KR100736857B1 - Drying system using heat pump - Google Patents

Abstract

A drying system using a heat pump according to the present invention comprises: a frame having a drying chamber for drying an object to be dried; A compressor installed in the frame for compressing the refrigerant; A condenser installed inside the drying chamber and condensed by the refrigerant compressed in the compressor; An expansion mechanism installed in the frame, wherein the refrigerant condensed in the condenser is expanded; An evaporator installed inside the drying chamber, wherein the refrigerant expanded in the expansion mechanism absorbs heat and is condensed; A first outside air inlet provided on an upstream side of the evaporator on a circulation path of air inside the frame so that air outside the frame can pass through the evaporator; A first damper operative to regulate the rate of air flowing through the first outside air inlet of the air passing through the evaporator; A first outlet provided on a downstream side of the evaporator on a circulation path of air inside the frame so that air passing through the evaporator can be discharged to the outside of the frame; A second damper operative to regulate a proportion of air passing through the first outlet of air passing through the evaporator; A second outside air inlet provided on an upstream side of the condenser on the circulation path of air inside the frame so that air outside the frame can pass through the condenser; A third damper operative to regulate the proportion of air passing through the second outside air inlet through the condenser; A second outlet provided on a downstream side of the condenser on the circulation path of the air inside the frame so that air passing through the condenser can be discharged to the outside of the frame; And a fourth damper operative to adjust a ratio of the air passing through the second outlet of the air passing through the condenser.

Description

[0001] Drying system using heat pump [0002]

1 is a view showing an example of a drying system using a conventional heat pump.

2 is a view of a drying system using a heat pump according to a preferred embodiment of the present invention.

3 is a schematic perspective view of a drying system using the heat pump shown in Fig.

4 to 8 are conceptual diagrams for explaining the operation of the drying system using the heat pump shown in FIG.

Description of the Related Art

10 ... drying system using heat pump 12 ... frame

15 ... drying chamber 20 ... compressor

22 ... condenser 24 ... expansion mechanism

26 ... evaporator 27 ... humidification recovery tank

30 ... main blower 31 ... first blower

32 ... second blower 40 ... first outside air inlet 42 ... second outside air inlet 51 ... first outlet

52 ... second outlet 61 ... first damper

62 ... second damper 63 ... third damper

64 ... fourth damper 65 ... fifth damper

66 ... sixth damper 70 ... load cell

80 ... controller 91 ... outside temperature sensor

92 ... Air temperature sensor 93 ... Outdoor humidity sensor

94 ... humidity sensor

The present invention relates to a drying system using a heat pump, and more particularly, to a drying system using a heat pump, in which the temperature and humidity in the drying chamber are optimized for drying the drying chamber The present invention relates to a drying system using a heat pump having a structure that can be variably controlled.

Generally, a drying system using a heat pump dehumidifies the moisture in the drying chamber by the condensation in the evaporator of the heat pump, reheats the heat by the heat radiated from the indoor condenser, And the water is absorbed from the object to be dried repeatedly.

1 is a schematic cross-sectional view showing the structure of a drying system 1 using a conventional heat pump operated on this principle. 1, a conventional drying system using a heat pump includes a compressor 2, a three-way valve 3, an outdoor condenser 4, an indoor condenser 5, an expansion mechanism 6, and an evaporator 7 .

The compressor 2, the three-way valve 3, the outdoor condenser 4, the indoor condenser 5, the expansion mechanism 6 and the evaporator 7 are connected to each other via the refrigerant passage 8 . The compressor (2) compresses the refrigerant into a gas of high temperature and high pressure. The outdoor condenser (4) and the indoor condenser (5) transfer heat from the gaseous refrigerant at high temperature and pressure discharged from the compressor (2) to the surroundings, Heats the air. In the expansion mechanism (6), the refrigerant discharged from the outdoor condenser (4) or the indoor condenser (5) is expanded to a low temperature and low pressure state.

The evaporator 7 evaporates the low-temperature, low-pressure gaseous refrigerant discharged from the expansion mechanism 6 by receiving heat from the inside of the evaporator 7, that is, the air inside the drying chamber 100, Creates a low-pressure gas state. In this process, the temperature and humidity of the air inside the drying chamber 100 are lowered together. Accordingly, the evaporator 7 functions to lower the humidity of the air inside the drying chamber 100. Further, since the evaporator lowers the temperature of the air inside the drying chamber, the drying condition of the drying object 9 inside the drying chamber is deteriorated.

In addition, two condensers (4,5) are provided. One is an indoor condenser 5 installed in the drying chamber 100 and the other is an outdoor condenser 4 installed outside the drying chamber 100. A three-way valve (3) is provided on the refrigerant flow path between the indoor condenser (5) and the outdoor condenser (4). The three-way valve (3) can selectively open or close the high-temperature and high-pressure gas refrigerant discharged from the compressor to be sent to the indoor condenser or the outdoor condenser. That is, the three-way valve 3 interrupts the flow of the high-temperature and high-pressure gas refrigerant sent to the indoor condenser 5 for heating the air inside the drying chamber 100, It is important to prevent the That is, when the temperature of the air inside the drying chamber 100 is heated more than necessary, the three-way valve 3 causes the flow of the refrigerant discharged from the compressor 2 to flow into the outdoor condenser 4, So that heat is discharged to the outside of the drying chamber 100.

In the drying system 1 using the conventional heat pump, the state of the air inside the drying chamber 100 is controlled irrespective of the temperature and humidity of the air outside the drying chamber 100. That is, regardless of the air condition outside the drying chamber 100, the temperature and humidity of the air inside the drying chamber 100 can be controlled. That is, the inside of the drying chamber 100 is heated through the indoor condenser 5 and the humidity inside the drying chamber 100 is lowered through the evaporator 7.

However, since the drying system 1 using the conventional heat pump does not consider the temperature and the humidity of the air outside the drying chamber 100, the temperature of the drying chamber 100 is lower than the temperature and humidity of the air inside the drying chamber 100 100, there is a problem that the efficiency becomes poor when the temperature or humidity condition of the outside air is better. Further, since the outdoor condenser 4 and the three-way valve 3 are essentially required, there is a problem that the manufacturing cost is high.

The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to provide an apparatus and a method for controlling the inside of a drying chamber in an optimum drying condition by taking into consideration temperature and humidity conditions of air inside a drying chamber and outside of a drying chamber, And to provide a drying system using a heat pump with improved structure for easy installation.

According to an aspect of the present invention, there is provided a drying system using a heat pump, the drying system including: a frame having a drying chamber for drying an object to be dried;

A compressor installed in the frame for compressing the refrigerant;

A condenser installed inside the drying chamber and condensed by the refrigerant compressed in the compressor;

An expansion mechanism installed in the frame, wherein the refrigerant condensed in the condenser is expanded;

An evaporator installed inside the drying chamber, wherein the refrigerant expanded in the expansion mechanism absorbs heat and is condensed;

A first outside air inlet provided on an upstream side of the evaporator on a circulation path of air inside the frame so that air outside the frame can pass through the evaporator;

A first damper operative to regulate the rate of air flowing through the first outside air inlet of the air passing through the evaporator;

A first outlet provided on a downstream side of the evaporator on a circulation path of air inside the frame so that air passing through the evaporator can be discharged to the outside of the frame;

A second damper operative to regulate a proportion of air passing through the first outlet of air passing through the evaporator;

A second outside air inlet provided on an upstream side of the condenser on the circulation path of air inside the frame so that air outside the frame can pass through the condenser;

A third damper operative to regulate the proportion of air passing through the second outside air inlet through the condenser;

A second outlet provided on a downstream side of the condenser on the circulation path of the air inside the frame so that air passing through the condenser can be discharged to the outside of the frame; And

And a fourth damper that is operated to adjust a ratio of air that is discharged through the second outlet of the air passing through the condenser.

An outside temperature sensor installed outside the frame for measuring a temperature of air outside the drying chamber;

An inside air temperature sensor installed inside the frame for measuring the temperature of the air inside the drying chamber;

An outside air humidity sensor installed outside the frame for measuring the humidity of air outside the drying chamber;

An indoor humidity sensor installed inside the frame for measuring the humidity of the air inside the drying chamber; And

Wherein the first damper and the second damper are operated based on the data measured by the outdoor humidity sensor and the indoor humidity sensor, and the third damper and the fourth damper are operated based on the data measured by the outdoor temperature sensor and the indoor temperature sensor, And a control unit for operating the damper.

A fifth damper installed between the first outlet and the second outdoor air inlet and operated to adjust a ratio of the outside air flowing into the drying chamber;

A main blower installed in the drying chamber to circulate air in the drying chamber more smoothly in the drying chamber; And

And a sixth damper installed on a lower wall of the frame for selectively opening and closing the air in accordance with the air pressure in the drying chamber to adjust an air pressure in the drying chamber.

And a load cell installed on the bottom of the drying chamber for measuring the weight of the dried material inside the drying chamber.

And a humidifying recovery tank installed below the evaporator for recovering moisture contained in the air inside the drying chamber by the dehumidifying action of the evaporator and using the recovered moisture for humidifying the inside of the drying chamber as needed .

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

2 is a view of a drying system using a heat pump according to a preferred embodiment of the present invention. 3 is a schematic perspective view of a drying system using the heat pump shown in Fig. 4 to 8 are conceptual diagrams for explaining the operation of the drying system using the heat pump shown in FIG.

2 to 8, a drying system 10 using a heat pump according to a preferred embodiment of the present invention includes a frame 15, a heat pump system installed in the frame 15, A second damper 62, a second outside air inlet port 42, a third damper 63, and a second outlet port 62. The inlet port 40, the first damper 61, the first outlet port 51, the second damper 62, An outside air temperature sensor 91, an outside air humidity sensor 93, an inside air temperature sensor 92, an inside air humidity sensor 94, a main blower 30, a first air damper 52, a fourth damper 64, A fifth damper 65, a sixth damper 66, a load cell 70, and a control unit 80, as shown in Fig. The arrows shown in Figs. 2 and 4 to 8 indicate circulation paths of air.

The frame 15 is made of a metal material such as steel. However, the frame 15 can be made of various materials such as plastic, cement, block, and the like. The frame 15 is divided into the inside and the outside, and the frame 15 has a drying chamber 15 for drying the laundry 500 in its internal space.

The frame 15 is provided with a heat pump system. In this embodiment, a heat pump system is provided inside the frame 15. The heat pump system includes a compressor 20, a condenser 22, an expansion mechanism 24, an evaporator 26, and a refrigerant passage 28 for sequentially connecting them.

The compressor (20) compresses the refrigerant into a high-temperature and high-pressure gas. The condenser 22 conveys heat from the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 20 to the surroundings to heat the air in the surroundings, i.e., the drying chamber 15, to a low-temperature and high-pressure liquid state. The expansion mechanism (24) expands the refrigerant discharged from the condenser (22) to a low temperature and low pressure state. The inflator typically uses a typical heat pump component, such as an expansion valve. The evaporator 26 evaporates the low-temperature, low-pressure gaseous refrigerant discharged from the inflator from the outside of the evaporator 26 to generate a relatively low-temperature and low-pressure gaseous state. The condenser 22 and the evaporator 26 of the heat pump are preferably installed on the drying chamber 15.

The first outside air inlet port 40 is a kind of hole provided in the frame 15 so that the inside of the drying chamber 15 and the air outside the drying chamber 15 can communicate with each other. The first outside air inlet 40 is installed above the evaporator 26. The first outside air inflow port 40 serves to allow air outside the frame 15 to pass through the evaporator 26. The first outside air inlet 40 is provided on the upstream side of the evaporator 26 on the circulation path of the air inside the frame 15. A first blower 31 is provided on the downstream side of the evaporator 26 on the circulation path of the air inside the frame 15. A first damper 61 is installed in the first outside air inflow opening 40 so that the first outside air inflow opening 40 can be opened and closed. The first damper 61 may be operated to adjust the proportion of the air passing through the first outside air inlet 40 of the air passing through the evaporator 26. The first damper 61 may be manufactured in various shapes, but in this embodiment, the first damper 61 is slid on the roll. A driving source such as a motor may be used for the operation of the first damper 61. When the first damper 61 closes the first outside air inlet 40, only the air inside the drying chamber 15 can pass through the evaporator 26.

The first outlet 51 is provided in the frame 15 and is a kind of hole through which the inside of the drying chamber 15 and the air outside the drying chamber 15 can communicate with each other. The first outlet (51) is installed above the evaporator (26). The first outlet (51) serves to allow the air passing through the evaporator (26) to be discharged to the outside of the frame (15). The first outlet (51) is provided on the downstream side of the evaporator (26) on the circulation path of the air inside the frame (15). A second damper is installed in the first outlet 51 so that the second outlet can be opened and closed. The second damper can be operated to regulate the amount of air that has passed through the evaporator (26) and is discharged through the first outlet (51). The second damper 62 may be manufactured in various forms, but in the present embodiment, it is slidable by a roll like the first damper 61. A drive source such as a motor may be used for the operation of the second damper. When the second damper (62) closes the first outlet (51), air passing through the evaporator (26) is circulated in the drying chamber (15).

The second outside air inlet 42 is a kind of hole provided in the frame 15 so that the inside of the drying chamber 15 and the air outside the drying chamber 15 can communicate with each other. The second outside air inlet 42 is provided above the condenser 22. The second outside air inlet port 42 serves to allow the air outside the frame 15 to pass through the condenser 22. The second outside air inlet port (42) is provided on the upstream side of the condenser (22) on the circulation path of the air inside the frame (15). A second blower (32) is provided on the downstream side of the condenser (22) on the circulation path of the air inside the frame (15).

The third damper 63 is provided to adjust the amount of outside air flowing through the second outside air inlet 42. That is, the third damper 63 regulates the proportion of air flowing through the second outside air inlet 42 of the air passing through the condenser 22. The third damper 63 may be manufactured in various forms, but in the present embodiment, the third damper 63 is slid by a roll like the first damper 61. A driving source such as a motor may be used for the operation of the third damper 63. When the third damper 63 closes the first outside air inlet 40, only the air inside the drying chamber 15 passes through the condenser 22.

The second outlet 52 is provided in the frame 15 and is a kind of hole through which the inside of the drying chamber 15 and the air outside the drying chamber 15 can communicate with each other. The second outlet (52) is installed above the condenser (22). The second outlet 52 serves to allow the air passing through the condenser 22 to be discharged to the outside of the frame 15. The second outlet (52) is provided on the downstream side of the condenser (22) on the circulation path of the air inside the frame (15). A fourth damper 64 is provided in the second outlet 52 so that the second outlet 52 can be opened and closed. The fourth damper 64 may be operated to regulate the amount of air that is discharged through the second outlet 52 of the air that has passed through the condenser 22. The fourth damper 64 may be manufactured in various forms, but in the present embodiment, the fourth damper 64 is slid by a roll like the first damper 61. A driving source such as a motor may be used for the operation of the fourth damper 64. When the fourth damper (64) closes the second outlet (52), air passing through the condenser (22) is circulated in the drying chamber (15).

The outside temperature sensor 91 is installed outside the frame 15 to measure the temperature of air outside the drying chamber 15. The outside air humidity sensor 93 is installed outside the frame 15 to measure the humidity of the air outside the drying chamber 15. The inside air temperature sensor 92 is installed inside the frame 15 to measure the temperature of the air inside the drying chamber 15. The inside humidity sensor 94 is installed inside the frame 15 to measure the humidity of the air inside the drying chamber 15. The structure of the sensors can be adopted among known temperature or humidity sensors, and thus a detailed description thereof will be omitted.

The main blower 30 is provided to circulate the air in the drying chamber 15 more smoothly in the drying chamber 15. The main blower 30 is installed in the drying chamber 15.

The fifth damper 65 is installed between the first outlet 51 and the second outside air inlet 42 to control the ratio of the outside air flowing into the drying chamber 15. The frame 15 on which the fifth damper 65 is installed is provided with an air inlet opening similar to the first outdoor air inlet 40 and the fifth damper 65 is operated to open and close the air inlet.

The sixth damper (66) is installed on the lower wall of the frame (15). The sixth damper 66 is selectively opened and closed according to the air pressure in the drying chamber 15 to adjust the air pressure inside the drying chamber 15. The sixth damper 66 is made of a soft material having elasticity such as rubber or the like and restricts the inflow of air into the drying chamber 15 from the outside of the drying chamber 15, Allowing air to flow out of the drying chamber (15). The sixth damper 66 is opened only when the pressure of air in the drying chamber 15 is higher than a pressure of air outside the drying chamber 15 by a predetermined value or more.

In order to divide the space where the evaporator 26 and the condenser 22 are installed and the space where the laundry 500 is dried, a partition wall 17 is provided in the drying chamber 15. Part of the air circulating in the drying chamber 15 by the partition wall 17 passes through the upper part of the partition wall 17 and passes through the evaporator 26 and the condenser 22, And some of them are circulated in the drying chamber 15 along the lower portion of the partition wall 17 in a purity manner.

The load cell 70 is installed on the bottom of the drying chamber 15. The load cell 70 is provided to measure the weight of the laundry 500 to be dried in the drying chamber 15. The weight of the laundry 500 measured through the load cell 70 is fed back to a control unit 80 to be described later so that the drying condition of the laundry 500 is compared with a preset weight, The temperature and humidity conditions of the device can be adjusted.

A humidifying recovery tank 27 is provided below the evaporator 26. The humidifying recovery tank 27 is provided to recover the moisture contained in the air inside the drying chamber 15 by the dehumidifying action of the evaporator 26 and to humidify the inside of the drying chamber 15 if necessary. The humidifying recovery tank 27 functions to humidify the inside of the drying chamber 15, if necessary, without requiring a separate water replenishment or water piping inside the drying chamber 15. The humidifying recovery tank 27 appropriately supplies water to the laundry 500 according to the condition of the laundry 500 to prevent rapid drying of the surface of the laundry 500, 500 is prevented from being excessively strengthened so that moisture inside the laundry 500 is smoothly discharged and temperature deviation of the laundry 500 is reduced.

The control unit 80 operates the first damper 61 and the second damper 62 based on the data measured by the outside air humidity sensor 93 and the inside air humidity sensor 94, The third damper 63 and the fourth damper 64 are operated based on the data measured by the temperature sensor 91 and the inside temperature sensor 92. [ The control unit 80 can also control the fifth damper 65 and the main blower 30 and can control the drying state of the laundry 500 based on the measured and transmitted data from the load cell 70 And stopping the operation of the drying system according to the present invention when the drying of the material 500 becomes a desired condition.

The operation of the drying system 10 using a heat pump including such components will be described.

The operation of the drying system using the heat pump according to the present invention will be described by taking as an example the case where the agricultural product such as shiitake is dried with the drying system 10 using the heat pump.

The drying object 500 to be dried such as shiitake mushroom is placed in the drying chamber 15 at the same place as the rack 72 and the load cell 70 can sense the weight of the drying object 500 Place it in position. Then, the controller 80 is operated to operate the drying system using the heat pump. Then, the compressor (20) of the heat pump system operates. The refrigerant compressed by the compressor (20) at high temperature and high pressure passes through the condenser (22) and heats the air around the condenser (22). As a result, the temperature of the air around the condenser 22 rises. The refrigerant that has passed through the condenser (22) is in a liquid state because heat is lost. In the expansion mechanism (24), the refrigerant in the liquid state becomes a low-temperature low-pressure liquid while expanding swollen. In the evaporator 26, heat is supplied from the periphery of the evaporator 26, and the refrigerant is converted into a gas. At the same time, the humidity of the air around the evaporator 26 is lowered.

At this time, the main blower 30 functions to circulate air in the drying chamber 15 in a predetermined direction. The fifth damper 65 serves to mix the air inside the drying chamber 15 and the air outside the drying chamber 15 by opening and closing as required. The sixth damper 66 is installed in the drying chamber 15 so that the air pressure inside the drying chamber 15 is not excessively higher than the air pressure outside the drying chamber 15, And is opened by the pressure. Therefore, the pressure inside the drying chamber (15) is maintained in a state where it does not significantly differ from the pressure outside the drying chamber (15).

The outdoor air temperature sensor 91 measures the temperature of the air outside the drying chamber 15 and the outdoor air humidity sensor 93 measures the humidity of the air outside the drying chamber 15. At the same time, the inside air temperature sensor 92 measures the temperature of the air inside the drying chamber 15, and the inside humidity sensor 94 measures the humidity of the air inside the drying chamber 15. The controller 80 receives the measured data from the sensors and calculates the optimum drying conditions. The controller 80 heats or dehumidifies the air inside the drying chamber 15 through the heat pump system, (15), or generates a control signal that causes a part of the air inside the drying chamber (15) to flow out of the drying chamber (15).

Hereinafter, the action occurring in the evaporator 26 and the action occurring in the condenser 22 will be described in more detail.

First, the action occurring around the evaporator 26 is described.

A first blower 31 is provided on the downstream side of the evaporator 26 on the circulation path of the air inside the frame 15 to blow air to the evaporator 26. The air passing through the evaporator 26 may be the air inside the drying chamber 15 or the air outside the drying chamber 15 as the case may be. When the humidity outside the drying chamber 15 is lower than the humidity inside the drying chamber 15 by the data measured by the outside air humidity sensor 93 and the inside humidity sensor 94, It is more preferable to use the outside air. In this case, as shown in FIG. 4, the first damper 61 is operated to open the first outside air inlet 40. Then, the air outside the drying chamber (15) passes through the evaporator (26). As a result, the refrigerant in the evaporator 26 receives heat and is converted into a gaseous state, and the air passing through the evaporator 26 is dehumidified to lower the humidity. However, since the dehumidified air sucks heat to the refrigerant of the evaporator 26, there is a problem that the temperature is lowered. Accordingly, when the temperature inside the drying chamber 15 is excessively low, the temperature of the air inside the drying chamber 15 is lowered by discharging the air passing through the evaporator 26 to the outside as shown in FIG. 4 . In this case, the second damper (62) is operated to open the first outlet (51).

5, when the temperature inside the drying chamber 15 is sufficiently high and the humidity outside the drying chamber 15 is lower than the humidity inside the drying chamber 15, the first outside air inlet 40, The second damper 62 is operated so that the first damper 61 is operated and the first outlet 51 is closed.

6, when the humidity inside the drying chamber 15 is sufficiently lower than the humidity outside the drying chamber 15, the first damper 61 is closed so that the first outside air inlet 40 is closed And the second damper 62 is operated so that the first outlet 51 is closed. Therefore, in this case, only the air inside the drying chamber 15 passes through the evaporator 26.

Now, the operation taking place in the direction of the condenser 22 will be described.

A second blower 32 is provided on the downstream side of the condenser 22 on the circulation path of the air inside the frame 15 to blow air to the condenser 22. The air passing through the condenser 22 may be air inside the drying chamber 15 or air outside the drying chamber 15 as the case may be. When the temperature outside the drying chamber 15 is lower than the temperature inside the drying chamber 15 due to the data measured by the outside air temperature sensor 91 and the inside temperature sensor 92, There is no need to introduce the air of. In this case, as shown in FIG. 7, the third damper 63 is operated to close the second outside air inlet 42. Then, only air in the drying chamber (15) passes through the condenser (22). As a result, the refrigerant in the condenser 22 is heat-exchanged and is transformed into a liquid state, and the air passing through the condenser 22 is heated and becomes higher in temperature.

On the other hand, when the temperature inside the drying chamber (15) is excessively high, the air passing through the condenser (22) is discharged to the outside, so that the temperature of the air inside the drying chamber (15) can be prevented from becoming too high. In this case, as shown in FIG. 8, the third damper 63 operates to open the second outside air inlet 42 so that the air outside the drying chamber 15 passes through the condenser 22 The fourth damper 64 operates to open the second outlet 52 so that the air heated by the condenser 22 is discharged to the outside of the drying chamber 15.

7, when the temperature inside the drying chamber 15 is lower than the optimal temperature and the temperature outside the drying chamber 15 is lower than the temperature inside the drying chamber 15, The fourth damper 64 is operated so that the third damper 63 is operated and the second outlet 52 is also closed so that the inlet 42 is closed. Therefore, the air inside the drying chamber (15) is circulated and heated by the condenser (22). As a result, the temperature of the air inside the drying chamber (15) becomes close to the optimum temperature.

The humidifying recovery tank 27 provided below the evaporator 26 recovers moisture contained in the air inside the drying chamber 15 by the dehumidifying action of the evaporator 26 and supplies the moisture contained in the drying chamber 15 The inside of the drying chamber 15 can be humidified.

The operations occurring in the vicinity of the evaporator 26 and the condenser 22 have been described above.

The load cell 70 measures the weight of the dried object 500 to be dried in the drying chamber 15 and transmits the measured data to the control unit 80. [ The control unit 80 calculates the moisture content of the dried product to grasp the dried state of the dried product 500 and control the operation of the drying system using the heat pump to be performed efficiently.

As described above, the drying system 10 using the heat pump according to the present invention optimally combines the inside of the drying chamber 15 and the inside of the drying chamber 15 to maintain the drying conditions in the optimal drying environment, thereby shortening the drying time There is an effect that a high-quality dried object 500 can be obtained. Unlike the conventional drying system using a heat pump, the outdoor condenser 22 is not required, and there is no need for additional facilities such as a three-way valve or a check valve, so that the manufacturing cost is greatly reduced. have. In addition, since there is no outdoor condenser 22, there is no need for piping connected to the outdoor condenser 22 in order to construct a heat pump system, and the installation cost is greatly reduced. In addition, It is possible to guarantee the stability of the system by a single trial operation. Thus, the operation stability of the drying system is assured.

The drying system 10 using the heat pump according to the present invention introduces a drying method different from that of the conventional drying system so that when the load cell 70 is installed as in the preferred embodiment of the present invention, The present invention is not only capable of predicting the drying state of the dampers, but also controlling the plurality of dampers to maximize drying efficiency.

In the embodiment of the present invention, an outside temperature sensor installed outside the frame for measuring the temperature of air outside the drying chamber 15; An inside air temperature sensor installed inside the frame for measuring the temperature of the air inside the drying chamber; An outside air humidity sensor installed outside the frame for measuring the humidity of air outside the drying chamber; An indoor humidity sensor installed inside the frame for measuring the humidity of the air inside the drying chamber; And operating the first damper and the second damper on the basis of data measured by the outside air humidity sensor and the inside humidity sensor, as well as operating the third damper and the second damper based on the data measured by the outside air temperature sensor and the inside air temperature sensor, 4 damper. However, in the case of manually operating the damper, the object of the present invention can be achieved even if the sensors and the controller are not provided.

In an embodiment of the present invention, a fifth damper is installed between the first outlet and the second outdoor air inlet and is operated to adjust the ratio of the outside air flowing into the drying chamber. A main blower installed in the drying chamber to circulate air in the drying chamber more smoothly in the drying chamber; And a sixth damper installed on a lower wall of the frame and selectively opening and closing the air in accordance with the air pressure in the drying chamber to adjust an air pressure inside the drying chamber. However, the fifth damper, Even though the blower and the sixth damper are not provided, the performance of the sixth damper is somewhat deteriorated, but the object of the present invention can be achieved.

In the embodiment of the present invention, it is described that the load cell is installed on the bottom of the drying chamber and measures the weight of the dry substance to be dried in the drying chamber. However, even if there is no load cell, It is possible to achieve the object of the present invention.

In the embodiment of the present invention, the evaporator is provided below the evaporator, and the moisture contained in the air inside the drying chamber is recovered by the dehumidifying action of the evaporator, and if necessary, the recovered moisture is used for humidifying the inside of the drying chamber And the humidification recovery tank. However, even when the humidification recovery tank is not provided, the object of the present invention can be achieved.

While the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not to be limited by the examples, and various changes and modifications may be made without departing from the spirit and scope of the invention.

As described above, the drying system using the heat pump according to the present invention optimizes the inside of the drying chamber and the inside environment of the drying chamber to maintain the drying conditions in the optimal drying environment, thereby shortening the drying time and obtaining high- There is an effect that can be. In addition, unlike a conventional drying system using a heat pump, an outdoor condenser is not required, and additional components such as a three-way valve and a check valve are not required, thereby significantly reducing manufacturing costs. In addition, since there is no outdoor condenser, there is no need for piping connected to the outdoor condenser in order to constitute a heat pump system. In addition to this, the installation cost is greatly reduced. The stability of the system can be guaranteed. Thus, the operation stability of the drying system is assured.

In addition, the drying system using the heat pump according to the present invention introduces a drying method different from the conventional drying system, so that when the load cell is installed as in the preferred embodiment of the present invention, However, it is possible to maximize the drying efficiency by adjusting the damper of the plural.

Claims (5)

A frame having a drying chamber for drying the laundry; A compressor installed in the frame for compressing the refrigerant; A condenser installed inside the drying chamber and condensed by the refrigerant compressed in the compressor; An expansion mechanism installed in the frame, wherein the refrigerant condensed in the condenser is expanded; An evaporator installed inside the drying chamber, wherein the refrigerant expanded in the expansion mechanism absorbs heat and is condensed; A first outside air inlet provided on an upstream side of the evaporator on a circulation path of air inside the frame so that air outside the frame can pass through the evaporator; A first damper operative to regulate the rate of air flowing through the first outside air inlet of the air passing through the evaporator; A first outlet provided on a downstream side of the evaporator on a circulation path of air inside the frame so that air passing through the evaporator can be discharged to the outside of the frame; A second damper operative to regulate a proportion of air passing through the first outlet of air passing through the evaporator; A second outside air inlet provided on an upstream side of the condenser on the circulation path of air inside the frame so that air outside the frame can pass through the condenser; A third damper operative to regulate the proportion of air passing through the second outside air inlet through the condenser; A second outlet provided on a downstream side of the condenser on the circulation path of the air inside the frame so that air passing through the condenser can be discharged to the outside of the frame; And And a fourth damper operable to control a ratio of air passing through the second outlet of the air passing through the condenser. The method according to claim 1, An outside temperature sensor installed outside the frame for measuring a temperature of air outside the drying chamber; An inside air temperature sensor installed inside the frame for measuring the temperature of the air inside the drying chamber; An outside air humidity sensor installed outside the frame for measuring the humidity of air outside the drying chamber; An indoor humidity sensor installed inside the frame for measuring the humidity of the air inside the drying chamber; And Wherein the first damper and the second damper are operated based on the data measured by the outdoor humidity sensor and the indoor humidity sensor, and the third damper and the fourth damper are operated based on the data measured by the outdoor temperature sensor and the indoor temperature sensor, And a control unit for operating the damper. 3. The method of claim 2, A fifth damper installed between the first outlet and the second outdoor air inlet and operated to adjust a ratio of the outside air flowing into the drying chamber; A main blower installed in the drying chamber to circulate air in the drying chamber more smoothly in the drying chamber; And Further comprising a sixth damper installed on a lower wall of the frame and selectively opening and closing the air in accordance with the air pressure in the drying chamber to adjust the air pressure inside the drying chamber. The method according to claim 1, Further comprising a load cell installed on a bottom of the drying chamber for measuring a weight of a drying object to be dried in the drying chamber. The method according to claim 1, And a humidifying recovery tank provided below the evaporator for recovering moisture contained in the air inside the drying chamber by the dehumidifying action of the evaporator and using the recovered moisture for humidifying the inside of the drying chamber, And a drying system using the heat pump.

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