Air conditioning unit, air conditioning unit control method and device

Abstract

The present invention discloses an air conditioning unit, an air conditioning unit control method, and an air conditioning unit control device. The air conditioning unit includes at least two independent refrigerant systems, each of which includes a first heat exchanger and a second heat exchanger. The first heat exchangers of each refrigerant system are arranged in sequence along the air supply direction in an air supply duct. The first heat exchanger is provided with a rotating mechanism, which rotates the first heat exchanger to control whether the air supply flows through the first heat exchanger; and / or, a shielding mechanism is provided on the air inlet side of the second heat exchanger, which is used to control whether air is allowed to flow through the second heat exchanger. The present invention can reduce the air supply resistance, reduce the power of the blower, increase the condensing air volume of the opened refrigerant system, reduce the condensing temperature, and improve the performance of the entire unit according to the actual operating requirements of the unit.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to an air conditioner unit, and an air conditioner unit control method and device. Background Art

[0002] As an important component in air-cooled refrigeration systems, fans can be divided into two types: supply fans and condensing fans. The former are mostly centrifugal fans used for air supply, while the latter are mostly axial fans used for condenser heat dissipation.

[0003] A refrigeration device with multiple independent systems connected in series includes multiple condensing fans. For example, an air-cooled aircraft ground air conditioner includes a four-stage refrigerant system. Each refrigerant system includes a refrigerant circulation loop composed of a compressor, condenser, throttling element and evaporator connected in sequence. Each refrigerant system includes at least one condensing fan, which drives air to exchange heat with the refrigerant in the condenser of this system. A blower is installed in the air supply duct of the aircraft ground air conditioner. The evaporators of each system are arranged in sequence in the air supply direction in the air supply duct. The blower drives air into the unit and flows through the evaporators of each system step by step to exchange heat with the refrigerant in the evaporator.

[0004] When operating at full load, the supply air passes through the evaporator of each system in sequence, gradually reducing the temperature. However, environmental conditions vary greatly from region to region, and cooling capacity requirements vary from season to season. Often, the unit is not operating at full load. In this case, shutting down some systems can still achieve the target temperature and air volume. For refrigerant systems that are not running, the continued operation of other fans will also cause some air to flow in from these refrigerant systems, reducing the condensing air volume of the running refrigerant systems. Furthermore, no heat exchange occurs when the supply air passes through the evaporator of this system. However, due to the high static pressure centrifugal fan's high air velocity, the increased air supply resistance will inevitably lead to significant resistance losses and reduce the overall performance of the unit.

[0005] With regard to the problem of how to improve the performance of air-conditioning units in the prior art, no effective solution has been proposed yet. Summary of the Invention

[0006] Embodiments of the present invention provide an air-conditioning unit, and a method and device for controlling the air-conditioning unit, to at least solve the problem of how to improve the performance of the air-conditioning unit in the prior art.

[0007] To solve the above technical problems, an embodiment of the present invention provides an air conditioning unit comprising at least two independent refrigerant systems, each of which comprises a first heat exchanger and a second heat exchanger, wherein the first heat exchangers of each refrigerant system are sequentially arranged in an air supply duct along an air supply direction, and wherein the air conditioning unit is characterized in that:

[0008] The first heat exchanger is provided with a rotating mechanism, and the first heat exchanger is rotated by the rotating mechanism to control whether the supply air flows through the first heat exchanger; and / or,

[0009] A shielding mechanism is provided on the air inlet side of the second heat exchanger, and the shielding mechanism is used to control whether air is allowed to flow through the second heat exchanger.

[0010] Optionally, the rotating mechanism includes:

[0011] a first rotating shaft, mounted to the air supply duct and connected to the first heat exchanger;

[0012] The first driving component is used to drive the first rotating shaft to rotate, thereby driving the first heat exchanger to rotate. When the first heat exchanger rotates to the first position, the supply air does not flow through the first heat exchanger. When the first heat exchanger rotates to the second position, the supply air flows through the first heat exchanger.

[0013] Optionally, the rotating mechanism further includes: a limiting component, provided on the inner wall of the air supply duct, for determining the second position.

[0014] Optionally, the first rotating shaft is connected to a first surface of the first heat exchanger, wherein the first surface is any surface of all surfaces of the first heat exchanger except an air inlet side and an air outlet side.

[0015] Optionally, the shielding mechanism includes:

[0016] a second rotating shaft located on top of the second heat exchanger;

[0017] a second driving component, configured to drive the second rotating shaft to rotate;

[0018] A windshield roller blind has one end disposed on the second rotating shaft. As the second rotating shaft rotates, the windshield roller blind can be extended or retracted to cover or expose the second heat exchanger.

[0019] Optionally, the air conditioning unit further includes: an electric heater for heating, which is arranged in the air supply duct, and the electric heater is provided with a rotating mechanism, and the electric heater is rotated by the rotating mechanism to control whether the air supply flows through the electric heater.

[0020] An embodiment of the present invention further provides an air conditioning unit control method, which is applied to the air conditioning unit described in the embodiment of the present invention. The air conditioning unit control method includes:

[0021] determining an operating mode of the air conditioning unit;

[0022] The rotating mechanism and / or the shielding mechanism are controlled according to the operating mode and the opening status of the refrigerant system.

[0023] Optionally, controlling the rotating mechanism and / or shielding mechanism according to the operating mode and the opening status of the refrigerant system includes:

[0024] If the operating mode is the air supply mode, all rotating mechanisms are controlled to rotate their corresponding first heat exchangers to the first position so that the air supply does not flow through the first heat exchanger, and / or all shielding mechanisms are controlled to maintain the current state unchanged.

[0025] Optionally, controlling the rotating mechanism and / or shielding mechanism according to the operating mode and the opening status of the refrigerant system includes:

[0026] If the operating mode is the cooling mode, determining the refrigerant system that is turned on and the refrigerant system that is not turned on;

[0027] Controlling a rotating mechanism in the opened refrigerant system to rotate the corresponding first heat exchanger to a second position so that the supply air flows through the first heat exchanger, and / or controlling a shielding mechanism in the opened refrigerant system to expose the corresponding second heat exchanger;

[0028] Control the rotating mechanism in the unopened refrigerant system to rotate the corresponding first heat exchanger to the first position so that the supply air does not flow through the first heat exchanger, and / or control the shielding mechanism in the unopened refrigerant system to shield the corresponding second heat exchanger.

[0029] Optionally, if the air conditioning unit includes an electric heater for heating, and the electric heater is provided with a rotating mechanism, the method further includes:

[0030] If the operating mode is the air supply mode or the cooling mode, controlling the rotating mechanism to rotate the electric heater so that the air supply does not flow through the electric heater;

[0031] If the operating mode is the heating mode and heating is performed by the electric heater, the rotating mechanism is controlled to rotate the electric heater so that the supply air flows through the electric heater, and the rotating mechanism and / or the shielding mechanism are controlled in the following manner: all the rotating mechanisms are controlled to rotate their respective corresponding first heat exchangers to the first position so that the supply air does not flow through the first heat exchanger, and / or all the shielding mechanisms are controlled to maintain their current state unchanged.

[0032] Optionally, if at least two heat exchange fans are provided corresponding to each of the second heat exchangers, the above method further includes: for the turned-on refrigerant system, determining a method for increasing the condensing air volume of the refrigerant system based on the current condensing pressure and power information of the refrigerant system.

[0033] Optionally, determining a method for increasing the condensing air volume of the refrigerant system according to current condensing pressure and power information of the refrigerant system includes:

[0034] If the current condensing pressure is greater than or equal to the frequency-limiting pressure, calculating the first power and the second power;

[0035] comparing the first power and the second power;

[0036] Determining a fan adjustment method corresponding to a minimum value of the first power and the second power as a method for increasing the condensing air volume of the refrigerant system;

[0037] Among them, the first power is the total system power required when the current condensing pressure is lower than the frequency-limiting pressure by increasing the frequency of the heat exchange fan, and the second power is the total system power required when the current condensing pressure is lower than the frequency-limiting pressure by increasing the number of heat exchange fans.

[0038] Optionally, determining a method for increasing the condensing air volume of the refrigerant system according to current condensing pressure and power information of the refrigerant system includes:

[0039] If the current condensing pressure is less than the frequency-limiting pressure, calculating the third power and the fourth power;

[0040] determining whether there is a state point such that the third power is greater than the fourth power;

[0041] If so, the method of increasing the frequency of the heat exchange fans and increasing the number of heat exchange fans with the lowest total system power is selected as the method of increasing the condensing air volume of the refrigerant system;

[0042] If it does not exist, the heat exchange fan in the refrigerant system is controlled to maintain the current operating state;

[0043] The third power is the reduction value of the total system power after the condensing air volume is increased, and the fourth power is the fan power required to increase the condensing air volume.

[0044] An embodiment of the present invention further provides an air conditioning unit control device, which is applied to the air conditioning unit described in the embodiment of the present invention. The air conditioning unit control device includes:

[0045] a determination module, configured to determine an operating mode of the air conditioning unit;

[0046] The control module is used to control the rotating mechanism and / or the shielding mechanism according to the operating mode and the opening status of the refrigerant system.

[0047] An embodiment of the present invention further provides a non-volatile computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method described in the embodiment of the present invention are implemented.

[0048] By applying the technical solution of the present invention, the first heat exchanger can be driven to rotate through the rotating mechanism, thereby changing the opening and closing state of the first heat exchanger in the air supply duct. When the first heat exchanger is closed, that is, the air inlet side and the air outlet side of the first heat exchanger are in the air supply direction, the air supply flows through the first heat exchanger. When the first heat exchanger is opened, that is, the air inlet side and the air outlet side of the first heat exchanger are not in the air supply direction, the air supply does not flow through the first heat exchanger. In this way, the opening and closing state of the first heat exchanger can be controlled according to the actual operation requirements of the unit, and the first heat exchanger in the unopened refrigerant system can be shielded so that the air supply does not flow through the first heat exchanger, thereby reducing the air supply resistance, reducing the power of the blower, and improving the performance of the whole machine. ; The shielding mechanism can block or expose the air inlet side of the second heat exchanger, thereby changing the working state of the second heat exchanger. When the windshield curtain is extended to block the air inlet side of the second heat exchanger, the heat exchange air intake cannot pass through the second heat exchanger. When the windshield curtain is contracted to expose the air inlet side of the second heat exchanger, the heat exchange air intake can pass through the second heat exchanger. In this way, the working state of the second heat exchanger can be controlled according to the actual cooling operation requirements of the unit, and the second heat exchanger in the unopened refrigerant system can be shielded, so that the condensing air intake of other refrigerant systems cannot enter through the second heat exchanger, thereby increasing the condensing air volume of the opened refrigerant system, reducing the condensing temperature, and improving the performance of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 is a schematic top view of an air-conditioning unit provided in Embodiment 1 of the present invention;

[0050] Figure 2 is a schematic diagram of a closed state of the first heat exchanger provided by the first embodiment of the present invention;

[0051] Figure 3 is a schematic diagram of the first heat exchanger in an open state provided by the first embodiment of the present invention;

[0052] Figure 4 is a schematic diagram of a second heat exchanger provided in Example 1 of the present invention;

[0053] Figure 5 is a front view schematic diagram of an air-conditioning unit provided in Embodiment 1 of the present invention;

[0054] Figure 6 is another schematic top view of the air-conditioning unit provided in the first embodiment of the present invention;

[0055] Figure 7 is a flow chart of an air-conditioning unit control method provided by Embodiment 2 of the present invention;

[0056] Figure 8 This is a flow chart of heat exchanger state control provided by the third embodiment of the present invention;

[0057] Figure 9 This is a flow chart of fan control provided by the third embodiment of the present invention;

[0058] Description of reference numerals:

[0059] First heat exchanger 1, rotating mechanism 10, first rotating shaft 11, limiting component 12, second heat exchanger 2, shielding mechanism 20, second rotating shaft 21, windproof roller curtain 22, air supply duct 3, air inlet 31, air supply outlet 32, blower 33, heat exchange blower 4, electric heater 5. DETAILED DESCRIPTION

[0060] To make the objectives, technical solutions, and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described are only some, not all, of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0061] It should be noted that the terms "first", "second", etc. in the description, claims, and drawings of the present invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way are interchangeable where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or that are inherent to these processes, methods, products, or apparatus.

[0062] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0063] Example 1

[0064] This embodiment provides an air conditioning unit, which includes at least two independent refrigerant systems, each of which can perform a refrigerant cycle of compression-condensation-throttling-evaporation-compression. Figure 1As shown, each refrigerant system includes a first heat exchanger 1 and a second heat exchanger 2. The first heat exchangers 1 of each refrigerant system are arranged sequentially along the air supply direction within an air supply duct 3. The air supply duct 3 includes an air inlet 31 and an air outlet 32. A blower 33 is provided within the air supply duct 3, which drives air into the air supply duct 3 and flows along the air supply direction, exchanging heat with the refrigerant in each first heat exchanger 1 step by step. Each second heat exchanger 2 is correspondingly provided with at least one heat exchange fan, which drives air as heat exchange inlet air into the corresponding second heat exchanger 2, exchanging heat with the refrigerant in the second heat exchanger 2. This air conditioning unit can be an air conditioning unit with multiple evaporators connected in series at high static pressure, such as aircraft ground air conditioning.

[0065] The first heat exchanger 1 is provided with a rotating mechanism, which is used to rotate the first heat exchanger 1 to control whether the supply air flows through the first heat exchanger; and / or, the air inlet side of the second heat exchanger 2 is provided with a shielding mechanism, which is used to control whether air is allowed to flow through the second heat exchanger 2.

[0066] The following explains them separately.

[0067] (1) Figure 2 and Figure 3 As shown, the first heat exchanger 1 is provided with a rotating mechanism 10 , which is used to rotate the first heat exchanger 1 to control whether the supply air flows through the first heat exchanger 1 .

[0068] The rotating mechanism 10 includes: a first rotating shaft 11 and a first driving component (not shown in the figure). The first rotating shaft 11 is installed to the air supply duct 3 and is connected to the first heat exchanger 1. The first driving component is used to drive the first rotating shaft 11 to rotate, thereby driving the first heat exchanger 1 to rotate. Figure 3 As shown, when the first heat exchanger 1 is rotated to the first position, the supply air does not flow through the first heat exchanger 1, as shown in FIG. Figure 2 As shown in FIG, when the first heat exchanger 1 rotates to the second position, the supply air flows through the first heat exchanger 1. Figure 2 In the figure, the dotted arrow indicates the air supply direction.

[0069] In this embodiment, the rotating mechanism 10 can drive the first heat exchanger 1 to rotate, thereby changing the opening and closing state of the first heat exchanger 1 in the air supply duct 3. When the first heat exchanger 1 is closed, that is, the air inlet side and the air outlet side of the first heat exchanger 1 are in the air supply direction, and the air supply flows through the first heat exchanger 1. When the first heat exchanger 1 is opened, that is, the air inlet side and the air outlet side of the first heat exchanger 1 are not in the air supply direction, the air supply does not flow through the first heat exchanger 1. In this way, the opening and closing state of the first heat exchanger 1 can be controlled according to the actual operation requirements of the unit, and the first heat exchanger 1 in the unopened refrigerant system can be shielded so that the air supply does not flow through the first heat exchanger 1, thereby reducing the air supply resistance, reducing the power of the blower, and improving the performance of the whole machine.

[0070] The first drive component can be a motor directly connected to the first rotating shaft 11. The first drive component can also include a motor and a gear, with the motor connected to the gear, and the gear in contact with the first rotating shaft 11. The motor drives the first rotating shaft 11 to rotate through the gear. The first drive component and the first rotating shaft 11 can simply and reliably control the rotation of the first heat exchanger 1 within the air supply duct 3.

[0071] Specifically, the first rotating shaft 11 is connected to the first surface of the first heat exchanger 1, wherein the first surface is any surface of all surfaces of the first heat exchanger 1 except the air inlet side and the air outlet side, thereby facilitating control of the opening and closing state of the first heat exchanger 1.

[0072] The rotation mechanism 10 may further include a limiting member 12, disposed on the inner wall of the air supply duct 3, for determining the second position, thereby limiting and reinforcing the final position of the first heat exchanger 1. Specifically, the position of the limiting member 12 on the air supply duct 3 does not coincide with the position of the first rotating shaft 11 on the air supply duct 3. The limiting member 12 prevents excessive rotation of the first heat exchanger 1, ensuring sufficient and effective heat exchange between the refrigerant in the first heat exchanger 1 and the supply air.

[0073] by Figure 2 Taking the structure shown as an example, the limiting component 12 can also be set on the top inner wall or the bottom inner wall of the air supply duct 3. Preferably, the limiting component 12 is arranged opposite to the first rotating shaft 11. The first rotating shaft 11 can also be connected to the top surface or the bottom surface of the first heat exchanger 1.

[0074] (2) Figure 4 As shown, a shielding mechanism 20 is provided on the air inlet side of the second heat exchanger 2 , and the shielding mechanism 20 is used to control whether wind is allowed to flow through the second heat exchanger 2 .

[0075] The shielding mechanism 20 includes a second rotating shaft 21, a second drive component (not shown), and a windshield curtain 22. The second rotating shaft 21 is located on top of the second heat exchanger 2. The second drive component is used to rotate the second rotating shaft 21. One end of the windshield curtain 22 is mounted on the second rotating shaft 21. As the second rotating shaft 21 rotates, the windshield curtain 22 can be extended or retracted to shield or expose the second heat exchanger 2. The second drive component can be a motor directly connected to the second rotating shaft 21.

[0076] In this embodiment, the shielding mechanism 20 can shield or expose the air inlet side of the second heat exchanger 2, thereby changing the working state of the second heat exchanger 2. When the windshield curtain 22 is extended to shield the air inlet side of the second heat exchanger 2, the heat exchange air intake cannot pass through the second heat exchanger 2. When the windshield curtain 22 is contracted to expose the air inlet side of the second heat exchanger 2, the heat exchange air intake can pass through the second heat exchanger 2. In this way, the working state of the second heat exchanger 2 can be controlled according to the actual cooling operation requirements of the unit, and the second heat exchanger 2 in the unopened refrigerant system can be shielded, so that the condensing air intake of other refrigerant systems cannot enter through the second heat exchanger 2, thereby increasing the condensing air volume of the opened refrigerant system, reducing the condensing temperature, and improving the performance of the entire machine.

[0077] like Figure 5 As shown, it is a front view of the air-conditioning unit. The second heat exchanger 2 is correspondingly provided with a heat exchange fan 4. When the wind-shielding roller curtain 22 is extended to block the air inlet side of the second heat exchanger 2, the condensing air intake driven by the heat exchange fan 4 of other refrigerant systems cannot pass through the second heat exchanger 2. When the wind-shielding roller curtain 22 is contracted to expose the air inlet side of the second heat exchanger 2, the condensing air intake driven by the heat exchange fan 4 of other refrigerant systems can pass through the second heat exchanger 2.

[0078] (3) The first heat exchanger 1 is provided with a rotating mechanism 10, which is used to rotate the first heat exchanger 1 to control whether the supply air flows through the first heat exchanger 1. At the same time, a shielding mechanism 20 is provided on the air inlet side of the second heat exchanger 2, and the shielding mechanism 20 is used to control whether air is allowed to flow through the second heat exchanger 2.

[0079] In this embodiment, the rotating mechanism 10 can drive the first heat exchanger 1 to rotate, changing the opening and closing state of the first heat exchanger 1 in the air supply duct 3, so that the supply air flows through or does not flow through the first heat exchanger 1. At the same time, the shielding mechanism 20 can block or expose the air inlet side of the second heat exchanger 2, changing the working state of the second heat exchanger 2, so that the condensing air intake passes through or cannot pass through the second heat exchanger 2. In this way, the opening and closing state of the first heat exchanger 1 and the working state of the second heat exchanger 2 can be controlled according to the actual operation requirements of the unit, and the first heat exchanger 1 and the second heat exchanger 2 in the unopened refrigerant system are shielded, so that the supply air does not flow through the first heat exchanger 1 and the condensing air intake of other refrigerant systems cannot enter through the second heat exchanger 2, thereby reducing the air supply resistance, reducing the power of the blower, increasing the condensing air volume of the opened refrigerant system, and reducing the condensing temperature, which can better improve the performance of the entire machine.

[0080] like Figure 6As shown, the air conditioning unit may further include an electric heater 5 for heating, disposed within the air supply duct 3. Similar to the first heat exchanger 1, the electric heater 5 is provided with a rotation mechanism that rotates the electric heater 5 to control whether the supply air flows through the electric heater 5. The rotation mechanism has the same structure and principle as the rotating mechanism 10 described above. When the electric heater is rotated to the first position, the supply air does not flow through the electric heater. When the electric heater is rotated to the second position, the supply air flows through the electric heater. This will not be further described. This embodiment can drive the electric heater 5 to rotate through the rotating mechanism, thereby changing the opening and closing state of the electric heater 5 in the air supply duct 3. When the electric heater 5 is turned off, that is, the air inlet side and the air outlet side of the electric heater 5 are in the air supply direction, the air flows through the electric heater 5. When the electric heater 5 is turned on, that is, the air inlet side and the air outlet side of the electric heater 5 are not in the air supply direction, the air does not flow through the electric heater 5. In this way, the opening and closing state of the electric heater 5 can be controlled according to the actual operation requirements of the unit. When heating is not required, the electric heater 5 is shielded so that the air does not flow through the electric heater 5, thereby reducing the air supply resistance, reducing the power of the blower, and improving the performance of the whole machine.

[0081] Example 2

[0082] This embodiment provides an air conditioning unit control method, which is applied to the air conditioning unit described in the above embodiment. Figure 7 is a flow chart of the air conditioning unit control method provided by the second embodiment of the present invention, such as Figure 7 As shown, the method includes the following steps:

[0083] S701: Determine the operating mode of the air conditioning unit.

[0084] S702: Control the rotating mechanism and / or the shielding mechanism according to the operation mode and the start-up status of the refrigerant system.

[0085] The operating modes of the air conditioning unit include: air supply mode, cooling mode, and heating mode. It should be noted that whether the rotating mechanism, the blocking mechanism, or both are controlled depends on the specific structure of the air conditioning unit. For example, if the air conditioning unit is equipped with only a rotating mechanism, only the rotating mechanism is controlled. If the air conditioning unit is equipped with only a blocking mechanism, only the blocking mechanism is controlled. If the air conditioning unit is equipped with both a rotating mechanism and a blocking mechanism, both the rotating mechanism and the blocking mechanism can be controlled.

[0086] This embodiment controls the rotating mechanism and / or the shielding mechanism according to the operating mode and the opening status of the refrigerant system. It can control the opening and closing status of the first heat exchanger and / or the working status of the second heat exchanger based on the actual operating requirements of the unit, and shield the first heat exchanger and / or the second heat exchanger in the unopened refrigerant system, so that the supply air does not flow through the first heat exchanger and / or the condensing intake air of other refrigerant systems cannot enter through the second heat exchanger, thereby reducing the supply air resistance, reducing the power of the blower, increasing the condensing air volume of the opened refrigerant system, reducing the condensing temperature, and improving the performance of the whole machine.

[0087] The following is a detailed description of "controlling the rotating mechanism and / or shielding mechanism according to the operating mode and the activation status of the refrigerant system."

[0088] (1) If the operating mode is the air supply mode, all rotating mechanisms are controlled to rotate their corresponding first heat exchangers to the first position so that the air supply does not flow through the first heat exchanger, and / or all shielding mechanisms are controlled to maintain their current state unchanged.

[0089] In air supply mode, the refrigerant systems are deactivated, and no refrigerant flows through the first and second heat exchangers, requiring no heat exchange. This prevents air from flowing through the first heat exchanger, significantly reducing air supply resistance. Furthermore, air supply mode does not involve adjusting the condensing air volume. Whether the second heat exchanger is covered or exposed does not affect unit performance in air supply mode, so the shielding mechanism can remain in its current state.

[0090] (2) If the operating mode is cooling mode, determine the refrigerant system that is turned on and the refrigerant system that is not turned on;

[0091] Controlling a rotating mechanism in the opened refrigerant system to rotate the corresponding first heat exchanger to a second position so that the supply air flows through the first heat exchanger, and / or controlling a shielding mechanism in the opened refrigerant system to expose the corresponding second heat exchanger;

[0092] Control the rotating mechanism in the unopened refrigerant system to rotate the corresponding first heat exchanger to the first position so that the supply air does not flow through the first heat exchanger, and / or control the shielding mechanism in the unopened refrigerant system to shield the corresponding second heat exchanger.

[0093] In cooling mode, for the unopened refrigerant system, the supply air does not flow through the first heat exchanger of the system, which can reduce the supply air resistance; and the second heat exchanger of the system is blocked to prevent the condensed intake air of the opened refrigerant system from flowing through the second heat exchanger of the unopened system and causing air volume loss, thereby improving the performance of the entire machine.

[0094] (3) The air conditioning unit includes an electric heater for heating, and the electric heater is provided with a rotating mechanism.

[0095] If the operating mode is heating mode and heating is performed by an electric heater, the rotating mechanism is controlled to rotate the electric heater so that the supply air flows through the electric heater, and the rotating mechanism and / or the shielding mechanism are controlled in the following manner: all rotating mechanisms are controlled to rotate their respective corresponding first heat exchangers to the first position so that the supply air does not flow through the first heat exchanger, and / or all shielding mechanisms are controlled to maintain their current state unchanged.

[0096] In heating mode, the supply air is heated using an electric heater within the air duct. The refrigerant systems are deactivated, and no refrigerant flows through the first and second heat exchangers, requiring no heat exchange. This operation allows the supply air to flow through the electric heater and not through the first heat exchanger, significantly reducing airflow resistance. Furthermore, heating mode does not involve adjusting the condensing air volume. Whether the second heat exchanger is covered or exposed does not affect unit performance in heating mode, so the shielding mechanism can remain in its current state.

[0097] Furthermore, if the operating mode is air supply mode or cooling mode, the rotation mechanism is controlled to rotate the electric heater so that the air does not flow through the electric heater. In air supply mode or cooling mode, the electric heater does not need to operate, and by preventing the air from flowing through the electric heater, air supply resistance can be reduced.

[0098] Traditional fans are controlled at a fixed frequency and can only be turned on and off. When the external environment and load change, they cannot be effectively adjusted. There are problems such as excessive system high pressure (i.e., condensing pressure) and increased energy consumption. Most existing fan control methods are for single fans and do not consider the performance of the entire machine, making it impossible to obtain the optimal control strategy.

[0099] To address the above issue, in an optional embodiment, if at least two heat exchange fans are provided for each second heat exchanger, in cooling mode, the heat exchange fans function as condensing fans. The above method may further include: for the activated refrigerant system, determining a method for increasing the condensing air volume of the refrigerant system based on the current condensing pressure and power information of the refrigerant system.

[0100] Specifically, according to the current condensing pressure and power information of the refrigerant system, determining a method for increasing the condensing air volume of the refrigerant system includes:

[0101] (1) If the current condensing pressure Ph is greater than or equal to the frequency-limiting pressure Pmax, the first power and the second power are calculated; the first power and the second power are compared; and the fan adjustment method corresponding to the minimum value of the first power and the second power is determined as the method for increasing the condensing air volume of the refrigerant system.

[0102] Among them, the first power is the total system power required when the current condensing pressure is lower than the frequency-limiting pressure by increasing the frequency of the heat exchange fans, and the second power is the total system power required when the current condensing pressure is lower than the frequency-limiting pressure by increasing the number of heat exchange fans.

[0103] When Ph≥Pmax, it means that the condensing heat exchange corresponding to the required capacity of the unit in the current state is insufficient. At this time, in order to ensure the unit capacity, it is necessary to increase the condensing air volume to increase the condensing heat exchange and reduce the condensing pressure. Specifically, the condensing air volume can be increased by increasing the frequency of the heat exchange fan or adding new heat exchange fans (i.e., increasing the number of heat exchange fans). The total system power W1 required to achieve Ph<Pmax by increasing the frequency of the heat exchange fan and the total system power W2 required to achieve Ph<Pmax by increasing the number of heat exchange fans are calculated respectively. The condensing air volume is increased in a way with lower total power. Therefore, under the premise of meeting the demand, the unit performance is optimized by controlling the heat exchange fan corresponding to the second heat exchanger.

[0104] (2) If the current condensing pressure Ph is less than the frequency-limiting pressure Pmax, the third power and the fourth power are calculated; it is determined whether there is a state point that makes the third power greater than the fourth power; if so, the method of increasing the frequency of the heat exchange fan and the method of increasing the number of heat exchange fans to minimize the total system power is selected as the method of increasing the condensing air volume of the refrigerant system; if not, the heat exchange fan in the refrigerant system is controlled to maintain the current operating state.

[0105] Among them, the third power is the reduction value of the total system power after increasing the condensing air volume, and the fourth power is the additional fan power required to increase the condensing air volume.

[0106] When Ph<Pmax, although the frequency limit condition is not reached, lowering the condensing temperature can effectively increase the energy efficiency of the unit. At the same time, the relationship between the benefits of increasing the condensing air volume and power consumption needs to be considered. Two methods of increasing the condensing air volume are calculated based on the current state parameters. Specifically, increasing the condensing air volume reduces the high pressure and thus improves the system performance. From this, the total power reduction value △Wy (i.e., the third power) of the system due to the increase in the condensing air volume can be calculated, and the increased fan power Wf (i.e., the fourth power) due to the increase in the condensing air volume can be calculated. It is determined whether there is a state point such that ΔWy>Wf. If so, it means that the condensing air volume can be increased. The method of increasing the condensing air volume is determined according to the control logic in the previous case of Ph≥Pmax. If it does not exist, it means that the condensing air volume cannot be increased, and the current operating state is maintained. In this way, the performance of the unit can be optimized while meeting the needs.

[0107] For a refrigerant system including at least two condensing fans, this embodiment automatically optimizes and adjusts multiple fans based on the condensing pressure, automatically selecting the best way to increase the condensing air volume, thereby achieving optimal unit performance while meeting demand.

[0108] Example 3

[0109] The air conditioning unit and its control method are described below with reference to a specific embodiment. However, it should be noted that this specific embodiment is only for the purpose of better illustrating the present application and does not constitute an undue limitation on the present application. Explanations of terms that are the same or corresponding to those in the above embodiment will not be repeated in this embodiment.

[0110] by Figure 6 Taking the air-conditioning unit shown as an example, the air-conditioning unit includes four independent refrigerant systems, and the four first heat exchangers 1 are arranged in sequence along the air supply direction in the air supply duct 3, and an electric heater 5 is also provided in the air supply duct 3.

[0111] For refrigerant system x, the first rotating shaft 11 of the rotating mechanism 10 of its first heat exchanger 1 is denoted as Zx. Zx has two operating states: open and closed. Zx closed indicates that the first heat exchanger 1 is connected to the air supply duct 3, that is, the air flows through the first heat exchanger 1; Zx open indicates that the first heat exchanger 1 is not connected to the air supply duct 3, and the air does not flow through the first heat exchanger 1. The second rotating shaft 21 of the shielding mechanism 20 of the second heat exchanger 2 is denoted as Jx. Jx has two operating states: open and closed. Jx closed indicates that the windshield curtain 22 is retracted, at which time the condensing air can pass through the second heat exchanger 2; Jx open indicates that the windshield curtain 22 is lowered, at which time the condensing air cannot pass through the second heat exchanger 2.

[0112] The principle of the rotating shaft R of the rotating mechanism of the electric heater 5 is similar to that of the first rotating shaft 11. When R is closed, it means that the electric heater 5 is connected to the air supply duct 3, that is, the air flows through the electric heater 5; when R is open, it means that the electric heater 5 is not connected to the air supply duct 3, and the air does not flow through the electric heater 5.

[0113] like Figure 8 As shown, the heat exchanger state control includes the following steps:

[0114] S801, determine the operating mode of the unit.

[0115] S802, is it cooling mode? If so, go to S803, if not, go to S806.

[0116] S803: Determine whether refrigerant system n is running. If so, proceed to S804; if not, proceed to S805. The value of n can be any one of 1, 2, 3, and 4.

[0117] S804, R is opened, Zn in the refrigerant system n is closed, and Jn is closed.

[0118] S805, R is turned on, Zn in the refrigerant system n is turned on, and Jn is turned on.

[0119] S806, is it air supply mode? If so, go to S807, if not, go to S808.

[0120] S807, R is open, Z1, Z2, Z3, and Z4 are all open.

[0121] S808, R is closed, Z1, Z2, Z3, and Z4 are all open.

[0122] In non-cooling mode, J1, J2, J3, and J4 all maintain their current status.

[0123] When the air conditioning unit is in operation, this embodiment automatically adjusts the state of the heat exchanger according to the operation mode and the refrigerant system involved in the operation, thereby reducing the air supply resistance and increasing the condensing air volume.

[0124] like Figure 9 As shown, fan control includes the following steps:

[0125] S901: When the unit is running, for each opened refrigerant system, the condensing pressure Ph of the refrigerant system is detected in real time.

[0126] S902, determine whether Ph < Pmax is satisfied, if so, proceed to S903, if not, proceed to S907. Pmax represents the frequency limit pressure.

[0127] S903: Increase the frequency of the fan that is already turned on to F1, or increase the fan frequency to F1.

[0128] S904, determine whether △Wy>Wf is satisfied, if so, proceed to S905, if not, proceed to S906.

[0129] S905: Execute frequency increase F1 or increase fan frequency to f1. Specifically, the logic of Ph≥Pmax can be used to determine whether to increase frequency or increase fan frequency.

[0130] S906: Maintain the current state.

[0131] S907: Increase the frequency of the fan that is already turned on to F2, or increase the fan frequency to F2.

[0132] S908, determine whether Ph<Pmax is satisfied, if so, go to S909, if not, return to S907.

[0133] S909, determine whether W1≤W2 is satisfied, if so, proceed to S910, if not, proceed to S911.

[0134] S910, performing frequency upscaling F2.

[0135] S911, increase the fan frequency to f2.

[0136] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0137] Example 4

[0138] Based on the same inventive concept, this embodiment provides an air conditioning unit control device, which is applied to the air conditioning unit described in the above embodiment and can be used to implement the air conditioning unit control method described in the above embodiment. The air conditioning unit control device can be implemented through software and / or hardware and can generally be integrated into the controller of the air conditioning unit. The air conditioning unit control device includes:

[0139] a determination module, configured to determine an operating mode of the air conditioning unit;

[0140] The control module is used to control the rotating mechanism and / or the shielding mechanism according to the operating mode and the opening status of the refrigerant system.

[0141] Optionally, the control module is specifically used to: if the operating mode is the air supply mode, control all rotating mechanisms to rotate their corresponding first heat exchangers to the first position so that the supply air does not flow through the first heat exchanger, and / or control all shielding mechanisms to maintain the current state unchanged.

[0142] Optionally, the control module is specifically used to:

[0143] If the operating mode is the cooling mode, determining the refrigerant system that is turned on and the refrigerant system that is not turned on;

[0144] Controlling a rotating mechanism in the opened refrigerant system to rotate the corresponding first heat exchanger to a second position so that the supply air flows through the first heat exchanger, and / or controlling a shielding mechanism in the opened refrigerant system to expose the corresponding second heat exchanger;

[0145] Control the rotating mechanism in the unopened refrigerant system to rotate the corresponding first heat exchanger to the first position so that the supply air does not flow through the first heat exchanger, and / or control the shielding mechanism in the unopened refrigerant system to shield the corresponding second heat exchanger.

[0146] Optionally, if the air conditioning unit includes an electric heater for heating, and the electric heater is provided with a rotating mechanism, the control module is specifically configured to:

[0147] If the operating mode is the air supply mode or the cooling mode, controlling the rotating mechanism to rotate the electric heater so that the air supply does not flow through the electric heater;

[0148] If the operating mode is the heating mode and heating is performed by the electric heater, the rotating mechanism is controlled to rotate the electric heater so that the supply air flows through the electric heater, and the rotating mechanism and / or the shielding mechanism are controlled in the following manner: all the rotating mechanisms are controlled to rotate their respective corresponding first heat exchangers to the first position so that the supply air does not flow through the first heat exchanger, and / or all the shielding mechanisms are controlled to maintain their current state unchanged.

[0149] Optionally, if at least two heat exchange fans are corresponding to each of the second heat exchangers, the above-mentioned air-conditioning unit control device also includes: a method determination module, which is used to determine the method for increasing the condensing air volume of the refrigerant system according to the current condensing pressure and power information of the refrigerant system for the turned-on refrigerant system.

[0150] Optionally, the mode determination module includes:

[0151] a first calculation unit, configured to calculate a first power and a second power if the current condensing pressure is greater than or equal to a frequency-limiting pressure;

[0152] a comparing unit, configured to compare the first power and the second power;

[0153] a first determining unit, configured to determine a fan adjustment mode corresponding to a minimum value between the first power and the second power as a mode for increasing a condensing air volume of the refrigerant system;

[0154] Among them, the first power is the total system power required when the current condensing pressure is lower than the frequency-limiting pressure by increasing the frequency of the heat exchange fan, and the second power is the total system power required when the current condensing pressure is lower than the frequency-limiting pressure by increasing the number of heat exchange fans.

[0155] Optionally, the mode determination module includes:

[0156] a second calculation unit, configured to calculate a third power and a fourth power if the current condensing pressure is less than a frequency-limiting pressure;

[0157] a judging unit, configured to judge whether there is a state point such that the third power is greater than the fourth power;

[0158] a second determining unit, configured to, if present, select a method that minimizes the total system power between a method of increasing the frequency of the heat exchange fans and a method of increasing the number of heat exchange fans, as a method of increasing the condensing air volume of the refrigerant system;

[0159] A control unit, for controlling the heat exchange fan in the refrigerant system to maintain a current operating state if the control unit does not exist;

[0160] The third power is the reduction value of the total system power after the condensing air volume is increased, and the fourth power is the fan power required to increase the condensing air volume.

[0161] The above-mentioned air conditioning unit control device can execute the air conditioning unit control method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not fully described in this embodiment, please refer to the air conditioning unit control method provided by the embodiment of the present invention.

[0162] Example 5

[0163] This embodiment provides a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method described in the above embodiment when executing the computer program.

[0164] This embodiment provides a non-volatile computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method described in the above embodiment are implemented.

[0165] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of this embodiment.

[0166] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0167] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An air conditioning unit comprising at least two independent refrigerant systems, each refrigerant system comprising a first heat exchanger and a second heat exchanger, the first heat exchangers of each refrigerant system being arranged sequentially along an air supply direction within an air supply duct, characterized in that: The first heat exchanger is provided with a rotating mechanism, and the first heat exchanger is rotated by the rotating mechanism to control whether the supply air flows through the first heat exchanger; and / or, A shielding mechanism is provided on the air inlet side of the second heat exchanger, and the shielding mechanism is used to control whether air is allowed to flow through the second heat exchanger; Each of the second heat exchangers is provided with at least two heat exchange fans; the air conditioning unit further comprises: a control device, for a refrigerant system that has been turned on, the control device determining a method for increasing the condensing air volume of the refrigerant system based on the current condensing pressure and power information of the refrigerant system; According to the current condensing pressure and power information of the refrigerant system, a method for increasing the condensing air volume of the refrigerant system is determined, including: if the current condensing pressure is greater than or equal to the frequency-limiting pressure, calculating the first power and the second power; comparing the first power and the second power; determining the fan adjustment method corresponding to the minimum value of the first power and the second power as the method for increasing the condensing air volume of the refrigerant system; wherein, the first power is the total system power required when the current condensing pressure is less than the frequency-limiting pressure by increasing the frequency of the heat exchange fan, and the second power is the total system power required when the current condensing pressure is less than the frequency-limiting pressure by increasing the number of heat exchange fans.

2. The air conditioning unit according to claim 1, characterized in that: The rotating mechanism includes: a first rotating shaft, mounted to the air supply duct and connected to the first heat exchanger; The first driving component is used to drive the first rotating shaft to rotate, thereby driving the first heat exchanger to rotate. When the first heat exchanger rotates to the first position, the supply air does not flow through the first heat exchanger. When the first heat exchanger rotates to the second position, the supply air flows through the first heat exchanger.

3. The air conditioning unit according to claim 2, characterized in that: The rotating mechanism further includes: a limiting component, which is arranged on the inner wall of the air supply duct and is used to determine the second position.

4. The air conditioning unit according to claim 2, characterized in that: The first rotating shaft is connected to a first surface of the first heat exchanger, wherein the first surface is any surface of all surfaces of the first heat exchanger except an air inlet side and an air outlet side.

5. The air conditioning unit according to claim 1, characterized in that: The shielding mechanism includes: a second rotating shaft located on top of the second heat exchanger; a second driving component, configured to drive the second rotating shaft to rotate; A windshield roller blind has one end disposed on the second rotating shaft. As the second rotating shaft rotates, the windshield roller blind can be extended or retracted to cover or expose the second heat exchanger.

6. The air conditioning unit according to any one of claims 1 to 5, characterized in that: The air conditioning unit further comprises: An electric heater for heating is arranged in the air supply duct. The electric heater is provided with a rotating mechanism, and the rotating mechanism is used to rotate the electric heater to control whether the air supply flows through the electric heater.

7. A method for controlling an air conditioning unit, characterized in that: Applied to the air conditioning unit according to any one of claims 1 to 6, the air conditioning unit control method comprises: determining an operating mode of the air conditioning unit; controlling the rotating mechanism and / or the shielding mechanism according to the operating mode and the opening status of the refrigerant system; Each of the second heat exchangers is correspondingly provided with at least two heat exchange fans, and the method further includes: for the turned-on refrigerant system, determining a method for increasing the condensing air volume of the refrigerant system according to current condensing pressure and power information of the refrigerant system; According to the current condensing pressure and power information of the refrigerant system, a method for increasing the condensing air volume of the refrigerant system is determined, including: if the current condensing pressure is greater than or equal to the frequency-limiting pressure, calculating the first power and the second power; comparing the first power and the second power; determining the fan adjustment method corresponding to the minimum value of the first power and the second power as the method for increasing the condensing air volume of the refrigerant system; wherein, the first power is the total system power required when the current condensing pressure is less than the frequency-limiting pressure by increasing the frequency of the heat exchange fan, and the second power is the total system power required when the current condensing pressure is less than the frequency-limiting pressure by increasing the number of heat exchange fans.

8. The method according to claim 7, characterized in that According to the operating mode and the opening status of the refrigerant system, the rotating mechanism and / or the shielding mechanism is controlled, including: If the operating mode is the air supply mode, all rotating mechanisms are controlled to rotate their corresponding first heat exchangers to the first position so that the air supply does not flow through the first heat exchanger, and / or all shielding mechanisms are controlled to maintain the current state unchanged.

9. The method according to claim 7, characterized in that According to the operating mode and the opening status of the refrigerant system, the rotating mechanism and / or the shielding mechanism is controlled, including: If the operating mode is the cooling mode, determining the refrigerant system that is turned on and the refrigerant system that is not turned on; Controlling a rotating mechanism in the opened refrigerant system to rotate the corresponding first heat exchanger to a second position so that the supply air flows through the first heat exchanger, and / or controlling a shielding mechanism in the opened refrigerant system to expose the corresponding second heat exchanger; Control the rotating mechanism in the unopened refrigerant system to rotate the corresponding first heat exchanger to the first position so that the supply air does not flow through the first heat exchanger, and / or control the shielding mechanism in the unopened refrigerant system to shield the corresponding second heat exchanger.

10. The method according to claim 7, characterized in that If the air conditioning unit includes an electric heater for heating, and the electric heater is provided with a rotating mechanism, the method further includes: If the operating mode is the air supply mode or the cooling mode, controlling the rotating mechanism to rotate the electric heater so that the air supply does not flow through the electric heater; If the operating mode is the heating mode and heating is performed by the electric heater, the rotating mechanism is controlled to rotate the electric heater so that the supply air flows through the electric heater, and the rotating mechanism and / or the shielding mechanism are controlled in the following manner: all the rotating mechanisms are controlled to rotate their respective corresponding first heat exchangers to the first position so that the supply air does not flow through the first heat exchanger, and / or all the shielding mechanisms are controlled to maintain their current state unchanged.

11. The method according to claim 7, characterized in that According to the current condensing pressure and power information of the refrigerant system, a method of increasing the condensing air volume of the refrigerant system is determined, including: If the current condensing pressure is less than the frequency-limiting pressure, calculating the third power and the fourth power; determining whether there is a state point such that the third power is greater than the fourth power; If so, the method of increasing the frequency of the heat exchange fans and increasing the number of heat exchange fans with the lowest total system power is selected as the method of increasing the condensing air volume of the refrigerant system; If it does not exist, the heat exchange fan in the refrigerant system is controlled to maintain the current operating state; The third power is the reduction value of the total system power after the condensing air volume is increased, and the fourth power is the fan power required to increase the condensing air volume.

12. An air conditioning unit control device, characterized in that: Applicable to the air conditioning unit according to any one of claims 1 to 6, the air conditioning unit control device comprises: a determination module, configured to determine an operating mode of the air conditioning unit; a control module, configured to control the rotating mechanism and / or the shielding mechanism according to the operating mode and the activation status of the refrigerant system; Each of the second heat exchangers is correspondingly provided with at least two heat exchange fans, and the air conditioning unit control device further comprises: a mode determination module for determining, for a refrigerant system that has been turned on, a mode for increasing the condensing air volume of the refrigerant system according to current condensing pressure and power information of the refrigerant system; The mode determination module includes: a first calculation unit, configured to calculate a first power and a second power if the current condensing pressure is greater than or equal to a frequency-limiting pressure; a comparing unit, configured to compare the first power and the second power; a first determining unit, configured to determine a fan adjustment mode corresponding to a minimum value between the first power and the second power as a mode for increasing a condensing air volume of the refrigerant system; Among them, the first power is the total system power required when the current condensing pressure is lower than the frequency-limiting pressure by increasing the frequency of the heat exchange fan, and the second power is the total system power required when the current condensing pressure is lower than the frequency-limiting pressure by increasing the number of heat exchange fans.

13. A non-volatile computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 7 to 11 are implemented.

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