JPS5930868Y2 - refrigeration cycle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refrigeration cycle equipped with a pressure equalization device.

Conventionally, in the refrigeration cycle of an air conditioner, when the operation is stopped, it takes about 3 minutes for the pressures on the high pressure side and the low pressure side to reach an equilibrium state.

Therefore, when starting up again after stopping the operation, it was necessary to wait about 3 minutes before restarting the operation.

Therefore, the present invention provides a refrigeration cycle equipped with a pressure equalization device that can quickly balance the pressure when the operation of the refrigeration cycle is stopped.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. 1 to 4, which illustrate embodiments of the present invention.

FIG. 1 is a refrigeration cycle diagram according to the present invention, in which 1 is a compressor, 2 is a condenser, 3 is a capillary tube, and 4 is an evaporator. Condenser 2. Capillary tube 3. The evaporators 4 are successively connected to form a refrigeration cycle.

Further, 5 is a discharge pipe of the compressor 1, 6 is a high pressure side pipe interposed between the condenser 2 and the capillary tube 3, and 7 is a discharge pipe of the compressor 1.
8 is a low pressure side pipe interposed between the capillary tube 3 and the evaporator 4, 8 is a suction pipe of the compressor, and 9 is a pressure equalization device.

Here, to explain this pressure balance device 9, the second
As shown in the figure, this pressure equalization device 9 has a valve body 10 slidably inserted into its main body, and a branch chamber All and a branch chamber B12 are formed on both sides of the valve body 10.

The subchamber All communicates with the high-pressure side vibro through a pipe 13 and with the capillary tube 3 through a pipe 14.

Further, the branch chamber B12 communicates with the high-pressure side vibro through a pipe 15, and with the low-pressure side pipe 7 through a pipe 16.

Further, the valve body 10 is configured to slide due to the pressure difference between the compartment All and the compartment B12.
When the pressure of B12 is high, the communication state on the side of branch chamber B12 is cut off.

Note that when the pressure in the compartments 11 and 12 is in an equilibrium state, the valve body 10 is designed to fall toward the compartment A11 due to its own weight. The valve body 10 may be located on the side of the branch chamber A11.

FIG. 4 shows another embodiment of this pressure equalization device, 17,
Reference numerals 18 and 19 indicate pedestals for increasing the degree of sealing between the valve body 10 and the main body.

Next, the operation of the present invention will be explained.

First, when the compressor 1 is stopped, that is, the refrigeration cycle is stopped, the pressure equalization device 9 is in the state shown in the third diagram.

When the compressor 1 starts operating in this state, the refrigerant flows as follows at the beginning of the operation.

The refrigerant discharged from the compressor 1 is discharged from the discharge pipe 5. @
Thorough 2. It flows to the high-pressure side vibro, branches into pipe 13 and pipe 15 at the high-pressure side vibro, and enters the pressure equalization device 9.

The refrigerant that enters the branch chamber All of the pressure equalization device from the pipe 13 side passes through the capillary tube 3, and then joins with the refrigerant that has passed through the branch chamber B12 at the low-pressure side pipe 7, and flows into the evaporator 4. It passes through the suction pipe 8 and returns to the compressor 1.

Then, as mentioned above, when the refrigerant power flows 5, the branch room A11
A pressure difference is generated between the subchamber B12 and the subchamber B12, and the valve body 10 operates to shut off the refrigerant passage on the subchamber B12 side as shown in the second diagram.

In other words, the pressure on the branch chamber B12 side is low because the refrigerant is drawn by the compressor 1, and on the other hand, the pressure discharged from the compressor 1 is added to the branch chamber A11 side, resulting in high pressure, so the valve body 10 moves to the branch chamber B12 side, and the pressure is high on the branch chamber A11 side. The refrigerant passage is blocked, the refrigerant passes only through the compartment A11 side, and normal cooling cycle operation is performed.

Further, during this normal cooling cycle operation, since the subcompartment All becomes a space, liquid refrigerant accumulates there and only liquid refrigerant flows toward the pipe 14, so that refrigerant noise is reduced.

Next, a case where the cycle is stopped will be explained.

When the cycle is stopped, the refrigerant pressure in the pipes 13 and 15 branched from the high-pressure side vibro drops.

Therefore, the pressure in the compartment All decreases. On the other hand, the refrigerant pressure in the pipe 16 branched from the low-pressure side pipe 7 increases, and therefore the pressure in the branch chamber B12 increases.

In this way, when the pressure difference between the compartment All and the compartment Bll begins to disappear, the valve body 10 begins to fall due to its own weight.

When the valve body 10 begins to lower, the refrigerant passage on the side of the compartment B12 is opened, and the pressure difference between the discharge pipe 5 and the suction pipe 8 quickly reaches equilibrium.

As described above, in the present invention, since the time required for the refrigerant pressure to reach an equilibrium state is shortened, when a once-stopped cycle is restarted, it can be restarted quickly.

As mentioned above, the refrigeration cycle of the present invention has a valve body inserted into the main body and compartments A on both sides of the valve body.

B, one compartment A communicates with the high pressure side and the capillary tube side, and the other compartment B communicates with the high pressure side and the capillary tube side.
is connected to a high-pressure side and a low-pressure side, respectively, and the valve body is caused to slide due to the difference in pressure between both compartments, so that when the pressure in compartment A is high, the communication state on the side of compartment B is cut off. Since the refrigerant pressure reaches an equilibrium state immediately after the cycle operation is stopped, restarting can be performed immediately after the cycle operation is stopped, which has a great practical effect.

[Brief explanation of the drawing]

Fig. 1 is a diagram of a refrigeration cycle according to the present invention, Figs. 2 and 3 are simplified sectional views of a pressure equalization device provided in the refrigeration cycle of the invention, and Fig. 4 is a simplified sectional view of an embodiment of the invention. . 1: Compressor, 2: Condenser, 3: Capillary tube, 4: Evaporator, 5: Discharge pipe, 6: High pressure side pipe,
7: Low pressure side pipe, 8: Suction pipe, 9: Pressure balance device, 10: Valve body, 11: Branch chamber A, 12: Branch chamber B.

Claims (1)

[Scope of utility model registration request] A refrigeration cycle consisting of a compressor, a condenser, a capillary tube, and an evaporator, in which a valve body is inserted into the main body, and compartments A and B are formed on both sides of the valve body, with one compartment A is communicated with the high pressure side and the capillary tube side, and the other compartment B is communicated with the high pressure side and the low pressure side, respectively, and the pressure in the compartment A is reduced by sliding the valve body due to the difference in pressure between the two compartments. A refrigeration cycle characterized by being equipped with a pressure equalization device that cuts off the communication state on the side of branch chamber B when the pressure is high.