone.

[0147] The effect of the air volume generated by the cross-flow fan 23, such as Figure 3 As shown, air from the inner air-conditioning zone is drawn in through the inner air return vent 24; the drawn-in air from the inner air-conditioning zone is filtered through the primary filter 27 to obtain filtered air, and the filtered air is purified and disinfected by the disinfection device 26 to obtain purified air; the purified air is sent into the outer air-conditioning zone through the outer air supply vent 25 by the cross-flow fan 23 until the temperature difference is equal to zero, the cross-flow fan 23 is turned off, and the temperature value of the air-conditioning zone after the cooling and heating are actively acquired by the temperature detector.

[0148] In one embodiment, the control module determines the supply air temperature and supply air volume based on the complementary indoor demand, and sends the supply air temperature and supply air volume to the variable air volume (VAV) air conditioning unit and the VAV terminal to initiate operation, including:

[0149] The supply air temperature and the supply air volume are determined based on the complementary indoor requirements.

[0150] The supply air temperature and the supply air volume are sent to the variable air volume (VAV) air conditioning unit, which adjusts its operation according to the supply air temperature and the supply air volume to start running through the VAV terminal.

[0151] In this embodiment, as Figure 1-5 As shown, after determining the supply air temperature and supply air volume based on the complementary indoor demand, the supply air temperature and supply air volume are sent to the variable air volume (VAV) air conditioning unit. The VAV air conditioning unit adjusts according to the supply air temperature and supply air volume, and outputs the supply air temperature and supply air volume to the air conditioning inner zone and the air conditioning outer zone through the VAV terminal.

[0152] Taking winter operation as an example, based on the complementary indoor demand, and using the calculation strategy of the control module 10 to calculate the indoor air enthalpy and outdoor air enthalpy, the supply air temperature and supply air volume are jointly determined. Specifically, when the complementary indoor demand is for indoor cooling and the outdoor air enthalpy is lower than the indoor air enthalpy, the variable air volume (VAV) air conditioning unit 40 operates in 100% fresh air mode. When the complementary indoor demand is for indoor cooling and the outdoor air enthalpy is higher than the indoor air enthalpy, the VAV air conditioning unit 40 operates in cooling mode, and its supply air temperature and supply air volume are determined based on the temperature value after the complementary cooling and heating of the inner and outer air conditioning zones and the preset indoor temperature. The overall indoor cooling load demand is calculated using the load calculation model based on the temperature value after the complementary cooling and heating and the preset indoor temperature, and the indoor temperature is then used to calculate the overall indoor cooling load demand. The overall cooling load demand and the air conditioning parameters of the variable air volume (VAV) air conditioning unit 40 are recalculated to determine the supply air temperature and the supply air volume. When the complementary indoor demand is indoor heating demand and the outdoor air enthalpy is lower than the indoor air enthalpy, the VAV air conditioning unit 40 operates in heating mode, and its supply air temperature and supply air volume are determined based on the complementary temperature value of the indoor and outdoor zones and the preset indoor temperature. The complementary temperature value and the preset indoor temperature are calculated using the load calculation model to obtain the overall indoor heat load demand, and the overall indoor heat load demand and the air conditioning parameters of the VAV air conditioning unit 40 are recalculated to determine the supply air temperature and the supply air volume. When the complementary indoor demand is indoor heating demand and the outdoor air enthalpy is higher than the indoor air enthalpy, the VAV air conditioning unit 40 operates in 100% fresh air mode.

[0153] As can be seen from the above embodiments, based on different seasonal operating conditions, the supply air temperature and supply air volume are jointly determined by the complementary indoor demand, indoor air enthalpy, and outdoor air enthalpy. The supply air temperature and supply air volume are then sent to the variable air volume (VAV) air conditioning unit 40. The VAV air conditioning unit 40 adjusts according to the supply air temperature and supply air volume, and outputs the supply air temperature and supply air volume to the air-conditioned inner zone and air-conditioned outer zone through the VAV terminal 30, so as to reduce the cooling and heating cancellation phenomenon and thus improve energy utilization efficiency.

[0154] It should be noted that those skilled in the art can clearly understand that the specific implementation process of the above-mentioned device and each module can be referred to the corresponding description in the foregoing method embodiments. For the sake of convenience and brevity, it will not be repeated here.

[0155] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A control method for a variable air volume (VAV) air conditioning system with a cooling and heating complementary module, characterized in that, The variable air volume (VAV) air conditioning system includes a control module, a cooling and heating complementary module, VAV terminals, and a VAV air conditioning unit; the cooling and heating complementary module includes a temperature sensor and a cross-flow fan; the temperature sensor and the cross-flow fan are connected to the control module, and the control module is connected to the VAV air conditioning unit and the VAV terminals; the control method includes: When the control module receives the partitioning instruction, it divides the air-conditioning area into an inner air-conditioning zone and an outer air-conditioning zone according to the partitioning conditions. The cooling and heating complementary module obtains the inner temperature of the air-conditioning inner zone and the outer temperature of the air-conditioning outer zone in real time according to the temperature detector, and sends the inner temperature and the outer temperature to the control module; The control module compares the temperature of the inner zone and the temperature of the outer zone to obtain the temperature difference value; If the control module detects that the temperature difference value is not equal to zero, it controls the cooling and heating complementary module to start the cross-flow fan to perform cooling and heating complementary air circulation processing until the temperature difference value is detected to be equal to zero, at which point the cross-flow fan is turned off, and the temperature detector is controlled to actively acquire the temperature value of the air-conditioned area after cooling and heating complementarity. The control module compares the temperature value after the cooling and heating are complemented with the preset indoor temperature to obtain the temperature comparison result, and obtains the indoor demand after the complementation in real time based on the temperature comparison result. The control module determines the supply air temperature and supply air volume based on the complementary indoor demand, and sends the supply air temperature and supply air volume to the variable air volume air conditioning unit and the variable air volume terminal to start operation.

2. The control method according to claim 1, characterized in that, When the control module receives a partitioning command, it divides the air-conditioned area into an inner air-conditioned zone and an outer air-conditioned zone according to the partitioning conditions, including: In response to the zoning command, the functional purpose of the air-conditioned zone, the thermal performance of the building envelope, and the local climate conditions are obtained as the zoning conditions. The division structure of the air-conditioned area is determined based on the functional purpose and the thermal performance of the building envelope; The air-conditioned area is divided into an inner air-conditioned zone and an outer air-conditioned zone using the local climate conditions and the division structure.

3. The control method according to claim 1, characterized in that, When the control module receives the partitioning instruction, after dividing the air-conditioning area into an inner air-conditioning zone and an outer air-conditioning zone according to the partitioning conditions, the method further includes: Real-time acquisition of the inner zone parameters of the air conditioner's inner zone and the outer zone parameters of the air conditioner's outer zone; The load results of the inner zone are obtained by calculating the parameters of the inner zone based on the preset load calculation model. The load results for the outer zone are obtained by calculating the parameters of the outer zone based on the load calculation model. The load demand value is obtained by balancing the load results of the inner zone and the load results of the outer zone. The number of cooling and heating complementary modules in the variable air volume air conditioning system is determined based on the load demand value.

4. The control method according to claim 1, characterized in that, The temperature detectors of the cooling and heating complementary module include an inner zone temperature detector and an outer zone temperature detector, both of which are connected to the control module. The cooling and heating complementary module acquires the inner zone temperature of the air-conditioned inner zone and the outer zone temperature of the air-conditioned outer zone in real time based on the temperature detectors, and sends the inner zone temperature and the outer zone temperature to the control module, including: The internal temperature of the air-conditioned internal zone is obtained based on the internal zone temperature detector; The temperature of the outer zone of the air conditioner is obtained based on the outer zone temperature detector. The inner zone temperature and the outer zone temperature are then sent to the control module.

5. The control method according to claim 1, characterized in that, The cooling and heating complementary module further includes an inner zone return air vent, an outer zone supply air vent, and a disinfection device. The inner zone return air vent, the outer zone supply air vent, and the disinfection device are all connected to the control module and the variable air volume terminal. If the control module detects that the temperature difference value is not equal to zero, it controls the cooling and heating complementary module to start the cross-flow fan for cooling and heating complementary air circulation processing until the temperature difference value is detected to be equal to zero, at which point the cross-flow fan is turned off, and the control module controls the temperature detector to actively acquire the temperature value of the air-conditioned area after cooling and heating complementarity, including: If the detected temperature difference value is not equal to zero, the cooling and heating complementary module is controlled to start the cross-flow fan to perform cooling and heating complementary air circulation treatment. The cross-flow fan draws air from the air-conditioned inner zone through the inner zone return air inlet, and the air drawn into the air-conditioned inner zone is purified and disinfected by the disinfection device to obtain purified air; The purified air is delivered from the outer air outlet into the air-conditioned outer zone using the cross-flow fan until the temperature difference is zero. Then the cross-flow fan is turned off, and the temperature value of the air-conditioned area after the cooling and heating are actively acquired by the temperature detector.

6. The control method according to claim 5, characterized in that, The control module determines the supply air temperature and supply air volume based on the complementary indoor demand, and sends the supply air temperature and supply air volume to the variable air volume (VAV) air conditioning unit and the VAV terminal to start operation, including: The supply air temperature and the supply air volume are determined based on the complementary indoor requirements. The supply air temperature and the supply air volume are sent to the variable air volume (VAV) air conditioning unit, which adjusts its operation according to the supply air temperature and the supply air volume to start running through the VAV terminal.

7. The control method according to claim 1, characterized in that, The variable air volume (VAV) air conditioning system further includes an external zone heating device, which is connected to the control module. After the control module determines the supply air temperature and supply air volume based on the complementary indoor demand, and sends the supply air temperature and supply air volume to the VAV air conditioning unit and the VAV terminal to initiate operation, the method further includes: The control module uses the temperature detector to acquire the temperature value after operation in real time. When the temperature detector detects in real time that the temperature value after operation is lower than the preset indoor temperature, the control module controls the external heating equipment to provide supplementary heating. When the temperature detector detects in real time that the temperature value after operation is greater than the preset indoor temperature, the control module shuts down the external heating equipment.

8. A control device for a variable air volume air conditioning system with a cooling and heating complementary module, characterized in that, The variable air volume (VAV) air conditioning system includes a control module, a cooling and heating complementary module, VAV terminals, and a VAV air conditioning unit; the cooling and heating complementary module includes a temperature sensor and a cross-flow fan; the temperature sensor and the cross-flow fan are connected to the control module, and the control module is connected to the VAV air conditioning unit and the VAV terminals; The control module is used to divide the air-conditioning area into an inner air-conditioning zone and an outer air-conditioning zone according to the partitioning conditions when it receives a partitioning instruction. The cooling and heating complementary module is used to acquire the inner zone temperature of the air-conditioned inner zone and the outer zone temperature of the air-conditioned outer zone in real time according to the temperature detector, and send the inner zone temperature and the outer zone temperature to the control module; wherein, the temperature detector includes an inner zone temperature detector and an outer zone temperature detector; The control module is also used to compare the inner zone temperature and the outer zone temperature to obtain a temperature difference value; The control module is also used to control the cooling and heating complementary module to start the cross-flow fan to perform cooling and heating complementary air circulation processing when the temperature difference value is detected to be non-zero, until the cross-flow fan is turned off when the temperature difference value is detected to be zero, and to control the temperature detector to actively acquire the temperature value of the air-conditioned area after cooling and heating complementarity. The control module is also used to compare the temperature value after the cooling and heating complementation with the preset indoor temperature to obtain the temperature comparison result, and to obtain the indoor demand after the complementation in real time based on the temperature comparison result. The control module is also used to determine the supply air temperature and supply air volume according to the complementary indoor demand, and send the supply air temperature and supply air volume to the variable air volume air conditioning unit and the variable air volume terminal to start operation.

9. The control device according to claim 8, characterized in that, The cooling and heating complementary module further includes an inner zone return air vent, an outer zone supply air vent, and a disinfection device. The inner zone return air vent, the outer zone supply air vent, and the disinfection device are all connected to the control module and the variable air volume terminal. If the control module detects that the temperature difference is not equal to zero, it controls the cooling and heating complementary module to start the cross-flow fan for cooling and heating complementary air circulation processing until the temperature difference is detected to be equal to zero, at which point the cross-flow fan is turned off, and the control module controls the temperature detector to actively acquire the temperature value of the air-conditioned area after cooling and heating complementarity, including: If the detected temperature difference value is not equal to zero, the cooling and heating complementary module is controlled to start the cross-flow fan to perform cooling and heating complementary air circulation treatment. The cross-flow fan draws air from the air-conditioned inner zone through the inner zone return air inlet, and the air drawn into the air-conditioned inner zone is purified and disinfected by the disinfection device to obtain purified air; The purified air is delivered from the outer air outlet into the air-conditioned outer zone using the cross-flow fan until the temperature difference is zero. Then the cross-flow fan is turned off, and the temperature value of the air-conditioned area after the cooling and heating are actively acquired by the temperature detector.

10. The control device according to claim 8, characterized in that, The control module determines the supply air temperature and supply air volume based on the complementary indoor demand, and sends the supply air temperature and supply air volume to the variable air volume (VAV) air conditioning unit and the VAV terminal to start operation, including: The supply air temperature and the supply air volume are determined based on the complementary indoor requirements. The supply air temperature and the supply air volume are sent to the variable air volume (VAV) air conditioning unit, which adjusts its operation according to the supply air temperature and the supply air volume to start running through the VAV terminal.

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