Air conditioning terminal control method and air conditioning unit

Abstract

The present invention discloses an air conditioning terminal control method and air conditioning unit. The present invention proposes an air conditioning terminal control method in which multiple air conditioning terminals are connected via a main pipeline. By detecting the pressure differential and flow rate of a bipolar hydraulic fan, the bipolar hydraulic fan's drive rotor is controlled to operate in series or parallel, or in single-stage operation, based on the detected flow rate and pressure differential. Specifically, parallel operation is used to increase flow rate when there is excess flow, while series operation is used to reduce the pressure differential when the pressure differential is excessive, thereby achieving efficient and stable operation of the system. This method solves the technical problem of mismatch between flow rate and pressure differential in water pumps in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning, and in particular to an air conditioning terminal control method and an air conditioning unit. Background Art

[0002] In mine operations, due to the unique underground environment, heat hazards are particularly prominent, severely impacting worker productivity and health and safety. Therefore, the cooling performance of mine air conditioning systems is directly related to mine production efficiency and worker comfort. Existing centralized cooling solutions for mine air conditioning use multiple modular cabinets connected in series to meet a wide range of cooling needs. However, this approach faces numerous challenges in practical application. For example, in actual use, mine air conditioning requires varying load capacities in different scenarios, and existing mine air conditioning systems are unable to control the operation of modular cabinets based on the actual load conditions. In mine air conditioning systems, water pumps are key fluid transport equipment, and their operating characteristics directly impact the cooling performance of the entire system. When the load increases, conventional water pumps cannot provide sufficient flow to meet cooling requirements. When the load decreases, the pumps generate excessive pressure differentials, resulting in energy waste and system instability. When the system load fluctuates, the pump's flow rate and pressure differential often struggle to achieve an ideal match. This mismatch between flow rate and pressure differential results in high energy consumption in conventional mine air conditioning systems, increasing operating costs. At the same time, frequent adjustments and maintenance also increase the complexity and maintenance costs of the system. Summary of the Invention

[0003] In order to solve the technical problem of mismatch between flow rate and pressure difference of the water pump in the prior art, the present invention proposes an air-conditioning terminal control method and an air-conditioning unit.

[0004] The technical solution adopted in the present invention is:

[0005] The present invention proposes a method for controlling an air-conditioning terminal, wherein a plurality of air-conditioning terminals are connected through a main pipeline, and each air-conditioning terminal is provided with a bipolar hydraulic fan, comprising the following steps:

[0006] The bipolar hydraulic fan at each air-conditioning terminal in operation is adjusted in a preset order. The adjustment of the bipolar hydraulic fan at each air-conditioning terminal is specifically as follows: the pressure difference and flow of the bipolar hydraulic fan are detected, and the bipolar hydraulic fan controls the driving impeller of the bipolar hydraulic fan to operate in series or parallel or in single stage according to the detected flow and pressure difference.

[0007] Furthermore, the bipolar hydraulic fan controls the driving wheels of the bipolar hydraulic fan to operate in series and parallel or in single stage according to the detected flow rate and pressure difference, comprising the steps of:

[0008] If the flow rate of the bipolar hydraulic fan is greater than the preset flow rate of the current bipolar hydraulic fan, the driving wheels of the bipolar hydraulic fan are controlled to be connected in parallel.

[0009] Furthermore, the bipolar hydraulic fan controls the driving wheels of the bipolar hydraulic fan to operate in series and parallel or in single stage according to the detected flow rate and pressure difference, and further comprises the steps of:

[0010] If the flow rate of the bipolar hydraulic fan is less than or equal to the preset flow rate of the current bipolar hydraulic fan, and the pressure difference of the bipolar hydraulic fan is greater than the preset pressure difference of the current bipolar hydraulic fan, the driving wheels of the bipolar hydraulic fan are controlled to be connected in series;

[0011] If the flow rate of the bipolar hydraulic fan is less than or equal to the preset flow rate of the current bipolar hydraulic fan, and the pressure difference of the bipolar hydraulic fan is less than or equal to the preset pressure difference of the current bipolar hydraulic fan, the driving wheel of the bipolar hydraulic fan operates in a single-pole manner.

[0012] Furthermore, before adjusting the bipolar hydraulic fans of each air-conditioning terminal in operation according to a preset sequence, the method further includes the following steps:

[0013] Obtain the supply air temperature of the air conditioning system and adjust the frequency of the water pump on the main pipeline according to the supply air temperature of the air conditioning system.

[0014] Furthermore, the frequency of the water pump on the main pipeline is adjusted according to the air supply temperature of the air conditioning system, comprising the steps of:

[0015] If the current air supply temperature of the air conditioning system is greater than the preset air supply temperature of the air conditioning system, the frequency of the water pump on the main pipeline is increased until the air supply temperature of the air conditioning system is equal to the preset air supply temperature of the air conditioning system;

[0016] If the current air supply temperature of the air conditioning system is lower than the preset air supply temperature of the air conditioning system, the frequency of the water pump on the main pipeline is reduced until the current air supply temperature of the air conditioning system is equal to the preset air supply temperature of the air conditioning system.

[0017] Furthermore, after adjusting the frequency of the water pump on the main pipeline according to the air supply temperature of the air conditioning system, the method further includes the following steps:

[0018] Get the return air temperature of the air conditioning system;

[0019] The air conditioning terminal is controlled to open or close according to the return air temperature of the air conditioning system.

[0020] Furthermore, the control of turning on or off the air conditioning terminal according to the return air temperature of the air conditioning system includes the following steps:

[0021] The return air temperature of the air conditioning system is greater than the preset return air temperature of the air conditioning terminal, and the air conditioning terminal is turned on;

[0022] If the return air temperature of the air conditioning system is less than or equal to the preset return air temperature of the air conditioning terminal, the air conditioning terminal will be closed.

[0023] The present invention also provides an air-conditioning unit, comprising a plurality of the aforementioned air-conditioning terminals.

[0024] Furthermore, the two driving rotors of the bipolar hydraulic fan at the air-conditioning terminal are respectively: a first driving rotor and a second driving rotor, the water inlet end of the first driving rotor is connected to the main pipeline through a first water inlet pipeline, the water inlet end of the second driving rotor is connected to the main pipeline through a second water inlet pipeline, and the first water inlet pipeline is provided with a first switch valve;

[0025] The water outlet end of the first driving wheel is connected to the main pipeline through a first water outlet pipeline, and the second driving wheel is connected to the main pipeline through a second water outlet pipeline. A second switch valve is provided on the second water outlet pipeline.

[0026] The water outlet end of the second driving wheel is communicated with the water inlet end of the first driving wheel through a third water outlet pipe, and a third switch valve is provided on the third water outlet pipe.

[0027] Furthermore, multiple air-conditioning terminals are connected in series through the main pipeline, and the main pipeline is also connected to a bypass pipeline in parallel with each air-conditioning terminal. The water inlet or outlet of the air-conditioning terminal is provided with a switch valve, and the bypass valve is provided on the bypass pipeline.

[0028] Compared to existing technologies, the present invention proposes an air conditioning terminal control method. Multiple air conditioning terminals are connected through a main pipeline. By detecting the pressure differential and flow rate of the bipolar hydraulic fans, the bipolar hydraulic fans are controlled to operate in series or parallel or single-stage mode based on the detected flow rate and pressure differential. Parallel operation is used to increase flow when there is excess flow, while series operation is used to reduce the pressure differential when the pressure differential is excessive, thereby achieving efficient and stable system operation. This solves the technical problem of mismatch between flow rate and pressure differential in water pumps in existing technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic diagram of a flow chart of an embodiment of the present invention;

[0031] Figure 2 Schematic diagram of parallel connection of driving wheels of a bipolar hydraulic blower according to an embodiment of the present invention;

[0032] Figure 3 Schematic diagram of the series connection of driving rotors of a bipolar hydraulic blower according to an embodiment of the present invention;

[0033] Figure 4 Schematic diagram of the single-pole operation of the driving wheel of the bipolar hydraulic blower according to an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of connecting multiple air-conditioning terminals according to an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the connection of multiple air-conditioning terminal drive wheels according to an embodiment of the present invention;

[0036] 1. First drive wheel; 2. Second drive wheel; 3. First switch valve; 4. Second switch valve; 5. Third switch valve; 6. Water pump; 7. Bypass valve. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0039] In mine operations, due to the unique underground environment, heat hazards are particularly prominent, severely impacting worker productivity and health and safety. Therefore, the cooling performance of mine air conditioning systems is directly related to mine production efficiency and worker comfort. Existing centralized cooling solutions for mine air conditioning use multiple modular cabinets connected in series to meet a wide range of cooling needs. However, this approach faces numerous challenges in practical application. For example, in actual use, mine air conditioning requires varying load capacities in different scenarios, and existing mine air conditioning systems are unable to control the operation of modular cabinets based on the actual load conditions. In mine air conditioning systems, water pumps are key fluid transport equipment, and their operating characteristics directly impact the cooling performance of the entire system. When the load increases, conventional water pumps cannot provide sufficient flow to meet cooling requirements. When the load decreases, the pumps generate excessive pressure differentials, resulting in energy waste and system instability. When the system load fluctuates, the pump's flow rate and pressure differential often struggle to achieve an ideal match. This mismatch between flow rate and pressure differential results in high energy consumption in conventional mine air conditioning systems, increasing operating costs. At the same time, frequent adjustments and maintenance also increase the complexity and maintenance costs of the system.

[0040] like Figure 1-6 As shown, the present invention proposes a method for controlling an air conditioning terminal. Multiple air conditioning terminals are connected through a main pipeline. Each air conditioning terminal is equipped with a bipolar hydraulic fan. The bipolar hydraulic fan of each air conditioning terminal in operation is adjusted according to a preset sequence. The adjustment of the bipolar hydraulic fan of each air conditioning terminal is specifically as follows:

[0041] The pressure difference and flow of the bipolar hydraulic fan are detected, and the driving wheels of the bipolar hydraulic fan are controlled to operate in series or parallel or in single stage according to the detected flow and pressure difference.

[0042] Specifically, this solution controls multiple air-conditioning terminals, which are connected through a main pipeline. In this embodiment, the connection relationship between the multiple air-conditioning terminals is series. Each air-conditioning terminal is provided with a bipolar hydraulic fan, and the bipolar hydraulic fan is provided with two drive rotors for driving the blades of the bipolar hydraulic fan to rotate. The bipolar hydraulic fan of each air-conditioning terminal in operation is adjusted according to a preset sequence. The sequence can be selected according to actual conditions. In this embodiment, the sequence is adjusted sequentially according to the installation orientation. For example, the pressure difference and flow of the bipolar hydraulic fan of the first air-conditioning terminal are detected. The bipolar hydraulic fan of the first air-conditioning terminal controls the drive rotor to operate in series and parallel or in single stage according to the detected flow and pressure difference. Then the second air-conditioning terminal is adjusted, and the adjustment is repeated for each air-conditioning terminal.

[0043] In a further embodiment, the bipolar hydraulic fan controls the driving wheels of the bipolar hydraulic fan to operate in series or parallel or in single stage according to the detected flow rate and pressure difference, comprising the steps of:

[0044] If the flow rate of the bipolar hydraulic fan is greater than the preset flow rate of the current bipolar hydraulic fan, the driving runners of the bipolar hydraulic fan are connected in parallel;

[0045] If the flow rate of the bipolar hydraulic fan is less than or equal to the preset flow rate of the current bipolar hydraulic fan, and the pressure difference of the bipolar hydraulic fan is greater than the preset pressure difference of the current bipolar hydraulic fan, the driving wheels of the bipolar hydraulic fan are connected in series;

[0046] If the flow rate of the bipolar hydraulic fan is less than or equal to the preset flow rate of the current bipolar hydraulic fan, and the pressure difference of the bipolar hydraulic fan is less than or equal to the preset pressure difference of the current bipolar hydraulic fan, the driving wheel of the bipolar hydraulic fan operates in a single-pole manner.

[0047] Specifically, if the flow rate of the bipolar hydraulic fan is greater than the currently set preset flow rate, the two drive impellers of the bipolar hydraulic fan will operate in parallel. Parallel operation generally means that the two drive impellers work simultaneously, which will split the flow rate of the bipolar hydraulic fan, reducing the flow rate of the hydraulic fan to match the preset flow rate.

[0048] If the flow rate is less than or equal to the preset value and the pressure difference is greater than the preset value, the two drive impellers of the bipolar hydraulic fan will operate in series. Series operation means that the two drive impellers are connected in series. The original water flow pressure will be reduced after passing through one of the drive impellers, and then pass through the other drive impeller, thereby dispersing the pressure of the bipolar hydraulic fan.

[0049] If both the flow rate and pressure differential are less than or equal to the preset values, the fan will operate in unipolar mode. This means that only one drive rotor is operating, and all flow and pressure differential are directed to that drive rotor to meet the preset pressure differential and flow rate for the bipolar hydraulic fan.

[0050] Through such control logic, the air-conditioning terminal can dynamically adjust the operation mode of the bipolar hydraulic fan according to the actual flow and pressure difference requirements to achieve more efficient and energy-saving operation.

[0051] like Figure 1 As shown, in a further embodiment, before adjusting the bipolar hydraulic fan of each air-conditioning terminal in operation according to a preset order, the following steps are also included:

[0052] Get the return air temperature of the air conditioning system;

[0053] Control the air conditioning terminal to open or close according to the return air temperature of the air conditioning system.

[0054] Specifically, the system first needs to obtain the return air temperature of the air conditioning system—the temperature of the air drawn from the outside environment by the air conditioner terminal. This temperature is an important basis for determining the actual temperature conditions outside. Once the return air temperature is obtained, the system uses this temperature to determine whether to turn the air conditioner terminal on or off.

[0055] In a further embodiment, the controlling of turning on or off the air conditioning terminal according to the return air temperature of the air conditioning system comprises the steps of:

[0056] The return air temperature of the air conditioning system is greater than the preset return air temperature of the air conditioning terminal, and the air conditioning terminal is turned on;

[0057] If the return air temperature of the air conditioning system is less than or equal to the preset return air temperature of the air conditioning terminal, the air conditioning terminal will be closed.

[0058] Specifically, if the return air temperature from the air conditioning system is greater than the preset return air temperature of the air conditioning terminal, this means that the actual temperature inside the mine is higher than the desired comfort range. To lower the temperature, the system will decide to open the air conditioning terminal, allowing cold / hot air to enter the mine to regulate the temperature. Conversely, if the return air temperature from the air conditioning system is less than or equal to the preset return air temperature of the air conditioning terminal, this means that the actual temperature inside the mine is already within the desired comfort range, or even lower. To save energy and avoid unnecessary cooling / heating, the system will decide to close the air conditioning terminal, stopping the supply of cold / hot air into the mine.

[0059] In this embodiment, the preset return air temperature for each air conditioning terminal can be different. For example, there are two air conditioning terminals, the first with a preset return air temperature of 30 degrees Celsius, and the second with a preset return air temperature of 40 degrees Celsius. The current return air temperature of the air conditioning system is 35 degrees Celsius. When the first air conditioning terminal determines that 35 degrees Celsius is greater than 30 degrees Celsius, the system will turn on the first air conditioning terminal to cool the air. When the second air conditioning terminal determines that the current return air temperature of the air conditioning system is 38 degrees Celsius, which is less than 40 degrees Celsius, the current temperature is within the desired comfortable temperature range, and the current air conditioning terminal will be turned off. The air conditioning system temperature is adjusted and changed based on the air conditioning terminal.

[0060] In a further embodiment, before adjusting the bipolar hydraulic blower of each air-conditioning terminal in operation according to a preset sequence, the method further includes the following steps:

[0061] Obtain the supply air temperature of the air conditioning system and adjust the frequency of the water pump on the main pipeline according to the supply air temperature of the air conditioning system.

[0062] If the current air supply temperature of the air conditioning system is greater than the preset air supply temperature of the air conditioning system, the frequency of the water pump 6 on the main pipeline is increased until the air supply temperature of the air conditioning system is equal to the preset air supply temperature of the air conditioning system;

[0063] If the current air supply temperature of the air conditioning system is lower than the preset air supply temperature of the air conditioning system, the frequency of the water pump 6 on the main pipeline is reduced until the current air supply temperature of the air conditioning system is equal to the preset air supply temperature of the air conditioning system.

[0064] Specifically, if the current supply air temperature of the air conditioning system is greater than the preset supply air temperature of the air conditioning system, this means that the air sent by the air conditioning system is too hot and the temperature needs to be lowered. To achieve this, the system will increase the frequency of the water pump 6 on the main pipeline. The increase in the frequency of the water pump 6 will increase the water flow rate, thereby taking away more heat and lowering the supply air temperature until the supply air temperature is equal to the preset supply air temperature. On the contrary, if the current supply air temperature of the air conditioning system is less than the preset supply air temperature of the air conditioning system, this means that the air sent by the air conditioning system is too cold and the temperature needs to be increased. To achieve this, the system will reduce the frequency of the water pump 6 on the main pipeline. The reduction in the frequency of the water pump 6 will reduce the water flow rate, thereby reducing the heat taken away and increasing the supply air temperature until the supply air temperature is equal to the preset supply air temperature. The purpose of this step is to ensure that the supply air temperature of the air conditioning system remains within the set comfort range to achieve more efficient and energy-saving operation.

[0065] like Figure 2-6 As shown, the present invention further proposes an air-conditioning unit, comprising a plurality of air-conditioning terminals using the air-conditioning terminal control method of the present invention.

[0066] The bipolar hydraulic fan at the air conditioner terminal is housed within the terminal housing. The water inlet and outlet of both drive rotors are connected to the main pipeline, and the pipes connecting the water inlet and outlet of the two drive rotors to the main pipeline are each equipped with an on / off valve. The outlet of one drive rotor is also connected to the water inlet of the other drive rotor, and this connection is also equipped with an on / off valve.

[0067] Specifically, the two drive wheels are a first drive wheel 1 and a second drive wheel 2. The water inlet of the first drive wheel 1 is connected to the main pipeline via a first water inlet pipe, and the water inlet of the second drive wheel 2 is connected to the main pipeline via a second water inlet pipe. The first water inlet pipe is equipped with a first on-off valve 3. The water outlet of the first drive wheel 1 is connected to the main pipeline via a first water outlet pipe, and the water outlet of the second drive wheel 2 is connected to the main pipeline via a second water outlet pipe. The second water outlet pipe is equipped with a second on-off valve 4. The water outlet of the second drive wheel 2 is connected to the water inlet of the first drive wheel 1 via a third water outlet pipe, and the third water outlet pipe is equipped with a third on-off valve 5.

[0068] The first switch valve 3 is open, the second switch valve 4 is open, the third switch valve 5 is closed, and the two driving wheels are connected in parallel;

[0069] The first switch valve 3 is open, the second switch valve 4 is closed, the third switch valve 5 is open, and the two driving wheels are connected in series;

[0070] The first switch valve 3 is closed, the second switch valve 4 is open, and the third switch valve 5 is closed, so that only the second driving wheel 2 works in a single-pole mode;

[0071] In a further embodiment, multiple air-conditioning terminals are connected in series through the main pipeline, and a bypass pipeline connected in parallel with each air-conditioning terminal is also connected to the main pipeline. The water inlet or outlet of the air-conditioning terminal is provided with a switch valve, and the bypass pipeline is provided with a bypass valve 7 to ensure that when one air-conditioning terminal is closed, the other air-conditioning terminals can still operate normally. When one of the air-conditioning terminals stops running, the other air-conditioning terminals that are also connected in series with the main pipeline are connected to the main pipeline through the bypass pipeline and continue to operate.

[0072] In a further embodiment, the heat exchanger at the air conditioner terminal is connected to the main pipeline, and an on-off valve is installed on the connecting pipeline. The water inlet and outlet of the drive wheel are connected to the heat exchanger. The pipeline connecting the main pipeline and the water inlet of the heat exchanger is equipped with an on-off valve. The on-off valve is opened and closed to control whether the heat exchanger is connected to the main pipeline, thereby controlling whether the air conditioner terminal is turned on or off.

[0073] When the drive impeller of a bipolar hydraulic fan is connected in parallel instead of single stage, the fan can flow more at the same pressure differential. When the drive impeller of a bipolar hydraulic fan is connected in series instead of single stage, the fan can lose more pressure differential at the same flow. Therefore, when there is excess flow, the drive impellers of the bipolar hydraulic fan should be connected in parallel, and when there is excess pressure differential, the drive impellers of the bipolar hydraulic fan should be connected in series. Since excess flow is more common underground, it is necessary to first determine whether there is excess flow, and then determine whether there is excess pressure differential. When there is no excess flow or pressure differential, the drive impeller of the hydraulic fan maintains single-stage operation.

[0074] The specific control process of the present invention is as follows:

[0075] At the beginning of each control, it is judged whether the supply air temperature is equal to the preset supply air temperature. If not, it indicates that the load supply does not match and the frequency of water pump 6 needs to be adjusted. If the supply air temperature is greater than the set supply air temperature, it indicates that the load supply is low and the frequency of water pump 6 needs to be increased. If the supply air temperature is less than the set supply air temperature, it indicates that the load supply is high and the frequency of water pump 6 needs to be reduced. After the adjustment of water pump 6 is completed, the air conditioning terminal is adjusted.

[0076] Starting from the first air-conditioning terminal, the judgment is made to determine whether the return air temperature is equal to the preset return air temperature. (Note: the return air temperature here is the return air temperature of the entire air-conditioning system. The return air temperature is the same for different air-conditioning terminals. The preset return air temperature here is set to different values ​​for different air-conditioning terminals). The preset return air temperature is usually between 25 and 40°C. If it is not equal, it means that the load demand does not match and the number of air-conditioning terminals needs to be adjusted. If the current return air temperature is greater than the preset return air temperature, it indicates that the load demand is large and the number of air-conditioning terminals needs to be increased. In this case, the air-conditioning terminal starts to run. If the air-conditioning terminal is already in operation, it remains in operation. If the return air temperature is less than the preset return air temperature, then conversely, the air-conditioning terminal is shut down. If the air-conditioning terminal is already in the closed state, it remains closed and directly enters the next air-conditioning terminal for judgment. If the return air temperature is equal to the set return air temperature, it indicates that the demand is met and the flow and pressure difference are adjusted.

[0077] Determine whether the flow rate is greater than the preset flow rate. The preset flow rate is usually 20% to 80% of the rated flow rate of the water pump 6. If it is greater than, it indicates that there is excess flow, and the driving impellers of the bipolar hydraulic fan should run in parallel. If it is less than or equal to, it indicates that there is no excess flow. Then determine whether the pressure difference is greater than the preset pressure difference. The preset pressure difference is generally 20% to 80% of the pressure difference corresponding to the rated head of the water pump. If it is greater than, it indicates that there is excess pressure difference, and the driving impellers of the bipolar hydraulic fan run in series. If it is not greater than, it indicates that there is neither excess flow nor excess pressure difference, and the hydraulic fan has only one driving impeller running; if the currently adjusted air-conditioning terminal is the last one, then end this adjustment. If it is not the last one, adjust the next air-conditioning terminal until all air-conditioning terminals are adjusted.

[0078] Compared to existing technologies, the present invention proposes an air conditioning terminal control method. Multiple air conditioning terminals are connected through a main pipeline. By detecting the pressure differential and flow rate of the bipolar hydraulic fans, the bipolar hydraulic fans are controlled to operate in series or parallel or single-stage mode based on the detected flow rate and pressure differential. Parallel operation is used to increase flow when there is excess flow, while series operation is used to reduce the pressure differential when the pressure differential is excessive, thereby achieving efficient and stable system operation. This solves the technical problem of mismatch between flow rate and pressure differential in water pumps in existing technologies.

[0079] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0080] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0081] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0082] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0083] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0084] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A method for controlling an air conditioning terminal, wherein a plurality of air conditioning terminals are connected through a main pipeline, and each air conditioning terminal is provided with a bipolar hydraulic fan, characterized in that: Including steps: Adjusting the bipolar hydraulic fan at each air-conditioning terminal in operation according to a preset sequence. The adjustment of the bipolar hydraulic fan at each air-conditioning terminal is specifically as follows: detecting the pressure difference and flow of the bipolar hydraulic fan, and controlling the two driving runners of the bipolar hydraulic fan to operate in series and parallel or in single stage according to the detected flow and pressure difference; The bipolar hydraulic fan controls the driving wheels of the bipolar hydraulic fan to operate in series and parallel or in single stage according to the detected flow rate and pressure difference, comprising the steps of: If the flow rate of the bipolar hydraulic fan is greater than the preset flow rate of the current bipolar hydraulic fan, the driving wheels of the bipolar hydraulic fan are controlled to be connected in parallel; If the flow rate of the bipolar hydraulic fan is less than or equal to the preset flow rate of the current bipolar hydraulic fan, and the pressure difference of the bipolar hydraulic fan is greater than the preset pressure difference of the current bipolar hydraulic fan, the driving wheels of the bipolar hydraulic fan are controlled to be connected in series; If the flow rate of the bipolar hydraulic fan is less than or equal to the preset flow rate of the current bipolar hydraulic fan, and the pressure difference of the bipolar hydraulic fan is less than or equal to the preset pressure difference of the current bipolar hydraulic fan, the driving wheel of the bipolar hydraulic fan operates in a single-pole manner.

2. The air conditioner terminal control method according to claim 1, characterized in that: Before adjusting the bipolar hydraulic fans of each air-conditioning terminal in operation according to a preset sequence, the method further includes the following steps: Obtain the supply air temperature of the air conditioning system and adjust the frequency of the water pump on the main pipeline according to the supply air temperature of the air conditioning system.

3. The air conditioner terminal control method according to claim 2, characterized in that: The method of adjusting the frequency of the water pump on the main pipeline according to the air supply temperature of the air conditioning system comprises the following steps: If the current air supply temperature of the air conditioning system is greater than the preset air supply temperature of the air conditioning system, the frequency of the water pump on the main pipeline is increased until the air supply temperature of the air conditioning system is equal to the preset air supply temperature of the air conditioning system; If the current air supply temperature of the air conditioning system is lower than the preset air supply temperature of the air conditioning system, the frequency of the water pump on the main pipeline is reduced until the current air supply temperature of the air conditioning system is equal to the preset air supply temperature of the air conditioning system.

4. The air conditioner terminal control method according to claim 2, characterized in that: After adjusting the frequency of the water pump on the main pipeline according to the air supply temperature of the air conditioning system, the following steps are also included: Get the return air temperature of the air conditioning system; The air conditioning terminal is controlled to open or close according to the return air temperature of the air conditioning system.

5. The air conditioner terminal control method according to claim 4, characterized in that: The method of controlling the air conditioning terminal to be turned on or off according to the return air temperature of the air conditioning system comprises the following steps: The return air temperature of the air conditioning system is greater than the preset return air temperature of the air conditioning terminal, and the air conditioning terminal is turned on; If the return air temperature of the air conditioning system is less than or equal to the preset return air temperature of the air conditioning terminal, the air conditioning terminal will be closed.

6. An air conditioning unit, characterized in that: Use the air conditioning terminal control method as described in any one of claims 1 to 5.

7. The air conditioning unit according to claim 6, characterized in that: The two driving wheels of the bipolar hydraulic fan at the air conditioner terminal are respectively: a first driving wheel and a second driving wheel, the water inlet end of the first driving wheel is connected to the main pipeline through a first water inlet pipe, and the water inlet end of the second driving wheel is connected to the main pipeline through a second water inlet pipe, and the first water inlet pipe is provided with a first switch valve; The water outlet end of the first driving wheel is connected to the main pipeline through a first water outlet pipeline, and the second driving wheel is connected to the main pipeline through a second water outlet pipeline. A second switch valve is provided on the second water outlet pipeline. The water outlet end of the second driving wheel is communicated with the water inlet end of the first driving wheel through a third water outlet pipe, and a third switch valve is provided on the third water outlet pipe.

8. The air conditioning unit according to claim 7, characterized in that: Multiple air-conditioning terminals are connected in series through the main pipeline, and the main pipeline is also connected to a bypass pipeline in parallel with each air-conditioning terminal. The water inlet or outlet of the air-conditioning terminal is provided with a switch valve, and the bypass valve is provided on the bypass pipeline.

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