JP2001248938A - Separate air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dissolve the defects of a conventional air conditioner that it is low in dehumidifying capacity and that the unit used exclusively for dehumidification heats the interior of a room. SOLUTION: In a separate air conditioner which is separated into an outdoor unit and an indoor unit, the outdoor unit 1 is equipped with a compressor 3 and a heat exchanger 4 for heat radiation, and the indoor unit 2 is equipped with a heat exchanger 5 for heat radiation, a refrigerant tank 6, a pressure reducing device 7, and a heat exchanger 8 for dehumidification, and the heat exchanger 4 for heat radiation in the outdoor unit 1 and the heat exchanger 5 for heat radiation in the indoor unit 2 are connected with each other by pipe 9, and the above compressor 3 and the heat exchanger 8 for dehumidification are connected with each other by other pipe 10, and a refrigerant circulates between the outdoor unit 1 and the indoor unit 2, and indoor air passes the heat exchanger 5 for heat radiation after being dehumidified, passing through the above heat exchanger 8 for dehumidification.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separation type air conditioner capable of adjusting indoor humidity and temperature to desired conditions.

[0002]

2. Description of the Related Art There have been air conditioners and dehumidifiers for indoor dehumidification and temperature control.
Used in buildings, factories and others.

[0003]

Some conventional air conditioners are provided with a dehumidifying function, but these are mainly intended to maintain the indoor air temperature at a predetermined temperature, and have a sufficient humidity. It cannot be adjusted. For this reason, dew condensation may occur despite the operation of the air conditioner. In particular, since the suction pressure of a compressor (compressor) for refrigerant compression has increased in air conditioners that have responded to recent energy savings, the dew point temperature of the heat exchanger in indoor units has increased, and the dehumidification capacity has decreased. Necessary dehumidification is not sufficiently performed, and the room becomes humid and low temperature, and becomes the same state as during the rainy season, resulting in an uncomfortable indoor environment.

In order to sufficiently control not only the air temperature but also the humidity, a specially designed dehumidifier is required, which is expensive. In addition, the conventional dehumidifier is an integral type, and as shown in FIG. 2, a compressor B, a heat-dissipating heat exchanger C, a decompression device D, and a dehumidifying heat exchanger E are built in a dehumidifier body A. They are connected in series and annular by a pipe F so that the refrigerant circulates, and the air is applied to the dehumidifying heat exchanger E cooled by the heat of vaporization of the refrigerant to cool and dehumidify the air.

[0005] Conventional dehumidifiers are of the household type, floor-standing type, direct-blown type, and integrated type, and therefore have the following problems. 1. The room temperature rises due to the heat generated from the compressor and the like. Especially during cooling, this heat requires a lot of energy for cooling. 2. Since it is for home use, its dehumidification capacity is small, making it unsuitable for use in buildings and large-scale air conditioning. 3. Since it is a floor-standing type, there is no need to consider the installation of a dehumidifier when designing a building, and it will be installed indoors after construction, taking up space and easily becoming an obstacle. 4. Since it is a direct blow type, it must be installed in an air-conditioned room, and there are restrictions on the installation location. 5. Since it is an integrated type for indoor installation, heat generated at the time of dehumidification is exhausted indoors, and the indoor temperature rises.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a separated type air conditioner which is separated into an outdoor unit and an indoor unit. It is to provide a separation type air conditioner.

A first separation type air conditioner of the present application is a separation air conditioner separated into an outdoor unit 1 and an indoor unit 2, wherein the outdoor unit 1 includes a compressor 3 and a heat exchanger 4 for heat radiation. The unit 2 includes a heat-radiating heat exchanger 5, a refrigerant tank 6, a decompression device 7, and a dehumidifying heat exchanger 8, and includes a heat-radiating heat exchanger 4 in the outdoor unit 1 and a heat-radiating heat exchanger 5 in the indoor unit 2. Are connected by a pipe 9, the compressor 3 and the dehumidifying heat exchanger 8 are connected by another pipe 10, and a refrigerant circulates between the outdoor unit 1 and the indoor unit 2. After passing through the heat exchanger 8 and being dehumidified, it passes through the heat exchanger 5 for heat radiation.

[0008] A second separation type air conditioner according to the present invention is the separation type air conditioner according to the first aspect, wherein the outdoor unit 1 has a bypass 11 for refrigerant to bypass the heat exchanger 4 for heat radiation, and a bypass 11 for the refrigerant. Control valve 12 for controlling the inflow / stop of refrigerant to 11
Is provided, and the control valve 12 is automatically opened and closed based on the difference between the set room temperature and the actual room temperature.

[0009] The third separation type air conditioner according to the present application is the separation type air conditioner according to claim 1 or 2, wherein
The blower 13 is provided, and the operation and stop of the blower 13 are controlled based on the difference between the set room temperature and the actual room temperature.

[0010] A fourth separation type air conditioner of the present application is the separation type air conditioner according to any one of claims 1 to 3, wherein the capacity A of the refrigerant tank 6 is such that the heat exchange for heat radiation in the outdoor unit 1 is performed. And the volume C from the outlet of the heat-radiating heat exchanger 4 to the inlet of the heat-radiating heat exchanger 5 in the indoor unit 2.
And the volume D of the heat-radiating heat exchanger 5 has the following relationship. Volume A = (Volume B × 0.
5 + volume C + volume D × 0.2) × (1 ± 0.1)

[0011]

(Embodiment 1) FIG. 1 shows a first embodiment of a separation type air conditioner according to the present invention. This separation type air conditioner includes an outdoor unit 1 and an indoor unit 2 which are separated from each other. The outdoor unit 1 includes a compressor (compressor) 3, a heat-radiating heat exchanger (condenser) 4, and an outdoor blower (electric fan) 13, between the inlet side and the outlet side of the heat-radiating heat exchanger 4. A bypass 11 is provided, and a control valve 12 is provided in the bypass 11. The indoor unit 2 includes a heat-radiating heat exchanger (condenser) 5, a refrigerant tank 6, a pressure reducing device 7,
Dehumidifying heat exchanger (condenser) 8 and indoor blower 20
And a temperature sensor 21 and a humidity sensor 22. Heat radiating heat exchanger 4 and indoor unit 2 in outdoor unit 1
A pipe 9 is arranged between the heat-radiating heat exchangers 5 and a pipe 10 is arranged between the compressor 3 in the outdoor unit 1 and the dehumidifying heat exchanger 8 in the indoor unit 2. The refrigerant can be circulated between the outdoor unit 1 and the indoor unit 2, the temperature setting unit 23 between the temperature sensor 21 and the outdoor blower 13 and the control valve 12 turns on the humidity sensor 22 and the compressor 3. A humidity setting device 25 is connected to the switch 24 that is turned off.

The compressor 3 of the outdoor unit 1 shown in FIG. 1 sucks a low-pressure refrigerant (gas) from a dehumidifying heat exchanger 8 through a pipe 10, compresses the same, and sends it out as a high-pressure refrigerant (gas). The heat radiating heat exchanger 4 of the outdoor unit 1 radiates and liquefies the high-pressure refrigerant (gas) sent from the compressor 3. The outdoor blower 13 provided near the heat-radiating heat exchanger 4 forcibly cools (air-cools) the heat-radiating heat exchanger 4 to promote the heat radiation of the refrigerant.

The bypass 11 shown in FIG. 1 is for bypassing the high-pressure refrigerant (gas) sent from the compressor 3 to the heat exchanger 4 for radiating heat in the outdoor unit 1. When the control valve 12 is opened, the compressor 3 is opened. Most of the high-pressure refrigerant (gas) sent out of the compressor flows into the bypass 11, bypasses the heat-radiating heat exchanger 4 and is sent to the pipe 9 as it is, and when closed, the high-pressure refrigerant (gas) sent from the compressor 3. Is radiated through the radiating heat exchanger 4, liquefied and sent to the pipe 9.

A heat-radiating heat exchanger 5 of the indoor unit 2 shown in FIG. 1 is for radiating high-pressure refrigerant (gas or liquid) sent from a pipe 9. This is for liquefying the refrigerant by releasing heat. The refrigerant tank 6 in FIG. 1 is for storing excess refrigerant among the refrigerants (liquids) sent from the heat-radiating heat exchanger 5 to the pressure reducing device 7 so that the refrigerant does not have an excessive pressure.

The decompression device 7 shown in FIG. 1 is for decompressing the high-pressure refrigerant (liquid) sent from the refrigerant tank 6, and the high-pressure refrigerant (liquid) sent to the decompression device 7 is used.
Here, the pressure is reduced to a gas-liquid two-phase state and sent to the dehumidifying heat exchanger 8. The dehumidifying heat exchanger 8 is cooled by vaporizing the refrigerant liquid in the gas-liquid two-phase refrigerant that has been sent, and cools and dehumidifies the air passing therethrough. The low-pressure refrigerant (gas) that has passed through the dehumidifying heat exchanger 8 returns to the outdoor unit compressor 3 through the pipe 10 and is compressed again there.

As shown in FIG. 1, a suction port 30 and a discharge port 31 are provided on two opposing surfaces of the housing of the indoor unit 2.
When the indoor blower 20 disposed inside the air conditioner 1 is operated, indoor air is sucked from the suction port 30, and the sucked air is dehumidified by the heat exchanger 8 disposed inside the suction port 30. Heat exchanger 5 for heat radiation arranged near discharge port 31
, And is discharged from the discharge port 31 and returned to the room.

In FIG. 1, the humidity (actual room humidity) of the room air sucked from the suction port 30 is detected by the humidity sensor 22 provided near the suction port 30, and the detected room humidity and the humidity setting unit 25 detect the humidity. The set humidity is compared with the set humidity, and the switch 24 of the power supply circuit is opened and closed based on the difference between the two humidity, and the compressor 3 is operated (ON) and stopped (OFF). Specifically, when the detected actual indoor humidity is higher than the set humidity, the switch 24 is closed and the compressor 3
When the power is supplied to the compressor 3 and the compressor 3 operates, the switch 24 is opened and the power supply to the compressor 3 is released when the power is low,
The compressor 3 stops.

In FIG. 1, the temperature (actual room temperature) of the air taken in from the suction port 30 is detected by a temperature sensor 21 provided near the suction port 30, and the detected room temperature and the temperature setting unit 23 are detected. Is compared with the set temperature set by the external air blower 13 of the outdoor unit 1 based on the temperature difference.
Are turned ON / OFF, and the control valve 12 is opened / closed. Specifically, the two temperatures are compared in the temperature setting device 23 during the operation of the compressor 3, and when the detected room temperature is higher than the set value, the blower 13 is turned on by a control device (not shown), And control valve 12
Is closed to operate the dehumidifying / cooling operation, and when it is low, the blower 13 is turned off by the control device and the control valve 1
2 is opened to perform the dehumidifying and heating operation.

The volume A of the refrigerant tank 6 (maximum amount of refrigerant stored therein) A in FIG.
The volume B of the heat exchanger 4 for heat radiation of the outdoor unit 1, the volume C from the outlet of the heat exchanger 4 for heat radiation to the inlet of the heat exchanger 5 for heat radiation of the indoor unit 2, and the volume D of the heat exchanger 5 for heat radiation. Is set so as to satisfy the following relationship. These numerical values are calculated from the distribution of the refrigerant amount in the operating state. Volume A = (Volume B × 0.5 + Volume C + Volume D × 0.2)
× (1 ± 0.1)

The operation of the separation type air conditioner of the present invention shown in FIG. 1 will be described below for the dehumidifying cooling operation and the dehumidifying heating operation separately.

(During dehumidifying cooling operation) When the compressor 3 is operated and the high-pressure refrigerant (gas) is sent to the heat-radiating heat exchanger 4 with the control valve 12 shown in FIG. 1 closed, the refrigerant is cooled by the blower 13. And liquefaction. 2. The liquefied refrigerant passes through the pipe 9 and flows into the heat-radiating heat exchanger 5 of the indoor unit 2, where the refrigerant radiates slightly. 3. The refrigerant (liquid) that has passed through the heat exchanger 5 for heat radiation flows into the refrigerant tank 6 ahead of it, but flows into the decompression device 7 ahead of the refrigerant tank 6 without being accumulated in the refrigerant tank 6, and is decompressed. It becomes a two-phase state. 4. The refrigerant in a gas-liquid two-phase state flows into the dehumidifying heat exchanger 8 and vaporizes in the tubes of the heat exchanger 8, thereby removing surrounding heat and cooling the heat exchanger 8. . At this time, the indoor air sucked from the inlet 30 by the blower 20 of the indoor unit 2 and passing through the dehumidifying heat exchanger 8 is cooled and dehumidified. The dehumidified air passes through the heat exchanger 5 for heat radiation behind the heat exchanger 8 for dehumidification, but the heat exchanger 5 has almost no heat radiation of the refrigerant as described above. Is discharged from the discharge port 31 only by heating. Therefore, most of the electrical energy from the outside and the energy for cooling and dehumidifying heat are radiated to the outside air from the heat radiating heat exchanger 4 of the outdoor unit 1, and dehumidifying and cooling are performed indoors.

(During dehumidifying and heating operation) When the compressor 3 is operated and the high-pressure refrigerant (gas) is sent directly to the pipe 9 via the bypass 11 with the control valve 12 shown in FIG. 1 open, some refrigerant flows into the heat exchanger 4 for heat radiation. Since the blower 13 is not operated, the blower 13 hardly dissipates heat and merges with the refrigerant from the bypass 11 in the pipe 9 in a gaseous state. 2. The refrigerant (gas) passes through the pipe 9 and flows into the heat-radiating heat exchanger 5 of the indoor unit 2, where it radiates heat and is liquefied. 3. The refrigerant (liquid) that has passed through the heat exchanger 5 for heat radiation flows into the refrigerant tank 6 ahead of it, but flows into the decompression device 7 ahead of the refrigerant tank 6 without being accumulated in the refrigerant tank 6, and is decompressed. It becomes a two-phase state. 4. The refrigerant in a gas-liquid two-phase state flows into the dehumidifying heat exchanger 8 and vaporizes in the tubes of the heat exchanger 8, thereby removing surrounding heat and cooling the heat exchanger 8. . This cools and dehumidifies the indoor air sucked from the suction port 30 and passing through the dehumidifying heat exchanger 8 by the action of the blower 20 of the indoor unit 2. When the dehumidified air passes through the heat radiation heat exchanger 5 behind the heat exchanger 8 for dehumidification,
It is heated by the heat released from the heat exchanger 5 and is discharged from the discharge port 31. Therefore, most of the electrical energy from the outside and the energy of the cooling and dehumidifying heat are returned to the dehumidified air in the heat-radiating heat exchanger 5 of the indoor unit 2, so that the dehumidifying and heating are performed indoors.

In the dehumidifying cooling operation and the dehumidifying heating operation, the blower 13 is turned on / off based on the difference between the room temperature detected by the temperature sensor 21 and the temperature setting unit 23 and the set temperature.
The automatic switching is performed by opening / closing the FF and the control valve 12, so that the room temperature is maintained at the set temperature.
Further, in both the dehumidifying cooling operation and the dehumidifying heating operation, the compressor 3 is appropriately turned ON / OF based on the difference between the indoor humidity detected by the humidity sensor 22 and the humidity setting device 25 and the set humidity.
By performing F (opening / closing the switch 24), the dehumidification function is activated / stopped so that the room humidity is maintained at the set humidity. In addition, it can also be arbitrarily fixed to either the dehumidifying cooling operation or the dehumidifying heating operation.

(Embodiment 2) Volume A of the refrigerant tank 6
The numerical value regarding is an example, and is not necessarily limited to the above numerical value. However, if the volume is too small, the function of the refrigerant tank 6 to prevent the excess pressure of the refrigerant is not sufficiently exhibited, and if the volume is too large, the required amount of the refrigerant increases or the cost increases. It is necessary to set a suitable volume in consideration of balance.

[0025]

The first separation type air conditioner of the present application has the following effects. 1. Since the device dew point temperature of the heat exchanger in the indoor unit does not increase, the dehumidifying ability does not decrease unlike a conventional air conditioner. 2. Since the outdoor unit and the indoor unit are separated from each other, the room is not heated by the heat generated as in the conventional integrated-type dehumidifier. 3. Since it is possible to perform both dehumidification of cooling and dehumidification of heating, air conditioning of kitchens and their backyards with large latent heat load and small sensible heat load, indoor air conditioning that needs to reduce humidity without raising temperature, This is extremely useful as a dehumidifier exclusively for latent heat load when a separation type air conditioner having a low dehumidifying capacity is used.

[0026] The second separation type air conditioner of the present application includes a bypass for allowing the refrigerant to bypass the heat radiating heat exchanger to the outdoor unit;
A control valve is provided to control the flow of refrigerant into and out of the bypass, and the control valve is automatically opened and closed based on the difference between the set room temperature and the actual room temperature. The dehumidifying and heating operation is switched, and the room is always maintained at the desired humidity and temperature.

In the third separation type air conditioner of the present application, since the outdoor unit is provided with a blower for forcibly cooling the heat radiating heat exchanger, the heat radiation of the refrigerant in the heat radiating heat exchanger is highly efficient. And since it is performed stably, the dehumidifying function and the cooling / heating function are improved and stabilized. Further, since the blower is controlled based on the difference between the set room temperature and the actual room temperature, the effect can be obtained without any special operation.

In the fourth separation type air conditioner of the present application, the volume A of the refrigerant tank is equal to the volume B of the heat exchanger for heat radiation, and the volume C from the outlet of the heat exchanger for heat radiation to the inlet of the heat exchanger for heat radiation.
And the volume D of the heat exchanger for heat dissipation and the volume A = (volume B × 0.5 + volume C + volume D × 0.2)
× (1 ± 0.1), the function of the refrigerant tank to prevent the excess pressure of the refrigerant is sufficiently exhibited, and problems such as an increase in the amount of refrigerant and an increase in cost occur. do not do.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing the structure of a separation type air conditioner of the present invention.

FIG. 2 is a schematic view showing an example of a conventional dehumidifier.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Indoor unit 3 Compressor 4 Heat radiator for outdoor unit 5 Heat radiator for indoor unit 6 Refrigerant tank 7 Decompression device 8 Dehumidification heat exchanger 9 Pipe 10 Pipe 11 Bypass 12 Control valve 13 Blower

Claims (4)

[Claims] In a separate air conditioner separated into an outdoor unit (1) and an indoor unit (2), the outdoor unit (1) includes a compressor (3) and a heat exchanger for heat dissipation (4). The unit (2) includes a heat exchanger for radiation (5), a refrigerant tank (6), a decompression device (7), and a heat exchanger for dehumidification (8), and the heat exchanger for radiation in the outdoor unit (1). 4) and a heat-radiating heat exchanger (5) in the indoor unit (2) are connected by a pipe (9), and the compressor (3) and the dehumidifying heat exchanger (8) are connected to another pipe (10).
And the refrigerant circulates between the outdoor unit (1) and the indoor unit (2), and the indoor air passes through the dehumidification heat exchanger (8) and is dehumidified, and then the heat radiation heat exchanger ( 5) A separation type air conditioner characterized by passing through. 2. The separation type air conditioner according to claim 1, wherein the outdoor unit (1) includes a bypass (11) through which the refrigerant bypasses the heat-exchanging heat exchanger (4) and a bypass (11). A control valve (12) for controlling the inflow / stop of the refrigerant is provided,
The separation type air conditioner, wherein the control valve (12) is automatically opened and closed based on a difference between a set room temperature and an actual room temperature. 3. An air conditioner according to claim 1, wherein the outdoor unit (1) is provided with a blower (13),
The separation type air conditioner is characterized in that operation and stop of the blower (13) is controlled based on a difference between a set indoor temperature and an actual indoor temperature. 4. A separation type air conditioner according to claim 1, wherein the volume A of the refrigerant tank (6) is:
Volume B of heat exchanger (4) for heat radiation in outdoor unit (1)
And the volume C from the outlet of the heat-radiating heat exchanger (4) to the inlet of the heat-radiating heat exchanger (5) in the indoor unit (2), the volume D of the heat-radiating heat exchanger (5), and the following: A separation type air conditioner characterized by having a relationship. Volume A = (Volume B × 0.5 +
Volume C + Volume D × 0.2) × (1 ± 0.1)