KR101013485B1 - Dehumidified dryer for Heat pump - Google Patents

Abstract

The present invention relates to a variable air flow type heat source heat pump dehumidifying dryer, and more particularly, to dehumidify by partially exchanging a part of air circulated in a drying chamber with a refrigerant at low temperature and low pressure in a heat pump to dehumidify it, and then to a high temperature in a condenser of a heat pump. Heat exchanged with the refrigerant under high pressure to be heated and recycled into the drying chamber to ensure the drying efficiency of the dryer and the stability of the heat pump.

The present invention provides a dryer having a drying chamber, a compressor having a compression function with respect to a refrigerant circulating in the drying chamber to perform a drying function of the dryer, a condenser for condensing the refrigerant having a high temperature and high pressure compressed from the compressor, and the condenser. An air heat source heat pump comprising an expansion valve for expanding a high temperature and high pressure refrigerant condensed from an evaporator, and an evaporator and a fan for evaporating the high temperature and high pressure refrigerant expanded from the expansion valve to a low temperature low pressure refrigerant. An auxiliary condenser installed on the flow path connecting the expansion valve and condensing the refrigerant condensed through the condenser first and then an extra amount of heat to the secondary, and installed in the periphery of the auxiliary condenser for heat exchange between the auxiliary condenser and outdoor air. And the condenser and the condenser for heat exchange between the condenser and the evaporator. It is installed between the period is characterized in that the air volume variable type fan of the inverter type to induce the air flow control by varying the air flow in accordance with the set temperature conditions and changes in the drying chamber.

Air Heat Source, Heat Pump, Air Conditioning Cycle, Dehumidifier

Description

Air Heat Source Heat Pump Dehumidification Dryer {Dehumidified dryer for Heat pump}

The present invention relates to a variable air flow type heat source heat pump dehumidifying dryer, and more particularly, to dehumidify by partially exchanging a part of air circulated in a drying chamber with a refrigerant at low temperature and low pressure in a heat pump to dehumidify it, and then to a high temperature in a condenser of a heat pump. Heat exchanged with the refrigerant under high pressure to be heated and recycled into the drying chamber to ensure the drying efficiency of the dryer and the stability of the heat pump.

      In general, as a method of obtaining thermal energy, combustible materials are burned or electric, chemical reactions and reactions are used.

      The methods of obtaining thermal energy by the combustion, action and reaction are used as means for drying, cooling, heating or heating after thermally accumulating the obtained thermal energy in a heat storage device or converting it into a usable state. There is a need for a device for burning combustibles, as well as the generation and emission of environmental pollutants from combustion of combustibles, as the materials must be prepared and also thermal energy must be obtained while burning.

      The method of acquiring thermal energy by electrical and chemical action produces significantly less pollutants than the method of combusting combustible materials, but when it is necessary to obtain a large amount of thermal energy because it requires a material or a device for reaction. Accordingly, there is a problem in that the volume of the device is large, and there is a drawback that the device for this is complicated and enlarged by having safety, and there is a problem that the thermal energy obtained is small compared to the volume of the facility.

      The external heat source and the air heat source heat pump are known to solve the above problems.

      Heat pump is a heat source equipment that absorbs heat from the air and generates compressed gas of high temperature including axial force through compression process in the compressor to raise water temperature or radiate heat exchanged condensation heat to the atmosphere. In the same way as the refrigeration cycle using the heat of evaporation, in contrast to the high temperature maintenance consists of a reverse cycle using the heat of condensation.

       The technique which applied such a heat pump system to a dehumidification dryer is also known.

The outside heat source heat pump type dehumidifying dryer not only decreases the heating efficiency drastically when the outside air temperature drops below freezing in winter, but also requires defrosting operation, and thus requires complicated piping equipment for defrosting operation, and pressure drop due to complicated piping equipment. Furnace system efficiency is lowered, there is a problem that the system efficiency due to the discharge of the wet air and the outside air blowing.

On the other hand, the air heat source heat pump dehumidifying dryer has an advantage that it can be configured as a heat pump system by relatively simple configuration of a compressor, a condenser, an evaporator, an expansion valve, a fan, and a drying method. . It can be divided into batch type and continuous type, and it is divided into hot air and natural drying depending on the presence of dry heat source. The principle of drying by hot air is that the air heated by the heat source is brought into contact with the dry matter to cause heat exchange, and the moisture obtained energy is separated from the dry matter by evaporation and mixed with the air.

As described above, the air heat source heat pump dehumidifying dryer can be relatively simply composed of a compressor, a condenser, an evaporator, an expansion valve, and a fan. However, when the air heat source heat pump system is used, the refrigerant heat exchanged in the primary condenser is sufficiently condensed. If not, there is a problem that can lead to performance degradation of the heat pump.

In addition, the temperature of the refrigerant sucked from the compressor is set to the maximum suction temperature according to the type of the refrigerant, there is a problem that the stability is not secured as a result of damage to the compressor when it exceeds this set temperature value.

Accordingly, an object of the present invention, in the air heat source heat pump dehumidification dryer, the excess amount of heat after the first condensation of the refrigerant through the condenser heat exchange in the auxiliary condenser to fully condense expansion, evaporation, compression, primary condensation, 2 The condensation cycle of the air constitutes an air heat source heat pump so that the drying effect of the dryer is always maintained.

Another object of the present invention, in the air heat source heat pump dehumidifying dryer, system efficiency and stability by varying the air volume according to the set temperature conditions through the installation of the mouth-butter fan to adjust the air volume in accordance with the temperature of the air sucked into the evaporator Is to keep this.

Air heat source heat pump dehumidifying dryer according to the present invention for achieving this object,

A dryer having a drying chamber, a compressor having a compression function with respect to a refrigerant circulating in the drying chamber to perform the drying function of the dryer, a condenser condensing the refrigerant having a high temperature and high pressure compressed from the compressor, and condensed from the condenser. An air heat source heat pump comprising an expansion valve for expanding a high temperature and high pressure refrigerant, an evaporator and a fan for evaporating the high temperature and high pressure refrigerant expanded from the expansion valve and converting the refrigerant into a low temperature low pressure refrigerant,

An auxiliary condenser installed on the flow path connecting the condenser and the expansion valve to condense the excess heat after the first condensation of the refrigerant condensed through the condenser;

A fan installed around the auxiliary condenser for heat exchange between the auxiliary condenser and outdoor air;

It is installed between the evaporator and the condenser for the heat exchange of the condenser and the evaporator is characterized in that the air volume variable type fan of the inverter type to induce the air flow control by varying the air volume according to the set temperature conditions and changes in the drying chamber.

In another aspect, the present invention, a dryer having a drying chamber, a compressor having a compression function for the refrigerant circulating in the drying chamber to perform the drying function of the dryer, a condenser condensing the refrigerant of the high temperature and high pressure compressed from the compressor, An air heat source heat pump comprising an expansion valve for expanding a high temperature and high pressure refrigerant condensed from a condenser, and an evaporator and a fan for evaporating the high temperature and high pressure refrigerant expanded from the expansion valve to a low temperature low pressure refrigerant.

An auxiliary condenser installed on a flow path connecting the condenser and the expansion valve to condense the excess heat after the first condensation of the refrigerant condensed through the condenser;

A fan installed around the auxiliary condenser for heat exchange between the auxiliary condenser and outdoor air;

An inverter type airflow variable fan installed between the evaporator and the condenser for heat exchange of the condenser and the evaporator to induce airflow control by varying airflow;

A pressure sensor may be attached to the suction part of the compressor to control the air flow rate according to the suction pressure sensed by the pressure sensor to control the air flow rate of the variable air flow rate variable fan.

      The fan installed at the periphery of the auxiliary condenser is installed outside the drying chamber, and the variable air volume type fan installed between the evaporator and the condenser is installed inside the drying chamber.

The air heat source heat pump dehumidifying dryer according to the present invention is cooled by dehumidifying and drying by exchanging hot and humid air flowing into the evaporator in a coolant and an evaporator after cooling, and allowing the refrigerant to evaporate by absorbing heat of the wet air. By changing the state of high temperature and high pressure to increase the temperature of the air dried in the condenser and send it to the drying room again to dry the drying, unlike the general dryer system does not supply the warm air to increase the drying effect of the dryer .

In addition, the secondary cooling of the refrigerant through the secondary condenser through the secondary cooling effect to increase the efficiency of the heat pump, by setting the air volume suitable for the drying temperature through the air flow variable fan to maintain the system efficiency and stability There is.

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

1 and 2, the air heat source heat pump dehumidifying dryer according to the present invention includes a dryer 10 having a drying chamber 11 and a drying chamber 11 to perform a drying function of the dryer 10. Compressor 20 having a compression function for the refrigerant circulating in the condenser, a condenser 30 condensing the refrigerant of the high temperature and high pressure compressed from the compressor 20, and expands the refrigerant of the high temperature and high pressure condensed from the condenser 30 Expansion valve 40, and an evaporator 50 and a fan for evaporating the high temperature and high pressure refrigerant expanded from the expansion valve 40 and converting the refrigerant to a low temperature low pressure refrigerant.

The main part is installed on the flow path connecting the condenser 30 and the expansion valve 40, the secondary condenser 70 to condense the extra heat after the first condensation of the refrigerant condensed through the condenser 30 to the second And a fan 60 installed at a periphery of the auxiliary condenser 70 for heat exchange between the auxiliary condenser 70 and the outdoor air, and the circulation air for heat exchange between the condenser 30 and the evaporator 50. It is configured by installing a variable air flow rate fan 80 for inflow. Here, the airflow variable fan 80 is an inverter type fan that operates according to the temperature conditions of the internal circulation air of the drying chamber (11).

In addition, by installing a pressure sensor in the suction portion of the compressor 20 to control the air flow rate of the variable air flow rate variable fan 80 is configured to be controlled. Here, the pressure sensor may be configured to transmit the pressure fluctuation to the air flow variable fan 80 to control the driving of the air flow variable fan.

In the sealed air heat source heat pump dehumidifying dryer, the fan 60 installed at the periphery of the auxiliary condenser 70 is a drying chamber for secondary condensing the refrigerant condensed in the condenser 30 inside the drying chamber 11 with outdoor air. It is preferable to provide outside of (11).

In the sealed air heat source heat pump dehumidifying dryer, a pressure sensor is attached to the suction side of the compressor 20 to adjust the air flow rate of the variable air flow rate fan 80 installed between the evaporator 50 and the condenser 30. The amount of air flow can be controlled or adjusted according to the change in suction pressure.

In the air heat source heat pump dehumidifying dryer according to the present invention configured as described above, a part of air circulated in the drying chamber 11 is heated while being heat-exchanged with a refrigerant at a low temperature and low pressure in the evaporator 50 of the heat pump to dry the chamber 11. It consists of a structure that is recycled into.

Unlike other types of heat pump dehumidifying dryers, the sealed heat pump dehumidifying dryer condenses saturated humid air by dehumidifying the refrigerant in the evaporator 50 without exhausting saturated humid air, compresses the absorbed heat source, and compresses the indoor air again. Warming satisfies both dehumidification and warming simultaneously in a heat pump dryer system, resulting in fuel savings of over 60%.

In order to maintain such a system, a heat pump system design capable of always satisfying refrigerant conditions in the evaporator 50, the condenser 30, and the compressor 20 is required.

As the design conditions, the design of an appropriate amount of air according to the temperature of the air flowing into the evaporator 50 and the design of a secondary auxiliary condenser 70 that can sufficiently discard the remaining amount of condensation heat after the first indoor condensation should be considered. In addition, it requires the design of an inverter-type fan capable of supplying an appropriate amount of airflow.

The present invention is a sealed dehumidifying dryer based on a heating cycle of a heat pump, and the refrigerant discharged at a high temperature from the compressor 20 is first condensed through the condenser 30 in the room to exchange heat with the indoor circulation air. When the temperature exceeds the set temperature, the auxiliary condenser 70 in the outdoors is operated to release the extra heat through the secondary condensation to maintain the heat balance. As the refrigerant is continuously expanded in the expansion valve 40, the coolant heat exchanges with the indoor air heated at high temperature and humidity in the evaporator 50. At this time, the high temperature and high humidity indoor air is discharged to the condensed water and dried, and again heated in the condenser 30 to circulate the room while drying the food or clothing.

In general, an air heat source heat pump is composed of a compressor, a condenser, an evaporator, an expansion valve, and a fan. In the case of such an air heat source heat pump, if the heat-condensed refrigerant primaryly condensed in the condenser is not sufficiently condensed, the heat pump may be degraded. have.

The air heat source heat pump dehumidifying dryer according to the present invention heat-exchanges the amount of excess heat after the first condensation of the refrigerant through the condenser 30 through the secondary condensation in the auxiliary condenser 70 to sufficiently condense. That is, a dehumidifying function is performed in the drying chamber 11 in a cycle of expansion-evaporation-compression-primary condensation-secondary condensation.

In addition, some of the air circulated in the drying chamber 11 is dehumidified while being condensed by heat exchange with a refrigerant of low temperature and low pressure in the evaporator 50 of the heat pump, and is then exchanged with a refrigerant of high temperature and high pressure in the condenser 30 of the heat pump. It is possible to operate in a hermetic structure that is warmed up and recycled into the drying chamber 11.

In addition, since the maximum suction temperature is set according to the type of the refrigerant, the temperature of the refrigerant sucked by the compressor 20 may result in the compressor 20 being damaged when it exceeds this set temperature. It is possible to prevent the damage of the compressor 20 and to ensure cycle stability by inducing the air volume control by mounting the air volume variable fan 80 of the inverter type that adjusts the air volume according to the temperature of the air sucked into the evaporator 50. have.

The present invention condenses the high-temperature and high-pressure refrigerant (R-134a) discharged from the compressor 20 during the drying of the drying through the heating operation of the heat pump in the condenser 30 to the first condensation process after the secondary condenser ( Through heat exchange through the secondary condensation process through 70), the heat pump system efficiency is always improved, and after passing through the expansion valve 40, the heat exchange is performed in the evaporator 50.

In the case of the refrigerant compressor 20, the maximum refrigerant suction temperature is designed to be 20 ° C or less. Therefore, the air volume of the circulating air flowing into the evaporator 50 should be adjusted according to the temperature of the circulating air. At this time, after the heat exchange with the circulating air, the temperature of the refrigerant is maintained at 20 ° C. or lower to be sucked into the compressor 20. do.

If the condition is not satisfied, the compressor 20 may be damaged and the heat pump system may not be operated. Therefore, in the case of the enclosed heat pump dryer, by installing the airflow variable fan 80 to control the airflow volume inside the drying chamber 11, stable system operation is possible, optimal system efficiency can be maintained, and high temperature drying temperature is required. In this case, the system efficiency is increased by subcooling through the auxiliary condenser 70.

The airflow variable type fan 80 installed between the evaporator 50 and the condenser 50 may use an inverter type fan that may induce airflow control by varying the airflow rate according to a set temperature condition and a change. An inverter type fan is a conventional fan having a thermistor and whose operation is controlled according to a change in a set temperature condition.

In addition, the air volume control of the air flow rate variable fan 80 installed between the evaporator 50 and the condenser 30 is attached to the suction side of the compressor 20 by the pressure sensor to change the air flow pressure of the compressor 20 Transfer to the variable fan 80 can control or adjust the air volume.

While the invention has been described in connection with the preferred embodiments, it will be readily apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention, and all such changes and modifications are set forth in the claims. Belongs to the range.

       1 is a block diagram showing a drying cycle configuration of the air heat source heat pump dehumidifying dryer according to the present invention.

       2 is a block diagram of an air heat source heat pump dehumidifying dryer according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: dryer

11: drying chamber

20: compressor

30: condenser

40: expansion valve

50: evaporator

60: fan

70: auxiliary condenser

80: Airflow variable fan

Claims (3)

A dryer having a drying chamber, a compressor having a compression function with respect to a refrigerant circulating in the drying chamber to perform the drying function of the dryer, a condenser condensing the refrigerant having a high temperature and high pressure compressed from the compressor, and condensed from the condenser. An air heat source heat pump comprising an expansion valve for expanding a high temperature and high pressure refrigerant, an evaporator and a fan for evaporating the high temperature and high pressure refrigerant expanded from the expansion valve and converting the refrigerant into a low temperature low pressure refrigerant, An auxiliary condenser installed on a flow path connecting the condenser and the expansion valve to condense the excess heat after the first condensation of the refrigerant condensed through the condenser; A fan installed around the auxiliary condenser for heat exchange between the auxiliary condenser and outdoor air; Air is provided between the evaporator and the condenser for the heat exchange of the condenser and the evaporator is made of an air flow variable type fan of the inverter type to induce the air flow control by varying the air volume according to the set temperature conditions and changes in the drying chamber Heat source heat pump dehumidification dryer. A dryer having a drying chamber, a compressor having a compression function with respect to a refrigerant circulating in the drying chamber to perform the drying function of the dryer, a condenser condensing the refrigerant having a high temperature and high pressure compressed from the compressor, and condensed from the condenser. An air heat source heat pump comprising an expansion valve for expanding a high temperature and high pressure refrigerant, an evaporator and a fan for evaporating the high temperature and high pressure refrigerant expanded from the expansion valve to a low temperature and low pressure refrigerant, An auxiliary condenser installed on a flow path connecting the condenser and the expansion valve to condense the excess heat after the first condensation of the refrigerant condensed through the condenser; A fan installed around the auxiliary condenser for heat exchange between the auxiliary condenser and outdoor air; An inverter type airflow variable fan installed between the evaporator and the condenser for heat exchange of the condenser and the evaporator to induce airflow control by varying airflow; An air heat source heat pump dehumidifying dryer, characterized in that for controlling the air flow rate of the variable air flow rate variable fan attached to the suction part of the compressor to control the air flow in accordance with the suction pressure detected by the pressure sensor.        The method according to claim 1 or 2,        A fan installed at the periphery of the auxiliary condenser is installed outside the drying chamber, and the airflow variable type fan installed between the evaporator and the condenser is installed inside the drying chamber.

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