JPH0816565B2 - Air conditioner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner that heats a room by using a non-azeotropic mixed refrigerant.

[0002]

2. Description of the Related Art As an air conditioner in which a heat exchanger is built in a machine and the temperature of the air sucked in the machine is adjusted by the heat exchanger and sent out from the upper and lower air outlets of the machine body, for example, There is one such as the one disclosed in Japanese Laid-Open Patent Publication No. 55-53646.

In this conventional air conditioner, a heat exchanger having a refrigerant passage divided into a lower heat radiating portion and an upper heat radiating portion,
At the rear of the heat exchanger, two blowers arranged one above the other are housed. Then, the high temperature refrigerant sent from the compressor is made to flow from the lower heat radiating part to the upper heat radiating part, and the air sucked from the front of the airframe by the operation of the two air blowers is heated by the heat exchanger to be discharged from the upper and lower air outlets of the airframe. It is configured to be delivered.

[0004]

Even in the air conditioner having such a conventional structure, the temperature of the air heated by the heat exchanger is higher in the air passing through the lower radiating portion than in the air passing through the upper radiating portion. Although it can be heated, the temperature distribution of head cold foot heat can be expected when sending heated air from the top and bottom of the machine body, but since the refrigerant is simply flowing from the lower heat dissipation part to the upper heat dissipation part, the temperature difference between the upper and lower discharge air can be large. There were some drawbacks, such as not being able to obtain a stable temperature difference.

According to the present invention, the temperature of the temperature-controlled air sent from the air outlet below the airframe is made sufficiently higher than the temperature of the temperature-controlled air sent out from the air outlet above, and the temperature distribution of head cold foot heat in the room to be heated. It is intended to approach.

[0006]

DISCLOSURE OF THE INVENTION The present invention relates to an air conditioner in which indoor air sucked into a machine body is heat-exchanged by a heat exchanger and the air is sent out from upper and lower outlets of the machine body. The windward passage, the leeward passage, the inlet pipe connected to the lower portion of the windward passage, the connecting pipe connecting the upper portion of the windward passage and the lower portion of the leeward passage, and the upper portion of the leeward passage. A non-azeotropic mixed refrigerant compressed by a compressor is made to flow into the windward passage from the inlet pipe, and the refrigerant after being heat-exchanged by a heat exchanger is made to flow out from the outlet pipe. However, a refrigerant storage container is provided in the middle of the connection pipe such that its gas phase portion is connected to the connection pipe, and the liquid phase portion of the refrigerant storage container and the outlet pipe are connected by a bypass pipe.

[0007]

In the air conditioner in which the indoor air sucked into the machine is heat-exchanged by the heat exchanger and the air is sent out from the upper and lower outlets of the machine, the non-azeotropic mixed refrigerant compressed by the compressor is heat-exchanged. Flowing from the lower side to the upper side of the windward passage of the heat exchanger, separating the uncondensed gas refrigerant and the condensed liquid refrigerant in the refrigerant storage container, and this uncondensed gas refrigerant from the lower side of the leeward passage of the heat exchanger. It is designed to flow upward.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, (1) is a separation type air conditioner, which is an outdoor unit (a), an indoor unit (b), and inter-unit piping (2) connecting both units (a) and (b).
(3).

(4) is a compressor, (5) is a four-way valve, (6)
Is a first outdoor heat exchanger, (7) is a heating circuit, and one end (8)
Is connected to the first outdoor heat exchanger (6), and the other end (9) is connected to the upper portion of the outdoor refrigerant storage container (10). This heating circuit (7) is formed by connecting in parallel a heating capillary tube (11) through which a refrigerant passes during heating operation and a check valve (12) opened during cooling operation. (13)
Is a second outdoor heat exchanger, one end (14) is connected to the body of the outdoor refrigerant storage container (10), and the other end (15) is connected to the first capillary tube (16). A second capillary tube (17) is connected to the lower portion of the outdoor refrigerant storage container (10). This first capillary tube (16)
In addition, the second capillary tube (17) is connected to the inter-unit pipe (3). (18) is an outdoor blower,
The rotation of the blower causes the first outdoor heat exchanger (6) to be on the upwind side and the second outdoor heat exchanger (13) to be on the downwind side.

Reference numeral (19) is an indoor heat exchanger, and cross flow fans (20) and (21) are arranged above and below the heat exchanger, respectively, and the indoor air is supplied to the indoor unit (as indicated by the one-dot chain line arrow). It is designed so that it is sucked from the central portion of b) and discharged from above and below. The indoor heat exchanger (19) is provided with a windward passage (22), a leeward passage (22), and a leeward passage (23). The lower part (24) of the leeward passage (22) is connected to the four-way valve (5) via the inter-unit piping (2), and the upper part (25) of the leeward passage (23) is connected to the four-way valve (3) via the inter-unit piping (3). They are connected to the first and second capillary tubes (16) and (17), respectively. (26) is an indoor refrigerant storage container, which is the upper part (gas phase part) of this container (26).
An upper pipe (connection pipe) (27) extending from the middle pipe (connection pipe) (2) connected to an upper part (28) of the windward passage (22) and extending from an intermediate portion (gas phase portion) of the container (26).
9) is connected to the lower part (30) of the leeward passage (23). Also, the lower portion (liquid phase portion) of the indoor refrigerant storage container (26)
A lower pipe (bypass pipe) (31) extending from is connected to a refrigerant pipe (outlet pipe) 50 connected to the inter-unit pipe (3) via a check valve (32) that opens during heating.
Incidentally, (51) is a refrigerant pipe (inlet pipe) that connects the inter-unit pipe (2) and the lower portion (24).

The refrigerant used in the refrigeration cycle of this air conditioner is a non-azeotropic mixed refrigerant in which two refrigerants having different properties are mixed, for example, R-12 having a relatively high condensation temperature and a relatively low condensation temperature. It is a mixture with R-22.

During heating operation, the four-way valve (5) is set to the solid line state. The refrigerant exiting the compressor (4) flows in the direction of the solid arrow. That is, the refrigerant passing through the four-way valve (5) flows from the lower side to the upper side in the windward passage (22) of the indoor heat exchanger (19) via the inter-unit pipe (2). When the refrigerant passes through the windward passageway (22), the refrigerant exchanges heat with room air to liquefy R-12, which has a relatively high condensation temperature, and does not liquefy R-22, which has a relatively low condensation temperature, and maintains a gas state. Be drunk The refrigerant in the gas-liquid mixed state is separated by the indoor refrigerant storage container (26), and the gaseous refrigerant R-22 (33) is introduced into the leeward side passageway (23) through the middle pipe (29). Be freaked out. The gaseous refrigerant R-22 is passed through this passage (23).
Is liquefied by flowing from below to above. On the other hand, the liquid refrigerant R-12 (34) stored in the indoor refrigerant storage container (26) is merged with the liquid refrigerant R-22 described above through the check valve (32).

In this way, the gas refrigerant is made to flow from the lower side to the upper side in the two passages (22) and (23) of the indoor heat exchanger (19) so that the temperature below the indoor heat exchanger (19) becomes higher than the upper temperature. Is also high. Then, the temperature of the air blown from the lower side of the machine body is made higher than the temperature of the air blown from the upper side to heat the vicinity of the feet in the room with the high temperature air.

The refrigerant that has become liquid and flows out from the indoor unit (b) is sent to the outdoor unit (a) through the inter-unit pipe (3) and is fed to the first capillary tube (16) and the second capillary tube (17). Shunted to. First
The refrigerant flowing out of the capillary tube (16) is the second
After being subjected to the evaporation action in the outdoor heat exchanger (13), it is introduced into the outdoor refrigerant storage container (10). The outdoor refrigerant storage container (10) merges with the refrigerant from the second capillary tube (17) and is sent to the first outdoor heat exchanger (6) through the heating capillary tube (11). Then, it is returned to the compressor (4) through the four-way valve (5).

During the cooling operation, the four-way valve (5) is set to the broken line state. The refrigerant exiting the compressor (4) flows in the direction of the dashed arrow. That is, the refrigerant having passed through the four-way valve (5) flows into the outdoor first heat exchanger (6) and then flows into the outdoor refrigerant storage container (10) via the check valve (12). Then, the liquid refrigerant R-12 condensed in the first outdoor heat exchanger (6) accumulates at the bottom of the container and is sent to the second capillary tube (17). On the other hand, the gas refrigerant R-22, which is not condensed and is present in the upper part of the container (10), is sent to the second outdoor heat exchanger (13) and subjected to the condensation action, and then the first capillary tube (1).
6). Both capillary tubes (16) (1
The refrigerant flowing out from 7) is guided to the indoor unit (b) through the inter-unit pipe (3). In the indoor unit (b), the refrigerant is returned to the compressor (4) through the leeward passage (23), the indoor refrigerant storage container (26), the upwind passage (22) and the flow four-way valve (5).

[0016]

According to the present invention, the non-azeotropic mixed refrigerant compressed by the compressor is caused to flow from the lower side to the upper side of the windward passage of the heat exchanger, and the non-condensed gas refrigerant (refrigerant having a low condensation temperature) ) And condensed liquid refrigerant (refrigerant having a high condensation temperature) are separated so that uncondensed gas refrigerant flows from the lower side to the upper side of the leeward side passage. Therefore, the temperature below the heat exchanger is kept higher than the temperature above it, and the temperature of the air blown from below the heat exchange unit is made higher than the temperature of the air blown from above so that the temperature near the feet inside the room is high. It is possible to provide the air conditioner having the function of head cold foot heat by heating with the air. Moreover, since the uncondensed refrigerant is caused to flow into the leeward passage of the heat exchanger during heating, the refrigerant can be surely condensed.

[Brief description of drawings]

FIG. 1 is a refrigerant circuit diagram of an air conditioner according to an embodiment of the present invention.

[Brief description of reference numerals]

 19 Indoor heat exchanger 20, 21 Cross flow fan 22 Windward passage 23 Downwind passage 26 Indoor refrigerant storage container 31 Lower pipe (bypass pipe) 50 Refrigerant pipe (outlet pipe) 51 Refrigerant pipe (inlet pipe)

Claims (1)

[Claims] 1. An air conditioner in which indoor air sucked into an airframe is heat-exchanged by a heat exchanger and the air is sent out from upper and lower air outlets of the airframe, wherein the heat exchanger has a windward passage and a leeward wind. A side passage, an inlet pipe connected to a lower portion of the windward passage, a connecting pipe connecting an upper portion of the windward passage and a lower portion of the leeward passage, and an outlet pipe connected to an upper portion of the leeward passage are provided, and compression is provided. A non-azeotropic mixed refrigerant compressed by a machine is configured to flow into the windward passage from the inlet pipe and the refrigerant after heat exchange with a heat exchanger is configured to flow out from the outlet pipe, and in the middle of the connecting pipe. An air conditioner, wherein a refrigerant storage container is provided such that a gas phase portion thereof is connected to the connection pipe, and a liquid phase portion of the refrigerant storage container and the outlet pipe are connected by a bypass pipe.