JPH044719Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a drying device for a dry cleaner having a refrigerator.

[Conventional technology]

FIG. 2 shows a conventional drying device.

Clothes are placed in a processing tank 1, air is circulated by a fan 3, the solvent evaporated from the clothes is condensed and recovered by an evaporator 9, and the air is heated by a first condenser 6 and a heater 4 to become dry air. It consists of

On the other hand, in the refrigeration cycle, the compressor 5 compresses the
The refrigerant, which has become a high-pressure gas, radiates heat and condenses in the first condenser 6 and the second condenser 7. The condensed refrigerant is depressurized by the expansion valve 8, evaporated and absorbs heat by the evaporator 9, and returns to the compressor 5. Dry cleaner operating modes include standby, cleaning, and drying. Waiting is a preparatory stage for work, in which the fan 3 is stopped and the compressor 5 is operated from time to time to prevent the internal pressure within the processing tank 1 from rising.
Washing is a process of washing clothes in the processing tank 1 with a solvent, and although the fan 3 is stopped, the compressor 5 is moved to recover the solvent evaporated in the processing tank 1. Drying is a process of drying the solvent remaining on the clothes in the processing tank 1, and the fan 3 is in operation, and the temperature at the entrance or exit of the processing tank 1 is kept constant by the electric or steam heater 4. controlled.

[Problem that the invention attempts to solve]

In the above-mentioned conventional compressor, if the low pressure is too low, the temperature of the discharged gas will rise, so that the compressor of the refrigerator cannot be operated. If the load is small, the low pressure will drop after a while after operation, and the protective low pressure switch will operate, stopping the compressor 5.

When the process is cleaning or waiting, the fan 3 is stopped and the load on the evaporator 9 is only due to natural convection, so it is extremely small and the low pressure switch is activated immediately. As described above, if the compressor is turned on and off many times, there is a problem that it may cause a malfunction.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a drying device for a dry cleaner in which an evaporator and a condenser of a refrigerator are arranged in this order in a path for circulating air in a processing tank in which clothes are placed. A drying device for a dry cleaner is provided with a bypass circuit having a solenoid valve and a throttle, which guides the discharge gas of the compressor to the inlet, midway, or outlet of the evaporator when the load is light.

[Effect]

With the above configuration, when the load is low, the solenoid valve is opened and the discharged gas is bypassed through the throttle, creating a load. This prevents a drop in the low pressure pressure and prevents the low pressure switch from operating. This can reduce the number of times the compressor is turned on and off. Note that during normal loads, the solenoid valve is closed to form a normal refrigeration cycle.

〔Example〕

An embodiment of the present invention will be described based on FIG.

The configuration of the circulating air system is the same as the conventional one. Further, although the second condenser 7 is illustrated as being water-cooled, it may be air-cooled, and the purpose is to remove heat that cannot be removed by the first condenser 6. Compressor 5
A bypass circuit 12 for bypassing the discharged gas to the inlet of the evaporator 9 is composed of a capillary tube 11 and a solenoid valve 10. In the drying process in which the fan 3 moves, the solenoid valve 10 is closed to form a refrigerant circuit and dry the clothes.

On the other hand, in the cleaning and standby processes that require light loads, the solenoid valve 10 is opened and the capillary tube 1 is opened.
0 to the inlet of the evaporator 9. Even if the discharged gas expands to the pressure of the evaporator, the heating temperature remains
It is about 50deg and becomes a load, so it is possible to prevent a drop in low pressure pressure. Therefore, the low pressure switch does not operate and the compressor does not stop, thereby preventing an increase in the number of starts and stops.

Note that the same function can be achieved even if an orifice is used instead of the capillary tube 11. Further, the discharged gas may be bypassed not at the inlet of the evaporator 9 but at the middle or at the outlet. however,
It is necessary to ensure that the refrigerant is uniform until it reaches the temperature-sensitive cylinder of the expansion valve. Further, the solenoid valve 10 may be opened from the beginning of the standby or cleaning process, or after the low pressure switch is activated.

[Effect of idea]

As described above, according to the present invention, by providing a bypass circuit and bypassing the gas discharged during low load, it is possible to construct a highly reliable device that suppresses the number of times the compressor starts and stops at low cost.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram showing one embodiment of the present invention;
The figure is a configuration diagram of a conventional device. 1... Processing tank, 5... Compressor, 6, 7... Condenser, 8... Expansion valve, 9... Evaporator, 10... Solenoid valve, 11... Capillary tube, 12... Bypass circuit .

Claims (1)

[Scope of utility model registration request] In a drying device for a dry cleaner in which an evaporator and a condenser of a refrigerator are arranged in this order in a path for circulating air in a processing tank in which clothes are placed, discharge gas from a compressor is supplied to the refrigerator when the load is light. A drying device for a dry cleaner, comprising a bypass circuit having a solenoid valve and a throttle that leads to the inlet, midway, or outlet of an evaporator.