JPH06109332A - Multi-chamber type air conditioner - Google Patents

Abstract

PURPOSE:To obtain a multi-chamber type air conditioner, reduced in the scattering in cooling capacities of respective indoor units in spite of the number of operating devices from the operation of a plurality of indoor units to the operation of one set of indoor unit. CONSTITUTION:A multi-chamber type air conditioner is constituted of an outdoor unit 12, accommodating a compressor 2, a condenser 3, a fan 4 for the condenser and a motor-driven expansion valve 5, a branch unit 13, accommodating a distributor 1 accommodating nozzles 1a made of a shape memory alloy, a plurality of solenoid valves 6 and a plurality of capillary tubes 7, and a plurality of indoor units 10, accommodating an evaporator 8 and a fan 9 for the evaporator. Scattering of cooling capacities of respective indoor units 10 can be minimized regardless of the number of operating sets of the indoor units 10 utilizing a characteristic that the inner diameter of the nozzle 1a is increased when the temperature of the nozzle 1a is risen while the inner diameter of the same is reduced when the temperature is lowered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-room air conditioner which provides comfortable and efficient air conditioning.

[0002]

2. Description of the Related Art In recent years, the number of air conditioners in a general household is changing from one in one family to one in one room. Against this background, comfortable and efficient multi-room air conditioners are desired.

An example of a conventional multi-room air conditioner will be described below with reference to FIGS. 4 and 5. In FIG. 4, a cross-sectional view of a general distributor 101 is shown. Next, FIG. 5 shows a refrigeration circuit diagram of a multi-room air conditioner using the distributor 101. As shown in the figure, a compressor 102, a condenser 103, a condenser blower 104, and an electric expansion valve 10
An outdoor unit 100 having a built-in 5 and a distributor 101.
And the solenoid valve 106 corresponding to each indoor unit 108a
A branch unit 106a having a plurality of capillary tubes 107 built therein, an evaporator 108, and a plurality of indoor units 108a having a blower 109 for the evaporator built therein are connected to form a multi-room air conditioner. .

In the above structure, when the multi-room air conditioner is operated, the refrigerant gas having a high temperature and high pressure in the compressor 102 is radiated to the outside air by the functions of the condenser 103 and the condenser blower 104, and the refrigerant gas is liquefied. , Next electric expansion valve 10
After going through 5, it becomes a gas-liquid two-phase refrigerant.

Next, the gas-liquid two-phase refrigerant is distributed to the distributor 101.
Gas and liquid are mixed by passing through the built-in nozzle 101a, and then the pressure is reduced from a plurality of electromagnetic valves 106 on the downstream side through a plurality of capillary tubes 107 to a low pressure, a plurality of evaporators 108 and a plurality of evaporator blowers. By working with 109, the room air is cooled and the refrigerant is vaporized into a low-pressure gas, which is sucked into the compressor 102.

[0006]

In such a conventional multi-room air conditioner, the refrigerant circulation amount varies widely from one indoor unit 108a to simultaneous operation of a plurality of indoor units 108a. Under this condition, since the opening cross-sectional area of the nozzle 101a of the distribution pipe 101 is constant, even if the opening cross-sectional area is optimal when distributing to the four indoor units 108a, for example, refrigerant circulation during operation of two The amount of the refrigerant is too large, and the flow of the refrigerant to the individual indoor units 108a may be biased, resulting in poor distribution accuracy, resulting in a large variation in the cooling capacity of each indoor unit 108a.

The present invention solves the above-mentioned problems, and in response to the change in the operating state of one to a plurality of indoor units 108a, optimal refrigerant distribution can be achieved and the cooling capacity of each indoor unit 108a can be improved. It is an object of the present invention to provide a multi-room air conditioner capable of minimizing the variation in the air conditioner.

[0008]

In order to achieve the above object, a multi-room air conditioner of the present invention comprises an outdoor unit having a compressor, a condenser, a blower for the condenser, and an electric expansion valve. , A distributor, a plurality of solenoid valves, a branch unit containing a plurality of capillary tubes, an evaporator,
When a plurality of indoor units including a blower for an evaporator are connected to each other and the operation of one indoor unit and the simultaneous operation of the plurality of indoor units can be performed, the nozzles incorporated in the distributor are connected to each other. A shape memory alloy is used, and the refrigerant flow rate is controlled according to the number of operating indoor units.

[0009]

According to the present invention, when the number of operating indoor units changes, the refrigerant circulation amount increases / decreases correspondingly, but under this condition, the temperature of the refrigerant flowing through the distribution pipe is high if the refrigerant circulation amount is large. On the contrary, it has a characteristic that it becomes low temperature if it is small, and by utilizing this characteristic, the inner diameter of the shape memory alloy nozzle built in the distribution pipe changes according to each refrigerant circulation amount, By being in the liquid mixing state, it is possible to obtain a multi-room air conditioner in which the refrigerant distribution is not biased and the cooling capacity of the plurality of indoor units is less varied.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1, 2 and 3. As shown in the figure,
An outdoor unit 12 having a compressor 2, a condenser 3, a condenser blower 4, and an electric expansion valve 5 built therein, a distributor 1 having a nozzle 1a made of a shape memory alloy built therein, and each indoor unit 10. Corresponding solenoid valve 6, branch unit 13 containing a plurality of capillary tubes 7, and evaporator 8
And a plurality of indoor units 10 having an evaporator blower 9 built therein are connected to form a multi-room air conditioner.

In the above structure, when the multi-room air conditioner is operated, the refrigerant gas that has become high temperature and high pressure in the compressor 2 is
The refrigerant gas is liquefied by the function of the condenser 3 and the condenser blower 4 and is radiated to the outside air, and liquefied, and becomes a gas-liquid two-phase refrigerant through the next electric expansion valve 5. Next, the gas-liquid two-phase refrigerant enters the distributor 1 and passes through the built-in nozzle 1a to be gas-liquid mixed, and is depressurized from a plurality of downstream solenoid valves 6 through a plurality of capillary tubes 7 to a low pressure. The indoor air is cooled by the functions of the plurality of evaporators 8 and the plurality of evaporator blowers 9, and the refrigerant is vaporized into a low-pressure gas, which is sucked into the compressor 2.

Here, the characteristic feature is that the nozzle 1
By using a shape memory alloy having such a characteristic that the inner diameter becomes larger as the temperature becomes higher in a and becomes smaller as the temperature becomes lower, for example, when four indoor units 10 are simultaneously operated, the refrigerant circulation amount also increases. , The refrigerant flowing through the distributor 1 becomes high temperature, the inner diameter of the nozzle 1a incorporated therein becomes large, the gas-liquid mixing is optimized, the refrigerant distribution to each indoor unit 10 is not biased, and there is little variation in each cooling capacity. The device is obtained. On the contrary, when the two indoor units 10 are operated, the refrigerant circulation amount also decreases, the refrigerant flowing through the distributor 1 has a low temperature, the inner diameter of the nozzle 1a incorporated therein becomes small, and the nozzle opening area corresponding to the refrigerant circulation amount. Gas-liquid mixing is optimized by
It is possible to obtain a device in which the variation in the cooling capacity of each indoor unit 10 is small.

As described above, according to the multi-room type air conditioner of the embodiment of the present invention, the opening area of the nozzle is changed according to the number of operating indoor units 10, and air conditioning with little variation in each cooling capacity can be performed.

In the embodiment, the pressure reducing device includes an electric expansion valve 5
Although the example using is explained, a temperature type expansion valve may be used and there is no difference in its action and effect.

[0015]

As is apparent from the above embodiments, according to the present invention, by using the shape memory alloy for the nozzles incorporated in the distributor, regardless of the number of operating indoor units,
It is possible to provide a multi-room air conditioner with less variation in the cooling capacity of each indoor unit.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a distributor of a multi-room air conditioner according to an embodiment of the present invention.

FIG. 2 is an external perspective view of the distributor.

[Fig. 3] The same refrigeration circuit diagram

FIG. 4 is a longitudinal sectional view of a distributor of a conventional multi-room air conditioner.

[Fig. 5] The same refrigeration circuit diagram

[Explanation of symbols]

 1 Distributor 1a Nozzle 2 Compressor 3 Condenser 4 Blower for condenser 5 Electric expansion valve 6 Solenoid valve 7 Capillary tube 8 Evaporator 9 Blower for evaporator 10 Indoor unit 12 Outdoor unit 13 Branch unit

Claims (1)

[Claims] 1. A compressor, a condenser, and a blower for the condenser,
An outdoor unit containing an electric expansion valve, a distributor, a plurality of solenoid valves, a branching unit containing a plurality of capillary tubes, an evaporator, and a plurality of indoor units containing an air blower for the evaporator. When connected and capable of operating one indoor unit and simultaneously operating a plurality of indoor units, a shape memory alloy is used for the nozzle incorporated in the distributor, and the number of operating indoor units A multi-chamber air conditioner that controls the flow rate of the refrigerant in accordance with the requirements.