JPH035787Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an air conditioner that utilizes indoor surplus air as a heat source.

[Conventional technology]

In office buildings, etc., in accordance with the abbreviated ``Building Plumbing Act,'' outside air is conditioned by a main air conditioner installed in a basement or other location to match the number of people in the room, and then supplied from air outlets in the ceiling. There is. In addition, a portion (usually 20 to 30% of the outside air intake) is exhausted to the outside from toilets, water heaters, etc. The difference between the amount of outside air taken in and the amount of exhaust air from the toilet, water heater room, etc. becomes surplus air, and this surplus air is exhausted outside through the surplus exhaust duct or return air duct.

FIG. 4 shows this conventional example, in which the conditioned air from the main air conditioner 1 is blown out from the outlet 3 through the attic duct 2, and a fan coil unit 50 for local air conditioning is used to supplement the air conditioning. Indoor air is taken in, the temperature is adjusted, and then it is blown out into the room. 51 is a hot and cold water pipe for the fan coil unit 50; 52 is a fan coil unit 5;
This is the drain pipe from 0.

On the other hand, in recent years, integrated wall-through type air conditioners are sometimes used for local air conditioning.

[Problem that the invention attempts to solve]

However, the wall-through type air conditioner requires large openings in the outer wall for intake and exhaust of outside air, which increases construction costs and requires piping for drainage.

Furthermore, the above-described method of installing the fan coil unit and arranging it separately from the main air conditioner requires cold/hot water piping and drain piping, which requires a great deal of effort and cost for piping work.

On the other hand, in recent years, as the interiors of buildings have become more airtight, many office automation equipments have been installed indoors, and their heat output has increased. As a result, the indoor heat load increases, necessitating a method such as the present method to remove some kind of incremental heat amount.

The main purpose of this invention is to effectively utilize the heat of excess indoor air to save energy as a whole, as well as to eliminate the need for cold/hot water and drain piping, making air conditioning extremely economical. The goal is to provide equipment.

[Means for solving problems]

The present invention to solve the above problem is to install a separate compressor and a compressor that takes in indoor air into the building, in addition to the main air conditioner that takes in outside air for air conditioning. It is integrally equipped with an indoor air supply system that supplies air into the room and an outdoor exhaust system that takes in indoor air and exhausts it to the outdoors. An exhaust heat exchanger provided in the system and the compressor constitute a heat pump in which one of the supply air heat exchanger and the exhaust heat exchanger is an evaporator and the other is a condenser depending on the season, The recovered heat of the exhaust gas passing through the exhaust heat exchanger is given to the supply air heat exchanger.
It is characterized by this.

[Effect]

In this invention, when attempting to locally air condition a room separately from the main air conditioner, when exhausting excess indoor air, an exhaust heat exchanger is used to recover the heat in the exhaust air and transfer it to the indoor air. When the air is taken in and resupplied indoors, it is fed to the supply air heat exchanger. In addition, by configuring a heat pump with heat exchangers for exhaust air and air supply, and a single compressor, air conditioning is performed according to the seasons of summer and winter.

Therefore, the heat possessed by the surplus air can be effectively used, and for example, by using 400m ³ /hr of surplus air, it is possible to obtain an output of approximately 1800Kcal/hr. Furthermore, inside the device, it is sufficient to connect the exhaust duct to the existing exhaust duct, and the construction cost is extremely low compared to the conventional fan coil unit system, which requires cold and hot water piping. The drain from the heat exchanger is either sprayed into the exhaust system and released into the atmosphere along with the exhaust gas, or sprayed into the indoor air system to humidify indoor return air, so drain piping is not required.

〔Example〕

Next, the present invention will be explained in more detail with reference to embodiments shown in FIGS. 1 to 3.

The device M of the present invention is installed, for example, near a window in a room, with a central compressor section 10A and left and right air supply system sections 1.
0B and exhaust system section 10C are integrated. These are integrated at the time of installation, but they are brought in separately and then connected and integrated.

A four-way valve 11A is attached to the compressor 11, and an air supply heat exchanger 12 provided in the air supply system section 10B and an exhaust heat exchanger 1 provided in the exhaust system section 10C.
3 is connected. In addition, both heat exchangers 12, 1
3 is a coil tube 14 that acts as an expansion valve;
and a connecting pipe 16 equipped with a flow rate regulator 15.

Further, filters 17 and 18 are provided on the front surfaces of both heat exchangers 12 and 13, and a portion of the indoor air passes through the filter 18 and the exhaust heat exchanger 13, and is then sent to the exhaust fan 19 via the exhaust duct 20. While some indoor air passes through the filter 17 and the supply air heat exchanger 12,
There, the temperature is adjusted and air is supplied into the room by an air supply fan 21.

In this system, during cooling operation in the summer, the exhaust heat exchanger 13 is operated as a condenser using excess heat from the exhaust gas, and the supply air heat exchanger 12 is operated as an evaporator, converting indoor air into supply air. After being cooled (dehumidified) by the indoor heat exchanger 12, the air is supplied into the room, and the heat taken from the indoor air is given to the exhaust heat exchanger 13, and is discharged outdoors along with the exhaust gas.
In winter, conversely, the supply air heat exchanger 12 is operated as a condenser to generate warm air and supplied into the room, while the exhaust heat exchanger 13 is operated as an evaporator and is operated as an exhaust fan. 19 to exhaust the cold air to the outside.

In this case, in the summer, the supply air heat exchanger 12
The condensed water discharged from the exhaust gas is collected in a drain pan 22, and is sprayed by a pump 23 through a two-way valve 24 to an exhaust heat exchanger 13 and discharged to the outside together with the exhaust gas. In winter, condensed water discharged from the exhaust heat exchanger 13 is pumped up in the same way and transferred to the supply air heat exchanger 2.
1 to humidify the air supplied into the room. This eliminates the need for drain piping outside the device.

Further, a temperature detector 25 is provided in the indoor air intake section, for example, in front of the supply air heat exchanger 12, and temperature detectors 26 and 27 are provided near the coil tube 14 and near the exhaust heat exchanger 13, respectively.
Indoor air and refrigerant temperatures are taken into the temperature controller 28, and the output of the compressor 11 is linearly controlled or the compressor is turned on and off to control the supply air temperature via the inverter controller 29. ing. Moreover, for switching between summer and winter, the configuration is such that the flow path is switched via the operating section 11B of the four-way valve 11A.

In the above example, when the air conditioner according to the present invention is attached to an existing building, the exhaust duct 20 is
Just connect it to the existing exhaust duct.

[Effect of idea]

As described above, according to the present invention, it is possible to effectively utilize the heat held by the surplus air in the room, thereby saving energy.Compared to conventional methods, only a new exhaust duct is required, which reduces construction costs. , and equipment costs can also be reduced.

[Brief explanation of drawings]

FIG. 1 is a system diagram of the device of the present invention, FIG. 2 is a perspective view, FIG. 3 is a schematic diagram of an indoor installation situation, and FIG. 4 is a schematic diagram of a conventional example. 1... Main air conditioner, 11... Compressor, 11
A...Four-way valve, 12...Air supply heat exchanger, 13...
...Exhaust heat exchanger, 14...Tube coil (expansion valve), 19...Exhaust fan, 20...Exhaust duct, 21...Air supply fan.

Claims (1)

[Scope of Claim for Utility Model Registration] A device that is installed separately in addition to the main air conditioner that air-conditions the interior of a building while taking in outside air, and that includes one compressor and a unit that takes in indoor air and supplies air to the room. The indoor air supply system is integrally equipped with an indoor air supply system that takes in indoor air and exhausts it to the outdoors, and an air supply heat exchanger installed in the indoor air supply system and an outdoor exhaust system The exhaust heat exchanger and the compressor constitute a heat pump in which one of the supply air heat exchanger and the exhaust heat exchanger is an evaporator and the other is a condenser depending on the season, An air conditioner using indoor surplus air, characterized in that heat recovered from exhaust gas passing through an exchanger is given to the supply air heat exchanger.