KR20000039896A - Personal environment control system and control method thereof - Google Patents

Abstract

PURPOSE: An improved personal environment control system and a control method thereof are provided so a module for a personal air condition system as not to take a space of a worker by installing in a double floor for a floor air condition system. CONSTITUTION: Supply air(4) coming through a double floor(3) of a floor air condition system is cold. A mixing box(7) absorbs comparatively warm indoor air(5) with the cold supply air by the driving of an embedded fan and vents the mixed air-conditioning air(6). The mixing box has a function to regulate the temperature of the air-conditioning air with a device for regulating the amount of the supply air(4). In addition, the mixing box regulates the airflow of the air-conditioning air by controlling the speed of the fan. Accordingly, the air-conditioning air vented from the mixing box is distributed to both side diffusers(9,9') by a connection duct(10) and is diffused into a work station(1) through the diffusers. Herein, the diffuser regulates the direction of wind desired by a user.

Description

Individual environmental control device and its control method

The present invention relates to an individual environmental control apparatus and a control method including an air conditioning function for an individual workspace, such as a desk, and in particular, the temperature of the air conditioning air supplied by connecting the floor air conditioning system in the building to the individual workspace The present invention relates to an individual environmental control device and a method of controlling the same so as to individually control an environment such as air volume.

The floors of large buildings, such as recently built business buildings, are often doubled for the wiring of electrical and telecommunication cables and for the air duct installation of floor air conditioning systems. That is, as the number of cable lines to be wired in a building increases with the development of the information and communication field, complicated wiring is not exposed to the floor. The floor air conditioning system does not install a duct on the ceiling separately, and uses the space in the double floor to supply air conditioning and install an air supply module on the floor. Japanese Laid-Open Patent Publication No. Hei 8-296889 shows an example of a draft device for circulating air conditioning air from such a floor air system to a room.

Most of the air conditioning systems installed in large buildings such as business buildings are centralized. The centralized system is equipped with main equipment in the machine room on the roof or basement to control the temperature and humidity there, generating air conditioning and distributing it to each floor or each room connected through the duct. The purpose of air conditioning is to keep the indoor air clean and to maintain a comfortable temperature and humidity conditions to improve the work efficiency and to make the air condition suitable for production and management. However, some individuals have differences in the degree of environment required such as air temperature, humidity, and air volume. Regardless of these individual differences, the centralized system, which provides air conditioning at a constant temperature, humidity, and air volume, does not create a suitable environment for each individual, and thus provides a cause for the work ability to be deteriorated depending on the individual. In addition, since the centralized type cannot control the temperature, humidity, and air volume of air conditioning at the end, energy use efficiency is lowered, and in particular, full operation is performed regardless of whether or not each room worker is occupied. have.

In the case of the above-described floor air conditioning system, the air conditioning is generated by operating main equipment such as an air conditioner and an air-conditioning unit at the center, and a TAM (task) capable of adjusting the amount and direction of the air conditioning air supplied from the center as an air supply module at the bottom. Although air modules have been installed, the TAM can control the air volume and direction inside the floor, but there is a disadvantage that the supplied air does not directly reach the individual workspace of the occupant and does not have individual temperature control. In addition, it is not easy to create the environment desired by the occupants because the heating and cooling is done using only the floor air.

Therefore, in order to save energy and improve personal comfort and work ability, the system is changing into a zone system that divides each floor or rooms into several zones or a separate air-conditioning system based on individual workspaces such as individual desks rather than a centralized system. It is true. Individual air-conditioning systems can create an optimal environment for each individual, especially by allowing individual control of the individual's workspace environment, which can improve the individual's ability to work and only operate when needed according to the individual's presence. It can be used to prevent energy waste.

A conventionally known for such individual air conditioning systems is the personal environment module (PEM) proposed by US Pat. No. 4,872,397. PEM is equipped with a damper and a fan in the body connected to the floor air conditioning system under the desk. However, since the heat is generated from the motor driving the fan to increase the temperature of the supply air, the air conditioning performance is reduced. In addition, the noise problem is caused by the fan to control the flow rate of air to be provided with a separate noise generator (white noise generator). On the other hand, the PEM body is attached to the bottom of the desk, and requires a separate radiant heater to be installed together to take up a lot of space. Therefore, inconvenience to the worker and there is room for damage.

The main object of the present invention is an improved personal environment control system (IPECS) and a control method thereof, in which a module for an individual air conditioning system can be installed in a double floor for a floor air conditioning system so as not to occupy a worker's space. To provide.

The object of the present invention is also to solve the heat problem in the module for the individual air conditioning system to enhance the air conditioning performance and solve the noise problem, eliminating the need for a separate noise removing device, easy to install individual environmental control device and its control To provide a way.

1 is a front view showing an individual workstation installed with an individual environmental control device according to the present invention.

Figure 2 is a perspective view showing the appearance of the mixing box of the individual environment control apparatus according to the present invention.

Figure 3 is a perspective view showing the internal structure of the mixing box of the individual environment control apparatus according to the present invention.

Figure 4 is a perspective view of the main part showing the detachable structure of the filter installed in the mixing box of the individual environment control apparatus according to the present invention.

Figure 5 is a side view of the main part showing a rotational support structure of the panel-type radiant heating heater installed in the mixing box of the individual environment control apparatus according to the present invention.

Figure 6 is a plan view showing a controller of the individual environmental control apparatus according to the present invention.

7 is a control circuit diagram of an individual environmental control apparatus according to the present invention.

8 is an operation flowchart of an individual environmental control apparatus according to the present invention.

Explanation of symbols on the main parts of the drawings

1: Workstation 2: Lighting

3: floor 7: mixing box

8: radiant heating heater 9,9 ': diffuser

10: Connection duct 12: System controller

16,18: suction duct 19: damper

22: ironizer 23: sirocco fan

24: motor 25,26: filter

27: spring 28: hook

39: occupancy sensor

The individual environmental control device according to the present invention for achieving the above object is installed in a double floor for the floor air conditioning system is arranged in a separate work space such as a mixing box (mixing box), a desk to generate air conditioning air diffused air conditioning At least one diffuser (diffuser), the connecting box and the diffuser connecting the duct, and includes a controller.

In addition, the individual environmental control method according to the present invention to achieve the above object is to suck the air from the inside of the double bottom of the floor air conditioning system, and also to suck and mix the indoor air from the individual working space and to discharge it to the individual working space It features.

The mixing box couples the body to a panel that can be matched to the floor so that it can be installed in a double floor for the floor air conditioning system, and the damper and fan are mounted in the body. The motor driving the fan is installed outside the body so that the supply air is not heated by the motor. The noise problem can be naturally solved by installing the mixing box under the floor. In addition, pre-filters and electro-static filters are installed in the mixing box body to maintain clean air supply. Preferably, the controller calculates the time for the best operation of each filter to inform the filter change time, and the user can easily change the filter by pressing a button installed on the panel. In addition, panel heating radiator heaters are integrally installed on the panel of the mixing box so that they do not occupy much space.

On the other hand, the controller not only operates and stops the mixing box and the radiant heating heater, but also sets the temperature and air flow, displays the system operation status and the filter replacement time, and also controls the mixing box and the radiant heating heater according to the availability. And a room sensor is installed to control the lighting fixtures that illuminate the workspace.

Hereinafter, exemplary embodiments will be described with reference to the accompanying drawings. In the accompanying drawings, Figure 1 is a front view showing an individual workstation in which the individual environmental control apparatus according to the present invention is installed. In the drawings, reference numeral 1 denotes a workstation, 2 a lamp, 3 a double floor for a floor air conditioning system, and 4 a supply air of a floor air conditioning system. The individual environmental control apparatus of the present invention is a mixing box for generating an air conditioner 6 which sucks and mixes the supply air 4 and the room air 5 of the floor air system as the main body of the IPECS installed inside the floor 2. (7), the panel radiant heating heater (8) integrally installed in the mixing box (7), the diffuser (9) for blowing the air conditioning air (6) generated in the mixing box (7) to the workstation (1). 9 '), a connecting duct 10 having a Y-type distributor 11 for connecting the mixing box 7 and the diffusers 9 and 9' and distributing air conditioning to both sides, and a controller 12 do.

The mixing box 7 has a body coupled to a flat and rigid panel 13 and a housing 14 as shown in FIGS. 2 and 3. The indoor air suction grille 15 is installed at one side of the panel 13, and the indoor air suction duct 16 is connected to the inside thereof. In addition, a supply air suction grille 17 is installed at one side of the housing 14, and a supply air suction duct 18 is connected thereto. The supply air suction duct 18 is integrally coupled with a damper 19 for adjusting the supply air suction amount and an actuator 20 for operating the supply air suction duct 18. On the other side of the panel, a supply nozzle 21 for air-conditioning air for connecting the connection duct 10 is formed, and high pressure charge is concentrated on the fine needle for ionization of the supply air in the inner housing 14. It is equipped with an ionizer 22 for discharging the air and a sirocco fan 23 for discharging the air at a desired amount of air. The motor 24 driving the sirocco fan 23 is provided outside the housing 14. In the housing 14, the indoor air sucked through the suction ducts 16 and 18 and the supply air of the floor air conditioning system are mixed and then discharged to the supply nozzle 21 by the sirocco fan 23, the mixed air. Between the suction ducts 16 and 18 and the siro fan 23, the prefilter 25 having a physical dust collecting function and the electrostatic filter 26 collecting dust on the principle of electrostatic adsorption are spaced between the suction ducts 16 and 18 in order to filter impurities contained in the gap. It is installed. The prefilter 25 and the electrostatic filter 26 are resiliently supported by the springs 27 and fixed to one side of the springs 27 in the housing 14 as shown in FIG. To be mounted. In other words, by removing the hook 28 is lifted by the spring 27 can be easily replaced. Preferably, the pre-filter 25 has an antimicrobial hygroscopic function while removing large particles having a particle diameter of 0.5 mm or more, and the electrostatic filter 26 has a two-stage structure in which an electrostatic precipitator and an activated carbon filter are combined to have fine dust of 10 μm or more. It is configured to have the electrostatic filtering function of 10mmAq or less by removing and deodorizing.

On the other hand, the panel-type radiant heating heater 8 for separate auxiliary heating is installed at the center of the upper surface of the panel 13. The panel radiant heating heater 8 can be accommodated in a recess 29 formed in the panel 13 of the mixing box and shown in the support bar 31 which is collapsible with the hinge 30 as shown in FIG. 5. By adjusting the angle in approximately three stages can be used to stand inclined. That is, when the radiant heating heater 8 is not used, it can be accommodated in the recess 29 so as not to occupy space. The radiant heating heater 8 is composed of a ceramic radiant heater and a planar heating element.

6 shows an overview of the system controller 12. The system controller 12 includes display lamps 32, 33, 34, temperature controller 35, air volume controller 36, and radiant heating for indicating an error in system operation and the timing of replacing the pre-filter and electrostatic filter described above. The operation switch 37 of the heater, the main switch 38, and the occupancy sensor 39 for detecting the presence or absence of the operator is equipped with a part of the control circuit shown in FIG. Here, the occupancy sensor 39 is an infrared sensor, and is configured to output a signal indicating that there is no operator after a delay time (10 minutes) when it is detected that the operator is away.

The control circuit is equipped with an 8-bit or 16-bit CPU and external ROM and RAM as shown in FIG. 7, and can also communicate with other external systems by using a neuron chip and a transceiver. Configure it. The CPU receives data having information indicating the temperature and air volume set by the user from the system controller 12 and stores the data in the RAM. Then, the CPU retrieves the data stored in the RAM and performs a comparison operation according to the data stored in the ROM. Commands to control the above-described radiant heating heater, damper actuator, sirocco fan motor and the like according to the temperature and the air volume set by the. In addition, the CPU counts the operating time of the system and when the exchange time of the pre-filter and the electrostatic filter described above is reached, the corresponding lamp in the system controller 12 is turned on to inform the user of the filter replacement time. The exchange time of the filters is built into the ROM. Also, the ROM includes a program for sequentially executing the control routine as shown in FIG. 8 and an algorithm for operation in each control routine.

Hereinafter, the system operation will be described with reference to the above-described drawings and the operation flowchart of FIG. 8 in parallel.

1, the supply air 4 coming through the double bottom 3 of the floor air conditioning system is cold air. The mixing box 7 sucks the relatively warm indoor air 5 together with the cold supply air 4 by driving the built-in fan and discharges the mixed air conditioner 6. The mixing box has a function of adjusting the temperature of the air conditioning air 6 as a means for adjusting the amount of the supply air 4 sucked as described later in the air conditioning air 6. It also has a function of controlling the air volume of the air conditioning air 6 discharged by controlling the speed of the fan. The air conditioning air 6 discharged from the mixing box 7 is distributed to both diffusers 9 and 9 'through the connection duct 10 and diffused into the workstation 1 through the diffusers 9 and 9'. do. The diffusers 9 and 9 'may adjust the wind direction desired by the user.

When the main switch 38 of the system controller 12 of FIG. 6 is turned on, the system operates. First, the occupancy sensor 39 operates to measure whether the worker is in a room in real time (S1). Detect the signal to inform. Then, the control circuit CPU of FIG. 7 determines whether or not the operator is occupied based on the signal of the occupancy sensor 39 (S2). When it is determined that there is an operator, the lamp 2 shown in FIG. 1 is turned on (S3). Then, the set temperature value set by the current user and stored in the RAM is read (S4), and the room temperature of the workstation 1 is measured (S5) to determine whether the set temperature and the room temperature match ( S6). If the set temperature and room temperature coincide, the system is operated in the present state, and if it does not coincide with each other, the operation as described below is performed.

That is, by measuring the supply temperature and the supply air volume of the air conditioning air discharged from the current mixing box (7) (S7, S8) and comparing the measured current supply temperature and supply air volume with the set temperature and the air volume set by the user ( S9), the damper actuator opening and closing time and the fan operation amount (1 stage, 2 stage, 3 stage) are calculated according to the comparison result (S10). After the calculation is completed, the damper 19 actuator 20 shown in FIG. 3 is operated according to the calculated result (S11) to adjust the intake amount of the cold supply air from the bottom air conditioning system, and also the speed according to the calculated air volume. The sirocco fan 23 and the motor 24 are operated (S12). Then, the current supply wind volume is measured (S13), and it is determined whether the measured current supply wind volume is consistent with the set wind volume by the user (S14). If the current supply air flow rate and the set air flow rate do not match, calculating the above-described damper actuator opening / closing time and fan operation amount (1 stage, 2 stage, 3 stage) based on the current supply wind volume and the user set wind volume ( By repeating from S10), it is to compensate the damper control state and the siro fan speed.

On the other hand, if it is determined that the worker is away in the above-described determination of whether to take the room (S2) during the operation of the system, the lamp (2) once turned on (OFF) (S15), the Sirocco fan motor 24 Lower to the minimum (stage 1) speed (S16). Then, it is determined whether the radiant heating heater 8 by the user is currently operating (ON) (S17), and if the radiant heating heater 8 is in operation, the operation of the radiant heating heater 8 is stopped (OFF) (S18). Then, by checking the elapsed time from when the worker started to leave the room, it is determined whether the set room OFF time has elapsed (S19), and if the worker does not appear to pass the room OFF time, the sirocco fan motor 24 Suspend operation.

In this way, if the operator is not in operation, turn off the lamp (2) and radiant heating heater (8) and lower the sirocco fan motor (24) to the minimum speed. This can prevent energy consumption. If the worker returns to the delay time 10 set in the above-described occupancy sensor 39 after the user is away, the system is maintained in the previous operation state to eliminate the inconvenience of the operator. On the other hand, when the worker returns within 1 hour by setting the OFF time of the room to return to the original air-conditioning state to create an optimal environment within a short time, the system stops operating when it does not return for more than 1 hour. will be.

The above-mentioned room temperature and the temperature of the supply air can be measured by mounting a temperature sensor at a suitable position in the workstation 1 and the mixing box 7. On the other hand, in calculating the air volume of the supply air can also be calculated by measuring the wind speed (flow rate) or wind pressure (hydraulic pressure) using a sensor. In other words, if the flow rate is Q, the wind speed is V, and the cross-sectional area of the duct (diffuser) is A, the flow rate is defined as follows since the flow rate is multiplied by the area.

Q = (V) (A)

Further, assuming that the difference between the indoor air and the set temperature is ΔT = (room temperature)-(set temperature), the air volume Q for compensating for this temperature difference can be calculated as follows.

Q = (H) (v) / (Cp) (ΔT), v = V / G [m 3 / kg]

Where H is the latent heat that moves when a pure substance changes state at a constant temperature, v is the specific volume occupied by the unit weight of the substance, and Cp is the pressure maintained in the case of gas. Specific heat at constant pressure, which represents the rate of change of enthalpy over temperature, and G is the weight.

That is, since the normal air contains pure air and moisture, when the air temperature in the room is changed, the above-described calculations for latent heat can calculate the amount of air required to compensate for the temperature change.

As described above, the present invention comprises a mixing box which can be installed in the double floor of the floor air conditioning system in configuring an individual environment control device that can be individually controlled by connecting the floor air conditioning system and the individual work space. In addition, the panel-mounted radiant heating heater, which can be folded into the mixing box, is integrally installed so as not to occupy the workstation space. Therefore, the inconvenience of the operator can be reduced, and in particular, the problem that the system device is damaged by the operator and the noise problem is solved at the same time. In addition, the present invention solves the problem that the air is heated by the motor to install a motor for driving the fan installed in the mixing box outside the box, by mixing the cold air from the flooring system and the warm air in the room Therefore, the air conditioning performance is further enhanced by controlling the intake volume of the cold air to control the desired temperature and air volume. In addition, the present invention by automatically adjusting the system operating conditions in accordance with the operator's re-examination, while minimizing energy waste by preventing unnecessary operation while maintaining the work environment in an optimal state.

In this way, the present invention is to maintain the optimum environment of the individual workspace to improve the personal comfort and work efficiency and reduce the energy consumption, and also does not cause inconvenience to the operator by minimizing the installation space.

Claims (18)

It is installed inside the double floor of the floor air conditioning system and diffuses the mixing box which sucks and mixes the indoor air from the individual floor and the indoor air from the individual work space and discharges it to the work space, and the air that is discharged to the individual work space. At least one diffuser disposed to make, a duct connecting the mixing box and the diffuser, and a system controller for remotely controlling the temperature and air volume of the air discharged from the mixing box Device. The individual environmental control apparatus according to claim 1, further comprising a radiant heating heater for heating integrally installed in the mixing box. The fan according to claim 1 or 2, wherein the mixing box has a body which is a combination of a flat panel and a housing, and is mounted to suck and discharge air in the body, and a motor for driving the fan; A suction inlet and its suction duct for suctioning the supply air from the floor air conditioning system and the indoor air of an individual workspace, a damper and an actuator thereof coupled to the suction duct for sucking the air in the double bottom and controlling the amount of suction; Individual environmental control device characterized in that it comprises a filtering means for filtering the suctioned and mixed air. 4. The individual environment control apparatus according to claim 3, wherein a motor for driving the fan is provided outside the body. 4. The individual environment control apparatus according to claim 3, further comprising means for counting the use time of the filtering means and informing the replacement time. The individual environmental control apparatus according to claim 3 or 5, wherein the filtering means includes a prefilter physically collected and an electrostatic filter that adsorbs dust on the principle of electrostatic adsorption. 7. A spring as claimed in claim 6 further comprising a spring having a resilience to push the filters to be detachable from the body and a releasable hook to hold the filters against the spring. Individual environmental control device. The individual environment control apparatus according to claim 1 or 2, further comprising an ionizer for ionizing air discharged from the mixing box. The radiant heater according to claim 2, wherein the radiant heating heater is a panel type, and the mixing box has a recess that can accommodate the thickness of the panel radiant heating heater, and the radiant heating heater is recessed in the mixing box. Individual environmental control device further comprises a hinge rotatably connected to be folded or raised to use, and a support bar rotatable to support the generated radiant heating heater. The method according to claim 1 or 2, further comprising an occupancy sensor for detecting whether the operator is occupied in the individual workspace, the operation is controlled according to the occupancy of the operator detected by the occupancy sensor. Individual environmental control device. 11. The individual environment control apparatus according to claim 10, further comprising an illumination lamp for illuminating the work space, wherein the lights of the illumination lamp are controlled together by the occupancy sensor. An individual environment control method comprising inhaling air from inside a double bottom of a floor air conditioning system and inhaling and mixing indoor air from an individual work space and then discharging the air into the individual work space. The method according to claim 12, wherein the temperature of the air discharged to the individual work space is controlled by adjusting the suction amount of the air sucked from inside the double bottom of the floor air conditioning system. According to claim 12 or 13, Individual environmental control method further comprises the step of controlling the air flow of the discharge air in accordance with whether or not the presence of the operator to detect whether the worker in the individual workspace. . 15. The method of claim 14, further comprising the step of heating the individual heating space by operating the radiant heating heater, the individual environmental control method characterized in that the operation of the radiant heating heater is controlled according to the room. 15. The method of claim 14, further comprising the step of illuminating the individual workspace by lighting the lamp, the individual environment control method, characterized in that the lighting of the lamp is controlled in accordance with the room. 13. The method of claim 12, further comprising: filtering air discharged after suctioning air from the inside of the double bottom of the floor air conditioning system and sucking and mixing indoor air from a separate work space using a dust collecting filter member; Individual time control method, characterized in that it further comprises the step of counting the time to replace the filter member. 18. The method of claim 12 or 17, further comprising generating negative ions to ionize the discharged air.