JPH0375450A - Refrigeration cycle system - Google Patents

Abstract

PURPOSE:To obtain a highly efficient and low cost refrigeration cycle system by providing the system with a check valve between a vaporizer and a compressor and providing a rotary compressor with a permanent capacitor type driving motor. CONSTITUTION:A check valve 6 is provided between a vaporizer 4 and a compressor 19 and a permanent capacitor type motor is used as the driving motor 20 of the rotary compressor 19. When the rotary compressor 19 starts to operate, the check valve 6 which is a fluid control valve is opened by the pressure of a refrigerant and the compressed refrigerant is circulated constituting a normal refrigeration cycle from a condenser 2 through a capillary tube 3 and a vaporizer 4 to a rotary compressor 19. When the operation of the rotary compressor 19 is stopped, the check valve 6 is closed and the counterflow of a heated high pressure gas toward the vaporizer 4 is obstructed. Thus, a low cost and highly efficient refrigeration cycle system can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a refrigeration cycle A/V stem using a check valve, which is used in household refrigerators and the like.

Prior Art Today, in order to reduce power consumption, the refrigeration cycle systems used in household refrigerators are equipped with highly efficient rolling piston rotary compressors and check valves that prevent high-pressure gas from flowing back into the system. Often used.

Hereinafter, a conventional refrigeration cycle system will be described with reference to the drawings.

The $S diagram above is an example of a refrigeration cycle system used in a household refrigerator, where 1 is a rolling piston type rotary compressor, 2 is a condenser, 3 is a cabillary tube, and 4 is an evaporator. constitutes a cycle. A check valve 6 is provided between the condenser 2 and the rotary compressor 1. The single-phase induction motor of the rotary compressor 1 was driven by a resistance starting capacitor run method (SCR method). 11 is a main winding of the drive motor 10, and 12 is an auxiliary winding.

13 is a normal household AC power supply; 14 is the auxiliary winding 12;
This is an operating capacitor installed between the AC power source 13 and the household AC power source 13. 16 is a PTC relay consisting of a positive characteristic thermistor,
It is provided between the auxiliary winding 12 and the household AC power supply 130.

The primary operation of the above configuration will be explained.

When the rotary compressor 1 starts operating, the check valve 6#J:
The valve is opened by the flow of refrigerant, and the refrigerant compressed by the rotary compressor 1 is transferred from the condenser 2 to the capillary reservoir 3.
→Evaporation word 4 God rotary compressor 1,! : circulates and constitutes a normal refrigeration cycle. In addition, a few seconds after the rotary compressor 1 starts operating, the PTC 1/-16 turns OF.
F, and normal operation begins.

Next, the rotary compressor 1 stops operating, and the check valve 6
is closed to prevent the heated high-pressure gas from flowing back to the evaporator 4.
= be done. Therefore, a gap ε is created to avoid heating of the evaporator 4, and high system efficiency is obtained.

Although there is only one problem that the invention attempts to solve, the rotary
- PTC while the compressor is running! Since the self-heating current continued to flow through the J-ray 16, it became a factor that deteriorated the system efficiency that had been improved. 'Furthermore, the PTCT relay 16, which is unnecessary during normal operation, and crab-like wiring material (not shown) for wiring it are required, which leads to an increase in cost.

In view of the above-mentioned item H, the present invention provides a highly efficient and inexpensive refrigeration cycle system.

Means for Solving the Problems In order to solve the above problems, the refrigeration cycle system of the present invention includes a refrigeration cycle system having a rolling screw type rotary compressor, a condenser, a capillary tube, and an evaporator. /l/ system, a check valve is provided between the evaporator and the compressor, and the rotary compressor is equipped with a permanent condenser drive motor.

Effects The present invention has the above-described configuration, so there is no power consumption corresponding to the self-heating of the PC relay (in addition, there is no need for a PTCT relay and a wiring material for wiring it).

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. Note that parts that are the same as those in the conventional example will be described using the same reference numerals, and groove bottoms and L rollers that operate the same will be omitted.

In Fig. 1, 10 is a rolling screw type rotary compressor, which is a permanent container type (PSCR type).
It is driven by the amount of drive of -ta 2. FIG. 2 is a circuit diagram including the drive motor 20 of the rotary compressor 19.
2 is the main winding of the drive amount ta 2o, and 22 is the auxiliary winding. Reference numeral 13 denotes a normal household AC power supply, and 24 denotes an operating capacitor provided between the auxiliary winding 22 and the household AC power supply 13.

In the above configuration, the operation will be explained next.

When the rotary compressor 19 starts operating, the fluid control valve T
The check valve is opened by the flow of refrigerant, and the coolant compressed by the rotary compressor 19 is circulated to the condenser 2 capillary tube 3o evaporator 4-+q-tary compressor 19, and then the normal Configure the refrigeration cycle.

Next, when the rotary compressor 19 stops operating, the check valve closes to prevent the heated high-pressure gas from flowing back into the evaporator 4.

The heated high-pressure crab 0X is sealed in the p-tally compressor 19 by the check valve 45. Therefore, since there is no pressure difference between the front and rear sides of the rotary compressor, when the rotary compressor 19 resumes its next operation, the start-up load applied to the drive motor 20 is extremely small. Therefore, the rotary compressor 19 can be restarted using the PSCR type drive motor 20, which is generally a single-phase induction motor with a small starting torque/l/r, and the PTCT tray and the wiring materials for wiring them. does not require.

Therefore, conventional PTC! Power consumption equivalent to the self-heating of J Ray is eliminated, and system efficiency is increased.
It is possible to reduce the material cost and assembly labor cost corresponding to the CT Ray and wiring materials.

Effects of the Invention As described above, the present invention 02 is a refrigeration cycle system having a mouth/ring piston type rotary compressor, a condenser, a capillary tube, and an evaporator, between the evaporator and the compressor. By installing a check valve in the rotary compressor, and by equipping the rotary compressor with a permanent capacitor type driving force, the power consumption corresponding to the heat transferred to the FTC relay is eliminated, and the PTC relay is connected to the wiring. This provides a highly efficient and inexpensive refrigeration cycle system that does not require any wiring material.

[Brief explanation of drawings]

Fig. 1 is a system circuit diagram of a refrigeration cycle system showing an embodiment of the present invention, Fig. 2 is a circuit diagram including a drive motor of the embodiment shown in Fig. 1, and Fig. 3 is a system circuit diagram of a conventional refrigeration cycle system. System circuit diagram FIG. 4 is a circuit diagram including the conventional drive motor shown in FIG. 3. 2... Condenser, 3... Capillary tube, 4... Evaporator, 6... Check valve,
19... Rotary compressor, 20...
drive motor.

Claims (1)

[Claims] A refrigeration cycle system comprising a rolling piston type rotary compressor, a condenser, a capillary tube, and an evaporator, wherein a check valve is provided between the evaporator and the compressor, and the rotary compressor A refrigeration cycle system in which the drive motor is a permanent capacitor type motor.