KR101036193B1 - Air Conditioner with Exhaust Heat Recovery - Google Patents

Abstract

The present invention relates to an air conditioner having an exhaust heat recovery function, and is used in an application by the suction pressure of an exhaust blower fan for supplying air, a blower fan for supplying air, and an exhaust blower fan installed on both sides of the housing and the compartment. Ventilation unit for guiding suctioned air flow inside the enclosure, exhaust unit for guiding a part of the ventilation flow into the atmosphere, and suction air guiding the outside air inside the enclosure by the suction pressure of the blower fan for air supply together with a part of the ventilation flow A filter part through which a part of the base, suctioned air and a part of the ventilation flows, an air supply part for supplying a part of the filtered outside air and a ventilation part to the place of use, and a ventilation part installed between the exhaust part and the outside part to heat exchange the air flow and the air An air conditioner having an exhaust heat recovery function including a rotary heat exchanger; Between the exhaust unit and the external air portion is installed the rotary heat exchanger is provided with a bypass flow path for bypassing the exhaust and the introduced air flow is discharged immediately and introduced without heat exchange without passing through the rotary heat exchanger, The passage passage provides an air conditioner having an exhaust heat recovery function, characterized in that an exhaust part bypass damper for adjusting the flow rate of the exhaust flow and the outside air flow and an external air bypass damper are respectively provided.
According to the present invention, by having a variable flow path structure it is possible to change the ventilation type according to the external air condition, it is easy to control the static pressure, heat exchange according to the amount of ventilation is improved heat exchange efficiency is improved, the energy saving effect can also be obtained. .

Description

Air conditioner with exhaust heat recovery function {AIR CONDITIONER HAVING A FUNCTION OF EXHAUST HEAT RECOVERY}

The present invention relates to an air conditioner having an exhaust heat recovery function, and in particular, it is possible to adjust the processing capacity by combining a plurality of rotor type heat exchangers, and it is possible to easily change the ventilation or outside air introduction conditions through a bypass damper and install it at the time of renovation. The present invention relates to an air conditioner having an improved exhaust heat recovery function to contribute to energy savings by improving heat exchange efficiency with ease of use.

In general, an air conditioner is an apparatus used to adjust a certain space to a temperature, humidity, and airflow distribution suitable for human activity, and to remove dust from the air at the same time.

Normally, the indoor temperature that a person feels comfortable is based on the senses, and it may vary depending on the person.However, in summer, the outdoor air temperature and temperature difference are about 5 to 6 ℃, the room temperature is 25 to 29 ℃, and the humidity is 60 to 70%. In winter, the room temperature is 18 ~ 21 ℃, and the humidity is about 55 ~ 70%.

At this time, the principle of controlling the temperature in the air conditioner is to use the heat of evaporation that takes heat from the surroundings when the liquid evaporates, as in a refrigerator or refrigerator.

These types of air conditioners range from the small size used in homes to the large size used in buildings. The large sized special air conditioners are equipped with the main unit in the center and the ducts are used to control the cooling and heating of each room. The centralized diet is the dominant.

For example, FIG. 1 shows an example of a conventional air conditioner, wherein a ventilation unit RA 'equipped with ventilation and an outdoor air duct and an external air unit OA' are connected, and a prefilter 52 'and a medium are inside. It is provided on one side of the case 100 'and the case 100' provided with a plurality of filter units 50 ', a cooling coil 80' and a heating coil 90 ', such as a filter 54'. It includes the air supply unit (SA ') is provided with a blower and an air supply duct therein, the air recovered through the use is introduced into the case (100') through the ventilation duct, and the outside air through the outside air duct Is introduced.

The introduced air and the outside air are mixed and the foreign matter is filtered while passing through the filter part 50 ', and cooled or heated to an appropriate temperature while passing through the cooling and heating coils 80' and 90 '. It is transferred to the base SA ', and the conveyed air is sent to the air supply duct by the blower and supplied to the place of use.

By the way, when the conventional air conditioner does not recover the heat of the ventilation streams discharged to the ventilation unit RA 'but simply discharges it, a problem of enormous energy waste occurs.

Accordingly, techniques have been disclosed to recover the waste heat of the ventilation flow by installing a rotary or stationary heat exchanger on the ventilation side.

As a technique related to this, there may be mentioned Registration No. 0447885, Registration No. 0562843, and the like.

However, Korean Patent No. 0447885 focuses on the technical aspect of controlling the displacement according to the indoor pollution degree using a plurality of dampers, but at a minimum cost, and Patent No. 0562843 focuses on the improvement of the filter. In fact, it is not a technological progress that maximizes waste heat recovery efficiency.

In addition, in the case of the season, the indoor temperature is high and the outdoor temperature is properly maintained at about 17-18 ° C., but in some cases, it is better to directly introduce and supply the air conditioner. It was designed so that it was a waste of energy.

In addition, since the heat exchanger for recovering exhaust heat is sized according to the capacity, it has a considerable difficulty in renovation. For example, since the size of the existing air conditioning room to be renovated is limited, the heat transfer is increased as the capacity is increased even if the capacity of the heat exchanger is increased. As the air conditioner becomes larger due to the exchanger, it is impossible to retrofit it because of the space limitation of the existing air conditioning room, so it is impossible to renovate it.In addition, it is difficult to design an air conditioner equipped with an electric heat exchanger of a capacity suitable for an old air conditioner. There are considerable difficulties.

The present invention was created in view of the above-mentioned problems in the prior art, and it is created to solve this problem. It is possible to easily change the ventilation conditions such as bypassing the introduced outdoor air or go through the heat exchanger, which is advantageous for energy saving and static pressure management, and furthermore, by adjusting the number of times passing through the total heat exchanger according to the change of the ventilation amount. Its main purpose is to provide an air conditioner having an exhaust heat recovery function which allows an efficient heat exchange function to be performed.

The present invention is a means for achieving the above object, used by the suction pressure of the exhaust blower fan and the air supply fan, the exhaust blower fan installed and installed on both sides while the compartment, the inside of the housing a plurality of compartments Ventilation part for guiding the ventilation flow into the enclosure, exhaust part for guiding part of the ventilation flow to the atmosphere, and external part for guiding the outside air into the enclosure by the suction pressure of the blower fan for supplying a part of the ventilation flow A filter section through which a part of the intake air and ventilation flows through, an air supply supplying the filtered outside air and a part of the ventilation flow to the place of use, and a circuit installed between the exhaust section and the outside air section to heat-exchange the ventilation and outdoor air streams. An air conditioner having an exhaust heat recovery function including a typical heat exchanger; Between the exhaust unit and the external air portion is installed the rotary heat exchanger is provided with a bypass flow path for bypassing the exhaust and the introduced air flow is discharged immediately and introduced without heat exchange without passing through the rotary heat exchanger, The passage passage provides an air conditioner having an exhaust heat recovery function, characterized in that an exhaust part bypass damper for adjusting the flow rate of the exhaust flow and the outside air flow and an external air bypass damper are respectively provided.

At this time, the rotary heat exchanger is provided in plurality in accordance with the capacity, it is also characterized in that installed in parallel on the enclosure.

In addition, when a plurality of rotary heat exchangers are installed, a plurality of rotary heat exchangers are connected to form a flow path, but the exhaust flow constitutes a flow path through which only the exhaust flows, and the outside air flows through only the external air flow. Comprising a plurality of flow paths, the upper and lower parts of the rotary heat exchanger is further provided with a plurality of control dampers for selectively opening and closing the flow path, the intermediate damper on the flow path to adjust the flow path through the rotary heat exchanger in accordance with the flow rate There is also a feature in controlling the heat exchange efficiency through controlling the heat exchange efficiency.

According to the present invention, by having a variable flow path structure it is possible to change the ventilation type according to the external air condition, it is easy to control the static pressure, heat exchange according to the amount of ventilation is improved heat exchange efficiency is improved, the energy saving effect can also be obtained. .

1 is a side cross-sectional view showing an example of a conventional air conditioner.
Figure 2 is an exemplary view showing the appearance of the air conditioner in order to explain the air conditioner having an exhaust heat recovery function according to the present invention.
3 is an exemplary view showing a model of an air conditioner in a state in which a total heat exchanger for exhaust heat recovery is mounted according to the present invention.
4 is a plan view and a side sectional view of an air conditioner having an exhaust heat recovery function according to a first embodiment of the present invention.
5 is a plan view and a side sectional view of an air conditioner having an exhaust heat recovery function according to a second embodiment of the present invention.
6 and 7 illustrate an air conditioner having an exhaust heat recovery function according to a third embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

As shown in FIG. 2, the air conditioner according to the present invention includes a housing 100, and both sides of the housing 100 are provided with an exhaust blower fan 200 and an air supply blower fan 300. The exhaust blower fan 200 is driven by the exhaust motor 210, and the air supply blower fan 300 is driven by the supply motor 310.

At this time, the housing 100, as shown in Figure 4, a plurality of box-type casing, that is, the fan box (102,104), the air mixing box 106, if there is a heat exchanger 'heat exchange unit', the coil box 108 They are assembled together, which constitutes an air conditioner.

The upper part of the enclosure 100, as shown in Figure 2, the ventilating unit (RA) for sucking the ventilation flow, the exhaust unit (EA) for discharging the exhaust flow, the outside air portion (OA) for introducing the outside air and the introduced outside air The air supply unit SA for supplying the indoors is provided, each of which is provided with a ventilation duct 410, an exhaust duct 420, an outside air duct 430, and an air supply duct 440.

Here, more precisely, the ventilation unit RA is installed in the exhaust fan box 102, and the exhaust unit EA and the outside air unit OA are installed in the air mixing box 106, and the air supply unit ( SA) is installed in the air supply fan box 104, but since all of them are named as the structure 100 in the assembled state, the following briefly explain that they are installed in the housing 100 for convenience of explanation and understanding. Shall be.

In addition, a filter unit 400 is provided inside the housing 100 between the outside air unit OA and the air supply unit SA, and configured to supply the air for supplying air in a filtered state, according to a control condition before the final air supply. In the case of cooling, the cooling air is supplied through a cooling coil (not shown), and in the case of heating, the heating air is supplied through a heating coil (not shown).

Thus, ventilation and air supply are made in the manner described above. For example, maintaining 30% of the ventilation amount means that 30% of the amount sucked from the ventilation unit RA is discharged through the exhaust unit EA, and 70% is contained in the enclosure. 100 is supplied to the air supply unit SA through a damper (not shown) installed in the middle of the interior, and the final air supply is made through the air supply unit SA by introducing external air through the external air unit OA by 30% discharged. The amount is maintained at 100% by combining 70% circulating during ventilation and 30% introduced air.

This description is merely an example for the sake of understanding, and the controller automatically controls the ratio and adjusts it according to the environmental conditions.

Here, the exhaust heat recovery function is implemented in the form as shown in FIG.

That is, as shown in FIG. 3, the rotary heat exchanger 500 is installed above the enclosure 100 so that the exhaust flow through the exhaust unit EA and the introduction flow through the external air unit OA can be exchanged with each other. .

At this time, the rotary heat exchanger 500, a so-called 'Rotor heat exchanger', is a heat exchanger, which is a unit well known in the art as disclosed in the above-mentioned Patent No. 0562843.

As such, the structure in which the preheat exchanger, that is, the rotary heat exchanger as shown in FIG. 3 is mounted on the outer shape of the air conditioner shown in FIG. 2 is used as the basic structure of the air conditioner having the exhaust heat recovery function according to the present invention.

[First Embodiment]

The first embodiment of the present invention has a configuration in which a bypass damper is further installed in the above-described basic structure.

That is, as shown in FIG. 4, the bypass damper is divided into an exhaust part bypass damper 610 provided on the exhaust part EA side, and an external air bypass damper 620 provided on the external air part OA side.

In addition, each bypass damper is installed in parallel so as not to interfere with the rotary heat exchanger 500 which is a total heat exchanger and has a separate flow path.

Therefore, when it is not necessary to recover the exhaust heat through the rotary heat exchanger 500, for example, in the case of the seasons, especially in the case of the seasons in which the indoor temperature is high and the outdoor temperature is kept fresh at about 17-18 ° C. There are times when it is more advantageous to introduce.

In such a case, when the operation of the rotary heat exchanger 500 is stopped and the opening degree of the exhaust part bypass damper 610 and the external part bypass damper 620 is adjusted, the ventilating air flows to the exhaust part EA. It can be directly exhausted without heat exchange, and the introduced outside air, that is, the introduced flow can also be introduced directly in that state without heat exchange, it is possible to supply the fresh air immediately outside.

Accordingly, it is not necessary to operate the rotary heat exchanger 500, thereby obtaining an energy saving effect, and solving the problem of applying a static pressure generated by the operation of the rotary heat exchanger 500 during ventilation.

That is, the ventilation flow that has passed through the use is intaken into the enclosure 100 through the ventilation unit RA, and the intake ventilation flow is again blown by the exhaust blower fan 200 driven by the exhaust motor 210. By the part is exhausted through the exhaust portion (EA) with the harmful air, the other part is to move toward the inflow of outside air.

At the same time, the outside air is introduced through the outside air unit OA due to the suction pressure of the air supply fan 300 driven by the air supply motor 310, and the introduced outside air is supplied to the air supply fan together with a part of the ventilation flow. After being sucked to 300, it is supplied to the place of use through the air supply unit SA.

While such a process is repeatedly performed, the ventilation flow bearing heat is exhausted while leaving heat on one side of the rotor of the rotary heat exchanger 500, and when the exhaust heat recovery is required, the rotary heat exchanger 500 is provided. If rotated at regular intervals, heat exchange is performed in the form of transferring the heat to the inlet when the half conducting half of the heat conducts to the outside air introduction. Since it is heated in the preheated state, the amount of heat is reduced so that it contributes to energy saving.

On the other hand, when cooling is required, the temperature of the air vented and discharged is lower than that of the outside air, and thus the energy consumption is reduced when cooling through the cooling coil because the introduced outside air is introduced and supplied in a somewhat cooled state through heat exchange. Will be reduced.

In addition, in the transitional condition as described above, the driving of the rotary heat exchanger 500 is stopped while the bypass flow path is opened while being switched to the bypass mode according to the key operation or setting conditions on the control panel (not shown). Since the air flow and the intake air (outer air) are not heat exchanged with each other, the intake air is directly supplied without being preheated, thereby achieving even higher energy savings.

Here, even if the rotary heat exchanger 500 is simply stopped without using a bypass damper, it can be considered that the exhaust and inlet can be bypassed without heat exchange. Particles having large particles as well as fine particles and foreign matters are included, so that these foreign matters are continuously passed through the rotary heat exchanger 500, which is a narrow flow path, in one direction only for a long time. It is virtually impossible as it accumulates and sticks on the flow path, causing the problem of closing the heat exchange flow path.

That is, the rotary heat exchanger 500 is rotated while the exhaust flows through the heat exchange flow passage partitioned in roughly half, and the other half is designed to pass through the inflow, so the position of the air is changed periodically. If foreign matters such as suspended particles move along the exhaust stream and are caught in the heat exchange flow path, the foreign matter falls in the inflow direction by the introduction flow when rotated by 90 ° and the foreign matter contained in the introduction flow is introduced. If the heat exchange flow path is caught along the flow path, when it is rotated 90 ° in that state, the exhaust air flows into the exhaust flow direction, thereby preventing foreign matter from accumulating or sticking to the heat exchange flow path.

Therefore, the rotary heat exchanger 500 must have a structure that is rotated.

However, as in the first embodiment of the present invention, a bypass flow path is configured on one side of the rotary heat exchanger 500, and when the air flow is narrowed, the flow path of the air is narrow so that it is difficult to flow. In this case, even if the rotation of the rotary heat exchanger 500 is stopped, foreign matter does not accumulate or adhere to the heat exchange flow path.

[Second Embodiment]

As shown in FIG. 5, the second embodiment of the present invention has a plurality of rotary heat exchangers 500 arranged in parallel on a horizontal line in the structure of the first embodiment.

Of course, even in this case, the bypass damper constituting the bypass flow path, that is, the exhaust part bypass damper 610 and the external part bypass damper 620 are provided as it is.

Therefore, when the capacity of the total heat exchanger needs to be increased or the capacity of the total heat exchanger needs to be changed during the refurbishment work, it is possible to easily cope by adjusting the number of the rotary heat exchangers 500 arranged in parallel as described above.

[Third Embodiment]

As shown in FIGS. 6 and 7, when the rotary heat exchanger 500 is installed in plural in parallel, the third embodiment of the present invention may be configured to adjust the heat exchange efficiency according to the ventilation amount by configuring the flow path P. FIG. It may be.

For example, assuming that three rotary heat exchangers 500 are installed in parallel in plural as shown in FIG. 7, a multiple flow path P that can pass through the rotary heat exchanger 500 is configured, and each flow path P Each of the control dampers (D) is installed, and the intermediate damper (D1) between the flow path and the flow path by the rotary heat exchanger 500 according to the ventilation flow or the outside air volume passing through the rotary heat exchanger 500 in accordance with the ventilation amount It is possible to adjust the rate at which the introduced flow introduced through the heat exchange with each other.

That is, by adjusting the control damper (D) and the intermediate damper (D1), the exhaust stream to be exhausted moves along the flow path (P) sequentially after passing through the three rotary heat exchanger (500) and finally discharged, By introducing the same flow through the same path it is possible to maximize the heat exchange efficiency with less energy.

Here, for the sake of convenience, only three rotary heat exchangers 500 are illustrated for the purpose of illustration, and the rotary heat exchangers 500 may be provided in one, two, three, four, etc. according to installation environments. It can be installed in various numbers.

In addition, since the control damper (D) is installed on one side or both sides with the rotary heat exchanger 500 therebetween as shown in FIG. 6, the control damper D passes through only one rotary heat exchanger 500 according to the air volume, and then exhausts or It can be introduced, and then vented or introduced after two rotary heat exchangers 500, and its opening can be adjusted so that it can then be vented or introduced after three rotary heat exchangers 500. have.

As described above, the air conditioner having the exhaust heat recovery function according to the present invention may bypass ventilation or external air (introduction) as necessary, and may be configured in a multi-type in which a plurality of electrothermal heat exchangers are installed in parallel in an installation environment. The heat exchange efficiency can be adjusted according to the ventilation amount or the air introduction amount by using a plurality of control dampers (D) in some cases, thereby saving energy as well as facilitating installation and improving waste heat recovery efficiency. You can get the effect.

100: enclosure 200: blowing fan for exhaust
300: air supply fan 400: filter unit
EA: Exhaust part OA: External part
RA: Ventilation part SA: Supply part

Claims (3)

Ventilation flow used at the place of use by the suction pressure of the exhaust blower fan 200, the air supply blower fan 300, and the exhaust blower fan 200 installed and driven on both sides of the enclosure 100 and the enclosure 100, respectively. By the suction pressure of the ventilation fan (RA) to guide the suction into the interior of the enclosure 100, the exhaust unit (EA) for guiding a part of the ventilation flow into the atmosphere, a part of the ventilation flow along with the suction fan 300 for the air supply. Outside air unit (OA) to guide the outside air intake to the interior of the enclosure 100, the filter unit 400 through which a part of the sucked outside air and ventilation flows, and an air supply unit for supplying a part of the filtered outside air and the ventilation flow to the place of use ( SA), an air conditioner having an exhaust heat recovery function including a rotary heat exchanger (500) provided between an exhaust portion (EA) and an outside air portion (OA) so as to exchange heat between the air flow and the air flow;
Between the exhaust unit EA and the external air unit OA in which the rotary heat exchanger 500 is installed, the exhaust air discharged and the external air introduced therein are discharged immediately without heat exchange without passing through the rotary heat exchanger 500. A bypass flow path is provided for bypassing the bypass flow path. The exhaust flow path bypass damper 610 and the external air bypass damper 620 are respectively installed in the bypass flow path to control the flow rates of the exhaust air and the external air. An air conditioner having an exhaust heat recovery function.
The method according to claim 1;
The rotary heat exchanger (500) is provided in plurality in accordance with the capacity, the air conditioner having an exhaust heat recovery function, characterized in that installed in parallel on the housing (100).
The method according to claim 2;
When the plurality of rotary heat exchangers 500 are installed, the plurality of rotary heat exchangers 500 are connected to form a flow path P, but the exhaust flow paths flow path P through which only the exhaust flows. To configure, the outside air constitutes a flow path (P) that flows only outside air,
Upper and lower portions of the rotary heat exchanger 500 are further provided with a plurality of control dampers (D) for selectively opening and closing the flow path (P), the intermediate damper (D1) is provided on the flow path (P) in accordance with the flow rate Air conditioner having an exhaust heat recovery function, characterized in that for controlling the heat exchange efficiency by adjusting the flow path passing through the rotary heat exchanger (500).

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