KR100962657B1 - heatpump system and dehumidificating method thereof - Google Patents

Abstract

The present invention relates to a heat pump system of a novel structure that supplies air in accordance with a given condition in a container and maintains it in an optimal state regardless of the outside temperature and climate change by continuous operation without stopping the device.

To this end, the present invention is a compression unit for compressing a refrigerant; An outdoor heat exchange unit used as a condenser in a cooling operation and an evaporator in a heating operation; A chamber having an installation space therein, a first blower that blows outside air into the chamber, and a first blower which is installed sequentially from the air inlet side of the chamber and driven so that the dew point is -10 ° C or lower during dehumidification operation An internal heat exchanger, a second indoor heat exchanger, a third indoor heat exchanger, and a reheater installed on the air outlet side of the third indoor heat exchanger in the chamber to re-raise the air passing through the third indoor heat exchanger; An indoor heat exchanger unit configured for a heat exchanger; An expansion unit for expanding the condensed refrigerant while passing through the heat exchange units; In addition, a heat pump system is provided, comprising: a plurality of refrigerant pipes connected to the compression unit, the outdoor heat exchange unit, the expansion unit, and the indoor heat exchange unit to guide the refrigerant to flow sequentially.

Heat Pump Systems, Cooling Dehumidification, Defrost

Description

Heat pump system and dehumidification operation method using the same {heatpump system and dehumidificating method

The present invention relates to a heat pump system capable of cooling, heating, and dehumidification. More specifically, the present invention provides air for a given condition inside a container regardless of outside temperature and climate change by continuous operation without stopping the device. The present invention relates to a heat pump system having a new structure that maintains an optimal state.

In general, the heat pump system is a device configured to selectively perform the cooling operation and heating operation according to the user's needs, has been applied to various fields.

Recently, the method of using the heat pump system in environmentally friendly energy storage facilities, such as liquefied natural gas or liquefied petroleum gas, which is environmentally friendly and relatively small in pollutants, has been studied and studied in various ways.

That is, in the storage facilities such as liquefied natural gas and liquefied petroleum gas, since the storage temperature of the energy is operated at a very low temperature, it is possible to operate in the above temperature range and to maintain an appropriate temperature and working environment during maintenance work. In order to make it, there is a need for a device capable of simultaneously heating as well as cooling.

However, since the above-described environmentally friendly energy storage facility is operated at a very low temperature (-162 ° C for LNG and -42 ° C for LPG) as described above, when water is introduced, the water freezes and the frozen ice grains are frozen. As the gas moves along with the gas, not only the abnormal operation of the device is caused, but also there is a serious problem that the blockage of the pipe or damage to the piping system is caused.

Accordingly, the heat pump system applied to the environmentally friendly energy storage facility needs a structure capable of completely removing moisture before providing air to the energy storage space, and currently, an adsorption type dehumidifier such as silica gel is usually used. By disposing the pipes between the flowing pipes, the water can be removed from the flowing air.

However, considering the need for frequent replacement of the water absorbent has caused a problem of increased cost according to the maintenance.

In particular, since the water absorbent is applied as a factor to hinder the flow of air, the air provided to the adsorption type dehumidifier is an air of high pressure generated by a large-capacity air compressor. Occurred.

In addition, the temperature does not rise above -10 ° C, for example, when purging nitrogen tanks for new installations of environmentally friendly energy storage facilities or for maintenance work. Accordingly, the dehumidified air must be provided in the tank at 80 ° C. or higher so that the work by the worker can be stably performed.

However, in the process of providing the dehumidified air of 80 ° C. or higher in the tank, the air must be passed through the above-described adsorption dehumidifier and then supplied with a separate electric heater to increase the temperature. Since a proper pressure must be maintained, a separate pressure reducing device must be installed to reduce the high pressure air passing through the adsorption dehumidifier.

Accordingly, due to the pressure decrease by the pressure reducing device described above, the temperature drop of the supply air is inevitably generated, and in order to maintain the temperature in the space where the energy storage facility is installed, the required power of the electric heater is higher than the appropriate temperature. There is a problem that this must be further increased.

The present invention has been made to solve the various problems according to the prior art described above, the object of the present invention is to allow the air cooling operation, heating operation and dehumidification operation to be selectively carried out according to the type and load of the storage facility air Water in the air can be completely removed, and the required power of the electric heater can be reduced as much as possible. In particular, during the dehumidification operation, the dew point is set to -10 ° C or lower, thereby providing a new type of cooling and heating and To provide a dehumidifying heat pump system and an indoor side heat exchanger applied thereto, and a dehumidification operation method using the same.

According to the heat pump system of the present invention for achieving the above object a compression unit for compressing a refrigerant; An outdoor heat exchange unit used as a condenser in a cooling operation and an evaporator in a heating operation; A chamber for guiding the flow of air while having an installation space therein, a first blower provided at the air inlet side of the chamber to blow external air into the chamber, and an inlet of the outside air in the chamber The first indoor heat exchanger, the second indoor heat exchanger, and the third indoor heat exchanger, which are sequentially installed and driven to have a dew point of -10 ° C. or lower during the dehumidification operation, and the air of the third indoor heat exchanger in the chamber. An indoor heat exchanger unit installed at an outlet side and configured to reheat the air passing through the third indoor heat exchanger; An expansion unit for expanding the refrigerant condensed while passing through the outdoor heat exchange unit or the indoor heat exchange unit, and providing the refrigerant to the indoor heat exchange unit or the outdoor heat exchange unit; And a plurality of refrigerant pipes connected to the compression unit, the outdoor heat exchange unit, the expansion unit, and the indoor heat exchange unit to guide the refrigerant to flow sequentially.

Here, the first indoor heat exchanger lowers the temperature of the outside air introduced through the first blower to 5 ° C, and the second indoor heat exchanger reduces the temperature of the air passing through the first indoor heat exchanger. The evaporation temperature is determined to remove water in the air while lowering to 0 ° C., and the third indoor heat exchanger lowers the temperature of the air passing through the second indoor heat exchanger to below -10 ° C. to minimize the occurrence of frost. Thereby determining the evaporation temperature to dehumidify.

In addition, the air outlet side of the chamber is branched into a plurality of pipelines, characterized in that any one of the pipelines further comprises a second blower for increasing the pressure of the discharged air.

In addition, it is provided on the air outlet side in the chamber, characterized in that further comprises a heater unit for selectively heating the air passing through the indoor heat exchange unit.

In addition, the outdoor heat exchange unit is characterized by comprising two heat exchangers, during the dehumidification operation of any one of the two heat exchangers of the outdoor heat exchange unit is used as a condenser and the other heat exchanger to the evaporator Characterized in that it is used.

In addition, according to the heat exchange device of the indoor side of the heat pump system of the present invention for achieving the above object, the chamber having an installation space therein to guide the flow of air; A first blower provided at an air inlet side of the chamber and blowing outside air into the chamber; A first indoor heat exchanger, a second indoor heat exchanger, and a third indoor heat exchanger, which are sequentially installed from an inflow side of the outside air in the chamber and are driven to have a dew point of -10 ° C. or lower during a dehumidification operation; And a reheat heat exchanger installed at an air outlet side of the third interior heat exchanger in the chamber and re-raising the air passing through the third interior heat exchanger.

Here, the first indoor heat exchanger lowers the temperature of the outside air introduced through the first blower to 5 ° C, and the second indoor heat exchanger reduces the temperature of the air passing through the first indoor heat exchanger. It is configured to remove the moisture in the air while lowering to 0 ℃, the third indoor heat exchanger lowers the temperature of the air passing through the second indoor heat exchanger to -10 ℃ or less to minimize the occurrence of dehumidification It is characterized in that it is configured to.

In addition, the air outlet side of the chamber is branched into a plurality of pipelines, characterized in that any one of the pipelines further comprises a second blower for increasing the pressure of the discharged air.

In addition, it is provided on the air outlet side in the chamber, characterized in that further comprises a heater unit for selectively heating the air passing through the indoor heat exchange unit.

And, according to the dehumidification operation method of the heat pump system of the present invention for achieving the above object a first step of compressing the refrigerant through a compression unit; Some of the compressed refrigerant is condensed by passing through the first outside heat exchanger, and some of the refrigerant is condensed by passing through the second outside heat exchanger, and some of the refrigerant is passed through the heat exchanger for reheating. To condense; A third step of expanding the condensed refrigerant; Providing the expanded refrigerant to a first indoor heat exchanger, a second indoor heat exchanger, and a third indoor heat exchanger to control the dew point to be operated at -10 ° C or lower while evaporating the expanded refrigerant; The first blower is operated while each of the above steps is performed to control the external air to sequentially pass through the first indoor heat exchanger, the second indoor heat exchanger, the third indoor heat exchanger, and the reheat heat exchanger. Step 5: including the progress.

Here, the fourth step is to provide the expanded refrigerant to the first indoor heat exchanger to control and dehumidify while operating to a temperature of 5 ℃, and providing the expanded refrigerant to the second indoor heat exchanger And a second dehumidification step of controlling and dehumidifying to operate at a temperature of 0 ° C., and a cooling dehumidification step of controlling and dehumidifying while operating at a temperature of -10 ° C. or less by providing the expanded refrigerant to a third indoor heat exchanger. It is characterized by.

The method may further include a temperature compensation step of sensing a temperature of the air passing through the reheat heat exchanger through the fifth step and generating a heater to compensate the air to reach the set temperature when the temperature does not reach the set temperature. It is characterized by the progress.

The defrosting operation may further include a step of performing a defrosting operation during each of the above-described steps, and the defrosting operation may include stopping the operation of the first blowing unit and the second blowing unit, and the first outdoor unit. The side heat exchanger and the third indoor heat exchanger are operated to act as a condenser, and the second outdoor heat exchanger is operated by controlling the flow direction of the refrigerant to act as an evaporator, and the first indoor heat exchanger and the second indoor side Refrigerant circulation to the heat exchanger and the reheating heat exchanger is characterized in that the process including controlling each of the solenoid valve to be stopped.

As described above, the heat pump system of the present invention, the indoor heat exchanger applied thereto, and the dehumidification operation method using the same have the effect of dehumidification operation as well as cooling and heating.

In particular, since the dew point for the dehumidification operation is configured to proceed below -10 ° C and controlled, it has the effect that complete dehumidification of the air is possible.

In addition, ice may be generated in each indoor heat exchanger as the dehumidification operation is performed at subzero temperature, but the evaporation temperature of the first indoor heat exchanger is set to 5 ° C., and the evaporation temperature of the second indoor heat exchanger is Since it is set to 0 ° C., the operation of -10 ° C. or less is performed in a state where constant moisture is removed from the air, so that the occurrence of implantation can be minimized.

Hereinafter, a preferred embodiment of the heat pump system of the present invention and the indoor heat exchange unit applied thereto will be described with reference to FIGS. 1 to 7.

Heat pump system according to an embodiment of the present invention is largely as shown in Figure 1 attached to the compression unit 100, the outdoor side heat exchange unit 200, the indoor side heat exchange unit 300, the expansion unit 400 and a plurality The refrigerant pipe is configured to include.

Of course, the compression unit 100, the outdoor side heat exchange unit 200, the indoor side heat exchange unit 300, the expansion unit 400, and the plurality of refrigerant pipes are also provided in the existing general heat pump system. to be.

However, in the embodiment of the present invention, the indoor heat exchange unit 300 of the above-described configuration is not only cooling and heating but also operation for dehumidification and the dehumidification can be carried out at sub-zero temperatures so that moisture in the air While it can be completely eliminated while the occurrence of the idea is minimized, and other technical configuration for this is also characterized by being configured to enable the above-described action.

In this regard, with reference to the accompanying Figures 1 to 7 will be described in more detail for each technical configuration as follows.

First, the compression unit 100 is a compressor built in a conventional heat pump system, and is an apparatus for compressing a refrigerant.

Next, the outdoor heat exchange unit 200 is a device used as a condenser during the cooling operation, and used as an evaporator during the heating operation.

In the exemplary embodiment of the present invention, the outdoor heat exchange unit 200 is provided as two heat exchangers 210 and 220 as shown in FIGS. 1 and 2, and particularly, the two heat exchangers ( The heat exchanger of any one of 210 and 220 (hereinafter referred to as "first external heat exchanger") 210 is used as a condenser and the other heat exchanger (hereinafter referred to as "second external heat exchanger"). 220 is configured for use as an evaporator.

In this case, the first outside heat exchanger 210 and the second outside heat exchanger 220 are used as a condenser during the cooling operation and two heat exchangers 210 and 220 during the heating operation according to the operating conditions or other needs. ) All or only one heat exchanger may be set to be used as the evaporator.

Next, the indoor heat exchange unit 300 is a device used as an evaporator during the cooling operation is used as a condenser during the heating operation.

In the embodiment of the present invention, the indoor heat exchange unit 300 is configured to allow the dehumidification operation to proceed below the sub-zero temperature so that moisture can be completely removed from the air provided to the space where the cryogenic energy is stored. present.

To this end, the indoor heat exchange unit 300 according to the embodiment of the present invention is the chamber 310, the first blower 320, the first indoor heat exchanger 330 and the second indoor heat exchanger ( 340 and the third interior heat exchanger 350 and the reheat heat exchanger 360 are shown.

This will be described in more detail with reference to FIG. 3.

First, the chamber 310 is configured to form the exterior of the indoor heat exchange unit 300, and is formed as a tube for guiding the flow of air while having an installation space therein.

The first blower 320 is a blower provided at the air inlet side of the chamber 310 to blow external air into the chamber 310.

The first indoor heat exchanger 330, the second indoor heat exchanger 340, and the third indoor heat exchanger 350 are sequentially provided from the side into which the outside air is introduced into the chamber 310. It is a heat exchanger that is installed so that the dew point is -10 ℃ or lower during the dehumidification operation.

In this case, the first indoor heat exchanger 330 lowers the temperature of the outside air introduced through the first blower 320 to 5 ° C, and the second indoor heat exchanger 340 is It is configured to remove moisture in the air while lowering the temperature of the air passing through the first indoor heat exchanger 330 to 0 ° C.

In addition, the third indoor heat exchanger 350 is configured to operate at a temperature of -10 ° C or less.

The evaporation temperature of the first indoor heat exchanger 330 and the second indoor heat exchanger 340 is determined so that the temperature of the air can be sequentially lowered to 0 ° C., which is the two heat exchangers 330 and 340. Is achieved by providing pressure regulating valves respectively on the refrigerant outlet side conduits.

Since the dew point of the dehumidification operation is operated at -10 ° C. or less, the configuration of each indoor heat exchanger 330, 340, 350 is less than -10 ° C., so that ice may be generated in each indoor heat exchanger 330, 340, 350. Through the air 330 and the second indoor heat exchanger 340, the primary and secondary dehumidification is performed in the state before ice is frozen and then dehumidified at sub-zero temperatures, so that each of the indoor heat exchangers 330, 340, 350 This is to minimize the occurrence of implantation.

The reheat heat exchanger 360 is a heat exchanger that heats the air that has passed through the third indoor heat exchanger 350 to rise again.

In this case, the reheat heat exchanger 360 is provided on the air outlet side of the third internal heat exchanger 350 in the internal space of the chamber 310.

Meanwhile, in the embodiment of the present invention, the air outlet side of the chamber 310 is configured to be branched into a plurality of pipes 311 and 312 among the components constituting the indoor heat exchange unit 300 as shown in FIGS. 1 and 3. Presents additionally.

This is to allow the air to be selectively provided to a space in communication with the branched pipes 311 and 312 according to the use of the air passing through the indoor heat exchange unit 300.

Of course, dampers 313 and 314 capable of opening and closing control are provided in the above-described conduits 311 and 312, respectively, to selectively close the conduits.

In addition, any one of the pipe lines 311 and 312 described above is configured to further include a second blower 370 for increasing the pressure of the discharged air. The second blower 370 is configured to increase the actual air temperature by increasing the pressure of the air passing through the indoor heat exchange unit 300 during the dehumidification operation.

In this case, the second blower 370 is preferably used as a Roots Blower.

In addition, in the embodiment of the present invention, the heater unit 380 for selectively heating air to the air outlet side portion of the reheat heat exchanger 360 which is the air outlet side in the chamber 310 of the interior space of the chamber 310. ) Is further included.

At this time, the heater unit 380 is a series of configurations for increasing the temperature of the air while selectively generating heat by electrical control.

Next, the expansion parts 410, 420, 430, 440, 450, and 460 expand the condensed refrigerant while passing through the outdoor heat exchange unit 200 or the indoor heat exchange unit 300 to expand the indoor heat exchange unit 300 or the outdoor heat exchange unit. 200 is a configuration provided.

Next, the plurality of refrigerant pipes are connected between the compression unit 100, the outdoor side heat exchange unit 200, the indoor side heat exchange unit 300, and the expansion units 410, 420, 430, 440, 450 and 460 as shown in FIGS. 1 to 3. Is a tube to guide the flow in order.

Each of the refrigerant pipes is connected between the components to enable selective operation of the cooling operation, the heating operation and the dehumidification operation.

In this case, each of the refrigerant pipes is a first refrigerant pipe 501 connecting the refrigerant outlet side of the compression unit 100 and the refrigerant inlet side of the first outdoor side heat exchanger 210 and the compression unit 100 The second refrigerant pipe 502 connecting the refrigerant outlet side and the refrigerant inlet side of the second outside heat exchanger 220, and the refrigerant outlet side of the compression unit 100 and the third interior heat exchanger 350, respectively. A third refrigerant pipe 503 connecting the refrigerant inlet side, a fourth refrigerant pipe 504 connecting the refrigerant outlet side of the compression unit 100 and the refrigerant inlet side of the reheat heat exchanger 360, and A fifth refrigerant pipe 505 which connects the refrigerant outlet side of the first outside heat exchanger 210 and the refrigerant inlet side of the compression unit 100, and the refrigerant outlet side of the second outside heat exchanger 220; The sixth refrigerant pipe 506 connecting the refrigerant inlet side of the compression unit 100 and the refrigerant outlet side and the first interior side of the first outside heat exchanger 210 and the second outside heat exchanger 220. Cold of the heat exchanger 330 The seventh refrigerant pipe 507 connecting the inlet side and the refrigerant outlet side of the first outside heat exchanger 210 and the second outside heat exchanger 220 and the second inside heat exchanger 340. The eighth refrigerant pipe 508 connecting the refrigerant inlet side, the refrigerant outlet side of the first outside heat exchanger 210 and the second outside heat exchanger 220 and the third inside heat exchanger 350 A ninth refrigerant pipe 509 connecting the refrigerant inlet side, a tenth refrigerant pipe 510 connecting the refrigerant outlet side of the first indoor heat exchanger 330 and the refrigerant inlet side of the compression unit 100, The 11th refrigerant pipe 511 which connects the refrigerant | coolant outflow side of the 2nd interior heat exchanger 340, and the refrigerant | coolant inflow side of the compression unit 100, and the refrigerant | coolant outflow side and compression of the 3rd indoor heat exchanger 350 are compressed. A twelfth refrigerant pipe 512 connecting the refrigerant inlet side of the unit 100 and a thirteenth refrigerant pipe 513 connecting the refrigerant outlet side of the reheat heat exchanger 360 and the refrigerant inlet side of the compression unit 100. ), And the reheat heat exchanger 360 Fourteenth refrigerant pipe 514 connecting the refrigerant outlet side and the refrigerant inlet side of the first outside heat exchanger 210, the refrigerant outlet side and the second outside heat exchanger 220 of the reheat heat exchanger (360) It is configured to include a fifteenth refrigerant pipe 515 connecting the refrigerant inlet side.

In particular, each of the refrigerant pipes 501 to 515 is provided with a plurality of solenoid valves for selectively blocking or controlling the flow rate, the back flow, the pressure, or the flow of the refrigerant, and a pressure sensor for sensing the pressure of the refrigerant. do. At this time, the reference numerals of the drawings for the respective solenoid valve and the pressure sensor will be selectively written and described as necessary.

In addition, the expansion parts 410 to 460 may include the seventh refrigerant pipe 507, the eighth refrigerant pipe 508, and the ninth refrigerant of each of the refrigerant pipes 501 to 515, as shown in FIGS. 2 and 3. The pipe 509 and the fourteenth refrigerant pipe 514 and the fifteenth refrigerant pipe 515 are provided on the refrigerant outlet side, respectively.

Operation control of the heat pump system of the present invention as described above is provided to the plurality of temperature sensors (301, 302, 303, 304) provided in the indoor heat exchange unit 300 and the compression unit 100 of the refrigerant pipes (501 to 515), respectively. The controller (not shown) controls the solenoid valve and the device by the signals of the installed pressure sensors 101 and 102.

On the other hand, reference numeral 610 is a receiver.

In the following, the operation control process of the heat pump system according to an embodiment of the present invention and the operation due to this control will be described.

First, the control process and action for the cooling operation will be described with reference to FIG. 4.

First, when a desired temperature for cooling is set according to a user's needs, a cooling operation according to the set desired temperature is performed.

In this case, the refrigerant compressed through the compression unit 100 is provided to the first outdoor heat exchanger 210 through the first refrigerant pipe 501 and the second outdoor heat exchanger is provided through the second refrigerant pipe 502. And each condensed to the gas 220, and subsequently passes through the receiver 610, and then passes through the seventh refrigerant pipe 507, the eighth refrigerant pipe 508, and the ninth refrigerant pipe 509. It is provided to the side heat exchanger 330, the second indoor heat exchanger 340 and the third indoor heat exchanger 350, respectively.

At this time, the reheat heat exchanger 360 is used as a condenser that condenses after receiving the compressed refrigerant from the compression unit 100 through the fourth refrigerant pipe 504, and passes through the reheat heat exchanger 360. The condensed refrigerant flows through the seventh refrigerant 507 tube, the eighth refrigerant tube 508, and the ninth refrigerant tube 509 through the receiver 610.

The refrigerant flowing through the seventh refrigerant pipe 507, the eighth refrigerant pipe 508, and the ninth refrigerant pipe 509 is expanded while passing through the expansion portions 410, 420, 430 provided in the refrigerant pipes 507, 508, 509. And then provided to the first indoor heat exchanger 330, the second indoor heat exchanger 340, and the third indoor heat exchanger 350, respectively.

Therefore, the outside air blown into the chamber 310 by the operation of the first blower 320 constituting the indoor heat exchange unit 300 is heat exchanged with the first indoor heat exchanger 330 and the second indoor heat exchanger. The heat is sequentially cooled with the refrigerant passing through the air 340 and the third indoor heat exchanger 350.

In this case, the first indoor heat exchanger 330, the second indoor heat exchanger 340 and the third indoor heat exchanger 350 are set to operate at a dew point lower than the room temperature set by the user. The air passing through each of the indoor side heat exchangers 330, 340, 350 achieves a temperature of minus zero.

However, the air cooled while passing through each of the indoor side heat exchangers 330, 340, and 350 is heated up to a temperature set by the user while being heat-exchanged with the refrigerant passing through the reheat heat exchanger 360, and then the air outlet side of the chamber 310. It is discharged to the room through the air to cool the room to a set temperature range.

If the air raised while passing through the reheat heat exchanger 360 is still at a lower temperature than the set temperature, the operation of the heater 380 installed at the air outlet side of the chamber 310 is performed while the air is Heated to achieve a set temperature range.

In this case, the temperature measurement of the blowing air is installed adjacent to the second indoor heat exchanger 340 and the third indoor heat exchanger 350, the reheat heat exchanger 360, and the heater 380. It consists of sensing by a plurality of temperature sensors (301, 302, 303, 304).

Of course, the operation control of the heater unit 380 may not be performed according to the condition of the user's temperature setting.

Next, the control process and action for the heating operation will be described with reference to the accompanying FIG.

First, when a desired temperature for heating is set according to a user's need, heating operation according to the set desired temperature is performed.

In this case, the refrigerant compressed through the compression unit 100 is provided to the reheat heat exchanger 360 through the fourth refrigerant pipe 504 to condense while passing through the reheat heat exchanger 360.

In addition, the refrigerant condensed while passing through the reheat heat exchanger 360 flows through the thirteenth refrigerant pipe 513 and passes through the receiver 610, followed by a fourteenth refrigerant pipe 514 and a fifteenth refrigerant pipe. Flows through 515.

Subsequently, the refrigerant flowing through the fourteenth refrigerant pipe 514 and the fifteenth refrigerant pipe 515 expands while passing through the expansion parts 450 and 460 provided on the refrigerant outlet side of each of the refrigerant pipes 514 and 515. And then provided to the first outside heat exchanger 210 and the second outside heat exchanger 220, respectively.

That is, in the heating operation, the reheat heat exchanger 360 is used as a condenser, and the first outside heat exchanger 210 and the second outside heat exchanger 220 are used as evaporators.

At this time, the refrigerant is not flowed into the first indoor heat exchanger 330, the second indoor heat exchanger 340, and the third indoor heat exchanger 350.

Therefore, the outside air blown into the chamber 310 by the operation of the first blower 320 constituting the indoor heat exchange unit 300 is heated while heat exchanged with the refrigerant passing through the reheat heat exchanger 360. And then discharged into the room through the air outlet side of the chamber 310.

If the temperature of the air heat-exchanged while passing through the reheat heat exchanger 360 is lower than the room temperature set by the user, the air is heated to achieve a set temperature range through the operation control of the heater 380. Done.

Of course, during the heating operation, the second outdoor heat exchanger 220 may be substantially controlled to perform the role of the evaporator by preventing the flow of the refrigerant to the first outdoor heat exchanger 210. The first outdoor heat exchanger 210 is set to be used alternately with the second outdoor heat exchanger 220 as necessary (for example, defrosting operation).

Next, a control process and action for the dehumidification operation will be described with reference to FIG. 6.

The dehumidification operation is an operation for providing air at a temperature of approximately 60 ° C. to 80 ° C. to the space where the air is provided, and at the same time, to completely remove moisture from the air. It is used to provide dehumidified air into the storage facility during maintenance work.

The dehumidification operation proceeds by setting the desired temperature and pressure according to the needs of the user (if necessary, the dew point may be additionally set).

That is, when the desired temperature and pressure are set by the user, the controller controls the control of the capacity control valves 103 and 104 provided in the compression unit 100 based on the pressure sensed by the pressure sensors 101 and 102 connected to the compression unit 100. The pressure is maintained, and selective operation control of each solenoid valve and heater unit 380 is performed through the temperature sensors 301 to 304 provided in the indoor heat exchange unit 300.

This will be described in more detail as follows.

First, a portion of the refrigerant gas compressed through the compression unit 100 passes through the first refrigerant pipe 501 and the pressure regulating valve 701 sequentially and is provided to the first outside heat exchanger 210 to condense. The other part of the refrigerant gas is provided to the second outside heat exchanger 220 while condensing through the second refrigerant pipe 502 and the pressure regulating valve 702, and the remaining part of the refrigerant gas is the fourth. It is provided to the reheat heat exchanger 360 through the refrigerant pipe 504 to condense.

Then, the condensed refrigerant passes through the receiver 610 through the liquid recovery pipe 516 and then through the seventh refrigerant pipe 507, the eighth refrigerant pipe 508 and the ninth refrigerant pipe 509. The first chamber heat exchanger 330, the second chamber heat exchanger 340, and the third chamber heat exchanger 350 are respectively provided.

At this time, the refrigerant is expanded in the process of passing through the expansion portion (410, 420, 430) provided on the refrigerant outlet side of the seventh refrigerant pipe 507, the eighth refrigerant pipe 508 and the ninth refrigerant pipe 509, and then Evaporation occurs while passing through the first indoor heat exchanger 330, the second indoor heat exchanger 340, and the third indoor heat exchanger 350.

Thereafter, the refrigerant passing through the first indoor heat exchanger 330, the second indoor heat exchanger 340, and the third indoor heat exchanger 350 may include the tenth refrigerant pipe 510 and the eleventh refrigerant pipe ( 511 and the twelfth refrigerant pipe 512 and then re-introduced into the compression unit 100 through the liquid separator 110 is repeated iteration.

In this case, the first indoor heat exchanger 330 and the second indoor heat exchanger 340 are controllers based on the temperature sensed by the air outlet side temperature sensor 301 of the second indoor heat exchanger 340. While the selective control of each solenoid valve of the operation is made, the third indoor heat exchanger 350 is made to selectively control the solenoid valve of the controller based on the temperature sensed by the air outlet side temperature sensor 302. The heat exchanger 360 for reheating is operated with selective control of the solenoid valve of the controller based on the temperature sensed by the air outlet side temperature sensor 303, and the heater unit 380 operates the air. The controller is operated with selective control of the controller based on the temperature sensed by the outlet temperature sensor 304.

In particular, the first indoor heat exchanger 330 of the indoor heat exchanger (330, 340, 350) is operated by the evaporation temperature is set to 5 ℃, the second indoor heat exchanger 340 is set to the evaporation temperature 0 ℃ And the third chamber heat exchanger 350 is operated with a dew point set to -10 ° C.

Therefore, the outside air blown into the chamber 310 by the operation of the first blower 320 constituting the indoor heat exchange unit 300 passes through the first indoor heat exchanger 330. The first dehumidification is performed while heat-exchanging with the first indoor heat exchanger 330, and the second dehumidification is performed while heat-exchanging with the second indoor heat exchanger 340 during the passage of the second indoor heat exchanger 340. This is done.

In particular, the air dehumidified while passing through the first indoor heat exchanger 330 and the second indoor heat exchanger 340 passes through the third indoor heat exchanger 350. The heat and heat exchange with the 350, so the cooling and dehumidification is carried out at sub-zero temperature, the moisture contained in the air is completely removed.

In addition, the air passing through the third indoor heat exchanger 350 is re-heated while being heat-exchanged with the reheat heat exchanger 360 while passing through the reheat heat exchanger 360.

At this time, the temperature rising by the heat exchange with the reheat heat exchanger 360 is a predetermined state, but the air passes through the third indoor heat exchanger 350 to achieve a subzero temperature, so the heat exchanger 360 for reheating Even if it passes, it may not reach the preset temperature.

Accordingly, when the air does not reach the preset temperature through the temperature sensor 303 installed on the air outlet side of the reheat heat exchanger 360, the temperature of the air through the heat generation control of the heater unit 380. Compensate to reach a preset temperature.

At this time, the control of the heating of the heater unit 380 is performed based on the temperature detected from the temperature sensor 304 installed on the air outlet side of the heater unit 380.

As described above, the air that has risen to a predetermined temperature while passing through the heater unit 380 is indoors in a state where the pressure is increased by driving of the second blower unit 370 installed on the air outlet side of the chamber 310. Inside the environment-friendly energy storage facility).

In this case, when the air blown by the second blower 370 is further increased in temperature due to an increase in pressure, power consumption for heat generation of the heater 380 for temperature compensation, which is the previous step, is minimized. Can be.

Meanwhile, the dehumidification operation described above requires periodic defrosting because the third indoor heat exchanger 350 is operated at −10 ° C. or lower.

During operation for defrosting, the operation of the first blower 320 and the second blower 370 is stopped as shown in FIG. 7, and the first outside heat exchanger 210 and the third inside heat exchanger are stopped. The 350 is operated to act as a condenser and at the same time the second outdoor heat exchanger 220 controls and operates the flow direction of the refrigerant to act as an evaporator.

Of course, at this time, the solenoid valves are controlled to stop the refrigerant circulation to the first indoor heat exchanger 330, the second indoor heat exchanger 340, and the reheat heat exchanger 360. This is because the first indoor heat exchanger 330 and the second indoor heat exchanger 340 do not generate ice because the evaporation temperature is determined based on the temperature of the image.

When the defrosting operation is completed, the control is performed to perform the normal dehumidification operation again as described above.

1 is a schematic diagram illustrating the overall configuration of a heat pump system according to a preferred embodiment of the present invention.

FIG. 2 is a schematic diagram illustrating the structure of a compression unit and an outdoor heat exchange unit of a heat pump system according to an exemplary embodiment of the present invention.

3 is a schematic diagram illustrating the structure of an indoor heat exchange unit of a heat pump system according to a preferred embodiment of the present invention;

4 is a schematic configuration diagram illustrating an operating state during a cooling operation of a heat pump system according to an exemplary embodiment of the present invention.

5 is a schematic configuration diagram illustrating an operation state during heating operation of a heat pump system according to a preferred embodiment of the present invention;

6 is a schematic configuration diagram illustrating an operation state during dehumidification operation of a heat pump system according to an exemplary embodiment of the present invention.

FIG. 7 is a schematic configuration diagram illustrating an operation state during defrosting in a dehumidifying operation process of a heat pump system according to an exemplary embodiment of the present invention.

Explanation of symbols for main parts of the drawings

100. Compression unit 110. Liquid separator

200. Outdoor Heat Exchanger 210. First Outdoor Heat Exchanger

220. Second outdoor heat exchanger 300. Indoor side heat exchanger unit

301-304. Temperature sensor 310. chamber

320. First blower 330. First indoor heat exchanger

340. Second indoor heat exchanger 350. Third indoor heat exchanger

360. Heat exchanger for reheat 370. Second blower

380. Heater 410 ~ 460. Inflation

501-515. Refrigerant line 610.

Claims (15)

A compression unit for compressing the refrigerant; An outdoor heat exchange unit used as a condenser in a cooling operation and an evaporator in a heating operation; A chamber for guiding the flow of air while having an installation space therein, a first blower provided at the air inlet side of the chamber to blow external air into the chamber, and an inlet of the outside air in the chamber The first indoor heat exchanger, the second indoor heat exchanger, and the third indoor heat exchanger, which are sequentially installed and are respectively driven such that the dew point is -10 ° C. or lower during the dehumidification operation, and the third interior of the chamber An indoor heat exchanger unit installed at an air outlet side of the heat exchanger and configured to re-raise the air passing through the third indoor heat exchanger; An expansion unit for expanding the refrigerant condensed while passing through the outdoor heat exchange unit or the indoor heat exchange unit, and providing the refrigerant to the indoor heat exchange unit or the outdoor heat exchange unit; And, And a plurality of refrigerant pipes connected to the compression unit, the outdoor heat exchange unit, the expansion unit, and the indoor heat exchange unit to guide the refrigerant to be sequentially flowed. The method of claim 1, The first indoor heat exchanger lowers the temperature of the outside air introduced through the first blower to 5 ° C, and the second indoor heat exchanger reduces the temperature of the air passing through the first indoor heat exchanger at 0 ° C. The evaporation temperature is determined to remove moisture from the air while lowering to, The third indoor heat exchanger heat pump system, characterized in that the evaporation temperature is determined to dehumidify by lowering the temperature of the air passing through the second indoor heat exchanger to less than -10 ℃ to minimize the occurrence of frost. The method of claim 1, The air outlet side of the chamber is branched into a plurality of conduits, The heat pump system, characterized in that any one of the pipe line further comprises a second blower for increasing the pressure of the discharged air. The method of claim 1, And a heater unit provided at an air outlet side of the chamber and configured to selectively heat air passing through the indoor heat exchange unit. The method of claim 1, The outdoor heat exchange unit is a heat pump system characterized in that it comprises two heat exchangers. The method of claim 5, The heat pump system, characterized in that during the dehumidification operation, one of the two heat exchangers of the outdoor heat exchange unit is used as a condenser and the other heat exchanger is used as an evaporator. delete delete delete delete Compressing the refrigerant through a compression unit; Some of the compressed refrigerant is condensed by controlling to pass through the first outdoor heat exchanger, and some of the refrigerant is condensed by controlling to pass through the second outdoor heat exchanger, and some of the refrigerant is controlled to pass through the reheat heat exchanger. To condense; A third step of expanding the condensed refrigerant; Providing the expanded refrigerant to a first indoor heat exchanger, a second indoor heat exchanger, and a third indoor heat exchanger to control the dew point to be operated at -10 ° C or lower while evaporating the expanded refrigerant; And, A fifth step of controlling external air to pass through the first indoor heat exchanger, the second indoor heat exchanger, the third indoor heat exchanger, and the reheat heat exchanger in sequence by operating the first blower while the above steps are in progress. Dehumidification operation method of the heat pump system, characterized in that proceeding, including. The method of claim 11, The fourth step is A first dehumidifying step of dehumidifying the expanded refrigerant by controlling it to be operated at a temperature of 5 ° C. by providing the first indoor heat exchanger; A second dehumidifying step of dehumidifying the expanded refrigerant by controlling it to be operated at a temperature of 0 ° C. by providing it to a second indoor heat exchanger; And a cooling dehumidifying step of dehumidifying while supplying the expanded refrigerant to a third indoor heat exchanger so as to operate at a temperature of -10 ° C. or lower. 13. The method of claim 12, And a temperature compensation step of sensing the temperature of the air passing through the reheat heat exchanger through the fifth step to generate a heater to compensate the air to reach the set temperature when the temperature does not reach the set temperature. A dehumidifying operation method of a heat pump system characterized by the above-mentioned. 13. The method of claim 12, The dehumidification operation method of the heat pump system, characterized in that further comprising the step of performing a defrost operation during each of the above steps. The method of claim 14, The defrosting operation Stopping the operation of the first blower and the second blower; Controlling the flow direction of the refrigerant to operate the first outdoor heat exchanger and the third indoor heat exchanger to act as a condenser, and the second outdoor heat exchanger to act as an evaporator; Refrigerant operation method of the heat pump system, characterized in that the step of controlling each of the solenoid valve to stop the refrigerant circulation to the first indoor heat exchanger, the second indoor heat exchanger and the reheat heat exchanger.

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