JPS5995345A - Air conditioner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioner that performs cooling operation and heating operation as a bypass pipe is opened and closed.

Conventionally, there was a device for this type of rod as shown in FIG.

In the figure, (1) is the compressor, (2) is the condenser, and (3)
is a capillary tube, and (4) is an evaporator.

When operating an air conditioner with the above configuration, the compressor (
In the operation of 1), the high temperature and high pressure gas refrigerant is condensed in the condenser (2), passes through the 1 capillary (3+), is depressurized, reaches the evaporator (4), and evaporates. As a result.

In the evaporator (4), cooling operation is performed using a refrigerant.

However, in the case of an air conditioner having the above configuration, only a cooling operation is possible, and the period of use is limited. For this reason, when considering heating operation, it has been proposed to attach a heater to the evaporator (4), but in this case there are problems in that the structure is complicated and expensive, and moreover, the power consumption increases. The evaporator (
4) Heating operation is performed by flowing high-temperature, high-pressure refrigerant gas, but even in this case, the refrigeration cycle becomes complicated and costs increase significantly.

The present invention was made in order to eliminate the above-mentioned conventional drawbacks, and provides an air conditioner that is inexpensive and capable of heating operation with low input.

An embodiment of the present invention will be described below with reference to the drawings. Second
In the figure, (1) is the compressor, (2) is the condenser, and (3)
is a capillary tube, (4) is an evaporator, (5) is a bypass passage (6
) is a solenoid valve installed inside.

When the air conditioner with the above configuration is operated, the solenoid valve (5) is closed during cooling, and the high-temperature, high-pressure refrigerant gas discharged from the compressor +11 is transferred to the condenser (2)9 capillary tube. (3), evaporates in the evaporator (4), and performs cooling operation. Next, when the solenoid valve (5) is opened, the refrigerant gas discharged from the compressor (11) flows through the condenser (2) and the bypass pipe (6). Since the pressure loss is very small compared to the pressure loss of one capillary (3), the refrigerant mostly flows through the bypass pipe (6).As a result, the high temperature and high pressure refrigerant discharged from the compressor (11) The pressure of the gas is reduced by the solenoid valve (5) installed in the bypass pipe (6), and the heat is radiated by the evaporator (4) to perform heating operation.In this case, the heat radiated is transferred to the compressor (
It is supplied from the input of 1).

In the above embodiment, the case of heating operation was explained, but it may also be used as a defrosting operation for the lid box of the evaporator (4), and as shown in FIG. )
instead of pressure loss due to.

A coupling (7) may be attached to the inlet and outlet of the evaporator (4) to provide pressure loss.

As described above, the present invention has a simple configuration, inexpensively,
In addition, the present invention provides an air conditioner that can perform heating and cooling operations with low input power, and is highly effective in reducing costs and saving energy.

[Brief explanation of drawings]

Fig. 1 is a refrigerant circuit diagram of a conventional air conditioner, Fig. 2 is a refrigerant circuit diagram of an air conditioner according to an embodiment of the present invention, and Fig. 8 is a refrigerant circuit diagram of an air conditioner showing another embodiment. It is. (5) is a solenoid valve, (6) is a bypass pipe, and (7) is a coupling. In addition, in FIG. 1, the same reference numerals indicate the same or equivalent parts. Agent Shin Kuzuno −

Claims (1)

[Claims] In a refrigeration cycle composed of a compressor, a condenser, a capillary tube, and an evaporator, a bypass line equipped with a solenoid valve is provided between the compressor outlet and the capillary outlet, and the refrigerant is allowed to flow through the bypass line. An air conditioner characterized in that the evaporator enables simple heating.