Fresh air heat recovery performance detection device with adjusting effect

Abstract

The utility model discloses a fresh air heat recovery performance detection device with an adjusting effect, which relates to the technical field of energy-saving detection and comprises a fresh air heat recovery unit and a total heat exchange module mounted in the fresh air heat recovery unit. A fresh air outlet air pipe is installed on the fresh air heat recovery unit, an exhaust air inlet air pipe is installed on the fresh air heat recovery unit, and an exhaust air outlet air pipe is installed on the fresh air heat recovery unit. According to the utility model, through the arrangement of the data acquisition instrument, the fresh air heat recovery performance detection device with an adjusting effect can conveniently acquire data on site, start the fresh air heat recovery device, measure air thermal parameters after a fresh air handling unit works stably, and test the air speed of an air pipe at a fresh air inlet according to the requirements of Public Building Energy-saving Detection Standard JGJ / T 177-2009; and the electronic computer calculates the fresh air volume of the fresh air heat recovery unit according to a test result, and performs field detection on the performance of the fresh air heat recovery device.

Description

Technical Field

[0001] The utility model relates to the technical field of energy-saving detection, in particular to a fresh air heat recovery performance detection device with a regulating effect. Background Art

[0002] Building energy conservation is an important path to achieve the goal of carbon neutrality in the construction industry. In order to reduce the energy consumption of building operation, the country has promulgated a series of energy-saving standards, all of which have put forward higher requirements for the overall air tightness of the building envelope structure. This means that during use, the traditional window ventilation mode should be gradually replaced by fresh air units to provide fresh air for the building. Therefore, the performance test of the fresh air heat recovery device is an important part of ensuring the energy-saving effect of the building. The "Technical Standard for Nearly Zero Energy Buildings" GB / T 51350-2019 proposes the test requirements for the fresh air heat recovery unit. The performance of the fresh air heat recovery device should be tested and should comply with the following regulations:

[0003] 1) For heat recovery devices with a rated air volume greater than 3000m3 / h, on-site testing should be carried out.

[0004] 2) For heat recovery devices with a rated air volume less than or equal to 3000m3 / h, on-site sampling should be carried out and sent to the laboratory for testing.

[0005] In addition, the "Near-Zero Energy Building Inspection and Evaluation Standard" T / CECS 740-2020 also puts forward the requirement for testing the power consumption per unit air volume of fresh air. At present, the equipment for laboratory testing of the performance of fresh air heat recovery devices is relatively mature, but there is a lack of a system for on-site testing of the performance of fresh air heat recovery devices.

[0006] Therefore, in view of this, the existing structural deficiencies are studied and improved, and a fresh air heat recovery performance detection device with a regulating effect is proposed. Utility Model Content

[0007] The purpose of the utility model is to provide a fresh air heat recovery performance detection device with a regulating effect, so as to solve the problem that it is inconvenient to detect the fresh air heat recovery device on site proposed in the above background technology.

[0008] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a fresh air heat recovery performance detection device with a regulating effect, comprising a fresh air heat recovery unit and a full heat exchange module installed inside the fresh air heat recovery unit, the fresh air heat recovery unit is equipped with a fresh air inlet duct, the fresh air heat recovery unit is equipped with an exhaust air inlet duct, the fresh air heat recovery unit is equipped with an exhaust air outlet duct, the fresh air heat recovery unit is equipped with a fresh air outlet duct, the fresh air inlet duct and the exhaust air inlet duct are both equipped with temperature and humidity sensors and wind speed sensors, the fresh air heat recovery unit is connected to a fresh air heat recovery unit power supply line, the fresh air heat recovery unit power supply line is connected to a clamp power meter, the fresh air outlet duct is equipped with a temperature and humidity sensor, and the fresh air inlet duct, the fresh air outlet duct, the exhaust air inlet duct and the exhaust air outlet duct are all connected to the full heat exchange module.

[0009] Furthermore, one end of the exhaust inlet air duct is connected to an indoor exhaust air conditioning device.

[0010] Furthermore, one end of the fresh air inlet air duct is connected to an outdoor fresh air air conditioning device.

[0011] Furthermore, a data cable is connected to the indoor exhaust air conditioning device, and the other end of the data cable is connected to the outdoor fresh air air conditioning device.

[0012] Furthermore, a data acquisition device is connected to the data line.

[0013] Furthermore, the data line is connected to an electronic computer.

[0014] Furthermore, the data acquisition instrument is connected with a signal line, and the signal line is connected with a pressure sensor.

[0015] Furthermore, the pressure sensor is connected to the temperature and humidity sensor, the wind speed sensor and the clamp power meter respectively through signal lines.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model is convenient for the fresh air heat recovery performance detection device with regulating effect to collect data on site through the setting of data acquisition instrument, and then the power is turned on to detect whether the working status of each sensor is normal, and then the air parameters of the indoor exhaust air conditioning device and the outdoor fresh air air conditioning device are set to reach the design working conditions through the electronic computer, and the fresh air heat recovery device is started. After the fresh air unit works stably, the air thermal parameters are measured, and the fresh air inlet duct is tested in accordance with the requirements of the "Public Building Energy Saving Detection Standard" JGJ / T 177-2009. The electronic computer calculates the fresh air volume of the fresh air heat recovery unit according to the test results, and the performance of the fresh air heat recovery device can be tested on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the fresh air heat recovery unit of the utility model.

[0020] In the figure: 1. Fresh air heat recovery unit; 2. Full heat exchange module; 3. Fresh air inlet duct; 4. Fresh air outlet duct; 5. Exhaust air inlet duct; 6. Exhaust air outlet duct; 7. Temperature and humidity sensor; 8. Wind speed sensor; 9. Fresh air heat recovery unit power supply line; 10. Clamp power meter; 11. Indoor exhaust air conditioning device; 12. Outdoor fresh air air conditioning device; 13. Data acquisition instrument; 14. Signal line; 15. Electronic computer; 16. Data line; 17. Pressure sensor. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1

[0023] like Figure 1 and Figure 2As shown, a fresh air heat recovery performance detection device with a regulating effect comprises a fresh air heat recovery unit 1 and a full heat exchange module 2 installed inside the fresh air heat recovery unit 1, a fresh air inlet duct 3 is installed on the fresh air heat recovery unit 1, an exhaust air inlet duct 5 is installed on the fresh air heat recovery unit 1, an exhaust air outlet duct 6 is installed on the fresh air heat recovery unit 1, a fresh air outlet duct 4 is installed on the fresh air heat recovery unit 1, a temperature and humidity sensor 7 and a wind speed sensor 8 are installed inside the fresh air inlet duct 3 and the exhaust air inlet duct 5, the fresh air heat recovery unit 1 is connected to a fresh air heat recovery unit power supply line 9, a clamp power meter 10 is connected to the fresh air heat recovery unit power supply line 9, a temperature and humidity sensor 7 is installed inside the fresh air outlet duct 4, and the fresh air inlet duct 3 is connected to the fresh air heat recovery unit 1. , fresh air outlet duct 4, exhaust air inlet duct 5 and exhaust air outlet duct 6 are all connected to the full heat exchange module 2, the detection system includes a data acquisition instrument 13, an electronic computer 15, an indoor exhaust air conditioning device 11, and an outdoor fresh air air conditioning device 12. The tested fresh air heat recovery device 1 is connected with four ducts, namely, fresh air inlet duct 3, fresh air outlet duct 4, exhaust air inlet duct 5, and exhaust air outlet duct 6, wherein the other side of the fresh air inlet duct 3 is connected to the outdoor fresh air air conditioning device 12, and the other side of the exhaust air inlet duct 5 is connected to the indoor exhaust air conditioning device 11. A temperature and humidity sensor 7 and a wind speed sensor 8 are respectively installed on the fresh air inlet duct 3 and the exhaust air inlet duct 5, and a temperature and humidity sensor 7 is installed on the fresh air outlet duct 4. The probe of the temperature and humidity sensor 7 is placed at the center of the duct. The wind speed sensor 8 is arranged in accordance with the requirements of the "Public Building Energy Saving Testing Standard" JGJT 177-2009. The pressure sensor 17 is arranged at a position above 1m above the ground and should be far away from the air outlet. The current test ring of the clamp power meter 10 is installed on a wire of the fresh air heat recovery unit power supply line 9. The voltage measurement clips are clamped on each terminal. Each sensor is wirelessly connected to the data acquisition instrument 13 through a signal line 14. The indoor exhaust air conditioning device 11, the outdoor fresh air air conditioning device 12 and the data acquisition instrument 13 are connected to the electronic computer 15 through a data line 16;

[0024] After the arrangement is completed, the power supply is turned on to detect whether the working status of each sensor is normal, and then the air parameters of the indoor exhaust air conditioning device 11 and the outdoor fresh air air conditioning device 12 are set to the design working conditions through the electronic computer 15, and the fresh air heat recovery device 1 is started. After the fresh air unit works stably, the air thermal parameters are measured, and the wind speed of the fresh air inlet duct 3 is tested in accordance with the requirements of the "Public Building Energy Saving Testing Standard" JGJ / T 177-2009. The electronic computer 15 calculates the fresh air volume and exhaust air volume of the fresh air heat recovery unit based on the test results. The calculation formula is as follows:

[0025] L=3600VF

[0026] Where: V——average wind speed in section (m / s);

[0027] F——Cross-sectional area (m 2 );

[0028] L——unit air volume (m 3 / h);

[0029] While measuring the air volume, the electronic computer 15 calculates the power consumption per unit air volume of fresh air according to the unit power measured by the clamp power meter 10. The calculation formula is as follows:

[0030]

[0031] Where: W——fresh air unit wind power consumption of fresh air heat recovery device [W / (m 3 / h)];

[0032] N——Input power of fresh air heat recovery device (W);

[0033] L X，E ——Fresh air volume of fresh air heat recovery device (m 3 / h).

[0034] Then, the heat recovery efficiency is tested. The temperature and humidity of the air on the fresh air inlet duct 3, the fresh air outlet duct 4 and the exhaust air inlet duct 5 are collected by the temperature and humidity sensor 7. The collection is done once a minute and the test lasts at least 30 minutes. At the same time, the atmospheric pressure is tested by the pressure sensor 17.

[0035] The electronic computer 15 calculates the enthalpy value of the air based on the air temperature, humidity and atmospheric pressure of the test results, and then calculates the sensible heat, moisture content and total heat exchange efficiency of the fresh air heat recovery device. The calculation formula is as follows:

[0036]

[0037] Where: η——Exchange efficiency;

[0038] X xj ——Fresh air inlet parameters can be temperature (℃), moisture content [g / kg·dry air], enthalpy (kJ / kg);

[0039] X xc ——The fresh air outlet parameters can be temperature (℃), moisture content [g / kg·dry air], and enthalpy (kJ / kg);

[0040] X pj ——The exhaust air inlet parameters can be temperature (℃), moisture content [g / kg·dry air], and enthalpy (kJ / kg).

[0041] Furthermore, one end of the exhaust air inlet duct 5 is connected to an indoor exhaust air conditioning device 11 .

[0042] Furthermore, one end of the fresh air inlet duct 3 is connected to an outdoor fresh air air conditioning device 12 .

[0043] Furthermore, a data cable 16 is connected to the indoor exhaust air conditioning device 11 , and the other end of the data cable 16 is connected to the outdoor fresh air air conditioning device 12 .

[0044] Furthermore, the data line 16 is connected to a data acquisition device 13 .

[0045] Furthermore, the data line 16 is connected to an electronic computer 15 .

[0046] Furthermore, the data acquisition device 13 is connected to a signal line 14 , and the signal line 14 is connected to a pressure sensor 17 .

[0047] Furthermore, the pressure sensor 17 is connected to the temperature and humidity sensor 7 , the wind speed sensor 8 and the clamp power meter 10 respectively through the signal line 14 .

[0048] Working principle: When using the fresh air heat recovery performance detection device with regulating effect, first, the detection system includes a data acquisition instrument 13, an electronic computer 15, an indoor exhaust air conditioning device 11, and an outdoor fresh air air conditioning device 12. The tested fresh air heat recovery device 1 is connected with four air ducts, namely a fresh air inlet air duct 3, a fresh air outlet air duct 4, an exhaust air inlet air duct 5, and an exhaust air outlet air duct 6. The other side of the fresh air inlet air duct 3 is connected to the outdoor fresh air air conditioning device 12, and the other side of the exhaust air inlet air duct 5 is connected to the indoor exhaust air conditioning device 11. A temperature and humidity sensor 7 and a wind speed sensor 8 are respectively installed on the fresh air inlet air duct 3 and the exhaust air inlet air duct 5. A temperature and humidity sensor 7 is installed on the fresh air outlet air duct 4. The probe of the temperature and humidity sensor 7 is placed in the center of the air duct. The wind speed sensor 8 is in accordance with the "Public Building Energy Saving Testing Standard" JGJ / T 177-2009, the pressure sensor 17 is arranged at a position 1m above the ground and should be far away from the air outlet, the current test ring of the clamp power meter 10 is installed on a wire of the power supply line 9 of the fresh air heat recovery unit, and the voltage measurement clips are clamped on each terminal. Each sensor is wirelessly connected to the data acquisition instrument 13 through the signal line 14, and the indoor exhaust air conditioning device 11, the outdoor fresh air air conditioning device 12 and the data acquisition instrument 13 are connected to the electronic computer 15 through the data line 16. After the arrangement is completed, the power is turned on to detect whether the working state of each sensor is normal, and then the air parameters of the indoor exhaust air conditioning device 11 and the outdoor fresh air air conditioning device 12 are set to the design working condition through the electronic computer 15, and the fresh air heat recovery device 1 is started. After the fresh air unit works stably, the air thermal parameters are measured, and the wind speed of the fresh air inlet duct 3 is tested according to the requirements of the "Public Building Energy Saving Testing Standard" JGJ / T 177-2009. The electronic computer 15 calculates the fresh air volume of the fresh air heat recovery unit according to the test results.

[0049] This is the working principle of the fresh air heat recovery performance detection device with regulating effect.

[0050] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A fresh air heat recovery performance detection device with a regulating effect, comprising a fresh air heat recovery unit (1) and a total heat exchange module (2) installed inside the fresh air heat recovery unit (1), characterized in that: The fresh air heat recovery unit (1) is provided with a fresh air inlet duct (3), the fresh air heat recovery unit (1) is provided with an exhaust air inlet duct (5), the fresh air heat recovery unit (1) is provided with an exhaust air outlet duct (6), the fresh air heat recovery unit (1) is provided with a fresh air outlet duct (4), the fresh air inlet duct (3) and the exhaust air inlet duct (5) are both provided with a temperature and humidity sensor (7) and a wind speed sensor (8), the fresh air heat recovery unit (1) is connected with a fresh air heat recovery unit power supply line (9), the fresh air heat recovery unit power supply line (9) is connected with a clamp power meter (10), the fresh air outlet duct (4) is provided with a temperature and humidity sensor (7), and the fresh air inlet duct (3), the fresh air outlet duct (4), the exhaust air inlet duct (5) and the exhaust air outlet duct (6) are all connected with the full heat exchange module (2).

2. A fresh air heat recovery performance detection device with regulating effect according to claim 1, characterized in that: One end of the exhaust air inlet duct (5) is connected to an indoor exhaust air conditioning device (11).

3. A fresh air heat recovery performance detection device with regulating effect according to claim 2, characterized in that: One end of the fresh air inlet duct (3) is connected to an outdoor fresh air air conditioning device (12).

4. A fresh air heat recovery performance detection device with regulating effect according to claim 3, characterized in that: The indoor exhaust air conditioning device (11) is connected to a data line (16), and the other end of the data line (16) is connected to the outdoor fresh air conditioning device (12).

5. A fresh air heat recovery performance detection device with regulating effect according to claim 4, characterized in that: The data line (16) is connected to a data acquisition device (13).

6. A fresh air heat recovery performance detection device with regulating effect according to claim 5, characterized in that: The data line (16) is connected to an electronic computer (15).

7. A fresh air heat recovery performance detection device with regulating effect according to claim 6, characterized in that: The data acquisition instrument (13) is connected to a signal line (14), and the signal line (14) is connected to a pressure sensor (17).

8. A fresh air heat recovery performance detection device with regulating effect according to claim 7, characterized in that: The pressure sensor (17) is respectively connected to the temperature and humidity sensor (7), the wind speed sensor (8) and the clamp power meter (10) via signal lines (14).

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