KR100984118B1 - Outdoor air cooling ventilation unit - Google Patents

Abstract

The present invention is a case 100 is empty inside; An outside air suction port 110 formed at one end of the case 100; An air supply unit 120 formed at the other end of the case 100 and supplying the outside air introduced into the outside air suction port 110 into the room; An air intake 130 formed at the other end of the case 100 in parallel with the air supply 120 and sucking indoor air; An exhaust port 140 formed at one end of the case 100 in parallel with the outside air intake port 110 and discharging the indoor air introduced into the air intake port 130 to the outside; Indoor air and outdoor air supplied and discharged are installed to cross a passage connecting the outside air intake port 110 and the air supply port 120 and a passage connecting the inside air intake port 130 and the exhaust port 140 to each other. A total heat exchanger 200 performing heat exchange while crossing; An air supply fan 300 installed inside the case 100 to generate power for supplying the outside air introduced into the outside air suction port 110 to the room through the air supply unit 120; An exhaust fan 400 installed inside the case 100 and generating power for discharging indoor air introduced into the air intake 130 to the outside through the exhaust port 140; A first damper 150 installed at an inlet side of the outside air suction port 110; A second damper 160 installed at an outlet side of the exhaust port 140; An outside air cooling passage 500 which is branched at the front end of the first damper 150 and connected to the inside of the air supply port 120 without passing through the total heat exchange part 200; A third damper 510 installed on the outside air cooling passage 500; A control unit 600 for controlling the operation of the first damper 150, the second damper 160, the third damper 510, the exhaust fan 400 and the air supply fan 300; And a sensing unit 700 which senses indoor and outdoor environment information and transmits the interior and exterior environmental information to the control unit 600.

Description

External air cooling combined heat exchange waste heat recovery ventilation unit {Outdoor Air Cooling Ventilation Unit}

The present invention relates to a ventilation unit and a control technology of the concept that the outdoor air cooling passage is provided separately to supply the outdoor air to the room without direct heat exchange unit when direct cooling using outdoor air is required.

In general, the ventilation unit (VENTILATION UNIT) is for forcibly drawing air from the inside or the outside and blowing it to the outside or the inside, mainly for schools, hospitals, cooking rooms, office buildings, subway stations, underground shopping malls, terminal waiting rooms, For ventilation of multi-use facilities used by many people such as airport facilities, libraries, museums, saunas, PC rooms, and offices, the outside air is filtered in an air conditioner or clean room, and then introduced into the room. Manual operation, time schedule operation, and automatic operation by CO ₂ detection are common.

Therefore, the structure of the conventional ventilation unit is formed with an air inlet and an air outlet at one end of the casing, and an air outlet and an air inlet are formed at the other end, and an air supply fan and an exhaust fan are respectively installed inside the casing. It is common to install a heat exchanger and a filter in the inner center.

In particular, the ventilation unit having such a structure allows the outdoor air to be introduced into the casing by the air supply fan, filtered through the filter and discharged into the room, and at the same time, the indoor air is introduced into the casing by the exhaust fan, filtered through the filter and discharged to the outside. In this process, the heat exchanger absorbs the heat of the indoor air discharged during the winter to increase the temperature of the outdoor air, thereby reducing the heating loss, and absorbs the cold air of the indoor air discharged during the summer. By lowering the temperature of outdoor air, the cooling loss is reduced.

However, even when there is a need for natural cooling with ventilation by introducing fresh air directly when the outside air temperature (enthalpy) is lower than the room temperature (enthalpy) due to solar heat storage during spring and autumn (or early summer and early autumn) or during summer night. The conventional ventilation unit has a problem that does not satisfy this desire because the outdoor air heated by the room temperature is introduced because the ventilation unit must pass through the heat exchange unit.

Meanwhile, the existing ventilation unit control technology includes manual operation, time schedule operation, CO ₂ detection, or automatic operation by a sensor that can determine air pollution. However, this method cannot realize air cooling operation. In addition, there is a need for improvement due to the tendency that the operation by pollution detection is operated differently from the actual indoor air quality. Therefore, it is necessary to devise a more precise indoor pollution control and air cooling control combined operation method to maximize the energy saving while realizing a pleasant indoor environment that is the purpose of the waste heat recovery ventilation unit. have.

The present invention created to solve the above problems is to install a separate air cooling passage and a damper in the existing ventilation unit case by introducing the outside air directly if necessary, a new concept of outdoor air cooling that can perform natural cooling with ventilation Its purpose is to provide a combined ventilation unit and its control technology.

Technical composition of the present invention created to achieve the above object is as follows.

The present invention is a case 100 is empty inside; An outside air suction port 110 formed at one end of the case 100; An air supply unit 120 formed at the other end of the case 100 and supplying the outside air introduced into the outside air suction port 110 into the room; An air intake 130 formed at the other end of the case 100 in parallel with the air supply 120 and sucking indoor air; An exhaust port 140 formed at one end of the case 100 in parallel with the outside air intake port 110 and discharging the indoor air introduced into the air intake port 130 to the outside; Indoor air and outdoor air supplied and discharged are installed to cross a passage connecting the outside air intake port 110 and the air supply port 120 and a passage connecting the inside air intake port 130 and the exhaust port 140 to each other. A total heat exchanger 200 performing heat exchange while crossing; An air supply fan 300 installed inside the case 100 to generate power for supplying the outside air introduced into the outside air suction port 110 to the room through the air supply 120; An exhaust fan 400 installed inside the case 100 and generating power for discharging indoor air introduced into the air intake 130 to the outside through the exhaust port 140; A first damper 150 installed at an inlet side of the outside air suction port 110; A second damper 160 installed at an outlet side of the exhaust port 140; An outside air cooling passage 500 which is branched at the front end of the first damper 150 and connected to the inside of the air supply port 120 without passing through the total heat exchange part 200; A third damper 510 installed on the outside air cooling passage 500; Control unit for controlling the operation of the first damper 150, the second damper 160, the third damper 510, the exhaust fan 400 and the air supply fan 300 by analyzing the indoor and outdoor air environment ( 600); And a sensing unit 700 that senses indoor and outdoor environment information and transmits the interior and exterior environmental information to the control unit 600.

Technical effects of the configuration of the present invention are as follows.

First, when the external air cooling operation conditions are not formed, the third damper 510 is cut off, the first damper 150 and the second damper 160 are opened to perform the same function as the general ventilation unit, and the outdoor air cooling is performed. When the operating conditions are formed, it is possible to cool the outside air by opening the third damper 510 and the second damper 160 and blocking the first damper 150 to directly introduce outside air.

Second, the inside, outside, or inside of the outdoor temperature and humidity sensor 710 and the air intake 130 to sense the temperature and humidity of the outside air installed in the front end of the first damper 150 and transmits it to the controller 600. It is installed on one side of the side wall is provided with an indoor temperature and humidity sensor 720 to sense the temperature and humidity of the indoor air and transmit it to the control unit 600, it is possible to automatically control in conjunction with the sensor.

third. The outside air cooling passage 500 is also provided with a pre-filter and a high-performance HEPA filter can effectively block foreign matters when introducing outside air and supply purified air to the room.

Fourth, the outdoor air cooling operation of the ventilation unit using the data sensed by the indoor temperature and humidity sensor 720 and the outdoor temperature and humidity sensor 710 as shown in the automatic control flow chart of Figure 3 and the CO ₂ sensor 740 for detecting the indoor air environment and By combining the pollution control operation of the ventilation unit using the TVOC sensor 730 or the like, it is possible to maximize the energy saving by enabling a minimum operation while realizing a comfortable indoor environment.

Fifth, CO ₂ sensor 740, TVOC sensor 730, indoor dust sensor 770, outdoor dust sensor that can measure not only indoor temperature and humidity sensor 720 and outdoor temperature and humidity sensor 710 but also various indoor and outdoor environments 775, HCHO sensor 750, wind direction / wind speed sensor 760, solar radiation sensor 790, rainwater detection sensor 780, etc. can implement a system that can provide useful living information, electric shade Additional energy savings can be maximized through interlocking operation with devices, power windows, and lighting equipment.

Hereinafter, with reference to the accompanying drawings, a specific embodiment of the present invention will be described in more detail.

1 is a cross-sectional view of a specific embodiment of the present invention, FIG. 2 is a block diagram showing a control unit which is a major component of the present invention, and FIG. 3 is a flowchart showing an automatic control process of the present invention.

The case 100 is empty as shown in FIG. 1 and serves as a body and an air passage in which the main components of the present invention are mounted.

The outside air suction opening 110 is formed at one end of the case 100 (one side facing the outside air) to serve as an inlet through which outside air is introduced.

The air supply port 120 is formed at the other end (one side facing the room) of the case 100 to serve as an outlet for supplying the outside air introduced into the outside air suction port 110 to the room.

That is, a passage is formed inside the case 100 to connect the outside air intake port 110 and the air supply port 120, and the heat exchange part 200 is provided on the path passing through the passage.

The air intake 130 is formed at the other end of the case 100 (one side facing the room) in parallel with the air supply 120, and serves as an inlet for sucking the indoor air.

The exhaust port 140 is formed at one end of the case 100 (one side toward the outside air) in parallel with the outside air intake port 110, and serves as an outlet for discharging the indoor air introduced into the air intake port 130 to the outside. .

That is, a passage connecting the air intake 130 and the exhaust port 140 is formed in the case 100, and the total heat exchange part 200 is provided on the path passing through the passage.

The total heat exchange part 200 is supplied to the indoor air discharged and installed to cross the passage connecting the outside air intake port 110 and the air supply port 120 and the passage connecting the internal air intake port 130 and the exhaust port 140. As the outside air crosses each other, heat exchange is performed.

The structure of the total heat exchange part 200 is the same as that of a general heat exchange part used in a general conventional ventilation unit, and thus a detailed description thereof will be omitted.

The air supply fan 300 is installed inside the case 100 and generates power to supply the outside air introduced into the outside air suction opening 110 to the room through the air supply unit 120.

That is, if the air supply fan 300 is installed at an appropriate position on the passage connecting the outside air inlet 110 and the air supply 120, it is not necessarily installed inside the air supply 120 as shown in FIG. 1. It may be installed inside the outside air inlet 110.

The exhaust fan 400 is installed inside the case 100 and generates power to discharge the indoor air introduced into the air intake 130 to the outside through the exhaust port 140.

In the case of the exhaust fan 400, if it is installed at an appropriate position on the passage connecting the air intake port 130 and the exhaust port 140, it is not necessarily installed inside the exhaust port 140 as shown in FIG. It may be installed inside the suction port 130.

The first damper 150 is installed at the inlet side of the outside air inlet 110 and is automatically opened and closed by the controller 600.

The second damper 160 is installed at the outlet side of the exhaust port 140 and is automatically opened and closed by the controller 600.

The outside air cooling passage 500 is branched at the front end of the first damper 150 and connected to the inside of the air supply port 120 without passing through the total heat exchange part 200.

That is, the outside air cooling passage 500 serves as a passage connecting the front end of the first damper 150 and the air supply pipe 120, and when passing through the outside air cooling passage 500, the total heat exchange unit 200. Outside air that has not passed through can be supplied directly to the room.

The third damper 510 is installed on the outside air cooling passage 500 and is automatically opened and closed by the controller 600.

The controller 600 controls the operation of the first damper 150, the second damper 160, the third damper 510, the exhaust fan 400, and the air supply fan 300, and controls indoor pollution and indoor / outdoor temperature and humidity. It detects and analyzes and commands the automatic control of pollution control and air cooling.

The detection unit 700 detects indoor and outdoor environment information and delivers the information to the control unit 600. The detection unit 700 of the present invention includes an indoor temperature / humidity sensor 720 and a CO ₂ sensor 740 installed at an indoor side. , TVOC sensor 730, HCHO sensor 750, indoor dust sensor 770, the outdoor temperature and humidity sensor 710, wind direction / wind speed sensor 760, rainwater sensor 780, solar radiation sensor installed on the outdoor side 790, an outdoor dust sensor 775 is included.

The outdoor temperature and humidity sensor 710 is installed at the front end of the first damper 150 detects the temperature and humidity of the incoming air and transmits it to the control unit 600 through the transmitter, if the position to measure the temperature and humidity of the outside air It is not necessarily limited to the front end portion of the first damper 150, the installation position can be freely selected.

The indoor temperature and humidity sensor 720 is installed at one side of the inside, outside, or indoor side wall of the air intake 130 to sense the temperature and humidity of the indoor air and transmit the temperature and humidity to the control unit 600 through the transmitter. If the position can be measured, the installation position is not particularly limited or limited.

As such, when the outdoor temperature and humidity sensor 710 and the indoor temperature and humidity sensor 720 are provided, the control unit 600 respectively performs outdoor enthalpy and indoor enthalpy according to signals received from the outdoor temperature and humidity sensor 710 and the indoor temperature and humidity sensor 720. This operation can be automatically calculated by the operation shown in FIG. 2 and the program mounted in the controller.

The CO ₂ sensor 740, TVOC sensor 730, HCHO sensor 750, the indoor dust sensor 770 may be installed in one or more locations that can detect the indoor air environment, each of these sensors It can be installed separately or combined into one unit.

The wind direction / wind speed sensor 760, the outdoor dust sensor 775, the solar radiation sensor 790, and the rainwater detection sensor 780 installed at the outdoor side are installed at one or more suitable positions at the outdoor side to transmit outdoor environment information. do.

As shown in FIG. 2, the control unit 600 not only controls the operation of the ventilation unit of the present invention using indoor and outdoor environment information, but also controls a cooling device and a boiler, and interprets the information to provide useful living information. It can also be done.

As shown in FIG. 2, the control unit 600 may be subdivided into a display and setting unit, an operation and control unit (MCU), an external signal input unit and an output driving unit (Gateway & I / O Module), and the like. As described above, the total heat exchange operation and the air cooling operation may be selected by manual operation or a time schedule operation. When the total heat exchange operation is selected, the ventilation is performed through the entire heat exchange unit 200.

When the air cooling operation is selected, the control unit 600 determines the condition for meeting the air cooling period, the condition where the outside air temperature is lower than the air cooling setting room temperature, the condition where the room temperature is higher than the room cooling setting room temperature, and the calculated outdoor enthalpy is higher than the room enthalpy. If any of the conditions are not met, the third damper 510 is cut off, and the first damper 150 and the second damper 160 are opened to perform the same function as the general electrothermal exchange ventilation unit. The heat exchange between the outside air and the discharged indoor air is to be made in the total heat exchange part 200, and if all the above conditions are met, the third damper 510 and the second damper 160 are opened, and the first damper By shutting off the 150, the outdoor air is operated in the external air cooling mode in which the outdoor air is directly supplied to the room without passing through the heat exchange unit 200.

A condition that meets the outside air cooling period is a time period in which outside air cooling is pre-set in consideration of the climate of the region. In Korea, it generally means spring, autumn (or early summer and early autumn) or summer night.

When the automatic operation is selected, the control unit 600 operates by combining the pollution control operation according to the indoor air environment and the air cooling operation according to the indoor and outdoor air environment, and at this time, the total heat exchange operation of the pollution control operation is performed by the third damper 510. ) And the first damper 150 and the second damper 160 are opened and operated, but the stages of the supply / exhaust fan are automatically adjusted to 1,2,3 stages according to the pollution degree.

That is, the controller 600 compares the signals received from the CO ₂ sensor 740, the TVOC sensor 730, the HCHO sensor 750, and the indoor dust sensor 770 with a preset value to determine the pollution level in the room. According to the determined pollution degree, the operation of the air supply fan 300 and the exhaust fan 400 is automatically adjusted.

In the air cooling operation of the pollution control operation and the air cooling operation in a non-pollution state, the third damper 510 and the second damper 160 are opened, and the first damper 150 is blocked so that the outdoor air is transferred to the heat exchange unit. It is supplied directly to the room without passing through 200) and the supply / exhaust fan is operated by the fixed stage.

The first filter unit 210 is installed on one surface of the total heat exchange unit 200 facing the outside air inlet 110, and the second filter unit 220 is the other surface of the total heat exchange unit 200 facing the internal air suction port 130. The third filter unit 520 is installed on the outside air cooling passage 500. In the case of the second filter unit 220, the third filter unit 520 may be composed of only the pre-filter 11, but the first filter unit 210 and The third filter unit 520 is composed of a pre-filter 11 and a high-performance HEPA filter 12, it is preferable to completely filter the foreign matter contained in the incoming air to be supplied to the room.

Specific embodiments of the present invention as described above in more detail with reference to the accompanying drawings, but the scope of protection of the present invention is not necessarily limited to these embodiments and various design changes within the scope not changing the technical spirit of the present invention. In addition, the addition or deletion of well-known technology, and simple numerical limitations also make it clear that they belong to the protection scope of the present invention.

1 is a cross-sectional view of a specific embodiment of the present invention.

2 is a block diagram showing a control unit which is a main component of the present invention.

3 is a flowchart showing an automatic control process of the present invention.

<Description of the symbols for the main parts of the drawings>

100: case

110: outside air intake

120: supply air

130: bet suction

140: exhaust vent

150: first damper

160: the second damper

200: electric heat exchanger

210: first filter unit

220: second filter unit

300: supply fan

400: exhaust fan

500: air cooling passage

510: third damper

520: third filter unit

600: control unit

700: detection part

710: outdoor temperature and humidity sensor

720: room temperature and humidity sensor

730: TVOC (Total Volatile Organic Compound) Sensor

740: CO ₂ (carbon dioxide) sensor

750: HCHO (formaldehyde) sensor

760: Wind / wind sensor

770: indoor dust sensor

775: outdoor dust sensor

780: rainwater sensor

790: solar radiation sensor

11: pre-filter

12: high performance HEPA filter

Claims (5)

A case 100 having an empty interior; An outside air suction port 110 formed at one end of the case 100; An air supply unit 120 formed at the other end of the case 100 and supplying the outside air introduced into the outside air suction port 110 into the room; An air intake 130 formed at the other end of the case 100 in parallel with the air supply 120 and sucking indoor air; An exhaust port 140 formed at one end of the case 100 in parallel with the outside air intake port 110 and discharging the indoor air introduced into the air intake port 130 to the outside; Indoor air and outdoor air supplied and discharged are installed to cross a passage connecting the outside air intake port 110 and the air supply port 120 and a passage connecting the inside air intake port 130 and the exhaust port 140 to each other. A total heat exchanger 200 performing heat exchange while crossing; An air supply fan 300 installed inside the case 100 to generate power for supplying the outside air introduced into the outside air suction port 110 to the room through the air supply unit 120; An exhaust fan 400 installed inside the case 100 and generating power for discharging indoor air introduced into the air intake 130 to the outside through the exhaust port 140; A first damper 150 installed at an inlet side of the outside air suction port 110; A second damper 160 installed at an outlet side of the exhaust port 140; An outside air cooling passage 500 which is branched at the front end of the first damper 150 and connected to the inside of the air supply port 120 without passing through the total heat exchange part 200; A third damper 510 installed on the outside air cooling passage 500; A control unit 600 for controlling the operation of the first damper 150, the second damper 160, the third damper 510, the exhaust fan 400 and the air supply fan 300; And, Sensing unit 700 for detecting the indoor and outdoor environmental information and transmitting to the control unit 600; And, In the detection unit 700, An outdoor temperature and humidity sensor 710 which senses the temperature and humidity of the introduced outside air and transmits it to the controller 600; An indoor temperature and humidity sensor 720 which senses a temperature and humidity of indoor air and transmits it to the controller 600; A CO ₂ sensor 740 that detects the concentration of carbon dioxide contained in the indoor air; And, A TVOC sensor 730 for detecting the total nonvolatile organic compound concentration contained in the indoor air; Is included, The control unit 600, When the signal received from the CO ₂ sensor 740 and the TVOC sensor 730 is compared with a preset value, if the received signal is higher than the preset value, it is determined that contamination has occurred in the room and the ventilation is in a stopped state. Operate the unit in the external air cooling operation mode or the total heat exchange operation mode, and perform a control to automatically adjust the operating speed of the air supply fan 300 and the exhaust fan 400 according to the determined pollution degree, The outside air according to the signals received from the outdoor temperature and humidity sensor 710 and the indoor temperature and humidity sensor 720 in order to determine the operation of the outdoor air cooling operation mode or the total heat exchange operation mode in the operation method for controlling the indoor pollution from the control unit 600. Calculate enthalpy and indoor enthalpy, The third only when all of the conditions that correspond to the set outside air cooling period, the outside air temperature is lower than the outside air cooling set outside temperature, the room temperature is higher than the outside air cooling set room temperature, and the calculated outside air enthalpy is lower than the room enthalpy After the damper 510 and the second damper 160 are opened and the first damper 150 is blocked, the decontamination and cooling to control the air supply fan 300 and the exhaust fan 400 to be operated automatically. Ventilate air cooling operation mode for load reduction, If any one of the above conditions is not met, the air supply fan 300 and the exhaust fan are blocked after the third damper 510 is blocked and the first damper 150 and the second damper 160 are opened. Perform the decontamination and waste heat recovery electrothermal exchange operation mode ventilation to control the 400 to operate automatically, When the signal received from the CO ₂ sensor 740 and the TVOC sensor 730 is lower than the preset value compared to the preset value, if the contamination does not occur in the room or the contamination is removed, To block all of the first damper 150, the second damper 160, and the third damper 510, and to stop all of the air supply fan 300 and the exhaust fan 400, When the indoor air cooling operation mode meets all of the operating conditions even when no pollution occurs in the room, the third damper 510 and the second damper 160 are opened again, and the first damper 150 is blocked. After both the air supply fan 300 and the exhaust fan 400, the external air cooling combined heat exchange waste heat recovery ventilation unit for cooling the air load to reduce the air load operation mode for controlling to operate automatically. delete delete delete delete

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