A method and device for testing the thermal performance of a plate-shaped phase change energy storage component

Abstract

The present invention relates to the technical field of thermal performance detection of phase change energy storage components, and particularly to a method and device for testing the thermal performance of plate-shaped phase change energy storage components, which are used to solve the problem that the existing device needs to break the object to be detected for detection; the testing method includes the following steps: when it is detected that the central temperature of the sample is consistent with the base temperature t0, keep the temperature constant for a time T b1 minutes, then increase the heating temperature to t0 + 1 °C, and continue to keep the temperature constant for T b1 minutes, and so on until the highest temperature t f is reached; after keeping the temperature constant for a time T f from t b2 minutes, then cool down. The initial temperature is t f , reduce the heating temperature to t f - 1 °C, and keep the temperature constant for a time T b1 minutes until the central temperature of the sample returns to the base temperature t0. This testing method does not require crushing the object to be detected, ensuring the integrity of the object to be detected.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal performance detection for phase change energy storage components, and particularly to a method and device for testing the thermal performance of plate-shaped phase change energy storage components. Background Art

[0002] As a green energy-saving product, phase change energy storage materials have gradually been accepted by the market and widely used in road surface and building energy-saving materials, such as phase change asphalt mixture snow-melting roads, phase change mortar, phase change concrete, phase change gypsum board, phase change wallboard, etc. Although phase change energy storage components have many advantages, the basic thermal performance indicators of the products cannot be tested, especially the overall thermal performance of the products cannot be characterized.

[0003] The invention patent "Thermal Performance Testing System for Phase Change Temperature-Regulating Building Materials" with the patent number ZL201010159859.8 can test the phase change latent heat, phase change temperature, specific heat capacity, etc. of phase change materials and products, but only granular or liquid samples can be tested, and the large-sized phase change energy storage components need to be damaged for testing. Therefore, it is not suitable for the thermal performance detection of plate-shaped phase change energy storage components. Summary of the Invention

[0004] The present invention provides a method and device for testing the thermal performance of plate-shaped phase change energy storage components to solve the problem that the existing device needs to break the object to be detected for detection.

[0005] To alleviate the above technical problems, the technical solution provided by the present invention lies in:

[0006] A method for testing the thermal performance of plate-shaped phase change energy storage components includes the following steps:

[0007] S1. Place the sample in a cold box to cool down;

[0008] S2. Take out the sample from the cold box and put it into a thermal performance testing device, set the basic temperature t0, perform heat preservation treatment on the sample, and collect heat flux data and temperature data;

[0009] S3. When it is detected that the central temperature of the sample is consistent with the basic temperature t0, keep the temperature constant for T b1 minutes, then raise the heating temperature to t0 + 1 °C, and continue to keep the temperature constant for T b1 minutes, and so on until the highest temperature t f is reached;

[0010] S4. Start to cool down after keeping the temperature constant for T f minutes from t b2 , the initial temperature is t f , lower the heating temperature to t f -1 °C, and keep the temperature constant for T b1Minutes until the central temperature of the sample reaches the base temperature t0.

[0011] Furthermore, the method further includes the following steps:

[0012] S5. Collect temperature data to construct a visualization analysis chart of temperature rise and fall, and obtain the region in the visualization analysis chart of temperature rise and fall where the temperature fluctuation is less than the set fluctuation amplitude range as the stable state interval, and the temperature interval corresponding to the stable state interval is the phase change temperature interval;

[0013] S6. Collect heat flow data to construct a visualization analysis chart of heat absorption and release, and obtain the time region with the smallest heat fluctuation and the largest heat absorption in the visualization analysis chart of heat absorption and release as the latent heat of phase change region.

[0014] A thermal performance test device for a plate-shaped phase change energy storage member, which is applied to the thermal performance test method of the plate-shaped phase change energy storage member, includes a heating mechanism and a clamping mechanism. The heating mechanism includes a pipeline. The clamping mechanism includes a base and a top seat. The clamping mechanism includes a fixed seat. The top seat is vertically slidably connected to the fixed seat. A piston cylinder communicated with the first pipeline is fixedly connected to the fixed seat. A piston rod is slidably connected in the piston cylinder. The bottom end of the piston rod is fixedly connected to the top seat, and a through hole is opened in the middle of the piston rod. The inner diameter of the first pipeline is not greater than the through hole. When the heat conduction medium flows from the through hole to the first pipeline, the piston rod moves downward so that the top seat approaches the base.

[0015] Furthermore, the clamping mechanism further includes a cylinder connected to the piston cylinder. A round rod is slidably connected in the cylinder. A valve is arranged on the first pipeline. When the pressure in the piston cylinder increases, the round rod moves upward in the cylinder and drives the valve to increase the opening degree.

[0016] Furthermore, the clamping mechanism further includes a torsion spring between the valve rod connected to the valve and the first pipeline. A pull rope is wound and connected to the valve rod. The end of the pull rope penetrates through the cylinder and is fixedly connected to the round rod. A spring is connected between the round rod and the cylinder.

[0017] Furthermore, the heating mechanism includes a heating cylinder. An electric rotating shaft is rotatably connected in the heating cylinder. A partition is fixedly connected to the side wall of the electric rotating shaft. The partition is attached to the inner wall of the heating cylinder. The partition divides the heating cylinder into multiple heating spaces. The temperatures of the heat conduction media in the multiple heating spaces increase or decrease in a clockwise gradient.

[0018] Furthermore, the heating mechanism further includes a second pipeline. Both the first pipeline and the second pipeline are communicated with the heating cylinder. S-shaped flow channels for the flow of heat-conducting oil are opened in both the top seat and the base.

[0019] Furthermore, the heating mechanism further includes a shunt pipe, which is communicated with the first pipe. A four-way valve is arranged at the connection of the shunt pipe and the first pipe. The shunt pipe is communicated with the heating space adjacent to the first pipe. After the electric rotating shaft rotates, the heat-conducting medium in the first pipe flows from the shunt pipe to the previous heating space.

[0020] Furthermore, a pumping mechanism is further included. The pumping mechanism includes a water pump, and a pumping pipe is connected to the water pump. Both ends of the pumping pipe are respectively communicated with the S-shaped flow channels in the top seat and the base seat.

[0021] Furthermore, the pumping mechanism further includes a motor and an electric telescopic rod. The output end of the electric telescopic rod is rotationally connected to a rotating rod. The output end of the motor is connected with a first bevel gear. Second bevel gears and third bevel gears are connected to both sides of the first bevel gear on the rotating rod. The rotating rod is key-slidably connected to the pump shaft of the water pump.

[0022] The telescopic movement of the electric telescopic rod can drive the two second bevel gears to alternately engage with the first bevel gear, so that the water pump can rotate forward or backward.

[0023] The pumping mechanism further includes a driving oil cylinder and a sliding seat. The driving oil cylinder is fixedly connected to the clamping mechanism. The sliding seat is slidably connected to the clamping mechanism. The sliding seat is N-shaped and abuts against the second bevel gear and the third bevel gear. The cylinder rod of the driving oil cylinder is fixedly connected to the sliding seat. A driven oil cylinder is fixedly connected to the fixed seat. An oil pipe is communicated between the driving oil cylinder and the driven oil cylinder.

[0024] The pumping mechanism further includes a branch pipe. A pressure valve is arranged on the branch pipe, and a small hydraulic rod is communicated at the end. The output end of the small hydraulic rod is connected with a rack. Teeth matching with the rack are arranged on the valve rod. When the small hydraulic rod is completely shortened, the rack does not contact the valve rod.

[0025] The beneficial effects of the present invention are analyzed as follows:

[0026] A method for testing the thermal performance of a plate-shaped phase change energy storage member, characterized by comprising the following steps:

[0027] S1. Put the sample into the cold box to cool down.

[0028] S2. Take out the sample from the cold box and put it into the thermal performance testing device. Set the base temperature t0, perform heat preservation treatment on the sample, and collect heat flux data and temperature data.

[0029] S3. When it is detected that the central temperature of the sample is consistent with the base temperature t0, keep the temperature constant for a time T b1For minutes, then increase the heating temperature to t0 + 1 °C and continue to maintain the temperature at a constant for T b1 minutes, and so on until the highest temperature t f ;

[0030] S4. After maintaining the temperature at a constant for T f minutes from t b2 start to cool down. The initial temperature is t f , reduce the heating temperature to t f - 1 °C, and maintain the temperature at a constant for T b1 minutes until the temperature of the thermal performance testing device reaches the base temperature t0.

[0031] The testing process covers a complete temperature cycle of cooling, heating, and then cooling again, simulating the temperature fluctuations that the plate - type phase - change energy - storage component may experience in actual building applications, making the test results more in line with the actual usage scenario. It is not necessary to break the plate - type phase - change energy - storage component, and it can effectively reflect the thermal performance of the component in the real environment; ensuring the accuracy of data collection: Set the constant - temperature time T b1 minutes at each temperature point (the same for the cooling process), and set the constant - temperature time T f minutes at the highest temperature t b2 to ensure that the sample reaches the thermal equilibrium state at this temperature. In this way, the collected heat - flux data and temperature data are more stable and accurate, effectively reducing the test error, and providing a reliable basis for subsequent analysis of thermal performance indicators such as phase - change temperature, phase - change latent heat, and specific heat capacity; By gradually changing the temperature and collecting data, the thermal performance changes of the plate - type phase - change energy - storage component at different temperature stages can be observed in detail, from the heat - absorption characteristics of the material during the heating process to the heat - release performance during the cooling process, comprehensively analyzing its phase - change process, and providing rich data support for in - depth research on the phase - change mechanism and heat - storage mechanism of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in related technologies, the following will briefly introduce the drawings required for use in the description of the specific embodiments or related technologies. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0033] Figure 1 is the overall structural schematic diagram of the present invention;

[0034] Figure 2 is the cross - sectional view of the present invention;

[0035] Figure 3 is the structural schematic diagram at the fixing seat of the present invention;

[0036] Figure 4 Structural schematic diagram of the valve stem of the present invention;

[0037] Figure 5 Structural schematic diagram of the heating mechanism of the present invention;

[0038] Figure 6 Structural schematic diagram of the pumping mechanism of the present invention;

[0039] Figure 7 Structural schematic diagram of the passive oil cylinder of the present invention;

[0040] Figure 8 Sample heating curve graph of the present invention;

[0041] Figure 9 Sample heat release curve graph of the present invention.

[0042] Icon:

[0043] 100, clamping mechanism; 110, heat preservation box; 120, box door; 130, base; 140, top seat; 150, fixed seat; 160, piston cylinder; 170, piston rod; 171, through hole; 180, cylinder; 181, round rod; 182, spring; 183, pull rope; 190, valve stem; 191, torsion spring; 200, heating mechanism; 210, heating cylinder; 220, electric rotating shaft; 230, partition board; 240, first pipeline; 241, shunt pipe; 242, four-way valve; 250, second pipeline; 260, pumping pipe; 300, pumping mechanism; 310, motor; 320, first bevel gear; 330, electric telescopic rod; 340, rotating rod; 350, second bevel gear; 360, third bevel gear; 370, water pump; 380, sliding seat; 381, cylinder rod; 390, active oil cylinder; 391, oil pipe; 392, branch pipe; 393, pressure valve; 394, passive oil cylinder; 395, small hydraulic rod; 396, rack. Detailed implementation manners

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments.

[0045] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0047] In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Embodiment 1

[0050] As Figures 1 - 7 shown, a thermal performance testing device for a plate-shaped phase change energy storage member includes a heating mechanism 200 and a clamping mechanism 100. The heating mechanism 200 includes a first pipeline 240; the clamping mechanism 100 includes a base 130 and a top seat 140. The clamping mechanism 100 includes a fixed seat 150. The top seat 140 is vertically slidably connected to the fixed seat 150. A piston cylinder 160 communicating with the first pipeline 240 is fixedly connected to the fixed seat 150. A piston rod 170 is slidably connected inside the piston cylinder 160. The bottom end of the piston rod 170 is fixedly connected to the top seat 140, and a through hole 171 is provided in the middle of the piston rod 170. The inner diameter of the first pipeline 240 is not greater than that of the through hole 171. When the heat-conducting medium flows from the through hole 171 to the first pipeline 240, the piston rod 170 moves downward so that the top seat 140 approaches the base 130.

[0051] The working mechanism of the thermal performance testing device for the plate-shaped phase change energy storage member provided in this embodiment:

[0052] Place the plate-shaped phase change energy storage component to be detected on the base 130, start the heating mechanism 200 to heat the base 130 and the top seat 140. The heat-conducting medium first flows into the base 130, and then enters the top seat 140. The top seat 140 is fixedly connected to the piston rod 170, and the heat-conducting medium in the top seat 140 flows into the piston cylinder 160 through the through hole 171 on the piston rod 170. Then, the heat-conducting medium in the piston cylinder 160 flows out through the first pipeline 240. The inner diameter of the first pipeline 240 is not greater than that of the through hole 171, and the flow rate of the first pipeline 240 is adjustable. By adjusting the flow rate of the first pipeline 240 to decrease, the speed of the heat-conducting medium entering the piston cylinder 160 is greater than the speed of the heat-conducting medium discharged through the first pipeline 240. Then, the heat-conducting medium accumulates in the piston cylinder 160. At this time, the piston rod 170 is pushed to move downward relative to the piston cylinder 160, so that the top seat 140 moves downward and presses the plate-shaped phase change energy storage component to be detected on the base 130. At this time, the upper and lower surfaces of the plate-shaped phase change energy storage component to be detected can respectively contact the top seat 140 and the base 130, so that heat is convenient to transfer. Using this test device to detect the heat storage performance of the plate-shaped phase change energy storage component to be detected does not require crushing the detected object, ensuring the integrity of the detected object. At the same time, the pressure generated by the flow of the heat-conducting medium can automatically press the top seat 140 on the plate-shaped phase change energy storage component to be detected, without manually adjusting the position of the top seat 140 according to the thickness of the plate-shaped phase change energy storage component to be detected, improving the detection efficiency.

[0053] Regarding how to avoid excessive pressure exerted by the top seat 140 on the plate-shaped phase change energy storage component to be detected, specifically:

[0054] The clamping mechanism 100 further includes a cylinder 180 connected to the piston cylinder 160. A round rod 181 is slidably connected in the cylinder 180. A valve is provided on the first pipeline 240. When the pressure in the piston cylinder 160 increases, the round rod 181 moves upward in the cylinder 180 and drives the valve to increase the opening degree.

[0055] The pressure in the piston cylinder 160 determines the pressure exerted by the top seat 140 on the plate-shaped phase change energy storage component to be detected. When the pressure in the piston cylinder 160 is too high, the pressure can push the round rod 181 in the piston cylinder 160 to move upward in the cylinder 180. At this time, the upward-moving round rod 181 can drive the valve to increase the opening degree, so that the outflow of the heat-conducting medium in the piston cylinder 160 increases, which also reduces the pressure in the piston cylinder 160, thus avoiding excessive pressure exerted by the top seat 140 on the plate-shaped phase change energy storage component to be detected, and ensuring that the soft plate-shaped phase change energy storage component to be detected will not be deformed due to excessive pressure, which may affect the detection of the heat storage performance and cause errors.

[0056] In an optional manner of this embodiment, preferably:

[0057] The clamping mechanism 100 further includes a torsion spring 191 connected between the valve stem 190 of the valve and the first pipe 240. A pull rope 183 is wound around the valve stem 190. The end of the pull rope 183 penetrates through the cylinder 180 and is fixedly connected to the round rod 181. A spring 182 is connected between the round rod 181 and the cylinder 180.

[0058] The spring 182 provides a downward thrust to the round rod 181, so that when the round rod 181 moves upward, it needs to overcome the elastic force of the spring 182, ensuring that enough pressure can be accumulated in the piston cylinder 160 to drive the top seat 140 to apply pressure to the plate-shaped phase change energy storage component to be detected. In the initial state, the valve has an incomplete opening. The torsion spring 191 applies a torsion force to the valve stem 190, so that the valve stem 190 has a rotational drive to further increase the opening of the valve. The two ends of the pull rope 183 are respectively wound and connected to the valve stem 190 and fixedly connected to the top of the round rod 181. When the pressure in the piston cylinder 160 increases, the round rod 181 can move upward, so that the pull rope 183 is released. While the pull rope 183 is retracted into the valve stem 190, the valve stem 190 can rotate under the action of the torsion spring 191 to increase the opening of the valve, thereby reducing the pressure in the piston cylinder 160 and further reducing the pressure of the top seat 140 on the plate-shaped phase change energy storage component to be detected.

[0059] Regarding the structure of the heating mechanism 200, specifically:

[0060] The heating mechanism 200 includes a heating cylinder 210. An electric rotating shaft 220 is rotatably connected inside the heating cylinder 210. A partition 230 is fixedly connected to the side wall of the electric rotating shaft 220. The partition 230 is attached to the inner wall of the heating cylinder 210. The partition 230 divides the heating cylinder 210 into multiple heating spaces, and the temperatures of the heat conduction media in the multiple heating spaces increase or decrease in a clockwise gradient.

[0061] Electric heating wires are arranged on the opposite surfaces of two adjacent partitions 230. These two groups of electric heating wires are activated to heat the heat conduction medium in the space between them. The multiple partitions 230 divide the heating cylinder 210 into multiple heating spaces. The power of the electric heating wires in each heating space is different and increases in a clockwise direction, so that the temperatures of the heat conduction media in the multiple heating spaces increase. When the plate-shaped phase change energy storage component to be detected is heated to the required temperature and undergoes heat preservation, the control system controls the electric rotating shaft 220 to rotate counterclockwise, so that the next heating space moves to the position of the previous heating space and takes over the previous heating space to supply the heat conduction medium to the top seat 140 and the base 130. By setting multiple heating spaces with increasing temperatures in the clockwise direction, the temperature rise control during the detection of the plate-shaped phase change energy storage component to be detected can respond more timely, reduce the waiting time for the heating medium to rise in temperature, and improve the detection efficiency.

[0062] In an alternative embodiment of the present invention, a more preferred one is:

[0063] The heating mechanism 200 further includes a second pipeline 250. Both the first pipeline 240 and the second pipeline 250 are connected to the heating cylinder 210. S-shaped flow channels for the flow of heat-conducting oil are provided in both the top seat 140 and the bottom seat 130.

[0064] The first pipeline 240 and the second pipeline 250 penetrate the outer wall of the heating cylinder 210 and are connected to the same heating space. When the electric rotating shaft 220 rotates, the heating space can synchronously move to the connection parts of the first pipeline 240 and the second pipeline 250 with the heating cylinder 210, so that the heat-conducting medium with an increased temperature subsequently can flow through the first pipeline 240 and the second pipeline 250 into the S-shaped flow channels in the top seat 140 and the bottom seat 130 for heat exchange with the plate-shaped phase change energy storage component to be detected;

[0065] When the temperature of the plate-shaped phase change energy storage component to be detected rises to the required temperature, the control system controls the electric rotating shaft 220 to rotate in the reverse direction, so that the temperature of the heat-conducting medium flowing into the top seat 140 and the bottom seat 130 gradually decreases to cool the plate-shaped phase change energy storage component to be detected.

[0066] In an alternative embodiment of the present example, preferably:

[0067] The heating mechanism 200 further includes a shunt pipe 241. The shunt pipe 241 is connected to the first pipeline 240. A four-way valve 242 is provided at the connection between the shunt pipe 241 and the first pipeline 240. The shunt pipe 241 is connected to the heating space adjacent to the first pipeline 240. After the electric rotating shaft 220 rotates, the heat-conducting medium in the first pipeline 240 flows through the shunt pipe 241 into the previous heating space.

[0068] There are two shunt pipes 241 (only one is shown in the figure, and the other is symmetrically arranged on the four-way valve 242). The two shunt pipes 241 are both connected to the four-way valve 242, and the two shunt pipes 241 are respectively communicated with the heating spaces on both sides of the heating space corresponding to the first pipe 240. Under normal circumstances, the first pipe 240 returns the heat-conducting medium to the heating space communicated with the second pipe 250. When the electric rotating shaft 220 rotates, the four-way valve 242 controls the returned heat-conducting medium to flow through the first pipe 240 and the shunt pipe 241. If the electric rotating shaft 220 rotates counterclockwise, enabling the high-temperature heat-conducting medium to take over the flow, the control system controls the operation of the four-way valve 242, so that the first pipe 240 is communicated with the shunt pipe 241 in the counterclockwise direction, so that the returned heat-conducting medium can flow back into the heating space at the corresponding temperature. A flow meter is also provided on the first pipe 240. When the flow meter detects that the flow rate of the heat-conducting medium reaches the volumes of the S-shaped flow channels of the top seat 140, the bottom seat 130, the first pipe 240, and the second pipe 250, the control system controls the four-way valve 242 to start, so that the heat-conducting medium returned by the first pipe 240 can enter the heating space where the second pipe 250 extracts the heat-conducting medium. When the electric rotating shaft 220 rotates clockwise, enabling the low-temperature heat-conducting medium to take over the flow, the control system controls the operation of the four-way valve 242, so that the first pipe 240 is communicated with the shunt pipe 241 in the clockwise direction, so that the returned heat-conducting medium can flow back into the heating space at the corresponding temperature. After the flow meter detects that the flow rate of the heat-conducting medium reaches the aforementioned equality, the control system controls the four-way valve 242 to start, so that the heat-conducting medium returned by the first pipe 240 can enter the heating space where the second pipe 250 extracts the heat-conducting medium, ensuring that the heat-conducting media in each heating space do not mix and cause a large temperature fluctuation.

[0069] Regarding the structure of the pumping mechanism 300, specifically:

[0070] The pumping mechanism 300 includes a water pump 370. A pumping pipe 260 is connected to the water pump 370. The two ends of the pumping pipe 260 are respectively communicated with the S-shaped flow channels in the top seat 140 and the bottom seat 130.

[0071] The S-shaped flow channels of the top seat 140 and the bottom seat 130 are communicated through the pumping pipe 260. The water pump 370 is connected to the pumping pipe 260. When the water pump 370 operates, a pressure difference is generated, enabling the heat-conducting medium to flow.

[0072] In an optional manner of this embodiment, preferably:

[0073] The pumping mechanism 300 further includes a motor 310 and an electric telescopic rod 330. The output end of the electric telescopic rod 330 is rotatably connected to a rotating rod 340. The output end of the motor 310 is connected to a first bevel gear 320. Second bevel gears 350 and third bevel gears 360 are connected to both sides of the rotating rod 340 where the first bevel gear 320 is located. The rotating rod 340 is key-slidably connected to the pump shaft of the water pump 370. The telescopic movement of the electric telescopic rod 330 can drive the two second bevel gears 350 to alternately mesh with the first bevel gear 320, so that the water pump 370 can rotate forward or backward.

[0074] A plurality of temperature probes and heat flux meters are loaded between the upper and lower surfaces of the sample and the base 130 and the top seat 140. The temperature probes can detect the temperatures of the top seat 140 and the contact parts between the base 130 and the plate-shaped phase change energy storage member. Since the heat conduction medium flows through the base 130 and then flows towards the top seat 140, there is a temperature difference between the base 130 and the top seat 140. After the temperature probe detects that the temperature of the contact part between the plate-shaped phase change energy storage member and the base 130 reaches the standard, if the temperature of the plate-shaped phase change energy storage member at the top seat 140 is lower than the temperature in contact with the base 130, the electric telescopic rod 330 extends, so that the third bevel gear 360 meshes with the first bevel gear 320. At this time, the water pump 370 rotates reversely, so that the flow direction of the heat conduction medium is changed to flow from the top seat 140 to the base 130. At this time, the heat conduction medium first exchanges heat with the upper part of the plate-shaped phase change energy storage member, prompting the upper part of the plate-shaped phase change energy storage member to quickly reach the required temperature. After the temperature of the upper part of the plate-shaped phase change energy storage member reaches the standard, the electric telescopic rod 330 shortens, so that the second bevel gear 350 meshes with the first bevel gear 320. At this time, the rotation direction of the water pump 370 is restored, so that the flow direction of the heat conduction medium is restored to flow from the base 130 to the top seat 140. After maintaining this flow direction state of the heat conduction medium for two minutes, the electric rotating shaft 220 rotates to perform the action of switching the heating space.

[0075] In an alternative embodiment of the present embodiment, preferably:

[0076] The pumping mechanism 300 further includes a main cylinder 390 and a sliding seat 380. The main cylinder 390 is fixedly connected to the clamping mechanism 100. The sliding seat 380 is slidably connected to the clamping mechanism 100. The sliding seat 380 is N-shaped and abuts against the second bevel gear 350 and the third bevel gear 360. The cylinder rod 381 of the main cylinder 390 is fixedly connected to the sliding seat 380. A passive cylinder 394 is fixedly connected to the fixed seat 150. An oil pipe 391 is communicated between the main cylinder 390 and the passive cylinder 394. The pumping mechanism 300 further includes a branch pipe 392. A pressure valve 393 is arranged on the branch pipe 392. The end is communicated with a small hydraulic rod 395. The output end of the small hydraulic rod 395 is connected to a rack 396. Teeth matching the rack 396 are arranged on the valve rod 190. When the small hydraulic rod 395 is completely shortened, the rack 396 does not contact the valve rod 190.

[0077] When the electric telescopic rod 330 extends so that the heat-conducting medium flows from the top seat 140 to the bottom seat 130, the second bevel gear 350 synchronously pushes the sliding seat 380 to slide. At this time, the sliding seat 380 pushes the cylinder rod 381 to slide into the active oil cylinder 390, so that the hydraulic oil in the active oil cylinder 390 flows into the passive oil cylinder 394. At this time, the passive oil cylinder 394 extends and abuts against the top seat 140, so that the relative position of the top seat 140 and the fixed seat 150 is fixed. After the passive oil cylinder 394 extends, the hydraulic rod in the active oil cylinder 390 continues to flow out. At this time, the pressure of the hydraulic oil breaks through the limit of the pressure valve 393 and flows to the small hydraulic rod 395. At this time, the rack 396 extends and meshes with the teeth on the valve rod 190, thereby driving the valve rod 190 to rotate, so that the opening of the valve increases to the maximum, so that the speed of the heat-conducting medium flowing into the piston cylinder 160 is equal to the speed of the heat-conducting medium discharged from the piston cylinder 160, thereby ensuring the flow rate of the heat-conducting medium, and at the same time making the top seat 140 continue to press on the upper part of the plate-shaped phase change energy storage component, ensuring the efficiency of heat exchange;

[0078] After the temperature of the plate-shaped phase change energy storage component reaches the standard, the electric telescopic rod 330 shortens, so that the active oil cylinder 390 extends, so that the passive oil cylinder 394 shortens and releases the fixation of the top seat 140. At the same time, the small hydraulic rod 395 shortens, so that the opening of the valve rod 190 is restored;

[0079] A tension spring is also connected between the top seat 140 and the fixed seat 150. After the operation of the water pump 370 is stopped, the tension spring pulls the top seat 140 to move up and reset. At this time, the box door 120 can be opened to take out the plate-shaped phase change energy storage component.

[0080] Embodiment Two

[0081] This embodiment provides a method for testing the thermal performance of a plate-shaped phase change energy storage component, which is applied to the device for testing the thermal performance of the plate-shaped phase change energy storage component described in Embodiment One, and includes the following steps:

[0082] S1. Place the sample in the cold box to cool down;

[0083] S2. Take out the sample from the cold box and put it into the thermal performance testing device, set the base temperature t0, perform heat preservation treatment on the sample, and collect heat flux data and temperature data;

[0084] S3. When it is detected that the central temperature of the sample is consistent with the base temperature t0, keep the temperature constant for T b1 minutes, then raise the heating temperature to t0 + 1°C, and continue to keep the temperature constant for T b1 minutes, and so on, until the highest temperature t f ;

[0085] S4. From t f Keep the temperature constant for T b2Cool down again after a certain number of minutes, with the initial temperature being t f , reduce the heating temperature to t f -1 °C, with a constant temperature time of T b1 minutes, until the central temperature of the sample reaches the base temperature t0.

[0086] S5. Collect temperature data to construct a visualization analysis chart of temperature rise and fall, and obtain the area in the visualization analysis chart of temperature rise and fall where the temperature fluctuation is less than the set fluctuation amplitude range as the stable state interval, and the temperature interval corresponding to the stable state interval is the phase change temperature interval;

[0087] S6. Collect heat flow data to construct a visualization analysis chart of heat absorption and release, and obtain the time region with the smallest heat fluctuation and the largest heat absorption in the visualization analysis chart of heat absorption and release as the latent heat of phase change region.

[0088] In this embodiment, the sample is placed in a cold box and cooled down to 2 °C, the extrusion temperature t0 is 5 °C. After the sample reaches 5 °C, the constant temperature time T b1 is 2 minutes, then the temperature is raised to 6 °C. When the central temperature of the sample is detected to be 6 °C, continue to keep the temperature constant for 2 minutes, then raise the temperature to 7 °C and continue to keep the temperature constant for 2 minutes, and so on until the highest temperature t f is 50 °C;

[0089] Set the T f temperature to 50 °C. Start keeping the temperature constant at 50 °C for T b2 for 10 minutes and then cool down. The temperature drops gradually with a temperature difference of 1 °C. After each 1 °C drop, keep the temperature constant for t b1 for 2 minutes and then continue to lower the temperature until the test ends when the temperature reaches the base extrusion temperature t0 of 5 °C;

[0090] Sort out and analyze the test data to obtain the phase change temperature, latent heat of phase change and specific heat capacity.

[0091] Among them, the phase change temperature is as Figure 8 shown, which is the process of change during the temperature rise from 17 °C to 18 °C;

[0092] The latent heat of phase change is as Figure 9 shown, which is the process of heat absorption / release of the sample during the phase change process from 17 °C to 18 °C. The heat fluctuation during the process from 17 °C to 18 °C is the smallest and the heat absorption is the largest;

[0093] The calculation of the specific heat capacity is the quotient of the total heat absorption from 2 °C to 50 °C minus the latent heat of phase change divided by the temperature difference 50 - 2 - (18 - 17) = 47 °C.

[0094] 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 them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A plate-shaped phase change energy storage building component thermal performance testing device, using a plate-shaped phase change energy storage building component thermal performance testing method, the testing method comprising: S1. Place the sample in a cold box to cool down; S2. Take out the sample from the cold box and put it into the thermal performance test device, set the basic temperature t0, keep the sample warm, and collect heat flow data and temperature data; S3. When it is detected that the center temperature of the sample is consistent with the basic temperature t0, the constant temperature time T b1 minutes, then increase the heating temperature to t0+1℃ and continue to keep the temperature constant T b1 minutes, and so on, until the maximum temperature t is reached f ; S4, from t f Constant temperature time T b2 After 10 minutes, the temperature is lowered again, and the initial temperature is t f , reduce the heating temperature to t f -1℃, constant temperature time T b1 minutes, until the center temperature of the sample returns to the base temperature t0; S5, collecting temperature data to construct a temperature rise and fall visualization analysis diagram, obtaining the area in the temperature rise and fall visualization analysis diagram where the temperature fluctuation is less than the set fluctuation amplitude range as the stable state interval, and the temperature interval corresponding to the stable state interval is the phase change temperature interval; S6, collecting heat flow data to construct a heat absorption and release visualization analysis diagram, obtaining the time area with the minimum heat fluctuation and the maximum heat absorption in the heat absorption and release visualization analysis diagram as the phase change latent heat zone, characterized in that: the testing device includes a heating mechanism and a clamping mechanism; The heating mechanism includes a first pipe; The clamping mechanism comprises a base, a top seat and a fixed seat which are arranged in sequence from bottom to top, the top seat is vertically slidably connected to the fixed seat, a piston cylinder which is connected to the first pipe is fixedly connected to the fixed seat, a piston rod is slidably connected in the piston cylinder, the bottom end of the piston rod is fixedly connected to the top seat, a through hole is opened in the middle of the piston rod, and the inner diameter of the first pipe is not larger than the through hole; When the heat-conducting medium flows from the through hole to the first pipeline, the piston rod moves downward so that the top seat is close to the base; The heating mechanism includes a heating cylinder, an electric shaft is rotatably connected inside the heating cylinder, a partition is fixedly connected to the side wall of the electric shaft, the partition is in contact with the inner wall of the heating cylinder, the partition divides the heating cylinder into a plurality of heating spaces, and the temperature of the heat-conducting medium in the plurality of heating spaces increases and decreases in a clockwise gradient.

2. The plate-shaped phase change energy storage building component thermal performance testing device according to claim 1 is characterized in that: The clamping mechanism also includes a cylinder connected to the piston cylinder, a round rod is slidably connected in the cylinder, a valve is arranged on the first pipeline, when the pressure in the piston cylinder increases, the round rod moves up on the cylinder and drives the valve to increase its opening.

3. The thermal performance testing device for plate-shaped phase change energy storage building components according to claim 2 is characterized in that: A torsion spring is arranged on the valve stem of the valve, a draw rope is wound on the valve stem, an end of the draw rope passes through the cylinder and is fixedly connected to the round rod, and a spring is connected between the round rod and the cylinder.

4. The plate-shaped phase change energy storage building component thermal performance testing device according to claim 3 is characterized in that: The heating mechanism also includes a second pipeline, the first pipeline and the second pipeline are both connected to the heating cylinder, and an S-shaped flow channel for the flow of heat transfer oil is opened in the top seat and the base.

5. The plate-shaped phase change energy storage building component thermal performance testing device according to claim 4 is characterized in that: The heating mechanism also includes a shunt pipe, which is connected to the first pipeline. A four-way valve is provided at the connection between the shunt pipe and the first pipeline. The shunt pipe is connected to the heating space adjacent to the first pipeline. After the electric shaft rotates, the heat-conducting medium in the first pipeline flows from the shunt pipe to the previous heating space.

6. The plate-shaped phase change energy storage building component thermal performance testing device according to claim 5, characterized in that: It also includes a pumping mechanism, which includes a water pump. The water pump is connected to a pumping pipe, and both ends of the pumping pipe are respectively connected to the top seat and the S-shaped flow channel in the base.

7. The plate-shaped phase change energy storage building component thermal performance testing device according to claim 6, characterized in that: The pumping mechanism also includes a motor and an electric telescopic rod, the output end of the electric telescopic rod is rotatably connected to a rotating rod, the output end of the motor is connected to a first bevel gear, the rotating rod is connected to a second bevel gear and a third bevel gear on both sides of the first bevel gear, and the rotating rod is slidably connected to a pump shaft key of the water pump; The extension and retraction of the electric telescopic rod can drive the two second bevel gears to alternately mesh with the first bevel gear, so that the water pump can rotate forward or reverse; The pumping mechanism further comprises an active oil cylinder and a slide seat, wherein the active oil cylinder is fixedly connected to the clamping mechanism, the slide seat is slidably connected to the clamping mechanism, the slide seat is N-shaped and abuts against the second bevel gear and the third bevel gear, the cylinder rod of the active oil cylinder is fixedly connected to the slide seat, a passive oil cylinder is fixedly connected to the fixed seat, and an oil pipe is connected between the active oil cylinder and the passive oil cylinder; The pumping mechanism also includes a branch pipe, which is provided with a pressure valve and connected to a small hydraulic rod at its end. The output end of the small hydraulic rod is connected to a rack, and the valve stem is provided with teeth that cooperate with the rack. When the small hydraulic rod is fully shortened, the rack does not contact the valve stem.

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