JP5575083B2 - Air conditioner outdoor unit and air conditioner equipped with the outdoor unit - Google Patents

Description

  The present invention relates to an outdoor unit of an air conditioner and an air conditioner equipped with the outdoor unit, and more specifically, an outdoor unit of a multi-type air conditioner in which a plurality of indoor units are connected to one outdoor unit. It is about.

  In the air conditioner, the refrigerant in the refrigerant circuit is switched by a switching valve so that the outdoor heat exchanger provided in the outdoor unit functions as a condenser and the indoor heat exchanger provided in the indoor unit functions as an evaporator during cooling. The direction of circulation is switched. In addition, the refrigerant circuit is switched by the switching valve so that the outdoor heat exchanger functions as an evaporator and the indoor heat exchanger functions as a condenser during heating.

In the outdoor unit of such an air conditioner, a necessary amount of refrigerant is sealed in accordance with various operating conditions depending on outdoor temperature conditions and indoor set temperatures.
In a multi-type air conditioner in which a plurality of indoor units are connected to one outdoor unit, the outdoor unit is filled with refrigerant necessary when all the indoor units connected thereto are operated simultaneously. However, for example, when only one indoor unit is operated (changes in operating conditions), or when a large amount of excess refrigerant is generated due to changes in outdoor temperature, etc., it is provided in the refrigerant circuit. The excess refrigerant is temporarily stored in a container (hereinafter referred to as a refrigerant storage container).

6 is a refrigerant circuit diagram of a conventional air conditioner, FIG. 7 is a perspective view of an outdoor unit including the refrigerant circuit of FIG. 6 with a part omitted, and FIG. 8 is a front view and a BB cross-sectional view of FIG. is there.
In the figure, an outdoor unit body 2 constituting the outdoor unit 1 is partitioned into a machine room 4 and a blower room 5 by a partition plate 3, and the machine room 4 is provided on the discharge side of the compressor 6 and the compressor 6. The four-way valve 7, the expansion valve 8, the electrical product 9, the refrigerant storage container 30 a and the like are installed. The four-way valve 7 is connected to an outdoor heat exchanger 10 to be described later by a gas refrigerant pipe 13, and is connected to the suction side of the compressor 6 through a refrigerant storage container 30a by a gas refrigerant pipe 13a.

  10 is an L-shaped outdoor heat exchanger installed from the back side of the machine room 4 to the back and side surfaces of the blower room 5, and 11 is installed in the blower room 5 and driven by a motor (not shown). A blower for sending outside air to the heat exchanger 10.

  Reference numeral 14 denotes an indoor unit connection port that includes a liquid refrigerant port 15 and a gas refrigerant port 16 and is provided on a side surface of the machine room 4. The liquid refrigerant port 15 is connected to the outdoor heat exchanger 10 through the liquid refrigerant storage container 30a and the expansion valve 8 through the liquid refrigerant pipe 12, and the gas refrigerant port 16 is connected to the four-way valve 7 through the gas refrigerant pipe 13b. It is connected.

  In the liquid refrigerant port 15, 17 a to 17 n are liquid refrigerant pipes provided corresponding to indoor units 40 a to 40 n installed in each room described later, and expansion valves 18 a to 18 n are provided, respectively. In the gas refrigerant port 16, 19a to 19n are gas refrigerant pipes provided corresponding to the indoor units 40a to 40n installed in the respective rooms.

  Reference numerals 40a to 40n denote indoor units having indoor heat exchangers provided in the A chamber, the B chamber, and the N chamber, respectively, and the liquid refrigerant in the liquid refrigerant port 15 is formed by the liquid refrigerant pipes 41a to 41n and the gas refrigerant pipes 42a to 42n. The pipes 17 a to 17 n and the gas refrigerant pipes 19 a to 19 n of the gas refrigerant port 16 are respectively connected.

Thus, in the multi-type air conditioner in which a plurality of indoor units 40a to 40n are connected to one outdoor unit 1, the refrigerant storage container 30a is installed in the machine room 4 of the outdoor unit 1 and is expanded. It is connected between the outdoor heat exchanger 10 and the liquid refrigerant port 15 via the valve 8 (prior art 1).
In addition, there is a type in which such a refrigerant storage container (receiver) is inclined and installed between two fans arranged side by side in the blower chamber (see, for example, Patent Document 1).

JP 2002-22319 A (page 3-4, FIG. 2)

  In a multi-type air conditioner in which a plurality of indoor units 40a to 40n are connected to a single outdoor unit 1 of the prior art 1, since there is a large amount of excess refrigerant due to differences in operating conditions, the capacity of the refrigerant storage container 30a is large. As a result, a large space is required in the machine room 4, and as a result, the outdoor unit 1 itself becomes large.

  Further, according to the refrigeration cycle apparatus of Patent Document 1, an increase in the space of the machine room can be avoided, but a receiver in which the heat-exchanged refrigerant is stored is installed between the fans in the blower room and comes into contact with the outside air. Therefore, since the heat exchanged refrigerant in the receiver is further heat exchanged to cause heat loss, the efficiency of the refrigeration cycle is reduced.

  The present invention has been made in order to solve the above-described problems, and a large-capacity refrigerant storage container can be installed without increasing the size, and in addition, the efficiency of the refrigeration cycle due to heat loss does not decrease. An object of the present invention is to provide an outdoor unit and an air conditioner including the outdoor unit.

The present invention, the compressor is installed machine room, blower installed a blower chamber, feeding the outdoor heat exchanger provided in Kazekishitsu, containers for storing surplus refrigerant, and the chamber component connection port setting vignetting a outdoor unit number indoor units double is connected, the container, constituted by a high-pressure refrigerant reservoir and the low pressure refrigerant storage container, the high-pressure refrigerant storage container to said blower chamber covered with a heat insulating material The low-pressure refrigerant storage container is installed in the machine room.

  Moreover, the air conditioner which concerns on this invention connects several indoor units to said outdoor unit via the indoor unit connection port.

According to the present invention, a container for storing excess refrigerant is constituted by a high-pressure refrigerant storage container and a low-pressure refrigerant storage container, one of which is covered with a heat insulating material and installed in the blower room, and the other is installed in the machine room. Since it did in this way, a large capacity | capacitance refrigerant | coolant storage container can be obtained, without enlarging an outdoor unit.
Also, since either the high-pressure refrigerant storage container or the low-pressure refrigerant storage container is covered with a heat insulating material and installed in the blower chamber, there can be obtained a refrigerant storage container that has no heat loss and does not reduce the efficiency of the refrigeration cycle. .

It is a refrigerant circuit figure of the outdoor unit concerning one embodiment of the present invention. It is a perspective view of the outdoor unit provided with the refrigerant circuit of FIG. It is the front view of FIG. 2, and its AA sectional drawing. FIG. 3 is an exploded perspective view of FIG. 2. It is sectional drawing of the heat insulation box which accommodated the high pressure refrigerant | coolant storage container. It is a refrigerant circuit diagram of the conventional air conditioner. It is the perspective view which abbreviate | omitted a part of outdoor unit provided with the refrigerant circuit of FIG. It is the front view of FIG. 7, and its BB sectional drawing.

  1 is a refrigerant circuit diagram of an outdoor unit according to an embodiment of the present invention, FIG. 2 is a perspective view of the outdoor unit including the refrigerant circuit of FIG. 1, and FIG. 3 is a front view of FIG. FIG. 4 is an exploded perspective view of FIG. 2, and FIG. 5 is a cross-sectional view of a heat insulating box housing a high-pressure refrigerant storage container. In addition, the same code | symbol is attached | subjected to the part of the same or same function as the prior art of FIGS.

  In the present embodiment, a container for storing surplus refrigerant is constituted by a high-pressure refrigerant storage container 30 and a low-pressure refrigerant storage container 31. For example, the high-pressure refrigerant storage container 30 is accommodated in the heat insulation box 32 and installed in the blower chamber 5, and the refrigerant pipe 12 is connected between the outdoor heat exchanger 10 and the liquid refrigerant port 15 via the expansion valve 8. And a low-pressure refrigerant storage container 31 is installed in the machine room 4 and connected between the compressor 6 and the four-way valve 7 by a gas refrigerant pipe 13a.

  As shown in FIGS. 4 and 5, the heat insulating box 32 in which the high-pressure refrigerant storage container 30 is accommodated has a box-shaped heat insulating lower case 33 a whose inner wall is formed by a heat insulating material 34 and whose upper surface is opened, and whose lower surface is A high-pressure refrigerant storage container 30 connected to the liquid refrigerant pipe 12 is accommodated between the upper and lower heat insulation cases 33a and 33b and installed on the bottom plate 20 of the blower chamber 5. Then, it is fixed to the fixing plate 21 provided on the back side, and the front and top surfaces are covered with the upper lid 35. The upper lid 35 may be omitted.

Next, the operation (driving operation) of the present embodiment configured as described above will be described. In addition, in the following description, the case where only A room is air-conditioned among several rooms A room-n room of FIG. 6 is demonstrated.
First, in the case of the cooling operation, the four-way valve 7 is connected to the compressor 6 and the outdoor heat exchanger 10 by the gas refrigerant pipe 13, and the gas refrigerant port 16 and the low-pressure refrigerant storage container 31 are connected by the gas refrigerant pipes 13a and 13b. And switch to connect. Moreover, the expansion valve 18a provided in the liquid refrigerant piping 17a of the liquid refrigerant port 15 connected to the indoor unit 40a of the A room is opened, and the other expansion valves are closed.

  When the compressor 6 is driven in the state as described above, the high-temperature and high-pressure gas refrigerant is discharged from the compressor 6 and flows into the outdoor heat exchanger 10 through the four-way valve 7 and the gas refrigerant pipe 13, and the ambient outside air It is condensed and liquefied by heat exchange with it, and becomes a high-pressure and low-temperature liquid refrigerant.

  The high-pressure and low-temperature liquid refrigerant that has flowed out of the outdoor heat exchanger 10 flows into the liquid refrigerant pipe 12, is decompressed by the expansion valve 8, and is stored in the high-pressure refrigerant storage container 30. The required amount of liquid refrigerant flows into the indoor unit 40a (see FIG. 6) via the liquid refrigerant pipe 17a, the expansion valve 18a, and the liquid refrigerant pipe 41a of the liquid refrigerant port 15, and becomes a gas-liquid two-phase refrigerant. The exchanger exchanges heat with room air, evaporates and vaporizes, and cools room A.

  The gas refrigerant flowing out from the indoor heat exchanger flows into the gas refrigerant pipe 42a, the gas refrigerant pipe 19a of the gas refrigerant port 16, and passes through the gas refrigerant pipe 13b, the four-way valve 7, and the gas refrigerant pipe 13a to the low-pressure refrigerant storage container 31. It flows in and flows into the compressor 6 through the gas refrigerant pipe 13a. At this time, the liquid contained in the gas refrigerant is separated and stored in the low-pressure refrigerant storage container 31.

  In the case of heating operation, the compressor 6 and the gas refrigerant port 16 are connected by the four-way valve 7, and the outdoor heat exchanger 10 and the low-pressure refrigerant storage container 31 are connected. When the compressor 6 is driven, high-pressure and high-temperature gas refrigerant is discharged from the compressor 6 and passes through the gas refrigerant pipe 19a of the gas refrigerant port 16 from the four-way valve 7 to the indoor heat exchange of the indoor unit 40a from the gas refrigerant pipe 42a. It flows into the chamber, heats and exchanges with the surrounding room temperature, condenses and liquefies, and heats the A room.

  The refrigerant flowing out of the indoor heat exchanger flows into the expansion valve 18a from the liquid refrigerant pipe 17a of the liquid refrigerant port 15 through the liquid refrigerant pipe 41a, and flows into the liquid refrigerant pipe 12 in a low-pressure two-phase state or a liquid phase state. Then, it flows into the outdoor heat exchanger 10 through the high-pressure refrigerant storage container 30 and the expansion valve 8. Then, heat is exchanged with the surrounding outside air to evaporate and vaporize to become a gas refrigerant, which flows into the low-pressure refrigerant storage container 31 through the gas refrigerant pipe 13, the four-way valve 7, and the gas refrigerant pipe 13a, and then through the gas refrigerant pipe 13a. It is sucked into the compressor 6. At this time, the liquid contained in the gas refrigerant is separated and stored in the low-pressure refrigerant storage container 31.

  In the multi-type air conditioner that performs the cooling operation or the heating operation as described above, the refrigerant necessary for the multi-operation is sealed in the outdoor unit 1, but for example, one of the indoor units 40a to 40n When only the indoor unit (for example, 40a) is operated, a large amount of excess refrigerant is generated. Such excess refrigerant is normally stored in the high-pressure refrigerant storage container 30, and excess refrigerant generated due to a change in outdoor temperature conditions or a difference in set temperature is stored in the low-pressure refrigerant storage container 31.

  In the present embodiment, the conventional container for storing the surplus refrigerant is composed of two units, a high-pressure refrigerant storage container 30 and a low-pressure refrigerant storage container 31, and the high-pressure refrigerant storage container 30 is placed in the heat insulating box 32. Since it is housed and installed in the blower chamber 5 in a wide space and the low-pressure refrigerant storage container 31 is installed in the machine room 4, a large-capacity high-pressure refrigerant storage container 30 can be provided. Therefore, the space of the machine room 4 is not enlarged, and therefore the outdoor unit 1 is not enlarged.

  Further, since the high-pressure refrigerant storage container 30 is accommodated in the heat insulating box 32 and installed in the blower chamber 5, the high-pressure refrigerant storage container 30 is cut off from the outside air (indicated by arrows in FIGS. 4 and 5) blown by the operation of the blower 11. Therefore, the cycle efficiency does not decrease due to heat loss, and the surplus refrigerant can be stored efficiently.

In the above description, the case where the high-pressure refrigerant storage container 30 accommodated in the heat insulation box 32 is installed in the blower chamber 5 and the low-pressure refrigerant storage container 31 is installed in the machine room 4 is shown. It may be housed in the box 32 and installed in the blower chamber 5, and the high-pressure refrigerant storage container 30 may be installed in the machine chamber 4.
Moreover, the heat insulation box which accommodates a high pressure refrigerant | coolant storage container or a low pressure refrigerant | coolant storage container is not limited to the thing of illustration, What is necessary is just to interrupt | block the external air ventilated by the driving | operation of the air blower 11. FIG.

  DESCRIPTION OF SYMBOLS 1 Outdoor unit, 2 Outdoor unit main body, 4 Machine room, 5 Blower room, 6 Compressor, 7 Four way valve, 8, 18a-18n Expansion valve, 10 Outdoor heat exchanger, 11 Blower, 12, 17a-17n, 41a 41n liquid refrigerant piping, 13, 13a, 13b, 19a-19n, 42a-42n gas refrigerant piping, 14 indoor unit connection ports, 15 liquid refrigerant ports, 16 gas refrigerant ports, 20 bottom plate, 21 fixing plate, 22 front panel, 30 High pressure refrigerant storage container, 31 Low pressure refrigerant storage container, 32 Heat insulation box, 33a Heat insulation lower case, 33b Heat insulation upper case, 34 Heat insulation material, 35 Upper lid, 40a-40n Indoor unit.

Claims (4)

Compressor is installed machine room, blower installed a blower chamber, feeding the outdoor heat exchanger provided in Kazekishitsu, storing the surplus refrigerant container, and the chamber component connection port setting vignetting allows several An outdoor unit to which an indoor unit is connected,
That said container is constituted by the high-pressure refrigerant reservoir and the low pressure refrigerant storage container, the installed in the fan chamber to the high-pressure refrigerant storage container covered with a heat insulating material, and placing the low-pressure refrigerant storage container to the machine room An air conditioner outdoor unit characterized by The high-pressure refrigerant storage container is accommodated in a heat insulating box, connected to the outdoor heat exchanger via an expansion valve by liquid refrigerant piping and connected to the liquid refrigerant port,
Outdoor unit of an air conditioner according to claim 1, characterized in that connected to the compressor and the four-way valve the low pressure refrigerant storage container by gas refrigerant pipe. Wherein the insulation box body, the inner wall is constituted by a thermally insulating lower case and the heat insulating upper case formed of a heat insulating material, housing a high-pressure refrigerant storage container or pressure refrigerant reservoir between the heat insulating lower case and the heat insulation on the case The outdoor unit for an air conditioner according to claim 2, wherein the outdoor unit is an air conditioner.   A plurality of indoor units are connected to the outdoor unit according to any one of claims 1 to 3 through the indoor unit connection port.

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