JP2008136848A - Drier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently eliminate the accumulation of heat in a drying operation in a drier using a heat pump device. <P>SOLUTION: The drier D1 for executing the drying operation of an object to be dried inside a housing chamber 5 by air heated by a radiator 12 includes: a water cooling and dehumidifying part 17 for cooling and dehumidifying the air by external water; and an air circulation route 20 for circulating the air by sending it from the radiator 12 through the inside of the housing chamber 5 to the water cooling and dehumidifying part 17 and returning it to the radiator 12 by a fan 16 as a blowing means. The water to be supplied to the water cooling and dehumidifying part 17 is cooled by a heat sink 75 disposed inside the air circulation route. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dryer that includes a storage chamber for storing a material to be dried and that performs a drying operation of the material to be dried in the storage chamber by air heated by a radiator of a heat pump device.

  In a conventional dryer, a storage chamber for storing an object to be dried such as clothes is configured in a rotating drum that is rotatably mounted in a main body, and an air path for blowing drying air into the storage chamber Is connected. Then, an electric heater or a gas combustion heater is used as a heat source, and the air in the air path is heated by the electric heater or the combustion heater to form high-temperature air, and then blown out into a storage chamber in which an object to be dried such as clothes is stored. The material to be dried in the storage chamber is dried.

  However, in a dryer that uses such an electric heater or a gas combustion heater as a heat source, the amount of power that can be applied to the heater and the amount of heat that can actually heat the air are equal, and it is enormous for drying an object to be dried. There is a problem that energy costs such as electricity bills and gas bills are soaring in order to consume large amounts of power.

  Therefore, in recent years, a heat pump device equipped with a refrigerant circuit in which a compressor, a radiator, a pressure reducing device, a heat absorber, etc. are sequentially connected in a circular pipe is mounted, and the air is heated by the radiator and the heated air is accommodated. Air is blown into the chamber, moisture is removed from the material to be dried contained in the storage chamber, the moisture removed from the material to be dried is condensed by a heat absorber, dehumidified, and again heated by a radiator to enter the storage chamber. A dryer for drying an object to be dried in a storage chamber by blowing air has been used.

  However, in a dryer using such a heat pump device, the amount of heat released from the radiator is equal to the amount of heat input by the compressor to the amount of heat absorbed by the heat absorber. The temperature of the air inside rises.

  For this reason, with the progress of the drying of the object to be dried, heat is gradually accumulated in the refrigerant circuit and the air path, and there is a disadvantage that the heat is trapped in the dryer. In this way, if heat accumulates in the dryer, it may cause damage to the equipment or the refrigerant circuit may be overloaded, so the compressor of the heat pump device must be stopped for safety protection. Therefore, there is a problem that it takes time to dry.

Therefore, a part of the dry air is discharged to the outside of the dryer, a heat exchanger for heat dissipation for exchanging heat with the external air is provided, or an air path that is on the leeward side from the housing chamber and on the upstream side of the radiator In addition to the heat absorber, an attempt has been made to eliminate heat accumulation by, for example, providing a cooling water (second heat absorber) by spraying cooling water (see, for example, Patent Document 1). ).
JP 2004-236965 A

  However, when part of the drying air is discharged to the outside of the dryer, the warm air moistened by removing moisture from the material to be dried is discharged to the outside of the dryer, so that the indoor environment where the dryer is installed is The problem was getting worse.

  Further, when a heat exchanger for heat dissipation for exchanging heat with external air is provided, there is a problem that a heat exchanger must be newly provided or switching means for switching the flow path to the refrigerant circuit must be provided. It was happening.

  The present invention has been made to solve the conventional technical problems, and an object of the present invention is to efficiently eliminate heat accumulation in a drying operation in a dryer using a heat pump device.

  The invention according to claim 1 is provided with a storage chamber for storing an object to be dried, and a heat pump device including a refrigerant circuit in which a compressor, a radiator, a decompression device, a heat absorber, and the like are sequentially connected in a pipe shape, In the dryer which performs the drying operation of the to-be-dried object in the accommodation chamber by the air heated by the radiator, the radiator is provided with a water-cooled dehumidifying unit which cools and dehumidifies the air with external water, and a blower unit. An air circulation path for performing air circulation that is sent to the water-cooled dehumidifying part from the storage chamber and returned to the radiator again, and the water-cooled dehumidifying part is provided by the heat absorber disposed in the air circulation path. The water supplied to is cooled.

  According to a second aspect of the present invention, in the dryer according to the first aspect, the heat absorber is configured by a double pipe, a refrigerant is caused to flow in the inner pipe, and water is caused to flow between the inner pipe and the outer pipe. In addition, the flow of the water and the refrigerant is an opposite flow.

  According to a third aspect of the present invention, in the dryer according to the first aspect, the dryer includes a control device that controls supply of water to the water-cooled dehumidifying unit, and the control device performs the drying operation. Water supply to the water-cooled dehumidifying unit is prohibited for a predetermined period after the start.

  According to a fourth aspect of the present invention, in the dryer according to any one of the first to third aspects, the water that has passed through the water-cooled dehumidifying unit is stored and supplied to the water-cooled dehumidifying unit in the next drying operation. It is characterized by that.

  According to a fifth aspect of the present invention, in the washing / drying machine including the dryer according to any one of the first to fourth aspects, the washing / drying unit includes a function of executing a washing operation in the storage chamber, The passed water is stored and used in the washing operation.

  A sixth aspect of the present invention is the washing / drying machine including the dryer according to any one of the first to fourth aspects, having a function of executing a washing operation in the storage chamber and being used in the washing operation. The stored water is stored, and the stored water is supplied to the water-cooled dehumidifying unit in the drying operation.

  According to the invention of claim 1, it is provided with a storage chamber for storing an object to be dried, and a heat pump device including a refrigerant circuit formed by sequentially connecting a compressor, a radiator, a decompression device, a heat absorber, and the like in a ring shape, In the drier that performs the drying operation of the object to be dried in the accommodation chamber by the air heated by the radiator, the heat radiation is performed by a water cooling / dehumidifying unit that cools and dehumidifies the air with external water, and a blowing unit. An air circulation path for circulating air from the container to the water-cooled dehumidifying section through the housing chamber and returning the air to the radiator again, and the water-cooled dehumidification is performed by the heat absorber disposed in the air circulation path. Since the water to be supplied to the section is cooled, it is possible to eliminate heat accumulation in the drying operation using the heat pump device. In particular, since the external water to the water-cooled dehumidifying part can be cooled by the heat absorber, the air cooling capacity in the water-cooled dehumidifying part is improved, and the dehumidifying effect can be further enhanced.

  In the invention of claim 2, in the above invention, the heat absorber is constituted by a double pipe, a refrigerant is caused to flow in the inner pipe, water is caused to flow between the inner pipe and the outer pipe, and the flow of the water and the refrigerant is changed. Since the counter flow is used, the heat exchanging ability can be improved particularly when a refrigerant in which the high pressure side of the refrigerant circuit is in a supercritical state, such as carbon dioxide, is used as the refrigerant of the heat pump device.

  According to a third aspect of the present invention, in the dryer according to the first aspect, the dryer includes a control device that controls supply of water to the water-cooled dehumidifying unit, and the control device is configured to perform the drying operation. Since the control device prohibits the supply of water to the water-cooled dehumidification unit for a predetermined period after the start of the drying operation, the control device prohibits the supply of water to the water-cooled dehumidification unit for a predetermined period after starting The air discharged into the chamber can be quickly heated to a high temperature. This makes it possible to quickly increase the drying capacity at the start of the drying operation.

  According to a fourth aspect of the present invention, in the dryer according to any one of the first to third aspects, the water that has passed through the water-cooled dehumidifying section is stored and supplied to the water-cooled dehumidifying section in the next drying operation. Therefore, the water that has passed through the water-cooled dehumidifying unit can be stored and reused in the next drying operation. Thereby, water consumption can be reduced.

  Further, according to the invention of claim 5, if it has a function of executing the washing operation in the accommodation chamber, and stores water that has passed through the water-cooled dehumidifying unit and uses it in the washing operation, it passes through the water-cooled dehumidifying unit. Water can be stored and reused in the next washing operation. Thereby, water consumption can be reduced.

  Further, according to the invention of claim 6, the water-cooling dehumidifying unit has a function of executing a washing operation in the accommodation room, stores water used in the washing operation, and stores the stored water in the drying operation. The water used for washing can be stored and reused in the drying operation. Thereby, the consumption of water can be further reduced.

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

  FIG. 1 shows a system diagram of a dryer D4 that performs a drying operation as an embodiment of a dryer to which the present invention is applied. The dryer D4 of the present embodiment is used for drying an object to be dried such as clothing, and in the main body 1, an outer tub drum made of a cylindrical resin arranged with a cylindrical shaft as a horizontal direction, A drum body 2 is provided which is disposed inside the outer tank drum and includes an inner tank drum (rotary drum) made of cylindrical stainless steel. And the inside of this inner tank drum is a storage chamber 5 for storing the material to be dried, and this is also arranged with the axis of the cylinder in the horizontal direction, and this rotating shaft is mounted on the side wall of the outer tank drum The inner tank drum is connected to a shaft of a drive motor (not shown), and the inner tank drum is rotatably held in the outer tank drum with a rotation shaft as an axis of the inner tank drum connected to the shaft.

  A machine room 9 is formed on the side of the drum body 2 in the main body 1, and an air circulation path 20 is formed in the machine room 9. An inlet 20A is formed at one end of the air circulation path 20, and the inlet 20A of the air circulation path 20 communicates with one side of the inner tank drum. Further, an outlet 20B is formed at the other end of the air circulation path 20, and a radiator 12 of the heat pump device 10 described later is installed in the air circulation path 20 in the vicinity of the outlet 20B.

  And the water-cooling dehumidification part 17 mentioned later is installed in the air circulation path | route 20 between the said heat radiator 12 and inlet 20A.

  Further, a fan 16 as a blowing means is provided in the air circulation path 20, and circulates air (drying air) from the outlet 20 </ b> B of the air circulation path 20 into the housing chamber 5 in the inner tank drum. That is, the dryer D4 exchanges heat with the radiator 12 provided on the outlet 20B side of the air circulation path 20 by circulating the air in the storage chamber 5 into the air circulation path 20 by the fan 16 during the drying operation. After the air is heated in, it is discharged into the storage chamber 5 in the inner tank drum 5. Then, the air after circulating in the storage chamber 5 and drying the material to be dried is sucked into the air circulation path 20 from the inlet 20A, and exchanges heat with the water-cooled dehumidifying unit 17 provided on the inlet 20A side. Cooled and dehumidified. Thereafter, the cooled and dehumidified air is again sucked into the fan 16, sent to the radiator 12, and discharged into the storage chamber 5. That is, the air in the air circulation path 20 is sent by the fan 16 from the radiator 12 to the water-cooled dehumidifying unit 17 through the storage chamber 5 and circulated back to the radiator 12 again.

  The water-cooled dehumidifying unit 17 described above is for cooling and dehumidifying the air in the air circulation path 20 with water supplied from the outside through the water supply passage 25. The water supply passage 25 has one end connected to a water supply source such as a water supply outside the dryer D4, and the other end connected to the inlet side of the heat absorber 75 provided in the dryer D4, and the heat absorber 75. It consists of a water passage formed inside. The heat absorber 75 is a heat exchanger for cooling the water supplied from the water supply source by exchanging heat between the water supplied to the water-cooled dehumidifying unit 17 and the refrigerant in the refrigerant circuit.

The heat pump device 10 described above includes a refrigerant circuit in which a compressor 11, a radiator 12, an expansion valve 14 serving as a decompression device, a heat absorber 75, and the like are sequentially connected in a pipe. In addition, a predetermined amount of carbon dioxide (CO ₂ ) is sealed as a refrigerant in the refrigerant circuit of the heat pump device 10 of the present embodiment. Here, the compressor 11 used in this embodiment is a compressor including an electric element (not shown) as a driving element and a compression element driven by the electric element, and the air in the machine chamber 9 of the dryer D4. It is provided outside the circulation path 20.

  A low-pressure refrigerant is introduced from the refrigerant introduction pipe 30 to the compression element of the compressor 11, and high-temperature and high-pressure refrigerant gas compressed by the compression element is discharged to the outside of the compressor 11.

  The refrigerant discharge pipe 37 of the compressor 11 is connected to the inlet of the radiator 12 provided on the outlet 20B side of the air circulation path 20. The refrigerant pipe 32 exiting the radiator 12 is connected to the inlet of the expansion valve 14, the refrigerant pipe 35 exiting the expansion valve 14 reaches the inlet of the heat absorber 75, and the outlet of the heat absorber 75 is connected to the refrigerant introduction pipe 30. To the compressor 11.

  Here, the heat absorber 75 is a water-cooled heat exchanger that exchanges heat between the refrigerant in the refrigerant circuit and the water from the water supply source, as described above. The heat absorber 75 of the present embodiment has a spiral (FIG. 2) or serpentine (FIG. 3) double pipe composed of an inner pipe (inner pipe) 23 and a pipe (outer pipe) 24 provided outside thereof. 22, a refrigerant passage through which a refrigerant flows is formed in the inner pipe 23, and a water passage through which water flows is formed between the inner pipe 23 and the outer pipe 24 which are outside thereof. .

  Specifically, the double pipe 22 includes an inner pipe 23 and an outer pipe 24 having the same axial center as the inner pipe 23 outside the inner pipe 23 and having an inner diameter larger than the outer diameter of the inner pipe 23. The inlet 23A of the inner pipe 23 is formed at one end of the double pipe 22, and the refrigerant pipe 35 coming out from the expansion valve 14 is connected to the inlet 23A. Similarly, an outlet 24 </ b> B of the outer pipe 24 is formed at one end of the double pipe 22, and a water supply pipe 26 of a water supply passage 25 leading to the water-cooled dehumidifying unit 17 is connected to the outlet 24 </ b> B.

  An outlet 23B of the inner pipe 23 is formed at the other end of the double pipe 22, and a refrigerant introduction pipe 30 of the compressor 11 is connected to the outlet 23B. Further, an inlet 24A of an outer pipe 24 is formed at the other end of the double pipe 22, and a water supply pipe 27 of a water supply passage 25 leading to a water supply source outside the dryer D1 is connected to the inlet 24A.

  Thereby, the refrigerant from the expansion valve 14 flows into the heat absorber 75 from one end of the double pipe 22 and flows in the inner pipe 23 from one end of the double pipe 22 to the other end side. Further, the water from the water supply source flows into the heat absorber 75 from the other end of the double pipe 22 and flows between the inner pipe 23 and the outer pipe 24 from the other end of the double pipe 22 to one end side. Become. Therefore, in the heat absorber 75, the flow of water and the refrigerant is a counter flow.

  On the other hand, one end of a drainage passage 28 is connected to the air circulation path 20, and the drainage passage 28 opens in the air circulation path 20 corresponding to the lower part of the water-cooled dehumidifying part 17, and from here the water-cooled dehumidifying part 17. The water that has passed through is configured to be discharged out of the air circulation path 20. For example, the other end of the drainage passage 28 exits from the dryer D4 and is opened at a drainage groove or the like, and the water that has passed through the water-cooled dehumidifying unit 17 exits the dryer D4 via the drainage passage 28 and enters the drainage groove or the like. Discharged.

  The dryer D4 of the present embodiment is controlled by a control device 70 as a control unit that controls the operation of the dryer D4, such as an air temperature in the air circulation path 20 or a refrigerant temperature in the refrigerant circuit of the heat pump device 10. Based on information, operation time, etc., the rotation of a drive motor (not shown), the operation of the compressor 11, the opening of the expansion valve 14, the amount of water supplied from the water supply source, the air volume of the fan 16 in the air circulation path 20, etc. are optimized. So that it is controlled.

  Next, the operation of the dryer D4 with the above configuration will be described. When an object to be dried is put into the storage chamber 5 in the inner tank drum and a power switch and a start switch of an operation switch (not shown) are operated, the control device 70 starts a drying operation of the object to be dried. That is, the control device 70 activates the fan 16 in the air circulation path 20 and the compressor 11 of the heat pump device 10, and simultaneously opens a valve device (not shown) provided in the water supply pipe 27 of the water supply passage 25. Thereby, water is supplied from the water supply source to the heat absorber 75 via the water supply pipe 27. When the compressor 11 is started, a low-temperature and low-pressure refrigerant gas (carbon dioxide refrigerant) is sucked into the compression element of the compressor 11 and compressed to become a high-temperature and high-pressure refrigerant gas, which is discharged from the compressor 11 and flows into the radiator 12. To do. At this time, the refrigerant flows into the radiator 12 while being compressed to the supercritical state in the compressor 11, and the radiator 12 dissipates heat while maintaining the supercritical state, and only the temperature of the refrigerant decreases.

  The refrigerant radiates heat at the radiator 12 and then reaches the expansion valve 14. Then, the refrigerant is depressurized by the expansion valve 14, and in the process, a two-phase mixed state in which gas liquid is mixed is obtained. In this state, the heat absorber 75 is introduced from the inlet 23 </ b> A of the inner pipe 23 formed at one end of the double pipe 22. Flows in. Then, it absorbs heat from the water flowing outside the inner pipe 23 and evaporates. Thereafter, the refrigerant exits the heat absorber 75 from the outlet 23B of the inner pipe 23 formed at the other end of the double pipe 22, and repeats the cycle of being sucked into the compressor 11. The water cooled by the heat absorbing action of the refrigerant in the heat absorber 75 is supplied to the water-cooled dehumidifying unit 17 through the water supply pipe 26.

  On the other hand, when the fan 16 is operated, the drying air in the air circulation path 20 heated by the heat radiation of the high-temperature and high-pressure refrigerant gas in the radiator 12 to a high temperature (air temperature is about + 90 ° C.) is directed to the outlet 20A side. And is discharged into the storage chamber 5 from the outlet 20A. The air discharged into the storage chamber 5 warms the object to be dried stored in the storage chamber 5 to evaporate moisture, thereby drying the object to be dried. Air containing moisture by drying the material to be dried flows out of the storage chamber 5 and returns into the air circulation path 20 from the inlet 20A. At this time, the temperature of the air returning from the inlet 20A into the air circulation path 20 through the storage chamber 5 is about + 30 ° C. immediately after the start of the drying operation (that is, at the beginning of the drying operation). Then, the air that has flowed into the air circulation path 20 through the storage chamber 5 passes through the water-cooled dehumidifying unit 17.

  At this time, moisture contained in the air from the storage chamber 5 (moisture evaporated from the object to be dried) is condensed by being deprived of heat by the water supplied to the water-cooled dehumidifying unit 17 while passing through the water-cooled dehumidifying unit 17. Then, it falls together with the water supplied to the water-cooled dehumidifying unit 17 as water droplets. Then, water that has passed through the water-cooled dehumidifying unit 17 (that is, water evaporated from the object to be dried and condensed in the water-cooled dehumidifying unit 17 and water from the water supply source supplied to the water-cooled dehumidifying unit 17) is drained. It is discharged through a passage 28 to a drainage groove or the like.

  The air that has been dehumidified and dried by the water-cooled dehumidifying unit 17 is sucked into the fan 16 and then discharged toward the radiator 12, and the high-temperature and high-pressure flowing through the radiator 12 in the process of passing through the radiator 12. Heat is exchanged with the refrigerant. And the air heated with the heat radiator 12 comes out from the exit 20B of the air circulation path | route 20, is discharged to the storage chamber 5, and repeats the circulation which takes a moisture from the to-be-dried material in the storage chamber 5, and dries.

  In this way, the water-cooled dehumidifying unit 17 that cools and dehumidifies the air with external water, and the fan 16 sends air from the radiator 12 to the water-cooled dehumidifying unit 17 through the storage chamber 5 and returns to the radiator 12 again. And the air circulation path 20 for performing heat treatment, and cooling the water supplied to the water-cooled dehumidifying unit 17 by the heat absorber 75, so that the heat accumulation in the drying operation using the heat pump device 10 can be eliminated. become.

  Therefore, in this embodiment, the water-cooled dehumidifying unit 17 that cools and dehumidifies the air with external water and the feed fan 16 are sent from the radiator 12 to the water-cooled dehumidifying unit 17 through the housing chamber 5, and again the radiator 12. And an air circulation path 20 for causing the air circulation to be returned to, and the water supplied to the water-cooled dehumidifying unit 17 is cooled by the heat absorber 75. That is, the heat medium that exchanges heat with the refrigerant in the heat absorber 75 becomes water from the water supply source, and becomes a different heat medium from the drying air that exchanges heat with the refrigerant in the radiator 12. For this reason, the air in the air circulation path in the drying operation is dried like a dryer using a conventional heat pump device in which the air in the air circulation path is heated by a radiator and the air in the air circulation path is cooled and dehumidified by a heat absorber. The inconvenience that the temperature rises can be solved. Thereby, even when drying of a to-be-dried object progresses, the water cooling dehumidification part 17 can heat-exchange the water in the outside and the air in the air circulation path 20, and can throw away the heat of air to water. Therefore, it is possible to effectively eliminate heat accumulation. Therefore, the ability of the compressor 11 can be maintained high without limiting or stopping the ability of the compressor 11 as in the prior art, and the drying time can be shortened.

  In particular, the air cooling capacity in the water-cooled dehumidifying unit 17 is improved by cooling the external water supplied to the water-cooled dehumidifying unit 17 with the heat absorber 75 and then supplying it to the water-cooled dehumidifying unit 17 as in this embodiment. Thereby, the dehumidification effect in the said water cooling dehumidification part 17 can be improved further.

  Furthermore, the heat absorber 75 is configured by the double pipe 22 as in the present embodiment, a refrigerant is caused to flow in the inner pipe 23, water is allowed to flow between the inner pipe 23 and the outer pipe 24, and the water and the refrigerant are also flown. By using the counter flow as a counter flow, it is possible to improve the heat exchanging ability particularly when a refrigerant in which the high pressure side of the refrigerant circuit is in a supercritical state, such as carbon dioxide, is used as the refrigerant of the heat pump device 10.

  In this embodiment, one end of the drainage passage 28 is connected to the air circulation path 20 to be opened in the air circulation path 20, and the other end is provided in a drainage groove or the like outside the dryer D1. The water passing through the water cooling and dehumidifying unit 17 is led out to the outside of the air circulation path 20 and discharged to the drainage groove etc. via the drainage passage 28. However, the water passing through the water cooling and dehumidifying unit 17 is not limited to this. It is also possible to store the water that has passed through the dehumidifying unit and supply it to the water-cooled dehumidifying unit 17 in the next drying operation. In this case, a water storage tank that stores water that has passed through the water-cooled dehumidifying unit is provided, and the other end of the drainage passage 28 is connected to the water storage tank. Further, the water stored in the water storage tank is pumped up and supplied to the water-cooled dehumidifying unit 17 through the heat absorber 75.

  Thus, the water that has passed through the water-cooled dehumidifying unit 17 is stored in the water storage tank, and the water that has been stored in the water storage tank in the next drying operation is stored in the water-cooled dehumidifying unit via the heat absorber 75. If it supplies to 17, the water which passed through the water cooling dehumidification part 17 can be stored, and can be reused by the next drying operation. Thereby, water consumption can be reduced. In addition, the water immediately after flowing into the water storage tank through the water cooling / dehumidifying unit 17 is heated by the air in the air circulation path 20, but is stored in the water storage tank so that the next drying operation can be performed. Since it can cool sufficiently, it can be reused without adversely affecting the heat pump device 10.

  Further, the water supplied to the water-cooled dehumidifying unit 17 through the heat absorber 75 is not limited to the water that has passed through the water-cooled dehumidifying unit 17 stored in the tap water or the water storage tank, and other water can be used. is there. For example, if water used once for other purposes, such as water used in a bath, is stored and supplied to the water-cooled dehumidifying unit 17 via the heat absorber 75 in the drying operation, the water is effectively re-used. Can be used.

  Further, in the present embodiment, the heat absorber 75 is constituted by the heat exchanger composed of the double pipe 22 provided with the inner pipe 23 and the outer pipe 24 provided outside thereof, but the present invention is limited to this. There is no problem even if a heat exchanger having another shape is used.

  The dryer D4 of the present embodiment is configured so that the air in the air circulation path 20 is sent from the radiator 12 to the water-cooled dehumidifying unit 17 and the heat absorber 75 by the fan 16 through the housing chamber 5 and returned to the radiator 12 again. Yes. The heat absorber 15 in FIG. 2 has the same configuration as the heat absorber 75.

  In this case, the heat absorber 75 exchanges heat with both the refrigerant in the refrigerant circuit, the water sent to the water-cooled dehumidifying unit 17 and the air in the air circulation path 20 through the air dehumidifying unit 17, and water from the water supply source And a heat exchanger that cools and dehumidifies the air in the air circulation path 20. In this case, the heat medium that exchanges heat with the refrigerant in the heat absorber 75 becomes two heat media (drying air and water from the water supply source).

  Therefore, even when the water-cooled dehumidifying unit 17 and the heat absorber 75 are provided in the air circulation path 20 as in the present embodiment, the heat dissipation amount of the radiator 12 and the heat absorber 75 in the drying operation using the heat pump device 10 are The accumulation of heat caused by the difference in the amount of absorbed heat can be eliminated.

  In particular, in the configuration of the present embodiment, after the air circulating in the air circulation path 20 is cooled and dehumidified by the water cooling and dehumidifying unit 17, it can be further cooled and dehumidified by the heat absorber 75 on the leeward side. It is possible to effectively eliminate the remaining mass.

  Therefore, the ability of the compressor 11 can be maintained high without limiting or stopping the ability of the compressor 11 as in the prior art, and the drying time can be shortened.

  Further, a bypass pipe 50 for bypassing the water-cooled dehumidifying unit 17 and a water flow path switching means 51 (switching valve 50V and switching valve 26V) for controlling whether or not the water discharged from the heat absorber 75 flows to the water-cooled dehumidifying unit 17 are used. The air circulation at the start of the drying operation is controlled by the control device 70 so as to prohibit the supply of water to the water-cooled dehumidifying unit 17 for a predetermined period after the drying operation is started. An increase in the air temperature in the path 20 can be promoted, and the air discharged into the storage chamber 5 can be quickly heated to a high temperature. This makes it possible to quickly increase the drying capacity at the start of the drying operation.

In each of the above embodiments, carbon dioxide (CO ₂ ) is used as a refrigerant and the high pressure side pressure is operated as a supercritical pressure. However, the refrigerant usable in the dryer of the present invention is not limited to this, Even when an HFC (hydrocarbon fluoride) -based refrigerant is used, it is effective.

It is a systematic diagram of a dryer to which the present invention is applied. It is a perspective view which shows the structure of the heat sink of the dryer of one Example to which this invention is applied. It is a perspective view which shows the other structure of the heat sink of the dryer of one Example to which this invention is applied.

Explanation of symbols

D4 Dryer W Washer / Dryer 1 Main Body 2 Drum Main Body 5 Storage Chamber 10 Refrigerant Circuit 11 Compressor 12 Radiator 14 Expansion Valve 15 Heat Absorber 16 Fan 17, 57 Water-cooled Dehumidifier 20 Air Circulation Path 20A Inlet 20B Outlet 22 Double Pipe 23 Inner piping 23A Refrigerant inlet 23B Refrigerant outlet 24 Outer piping 24A Water inlet 24B Water outlet 25, 65 Water supply passage 26, 27 Water supply piping 27V Switching valve 28, 58, 68 Drainage passage 30 Refrigerant introduction pipe 32, 35 Refrigerant pipe 37 Refrigerant discharge pipe 50 Bypass piping 50V switching valve 51 Water flow path switching means 58A, 58B, drainage piping 70 Controller 75 Heat absorber

Claims (6)

A storage chamber for storing an object to be dried, and a heat pump device including a refrigerant circuit in which a compressor, a radiator, a decompression device, a heat absorber, and the like are sequentially connected in a circular pipe, and the air heated by the radiator In the dryer for performing the drying operation of the object to be dried in the storage chamber,
A water-cooled dehumidifying unit that cools and dehumidifies the air with external water;
An air circulation path for sending air from the radiator through the housing chamber to the water-cooled dehumidifying unit and returning the air to the radiator again by a blowing means;
The dryer which cools the water supplied to the said water-cooling dehumidification part by the said heat absorber arrange | positioned in this air circulation path.   The heat absorber is composed of a double pipe, a refrigerant is flowed into the inner pipe, water is flowed between the inner pipe and the outer pipe, and the flow of the water and the refrigerant is set as a counter flow. The dryer according to claim 1. In the dryer according to claim 1,
The dryer includes a control device that controls supply of water to the water-cooled dehumidifying unit,
The control device prohibits the supply of water to the water-cooled dehumidifying unit for a predetermined period after the start of the drying operation.   The drier according to any one of claims 1 to 3, wherein water passing through the water-cooled dehumidifying unit is stored and supplied to the water-cooled dehumidifying unit in the next drying operation.   5. The drying according to claim 1, having a function of executing a washing operation in the accommodation room, storing water that has passed through the water-cooling dehumidifying unit, and using the water in the washing operation. Washing and drying machine equipped with a machine.   2. The water storage unit has a function of executing a washing operation, stores water used in the washing operation, and supplies the stored water to the water-cooled dehumidifying unit in the drying operation. A washing dryer comprising the dryer according to any one of claims 4 to 4.