JPH11193940A - Outdoor-air cooling system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor-air cooling system which can efficiently cool the whole inside space of a room, by preventing the increase of condensing pressure in its outdoor machine without lowering cold air blowing-out quantity of its indoor machine. SOLUTION: This outdoor air cooling system is provided with an outdoor machine 1 which is installed outdoors and incorporated with a compressor and a condenser for refrigerant, an indoor machine 2 which is installed indoors and incorporated with a evaporator for refrigerant, a refrigerant pipeline 3 laid between the outdoor machine 1 and the indoor machine 2, and an outdoor- air suction pipe 4 which takes outdoor air in the indoor machine 2. The indoor machine 2 has an air blowing-out port 2a for blowing cold air into a room. The capacity of the outdoor machine 1 is made larger than that of the indoor machine 2. Since the capacity of the outdoor machine 1 is larger than that of the indoor machine 2, the increase of condensing pressure in the outdoor machine 1 can be prevented and the problem of the indoor machine 2 related to the cold air blowing-out quantity can be solved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor air cooling device that takes in outside air into an indoor unit, cools the air, and then blows the air into an indoor space. In particular, the present invention relates to an outdoor air cooling device improved so that the amount of air blown out from an indoor unit can be ensured even when the outdoor air temperature is high, and cool air can be spread over a wide indoor space.

[0002]

2. Description of the Related Art First, a basic configuration of a conventional general gas heat pump (hereinafter, also referred to as GHP) used for a cooling device will be described. FIG. 2 is a system diagram showing a configuration of a heat cycle including a gas engine driven compressor. The heat cycle 100 includes a compressor 101, a condenser 113, an expansion valve 115, an evaporator 117, and piping connecting them.

[0003] A compressor 101 is driven by a gas engine 102 (motor). The gas engine 102 is a reciprocating engine (or turbine) that receives supply of city gas from a gas supply pipe 103 and uses the gas as fuel.
The speed (output) of the gas engine 102 is controlled by a gas flow control valve 104 of a gas supply pipe 103. The compressor 101 sucks the refrigerant from the suction port 101a, compresses the refrigerant, and discharges the refrigerant from the discharge port 101b.

[0004] The compressed refrigerant is cooled and condensed in the condenser 113 by receiving external air from the fan 114. The condensed refrigerant is sent to an indoor air conditioner or the like, and is expanded by the expansion valve 115 and the evaporator 117.
A large amount of heat is taken from the air sucked in 18 to cool the room. The refrigerant returns from the evaporator 117 to the compressor 101 again, and thereafter circulates similarly.

[0005] Among them, the gas engine 102, the compressor 1
01, a condenser 113, a fan 114 and the like are unitized as an outdoor unit, and an expansion valve 115, an evaporator 11
7 and a fan 118 are unitized as an indoor unit. Conventionally, the cooling device including the outdoor unit and the indoor unit includes a normal air conditioner that takes in the indoor air with the indoor unit and cools the air, and then blows the indoor air, and cools the outdoor air with the indoor unit. There is an outdoor air cooling device that blows air indoors later.

The conventional ordinary air conditioner will be described below. FIG. 3 is a schematic diagram showing a configuration of a normal air conditioner. This conventional ordinary air conditioner includes an outdoor unit 31 installed outdoors, an indoor unit 32 installed indoors,
Refrigerant piping 3 provided between outdoor unit 31 and indoor unit 32
3 is provided. In addition, the indoor unit 32 includes an air inlet 32a that takes in indoor air, and an air outlet 32b that blows cool air into the room.

In this conventional ordinary air conditioner, the capacity of the outdoor unit 31 and the capacity of the indoor unit 32 are equal. With the above configuration, for example, the outdoor unit 31 and the indoor unit 32
When the capacity (output) of each is set to about 10 horsepower, the indoor air at a temperature of about 27 ° C. is supplied to the air inlet 32 of the indoor unit 32.
a, the indoor air is cooled to a temperature of about 12 ° C. to 13 ° C. by the refrigerant sent from the outdoor unit 31 to the indoor unit 32 via the refrigerant pipe 33, and the air outlet 3
It blows out from 2b into the room.

Next, a conventional outside air cooling device will be described below. FIG. 4 is a schematic diagram showing a configuration of a conventional outside air cooling device. The conventional outdoor air cooling device includes an outdoor unit 41 installed outdoors, an indoor unit 42 installed indoors,
Refrigerant pipe 4 provided between outdoor unit 41 and indoor unit 42
3 and an outside air suction pipe 44 for taking in outside air from outside to the indoor unit 42. Further, the indoor unit 42 includes an air outlet 42a that blows cool air into the room.

In this conventional outdoor air cooling device, the capacity of the outdoor unit 41 and the capacity of the indoor unit 42 are equal. With the above configuration, for example, when the capacity of each of the outdoor unit 41 and the indoor unit 42 is set to about 10 horsepower, the outdoor air (outside air) having a temperature of about 33 ° C. is supplied from the outside air suction pipe 44 to the indoor unit 4.
2 and is cooled to a temperature of about 12 ° C. to 13 ° C. by the refrigerant sent from the outdoor unit 41 to the indoor unit 42 via the refrigerant pipe 43, and is blown into the room from the air outlet 42a. ing.

[0010]

However, in general, in the outside air cooling device, when the outside air temperature rises to some extent, the condensation pressure of the condenser of the outdoor unit increases due to the increase of the evaporation pressure of the evaporator of the indoor unit. As a result, the temperature of the air blown from the indoor unit also increases. Therefore,
In the conventional outdoor air cooling device as shown in FIG. 4, an increase in the condensation pressure of the outdoor unit due to an increase in the outdoor air temperature is prevented.
Further, in order to keep the temperature of the air blown out from the indoor unit at a low temperature, the amount of cool air blown out from the indoor unit is reduced to about 1/3 that of a normal air conditioner. For this reason, when air-conditioning a large indoor space, there is a problem that it is difficult to efficiently cool the entire indoor space because the range of the cool air from the indoor unit is narrow.

The present invention has been made in view of such a problem, and an object of the present invention is to reduce the amount of cold air blown out.
It is an object of the present invention to provide an outdoor air cooling device capable of preventing an increase in condensation pressure in an outdoor unit and efficiently cooling the entire indoor space.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an outside air cooling device according to the present invention comprises an outdoor unit including a refrigerant compressor and a condenser, and an indoor unit including a refrigerant evaporator. An outdoor air cooling device which takes in the indoor unit, cools the air, and then blows the air into the indoor space; wherein the capacity of the outdoor unit is larger than the capacity of the indoor unit. By making the capacity of the outdoor unit larger than the capacity of the indoor unit, it is possible to prevent an increase in the condensing pressure in the outdoor unit, so that it is possible to solve the problem related to the blowout air volume of the indoor unit.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an outside air cooling system according to the present invention. FIG. 1 is a schematic diagram showing a configuration example of the outside air cooling device of the present invention. This outdoor air cooling device is installed outdoors, and an outdoor unit 1 including a refrigerant compressor (not shown) and a condenser (not shown), and an indoor unit, and a refrigerant evaporator (not shown) Indoor unit 2 including
And a refrigerant pipe 3 provided between the outdoor unit 1 and the indoor unit 2
And an outside air suction pipe 4 that takes in outside air from the outside to the indoor unit 2. In addition, the indoor unit 2 includes an air outlet 2a that blows cool air into the room.

In the outdoor air cooling device of the present invention, the capacity (output) of the outdoor unit 1 is larger than the capacity (output) of the indoor unit 2. With the above configuration, for example, when the capacity of the indoor unit 2 is set to about 10 horsepower and the capacity of the outdoor unit 1 is set to 13 horsepower, which is about 1.3 times that of the indoor unit 2, the outdoor unit 1 has its compressor (not shown). And a condenser (not shown) compresses and condenses the refrigerant, and sends the condensed refrigerant to the indoor unit 2 via the refrigerant pipe 3. The indoor unit 2 sucks outdoor air (outside air) having a temperature of about 33 ° C. from the outside air suction pipe 4, and uses the refrigerant sent from the outdoor unit 1 through the refrigerant pipe 3 to convert the sucked outside air into an evaporator (not shown). ), And is cooled to a temperature of about 20 ° C., and is blown into the room through the air outlet 2a.

At this time, since the capacity of the outdoor unit 1 is set to about 1.3 times the capacity of the indoor unit 2, even if the evaporation pressure of the indoor unit 2 rises due to the rise of the outside air temperature, the refrigerant of the outdoor unit 1 is not removed. Since the condensing pressure can be kept constant, stable operation is ensured. In addition, the amount of air blown out from the air outlet 2a of the indoor unit 2 can be set to the same amount as that of a normal air conditioner, and the cool air can be spread over a wide indoor space. Furthermore, since the evaporation pressure in the indoor unit 2 is high while the condensation pressure of the refrigerant in the outdoor unit 1 is kept constant, the coefficient of performance of the cooling cycle is improved.

Although the embodiment of the outdoor air cooling device of the present invention has been described above, the capacity of the outdoor unit is not limited to about 1.3 times the capacity of the indoor unit, and may be any size as long as it is larger than the capacity of the indoor unit. Further, the configuration of the present invention is not limited to a cooling device, but can be applied to a refrigeration device and the like.

[0017]

As described above, according to the outdoor air cooling device of the present invention, the capacity of the outdoor unit is made larger than the capacity of the indoor unit. The condensing pressure of the refrigerant in the machine can be kept constant, so that stable operation can be ensured.

Further, according to the outside air cooling device of the present invention, the condensing pressure of the refrigerant in the outdoor unit can be kept constant, so that the air volume blown out from the indoor unit is set to the same level as that of a normal air conditioner. It has become possible to spread cold air into a large indoor space.

Further, according to the outside air cooling apparatus of the present invention, the evaporation pressure in the indoor unit is increased while the condensation pressure of the refrigerant in the outdoor unit is kept constant, so that the coefficient of performance of the cooling cycle is improved. Now you can do it.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an embodiment of an outside air cooling device according to the present invention.

FIG. 2 is a system diagram showing a configuration of a heat cycle.

FIG. 3 is a schematic view showing an embodiment of a conventional general air conditioner.

FIG. 4 is a schematic diagram showing one embodiment of a conventional outside air cooling device.

[Explanation of symbols]

1, 31, 41 Outdoor unit 2, 32, 42
Indoor units 2a, 32b, 42a Air outlets 32a Air inlets 3, 33, 43 Refrigerant pipes 4, 44 Outside air suction pipes 100 Heat cycle 101 Compressor 101a Suction ports 101b Discharge ports 102 Gas engine (motor) 103 Gas supply pipe 104 Gas flow control valve 113 Condenser 114, 118 Fan 115 Expansion valve 117 Evaporator

Claims (2)

[Claims] 1. An outdoor air cooling apparatus comprising an outdoor unit including a refrigerant compressor and a condenser, and an indoor unit including a refrigerant evaporator, taking in outside air into the indoor unit, cooling the air, and then blowing the air into the indoor space. An outdoor air cooling device, wherein the capacity of the outdoor unit is larger than the capacity of the indoor unit than usual. 2. The outdoor air cooling device according to claim 1, wherein the capacity of the outdoor unit is at least about 1.3 times the capacity of the indoor unit.