JPH0448138A - Air conditioner - Google Patents

Abstract

PURPOSE:To reduce the amount of air flow against a user and make a comfortable feeling for air by a method wherein at least one of a plurality of user's devices is of a circulation type device for use in blowing cold or hot air and the other user's device is of a radiation type device and both of them are installed in the same room. CONSTITUTION:When an interior part 28 and a perimeter part 26 are cooled concurrent ly, refrigerant is gasified by utilizer's side heat exchangers 7a, 7b and 7c under an operation of each of changing-over valves. Cold air is blown from utilizer's side devices 6a and 6b into a room 29 and at the same time, the interior part is cooled by the radiation panels 23, 24 and 25 cooled by the cooling water. When a heating operation is concurrently carried out, hot air is blown from the utilizer's side devices 6a and 6b under an operation of each of the changing-over valves and then the interior part 29 is heated by the radiation panels 23, 24 and 25. With such an arrangement, it is possible to reduce an amount of air blown from the utilizer's side devices 6a and 6b and the air is comfortable for the user. Hot air is blown from the devices 6a and 6b and the cooling operation can be carried out with the radiation panels 23, 24 and 25 or the heating operation can be carried out with the radiation panels 23, 24 and 25.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to an air conditioner that cools and heats a room using a plurality of user-side units.

<Explanation> A heat source side unit having a conventional technology compressor and a heat source side heat exchanger;
A plurality of user-side units each having a user-side heat exchanger and a refrigerant pressure reducer are connected by inter-unit piping consisting of a high-pressure gas pipe, a low-pressure gas pipe, and a liquid pipe, while the heat source-side heat exchanger and the user-side heat A multi-room type that is equipped with a switching valve to individually operate the exchanger as a condenser or evaporator, cools or heats all of multiple rooms at the same time, and cools any room and heats other rooms at the same time. The air conditioner of
It has been presented in Publication No. 0833.

(c) Problems to be Solved by the Invention In the air conditioner described above, the user-side unit exchanges heat with the user-side heat exchanger and blows out indoor air.
Since it is a so-called circulation type unit, it has disadvantages in that a large amount of air is circulated indoors, a large amount of air hits the user in the room, and the air blowing noise is loud, making it uncomfortable.

The present invention provides an air conditioner that allows less air to hit the user and provides comfort.

(d) Means for Solving the Problems This invention provides a heat source side unit incorporating a compressor and a heat source side heat exchanger, a plurality of usage side units incorporating usage side heat exchangers, and an interface between the two units. Inter-unit piping consisting of a high-pressure gas pipe, a low-pressure gas pipe, and a liquid pipe provided in the In an air conditioner equipped with a switching valve for switching a refrigerant flow path to act as a refrigerant flow chamber, at least one of the plurality of user units is a circulation type unit that blows out cold and hot air. At the same time, the other user-side unit is a radiant unit that emits radiant heat, and this radiant unit and the circulation unit are placed in the same room.

(E) Function In this air conditioner, when cooling the room, the switching valve of the heat exchanger on the user side and the switching valve on the heat source side heat exchanger are set to the cooling state, so that the circulation unit can cool air. As it blows into the room, the radiant unit cools the indoor air near the unit.

In addition, when heating the room, by setting the switching valve of the user-side heat exchanger and the switching valve of the heat source-side heat exchanger to the heating state, the circulation unit blows warm air into the room, and
Radiant units emit radiant heat.

In addition, when heating a room with a circulation type unit and cooling a part of the room with a radiant unit, set the switching valve of the heat exchanger on the user side of the circulation type unit to the heating state, and By setting the switching valve of the heat exchanger to the cooling state, the circulation type unit blows warm air into the room, and the radiation type unit cools the indoor air in the vicinity of the unit.

Furthermore, when cooling a room with a circulation type unit and heating a part of the room with a radiant unit, set the switching valve of the user-side heat exchanger in the circulation type unit to the cooling state, and By setting the switching valve of the side heat exchanger to the heating state, the circulation type unit blows out cold air, and the radiant type unit emits radiant heat.

(F) Embodiment A first embodiment of the present invention will be explained based on FIGS. 1 and 2. FIG. 1 is a refrigerant circuit diagram of the air conditioner, and FIG. 2 is an explanatory diagram showing the arrangement of the air conditioner.

In these figures, (1) is a heat source side unit having a compressor (2), a heat source side heat exchanger (3), a gas-liquid separator (4), and an air blower (5), (6a) (6b) ( 6c) is a user side unit having user side heat exchangers (7a), (7b), and (7c), in which the heat source side heat exchanger (3) is connected to the refrigerant discharge pipe (9) of the compressor (2) and the refrigerant suction pipe ( 10) Switching valve <1la
) (llb), while connecting the inter-unit piping (12) connecting the heat source side unit (1) and the usage side unit (6a) (6b) (6c) to the refrigerant discharge pipe (9).
A high-pressure gas pipe (13) branch-connected to the refrigerant suction pipe (
It consists of a low pressure gas pipe (14) which is branch-connected to the heat source side heat exchanger (3), and a liquid pipe (15) connected to the heat source side heat exchanger (3), and one end of the high pressure gas pipe (13) is connected to the capillary tube (
16) to the low pressure gas pipe (14), while the user side heat exchangers (7a) (7b) (7c) are connected to the high pressure gas pipe (14) via the high pressure gas pipe (16).
13) and the low pressure gas pipe (14) are each equipped with a switching valve (17a).
) (18a) , (17b) (18b) , (17
c) Branch connection via (18c) and liquid pipe (15
) has a refrigerant pressure reducer such as an electric expansion valve <30a) <30b
)<30c).

(19) is an auxiliary refrigerant pressure reducer such as an electric expansion valve interposed in the liquid pipe (15).

And, the user side unit (6c) is connected to Mizuguchiro (20),
A heat exchanger (7c) thermally connected to the heat exchanger (21) of the water circuit (20) and a refrigerant pressure reducer (30) constitute a radiation type unit. In addition, the water circuit (20
) is composed of a heat exchanger (21), a circulation pump (22), and radiant panels (23) (24) (25). still,
Radiant panel 23〉 is placed on the floor of the beam meter part (26), and the radiant panel (24〉 is placed on the floor of the beam meter part (26)
The radiant panel <25> is placed on the ceiling of the meter part (26>).The usage side units (6a) (6b) are located in the interior part (28) on the hallway (63) side. The air blower (3
1a) (31b) are provided and configured as a circulating unit. Then, the user unit (6a) (6b
) (6c) are all arranged in one chamber (29).

Next, the driving operation will be explained. When cooling the interior portion (28) and the perimeter portion (26) at the same time, open one switching valve (lla) of the heat source side heat exchanger (3) and close the other switching valve (llb). One switching valve (17a) of the side heat exchanger (7a) (7b) (7c)
(17b) and (17c) and close the other switching valve (17c).
By opening 8a) (18b) and (18c), the refrigerant completely discharged from the compressor (2) is discharged through the discharge pipe (9) and the switching valve (l).
la), flows sequentially to the heat source side heat exchanger (3), where it condenses and liquefies, and then passes through the liquid pipe (15) to the user side unit (6).
a) (6b) (6c) Refrigerant pressure reducer (30a) (30b
) (30c), where it is depressurized. After that,
After the refrigerant evaporates and vaporizes in each user-side heat exchanger (7a) (7b) (7c), the refrigerant passes through the switching valves (18a) (18b) (1), respectively.
8c), the low-pressure gas pipe (14), the suction pipe (10), and the gas-liquid separator (4) in order before being sucked into the compressor (2). Moreover, at this time, the blower (31a) (31b) (5) and the circulation pump (22) are being operated.

When the air conditioner is controlled in this way, cold air is blown into the room (29) from the user units (6a) (6b), and the radiant panel (23) is cooled by the cooling water.
By (24) and (25), the indoor air is completely cooled, and the room is cooled.

On the contrary, the interior part (28) and the perimeter part (26
) at the same time, close one switching valve (lla) of the heat source side heat exchanger (3) and close the other switching valve (lla).
lb), and open the user-side heat exchanger (6a) (6
b) One switching valve (17a) (17b) of (6C)
(17c) and open the other switching valve (18a) (18
b) By closing (18c), the refrigerant discharged from the compressor (2) is transferred to the discharge pipe 9), the high pressure gas pipe (13),
The refrigerant flows sequentially through the switching valves (17a) (17b) (17c) and the user-side heat exchangers (7a) (7b) (7c), where it condenses and liquefies, and then flows through the refrigerant pressure reducer (30a) (30b) (30c).
) is depressurized. After that, the refrigerant passes through the liquid pipe <15), the auxiliary refrigerant pressure reducer (19), evaporates and vaporizes in the heat source side heat exchanger (3), and then passes through the switching valve (llb), the suction pipe (10), and the air The liquid passes through the liquid separator (4) in order and can be sucked into the compressor (2).

When the air conditioner is controlled in this way, warm air is blown out from the user units (6a) (6b) into the room (29), and the radiant panels (23) (24) are installed in the room (29).
Radiant heat is emitted from (25) to heat the inside of the room (29).

As explained above, when the room 29) is cooled or heated with this air conditioner, the radiant panels (23) (24) (25) of the user side unit (radiant unit) (6c)
) cools and heats the room (29〉), so the user side unit [
Circulation type unit) (6a) The amount of temperature-controlled air blown out from (6b) can be reduced, and the user feels only a slight flow of air, which is comfortable for the user.

In addition, the load on the perimeter part (26) is different from the load on the interior part (28), and it is easily affected by outside air and sunlight, so the perimeter part (26) and the interior part (28)
) The heating and cooling load may be reversed. For example, there is a room (29) in which office equipment, which requires air conditioning throughout the year, is placed in the perimeter area 26) during the winter season. Interior part (28
), and the user unit (6C) cools the perimeter area (26) [However, the sum of the capacities of the user units (6a) and (6b) is the user unit t-
(6c)] is the heat source side heat exchanger (3
) closes one switching valve (lla) and opens the other switching valve (llb), and closes one switching valve (lla) of the heat exchanger (7a) (
7b) (7c) One of the switching valves (17a) (17b) (
18c) and open the other switching valve (18a) (18b).
) (17c), the refrigerant discharged from the compressor (2) is condensed and liquefied in the user-side heat exchanger (7a) (7b), and then transferred to the user-side heat exchanger (7C) and the heat source side. After being evaporated and vaporized in the heat exchanger (3), it is sucked into the compressor (2).

When the air conditioner is fully controlled in this way, warm air is blown from the user side units (6a) (6b) to the interior part (28) in the room (29), heating the interior part (28), and Perimeter part in room <29> (2
6) are cooled by radiant panels (23), (24), and (25).

In addition, when the user side unit (6a) (6b) cools the interior section 28) and the user side unit (6C) heats the perimeter section (26), the heat source side heat exchanger (3) One switching valve (lla) is opened and the other switching valve (llb) is closed, and one switching valve (17a) (
17b) (18c) and close the other switching valve (18c).
a) By opening (18b) and (17c), the refrigerant discharged from the compressor (2) is transferred to the user side heat exchanger (7C).
After being condensed and liquefied in the heat source side heat exchanger (3), it is evaporated and vaporized in the utilization side heat exchanger (7g) (7b), and then sucked into the compressor (2).

When the air conditioner is controlled in this way, cold air is blown from the user side unit (6a) (6b) to the interior part 28) in the room (29), and the interior part 28) is cooled. Radiant panel (23) (24) (25
) is emitted to the perimeter section (26) in the room (29), heating the perimeter section (26).

As explained above, even if the heating and cooling loads of one part of the room (28) are reversed, this air conditioner can perform heating and cooling according to the load.
It is very comfortable for the user inside.

Moreover, during simultaneous heating and cooling operation, the respective user-side heat exchangers (7a) (7b) (7c) act as evaporators and condensers.
), heat is recovered and operational efficiency can be improved.

FIG. 3 is a refrigerant circuit diagram showing the main parts of the second embodiment of the present invention, in which the user unit (61c) has radiant panels (41), (44), and 47) but
A switching valve (40
)(42)(43)(45)(46)(48) are provided. In the air conditioner configured in this way, when the user side unit (61c) cools the air conditioner, the switching valve (43)
(45) (46>(4B) is opened and the switching valve (40)
By closing (42), the interior of the room (29) can be completely cooled by the radiant panels (44) and (47) near the walls and ceiling.

In addition, when heating with the user side unit (61c), the switching valves (40) (42) are opened, and the switching valves (43) (4) are opened.
5) When (46) and (48) are closed, the radiant panel <41) emits radiant heat to the low temperature indoor air near the floor.

When the air conditioner is fully operational in this way, the room (29) is cooled from the ceiling side, and the room (29) is cooled from the foot side.
can be heated completely, making it more comfortable for the user.

Also, if the air conditioner is cooled from the ceiling and heated from the feet,
The interior of the room (29) can be cooled or heated more uniformly, which is very comfortable for the user.

FIG. 4 shows the main refrigerant circuit of the third embodiment, and in this figure, the user unit (radiation type unit)
c) is provided with a radiation panel (49) containing a user-side heat exchanger (7c) and a refrigerant pressure reducer (30c). In this air conditioner, the refrigerant is used directly for heating and cooling without intervening a water circuit or the like, and heat loss can be suppressed to a small level, so that the efficiency of heating and cooling is high.

(G) As described in detail, according to this invention, within the same room,
Since heating and cooling is performed using cold and hot air from the circulating unit and radiant heat from the radiant unit, the amount of circulating air is small and the amount of air hitting the user is small, making it comfortable for the indoor user.

Moreover, since the convection type unit and the radiation type unit can be individually cooled and heated, they can be individually cooled and heated at different locations in the room depending on the load, making it very comfortable for the user.

[Brief explanation of the drawing]

Fig. 1 is a refrigerant circuit diagram showing a first embodiment of the air conditioner according to the present invention, Fig. 2 is an explanatory diagram showing the arrangement of the air conditioner, and Fig. 3 is a second embodiment of the air conditioner. FIG. 4 is a refrigerant circuit diagram showing the main parts of the third embodiment of the same air conditioner. (1)...Heat source side unit, (2)...Compressor,
(3)...user side heat exchanger, (6a)(6b)・
・・User side unit [convection type unit], (6c)・
・・User side unit [radiation type unit], (7g) (
7b) (7c) - User-side heat exchanger, <12)... Inter-unit piping, (13)... High pressure gas pipe, (14)
)...Low pressure gas pipe, (15)...Liquid pipe, (17a
) (18a) (17b) (18b) (17c) (18c
)-switching valve, (29)...chamber, (61c)...
User side unit [radiation type unit], (62c)...
・User side unit [radiation type unit].

Claims (1)

[Claims] (1) A heat source side unit incorporating a compressor and a heat source side heat exchanger, a plurality of user side units incorporating a user side heat exchanger, and a high pressure gas pipe and a low pressure gas pipe provided between the two units. Inter-unit piping consisting of liquid pipes, and a refrigerant flow path switch installed in these high-pressure gas pipes and low-pressure gas pipes to make the heat source side heat exchanger and each user side heat exchanger function as a condenser or an evaporator. In an air conditioner equipped with a switching valve, at least one of the plurality of user units is a circulation type unit that blows out cold and hot air, and radiant heat is emitted from the other user units. An air conditioner characterized in that the radiation type unit and the circulation type unit are arranged in the same room.