Power-adjustable phase change energy storage ventilating duct for air conditioner operation decoupling

Abstract

The invention discloses a power-adjustable phase change energy storage ventilating duct for air conditioner operation decoupling. The power-adjustable phase change energy storage ventilating duct comprises a ventilating duct body, a phase change material plate, a phase change material heat preservation plate and an electromagnetic thermal diode heat exchange mechanism. The active control of heat transfer between the phase-change material and air can be realized by adjusting the electromagnetic thermal diode heat exchange mechanism, so that the effects of independently adjusting the charging and discharging power and decoupling from the operation of the air conditioner are achieved. The problems that in the prior art, energy consumption is wasted, and the air pressure drop is too large are solved, the controllability and operation efficiency of the energy storage device are improved, and the energy storage device is suitable for various building air conditioning systems and meets the energy storage requirement.

Description

Technical Field

[0001] The present invention belongs to the technical field of air-conditioning systems and indoor environmental ventilation, and particularly relates to a power-adjustable phase-change energy storage ventilation duct with decoupled air-conditioning operation. Background Art

[0002] Building air conditioners consume a large amount of energy, accounting for 25% to 30% globally. The peak energy consumption of building air conditioners poses a huge pressure on the safe and stable operation of the power grid in summer. In order to reduce the peak energy consumption of building air conditioners and promote the utilization of natural cooling and heat energy, phase-change energy storage is often used as an energy storage device for building air conditioners in the HVAC industry.

[0003] The phase-change energy storage ventilation duct is an energy storage device applicable to air-conditioning systems. The phase-change energy storage air duct places the phase-change material with an encapsulation shell in the ventilation duct, and the phase-change material absorbs or releases heat through the heat exchange between the flowing air in the duct and the encapsulation shell of the phase-change material, thereby achieving energy charging or discharging.

[0004] Due to its design defects, the existing phase-change energy storage ventilation duct has the operation of the air-conditioning system coupled with the charging and discharging of the phase-change material, and it is impossible to independently control the start / stop and charging / discharging power of the phase-change energy storage ventilation duct. The phase-change energy storage ventilation duct is usually placed on the air supply side of the air-conditioning system. When the air-conditioning system provides cooled or heated air for the indoor environment, as long as there is a temperature difference between the air and the phase-change material in the ventilation duct, the charging and discharging process will occur, resulting in a large amount of ineffective charging and discharging, causing waste of air-conditioning energy consumption. Moreover, the charging and discharging power of the existing phase-change energy storage ventilation duct completely depends on the temperature difference between the air and the phase-change material and the air flow rate, and the controllability as an energy storage device is poor.

[0005] On the other hand, the existing phase-change energy storage device places a series of mutually parallel phase-change energy storage material plates in layers in the ventilation duct, and the gaps between the upper and lower adjacent phase-change energy storage material plates form an inter-plate air duct for gas passage. This arrangement greatly reduces the air circulation space in the ventilation duct, continuously causing a large air pressure drop, and wasting fan energy consumption on the basis of wasting air-conditioning energy consumption due to ineffective charging and discharging.

[0006] The bypass type phase-change energy storage ventilation duct can partially solve the operation coupling problem, but it requires the erection of a new bypass air duct, occupying additional space and causing difficulties in equipment installation. The bypass duct joint also increases the air flow resistance.

[0007] The form of attaching the phase-change material plate to the inner wall of the air duct and directly exchanging heat with the flowing air can alleviate the problem of excessive air flow resistance to a certain extent, but it cannot solve the problem of air-conditioning operation coupling. Therefore, a power-adjustable phase-change energy storage ventilation duct device with decoupled air-conditioning operation is needed. Summary of the Invention

[0008] In order to solve at least one of the problems existing in the prior art, the present invention provides a power-adjustable phase change energy storage ventilation duct with decoupled air-conditioning operation and its control method. The phase change energy storage air duct regulates the heat exchange between the phase change material and air based on an electromagnetic thermal diode heat exchange mechanism, and can adjust the charging and discharging power of the phase change material by adjusting the number of on-off electromagnetic thermal diodes, so as to achieve decoupling from air-conditioning operation and independent adjustment of charging and discharging power.

[0009] To achieve the object of the present invention, a power-adjustable phase change energy storage ventilation duct with decoupled air-conditioning operation provided by the present invention includes:

[0010] A ventilation duct for air flow in an air-conditioning system;

[0011] A phase change material plate disposed in the ventilation duct, the phase change material plate including a wrapping layer and a phase change material located inside the wrapping layer;

[0012] A phase change material heat preservation plate located in the ventilation duct and closely attached to the upper surface of the phase change material plate;

[0013] An electromagnetic thermal diode heat exchange mechanism disposed in the ventilation duct for regulating the heat exchange between the phase change material and air;

[0014] A controller for controlling the start and stop of the electromagnetic thermal diode heat exchange mechanism and adjusting the power of the phase change energy storage ventilation duct.

[0015] Further, the ventilation duct is a commonly used ventilation duct in an air-conditioning system, and the phase change energy storage air duct directly replaces a section of ordinary ventilation duct in the air system of a central air-conditioning system.

[0016] Further, the phase change material plate is laid flat on the lower side inside the ventilation duct.

[0017] Further, a cavity inside the wrapping layer is filled with a phase change material; the phase change material undergoes solid-liquid phase change, and the phase change temperature range of the phase change material is 15°C - 35°C, and a suitable phase change temperature can be selected according to the refrigeration or heating working conditions and the air supply temperature of the air conditioner.

[0018] Further, the size of the phase change material plate is the same as the inner wall size of the ventilation duct.

[0019] Further, the length and width of the phase change material plate are the same as the length and width inside the ventilation duct.

[0020] Further, the phase change material undergoes solid-liquid phase change, and the phase change temperature of the phase change material is 15°C - 35°C.

[0021] Furthermore, the phase change material thermal insulation board is made of a rigid thermal insulation material and is closely attached to the upper surface of the phase change material board. The length and width of the phase change material thermal insulation board are the same as those of the phase change material board.

[0022] Furthermore, the electromagnetic thermal diode heat exchange mechanism includes a phase change material side heat conduction component and an air side heat conduction component;

[0023] The phase change material side heat conduction component includes a phase change material side heat conduction rod, a first air side heat conduction joint, and a phase change material side fin group. The phase change material side heat conduction rod sequentially passes through the phase change material thermal insulation board, the phase change material board, and is connected to the inner wall of the ventilation duct. The phase change material side fin group is buried in the phase change material board, and the first air side heat conduction joint is located above the phase change material thermal insulation board and is connected to the phase change material side heat conduction rod;

[0024] The air side heat conduction component includes an air side heat conduction rod, an air side fin group, and a second air side heat conduction joint. The air side fin group is arranged on the air side heat conduction rod and the air side heat conduction rod passes through the second air side heat conduction joint. The second air side heat conduction joint is arranged opposite to the first air side heat conduction joint;

[0025] The air side heat conduction component can move towards or away from the phase change material side heat conduction component.

[0026] The phase change material side heat conduction component can transfer heat between the first air side heat conduction joint and the phase change material board; the air side heat conduction component can transfer heat between the second air side heat conduction joint and the air in the ventilation duct.

[0027] Furthermore, the phase change material side heat conduction rod is inserted from the upper side of the phase change material thermal insulation board, completely passes through the phase change material thermal insulation board, and its lower end is fixed on the lower surface of the ventilation duct. A part of the phase change material side heat conduction rod is buried in the phase change material board, and its upper end is connected to the first air side heat conduction joint above the phase change material thermal insulation board.

[0028] Furthermore, the phase change material side fin group includes a number of phase change material side fins, which are arranged horizontally and parallel to each other. The phase change material side fin group is buried in the phase change material board and is connected to the phase change material side heat conduction rod.

[0029] Furthermore, the air side heat conduction rod is arranged horizontally, and the radial direction of the air side heat conduction rod is parallel to the air flow direction in the ventilation duct.

[0030] Furthermore, the air side fin group includes a number of mutually parallel air side fins, which are arranged perpendicular to the horizontal plane, and the long sides thereof are parallel to the air flow direction in the ventilation duct.

[0031] Further, the electromagnetic thermal diode heat exchange mechanism further includes a pulley armature, an electromagnet, and a tension spring. The pulley armature is connected to the air-side heat conducting rod. The electromagnet and the pulley armature are arranged opposite to each other. When the electromagnet is energized, it can drive the pulley armature to move through magnetic force. The second air-side heat conducting joint is connected to the ventilation duct through a tension spring.

[0032] Further, the electromagnetic thermal diode heat exchange mechanism further includes a guide rail, and the pulley armature is slidably arranged on the guide rail.

[0033] Further, the length of the air-side heat conducting rod is 50%-95% of the width of the ventilation duct.

[0034] Further, when the electromagnet is energized, the second air-side heat conducting joint contacts the first air-side heat conducting joint, thereby realizing the heat exchange between the flowing air in the duct and the phase change material; when the electromagnet is de-energized, the second air-side heat conducting joint is separated from the first air-side heat conducting joint, thereby isolating the heat exchange between the flowing air in the duct and the phase change material.

[0035] When the electromagnet is energized, it provides magnetic force to attract the pulley armature along the guide rail towards the electromagnet. The pulley armature drives the air-side heat conducting assembly to move towards the direction close to the phase change material-side heat conducting assembly, so that the second air-side heat conducting joint contacts and presses the first air-side heat conducting joint; when the electromagnet is energized, the tension spring enters and remains in a stretched state. When the electromagnet is de-energized, the tension spring enters and remains in a contracted state. When the tension spring enters the contracted state, the air-side heat conducting assembly slides away from the phase change material-side heat conducting assembly along with the contraction of the tension spring, and the second air-side heat conducting joint is separated from the first air-side heat conducting joint and maintains a certain distance.

[0036] Further, the second air-side heat conducting joint is aligned with the first air-side heat conducting joint, and they contact when the electromagnet is energized and cannot contact and maintain a certain distance when the electromagnet is de-energized. Preferably, the distance is 1 cm - 5 cm.

[0037] Further, the pulley armature is of a U-shaped structure. Pulleys are installed at the lower ends of the two long sides of the U-shaped structure, and the pulleys slide along a fixed track in the guide rail. The two long sides of the U-shaped structure are connected to the air-side heat conducting rod. The pulley armature provides support for the air-side heat conducting assembly and assists the air-side heat conducting assembly to slide along the track specified by the guide rail.

[0038] Further, for the pulley armature, the short side of its U-shaped structure is made of ferromagnetic material, and the position of the short side is between the first air-side heat conducting joint and the electromagnet.

[0039] Further, the guide rail is fixed above the phase change material heat preservation board, and the sliding direction guided by the guide rail is parallel to the air flow direction of the ventilation duct.

[0040] Further, one end of the tension spring is fixed to the second air-side heat conduction joint, and the other end is fixed to the fixed column. The fixed column is fixed to the lower surface inside the ventilation duct, and the fixed column provides support for the contraction and stretching of the tension spring.

[0041] Further, the electromagnet is fixed to the lower surface inside the ventilation duct through a bracket, and any one of the north and south poles of the electromagnet is 1 cm - 5 cm away from the short side of the U-shaped structure of the pulley armature.

[0042] Further, the controller collects data on the air temperature at the inlet and outlet of the duct, the air velocity at the outlet, or the air pressure difference through a temperature sensor and a wind speed sensor or a differential pressure sensor, and adjusts the on-off state of the electromagnetic heat diode heat exchange mechanism in real time.

[0043] Further, in the phase change ventilation duct, a plurality of the electromagnetic heat diode heat exchange mechanisms are arranged along the air flow direction of the ventilation duct. This technical solution independently controls the energization state of the electromagnets of each of the electromagnetic heat diode heat exchange mechanisms.

[0044] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0045] 1. The present invention can simultaneously solve the problems of waste of ineffective charging and discharging energy consumption in the phase change energy storage of the air conditioning system, the controllability problem of the phase change energy storage device, and the air pressure drop problem of the phase change energy storage device; by using the electromagnetic heat diode heat exchange mechanism, active control of heat transfer between the phase change material and the air is realized, and the problems of waste of ineffective charging and discharging energy consumption and controllability are solved; by using the air-side heat conduction component, the air flow resistance is reduced and the air pressure drop problem is solved.

[0046] 2. The present invention is easy to install, without the need to add a bypass ventilation duct and a wind valve in the air conditioning system, and does not require additional equipment space; only the existing air duct needs to be replaced with a phase change energy storage air duct, and it can be integrated into the air conditioning system as an energy storage device, greatly reducing the installation cost of the device.

[0047] 3. The present invention has a simple and reliable structure, low maintenance cost and is easy to process, which is conducive to batch production and has great industrialization potential. Description of the Drawings

[0048] Figure 1 It is a schematic structural diagram of a power-adjustable phase change energy storage ventilation duct with air conditioning operation decoupling in an embodiment of the present invention, in which the upper surface of the ventilation duct is partially cut open for easy observation of the internal structure, and includes a partial enlarged view of the electromagnet in the on or off state.

[0049] Figure 2Partial top view of the power - adjustable phase - change energy - storage ventilation duct for decoupling air - conditioner operation in an embodiment of the present invention, where the electromagnet is energized and the upper surface of the ventilation duct is removed;

[0050] Figure 3 Partial top view of the power - adjustable phase - change energy - storage ventilation duct for decoupling air - conditioner operation in an embodiment of the present invention, where the electromagnet is de - energized and the upper surface of the ventilation duct is removed;

[0051] Figure 4 Formal cross - sectional view of the power - adjustable phase - change energy - storage ventilation duct for decoupling air - conditioner operation in an embodiment of the present invention, cut at the phase - change material side heat - conducting component.

[0052] Figure 5 Formal cross - sectional view of the power - adjustable phase - change energy - storage ventilation duct for decoupling air - conditioner operation in an embodiment of the present invention, cut at the air - side heat - conducting component.

[0053] Figure 6 Logic block diagram of the control method for the power - adjustable phase - change energy - storage ventilation duct for decoupling air - conditioner operation in an embodiment of the present invention.

[0054] In the figure: 1. Ventilation duct; 2. Phase - change material plate; 3. Phase - change material insulation plate; 4. Electromagnetic heat - diode heat - exchange mechanism; 5. Phase - change material side heat - conducting component; 6. Air - side heat - conducting component; 7. Pulley armature; 8. Guide rail; 9. Tension spring; 10. Fixed column; 11. Electromagnet; 12. Phase - change material side heat - conducting rod; 13. Air - side heat - conducting joint 1; 14. Phase - change material side fin group; 15. Air - side heat - conducting rod; 16. Air - side fin group; 17. Second air - side heat - conducting joint. Detailed implementation manners

[0055] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will be further described in detail with reference to the drawings. The embodiments cannot be elaborated one by one here, but the implementation manners of the present invention are not limited to the following embodiments.

[0056] As Figures 1 to 5 shown, a power - adjustable phase - change energy - storage ventilation duct for decoupling air - conditioner operation (hereinafter simply referred to as phase - change energy - storage air duct) provided by the present invention includes:

[0057] A ventilation duct 1, which is used for the air flow in the air - conditioner system;

[0058] A phase - change material plate 2, which is laid flat on the lower side inside the ventilation duct 1. The phase - change material plate 2 includes a wrapping layer and a phase - change material located inside the wrapping layer;

[0059] The phase change material heat preservation board 3 is located inside the ventilation duct 1 and closely adheres to the upper surface of the phase change material board 2;

[0060] The electromagnetic thermal diode heat exchange mechanism 4 is used to regulate the heat exchange between the phase change material and the air;

[0061] The controller is used to control the start and stop of the electromagnetic thermal diode heat exchange mechanism 4 and adjust the power of the phase change energy storage air duct.

[0062] The electromagnetic thermal diode heat exchange mechanism 4 includes a phase change material side heat conduction component 5, an air side heat conduction component 6, a pulley armature 7, a guide rail 8, a tension spring 9, a fixed column 10 and an electromagnet 11.

[0063] The phase change material side heat conduction component 5 includes a phase change material side heat conduction rod 12, a first air side heat conduction joint 13 and a phase change material side fin group 14. The phase change material side heat conduction rod 12 is inserted from the upper side of the phase change material heat preservation board 3 and then completely passes through the phase change material heat preservation board 3 and the phase change material board 2. The lower end of the phase change material side heat conduction rod 12 is fixed to the lower surface inside the ventilation duct 1 by welding. A part of the phase change material side heat conduction rod 12 is buried in the phase change material board 2. The upper end of the phase change material side heat conduction rod 12 is connected to the first air side heat conduction joint 13 by welding above the phase change material heat preservation board 3; the phase change material side fin group 14 includes a number of phase change material side fins, and the number of phase change material side fins are arranged horizontally and parallel to each other. The phase change material side fin group 14 is buried in the phase change material board 2 and is connected to the phase change material side heat conduction rod 12. The phase change material side heat conduction component 5 can transfer heat between the first air side heat conduction joint 13 and the phase change material board 2.

[0064] The air side heat conduction component 6 includes an air side heat conduction rod 15, an air side fin group 16 and a second air side heat conduction joint 17. The air side heat conduction rod 15 is arranged horizontally, and the radial direction of the air side heat conduction rod 15 is parallel to the air flow direction of the ventilation duct 1; the air side fin group 16 includes a number of mutually parallel air side fins, the air side fins are arranged perpendicular to the horizontal plane, and their long sides are parallel to the air flow direction of the ventilation duct 1. A number of air side fins are arranged at intervals on the air side heat conduction rod 15, and the air side heat conduction rod 15 passes through the second air side heat conduction joint 17; the second air side heat conduction joint 17 is aligned with the first air side heat conduction joint 13, and they are in contact when the electromagnet 11 is energized and not in contact and maintain a certain distance when the electromagnet 11 is de-energized. The air side heat conduction component 6 is used to transfer heat between the second air side heat conduction joint 17 and the air in the ventilation duct 1.

[0065] The fixed column 10 is welded and fixed to the lower surface of the inner wall of the ventilation duct 1. The fixed column 10 is connected to the second air-side heat conduction joint 17 in the air-side heat conduction assembly 6 through a tension spring 9, that is, one end of the tension spring 9 is fixed to the second air-side heat conduction joint 17, and the other end is fixedly connected to the fixed column 10. The fixed column 10 can provide support for the contraction and stretching of the tension spring 9. The electromagnet 11 is welded and fixed to the lower surface in the ventilation duct 1 through a bracket, and is disposed opposite to the first air-side heat conduction joint 13.

[0066] In some embodiments of the present invention, the air-side heat conduction assembly 6 is supported and limited by a pulley armature 7 and a guide rail 8, wherein the guide rail 8 is fixed to the phase change material heat insulation board 3 by an adhesive, and the sliding direction guided by the guide rail 8 is parallel to the air flow direction of the ventilation duct 1.

[0067] In some embodiments of the present invention, the pulley armature 7 is of a U-shaped structure. Pulleys are installed at the bottoms of the two long sides of the U-shaped structure, and the pulleys are slidably arranged on the guide rail 8. The two long sides of the U-shaped structure are connected to the air-side heat conduction rods 15. The short side of the U-shaped structure is made of a ferromagnetic material, and the position of the short side is between the first air-side heat conduction joint 13 and the electromagnet 11.

[0068] The pulley armature 7 provides support for the air-side heat conduction assembly 6 and assists the air-side heat conduction assembly 6 to slide along the trajectory defined by the guide rail 8.

[0069] When the electromagnet 11 is energized, it provides a magnetic force to attract the pulley armature 7 along the guide rail 8 towards the electromagnet 11, and the air-side heat conduction rods 15, the second air-side heat conduction joint 17 and the air-side fin group 16 move together. The pulley armature 7 drives the air-side heat conduction assembly 6 to move towards the phase change material side heat conduction assembly 5, so that the second air-side heat conduction joint 17 contacts and presses the first air-side heat conduction joint 13. When the electromagnet 11 is energized, the tension spring 9 is in a stretched state. When the electromagnet 11 is de-energized, the tension spring 9 is in a contracted state. When the tension spring 9 enters the contracted state, the air-side heat conduction assembly 6 slides away from the phase change material side heat conduction assembly 5 as the tension spring 9 contracts, and the second air-side heat conduction joint 17 separates from the first air-side heat conduction joint 13 and maintains a certain distance.

[0070] In some embodiments of the present invention, when the electromagnet 11 is de-energized, the distance between the second air-side heat conduction joint 17 and the first air-side heat conduction joint 13 is 1 cm - 5 cm.

[0071] In some embodiments of the present invention, any one of the north and south poles of the electromagnet 11 is 1 cm - 5 cm away from the short side of the U-shaped structure of the pulley armature 7.

[0072] In some embodiments of the present invention, in the phase change energy storage air duct, a plurality of the electromagnetic thermal diode heat exchange mechanisms 4 are arranged along the air flow direction of the ventilation duct 1. The energization state of the electromagnet 11 of each of the electromagnetic thermal diode heat exchange mechanisms 4 is independently controlled.

[0073] In some embodiments of the present invention, the phase change energy storage ventilation duct is installed in the supply air duct of the central air conditioning system. After removing a section of the air duct, the air duct of the present invention with the same external dimensions as the removed air duct is connected, but it is not limited thereto, and other situations applied to cold storage and heat storage can also be applied.

[0074] In some embodiments of the present invention, the ventilation duct 1 can be made of sheet metal such as galvanized iron sheet or fiberglass, and its external dimensions are the same as those of the existing ventilation duct to which it is connected.

[0075] In some embodiments of the present invention, the phase change material plate 2 is encapsulated by a rigid thin-walled container to form a wrapping layer, and the phase change material inside is a hydrated salt phase change material with a melting point of about 20°C. The encapsulation container and the ventilation duct 1 are fixedly connected by an adhesive method.

[0076] In some embodiments of the present invention, the phase change material insulation board 3 is an XPS insulation board, and is closely attached to the upper surface of the encapsulation container of the phase change material plate 2 by an adhesive method.

[0077] In some embodiments of the present invention, the length of the air-side heat conduction rod 15 is 50%-95% of the width of the ventilation duct 1.

[0078] The control method of the power-adjustable phase change energy storage ventilation duct with decoupled air-conditioning operation is as follows:

[0079] 1) The phase change energy storage air duct has two working states, a standby state and an operating state. The working state of the phase change energy storage air duct is determined by the upper controller of the externally connected intelligent building system or smart home system.

[0080] 2) In the standby state, the air in the ventilation duct is in a flowing state or a static state, and the electromagnets 11 of all the electromagnetic thermal diode heat exchange mechanisms 4 are in an off state. Heat cannot be transferred between the air and the phase change material through the electromagnetic thermal diode heat exchange mechanism 4. This makes the operation of the air conditioner completely decoupled from the heat absorption and heat release of the phase change material.

[0081] 3) In the operating state, the air in the ventilation duct is in a flowing state, and the electromagnets 11 of all or part of the electromagnetic thermal diode heat exchange mechanisms 4 are in a connected state. Heat is transferred between the air in the ventilation duct 1 and the phase change material through the electromagnetic thermal diode heat exchange mechanism 4.

[0082] 4) During the operation state, the power of heat transfer between the air in the ventilation duct 1 and the phase change material (i.e., the power of the phase change material absorbing or releasing heat, i.e., the power of the air being cooled or heated) is adjusted by controlling the on-off state of the electromagnets 11 of the several electromagnetic thermal diode heat exchange mechanisms 4.

[0083] 5) The phase change energy storage air duct has a controller with the functions of collecting sensor data, controlling the on-off of multiple circuits, and timing. After each set time step, this controller executes the following steps 6)-13), as Figure 6 shown.

[0084] 6) The controller obtains the working state information from the upper-layer controller and judges whether it is in the operation state or the standby state.

[0085] 7) In the standby state, judge whether all the electromagnets 11 are disconnected. If so, end the process; if not, cut off the power supply of all the electromagnets 11 and end the process.

[0086] 8) During the operation state, the inlet air temperature, outlet air temperature, and air flow rate of the ventilation duct 1 are respectively collected through the inlet air temperature sensor, outlet air temperature sensor, and air flow rate sensor.

[0087] 9) During the operation state, the controller collects the inlet air temperature, outlet air temperature, and air flow rate and calculates the actual power of heat transfer between the air in the ventilation duct and the phase change material according to the following formula.

[0088] Actual power = air flow rate × cross-sectional area of the measuring point duct × air density × specific heat capacity of air × |

[0089] Outlet air temperature - inlet air temperature|

[0090] 10) As an alternative to the air flow rate sensor, a differential pressure gauge arranged at the inlet and outlet of the ventilation duct is used to replace the air flow rate sensor. At this time, the following formula should be used to calculate the actual power of heat transfer between the air in the ventilation duct and the phase change material.

[0091] Actual power = √(pressure difference between inlet and outlet) × pipeline pressure difference coefficient × air density × specific heat capacity of air

[0092] × |Outlet air temperature - inlet air temperature|

[0093] 11) During the operation state, the controller obtains the set power value from the upper-layer controller.

[0094] 12) During the operation state, the controller judges whether all the electromagnets 11 are turned on. If so, enter the sub-operation state A; if not, enter the sub-operation state B.

[0095] 13) When in the sub - operating state A, the controller compares the actual power with the set power. If the actual power

[0096] < the set power, it reports to the upper - layer controller: "The power set value is too large to be satisfied";

[0097] If the actual power ≥ the set power, disconnect the power supply circuit of one electromagnet. End the process.

[0098] 14) When in the sub - operating state B, the controller compares the actual power with the set power. If the actual power

[0099] < the set power, connect the power supply circuit of one electromagnet and end the process; if the actual power ≥ the set power, enter the sub - operating state B - 1.

[0100] 15) When in the sub - operating state B - 1, the controller queries whether only one electromagnet is in the on state.

[0101] If so, it reports to the upper - layer controller: "The power set value is too small to be satisfied"; if not,

[0102] then disconnect the power supply circuit of one electromagnet. The process ends.

[0103] The above - mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A power-adjustable phase-change energy storage ventilation duct with decoupling of air-conditioning operation, characterized in that: include: A ventilation duct (1), wherein the ventilation duct (1) is used for air flow in an air conditioning system; A phase change material plate (2), the phase change material plate (2) being arranged in the ventilation duct (1), the phase change material plate (2) comprising a wrapping layer and a phase change material located inside the wrapping layer; A phase change material insulation board (3), the phase change material insulation board (3) being located in the ventilation duct (1) and closely attached to the upper surface of the phase change material board (2); An electromagnetic heat diode heat exchange mechanism (4), the electromagnetic heat diode heat exchange mechanism (4) being arranged in the ventilation duct (1) and used for regulating heat exchange between the phase change material and the air; A controller is used to control the start and stop of the electromagnetic thermal diode heat exchange mechanism (4) and to adjust the power of the phase change energy storage ventilation duct.

2. The power-adjustable phase-change energy storage ventilation duct with decoupled air-conditioning operation according to claim 1 is characterized in that: A plurality of electromagnetic thermal diode heat exchange mechanisms are arranged in the ventilation duct.

3. The power-adjustable phase-change energy storage ventilation duct with decoupled air-conditioning operation according to claim 1 is characterized in that: The phase change temperature range of the phase change material is 15°C-35°C.

4. The power-adjustable phase-change energy storage ventilation duct with decoupled air-conditioning operation according to claim 1 is characterized in that: The size of the phase change material plate (2) is the same as the size of the inner wall of the ventilation duct (1).

5. The power-adjustable phase-change energy storage ventilation duct with decoupled air-conditioning operation according to claim 1 is characterized in that: The electromagnetic thermal diode heat exchange mechanism (4) comprises a phase change material side heat conduction component (5) and an air side heat conduction component (6); The phase change material side heat conduction component (5) comprises a phase change material side heat conduction rod (12), a first air side heat conduction joint (13) and a phase change material side fin group (14); the phase change material side heat conduction rod (12) sequentially passes through the phase change material insulation board (3) and the phase change material board (2) and is connected to the inner wall of the ventilation duct (1); the phase change material side fin group (14) is buried in the phase change material board (2); the first air side heat conduction joint (13) is located above the phase change material insulation board (3) and is connected to the phase change material side heat conduction rod (12); The air-side heat-conducting assembly (6) comprises an air-side heat-conducting rod (15), an air-side fin group (16) and a second air-side heat-conducting joint (17); the air-side fin group (16) is arranged on the air-side heat-conducting rod (15) and the air-side heat-conducting rod (15) passes through the second air-side heat-conducting joint (17); the second air-side heat-conducting joint (17) is arranged opposite to the first air-side heat-conducting joint (13); The air-side heat-conducting component (6) can move toward the phase-change material-side heat-conducting component (5) or away from the phase-change material-side heat-conducting component (5).

6. The power-adjustable phase-change energy storage ventilation duct with decoupled air-conditioning operation according to claim 5, characterized in that: The electromagnetic thermal diode heat exchange mechanism (4) also includes a pulley armature (7), an electromagnet (11) and a tension spring (9); the pulley armature (7) is connected to an air-side heat-conducting rod (15); the electromagnet (11) and the pulley armature (7) are arranged relative to each other; when the electromagnet (11) is energized, the pulley armature (7) can be driven to move by magnetic force; and the second air-side heat-conducting joint (17) is connected to the ventilation duct (1) via the tension spring (9).

7. The power-adjustable phase-change energy storage ventilation duct with decoupled air-conditioning operation according to claim 5, characterized in that: The electromagnetic thermal diode heat exchange mechanism (4) also includes a guide rail (8), and the pulley armature (7) is slidably arranged on the guide rail (8).

8. The power-adjustable phase-change energy storage ventilation duct with decoupled air-conditioning operation according to claim 5, characterized in that: The length of the air-side heat conducting rod (15) is 50%-95% of the width of the ventilation duct (1).

9. The power-adjustable phase-change energy storage ventilation duct with decoupled air-conditioning operation according to claim 5, characterized in that: When the electromagnet (11) is powered on, the second air-side heat-conducting joint (17) contacts the first air-side heat-conducting joint (13), thereby achieving heat exchange between the flowing air in the pipeline and the phase change material; when the electromagnet (11) is powered off, the second air-side heat-conducting joint (17) is disconnected from the first air-side heat-conducting joint (13), thereby isolating the heat exchange between the flowing air in the pipeline and the phase change material.

10. A power-adjustable phase-change energy storage ventilation duct with decoupled air-conditioning operation according to any one of claims 1-9, characterized in that: The controller collects data on the air temperature at the inlet and outlet of the pipeline, the outlet air velocity or the air pressure difference through a temperature sensor and a wind speed sensor or a pressure difference sensor, and adjusts the on and off state of the electromagnetic thermal diode heat exchange mechanism (4) in real time.

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