JPS63197831A - Residential central supply/exhaust and exhaust heat recovery equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a central heating system for residential use that performs ventilation in each room of a residential house in a centralized manner and recovers exhaust heat from the exhaust gas as a heat source for a heat pump for heating and cooling the house. Regarding exhaust gas and waste heat recovery equipment.

[Conventional technology]

In houses, rooms are generally ventilated by opening and closing windows each time, and this sometimes wastes the cold and warm air in the corner-cooled room.

In order to recover waste heat that is wasted and reduce heat costs, we have conventionally adopted an exhaust heat recovery method using an absorption heat exchanger using lithium chloride solution, or recovered exhaust heat from ventilation into the heat source of a heat pump. Exhaust heat recovery methods have been proposed.

[Problem that the invention seeks to solve]

However, in order to recover waste heat from ventilation of the entire house, the former method requires installing the heat exchanger in each room and recovering waste heat in each room, while the latter method requires installing a ventilation duct in each room. It is necessary to install a heat pump and connect it to a heat pump, making the equipment for both complicated, so it has not been put into practical use yet.

The present invention has been made to solve the above problems, and its purpose is to provide ventilation in a centralized manner, without installing a heat exchanger or ventilation duct in each room. An object of the present invention is to provide a residential centralized air supply/exhaust system and an exhaust heat recovery device capable of recovering exhaust heat.

[Means for solving problems]

In order to achieve the above object, the present invention provides an air supply port and an exhaust port equipped with a damper and a fan in the attic of a house, and connects the air supply port and exhaust port through a central air supply duct and a central exhaust duct, respectively. The heat pump communicates with each room, and is characterized in that an outdoor refrigerant coil of the heat pump for heating and cooling a house is installed at the exhaust port.

[For production]

With the above configuration, each room is ventilated throughout the house through the central air supply duct and the central exhaust duct, without having to open or close the windows of each room, and exhaust heat can be recovered from one location, simplifying the equipment. .

[Implementation cooling]

The present invention will be explained in detail below based on illustrated embodiments.

FIG. 1 is a schematic cross-sectional view of a house to which the present invention is applied. In the figure, 1 is a house, 2 is a vertically cylindrical heat storage tank installed in the center of the house 1, and the outer periphery of this tank has a space. It is separated from the living space of the house through a heat insulating wall 3, and the space is divided into an air supply duct 5 and an exhaust duct 6 by a vertical partition wall 4. The heat storage tank 2 stores cold and hot water produced using low-grade late-night electricity, and is used for heating and cooling a house and for daily use.

An air supply port 8 and an exhaust port 9 are provided in the attic 7 of the house 1,
Each has a louver 8a to prevent rainwater from entering.

9a, dampers 8b and 9b for adjusting the opening degree, an air supply fan 8c, and an exhaust fan 9C. The air supply port 8 is communicated with the air supply duct 5 via the damper 5a, and the exhaust port 9 is communicated with the exhaust duct 6, respectively, and the air supply port 8 and the exhaust port 9 are short-circuited via the damper 10. . The air supply duct 5 is communicated with an outlet 15 of each room 14, and the exhaust duct 6 is communicated with an inlet 17 such as the ceiling of each room 14 or the atrium 16 of a stairwell.

11 is a heat pump installed outdoors, with a refrigerant compressor,
It has a built-in indoor refrigerant coil, an expansion valve, a liquid receiving tank, a cooling/heating switching valve, etc., and the secondary side of the indoor refrigerant coil lla is connected to the heat storage tank 2 through a circulation pipe 12 to cool or heat the water stored in the heat storage tank 2. On the other hand, the outdoor refrigerant coil llb is installed at the exhaust port 9 in the attic 7 and connected to the heat pump 11 by a circulation pipe 13.

The operation of the device of the present invention on ridges will be explained below with reference to FIGS. 2 to 4.

Figure 2 shows the exhaust gas in which the damper 8b of the air supply port 8, the damper 5a of the air supply duct 5, and the damper 9b of the exhaust port 9 are fully opened, and the damper 10, which short-circuits the air supply port 8 and the exhaust port 9, is half-open. This shows a mode during heat recovery ventilation, at which time the heat pump 11 is operated, cold water or hot water is stored in the heat storage tank 2, and the windows 14a of each room are closed. When the air supply fan 8c and the exhaust fan 9c are operated, part of the outside air flows from the air supply port 8 into the air supply duct 5, and part of the outside air passes through the damper 10 and is short-circuited directly to the exhaust port 9. is discharged. The supply air flowing into the supply air duct 5 touches the outer periphery of the heat storage tank 2 and is cooled or heated, and the cold or warm air flows into the room from the outlet 15 of each room 14 to cool or heat the room 14. Thereafter, the air is collected from each suction port 17 into the exhaust duct 6 and discharged from the exhaust port 9. At the time of this discharge, the exhaust heat in the exhaust air that gradually increases in temperature or decreases in temperature but is still lower or higher than the outside temperature is exchanged by the outdoor refrigerant coil lla of the heat pump 11, and the load of the heat pump 11 is transferred to the outside air. Reduced compared to the case of only

The reason why a part of the outside air is mixed with the exhaust air after cooling and heating in the above is that the heat source required for the heat pump 11 is supplemented by the outside air when the exhaust gas after heating and cooling is insufficient.

FIG. 3 shows a ventilation mode in which exhaust heat is not recovered, that is, the heat pump 11 is not operated, and ventilation is performed through the windows 14a of each room 14.
When closing the air supply fan 8C and exhaust fan 9C,
Cooling and heating are performed by storing heat in the heat storage tank 2. In this case, the damper 8b of the air supply port 8, the damper 5a of the air supply duct 5, the exhaust port 9
The damper 9b is fully opened, and the damper 10, which short-circuits the air supply port 8 to the exhaust port 9, is fully closed because there is no need to replenish outside air as a heat source for the heat pump 11. The supply air is then cooled or heated in the supply air duct 5 by the heat storage tank 2,
After each room 14 is cooled or heated, it is collected in the exhaust duct 6 and discharged from the exhaust port 9.

FIG. 4 shows the ventilation mode using natural ventilation, in which the window 14a of the room 14 is opened, the air supply fan 8C1 and the exhaust fan 9c.
, the heat pump 11 is stopped, the damper 8b of the air supply port 8,
Damper 5a of supply air duct 5, damper 9b of exhaust port 9
is fully open, and the damper 10 short-circuits the air supply port 8 and the exhaust port 9.
is completely closed, and natural ventilation blowing from the air supply port 8 to the exhaust port 9 attracts exhaust air from the exhaust duct 6 to the exhaust port 9, thereby promoting natural ventilation from the window 14a.

In addition, in all the three modes mentioned above, the ventilation efficiency is the best when the direction of the air supply port 8 is made to match the direction of the prevailing wind in the area.

In the above embodiment, the heat storage tank 2 is installed in the center of the house 1,
The cold and hot water produced by the heat pump 11 is stored in the heat storage tank 2 to be used for heating and cooling the house l and for daily use, and the space between the heat storage tank 2 and its insulating wall 3 is connected to the air supply duct 8.
The atrium 16 and the stairwell are used as the exhaust duct 6, but if the heat storage tank 2 is not installed, an air supply duct leading to the air supply port 8 and the exhaust port 9 in the attic 7 is installed in the center of the house l. An exhaust duct is installed to concentrate the air supply and exhaust, and an indoor cold/hot water coil of the heat pump 11 is installed in each room.
Cold and hot water is circulated through this to cool and heat each room 14.

〔Effect of the invention〕

As described in detail above, according to the present invention, an air supply port and an exhaust port equipped with a damper and a fan are provided in the attic of a house, and the air supply port and exhaust port are connected to a central air supply duct and a central exhaust exhaust port, respectively. Each room is connected through a duct, and the outdoor refrigerant coil of the heat pump for residential air conditioning and heating is installed at the exhaust port, so ventilation in each room is achieved by central air supply without having to open or close windows in each room. The ducts and central exhaust ducts perform ventilation throughout the entire house, and the exhaust heat is collected in one place, simplifying the equipment.Furthermore, ventilation modes can be freely selected.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a schematic sectional view of a house to which the present invention is applied; Fig. 2 is a state diagram showing the mode during exhaust heat recovery ventilation; and Fig. 3 is a diagram showing the mode of exhaust heat recovery ventilation. FIG. 4 is a state diagram showing a mode when ventilation is not performed, and FIG. 4 is a state diagram showing a mode when ventilation is performed by natural ventilation. 1... House, 5... Air supply duct, 5a, 8b, 9b
. 10... Damper, 6... Exhaust duct, Ma... Attic, 8... Air supply port, 8C... Air supply fan, 9...
- Exhaust port, 9b...damper, 11...heat pump, lla...indoor refrigerant coil, llb...outdoor refrigerant coil.

Claims (2)

[Claims] (1) An air supply port and an exhaust port equipped with a damper and a fan are provided in the attic of the house, and the air supply port and exhaust port are communicated with each room through a central air supply duct and a central exhaust duct, respectively; A residential centralized air supply/exhaust and exhaust heat recovery device, characterized in that an outdoor refrigerant coil of the heat pump for residential cooling/heating is installed at the exhaust port. (2) The residential centralized air supply/exhaust and exhaust heat recovery device according to claim 1, wherein the air supply port and the exhaust port are short-circuited via a damper.