KR100427278B1 - System for controling refrigerant pressure of air conditioner - Google Patents

Abstract

The present invention relates to an air conditioner refrigerant pressure adjusting device, and when the air conditioner is normally operated or stopped, the inside of the container is set to a low pressure gas phase, and when the high pressure is applied to the liquid refrigerant by using the opening and closing action of the valve means By keeping the pressure inside the refrigerant at a constant level, the optimum cooling performance can be maintained even in dual and single mode and high RPM, and the refrigerant pressure is always kept constant, resulting in overheating of the compressor. It is an object of the present invention to provide an air conditioner refrigerant pressure adjusting device capable of preventing durability deterioration and preventing engine cooling performance deterioration due to an increase in condenser temperature.

Description

System for controling refrigerant pressure of air conditioner

The present invention relates to an air conditioner refrigerant pressure adjusting device, and more particularly, when the pressure of the refrigerant rises due to an increase in the RPM of the compressor in the air conditioner system, a portion of the refrigerant is recovered and stored and stored when returned to an appropriate pressure. The present invention relates to an air conditioner refrigerant pressure adjusting device capable of maintaining a constant pressure in a circuit at all times by providing an air conditioner refrigerant pressure adjusting device capable of releasing the refrigerant again, and thereby improving the cooling performance.

In general, as shown in FIG. 1, an air conditioner system employing a dual system includes a front evaporator 10 and a rear evaporator 11, a compressor 12, a condenser 13, a receiver dryer 14, It consists of a front TXV (15) and a rear TXV (16) assigned to each evaporator and a solenoid valve (17). The low pressure line of the gas phase between the evaporator and the compressor, the high pressure line of the gas phase between the compressor and the condenser, the condenser There is a high pressure line in the liquid phase between the front TXV and the front TXV, a low pressure line between the front TXV and the front evaporator, a high pressure line between the condenser and the rear TXV, and a low pressure line between the rear TXV and the rear evaporator.

In such an air conditioning system, the RPM of the compressor is increased due to the adoption of a dual method and an overload (engine RPM rise) operation, and the high pressure side pressure and temperature of the refrigerant are excessively increased. This causes various problems as follows.

First, it is difficult to determine the proper amount of refrigerant in the air conditioning system.

Second, it is optimized by dual air conditioner system and acts as a factor to lower the cooling performance due to pressure rise and condenser temperature rise when only the front air conditioner is operated, and also loss of durability, etc. due to overheating of the compressor is increased.

Third, optimal tuning with a single air conditioner system causes air conditioner performance degradation when operating in dual mode.

Fourth, the pressure change of the refrigerant is severe according to the RPM of the compressor, and if the pressure rises, the performance decreases due to a decrease in durability of the compressor and an increase in temperature of the condenser.

Accordingly, the present invention has been made in view of the above, and when the air conditioner is normally operated or stopped, the inside of the container is set to a low pressure gas phase, and at the time of high pressure, the liquid phase is opened using the opening and closing action of the valve means. By keeping the refrigerant inside the container to maintain the refrigerant pressure at a constant level, it is possible to maintain the optimal cooling performance in dual and single mode and high RPM, as the pressure of the refrigerant is always kept constant It is an object of the present invention to provide an air conditioner refrigerant pressure adjusting device which can achieve the effect of preventing durability deterioration due to overheating and preventing engine cooling performance deterioration due to an increase in condenser temperature.

1 is a schematic diagram showing a typical air conditioning system

Figure 2 is a schematic diagram showing the normal and stop state of the air conditioning refrigerant pressure adjusting device in the air conditioning system including the air conditioning refrigerant pressure adjusting device according to the present invention

3 is a schematic view showing a high pressure state of the air conditioner refrigerant pressure adjusting device in the air conditioning system including the air conditioner refrigerant pressure adjusting device according to the present invention.

<Explanation of symbols for main parts of drawing>

10: front evaporator 11: rear evaporator

12 compressor 13 condenser

14: receiver dryer 15: front TXV

16: rear TXV 17: solenoid valve

18: container 19: spring

20: piston 21: pressure chamber

22 cylinder 23 low pressure line

24: orifice 25: high pressure line

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention provides a front evaporator 10 and a rear evaporator 11, a compressor 12, a condenser 13, and a receiver dryer 14, a front TXV 15 and a rear TXV 16, a solenoid assigned to each evaporator. In the air conditioner system including the valve 17, the piston is connected to both ends of the front TXV (15) via the low pressure line 23 and the high pressure line (25) and selectively opened and closed according to the line pressure of both It is characterized in that it comprises a refrigerant pressure adjusting device for setting the inside of the container in a low pressure gas phase using the position, or when the high pressure action to store the liquid refrigerant in the inside of the container.

In particular, the refrigerant pressure adjusting device has a constant volume and the container 18 is in communication with the both ends of the front TXV (15) line, the position of the vessel 18 is changed by the force of one spring (19) and the other line pressure Piston 20 and spring 19, including a piston 20 for selectively opening and closing both ends of the front side and front TXV 15, and a pressure chamber 21 for applying a line pressure to the piston 20. It is characterized by consisting of a cylinder 22 for receiving.

In addition, an orifice 24 is provided on the low pressure line 23 leading from the vessel 18 side to the front line of the front TXV 15.

This will be described in more detail as follows.

2 and 3 show an air conditioner system including an air conditioner refrigerant pressure adjusting device according to the present invention.

The front evaporator 10 and the rear evaporator 11, the compressor 12, the condenser 13 and the receiver dryer 14, the front TXV 15 and the rear TXV 16, and the solenoid valve 17 Each of the evaporator and the compressor is a low pressure line of the gas phase, the high pressure line of the gas phase between the compressor and the condenser, the liquid high pressure line between the condenser and the front TXV, the low pressure line of the gas phase between the front TXV and the front evaporator, the condenser and the rear In the air conditioner system, which is composed of a gas-liquid high pressure line between the TXV, and a low pressure line between the rear TXV and the rear evaporator, the air conditioner refrigerant pressure adjusting device of the present invention is connected between both ends of the front TXV (15). In this case, by storing the low-pressure gas phase refrigerant or the high-pressure liquid phase refrigerant according to the line pressure state, the overall refrigerant pressure of the circuit is constantly maintained.

To this end, the air conditioner refrigerant pressure regulator is installed in the vessel 18 having a constant volume for the storage of the refrigerant is connected between the both ends of the front TXV (15) by using the low pressure line 23 and the high pressure line (25). And a piston 20 receiving elastic support of the spring 19 and a cylinder 22 including the same, formed on a line leading to the container 18 side, and at the same time, a pressure chamber for supplying line pressure to one side of the cylinder 22. 21 is formed, and the piston 20 has a structure in which flow paths for entering and exiting the refrigerant are formed at both sides.

In addition, the pressure chamber 21 is communicated by a separate line extending from the high pressure line 25, the orifice 24 is provided on the low pressure line (23).

At this time, the orifice 24 serves to vaporize it when the liquid refrigerant in the container 18 is released.

Therefore, looking at the effects of the present invention configured as described above are as follows.

2 shows normal and stopped states of the air conditioner refrigerant pressure regulator.

When stopped, both the low and high pressure lines remain at the same pressure, and the piston sets the spring pressure to open the low pressure line side.

When operating at the normal pressure, the pressure in the high pressure line rises and the pressure in the low pressure line drops, but the piston is set to open the low pressure line side and the inside of the container is in the low pressure gas phase in the same manner as in the normal pressure (250psi).

3 shows a high pressure state of the air conditioner refrigerant pressure regulator.

When the pressure on the high pressure line side rises excessively (greater than 250 psi), the piston closes the low pressure line side and opens the high pressure line side to store the liquid refrigerant in the container, so that the pressure of the refrigerant can be kept constant without increasing.

As described above, the present invention has an advantage of maintaining optimal cooling performance in dual and single mode and high RPM, and also does not increase the pressure of the high-compression refrigerant even when operating the front air conditioner or high RPM only in the dual air conditioning system It can be kept constant and prevents a decrease in durability due to overheating of the compressor, improves the cooling performance of the engine by lowering the temperature rise of the condenser, and prevents unnecessary operation of the compressor by excessive condenser cooling during single mode operation. It can reduce the compressor clutch noise is effective.

Claims (3)

Front evaporator 10 and rear evaporator 11, compressor 12, condenser 13 and receiver dryer 14, front TXV 15 and rear TXV 16, solenoid valve 17 assigned to each evaporator In an air conditioning system comprising: It is installed at both ends of the front TXV 15 through the low pressure line 23 and the high pressure line 25, and the inside of the container is opened at low pressure by using the position of the piston which is selectively opened and closed according to the line pressure of both sides. Refrigerant pressure regulating device, characterized in that it comprises a refrigerant pressure adjusting device to be set, or to store the liquid refrigerant in the container when the high pressure action. 2. The refrigerant pressure regulating device according to claim 1, wherein the refrigerant pressure regulating device has a constant volume and is changed in position by a vessel (18) communicating with both ends of the front TXV (15), and a force of one spring (19) and the other line pressure. And a piston 20 for selectively opening / closing both sides of the vessel 18 side and the front end line side of the front TXV 15, and a pressure chamber 21 for applying a line pressure to the piston 20. Air conditioner refrigerant pressure regulator, characterized in that consisting of a cylinder (22) for receiving the spring (19). 2. An air conditioner refrigerant pressure regulator as set forth in claim 1, characterized in that an orifice (24) is provided on the low pressure line (23) from the vessel (18) side to the front line of the front TXV (15).