KR101824875B1 - Air conditioning system for saving heating load - Google Patents

Abstract

The present invention relates to a heat recovery air conditioning system realizing energy saving when indoor temperature is maintained at a predetermined level. According to one embodiment of the present invention, an air conditioning system installed in a building including a heat radiating body to radiate heat in an outdoor space comprises: a discharge device to discharge air of an indoor space of the building to the outside; an air supply line supplying external air to the indoor space and having a connection unit formed in a front end part; a first damper to adjust the amount of external air supplied to the connection unit; a heater means disposed in the air supply line to heat the air passing through the inside; a recovery line communicating with the connection unit to bypass a part of the air of the indoor space to the air supply line; a second damper to adjust the amount of air flowing in the recovery line; an inlet line communicating with the connection unit to allow the external air heated by the heat radiating body to communicate with the air supply line; a third damper to adjust the amount of air supplied to the air supply line from the heat radiating body; and a control unit to control operation of the heater means and the dampers.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a heat recovery air conditioning system for realizing energy saving in maintaining a room temperature at a certain level.

An air conditioning system is used to satisfy indoor air conditions that require a certain level of ambient conditions that vary with seasonal changes and weather. The air conditioning system cools the hot outside air in summer and supplies cold air to the room. In winter, the outside air is heated by a heater to supply the heated air to the room. Further, the air conditioning system may further include a means for adjusting the humidity or a filtering means for filtering the foreign matter.

In the operating conditions of the winter air conditioning system, the difference between the required temperature of the room and the temperature of the outside air is very large. The heating energy required to sufficiently warm the outside air at a very low temperature is very large, and it costs a great deal to operate the air conditioning system.

Korean Patent Publication No. 10-2011-0093219 (Aug. 18, 2011) Korean Patent Publication No. 10-2014-0104073 (2014.08.28) Korean Patent No. 10-1562744 (October 16, 2015)

The present invention proposes an air conditioning system that can reduce the amount of power consumed in heating the outside air in operating the air conditioning system during the winter when the outside air temperature is low, thereby realizing energy saving.

Other objects and advantages of the present invention will become apparent to those skilled in the art from the following detailed description.

According to an aspect of the present invention, there is provided an air conditioning system provided in a building including a radiator for radiating heat to the outside, comprising: an exhaust device for exhausting air in an indoor space of the building to outside air; A first damper for introducing air into the indoor space and having a connecting portion at a front end thereof, a first damper for adjusting an amount of air in the outside air supplied to the connecting portion, a heater means for heating air passing through the inside of the air supply line, A second damper for adjusting the amount of air moving through the return line, and a second damper for communicating the outside air heated by the heat discharging member with the air supply line. An inlet line communicating with the connection portion, a third damper controlling the amount of air flowing from the heat discharger to the air supply line, It proposes a heat recovery air-conditioning system comprising a control unit for controlling the operation of the heater means and the damper.

Further, the heat discharging body is a compressor having a cooling fan, and the air introduced into the inflow line is air provided from the cooling fan, and the inflow line is opened from the cooling fan in a state in which the third damper is closed, And a fourth damper for discharging the supplied air to the outside.

In addition, when the external temperature is equal to or lower than a predetermined reference temperature, the controller may close the fourth damper while opening the third damper to provide the air passing through the heat discharging body to the inflow line.

Also, the first damper and the second damper are proportional control valves, and the controller can adjust the opening degree of the first damper or the second damper based on the temperature difference between the indoor space and the outside air.

According to the embodiment of the present invention, since the temperature of the air flowing into the room can be increased by using a heat source that is discharged from a separate heat discharging body installed outside the building, the energy required for heating can be reduced.

The effects of the present invention will be clearly understood and understood by those skilled in the art, either through the specific details described below, or during the course of practicing the present invention.

1 is a schematic diagram of a heat recovery air conditioning system according to an embodiment of the present invention;
2 is a schematic view of a heat sink adopted in the embodiment shown in Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the configuration, functions, and functions of a heat recovery air conditioning system according to the present invention will be described with reference to the accompanying drawings. It should be noted, however, that the same reference numerals are used for the same or similar components throughout the drawings.

In the following description, terms such as 'first', 'second', and the like are used to distinguish constituent elements whose technical meaning is within the same range for convenience. That is, any one configuration may be arbitrarily referred to as a 'first configuration' or a 'second configuration'.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, therefore, are not to be construed as limiting the technical spirit of the invention. It is to be understood that the invention is not to be limited by any of the details of the description to those skilled in the art from the standpoint of a person skilled in the art that any or all of the drawings shown in the drawings are not necessarily the shape,

In the present invention, the indoor space is a space inside the building, which is a space disconnected from the outside, and is an object to which air of a user's intended temperature is supplied. For example, the indoor space can be a work space or a warehouse of an industrial facility.

A heat discharging body (40) for radiating heat is provided outside the building. The heat discharging body 40 covers various outdoor equipments, and may be, for example, a compressor constituting a refrigeration cycle. The radiator may be anything necessary for the operation of the building or equipment for any treatment required to operate any facility provided in the building. The radiator does not discriminate if it dissipates heat.

The air conditioning system 100 according to the embodiment of the present invention mainly uses heat energy emitted from the heat discharging body 40.

Specifically, an air conditioning system 100 according to an embodiment of the present invention includes an exhaust system 10, an air supply line L1, a first damper D1, a heater 20, a recovery line L2, a second damper D2, an inflow line L3, a third damper D3, and a control unit 30.

The exhaust device 10 discharges the air in the indoor space of the building to the outside. The internal air discharged by the exhaust device 10 is not returned to the air conditioning system and is eventually discarded into the atmosphere. In some cases, a purifying means for treating foreign matter in the air that escapes to the exhaust device may be further roughened. A blower for sucking and discharging indoor air may be provided in the exhaust device.

The air supply line L1 is a main passage through which the air provided in the indoor space R passes. The air supply line (L1) can be constituted by a duct through which air passes. The air supply line L1 may be equipped with various means for processing the temperature and humidity of the air supplied to the room. Further, the air supply line L1 may be provided with a blower B for facilitating circulation of air. The blower B serves to flow air in the air supply line. The heat generated by the operation of the blower B can raise the temperature of air supplied to the room, and the degree of operation of the heater means described later can be varied in consideration of the degree of the influence.

A connecting portion L11 is provided at the tip end of the air supply line L1. The connecting portion L11 communicates with another line. In the illustrated embodiment, the connecting line L11 is connected to the collecting line L2 and the inflow line L3, and the line for drawing the outside air communicates with the connecting portion L11.

The air in the recovery line L2 or the inflow line L3 flows into the air supply line L1 through the connection L11 and is supplied to the indoor space through the blower through various means for changing the air condition such as temperature and humidity. Can be introduced.

The connecting portion L11 is connected to an air passage for introducing outside air, and a first damper D1 is provided. The first damper D1 is a valve that is opened and closed by an electric motor, and controls the air flowing in the air passage. The amount of air in the outside air flowing into the connecting portion L11 is controlled by the operation of the first damper D1.

On the other hand, the air passage of the air supply line (L1) is provided with a heater means (20) for heating air passing through the air supply line (L1). The heater means 20 is one of various means for changing the air condition.

The heater means 20 includes a heat exchange plate, thereby raising the temperature of the air passing therethrough. The heater means 20 may include an electric heater for adjusting the degree of heat generation of the heat exchange plate depending on the magnitude of the supplied electric current. The electric heater that consumes electric power is advantageous in precisely controlling the air temperature passing through the air supply line L1 by facilitating the heat generation control.

The recovery line L2 connects the indoor space R and the connection L11 to bypass part of the air in the indoor space R to the air supply line L1. One end of the recovery line L2 is communicated with the connection portion L11 and the other end is connected with the indoor space R. [

The recovery line L2 is provided with a second damper D2 for regulating the amount of air moving through the recovery line L2. The amount of air in the indoor space flowing through the connection portion L11 and the air supply line L1 is changed by the operation of the second damper D2.

The inflow line L3 provides an air passage for communicating the outside air whose temperature is raised by the heat discharging body 40 to the air supply line L1.

The heat discharging body 40 is provided with a means for allowing the received ambient air to pass through the heat discharging body and to be heated. The heated air moves along the inflow line L3 and enters the connecting portion L11. This air is mixed with the air introduced into the outside air or the recovery line from the connection portion L11 and flows into the indoor space R through the air supply line L1.

The means for moving the outside air to the heat discharging body 40 and raising the temperature may include a blower for moving the outside air and a housing for forming a closed space by appropriately wrapping a heat generating portion. In some cases, a blower or the like for moving the outside air may already be provided in the heat discharging body.

For example, the compressor, which is the heat discharging body 40 shown in Fig. 2, is provided with a cooling fan 41 for heat dissipation. As the cooling fan 41 rotates, the outside air collects around the heat generating compressor, and the heated air is forcedly moved by the cooling fan 41 by wrapping the compressor. By adopting the structure in which the end of the inflow line L3 surrounds the side of the discharge port of the cooling fan 41, the outside air whose temperature has risen through the compressor is introduced.

The inflow line L3 is provided with a third damper D3 for regulating the amount of air flowing into the inflow line via the heat discharger 40. [ In a state in which the third damper D3 is closed, the inflow line L3 is closed so that the air passing through the heat discharging body is not introduced.

Particularly, in the case where the heat discharging body 40 is a compressor having a cooling fan 41, the portion connecting the inflow line L3 to the cooling fan 41 is a portion where the air heated by the cooling fan 41 is discharged to the outside And to adopt a confidential structure so as not to leak to the user. It is necessary to discharge the air discharged to the cooling fan 41 to the outside in a state where the third damper D3 is closed. To this end, a fourth damper D4 is provided at a position close to the third damper D3 .

The third damper D3 and the fourth damper D4 are operated in opposite directions so that the fourth damper D4 is opened when the third damper D3 is closed and the third damper D3 is opened The fourth damper D4 is closed. The opposite operation between the third damper D3 and the fourth damper D4 can be solved by solving the valves of both damper through the mechanical connection structure or by setting the operating relationship of both dampers in the control section as a conditional statement.

The control unit 30 controls the operation of the heater means 20 and the dampers D1 to D4. The control unit 30 receives temperature information from the temperature sensor installed at each position in an electrical signal. The temperature sensors s1 to s5 are provided in the indoor space, the outside of the first damper in which the outside air is sucked, the inside of the inflow line, the outside of the bypass line, and the inside of the air supply line in which the air before passing through the heater means stays.

The control unit 30 also uses a flow rate sensor (not shown) to measure the amount of air passing through each line. The flow sensor is installed in an exhaust line, an air supply line, a recovery line, a passage through which outside air flows into the connection portion, and an inflow line. The flow sensor can be replaced by a sensor that measures the wind speed and can be configured to calculate the air flow based on the measured wind speed.

The control unit 30 includes a temperature sensor s1 to s5 and a reception module for receiving an electric signal from the flow sensor, a memory for storing control conditions, a central processing unit for calculation, a power amount control module And the like. Further, the control unit 30 may further include an additional configuration such as a humidity sensor to handle additional information such as humidity. The configuration of such a control unit may be in accordance with known techniques, and a detailed description thereof will be omitted.

The control unit 30 closes the fourth damper D4 while opening the third damper D3 while the temperature of the outside is equal to or lower than the predetermined reference temperature and passes through the heat sink 40 to the inflow line L3, Air can be supplied.

For example, the reference temperature may be 0 ° C. The temperature of the air introduced into the air supply line L1 can be increased by introducing the air heated through the compressor mainly in the winter period into the air supply line L1 as much as possible. Accordingly, the difference between the required temperature of the indoor space R and the air difference in the connection part L11 of the air supply line L1 can be reduced, thereby minimizing the amount of heat to be further heated by the heater unit 20. [

In addition, the second damper D2 is opened as much as possible in order to minimize the supply of outside air through the first damper D1. Accordingly, the air introduced through the air supply line L1 maximally utilizes the air of the recovery line L2 and the inflow line L3, which has a temperature higher than the ambient temperature.

The control unit 30 calculates the operating power of the heater unit 20 by comparing the temperature measured by the temperature sensor s1 located in front of the heater unit 20 with the required temperature set by the user in the indoor space R Temperature) and the flow rate information of the air flowing through the air supply line L1 can be used.

The first damper D1 and the second damper D2 are constituted by proportional control valves and the control unit 30 controls the first damper D1 and the second damper D2 based on the temperature difference between the indoor space R and the outside air. 2 The degree of opening of the damper (D2) can be adjusted.

Even in winter, the required temperature of the indoor space R can be changed from a high temperature to a low temperature by the user's operation. When the required temperature is changed as described above, the controller 30 adjusts the inflow amount of the cold outside air and the inflow amount of the recovered warm temperature through proportional control of the first damper D1 and the second damper D2, The air conditioning system 100 can be operated in such a direction as to minimize additional power consumption such as the air conditioner (air conditioner).

For example, if the user has lowered the required temperature of the indoor space R, if the temperature of the outside air is lower than the current temperature of the indoor space R, the inflow amount of the outside air is appropriately increased and the amount of air recovered from the indoor space R It is possible to cool the air in the air supply line L1 in accordance with the required temperature.

If the air temperature in the air supply line L1 is still higher than the required temperature even when the first damper D1 is opened to the maximum and the second damper D2 is closed, the controller 30 operates the cooling means You can tell. By thus delaying the intervention of the cooling means as much as possible, electric energy required for operating the cooling means can be reduced.

Furthermore, when the required temperature of the indoor space R and the temperature difference between the outdoor air and the outdoor air are small, the required temperature condition can be satisfied by merely controlling the degree of opening of the first damper D1 and the second damper D2 . For example, when the required temperature is 18 캜, the temperature of the outside air is 15 캜, and the air temperature of the inflow line is 20 캜, the mixture of the air of the inflow line L3 and the outside air is adjusted to the required temperature The degree of opening of the damper D1 can be controlled. In this case, the degree of opening of the second damper D2 is controlled so as to fill the amount of air required in the air supply line L1.

100: Air conditioning system
10: Exhaust system L1: Supply line L11: Connection part D1: First damper
20: heater means L2: recovery line D2: second damper
L3: Inflow line D3: Third damper D4: Fourth damper
30: control unit R: indoor space 40: radiator 41: cooling fan

Claims (4)

An air conditioning system provided in a building provided with a compressor including a cooling fan (41) as a heat radiator for radiating heat to the outside,
An exhaust unit 10 for exhausting air in the indoor space R of the building to outside air,
An air supply line L1 for introducing outside air into the indoor space R,
Heater means 20 located in the air supply line L1 for heating the air passing through the inside thereof,
A connection part L11 provided at the front end of the air supply line L1,
A first damper D1 for adjusting the amount of air supplied to the connection L11,
A collection line L2 communicating with the connection unit L11 to bypass a part of the air in the indoor space R to the air supply line L1,
A second damper D2 for controlling the amount of air moving through the recovery line L2,
An inlet line L3 communicating with the connection portion L11 to communicate the outdoor air heated by the compressor with the air supply line L1,
A third damper D3 for adjusting the amount of air flowing from the compressor to the connecting portion L11,
A fourth damper D4 which is opened when the third damper D3 is closed and discharges the air provided from the cooling fan 41 to the outside,
And a control unit (30) for controlling the operation of the heater means (20) and the dampers (D1 to D4)
The control unit 30
In order to calculate the operating power of the heater means 20, a difference between the temperature measured by the temperature sensor located in front of the heater means 20 and the required temperature set by the user in the indoor space R, The flow rate information of the air flowing through the flow path L1 is used,
The fourth damper D4 is closed while the third damper D3 is opened and the air passing through the compressor through the inflow line L3 is supplied to the connecting portion L11 when the temperature of the outside is lower than a preset reference temperature So that the difference between the required temperature and the air in the connection L11 is reduced to minimize the amount of heat to be further heated by the heater means 20. [
Heat recovery air conditioning system. delete delete The method of claim 1,
The first damper (D1) and the second damper (D2) are proportional control valves,
The control unit 30
The degree of opening of the first damper (D1) or the second damper (D2) is adjusted based on the temperature difference between the indoor space and the outside air
Heat recovery air conditioning system.

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