JPS60238647A - Gas injection type 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 Field of the Invention The present invention relates to a gas injection type air conditioner.

The configuration of the conventional example and its problems are shown below.
M @ 4 (a'' Imo Station Calculation Journal) Cold Morning 1. Sosuzijintei Keishan.Then, between the condenser 2 and the evaporator 3, the pressure is reduced to an intermediate pressure, A gas-liquid separator 6 that separates gas and liquid (the first gear shaft 26 and the first capillary 6 store the refrigerant separated into gas and liquid)
Then, a second capillary 7 which acts as an expander for expanding the liquid medium separated by the gas-liquid separator 6 and stored in the upper part, and guiding and depressing it to the evaporator 3 is sequentially connected. 5 Further (l [=, Gas in of pressure m machine 1 from the upper part of gas-liquid divider 6 /, - Introduction to introduce cold tofu for cass injector to comb 974 human part 8? 69) There are 10 connected.

Further, in the middle of the introduction pipe 9, an electromagnetic circuit 10 is installed to open a circuit at the point 7 where C-gas injection is necessary.

And then the traditional Gasui/Jekunyonka ceremony! When an air conditioner requires a large amount of cooling and heating capacity, the air is drawn out from the upper part of the gas-liquid separator 6, and the compressor is connected to the inlet pipe 9 through the solenoid valve 10 (~ Injection is performed by energizing the solenoid valve 10. In particular, since the load on the compressor 1 increases during injection/hour, it is limited to a short time such as during start-up operation, or when the load is Injection was performed only when operating at a low frequency of 5oHz.

However, if the operation is limited to the above-mentioned conditions, the operating range becomes narrow, and the injection may not be performed when the outside temperature is low, when heating is actually most needed.

OBJECTS OF THE INVENTION It is an object of the present invention d1 to provide a cooling system that performs injection to improve performance at low outside temperatures during heating.

Arrangement of the Invention To achieve this objective, the present invention provides a compressor discharge (I
A pressure switch is installed in II, and in conjunction with this pressure switch, the solenoid valve for gas injection is fully opened and closed. In this case, the discharge pressure will also drop at the same time, so if you detect 1 nick (at this time) and operate it to perform gas injection when the pressure drops,
Regardless of power frequency such as 50Hz or 6oHz, and fluctuations in outside temperature and indoor conditions, especially when the compressor is under one load, when more heating capacity is required, such as during heating at low outside temperatures. Effectively produce an effect. .

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Items that are the same as conventional ones will be designated by the same reference numerals and their detailed explanation will be omitted. .

A solenoid valve 13 is provided midway through the introduction pipe 9 and is interlocked with a pressure switch 12 provided at the discharge portion 11 of the compressor 1 .

A power source 14 connects the coil 15 of the solenoid valve 13 and the contact 16 of the pressure switch 12 in series.

Next, the operation based on the above configuration will be described.

The refrigerant discharged from the compressor 1 is condensed and liquefied in the condenser 2, and then depressurized in the intermediate pressure groove in the first capillary 6, and then guided to the gas-liquid separator 6.

At this time, since the refrigerant is only reduced in pressure to an intermediate pressure, the inside of the gas-liquid divider 6 is completely divided into liquid refrigerant and gas refrigerant. Then, the liquid is extracted from the bottom of the gas-liquid official residence 1 vessel 6.
After being led to the capillary 7 and further reduced in pressure, it is evaporated in the evaporator 3 to form a cycle that returns to the compressor 1. On the other hand, the upper gas refrigerant in the gas-liquid separation vessel 6 is partially guided to the injection introduction section 8 of the compressor 1 via the electromagnetic valve 13 through the introduced introduction pipe 9.

The solenoid valve 13 on the seventh lever is equipped with a pressure switch 12 that turns on when the discharge pressure of the compressor 1 becomes low, so the load factor of the compressor 1 is low, such as when the outside temperature is low for heating. In this case, the discharge pressure becomes low, the solenoid valve 13 is energized, a gas injection circuit is formed, and the gas is injected into the compressor 1, increasing the capacity and providing a sufficient heating effect.

Effect of the invention As described above, according to the present invention, a compressor and a condenser are provided.

The evaporators are connected in a ring, a gas-liquid separator is provided between the condenser and the evaporator, and a solenoid valve is provided between the upper part of the gas-liquid separator and the compression tower, and the discharge of the compressor is linked with the solenoid valve rC. This is a gas injection type air conditioner that is equipped with a pressure switch, so only when the load factor of the compressor decreases, such as when the outside temperature is low for heating, the pressure switch is opened to form a gas injection circuit. Because of this configuration, the capacity can be increased only during heating conditions that require the capacity anop, and sufficient heating capacity can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a cooling system for an air conditioner showing an embodiment of the present invention, FIG. 2 is an electric circuit diagram of FIG. 1, and FIG. 3 is a conventional cooling cycle diagram. 1... Compressor, 2... Condenser, 3... Evaporator,
6... Gas-liquid separator, 11... Pressure switch, 12... Solenoid valve. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] A cooling system is constructed by connecting a compressor, a condenser, an evaporator, etc. in an annular manner, and a gas-liquid separator is provided between the condenser and the evaporator of the cooling system, and an upper part of the gas-liquid separator and A gas injector type air conditioner, which is equipped with an air conditioner connected to a compressor through a solenoid valve, and has a pressure switch in the discharge direction of the compressor that is linked to the solenoid valve.