JPH10176845A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the maintenance and inspection of a ventilating unit in a 2 by 4 method residence or the like. SOLUTION: Heat recovery devices and a ventilating blower 31 are provided in the casing 32 of a ventilating unit 30 and a maintenance and inspection cover 38 serving as a part of a ceiling 35b is provided on the first floor ceiling 35b of a house. Further, between the maintenance and inspection cover 38 and the body 32, a refrigerant pipeline 36c is connected through a pipeline connecting part 36b to the refrigerant inlet and outlet 36a of the heat recovery devices to circulate a refrigerant to the heat recovery devices. Further, a drain pipe 37c for draining outside water due to dew condensation from the heat recovery devices is connected to a drain port 37a through a drain connecting part 37b. Thus, when the maintenance and inspection cover 38 is closed, the maintenance and inspection cover 38 constitutes a part of the first floor ceiling 35b and when it is opened, the maintenance and inspection of all the body 32 can be done from an opening part 39.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suitable air conditioner installed in a house having a dimension such as a 2.times.4 house, and particularly to a ventilation unit for ventilating indoors. The present invention relates to an air conditioner having a function of recovering heat of air to be heated and having a maintenance inspection lid so as to house the ventilation unit.

[0002]

2. Description of the Related Art Conventionally, there has been proposed an air conditioner for cooling and heating the inside of a room using a heat pump. For example, in Japanese Patent Publication No. 63-46335, an indoor unit equipped with an indoor heat exchanger and an indoor fan, a compressor, an outdoor unit-side heat exchanger, BACKGROUND ART An air conditioner having an outdoor unit or the like including a fan, an outside air inlet serving as an intake of outside air, and a damper for adjusting an intake amount of outside air is disclosed.

[0003] By adjusting the degree of opening and closing of the damper, the intake resistance of the outside air sucked into the outdoor unit through the outside air suction port is adjusted, and the amount of outside air sucked into the outdoor unit is adjusted. . At this time, since the outdoor fan is rotating regardless of the degree of opening and closing of the damper, if the amount of outside air taken into the outdoor unit fluctuates, the indoor air flows through the communication pipe by an amount corresponding to the fluctuation amount. The air is taken into the outdoor unit.

[0004]

However, to recover the heat of the indoor air, the communication pipe is made to have a negative pressure by rotating a fan provided in the outdoor unit, whereby a part of the indoor air is removed from the outdoor heat exchanger. , And heat recovery of the air exhausted for ventilation by the outdoor heat exchanger is performed, so that most of the air supplied to the outdoor heat exchanger by the fan is outdoor air.

Therefore, the amount of indoor air exhausted to the outside, particularly the amount of indoor air guided to the outdoor heat exchanger, is small.
It was difficult to increase the amount of heat recovered.

In addition, since dimensions such as 2 × 4 houses are prescribed (for example, dimensions between nests), there is a problem that maintenance and inspection cannot be performed efficiently with the above configuration.

Accordingly, the present invention is to provide an air conditioner which can improve the efficiency of heat recovery of exhausted indoor air and can easily perform maintenance and inspection even when used in a standard house. Aim.

[0008]

In order to solve the above-mentioned problems, in cooling, a refrigerant is compressed by a compressor to become a high-temperature and high-pressure gas refrigerant, and exchanges heat with outside air in an outdoor heat exchanger.
Most of the liquefied gas-liquid refrigerant is sent to the heat recovery unit as a refrigerant. In the heat recovery unit, the refrigerant exchanges heat with cold indoor air that is exhausted outdoors for ventilation, and the remaining gas refrigerant is liquefied. By eliminating the gas refrigerant, the temperature of the liquid refrigerant can be further reduced, and the thermal efficiency of the cycle increases. Then, the refrigerant is sent to the pressure reducer, the flow rate of the refrigerant is reduced by the pressure reducer, the pressure is reduced and evaporated by the indoor heat exchanger, and the refrigerant exchanges heat with the air blown to each room.
As a result, the air blown to each room becomes cool air, and the rooms are cooled. Thereafter, the refrigerant returns to the compressor.

At the time of heating, the refrigerant is compressed by the compressor to become a high-temperature and high-pressure gas refrigerant, sent to the indoor heat exchanger, and exchanges heat with the air blown to each room by the indoor heat exchanger to condense. With this heat of condensation, the air blown into each room becomes warm air, and each room is heated. After that, the refrigerant is throttled by the pressure reducer and sent to the heat recovery device. In the heat recovery unit, the refrigerant exchanges heat with the warm indoor air to exhaust,
A part of the gas-liquid mixture is evaporated, and the remaining refrigerant is sent to the outdoor heat exchanger. Thereafter, the outdoor heat exchanger exchanges heat with the outside air, evaporates, and returns to the compressor.

[0010] The ventilation unit is provided in the ventilation opening, and the heat recovery unit and the ventilation blower are integrally provided in the ventilation unit. Ventilation and heat recovery are performed simultaneously by blowing air. Further, a maintenance and inspection lid is provided so as to house the ventilation unit, and when the maintenance and inspection lid is closed, it forms a part of the house. When the maintenance and inspection lid is opened, maintenance and inspection of each component of the ventilation unit are facilitated. It is characterized in that it can be performed.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a basic configuration of an air conditioner according to the present invention. The air conditioner includes compressors 1a and 1b for compressing a refrigerant, outdoor heat exchangers 2a and 2b for exchanging heat between the outside air and the refrigerant, and an outdoor blower for blowing outside air to the respective outdoor heat exchangers 2a and 2b. 3a, 3b, heat exchangers 4a, 4b for exchanging heat between air and refrigerant discharged for indoor ventilation and reusing heat of the air, electric expansion valves, capillary tubes, and the like. Decompressors 5a, 5
b, indoor heat exchangers 6a and 6b for exchanging heat between air and a refrigerant blown to each room for air conditioning, and the indoor heat exchanger 6
indoor blowers 7a, 7 for blowing air harmoniously to a, 6b
b, having four-way switching valves 8a and 8b for switching the direction of circulation of the refrigerant during cooling and heating, and accumulators 9a and 9b, each constituting two independent refrigeration cycles (one for the first floor and one for the second floor). ing.

By switching the four-way switching valves 8a and 8b, during cooling, the refrigerant is compressed by the compressors 1a and 1b, the outdoor heat exchangers 2a and 2b, the heat recovery units 4a and 4b, and the decompressors 5a and 5b.
A cycle is formed by circulating the refrigerant in the order of the indoor heat exchangers 6a and 6b. During heating, the refrigerant is compressed by the compressors 1a and 1b, the indoor heat exchangers 6a and 6b, the decompressors 5a and 5b, and the heat recovery units 4a and 4
b, a cycle of circulating in the order of the outdoor heat exchangers 2a and 2b is formed.

The dotted and solid arrows shown along the pipe line in FIG. 1 correspond to the solid and dotted flow paths shown in the four-way switching valves 8a and 8b, respectively. The refrigerant circulates in the direction of the dotted arrow during heating.

When it is necessary to adjust the flow rate of the refrigerant flowing through the indoor heat exchangers 6a, 6b,
It is also possible to add a refrigerant flow control valve to 5b to have a refrigerant distribution function.

The compressors 1a and 1b change the gist of the present invention regardless of whether the operating capacity can be continuously varied, the operating capacity can be changed to a plurality of stages in a stepwise manner, or the operating capacity cannot be changed. Since it is not the one, it can be arbitrarily selected according to the installation of the air conditioner.

Furthermore, a strainer,
It is also possible to provide a muffler and the like, and the arrangement at that time can be a generally known arrangement, and is not shown.

The four-way switching valves 8a and 8b are preferably set to the same operation mode (cooling / heating), but there is no problem even if different operation modes are selected.

FIG. 2 is a conceptual diagram when the air conditioner having the above-described configuration is arranged in a house to form an air conditioning system for cooling and heating. The air for the first floor arranged on the floor side is shown in FIG. It consists of a conditioner and a second-floor air conditioner arranged on the ceiling side, and these configurations are the same except for the configuration of a suction chamber described later.

Each air conditioner has indoor units 10a, 10b,
Outdoor units 20a, 20b, ventilation unit 30, suction chambers 40a, 40b, branch chambers 50a, 50
b, blowing chambers 60a, 60b, and the like.

The indoor unit 10a on the floor side is disposed in a closed space such as below the stairs.
Acting as 0a.

As a result, it is not necessary to separately provide the suction chamber 40a, so that the manufacturing cost can be reduced.

In the present embodiment, the outside air and the room air flow into the suction chambers 40a and 40b at a constant ratio regardless of the time of cooling or heating. Is the suction chamber 40
What is necessary is just to provide a damper device etc. in a, 40b, etc.

The indoor units 10a and 10b include indoor heat exchangers 6a and 6b, decompressors 5a and 5b, and indoor blowers 7a and 7b.
And the like, and the outdoor units 20a and 20b include compressors 1a and 1b, outdoor heat exchangers 2a and 2b, outdoor blower 3
a, 3b, etc. are provided.

The ventilation unit 30 includes a heat recovery unit 4
a, 4b and a ventilation blower 31 for taking in and exhausting indoor air are provided in the exhaust duct 70.

The exhaust top 71 and the outside air inlet 80 of the exhaust duct 70 are covered with an insect repellent net (not shown) so that insects and the like do not enter the room.

FIG. 3 is a schematic configuration diagram when the ventilation unit 30 is installed in a house having a prescribed size such as a 2 × 4 house. The ventilation unit 30 has a housing 32, which is hung on a floor 35 a on the second floor by a suspension bolt 33, and a suction duct 34 a and a discharge duct 34.
b is connected.

The heat recovery unit 4 is provided inside the ventilation unit 30.
a, 4b and a ventilation blower 31 are provided, and a maintenance inspection lid 38 which is a part of the ceiling 35b is provided on the first floor ceiling 35b of the house.

A refrigerant pipe 36c is connected between the maintenance inspection lid 38 and the housing 32 via a pipe connection portion 36b to a refrigerant inlet / outlet 36a of the heat recovery units 4a and 4b. The refrigerant is circulated through 4b.

Further, a drain pipe 37c for discharging water due to dew condensation or the like from the heat recovery units 4a and 4b to the outside is connected to a drain port 37a via a drain connection part 37b.

When the maintenance and inspection cover 38 is closed, the maintenance and inspection cover 38 forms a part of the ceiling 35b on the first floor and the ventilation unit 30 becomes invisible from the outside. From 39, the entire housing 32 can be maintained and inspected, and the piping connection portion 36b and the drain connection portion 37b appear to perform maintenance and inspection.

With such a configuration, maintenance and inspection are easy even in a house such as a 2 × 4 house in which the dimensions such as the gap between the nips are fixed, and it is not necessary to secure a space for the maintenance.

Next, the air conditioning operation will be described. At the time of cooling, the refrigerant is switched by switching the four-way switching valves 8a and 8b as shown in FIG.
Of the compressors 1a, 1a
b, a cycle is formed in which the outdoor heat exchangers 2a and 2b, the heat recovery units 4a and 4b, the pressure reducers 5a and 5b, and the indoor heat exchangers 6a and 6b are sequentially circulated.

At this time, the outdoor heat exchangers 2a and 2b and the heat recovery units 4a and 4b act as condensers, and the indoor heat exchanger 6a
a and 6b function as evaporators.

That is, in the outdoor units 20a and 20b, the refrigerant is compressed by the compressors 1a and 1b to become a high-temperature and high-pressure gas refrigerant, which exchanges heat with the outside air in the outdoor heat exchangers 2a and 2b, and which is mostly liquefied. The refrigerant is sent to the ventilator 30 as a refrigerant in a liquid mixed state.

The refrigerant sent from the outdoor heat exchangers 2a and 2b to the ventilator 30 in this manner is supplied to the heat recovery units 4a and 4a.
In 4b, it is cooled by heat exchange with the room air to be ventilated and sent to the indoor units 10a and 10b.

The heat recovery units 4a and 4b are heat exchangers provided in the middle of the exhaust duct 70.
b is configured such that the room air to be ventilated is blown by the ventilation blower 31.

Therefore, the refrigerant from the outdoor units 20a and 20b exchanges heat with the cooled air exhausted for the ventilation, and the remaining gas refrigerant is liquefied. This increases the thermal efficiency of the cycle.

Then, the refrigerant is sent to the decompressors 5a and 5b, the flow rate of the refrigerant is reduced by the decompressors 5a and 5b, the pressure is reduced and evaporated by the indoor heat exchangers 6a and 6b, and the air blown to each room is blown. Heat exchange with

As a result, the air blown to each room becomes cool air, and is blown to each living room through the branch chambers 50a and 50b. Thereafter, the refrigerant returns to the outdoor units 20a and 20b, and the cycle goes through one cycle.

During heating, the four-way switching valves 8a, 8b
And the refrigerant is circulated in the direction of the dotted arrow shown in FIG. 1, whereby the compressors 1a, 1b, the indoor heat exchanger 6a,
6b, a cycle of sequentially circulating the pressure reducers 5a and 5b, the heat recovery devices 4a and 4b, and the outdoor heat exchangers 2a and 2b is formed.

At this time, the outdoor heat exchangers 2a and 2b and the heat recovery units 4a and 4b act as evaporators, and the indoor heat exchanger 6
a and 6b function as condensers.

That is, in the outdoor units 20a and 20b, the refrigerant is compressed by the compressors 1a and 1b to become a high-temperature and high-pressure gas refrigerant, and the indoor heat exchangers 6a and 6b of the indoor units 10a and 10b.
b.

The indoor heat exchangers 6a and 6b exchange heat with the air blown to each room, so that the air blown to each room is heated by the heat of the high-temperature refrigerant and turned into hot air, and the branch chamber 50a , 50b, the air is blown from each of the blowing chambers 60a, 60b to each of the living rooms.

On the other hand, the high-temperature refrigerant loses heat due to heat exchange, condenses, is throttled by the decompressors 5a, 5b, and sent to the heat recovery units 4a, 4b of the ventilator 30.

In the heat recovery units 4a and 4b of the ventilator 30, the refrigerant exchanges heat with the indoor air exhausted for ventilation, whereby a part of the refrigerant evaporates and the outdoor unit 20
Return to a and 20b. The refrigerant is supplied to the outdoor heat exchanger 2a,
By exchanging heat with the outside air in 2b, the remaining refrigerant evaporates and returns to the compressors 1a and 1b to make one cycle.

[0046]

The heat efficiency of the cycle can be improved by recovering the heat of the conditioned air exhausted by the heat recovery device.

Further, a maintenance inspection lid is provided below the ventilation unit, and a pipe connection portion and the like are provided between the maintenance inspection lid and the ventilation unit. Maintenance inspection can be easily performed even in a house having a fixed size. Therefore, it is not necessary to secure a space for maintenance and inspection separately.

[Brief description of the drawings]

FIG. 1 is a diagram showing a basic configuration of an air conditioner according to the present invention.

FIG. 2 is a schematic configuration diagram of an air conditioning system using the air conditioner of FIG.

FIG. 3 is a diagram showing an attached state of a ventilation unit having a maintenance inspection lid.

[Explanation of symbols]

 1a, 1b Compressor 2a, 2b Outdoor heat exchanger 3a, 3b Outdoor blower 4a, 4b Heat recovery unit 5a, 5b Decompressor 6a, 6b Indoor heat exchanger 7a, 7b Indoor blower 8a, 8b Four-way switching valve 10a, 10b Indoor unit 20a, 20b Outdoor unit 30 Ventilation unit 31 Ventilation blower 32 Housing 35b First floor ceiling 36b Pipe connection 37b Drain connection 38 Maintenance cover 39 Opening 40a, 40b Suction chamber 50a, 50b Branch chamber 60a, 60b Blow-out chamber 70 Exhaust port 80a, 80b Outside air intake

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigeo Desk 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Shintaro Sugimoto 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd.

Claims (1)

[Claims] 1. A compressor for compressing a refrigerant, an outdoor heat exchanger for exchanging heat between the refrigerant and the outside air, a decompressor, and an indoor heat exchange for exchanging heat between the refrigerant and air sent to the conditioned room. In an air conditioner equipped with a cooling cycle using an air conditioner, a ventilation blower that draws in and exhausts indoor air, and a heat blown by the air from the ventilation blower to recover heat of the air A recovery unit, a ventilation unit that integrally houses the ventilation blower and the heat recovery unit, and a maintenance inspection lid provided to house the ventilation unit. A ventilating / maintenance cover that allows maintenance and inspection of the ventilation unit when the cover is opened, and, when cooling, the refrigerant is supplied to the compressor, outdoor heat exchanger, heat recovery unit, decompressor, Circulate in the order of the indoor heat exchanger, and in heating The compressor, indoor heat exchanger, decompressor,
An air conditioner comprising: a four-way switching valve that circulates a heat recovery device and an outdoor heat exchanger in this order.