A phase change energy storage wall energy saving rate and comfort testing device and method

Abstract

The present invention relates to the field of phase change energy storage wall detection technology, and in particular to a method for testing the energy saving rate and comfort of a phase change energy storage wall, which is used to solve the problem that it is difficult to detect the energy saving rate and comfort of a phase change energy storage component in the prior art. The method places a reference sample and a phase change energy storage component in an environmental simulation box, and tests its comfort and energy saving effect through sinusoidal temperature changes. First, the temperature comfort is tested without constant temperature control, and the time period difference between the two in the comfort zone is compared; secondly, the power consumption is tested under constant temperature control, the energy saving amount and energy saving rate are calculated, and the average value of three test cycles is taken as the final result; through the testing method of the present invention, the energy saving rate and comfort of the phase change energy storage component during application can be directly tested, which solves the problem that it is difficult to detect the energy saving rate and comfort of the phase change energy storage component in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of phase change energy storage wall detection, and in particular to a phase change energy storage wall energy saving rate and comfort testing device and method. Background Art

[0002] Phase change energy storage components rely on their high energy storage capacity at a constant temperature. They have excellent characteristics in resisting external environmental thermal shock and utilizing natural energy and clean energy. They can reduce indoor environmental temperature fluctuations, increase thermal comfort, and reduce indoor energy consumption.

[0003] Although phase change energy storage components have many advantages, the energy saving rate and comfort level of such products are currently difficult to detect, which hinders the market application of phase change energy storage components. Summary of the invention

[0004] The present invention provides a method for testing energy saving rate and comfort level of a phase change energy storage wall, so as to solve the problem that it is difficult to detect energy saving rate and comfort level of a phase change energy storage component in the prior art.

[0005] In order to alleviate the above technical problems, the technical solution provided by the present invention is:

[0006] A method for testing energy saving rate and comfort of a phase change energy storage wall comprises the following steps:

[0007] S1. Place the reference sample and the phase change energy storage component into a sample test box in an environmental simulation box respectively;

[0008] S2. Set the temperature of the environmental simulation box to change from 10 to 40°C in a sinusoidal wave, with 24 hours as one sinusoidal wave cycle. Turn off the constant temperature mechanism of the sample test box and start the test.

[0009] S3. Test three sine wave cycles, record the test data of each temperature sensor, set the temperature range of 18~25℃ as the comfort zone, the temperature comfort zone time period in the sample test box where the reference sample is placed is △t1+△t2, and the temperature in the sample test box where the phase change energy storage component is placed is in the comfort zone time period is △t3;

[0010] The temperature comfort of the phase change energy storage component is:

[0011] COM=[△t3-(△t1+△t2)] / (△t1+△t2)×100%;

[0012] in:

[0013] △t1: duration of time that the sample test box (120) containing the reference sample reaches the set comfort zone temperature range for the first time;

[0014] △t2: the duration of time that the sample test box (120) containing the reference sample reaches the set comfort zone temperature range for the second time.

[0015] Furthermore, the testing method further comprises the following steps:

[0016] S1. Set the temperature of the environmental simulation box to change from 10 to 40℃ in a sinusoidal wave, with 24 hours as one sinusoidal wave cycle. Turn on the constant temperature mechanism of the sample test box and set the temperature to 22℃ to start the test.

[0017] S2. Test three sine wave cycles, record the real-time test data of each meter, extract the power consumption Q1 of the sample test box with the reference sample and the power consumption Q2 of the sample test box with the phase change energy storage component in one test cycle, calculate the energy saving of the phase change energy storage component Q3=Q1-Q2, the energy saving rate of the phase change energy storage component η1=Q3 / Q1×100%, calculate the average energy saving rate of η1, η2 and η3 of the three test cycles, and take the energy saving of the phase change energy storage component as:

[0018] η=(η1+η2+η3) / 3.

[0019] A phase-change energy storage wall energy saving rate and comfort test device, the test device is applied to the phase-change energy storage wall energy saving rate and comfort test method, including a simulation mechanism, a data acquisition mechanism, a data processing mechanism, a control mechanism and a constant temperature mechanism;

[0020] The simulation mechanism includes an environmental simulation box and two sample test boxes arranged inside the environmental simulation box, one of the sample test boxes is used to place a reference sample, and the other is used to place a phase change energy storage component, and the environmental simulation box is used to simulate the harmonic frequency change of outdoor air temperature;

[0021] The constant temperature mechanism is used to control the internal temperature of the two sample test boxes, the data acquisition mechanism is used to collect the temperature inside the simulation mechanism and the power consumption of the constant temperature mechanism, the data processing mechanism is used to process the data collected by the data acquisition mechanism, and the control mechanism is used to control the constant temperature mechanism according to the data processed by the data processing mechanism and the set value.

[0022] Furthermore, the data acquisition mechanism includes three temperature sensors arranged in the two sample test boxes and the environmental simulation box, and an electricity meter for measuring the power consumption of the two constant temperature mechanisms.

[0023] Furthermore, a first box cover is provided on a side of the environmental simulation box, and a second box cover is provided on a side of the two sample test boxes.

[0024] Furthermore, trumpet-shaped grooves are provided on the opposite surfaces of the second box cover and the sample test box.

[0025] Furthermore, the constant temperature mechanism includes a hot and cold air blower, the hot and cold air blower is connected to an air duct, one end of the air duct is connected to an air nozzle, and the other end of the air duct and the air nozzle are respectively connected to the middle of the two trumpet-shaped grooves.

[0026] Furthermore, a bracket is connected inside the air nozzle, a sliding rod is slidably connected to the middle of the bracket, and a conical block is connected to the end of the sliding rod. When the air outlet temperature of the hot and cold air blower increases, the conical block approaches the opening of the air nozzle, so that the air blown by the air nozzle diverges.

[0027] Furthermore, a tension spring is sleeved on the slide rod, and two ends of the tension spring are respectively connected to the bracket and the conical block;

[0028] A bimetallic strip is fixedly connected inside the air nozzle, and the bimetallic strip is radially inserted into the sliding rod. When the temperature inside the air duct rises, the bimetallic strip is deformed and pulls the conical block close to the air nozzle.

[0029] Furthermore, the constant temperature mechanism also includes a piston cylinder, a pressurized pipe is connected between the piston cylinder and the air duct, the environmental simulation box is connected to a cylinder, the output end of the cylinder is connected to a piston plate, the piston plate slides on the piston cylinder, and when the outlet temperature of the hot and cold air blower increases, the cylinder extends to increase the corresponding air pressure in the sample test box.

[0030] The beneficial effects of the present invention are analyzed as follows:

[0031] A method for testing energy saving rate and comfort of a phase change energy storage wall comprises the following steps: S1, respectively placing a reference sample and a phase change energy storage component into a sample test box in an environmental simulation box; S2, setting the temperature of the environmental simulation box to change from 10 to 40°C in a sinusoidal wave, with 24 hours as one sinusoidal wave cycle, closing the constant temperature mechanism of the sample test box, and starting the test; S3, testing three sinusoidal wave cycles, recording the test data of each temperature sensor, setting the temperature range of 18 to 25°C as a comfort zone, the temperature comfort zone time period in the sample test box where the reference sample is placed is △t1+△t2, and the temperature in the sample test box where the phase change energy storage component is placed is in the comfort zone time period is △t3; the temperature comfort of the phase change energy storage component is: COM=[△t3-(△t1+△t2)] / (△t1+△t2)×100%;

[0032] The test method also includes the following steps: S1. Set the temperature of the environmental simulation box to change from 10 to 40°C in a sinusoidal wave, with 24 hours as one sinusoidal wave cycle, turn on the constant temperature mechanism of the sample test box and set the temperature to 22°C to start the test; S2. Test three sinusoidal wave cycles, record the real-time test data of each electric meter, extract the power consumption Q1 of the sample test box where the reference sample is placed and the power consumption Q2 of the sample test box where the phase change energy storage component is placed in one test cycle, calculate the energy saving of the phase change energy storage component Q3=Q1-Q2, the energy saving rate of the phase change energy storage component η1=Q3 / Q1×100%, calculate the average energy saving rate of η1, η2 and η3 of the three test cycles, and the energy saving of the phase change energy storage component is: η=(η1+η2+η3) / 3.

[0033] The testing method of the present invention can directly test the energy saving rate and comfort level of the phase change energy storage component during its application, thus solving the problem that it is difficult to detect the energy saving rate and comfort level of the phase change energy storage component in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0036] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0037] Figure 3 is a cross-sectional view of the present invention;

[0038] Figure 4 It is a structural schematic diagram of a sample test box of the present invention;

[0039] Figure 5 It is a structural schematic diagram of the second box cover of the present invention;

[0040] Figure 6 It is a structural schematic diagram of the constant temperature mechanism of the present invention;

[0041] Figure 7 It is a structural schematic diagram of the air nozzle of the present invention;

[0042] Figure 8 It is the temperature variation curve diagram of the environmental box and the test box of the present invention;

[0043] Fig. 9 This is a curve diagram of the power consumption of the test box of the present invention.

[0044] icon:

[0045] 100, simulation mechanism; 110, environmental simulation box; 111, first box cover; 120, sample test box; 121, second box cover; 122, trumpet-shaped groove; 200, data acquisition mechanism; 210, temperature sensor; 220, electricity meter; 300, control mechanism; 400, data processing mechanism; 500, constant temperature mechanism; 510, hot and cold air blower; 520, air duct; 530, air nozzle; 531, sliding rod; 532, conical block; 533, tension spring; 534, bracket; 535, bimetallic strip; 540, piston cylinder; 541, pressurized pipe; 550, cylinder; 560, piston plate. DETAILED DESCRIPTION

[0046] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Examples, such as Figure 1-Figure 7As shown, a phase change energy storage wall energy saving rate and comfort test device includes a simulation mechanism 100, a data acquisition mechanism 200, a data processing mechanism 400, a control mechanism 300 and a constant temperature mechanism 500; the simulation mechanism 100 includes an environmental simulation box 110, two sample test boxes 120 arranged inside the environmental simulation box 110, one of the sample test boxes 120 is used to place a reference sample, and the other is used to place a phase change energy storage component, and the environmental simulation box 110 is used to simulate the harmonic frequency change of outdoor air temperature; the constant temperature mechanism 500 is used to control the internal temperature of the two sample test boxes 120, the data acquisition mechanism 200 is used to collect the temperature in the simulation mechanism 100 and the power consumption of the constant temperature mechanism 500, the data processing mechanism 400 is used to process the data collected by the data acquisition mechanism 200, and the control mechanism 300 is used to control the constant temperature mechanism 500 according to the data processed by the data processing mechanism 400 and the set value.

[0050] The working mechanism of the test device provided in this embodiment is as follows:

[0051] The environmental simulation box 110 is used to simulate the harmonic frequency changes of the outdoor temperature. A pipeline is set on the inner wall of the environmental simulation box 110. The temperature inside the environmental simulation box 110 is controlled by passing cold / hot liquid media into the pipeline. The flow of the medium and the temperature selection are also controlled by the control mechanism 300. Two sample test boxes 120 are both set in the environmental simulation box 110, and are used to place reference samples and phase change energy storage components respectively. The constant temperature mechanism 500 can maintain the temperature in the two sample test boxes 120 within the required range. Among them, the data acquisition mechanism 200 is used to obtain the temperature in the environmental simulation box 110 and the sample test box 120 and the power consumption of the constant temperature mechanism 500, and then the control mechanism 300 controls the operation of the constant temperature mechanism 500 or the flow of the above-mentioned cold / hot media through the temperature data.

[0052] Among the optional methods of this embodiment, the more preferred ones are:

[0053] The data collection mechanism 200 includes three temperature sensors 210 disposed in two sample test boxes 120 and the environmental simulation box 110 , and an electricity meter 220 for measuring the power consumption of the two constant temperature mechanisms 500 .

[0054] The data acquisition mechanism 200 collects the internal temperature of the two sample test boxes 120 and the internal temperature of the environmental simulation box 110 through the temperature sensor 210. The power meter 220 is used to detect the power consumption of the two constant temperature mechanisms 500, and the energy consumption required to maintain the internal temperature of the two sample test boxes 120 is obtained based on the power consumption.

[0055] Among the optional methods of this embodiment, the more preferred ones are:

[0056] The environmental simulation box 110 is provided with a first box cover 111 , and the two sample test boxes 120 are both provided with a second box cover 121 .

[0057] After opening the first box cover 111 and the second box cover 121 , the reference sample and the phase-change energy storage component can be placed in the two sample test boxes 120 , respectively.

[0058] Among the optional methods of this embodiment, the more preferred ones are:

[0059] Trumpet-shaped grooves 122 are provided on the opposite surfaces of the second box cover 121 and the sample test box 120; the constant temperature mechanism 500 includes a hot and cold air blower 510, to which an air duct 520 is connected, one end of the air duct 520 is connected to an air nozzle 530, and the other end of the air duct 520 and the air nozzle 530 are respectively connected to the middle parts of the two trumpet-shaped grooves 122.

[0060] The setting of the trumpet-shaped groove 122 allows the hot air blown out by the hot and cold air blower 510 to diffuse along its inner wall, so that the heat can be better distributed inside the sample test box 120. The trumpet-shaped groove 122 on the second box cover 121 guides the blown hot air, making it easier for the heat in the sample test box 120 to circulate.

[0061] Regarding the structure of the air nozzle 530, specifically:

[0062] A bracket 534 is connected inside the air nozzle 530, a sliding rod 531 is slidably connected to the middle of the bracket 534, and a conical block 532 is connected to the end of the sliding rod 531. When the air outlet temperature of the hot and cold air blower 510 increases, the conical block 532 approaches the opening of the air nozzle 530, so that the air nozzle 530 blows air in a dispersed manner.

[0063] When the temperature sensor 210 detects that the temperature in the corresponding sample test box 120 drops, or when it is just activated in a low temperature environment, the control mechanism 300 controls the hot and cold air blowers 510 to blow out hot air. At this time, the conical block 532 approaches the direction of the wind nozzle 530 but does not block the wind nozzle 530, so that the wind blown out of the wind nozzle 530 becomes divergent after being guided by the conical block 532. The divergent hot air is then guided by the trumpet-shaped groove 122 to circulate inside the sample test box 120. After the hot air is dispersed, the range in which it is blown to the sample test box 120 is increased, thereby ensuring that the temperature inside the sample test box 120 quickly rises to the required range.

[0064] Among the optional methods of this embodiment, the more preferred ones are:

[0065] A tension spring 533 is sleeved on the slide bar 531, and the two ends of the tension spring 533 are respectively connected to the bracket 534 and the conical block 532; a bimetallic strip 535 is fixedly connected to the air nozzle 530, and the bimetallic strip 535 is radially inserted into the slide bar 531. When the temperature in the air duct 520 rises, the bimetallic strip 535 deforms and pulls the conical block 532 close to the air nozzle 530.

[0066] The tension spring 533 provides a pulling force for the conical block 532, so that the conical block 532 has a tendency to approach the air nozzle 530. When the temperature in the air duct 520 does not rise, the bimetallic strip 535 does not deform, or its deformation degree is low. At this time, the bimetallic strip 535 has a greater thrust on the slide bar 531, so that the distance between the conical block 532 and the air nozzle 530 is larger. At this time, the wind blown out by the air nozzle 530 has a small degree of divergence. When the temperature in the air duct 520 rises, the bimetallic strip 535 is deformed by heat, and the thrust on the slide bar 531 is reduced, so that the tension spring 533 pulls the conical block 532 close to the air outlet of the air nozzle 530, so that the hot air is blown into the sample test box 120.

[0067] Among the optional methods of this embodiment, the more preferred ones are:

[0068] The constant temperature mechanism 500 also includes a piston cylinder 540, and a pressurized pipe 541 is connected between the piston cylinder 540 and the air duct 520. A cylinder 550 is connected to the environmental simulation box 110, and the output end of the cylinder 550 is connected to a piston plate 560. The piston plate 560 slides on the piston cylinder 540. When the outlet temperature of the hot and cold air blower 510 increases, the cylinder 550 extends to increase the air pressure in the corresponding sample test box 120.

[0069] The sample test box 120 is airtight. When the hot and cold air blower 510 blows out hot air, the cylinder 550 extends synchronously, so that the air in the piston cylinder 540 is pushed into the sample test box 120, so that the air pressure in the sample test box 120 increases, so that the collision between gas molecules becomes more frequent, so that the heat transfer between gas molecules becomes faster, and the temperature rise speed of the space in the sample test box 120 is accelerated;

[0070] When the required temperature is reached, the control mechanism 300 controls the cylinder 550 to shrink and reset according to the data of the temperature sensor 210.

[0071] Reference Figure 8 , a comfort test method of a phase change energy storage wall energy saving rate and comfort test device, comprising the following steps:

[0072] S1, respectively placing the reference sample and the phase change energy storage component into the sample test box 120 in the environmental simulation box 110;

[0073] S2, set the temperature of the environmental simulation box 110 to change from 10 to 40°C in a sinusoidal wave, with 24 hours as one sinusoidal wave cycle, close the constant temperature mechanism 500 of the sample test box 120, and start the test;

[0074] S3, test three sine wave cycles, record the test data of each temperature sensor 210, set the temperature range of 18~25℃ as the comfort zone, the temperature comfort zone time period in the sample test box 120 where the reference sample is placed is △t1+△t2, and the temperature in the sample test box 120 where the phase change energy storage component is placed is in the comfort zone time period is △t3;

[0075] The temperature comfort of the phase change energy storage component is:

[0076] COM=[△t3-(△t1+△t2)] / (△t1+△t2)×100%.

[0077] Reference Fig. 9 , a method for testing energy saving rate of a phase change energy storage wall energy saving rate and comfort test device, comprising the following steps:

[0078] S1. Set the temperature of the environmental simulation box 110 to change from 10 to 40°C in a sinusoidal wave, with 24 hours as one sinusoidal wave cycle. Turn on the constant temperature mechanism 500 of the sample test box 120 and set the temperature to 22°C to start the test.

[0079] S2. Test three sine wave cycles, record the real-time test data of each meter, extract the power consumption Q1 of the sample test box 120 with the reference sample and the power consumption Q2 of the sample test box 120 with the phase change energy storage component placed in one test cycle, calculate the energy saving of the phase change energy storage component Q3=Q1-Q2, the energy saving rate of the phase change energy storage component η1=Q3 / Q1×100%, calculate the average energy saving rate of η1, η2 and η3 of the three test cycles, and take the energy saving of the phase change energy storage component as:

[0080] η=(η1+η2+η3) / 3.

[0081] 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 above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for testing energy saving rate and comfort of phase change energy storage wall, characterized in that: The comfort measurement method includes the following steps: S1, placing the reference sample and the phase change energy storage component into a sample test box (120) in an environmental simulation box (110); S2, setting the temperature of the environmental simulation box (110) to change in a sinusoidal wave from 10 to 40°C, with 24 hours as one sinusoidal wave cycle, closing the constant temperature mechanism (500) of the sample test box (120), and starting the test; S3, testing three sine wave cycles, recording the test data of each temperature sensor (210), setting the temperature range of 18-25°C as the comfort zone, the temperature comfort zone time period in the sample test box (120) where the reference sample is placed is △t1+△t2, and the temperature comfort zone time period in the sample test box (120) where the phase change energy storage component is placed is △t3; The temperature comfort of the phase change energy storage component is: COM=[△t3-(△t1+△t2)] / (△t1+△t2)×100%; in: △t1: duration of time that the sample test box (120) containing the reference sample reaches the set comfort zone temperature range for the first time; △t2: duration of time that the sample test box (120) containing the reference sample reaches the set comfort zone temperature range for the second time; The energy saving rate test method includes the following steps: S1. Set the temperature of the environmental simulation box (110) to change from 10 to 40°C in a sinusoidal wave, with 24 hours as one sinusoidal wave cycle. Turn on the constant temperature mechanism (500) of the sample test box (120) and set the temperature to 22°C to start the test. S2. Test three sine wave cycles, record the real-time test data of each electric meter, extract the power consumption Q1 of the sample test box (120) where the reference sample is placed and the power consumption Q2 of the sample test box (120) where the phase change energy storage component is placed in one test cycle, calculate the energy saving of the phase change energy storage component Q3=Q1-Q2, the energy saving rate of the phase change energy storage component η1=Q3 / Q1×100%, calculate the average energy saving rate of the three test cycles η1, η2 and η3, and take the energy saving of the phase change energy storage component as: η=(η1+η2+η3) / 3.

2. A phase change energy storage wall energy saving rate and comfort test device, the test device is applied to the phase change energy storage wall energy saving rate and comfort test method according to claim 1, characterized in that: It comprises a simulation mechanism (100), a data acquisition mechanism (200), a data processing mechanism (400), a control mechanism (300) and a constant temperature mechanism (500); The simulation mechanism (100) comprises an environmental simulation box (110) and two sample test boxes (120) arranged inside the environmental simulation box (110), wherein one of the sample test boxes (120) is used to place a reference sample, and the other is used to place a phase change energy storage component, and the environmental simulation box (110) is used to simulate harmonic frequency changes of outdoor air temperature; The constant temperature mechanism (500) is used to control the internal temperature of the two sample test boxes (120); the data acquisition mechanism (200) is used to collect the temperature in the simulation mechanism (100) and the power consumption of the constant temperature mechanism (500); the data processing mechanism (400) is used to process the data collected by the data acquisition mechanism (200); and the control mechanism (300) is used to control the constant temperature mechanism (500) according to the data processed by the data processing mechanism (400) and the set value.

3. The phase change energy storage wall energy saving rate and comfort testing device according to claim 2 is characterized in that: The data acquisition mechanism (200) comprises three temperature sensors (210) arranged in the two sample test boxes (120) and the environmental simulation box (110), and an electric quantity measuring instrument (220) for measuring the electric quantity consumed by the two constant temperature mechanisms (500).

4. The phase change energy storage wall energy saving rate and comfort testing device according to claim 3 is characterized in that: The environmental simulation box (110) is provided with a first box cover (111) on its side, and the two sample test boxes (120) are both provided with a second box cover (121) on their sides.

5. The phase change energy storage wall energy saving rate and comfort testing device according to claim 4 is characterized in that: A trumpet-shaped groove (122) is provided on the opposing surfaces of the second box cover (121) and the sample test box (120).

6. The phase change energy storage wall energy saving rate and comfort testing device according to claim 5 is characterized in that: The constant temperature mechanism (500) comprises a hot and cold air blower (510), the hot and cold air blower (510) being connected to an air duct (520), one end of the air duct (520) being connected to an air nozzle (530), and the other end of the air duct (520) and the air nozzle (530) respectively passing through and connected to the middle parts of the two trumpet-shaped grooves (122).

7. The phase change energy storage wall energy saving rate and comfort testing device according to claim 6 is characterized in that: A bracket (534) is connected inside the air nozzle (530), a sliding rod (531) is slidably connected to the middle of the bracket (534), and a conical block (532) is connected to the end of the sliding rod (531); when the outlet air temperature of the hot and cold air blower (510) increases, the conical block (532) moves closer to the opening of the air nozzle (530), so that the air nozzle (530) blows air in a dispersed manner.

8. The phase change energy storage wall energy saving rate and comfort testing device according to claim 7 is characterized in that: A tension spring (533) is sleeved on the sliding rod (531), and two ends of the tension spring (533) are respectively connected to the bracket (534) and the conical block (532); A bimetallic strip (535) is fixedly connected inside the air nozzle (530), and the bimetallic strip (535) is radially plugged into the sliding rod (531). When the temperature inside the air duct (520) increases, the bimetallic strip (535) deforms and pulls the conical block (532) closer to the air nozzle (530).

9. The phase change energy storage wall energy saving rate and comfort testing device according to claim 8, characterized in that: The constant temperature mechanism (500) further comprises a piston cylinder (540), a pressurizing pipe (541) being connected between the piston cylinder (540) and the air duct (520), a cylinder (550) being connected to the environmental simulation box (110), an output end of the cylinder (550) being connected to a piston plate (560), the piston plate (560) sliding on the piston cylinder (540), and when the outlet air temperature of the hot and cold air blower (510) increases, the cylinder (550) is extended so that the air pressure in the corresponding sample test box (120) increases.

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