A fresh air heat recovery performance detection device with adjusting effect

Abstract

The application relates to the technical field of energy-saving detection, and discloses a fresh air heat recovery performance detection device with an adjusting effect, which comprises a wind pipe, a detector and two temperature and humidity probes are arranged in the wind pipe, an adjusting assembly is arranged in the wind pipe, the adjusting assembly comprises two winding rollers, a rotating shaft is rotatably arranged in the winding roller, and heat insulation coiled material is wound on the rotating shaft, the adjusting assembly further comprises a cleaning part used for cleaning the heat insulation coiled material, the adjusting assembly further comprises an edge pressing part used for pressing the two edges of the heat insulation coiled material. Through the arrangement of the adjusting assembly, the detector can automatically control the covering area of the heat insulation coiled material on the outer wall of the wind pipe according to the comparison between the heat recovery efficiency and the preset interval, the covering area is increased when the efficiency is too high, and the covering area is reduced when the efficiency is too low, so that the heat recovery efficiency can be accurately detected and dynamically adjusted, and the effect that the indoor temperature abnormity does not affect the comfort of personnel is achieved.

Description

Technical Field

[0001] This invention relates to the field of energy-saving testing technology, and specifically to a fresh air heat recovery performance testing device with regulating effect. Background Technology

[0002] In the field of fresh air heat recovery technology, a common approach is to achieve heat exchange by passing fresh air ducts through exhaust fan boxes. This type of heat recovery structure mainly consists of fresh air ducts, exhaust fan boxes, exhaust ducts, and fresh air ducts. The exhaust fan box serves as the core carrier for heat exchange, with an internal cavity for indoor exhaust air circulation. The fresh air duct passes through the cavity of the exhaust fan box in a through-type layout, with the outer wall of the duct in direct contact with the exhaust air inside the exhaust fan box. Its working principle is as follows: warm air exhausted from the room enters the exhaust fan box through the exhaust duct. During its flow within the fan box, the heat in the air is transferred to the fresh air inside the duct through the duct wall. Simultaneously, the fresh air continuously absorbs the heat transferred from the duct wall as it flows through the duct, achieving temperature regulation. The main purpose of this structure is to preheat the fresh air before it enters the room, reducing the energy consumption of subsequent indoor air conditioning systems and improving energy efficiency. It is widely used in residential and commercial buildings and other places requiring fresh air supply, helping to achieve the dual goals of indoor air renewal and energy conservation.

[0003] However, the existing technology has the following problems:

[0004] In existing fresh air heat recovery technologies, the heat exchange process between fresh air and indoor exhaust air is easily affected by fluctuations in ambient temperature. Outdoor temperature varies dynamically with day and night and seasonal changes, while indoor temperature fluctuates due to heat dissipation from electrical appliances and changes in the number of people. These two factors together cause the temperature difference between fresh air and exhaust air to be unstable, making it difficult to maintain a constant heat recovery efficiency. When the heat recovery efficiency is too high, the fresh air absorbs too much heat from the exhaust air, which can easily cause the indoor temperature to exceed the suitable range after entering the room. When the heat recovery efficiency is too low, the fresh air does not absorb enough heat, which may cause the indoor temperature to be lower than the comfort standard. Both situations will disrupt the stability of the indoor thermal environment, affect the comfort of people living or working, and make it difficult to meet the needs for precise control of indoor temperature. Summary of the Invention

[0005] The purpose of this invention is to provide a fresh air heat recovery performance testing device with regulating effect in order to solve the above-mentioned problems and overcome the defects of the prior art, as detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a fresh air heat recovery performance testing device with adjustable effect, comprising an air duct, wherein a detector and two temperature and humidity probes are installed inside the air duct, the two temperature and humidity probes being respectively installed on the inner wall of the air inlet and the inner wall of the air outlet of the air duct; an adjustment component is provided inside the air duct, the adjustment component comprising two winding drums, a rotating shaft being rotatably installed inside the winding drums, and a heat insulation roll being wound on the rotating shaft, one end of the heat insulation roll being connected to the rotating shaft, and the other end of the heat insulation roll being connected to a pull shaft, the adjustment component adjusting the coverage area of ​​the two heat insulation rolls on the outer wall of the air duct by the detector to adjust the heat recovery efficiency of the fresh air in the air duct; the adjustment component further comprises a cleaning section for cleaning the heat insulation roll; the adjustment component further comprises a pressing section for pressing down the two sides of the heat insulation roll.

[0008] Preferably, the two temperature and humidity probes are wirelessly connected to the detector. The two temperature and humidity probes detect the air temperature and humidity at the air inlet and outlet of the air duct, respectively, and transmit the temperature and humidity data to the detector. The detector calculates the fresh air heat recovery efficiency data.

[0009] Preferably, the adjusting assembly further includes a hydraulic cylinder installed inside the duct. The hydraulic cylinder is connected to a detector via a wire. The output end of the hydraulic cylinder is connected to a slotted shaft. A rotating ring is rotatably connected to the inner wall of the duct. A connecting frame is connected through the rotating ring. The duct has two through slots. The two ends of the connecting frame are slidably connected to the two through slots of the duct. The two ends of the connecting frame are connected to two pull shafts. When the connecting frame rotates, two thermal insulation rolls can be pulled out through the two pull shafts respectively. A circular hole is provided in the center of the connecting frame. The slotted shaft passes through the circular hole of the connecting frame. An inclined sliding groove is provided on the slotted shaft. A sliding tongue is installed on the inner wall of the circular hole of the connecting frame. The sliding tongue is slidably connected to the inclined sliding groove. When the slotted shaft moves, it can drive the connecting frame to rotate through the cooperation of the inclined sliding groove and the sliding tongue.

[0010] Preferably, the two ends of the rotating shaft pass through the two ends of the winding drum, and the two ends of the winding drum are respectively equipped with end caps. The inner wall of the end cap is provided with a coil spring, and the two ends of the coil spring are respectively connected to the rotating shaft and the inner wall of the end cap.

[0011] Preferably, a wiper blade is connected to the pull shaft, and the wiper blade contacts the outer wall of the air duct.

[0012] Preferably, there are two cleaning units, which are respectively installed on two take-up drums. Each cleaning unit includes two mounting seats, both of which are installed on the outer wall of the take-up drum. A rotating rod is rotatably installed on the two mounting seats, and a cleaning roller is connected to the outer wall of the rotating rod. The cleaning roller is in contact with the heat insulation roll material.

[0013] Preferably, the cleaning unit further includes two second gears, the two ends of the rotating shaft are respectively rotatably connected to the two end caps, the two second gears are respectively connected to the two ends of the rotating shaft, the two ends of the rotating rod are respectively connected to the first gears, the two first gears are respectively meshed with the two second gears, and scrapers are installed on the two mounting seats, the scrapers are in contact with the cleaning roller.

[0014] Preferably, there are two pressing parts, which are respectively installed on two take-up drums. Each pressing part includes two connecting arms, which are installed on the outer wall of the take-up drum. Each connecting arm is equipped with an mounting arm, and multiple springs are installed on the mounting arm. The end of each spring away from the mounting arm is connected to a wheel frame, and a roller is rotatably installed on the wheel frame. The multiple rollers on the mounting arm are arranged as a group, and the two groups of rollers can press the two sides of the thermal insulation roll tightly onto the air duct when the thermal insulation roll is pulled out.

[0015] Preferably, the mounting arm is provided with an arc-shaped groove, and two protruding rods are connected to the pull shaft. A sliding shaft is connected to the protruding rod. The two sliding shafts are slidably connected to the arc-shaped grooves on the two mounting arms respectively. The connecting arm is made of elastic material. When the sliding shaft moves away from the rotating shaft, it can drive the mounting arm to move away from the connecting arm through the arc-shaped groove.

[0016] The beneficial effects are:

[0017] 1. This adjustable fresh air heat recovery performance testing device, through the setup of a detector and two temperature and humidity probes, allows the two probes to capture the temperature and humidity of the fresh air at the air inlet and outlet of the duct in real time and transmit the data wirelessly. The detector calculates the fresh air heat recovery efficiency and connects to a host computer to remotely view the efficiency data and trace historical records, facilitating users to observe the fresh air heat recovery performance in real time. Through the setting of the adjustment component, the detector can automatically control the coverage area of ​​the thermal insulation roll on the outer wall of the duct based on the comparison between the heat recovery efficiency and the preset range. When the efficiency is too high, the coverage area is increased; when it is too low, the coverage area is reduced. This achieves accurate detection and dynamic adjustment of heat recovery efficiency, preventing abnormal indoor temperature from affecting the comfort of people.

[0018] 2. This fresh air heat recovery performance testing device with adjustment effect, through the setting of the cleaning section, enables the cleaning roller to rotate in the opposite direction to clean the surface impurities when the insulation roll is rolled up, and the scraper simultaneously scrapes off the impurities on the cleaning roller, thereby preventing the accumulation of impurities from affecting the flat winding and heat insulation performance of the insulation roll, and ensuring that the insulation roll is kept clean.

[0019] 3. This fresh air heat recovery performance testing device with adjustable function, through the setting of the pressing part, allows the roller to press the edge of the insulation roll tightly by the spring force when the insulation roll is pulled out, and the larger the pulled-out area, the stronger the pressing force, which avoids the edge of the insulation roll from curling up due to airflow impact, keeps the insulation roll tightly attached to the outer wall of the air duct, and thus ensures the heat insulation effect. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the detector structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the adjustment component structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the rotating ring structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the grooved shaft structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the thermal insulation roll structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the coil spring structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the cleaning section structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the cleaning roller structure of the present invention;

[0030] Figure 10 This is a schematic diagram of the pressing edge structure of the present invention;

[0031] Figure 11 This is a schematic diagram of the mounting arm structure of the present invention;

[0032] Figure 12 This is a schematic diagram of the sliding shaft structure of the present invention.

[0033] The annotations in the attached figures are explained as follows:

[0034] 1. Air ducts;

[0035] 2. Detector; 3. Temperature and humidity probe;

[0036] 4. Adjustment assembly; 41. Hydraulic cylinder; 42. Grooved shaft; 421. Inclined slide groove; 43. Rotary ring; 44. Connecting frame; 441. Sliding tongue; 45. Take-up drum; 46. Rotary shaft; 47. Thermal insulation roll; 48. Pull shaft; 49. End cap; 410. Coil spring; 411. Squeegee;

[0037] 5. Cleaning section; 51. Mounting base; 52. Rotating rod; 53. Cleaning roller; 54. First gear; 55. Second gear; 56. Scraper;

[0038] 6. Pressing edge; 61. Connecting arm; 62. Mounting arm; 63. Spring; 64. Wheel frame; 65. Roller; 66. Protruding rod; 67. Sliding shaft; 68. Arc groove. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0040] Example 1

[0041] When fresh air absorbs heat from the exhaust air, the temperature of the fresh air and exhaust air fluctuates due to differences in outdoor temperature at different times and changes in indoor temperature caused by factors such as electrical appliances and the number of people. Consequently, the heat recovery efficiency of the fresh air also fluctuates. Excessive heat recovery efficiency may lead to excessively high indoor temperature, while excessively low heat recovery efficiency may lead to excessively low indoor temperature. Both excessively high and low temperatures can cause discomfort to people indoors. This embodiment was invented to solve the above problems.

[0042] Please see Figure 1 - Figure 7A fresh air heat recovery performance testing device with regulating effect includes a duct 1, which is installed in an exhaust fan box. When fresh air flows through the duct 1, it absorbs the heat carried in the exhaust fan box. A detector 2 and two temperature and humidity probes 3 are installed inside the duct 1. The two temperature and humidity probes 3 are respectively installed on the inner walls of the air inlet and outlet of the duct 1. The two temperature and humidity probes 3 are wirelessly connected to the detector 2. The two temperature and humidity probes 3 detect the air temperature and humidity at the air inlet and outlet of the duct 1 and transmit the temperature and humidity data to the detector 2. The detector 2 calculates the fresh air heat recovery efficiency data. The two temperature and humidity probes 3 have built-in high-precision thermistors and capacitive humidity sensors. The temperature and humidity probe 3 at the air inlet captures the initial temperature and humidity of the outdoor fresh air entering the duct 1 in real time. The initial temperature and humidity are measured by the temperature and humidity probe 3 at the air outlet, which detects the temperature and humidity of the fresh air after heat recovery. The two temperature and humidity probes 3 wirelessly transmit the temperature and humidity data to the detector 2. The detector 2 has a built-in dedicated calculation module that can automatically calculate the current heat recovery efficiency data of the fresh air system based on the received temperature and humidity data from the air inlet and outlet. The detector 2 also has a connection function with a host computer. It can establish communication with a remote host computer wirelessly and transmit the real-time calculated fresh air heat recovery efficiency data to the host computer system. Through the host computer interface, the staff can not only observe the current heat recovery efficiency at any time, but also view historical data records, which facilitates remote monitoring, analysis and management of the fresh air system's operating status. The device's operating dynamics can be grasped without on-site supervision.

[0043] Furthermore, an adjustment assembly 4 is installed inside the duct 1. The adjustment assembly 4 is located on the straight sections of the duct 1, not at bends. The adjustment assembly 4 includes two winding drums 45, with a rotating shaft 46 rotatably mounted inside each drum. Insulation material 47 is wound around the rotating shaft 46. One end of the insulation material 47 is connected to the rotating shaft 46, and the other end is connected to a pull shaft 48. The adjustment assembly 4, controlled by the detector 2, adjusts the coverage area of ​​the two insulation materials 47 on the outer wall of the duct 1 to adjust the heat recovery efficiency of the fresh air inside the duct 1. The adjustment assembly 4 also includes a hydraulic cylinder 41, which is installed inside the duct 1 and connected to the detector 2 via a wire. The output of the hydraulic cylinder 41... The duct 1 is connected to a groove shaft 42 at one end, and a rotating ring 43 is rotatably connected to the inner wall of the duct 1. A connecting frame 44 is connected through the rotating ring 43. The duct 1 has two through slots, and the two ends of the connecting frame 44 are slidably connected to the two through slots of the duct 1 respectively. The two ends of the connecting frame 44 are connected to two pull shafts 48 respectively. When the connecting frame 44 rotates, two thermal insulation rolls 47 can be pulled out through the two pull shafts 48 respectively. A round hole is provided in the center of the connecting frame 44, and the groove shaft 42 passes through the round hole of the connecting frame 44. The groove shaft 42 is provided with an inclined sliding groove 421. A sliding tongue 441 is installed on the inner wall of the round hole of the connecting frame 44. The sliding tongue 441 is slidably connected to the inclined sliding groove 421. When the groove shaft 42 moves, it can move through the inclined sliding groove 421 and the groove shaft 44. The sliding tongue 441 engages to drive the connecting frame 44 to rotate. Since the indoor temperature needs to be maintained within a suitable range, a preset range for heat recovery efficiency is set in advance via the host computer. This preset range has an upper limit and a lower limit. When the detector 2 calculates that the heat recovery efficiency is higher than the upper limit, it indicates that the air heat inside the duct 1 is too high. At this time, the detector 2 sends an extension command to the hydraulic cylinder 41 via a wire. The output end of the hydraulic cylinder 41 pushes the groove shaft 42 to move axially. Because the inclined sliding groove 421 on the groove shaft 42 slides in conjunction with the sliding tongue 441 on the inner wall of the circular hole of the connecting frame 44, the linear motion of the groove shaft 42 is converted into the circular motion of the sliding tongue 441 through the inclined trajectory of the inclined sliding groove 421, thereby driving the connecting frame 44 to rotate. The central axis of ring 43 rotates, and the two ends of connecting frame 44 pass through the through groove of air duct 1 and are fixed to pull shaft 48. When rotating, it will simultaneously pull the two pull shafts 48 to move circumferentially along the outer wall of air duct 1. The pull shaft 48 drives the heat insulation roll 47 to be pulled out from the take-up drum 45. The rotating shaft 46 rotates as the heat insulation roll 47 is pulled out. The two heat insulation rolls 47 gradually cover part of the outer wall of air duct 1. As the coverage area of ​​heat insulation roll 47 increases, the heat exchange between air duct 1 and the external environment is blocked, and the heat absorbed by the fresh air flowing through air duct 1 is reduced. Thus, the heat recovery efficiency of fresh air in air duct 1 is reduced until the detector 2 detects that the efficiency returns to the preset range. Then, the hydraulic cylinder 41 is controlled to stop extending to maintain the current coverage area of ​​heat insulation roll 47.

[0044] Furthermore, the two ends of the rotating shaft 46 pass through the two ends of the winding drum 45, and end caps 49 are installed at the two ends of the winding drum 45. A coil spring 410 is provided on the inner wall of the end cap 49, and the two ends of the coil spring 410 are connected to the rotating shaft 46 and the inner wall of the end cap 49, respectively. When the detector 2 detects that the heat recovery efficiency is lower than a preset threshold, it indicates a risk of indoor temperature reduction, requiring an increase in heat recovery efficiency. At this time, the detector 2 sends a retraction command to the hydraulic cylinder 41. The piston rod of the hydraulic cylinder 41 pulls the groove shaft 42 to move in the opposite direction. The groove shaft 42 connects with the sliding tongue 441 through the inclined sliding groove 421. When the connecting frame 44 is reversed, it no longer applies tension to the pull shaft 48. At this time, the coil springs 410 on the inner walls of the end caps 49 at both ends of the take-up drum 45 use their elasticity to drive the rotating shaft 46 to rotate in the opposite direction. During the rotation of the rotating shaft 46, the heat insulation roll 47 is rewound into the take-up drum 45, which reduces the coverage area of ​​the heat insulation roll 47 and increases the exposed area of ​​the outer wall of the air duct 1. The fresh air flowing through the air duct 1 can absorb heat more fully, and the heat recovery efficiency gradually improves. When the efficiency reaches the preset range, the detector 2 controls the hydraulic cylinder 41 to stop contracting and maintain the current state.

[0045] In addition, a wiper blade 411 is connected to the pull shaft 48, and the wiper blade 411 contacts the outer wall of the air duct 1. During the operation of the air duct 1, due to the temperature difference between the inside and outside of the air duct 1, condensation droplets are easily formed on the outer wall of the air duct 1. When the pull shaft 48 moves along the outer wall of the air duct 1 under the drive of the connecting frame 44, it will simultaneously drive the wiper blade 411 to move. During the movement of the wiper blade 411, the condensation droplets on the outer wall can be completely scraped off, preventing the insulation roll 47 from being covered by water droplets after being pulled out, which would cause the water droplets to seep into the interior of the insulation roll 47 and affect its insulation performance.

[0046] Example 2

[0047] Based on Example 1, when the thermal insulation roll 47 covers the surface of the air duct 1, the air in the air duct 1 carries impurities, which cause impurities to adhere to the surface of the thermal insulation roll 47. After the impurities accumulate in the winding drum 45, they may affect the smooth winding of the thermal insulation roll 47, and may also cause the thermal insulation performance of the thermal insulation roll 47 to decrease. This embodiment is invented to solve the above problems.

[0048] Please see Figure 2 , Figure 8 - Figure 9The adjusting assembly 4 also includes a cleaning section 5 for cleaning the thermal insulation roll 47. Two cleaning sections 5 are provided, each mounted on a different winding drum 45. Each cleaning section 5 includes two mounting bases 51, both mounted on the outer wall of the winding drum 45. Rotating rods 52 are rotatably mounted on the two mounting bases 51, and cleaning rollers 53 are connected to the outer wall of the rotating rods 52. The cleaning rollers 53 contact the thermal insulation roll 47. When the thermal insulation roll 47 is wound into the winding drum 45 under the action of the coil spring 410, the cleaning rollers 53 maintain constant contact with the surface of the thermal insulation roll 47. During the winding process of the thermal insulation roll 47, the cleaning rollers 53 clean impurities adhering to the surface of the thermal insulation roll 47, preventing impurities from accumulating in the winding drum 45 and affecting the smooth winding of the thermal insulation roll 47. This also prevents long-term adhesion of impurities from causing a decrease in the thermal insulation performance of the thermal insulation roll 47, ensuring that the thermal insulation roll 47 remains clean each time it is unwound.

[0049] It is worth noting that the cleaning unit 5 also includes two second gears 55. The two ends of the rotating shaft 46 are respectively rotatably connected to two end caps 49. The two second gears 55 are respectively connected to the two ends of the rotating shaft 46. The two ends of the rotating rod 52 are respectively connected to first gears 54, and the two first gears 54 mesh with the two second gears 55. Scrapers 56 are mounted on the two mounting seats 51, and the scrapers 56 contact the cleaning roller 53. When the rotating shaft 46 rotates and winds up the heat insulation roll 47 under the drive of the coil spring 410, the second gears 55 fixed at both ends of the rotating shaft 46 will rotate synchronously with the rotating shaft 46. Because the first gears 54 and the second gears 55 interact... When meshed, the rotation of the second gear 55 drives the first gear 54 to rotate in the opposite direction, which in turn drives the cleaning roller 53 to rotate via the rotating rod 52. This gear transmission structure makes the rotation direction of the cleaning roller 53 exactly opposite to the winding rotation direction of the thermal insulation roll 47, increasing the relative motion speed and contact area between the cleaning roller 53 and the surface of the thermal insulation roll 47, so that the cleaning roller 53 can clean impurities more thoroughly. As the cleaning roller 53 continues to rotate, the scraper 56 comes into close contact with the surface of the cleaning roller 53, which can scrape off the impurities attached to the cleaning roller 53, preventing the impurities from re-contaminating the thermal insulation roll 47, and ensuring that the cleaning roller 53 always maintains a high cleaning efficiency.

[0050] Example 3

[0051] Based on Embodiment 2, when the thermal insulation roll 47 covers the outer wall of the air duct 1, the airflow impact generated by the airflow outside the air duct 1 may cause the edge of the thermal insulation roll 47 to curl up, thereby affecting the fit between the thermal insulation roll 47 and the air duct 1, and may also affect the normal winding of the thermal insulation roll 47. This embodiment is invented to solve the above problems.

[0052] Please see Figure 2 , Figure 10 - Figure 12The adjusting assembly 4 also includes a pressing edge part 6 for pressing down on both sides of the thermal insulation roll 47. Two pressing edge parts 6 are provided, each mounted on a different winding drum 45. Each pressing edge part 6 includes two connecting arms 61, mounted on the outer wall of the winding drum 45. Mounting arms 62 are mounted on the connecting arms 61, and multiple springs 63 are mounted on the mounting arms 62. A wheel frame 64 is connected to the end of each spring 63 away from the mounting arm 62. Rollers 65 are rotatably mounted on the wheel frame 64. The multiple rollers 65 on the mounting arms 62 are grouped together. When the thermal insulation roll 47 is pulled out, the two groups of rollers 65 can press both sides of the thermal insulation roll 47 tightly onto the duct 1. When the thermal insulation roll 47 is pulled out of the winding drum 45 by the connecting frame 44 and the pull shaft 48, the pull shaft 48 will... The roller 48 moves first to the area below roller 65. When the pull shaft 48 passes under roller 65, it pushes the wheel frame 64 upward, causing the spring 63 to compress and contract. After the pull shaft 48 has completely passed, the edge of the insulation roll 47 moves to the area below roller 65. At this time, the spring 63 releases its compressed elasticity, pushing the wheel frame 64 and roller 65 downward to reset, so that the roller 65 fits tightly against the edge surface of the insulation roll 47 and presses it firmly against the outer wall of the duct 1. Each set of rollers 65 is evenly distributed along the edge of the insulation roll 47, and the spring 63 can continuously provide stable pressure, which can effectively prevent the airflow impact generated when the airflow outside the duct 1 causes the edge of the insulation roll 47 to curl up, ensuring that the insulation roll 47 is always tightly fitted to the outer wall of the duct 1 without gaps, and ensuring stable insulation effect.

[0053] It is worth noting that the mounting arm 62 is provided with an arc-shaped groove 68, and two protruding rods 66 are connected to the pull shaft 48. Sliding shafts 67 are connected to the protruding rods 66, and the two sliding shafts 67 are slidably connected to the arc-shaped grooves 68 on the two mounting arms 62 respectively. The connecting arm 61 is made of elastic material. When the sliding shaft 67 moves away from the rotating shaft 46, it can drive the mounting arm 62 to move away from the connecting arm 61 through the arc-shaped groove 68. As the area of ​​the thermal insulation roll 47 being pulled out gradually increases, the pull shaft 48 will continuously move away from the rotating shaft 46. At the same time, the protruding rods 66 drive the sliding shaft 67 to slide along an arc-shaped trajectory within the arc-shaped groove 68 of the mounting arm 62. The end of the arc-shaped groove 68 away from the rotating shaft 46 tilts away from the connecting arm 61. During the sliding process, the sliding shaft 67 will exert a force against the inner wall of the arc-shaped groove 68. The thrust in the direction of spring 63, due to the elastic material of connecting arm 61, has a certain deformation capacity. Under the action of this thrust, mounting arm 62 will slightly deflect away from connecting arm 61. This deflection will further compress spring 63 on mounting arm 62, thereby increasing the pressure of spring 63 on wheel frame 64 and roller 65. This will increase the clamping force of roller 65 on the edge of insulation roll 47, so that the larger the area of ​​insulation roll 47 pulled out, the stronger the clamping force of the two sets of rollers 65. This allows for more powerful clamping when the area of ​​insulation roll 47 pulled out is large, and less clamping force when the area of ​​insulation roll 47 pulled out is small. This avoids the insulation roll 47 being subjected to large tensile forces for a long time due to excessive clamping force, thus shortening its service life.

[0054] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A fresh air heat recovery performance testing device with regulating effect, comprising an air duct (1), characterized in that: The air duct (1) is equipped with a detector (2) and two temperature and humidity probes (3), and the two temperature and humidity probes (3) are respectively installed on the inner wall of the air inlet and the inner wall of the air outlet of the air duct (1); An adjustment component (4) is provided inside the air duct (1). The adjustment component (4) includes two take-up drums (45). A rotating shaft (46) is rotatably installed inside the take-up drum (45). A heat insulation roll (47) is wound on the rotating shaft (46). One end of the heat insulation roll (47) is connected to the rotating shaft (46), and the other end of the heat insulation roll (47) is connected to a pull shaft (48). The adjustment component (4) adjusts the coverage area of ​​the two heat insulation rolls (47) on the outer wall of the air duct (1) by the control of the detector (2) in order to adjust the heat recovery efficiency of the fresh air in the air duct (1). The adjustment assembly (4) also includes a cleaning section (5) for cleaning the thermal insulation roll (47). The adjustment assembly (4) also includes a pressing edge (6) for pressing down both sides of the thermal insulation roll (47); The adjustment assembly (4) also includes a hydraulic cylinder (41), which is installed inside the air duct (1). The hydraulic cylinder (41) is connected to the detector (2) via a wire. The output end of the hydraulic cylinder (41) is connected to a slotted shaft (42). A rotating ring (43) is rotatably connected to the inner wall of the air duct (1). A connecting frame (44) is connected through the rotating ring (43). Two through slots are provided on the air duct (1). The two ends of the connecting frame (44) are slidably connected through the two through slots of the air duct (1). The two ends of the connecting frame (44) are connected to two pull shafts (48) respectively. The connecting frame (44) is connected in a manner that allows two heat insulation rolls (47) to be pulled out through two pull shafts (48) when the frame (44) rotates. A round hole is provided in the center of the connecting frame (44), and the groove shaft (42) passes through the round hole of the connecting frame (44). An inclined sliding groove (421) is provided on the groove shaft (42). A sliding tongue (441) is installed on the inner wall of the round hole of the connecting frame (44). The sliding tongue (441) is slidably connected to the inclined sliding groove (421). When the groove shaft (42) moves, it can drive the connecting frame (44) to rotate through the cooperation of the inclined sliding groove (421) and the sliding tongue (441). The two ends of the rotating shaft (46) pass through the two ends of the winding drum (45), and the two ends of the winding drum (45) are respectively equipped with end caps (49). The inner wall of the end cap (49) is provided with a coil spring (410), and the two ends of the coil spring (410) are respectively connected to the rotating shaft (46) and the inner wall of the end cap (49).

2. The fresh air heat recovery performance testing device with regulating effect according to claim 1, characterized in that: The two temperature and humidity probes (3) are wirelessly connected to the detector (2). The two temperature and humidity probes (3) respectively detect the air temperature and humidity at the air inlet and air outlet of the air duct (1) and transmit the temperature and humidity data to the detector (2). The detector (2) calculates the fresh air heat recovery efficiency data.

3. The fresh air heat recovery performance testing device with regulating effect according to claim 2, characterized in that: A wiper blade (411) is connected to the pull shaft (48), and the wiper blade (411) is in contact with the outer wall of the air duct (1).

4. The fresh air heat recovery performance testing device with regulating effect according to claim 2, characterized in that: There are two cleaning sections (5), which are respectively installed on two take-up drums (45). Each cleaning section (5) includes two mounting seats (51), which are installed on the outer wall of the take-up drum (45). A rotating rod (52) is rotatably installed on the two mounting seats (51). A cleaning roller (53) is connected to the outer wall of the rotating rod (52). The cleaning roller (53) is in contact with the heat insulation roll material (47).

5. The fresh air heat recovery performance testing device with regulating effect according to claim 4, characterized in that: The cleaning unit (5) also includes two second gears (55). The two ends of the rotating shaft (46) are respectively rotatably connected to the two end caps (49). The two second gears (55) are respectively connected to the two ends of the rotating shaft (46). The two ends of the rotating rod (52) are respectively connected to the first gears (54). The two first gears (54) mesh with the two second gears (55). The two mounting seats (51) are equipped with scrapers (56). The scrapers (56) are in contact with the cleaning roller (53).

6. The fresh air heat recovery performance testing device with regulating effect according to claim 2, characterized in that: Two pressing parts (6) are provided, and the two pressing parts (6) are respectively installed on two take-up drums (45). The pressing part (6) includes two connecting arms (61). The connecting arms (61) are installed on the outer wall of the take-up drum (45). The connecting arms (61) are equipped with mounting arms (62). Multiple springs (63) are installed on the mounting arms (62). The end of the springs (63) away from the mounting arms (62) is connected to a wheel frame (64). Rollers (65) are rotatably installed on the wheel frame (64). The multiple rollers (65) on the mounting arms (62) are set as a group. When the heat insulation roll (47) is pulled out, the two groups of rollers (65) can press the two sides of the heat insulation roll (47) onto the air duct (1).

7. A fresh air heat recovery performance testing device with regulating effect according to claim 6, characterized in that: The mounting arm (62) is provided with an arc groove (68), and two protruding rods (66) are connected to the pull shaft (48). A sliding shaft (67) is connected to the protruding rod (66). The two sliding shafts (67) are slidably connected to the arc grooves (68) on the two mounting arms (62). The connecting arm (61) is made of elastic material. When the sliding shaft (67) moves away from the rotating shaft (46), it can drive the mounting arm (62) to move away from the connecting arm (61) through the arc groove (68).

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