Whole building air-conditioning system

Abstract

To provide an air-conditioning system that performs not only ventilation but also heat exchange while circulating conditioned air in a room without increasing a load, when conditioning return air supply to a plurality of rooms throughout the building with an air conditioner.SOLUTION: An air-conditioning box 100 that enables whole building air-conditioning is connected to a third type ventilation device 200. The air-conditioning box 100 comprises an air conditioner 102 above the inside of the box body 101, and has a structure in which it draws in return air supply having flowed into the inside of the box body 101 from an intake port and blows out the conditioned air from an exhaust port. The third type ventilation device 200 comprises a circulating air introduction pipe that introduces indoor circulating air that has circulated inside a room and returned by the whole building air-conditioning, and an outside air introduction pipe that introduces outside air. The circulating air introduction pipe and the outside air introduction pipe are each connected to an inlet side of a heat exchanger, and an outlet side of the heat exchanger is connected to an exhaust pipe that discharges circulating air as exhaust air through an exhaust fan after heat exchange, and is connected to an air supply pipe that flows the outside air into the air-conditioning box 100 as supply air after heat exchange.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an air conditioning system that performs air conditioning for the entire building using an air conditioner for supplying fresh air to multiple rooms. Specifically, when performing third-type ventilation on the air-conditioned air for the entire building, the air-conditioned air discharged for ventilation is heat-exchanged with the outside air newly introduced into the air handling unit to recover heat, and relates to an air conditioning system for the entire building that can achieve this.

Background Art

[0002] Patent Document 1 discloses a ventilation and air conditioning system that is advantageous for a user to obtain good-quality sleep. As shown in FIG. 1 of the same document, an indoor unit of an air conditioner 14 is arranged near the ceiling of the room 90, and a ventilation device 2 equipped with a supply air fan 3 and an exhaust air fan 4 is provided at a ceiling position away from the air conditioner 14. However, although it is described as an invention that controls the ventilation means so that the room temperature rises to the set temperature at the time of waking up, when a ventilation device 2 equipped with a supply air fan 3 and an exhaust air fan 4 is provided at a ceiling position away from the air conditioner 14, in the case of performing air conditioning for the entire building with a large number of rooms, there is a drawback that temperature control is difficult.

[0003] Further, Patent Document 2 describes an invention of control for performing a failure determination of a switching unit 12 in a ventilation device 10A having an air passage switching unit 12. In paragraph 0101 of the same document, it is described that in a house where air conditioning control is performed so as to reach a certain temperature and humidity by air conditioning for the entire building in order to keep the indoor environment constant, the indoor temperature change and the indoor humidity change become smaller, but there is no suggestion of the necessity of ventilation in air conditioning for the entire building.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] As a result of intensive studies to provide an air conditioning system with excellent thermal efficiency when performing ventilation in the whole-building air conditioning by the third type of ventilation, the present inventor has arrived at the present invention.

[0006] Therefore, an object of the present invention is to provide an air conditioning system that can circulate conditioned air indoors without increasing the load when performing whole-building air conditioning of the return air supply of a plurality of rooms with an air conditioner, and that can not only perform ventilation but also perform heat exchange.

[0007] Furthermore, other objects of the present invention will become apparent from the following description.

Means for Solving the Problems

[0008] The above problems are solved by the following inventions.

[0009] (Claim 1) A whole-building air conditioning system in which an air handling unit that sends conditioned air to a plurality of rooms to enable whole-building air conditioning is connected to a third type of ventilation device, The air handling unit includes a box body having an air inlet portion on the upper front surface, and an air conditioner having a suction port above the inside of the box body and a blowout port below, It has a structure that sucks air composed of return air supply flowing into the inside of the box body from the inflow portion through the suction port, and blows out the conditioned air from the blowout port, The third type of ventilation device includes a circulating air introduction pipe that introduces indoor circulating air that has circulated indoors and returned by whole-building air conditioning, and an outdoor air introduction pipe that introduces outdoor air. The circulating air introduction pipe and the outdoor air introduction pipe are each connected to the inlet side of a heat exchanger, On the outlet side of the heat exchanger, an exhaust pipe that discharges the circulating air as exhaust air through an exhaust fan after heat exchange is connected, and an air supply pipe that allows the outdoor air to flow into the air handling unit as supply air after heat exchange is connected. A whole-building air conditioning system characterized by this. (Claim 2) A switching valve is provided between the circulating air inlet pipe and the outside air inlet pipe, and the heat exchanger, respectively. When heat exchange by the heat exchanger is not performed, the switching valve is actuated so that the circulating air entering from the circulating air inlet pipe is exhausted from the exhaust pipe via the exhaust fan, and the outside air entering from the outside air inlet pipe flows into the air handling unit as supply air via the supply air supply pipe. The whole-building air conditioning system according to claim 1, characterized in that

Advantages of the Invention

[0010] According to the present invention, when performing whole-building air conditioning of latent heat supply for a plurality of rooms with an air conditioner, it is possible to provide an air conditioning system that can circulate conditioned air in the room without increasing the load, and can not only perform ventilation but also perform heat exchange.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0012] Hereinafter, preferred embodiments of the present invention will be described. Based on FIGS. 1 to 3, an embodiment of the whole-building air conditioning system of the present invention will be described. The whole-building air conditioning system is configured by connecting an air handling unit 100 that sends conditioned air to a plurality of rooms to enable whole-building air conditioning, and a third type of ventilation device 200.

[0013] (Air handling unit) The air conditioner box 100 is constituted by, for example, a rectangular box body 101. Inside the box body 101, one air conditioner 102 is provided. In this embodiment, a plurality of rooms, for example, as shown in FIG. 1, five rooms R1 to R5 are air-conditioned throughout the building with one air conditioner.

[0014] To form a suitable air conditioner box, the air conditioner 102 is detachably fixed to the back wall 103 of the box body 101 at the upper part inside the box body 101.

[0015] The air conditioner 102 has a suction port 104 at the upper part and a blowout port 105 at the lower part, and has both air-conditioning functions of cooling and heating. The air-conditioning capacity is not particularly limited, but when targeting all rooms of a general single-family house, a general-purpose air conditioner with a maximum air volume of 800 m 3 / Hr can be used.

[0016] The width and depth of the air conditioner box 100 depend on the width and depth of the air conditioner. For example, when the air conditioner has a width of 800 mm and a depth of 390 mm, the air conditioner box 100 may have a width range of 850 to 1100 mm and a depth range of 600 to 700 mm.

[0017] On the front wall 106 of the box body 101, an air inflow part 107 composed of return air supply opens at the upper front part. Here, "reten" means "return" and means circulated air.

[0018] In this embodiment, among the air composed of return air supply flowing into the box body 101 from the inflow part 107, the streamline of the air-conditioned air sucked from the suction port 104 of the air conditioner 102 and blown out from the blowout port 105, and the streamline of the air composed of return air supply flowing in from the inflow part 107 that is not sucked from the suction port 104 are dynamically crossed at the streamline intersection part 108.

[0019] In the air conditioner 100 of this embodiment, as shown in FIG. 2, a static mixing space 109 having a predetermined volume for generating air-conditioning air that is statically mixed and has no temperature unevenness is formed below the streamline intersection portion 108. Having no temperature unevenness means that the temperature approaches the target temperature and the difference in the temperature of the air-conditioning air with respect to the target temperature becomes small. And whether viewed horizontally or vertically, the temperature distribution is uniform, and air-conditioning air with no temperature variation is generated.

[0020] The air-conditioning air with no temperature variation is blown into a plurality of rooms to be air-conditioned in a house using a fan. That is, with one air conditioner, a plurality of rooms in a house can be air-conditioned, and as a result, the temperature variation in the plurality of rooms in the house is eliminated.

[0021] The size of the mixing space 109 is the region from the lower end of the streamline intersection portion 108 to the vicinity of the air outlet of the fan 111. When the size of the box body 101 is, for example, 900 mm in width × 650 mm in depth × 1700 mm in height, it is preferably 900 mm in width × 400 mm in depth × 200 mm in height.

[0022] In this embodiment, as shown in FIG. 3, it is preferable to provide a distribution chamber 110 below the mixing space 109. The distribution chamber 110 is preferably connected with a plurality of fans 111. With such a plurality of fans 111, the air-conditioning air can be distributed to each room to be air-conditioned. To convey the air-conditioning air to each room by such a fan 111, it is preferable that a duct connected to the air conditioner 100 and each room is provided. In this embodiment, the fan 111 does not have to be connected to the distribution chamber, and may be provided in the vicinity of the mixing space 109.

[0023] The air handling unit 100 that constitutes the whole-building air conditioning system of the present invention includes a box body 101 having an air inlet portion 107 on the upper front surface, and an air conditioner 102 having a suction port 104 above the inside of the box body 101 and a blowout port 105 below. This air handling unit 100 has a structure that sucks air composed of return air supplied from the inlet portion 107 into the box body 101 through the suction port 104 and blows out the air conditioned from the blowout port 105.

[0024] (Ventilation device) The ventilation device 200 is a third-type ventilation device having a power source such as an exhaust fan 201 only on the exhaust side for ventilation.

[0025] The third-type ventilation device 200 is preferably provided adjacent to the air handling unit 100. For example, as shown in FIG. 2, a ventilation box can be formed adjacent to the upper part of the air handling unit 100, and the ventilation device 200 can be provided inside. Alternatively, it can be provided at any location in the whole-building air conditioning room.

[0026] In FIG. 4, 202 is a circulating air introduction pipe for introducing the indoor circulating air that has circulated and returned indoors by the whole-building air conditioning, and 203 is an outdoor air introduction pipe for introducing outdoor air.

[0027] The circulating air introduction pipe 202 and the outdoor air introduction pipe 203 are each connected to the inlet side of the heat exchanger 204. An exhaust pipe 205 for discharging the circulating air as exhaust air after heat exchange is connected to the outlet side of the heat exchanger 204. Also, a return air supply pipe 206 for sending the outdoor air to the air handling unit 100 as return air supply after heat exchange is connected to the outlet side of the heat exchanger 204. In the illustrated example, the heat exchanger 204 is of a coil type, but is not particularly limited.

[0028] 207 is a switching valve when the indoor circulating air is not sent to the heat exchanger 204, and 208 is a switching valve when the outdoor air is not sent to the heat exchanger 204. 209 and 210 are switching valves for preventing backflow.

[0029] When heat exchange is not performed by the heat exchanger, the switching valves 207 and 209 are actuated, and the circulating air that enters from the circulating air introduction pipe 202 is exhausted from the exhaust pipe 212. Also, the outside air that enters from the outside air introduction pipe 203 flows into the air conditioning box 100 through the air supply pipe 211 by actuating the switching valves 208 and 210. 201 is an exhaust fan, and the unit of the exhaust fan 201 exhausts the circulating air as exhaust air through the exhaust pipe 212. In FIG. 4, various pipes may use steel pipes, or ducts can be used if necessary.

[0030] Next, the operation of the whole-building air conditioning system will be described by dividing it into winter, summer, and spring / autumn. (Winter) For example, in winter, the outdoor temperature is low and the indoor temperature is higher than the outside air outdoors. That is, since the temperature difference between the outside and the outside is large, the circulating air heated by the whole-building air conditioning and circulated indoors, and the outside air (cold air) are introduced from the pipes 202 and 203 respectively, and heat exchange is performed in the heat recovery unit equipped with the heat exchanger 204. The circulating air indoors is cooled by the outside air, sent to the unit of the exhaust fan 201, and exhausted to the outside from the exhaust pipe 212 (which may be a duct). The outside air is warmed by the circulating air indoors in the heat exchanger 204 and sent to the air conditioning box 100 that constitutes the whole-building air conditioning unit through the air supply pipe 211.

[0031] After entering the air conditioning box 100, the outside air (air supply) is mixed with the return air supply. The outside air and the return air supply are heated by the air conditioner 102, diffused into a plurality of rooms, and the whole building is air-conditioned.

[0032] (Summer) For example, in summer, the outdoor temperature is high and the indoor temperature is lower than the outside air outdoors. That is, since the temperature difference between the outside and the outside is large, the indoor air cooled by the whole-building air conditioning and the outside air (warm air) are introduced from the pipes 202 and 203 respectively, and heat exchange is performed in the heat recovery unit having the heat exchanger 204. With indoor circulating air, the heat of the outside air is recovered, the circulating air is warmed, sent to the unit of the exhaust fan 201, and exhausted to the outside from the exhaust pipe or exhaust duct 212. The outside air entering from the pipe 203 is cooled by the circulating air and sent to the air conditioner 100 via the pipe 211. After entering the air conditioner 100, it is mixed with the LPG supply air. The LPG supply air is cooled by the air conditioner 102, diffused into the room, and the whole building is air-conditioned. It may be cooled, diffused into a plurality of rooms, and supplied to the whole building through the mixing space 109 of the air conditioner 100.

[0033] (Spring and Autumn) For example, in spring and autumn, since the temperature difference between the outside and the inside is small, the temperature-controlled indoor circulating air does not perform temperature adjustment for ventilation. The switching valves 207, 209 and the switching valves 208, 210 are operated so that the outside air to be supplied does not pass through the heat recovery unit having the heat exchanger 204, and the flow path is switched to send it to the unit of the exhaust fan 201. Exhaust to the outside from the exhaust pipe 212 (which may be a duct).

[0034] As described above, by using the heat exchanger 204, the outside air after heat exchange flows into the air conditioner, and the effect of reducing the load on the air conditioner can be achieved. For example, in winter, if cold outside air is directly supplied to the air conditioner 100, energy is required to warm the cold air. That is, the air conditioner has a greater load. However, by using the heat exchange 204, the outside air warmed by the indoor circulating air flows into the air conditioner 100, so even when mixed with the LPG supply air, less energy is required for warming than when the heat exchanger 204 is not used. That is, the load on the air conditioner can be reduced. Conversely, in summer, by recovering the heat of the outside air with the heat exchanger 204, the temperature of the outside air drops, so less energy is required to cool the warm air. That is, the load on the air conditioner can be reduced.

[0035] As described above, the switching according to the season has been explained, but it is not limited to this. When the temperature difference between the outside air and the indoor air is small, the heat exchanger is not used, and when it is large, the flow path can be switched by the switching valves 207 to 210 so as to use the heat exchanger.

[0036] In the case of the ventilation device of the third type ventilation system, the present invention usually does not use a heat exchanger. In the charging device of the third type ventilation system, the air flow is natural intake and forced exhaust by a fan.

[0037] The ventilation system with heat exchange is used in the first type ventilation system in which one supply fan and one exhaust fan are installed. However, compared with the first type ventilation, the third type ventilation having a fan only on the exhaust side is advantageous in terms of cost reduction. On the other hand, since it does not have a supply fan, even if a heat exchanger is provided, it has been difficult to supply air to each room in the house.

[0038] According to the present invention, the natural intake of the third type ventilation is not introduced into each room in the house, but is introduced into the air handling unit and introduced into each room through the air handling unit. Therefore, even when a heat exchanger is provided in the third type ventilation device to perform heat exchange between the supply air and the exhaust air, since the air flow is formed by the air handling unit of the present invention, the intake of the heat exchange ventilation device can be pulled, and thus the supply air can be easily introduced into the air handling unit. As a result, the air handling unit can create circulating air, and the supply air introduced into the air conditioner of the air handling unit is also the supply air that has been heat exchanged, so that the effect of reducing the load on the air conditioner can be exerted.

[0039] Furthermore, even in the intermediate period when the outside air temperature is lower than the room temperature, there may be a cooling load on a fine day. According to the present invention, it is possible to cool with the outside air without operating the air conditioner in the intermediate period, and the effect of energy saving is achieved. Furthermore, if the heat insulation performance of the house is improved, the frequency of cooling generation in the intermediate period increases, so that the effect can be more exerted.

Explanation of reference numerals

[0040] 100 Air handling unit 101 Cabinet 102 Air conditioner 103 Rear wall 104 Suction port 105 Outlet 106 Front wall 107 Inflow section 108 Streamline intersection 109 Mixing space 110 Distribution chamber 111 Fan 200 Third type of ventilation device 201 Exhaust fan 202 Circulating air inlet pipe 203 Outdoor air inlet pipe 204 Heat exchanger 205 Exhaust pipe 206 LPG supply pipe 207, 208, 209, 210 Switching valves 211 LPG supply pipe 212 Exhaust pipe

Claims

1. An air-conditioning system for a whole building in which an air-conditioning box that sends conditioned air to a plurality of rooms to enable whole-building air-conditioning and a third-type ventilation device are connected, wherein the air-conditioning box includes a box body having an air inlet portion on the upper front surface, and includes an air conditioner having a suction port above the inside of the box body and a blowout port below, and has a structure that sucks air composed of return air supplied from the inlet portion into the inside of the box body through the suction port and blows out the conditioned air from the blowout port, the third-type ventilation device includes a circulating air introduction pipe that introduces indoor circulating air that has circulated and returned indoors by whole-building air-conditioning and an outdoor air introduction pipe that introduces outdoor air, and the circulating air introduction pipe and the outdoor air introduction pipe are each connected to the inlet side of a heat exchanger, and an exhaust pipe that discharges the circulating air as exhaust air through an exhaust fan after heat exchange is connected to the outlet side of the heat exchanger, and an air supply pipe that allows the outdoor air to flow into the air-conditioning box as supply air after heat exchange is connected thereto. The whole-building air-conditioning system is characterized by this.

2. A switching valve is provided between the circulating air introduction pipe and the outdoor air introduction pipe and the heat exchanger, respectively. When heat exchange by the heat exchanger is not performed, the switching valve is operated, so that the circulating air that has entered from the circulating air introduction pipe is configured to be exhausted from the exhaust pipe through the exhaust fan, and the outdoor air that has entered from the outdoor air introduction pipe is configured to flow into the air-conditioning box as supply air through the air supply pipe. The whole-building air-conditioning system according to Claim 1 is characterized by this.

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