JPH07301439A - Heat exchanging and ventilating device - Google Patents

Abstract

PURPOSE:To provide a heat exchanging and ventilating device, highly efficient in the recovery of heat of exhaust gas and inexpensive in the cost thereof. CONSTITUTION:An exhausting unit 3 for exhausting air in a room is connected to the air heat utilizing side heat exchanger 2 of a heat pump 1. The cold and hot heat utilizing side heat exchanger 4 of the heat pump 1 is connected to a heat accumulating tank 5. The heat accumulating tank 5 is connected to heat exchangers 6 for indoor cooling and heating.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchange ventilation device for effectively recovering exhaust heat from a room in a heat pump system for cooling and heating.

[0002]

2. Description of the Related Art Conventionally, in heating and cooling a room, an outdoor unit 3 installed outside a building 7 as shown in FIG.
0 and an indoor unit 31 installed in each room are connected by a pipe 32, and a refrigerant or hot / cold water is caused to flow through the pipe 32 to cool or heat the room. On the other hand, in order to ventilate each room 8, heat is exchanged for ventilation. In this heat exchange ventilation, the heat exchange ventilation fan 3 that is open to the outside in each room 8 is used.
3 was installed to supply and exhaust air. This heat exchange ventilation fan 33 is equipped with a heat exchange element 34 as shown in FIG. 3, and sucks outdoor air from the direction of the arrow in FIG.
By exhausting the indoor air from the direction of the arrow T, the heat exchange between the indoor air and the outdoor air is performed, and the heat loss due to the exhaust is reduced.

However, in the conventional example of FIG. 2, there is a problem that the heat exchange ventilating fan 31 is required in each chamber 8 and the cost becomes high, and further, there is a problem that a short circuit of supply and exhaust occurs. . Therefore, in order to prevent short-circuiting of the supply and exhaust, a large heat exchange ventilation fan 31 is provided as shown in FIG. 4, and at least one of the intake side and the exhaust side is provided in each room 8 as a vertical or horizontal duct 35 structure that runs in the building 7. It is considered to connect. Reference numeral 18 in FIG. 4 denotes an exhaust opening provided in each room, which communicates with the exhaust inlet side of the heat exchange ventilation fan 31 via the corridor, staircase, and attic space. In this room, each room 8
Vertical and horizontal ducts 35 leading up to
The construction of No. 5 is troublesome and the cost becomes high.

In any of the conventional examples, the heat exchanging element 34 provided in the heat exchanging ventilation fan 31 also needs to have a large area because it is necessary to recover heat from the exhaust gas with high efficiency. Therefore, the blower becomes large. There is a problem. Further, in any of the conventional examples described above, since the external air taken in by the heat exchange ventilation fan 31 is heat-exchanged by the heat exchange element 34 and supplied to the room, the exhaust heat recovered by the heat exchange with the exhaust gas is Returned to room 8 in real time. However, there is a case where it is not necessary to reduce the heat to the room in real time depending on the usage state of the room 8, the time zone, the presence or absence of the heating and cooling operation of the room 8, and the like. In such a case, it cannot be said that the heat exchanged by the heat exchange ventilation fan 31 is effectively used.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to recover exhaust heat with high efficiency and at low cost. To provide a replacement ventilation system.

[0006]

In the heat exchange ventilation system of the present invention, in the heat pump system for cooling and heating, the exhaust unit 3 for exhausting the indoor air is connected to the heat exchanger 2 on the side of utilizing the atmospheric heat of the heat pump 1. The heat exchanger 4 of the heat pump 1 on the cold heat utilization side and the heat storage tank 5 are connected to each other, and the heat storage tank 5 and the indoor heat exchanger 6 for indoor cooling and heating are connected to each other. By adopting such a configuration, the problems of the conventional example described above are solved and the object of the present invention is achieved.

[0007]

According to the present invention having the above-mentioned structure, the exhaust heat in the indoor exhaust is recovered by the heat exchanger 2 on the atmospheric heat utilization side of the heat pump 1, and the recovered heat is the cold heat utilization side of the heat pump 1. The heat is stored in the heat storage tank 5 via the heat exchanger 4 and the heat stored in the heat storage tank 5 is supplied to the indoor cooling and heating heat exchanger 6 when necessary, to cool and heat the room.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings. FIG. 1 shows a schematic piping diagram of the present invention. Reference numeral 7 in the figure denotes a building, and a plurality of rooms 8 are provided in the building 7. The heat pump 1 is arranged in the underfloor space 9 of the building 7. The heat pump 1 is provided with a heat exchanger 2 on the air heat utilization side, which is a condenser or an evaporator, and a heat exchanger 4 on the cold heat utilization side, which is an evaporator or a condenser.

A heat storage tank 5 is arranged in the underfloor space 9 or underground, and the heat exchanger 4 on the cold heat utilization side of the heat pump 1 and the heat storage tank 5 are connected by a pipe 10 and a pump 11
By operating the, the heat medium such as water or brine such as ethylene glycol circulates through the pipe 10 and the heat exchanged by the heat exchanger 4 on the cold heat utilization side is stored in the heat storage tank 5. ing. For example, a heat storage material may be placed in the heat storage tank 5 to store heat in the heat storage material. A heat exchanger 6 for indoor cooling and heating such as a fan coil unit is arranged in each room 8, and a pipe 20 is provided between the heat storage tank 5 and the heat exchanger 6 for indoor cooling and heating such as the fan coil unit of each room 8. The heating medium is supplied to the heat exchanger 6 for indoor cooling and heating by circulating the heating medium such as water or brine such as ethylene glycol by operating the pump 12, and the heat is exchanged here. Thus, each room 8 is cooled or heated.

One end of an exhaust unit 3 for exhausting air from the room is connected to the heat exchanger 2 on the side of the heat pump 1 that uses atmospheric heat, and the other end of the exhaust unit 3 is located inside the room. It is open and serves as a central exhaust port 13. Exhaust part 3
A switching valve 14 is provided at a connection portion with the heat exchanger 2 on the side of using atmospheric heat, and an atmospheric air intake portion 15 is further connected to the switching valve 14, and an end portion of the atmospheric air intake portion 15 is an underfloor space. It opens at 9. A fan (not shown) is installed inside the heat exchanger 2 on the side of using atmospheric heat, and by rotating the fan, the exhaust gas in the room is sucked in from the exhaust part 3 or the underfloor space is supplied from the air intake part 15. 9 is sucked in, and whether the indoor exhaust air is sucked in from the exhaust portion 3 or the air in the underfloor space 9 is sucked in from the air intake portion 15 is performed by switching the switching valve 14. The exhaust pipe 16 is led out from the heat exchanger 2 on the side of utilizing atmospheric heat, and the exhaust gas heat-exchanged by the heat exchanger 2 on the side of utilizing atmospheric heat is discharged. In the embodiment shown in the accompanying drawings, the discharge pipe 16 is led to the outside, but the discharge pipe 1
6 may be opened in the underfloor space 9. In addition, the building 7 is provided with an opening 17 that communicates the underfloor space 9 with the outside.

Each chamber 8 has an opening 18 for exhausting each chamber
The exhaust opening 18 for each room such as a gallery is provided in, for example, a door, and communicates with the central exhaust inlet 13 through an indoor space such as a corridor, a staircase, or an adjacent room 8. . Then, the heat pump 1 is operated to store heat in the heat storage tank 5, and the pump 12 is operated when necessary to cool or heat the chamber 8.

Here, when it is desired to ventilate the room 8,
The switching valve 14 is switched to the central exhaust port 13 to
Exhaust the room as indicated by arrow a. In this case, each room 8
The exhaust air from the exhaust gas flows from the exhaust openings 18 of each room such as a gallery to the corridor, the staircase room, or the adjacent room 8 as shown by arrow B in FIG. Entrance 1
3 is sent to the heat exchanger 2 on the atmospheric heat utilization side. By being forcibly sucked from the concentrated exhaust inlet 13, the outside air flows in through a natural gap of the chamber 8 or the like as shown by arrow C. here,
Each room 8 may be provided with an air supply port individually, or a central air supply port may be provided to inhale air. As described above, according to the present invention, vertical and horizontal ducts for air supply or exhaust that run in the building are not required. Exhaust gas sent from the concentrated exhaust gas inlet 13 to the heat exchanger 2 on the atmospheric heat utilization side as described above is recovered by heat exchange in the heat exchanger 2 on the atmospheric heat utilization side. Is discharged outdoors or into the underfloor space 9. Exhaust heat recovered by heat exchange in the heat exchanger 2 on the heat utilization side of the heat pump 1 is heat-exchanged by the heat exchanger 4 on the cold heat utilization side of the heat pump 1 and stored in the heat storage tank 5. Then, when necessary, the pump 12 is operated to cool or heat the chamber 8. In this way, the exhaust heat in the room is recovered by the heat exchanger 2 on the side of the heat pump 1 that uses atmospheric heat, and the recovered heat is stored in the heat storage tank 5. Therefore, the heat is effectively used when necessary to cool and heat the room 8. You can do it. Although not shown, the heat of the heat storage tank 5 can be used as a heat source for hot water supply.

When the indoor air is not exhausted, the switching valve 14 is switched so that the air in the underfloor space 9 is sucked from the atmospheric air intake portion 15 into the heat exchanger 2 of the heat pump 1 on the atmospheric heat utilization side. The heat-exchanged heat is heat-exchanged by the heat exchanger 4 of the heat pump 1 on the side of utilizing the cold heat and stored in the heat storage tank 5, and the pump 12 is operated when necessary to cool the room 8 or Heating.

Since the heat of the exhaust gas in the room is recovered by using the heat pump 1 as described above, the efficiency of the conventional heat exchange ventilation is 100% at the maximum, and
A recovery rate of ~ 300% can be expected.

[0015]

As described above, according to the present invention, in the heat pump system for cooling and heating, the heat exchanger on the air heat utilization side of the heat pump is connected to the exhaust portion for exhausting the indoor air, and the heat pump cooling system is cooled. Since the heat exchanger on the heat utilization side and the heat storage tank are connected, and the heat storage tank and the heat exchanger for indoor cooling and heating are connected, the heat exchanger on the air heat utilization side of the heat pump is used to exhaust the indoor exhaust gas. Exhaust heat can be recovered, the recovery efficiency of exhaust heat is high, and because the heat exchanger on the cold heat utilization side of the heat pump is also used for recovery of exhaust heat, a separate heat exchange element is provided as in the past. A heat exchange ventilation fan is no longer required, and the air supply and exhaust ports can be separated for heat exchange ventilation, and vertical and horizontal ducts for exhaust running inside the building are not required, which simplifies construction and is inexpensive. It is also Rather than recovering and recovering the heat of the heat in the room in real time, the exhaust heat efficiently recovered by the heat exchanger on the heat utilization side of the heat pump is temporarily stored in the heat storage tank. It can be used for heating and cooling the room, which is necessary when doing.

[Brief description of drawings]

FIG. 1 is a schematic piping diagram of an embodiment of the present invention.

FIG. 2 is a schematic piping diagram of a conventional example.

FIG. 3 is a schematic explanatory view of a heat exchange element used in the above.

FIG. 4 is a schematic piping diagram of another conventional example.

[Explanation of symbols]

 1 heat pump 2 heat exchanger 3 exhaust part 4 heat exchanger 5 heat storage tank 6 indoor cooling and heating heat exchanger

Claims (1)

[Claims] 1. A heat pump system for cooling and heating, wherein an exhaust unit for exhausting air indoors is connected to a heat exchanger on the side of utilizing heat of the heat pump, and a heat exchanger on the side of utilizing heat on the cold side of the heat pump and a heat storage tank are connected. A heat exchange ventilator comprising a heat storage tank and an indoor cooling and heating heat exchanger connected to each other.