JP2008086693A - Drying apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drying apparatus achieving a high drying performance by preventing growth of frost or ice generated in a heat absorber and by eliminating a water splattering phenomenon. <P>SOLUTION: A heat pump device 30 is formed by connecting a compressor 26 for compressing a refrigerant, a radiator 23 for radiating heat of the compressed refrigerant, a throttle device 27 for decompressing the high-pressure refrigerant, and the heat absorber 21 for absorbing heat from surroundings by the decompressed low-pressure refrigerant so that the refrigerant is circulated through a duct 28. The drying apparatus includes a water tub 3 for storing articles 4 to be dried, a blowing means 12 for supplying air heated by the radiator 23 to the water tub 3, and a heat-exchange air passage for circulating the air in the water tub 3 to the radiator 23 through the heat absorber 21. The radiator 23 and the heat absorber 21 are arranged in the heat exchange air passage. High-pressure piping is provided so as to flow the high-pressure refrigerant cooled by the radiator 23 to an upper part of the heat absorber 21. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a drying apparatus used in a clothes dryer used in general households or a laundry dryer with a washing function added.

  As an example of the prior art, a washing and drying machine for clothing and the like will be described with reference to FIG.

  As shown in FIG. 7, the conventional washer / dryer is provided with a cylindrical water tank 3 elastically supported by a plurality of suspensions 2 in a housing 1, and vibrations during washing and dehydration are caused by the suspensions 2. It is configured to absorb.

  In addition, a cylindrical and horizontal axis type rotating tank 5 that accommodates a so-called dry object (hereinafter referred to as clothing 4) 4 to be washed or dried such as clothes is rotatably provided inside the water tank 3. ing. The rotating tub 5 is configured to rotate by rotating the rotating shaft 6a by the drive motor 6.

  A plurality of baffles (not shown) for stirring the clothes 4 are provided on the inner wall of the rotating tub 5, and a plurality of small holes 5 a are provided on the peripheral wall of the rotating tub 5.

  On the front surface of the housing 1, there are provided an opening 1a for taking in and out the garment 4 and a door 7 for opening and closing the opening 1a.

  In addition, openings 3 a and 5 b for taking in and out are provided on the front side of the water tank 3 and the rotating tank 5, respectively. Further, the opening 3 a of the water tank 3 is watertight with the opening 1 a of the housing 1 by the bellows 8. It is connected to.

  Further, a drain port 9 for discharging washing water is provided at the bottom of the water tank 3, and the drain port 9 is connected to a drain hose 11 via a drain valve 10, and the tip of the drain port 9 is a washing dryer. Has been derived out of.

  The blower 12 is connected to a circulation duct 15 to be described later, and the hot air heated by the heater 13 is sent from the air supply port 14 to the rotary tank via the blower passage 20 formed between the water tank 3 and the rotary tank 5. 5 is used to supply air.

  The circulation duct 15 passes through the rotary tank 5 and the water tank 3 and dehumidifies the damp drying air. One end of the circulation duct 15 is connected to the exhaust port 16 at the bottom of the water tank 3 and the other end is connected to the blower 12. Yes.

  The water supply valve 17 controls water supply from a water supply hose 18 connected to a faucet (not shown) of a water supply, and supplies water into the water tank 3.

  The operation of the conventional washing and drying machine configured as described above is as follows.

  When performing the washing operation, the door 7 is opened, the clothes 4 and the detergent are put into the rotating tub 5, and the operation is started.

  In the operation, first, the water supply valve 17 opens a water supply port (not shown) on the washing water side, and supplies a predetermined amount of water into the water tank 3 and the rotary tank 5. And when water supply is complete | finished, the drive motor 6 will act | operate and the rotation tank 5 will be rotationally driven and will perform washing | cleaning operation | movement.

  After a predetermined time, the drive motor 6 stops, the drain valve 10 opens, and the dirty water flows out from the small hole 5a of the rotating tank 5 to the water tank 3. And it drains from the drain port 9 provided in the bottom part of the water tank 3, and drains to the drainage place outside a washing dryer through the drainage hose 11.

  Next, water is supplied to the water tank 3 and the rotary tank 5 in the same manner as described above, and a rinsing operation is performed.

  When the rinsing is completed, the drain valve 10 is opened and drained in the same manner as when washing is completed, and then the rotating tub 5 is rotationally driven at a high speed by the drive motor 6, whereby the clothes 4 are dehydrated.

  When the washing / rinsing operation is completed as described above, the drying operation is started.

  In the drying process, the blower 12 and the heater 13 are energized, and the rotary tank 5 is rotationally driven by the drive motor 6 at a low speed.

  Therefore, while the clothes 4 are agitated by the rotation of the rotating tub 5, the warm air heated by the heater 13 is blown in the direction of arrow a by the blower 12, passes through the air supply path 20, and flows from the air supply port 14 to the arrow b. As shown in FIG. This hot air takes away moisture from the clothes 4, then passes through the water tank 3 through the small hole 5 a of the rotating tank 5, and reaches the circulation duct 15 through the exhaust port 16.

  At this time, the water supply valve 17 opens a water supply port (not shown) on the cooling water side, and as a result, cooling water is poured into the circulation duct 15.

  The warm air that has taken away moisture from the clothing 4 and contained moisture is cooled by the cooling water when passing through the circulation duct 15. As a result, condensation of moisture in the warm air occurs, and the wet warm air is dehumidified by the condensation and returns to the blower 12 again as indicated by an arrow c.

  The cooling water and dew condensation water are drained out of the washing / drying machine through the drain valve 10.

  As described above, the conventional washing and drying machine has a rotating tub by circulating hot air in the circulation path of the heater 13, the blower 12, the air supply port 14, the rotating tub 5, the water tub 3, the exhaust port 16, and the circulation duct 15. The garment 4 in 5 is dried.

  However, in the configuration of the above conventional washer-dryer, the heat used for drying the garment 4 is all discarded to the outside by heat exchange with cooling water flowing through the circulation duct 15 or heat radiation from the housing 1. It was never reused.

  Therefore, a compressor for compressing the refrigerant, a radiator for dissipating the heat of the compressed refrigerant, a throttle means for reducing the pressure of the high-pressure refrigerant, and heat from the surroundings by the reduced-pressure refrigerant. It has been proposed that the heat absorber to be taken is connected by a pipe line so that the refrigerant circulates to constitute a heat pump device, and the heat pump device is provided in a washing and drying machine (for example, see Patent Document 1).

  According to this configuration, moisture evaporated from the clothing is condensed by the heat absorber, so that the clothing can be efficiently dried, and the heat of the warm air containing moisture from the clothing is absorbed by the heat absorber and compressed. Increase the temperature of the refrigerant returned to the machine.

Therefore, when the temperature of the refrigerant discharged from the compressor further rises and is radiated by the radiator, the warm air is reheated at a higher temperature, and heat can be effectively utilized.
JP 7-178289 A

  The heat pump type drying device performs heat absorption by dehumidifying the moisture of clothing wet with the heat sink as described above, and uses it as a heat absorption source for the refrigeration cycle, and further adds electrical input to drive the compressor. The air is heated by a heat radiator, and the operation of further evaporating the moisture of the clothes is repeated.

  However, in the conventional heat pump type drying apparatus, it takes time for the clothes to warm up and be used as the heat absorption source of the refrigeration cycle, and during this time, the compressor pressure is unlikely to rise.

  In particular, when the temperature of clothing is low, or when the outside air temperature is low, such as in winter, and the temperature of the washing / drying machine itself is low, the temperature of the air that circulates through the heat absorber and the radiator constituting the refrigeration cycle is also low. In order to exchange heat with this air, if the temperature of the refrigerant flowing through the heat absorber is not controlled to be lower than the circulating air temperature, energy cannot be absorbed from the air.

  For this reason, until the temperature of the circulating air reaches a certain temperature or higher, the temperature of the refrigerant flowing through the heat absorber may be 0 ° C. or less. In some cases, frost or ice adhered to the surface.

  Such a state becomes resistance of the air flow through which the frost or ice circulates, and also prevents heat exchange between the refrigerant and the air. In the heat absorber, since the circulating air is cooled as it goes downstream, the temperature on the downstream side becomes the lowest, from which frost and ice start to grow, and the resistance of the circulating air becomes the resistance. Air heat exchange will be hindered.

  Also, until the circulating air rises to a certain temperature, the generated frost repeatedly grows and melts on the surface of the heat sink, and this molten water may flow down to the lower surface of the heat sink depending on the surrounding environmental conditions. May freeze again. The re-freezing has a problem that it becomes resistance of circulating air and hinders heat exchange between the refrigerant and air.

  Furthermore, if frost or ice grows on the heat sink and the heat exchange between the air and the refrigerant becomes insufficient, the refrigerant will not be completely evaporated and will be sucked into the compressor in the liquid state. There was also a problem that it also affected.

  Also, when the superheated refrigerant gas flows in the lower part of the heat absorber, the so-called water splash phenomenon occurs in which the condensed water flowing down from the upper part of the heat absorber is ejected by the dry fins. There was also a problem that the temperature of the hot air blown out from the radiator is decreased due to moisture adhering to the radiator, and the drying performance is deteriorated.

  The same problem applies to a drying apparatus that targets an object to be dried other than clothing.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a drying apparatus that suppresses frost and ice growth and water splashing in a heat sink even in a situation where the outside air temperature is low.

  In order to solve the above conventional problems, the drying apparatus of the present invention is provided with a high-pressure pipe for exchanging heat of the high-pressure refrigerant cooled by the radiator at the upper part of the heat absorber.

  The dryer using the heat exchange action of the heat pump as the drying means flows a large amount of humid air through the heat absorber, so that frost or water droplets are likely to adhere to the heat absorber as described above. The frost can be melted as the temperature of the refrigerant rises even if the ventilation resistance on the surface of the heat absorber increases due to the growth of frost at low outside air temperature. It is possible to prevent a decrease in drying efficiency.

  Further, in the heat absorber, it is possible to reduce the occurrence of the so-called water splashing phenomenon in which the condensed water that has flowed down is repelled by the dry fins due to the wind pressure of the blown air and jumps out. It can suppress that it adheres to a heat radiator and the warm air temperature for drying falls, and can maintain drying performance.

  In addition, since the heat sink and the radiator can be installed close to each other to prevent water splashing, a heat pump unit with excellent compactness can be configured, and the ventilation resistance can be reduced and the drying performance is high. A compact drying apparatus can be provided.

  Since the drying apparatus of the present invention can prevent the growth of frost and ice generated in the heat absorber even when the outside air temperature is low, the efficiency of heat exchange between the air for drying and the refrigerant even in the situation where the outside air temperature is low Is suppressed, and further, the water splash phenomenon is suppressed, so that the hot air temperature can be maintained at a high temperature, and a drying apparatus having high drying performance can be realized.

  The invention according to claim 1 is decompressed by the compressor that compresses the refrigerant, the radiator that dissipates the heat of the compressed refrigerant, the throttle means for decompressing the high-pressure refrigerant, and the throttle means. The low-pressure refrigerant flows and the heat absorber that takes heat away from the surroundings is heated by the heat pump device that is connected by a conduit so that the refrigerant circulates, the accommodating portion that accommodates the object to be dried, and the radiator. Blower means for supplying air into the housing portion, and a heat exchange air passage for circulating the air in the housing portion to the heat radiator through the heat absorber, the heat radiator and the heat absorber being connected to the heat exchange air passage A high-pressure pipe section is provided for exchanging heat in the upper part of the heat absorber. The high-pressure refrigerant is disposed inside and cooled by the radiator.

  By adopting such a configuration, even in a drying device that flows a large amount of humid air to the heat absorber, the flow resistance is reduced by the growth of frost, particularly at low outside temperatures, by flowing a high-pressure refrigerant to the top of the heat absorber. Even if the heat exchange efficiency increases in the heat absorber, the frost can be melted as the temperature of the refrigerant rises, and the drying efficiency can be prevented from decreasing.

  In addition, since the condensed water that has flowed down in the heat absorber can be reduced by the occurrence of the so-called water splash phenomenon that is affected by the wind pressure of the air blown and blown off by the dry fins. Can be prevented from adhering to the radiator and lowering the hot air temperature for drying, and the drying performance can be maintained.

  Furthermore, since the above-described water splash is prevented, the heat absorber and the heat radiator can be installed close to each other, so that a heat pump unit with excellent compactness can be configured, the ventilation resistance is low, and the drying performance is high. A compact drying apparatus can be realized.

  According to a second aspect of the present invention, there is provided a compressor that compresses the refrigerant, a radiator that dissipates heat of the compressed refrigerant, a throttle unit that depressurizes the high-pressure refrigerant, and a pressure reduced by the throttle unit. The low-pressure refrigerant flows and the heat absorber that takes heat away from the surroundings is heated by the heat pump device that is connected by a conduit so that the refrigerant circulates, the accommodating portion that accommodates the object to be dried, and the radiator. Blower means for supplying air into the housing portion, and a heat exchange air passage for circulating the air in the housing portion to the heat radiator through the heat absorber, the heat radiator and the heat absorber being connected to the heat exchange air passage A high-pressure pipe section is provided that heat-exchanges the high-temperature and high-pressure refrigerant discharged from the compressor at the upper portion of the heat absorber.

  Even with this configuration, similarly to the effect of the first aspect, even when the heat exchange efficiency of the heat absorber decreases due to the growth of frost particularly at low outside air temperature, the frost is increased with the temperature rise of the refrigerant. It can be dissolved, and a reduction in drying efficiency can be prevented.

  Further, as described above, it is possible to reduce the occurrence of the water splash phenomenon, and it is possible to suppress a decrease in the temperature of the drying hot air due to this, and to maintain the drying performance.

  Furthermore, as described above, the compact arrangement of the heat absorber and the heat radiator makes it possible to realize a compact drying device that has excellent compactness, low ventilation resistance, and high drying performance.

  According to a third aspect of the present invention, the high-pressure pipe section is arranged on the downstream side of the heat absorber in the air flow in the heat exchange air passage.

  By adopting such a configuration, the air passing through the heat absorber becomes colder as it travels downstream, but since the high-pressure pipe is installed on the downstream side, the surface of the heat absorber even under conditions where the outside air temperature is low It is possible to prevent the condensed water from growing into frost or ice, and to prevent water splashing from the heat absorber, thereby realizing a drying apparatus with excellent drying performance.

  According to a fourth aspect of the present invention, a superheated region of a low-pressure refrigerant in the heat absorber is provided in the upper part of the heat absorber.

  With this configuration, since the low-pressure superheated refrigerant gas flows above the heat absorber, the above-described water splash phenomenon can be prevented, and a drying apparatus having excellent drying performance can be realized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
1 is an external perspective view of a washing and drying machine according to Embodiment 1 of the present invention, and FIG. 2 is a drying process viewed from the back 1b direction of the housing 1 based on a section taken along line II-II in FIG. FIG. 3 is a partially cutaway sectional view of the housing 1 viewed from the right side surface 1c direction based on the section taken along line III-III in FIG. It is a system conceptual diagram which shows the structure of the heat pump apparatus mounted in the said washing dryer, and the flow of drying air. In addition, about the same component as the washing dryer in a prior art example, the same code | symbol is attached | subjected and demonstrated.

  The washing / drying machine according to the first embodiment is a so-called domestic washing / drying machine intended for clothes and the like, and as shown in FIGS. 1 to 3, the inside of the casing 1 constituting the main body of the washing / drying machine. A cylindrical water tank 3 elastically supported by a plurality of suspensions 2 is provided, and the suspension 2 absorbs vibrations of the water tank 3 during washing and dewatering.

  Further, inside the water tank 3, a cylindrical and horizontal axis type rotating tank 5 (accommodating section) that accommodates a laundry to be dried (hereinafter referred to as clothing) 4 to be washed or dried such as clothes is rotated. It is provided as possible. The rotating tub 5 is configured to be driven to rotate by rotating a rotating shaft 6 a by a drive motor 6. Further, a plurality of baffles (not shown) for stirring the clothes 4 are provided on the inner wall of the rotating tub 5, and a plurality of small holes 5 a are provided on the peripheral wall of the rotating tub 5.

  On the front surface of the housing 1, there are provided an opening 1a for taking in and out the garment 4 and a door 7 for opening and closing the opening 1a.

  Further, openings 3a and 5b for taking in and out are also provided on the front side of the water tank 3 and the rotary tank 5, respectively. The opening 3 a of the water tank 3 is water-tightly connected to the opening 1 a of the housing 1 by a bellows 8.

  Further, a drain port (not shown) for discharging the washing water in the water tank 3 is provided at the bottom of the water tank 3, and by operating a drain valve (not shown), the water in the water tank 3 is The drainage port is configured to be discharged out of the washing / drying machine through a drainage valve and a drainage hose 11.

  The blower 12 constituting the blowing means is provided on the outer peripheral surface of the water tank 3 so as to be positioned in a corner space (upper part of the housing 1) formed by the upper surface 1d of the housing 1 and the water tank 3, and is driven by a motor 12a. Driven. A suction duct 16a opened above the water tank 3 is provided on the suction side, and a blowout duct 20a having a predetermined length is provided on the blowout side.

  Furthermore, a heat pump device 30 is provided at the lower back of the housing 1. This heat pump device 30 has a configuration in which a heat absorber 21 and a heat radiator 23 each constituted by a fin tube type heat exchanger are arranged in a circulation duct 25 that also serves as an outer shell case. Are connected to a heat absorbing air passage 22 and a heat radiating air passage 24, which will be described later.

  The heat absorber 21 and the radiator 23 are positioned so that the wind flows in the same direction (right to left in FIG. 3) at a certain distance, and the lower end of the heat absorber 21 and the radiator 23 are made larger than the upper end. It is arranged to be a letter. Due to the spread of the lower end, the flow of the airflow is smoothed when forming an airflow that flows in from above and passes through the heat absorber 21 and the radiator 23 in the circulation duct 25 to flow upward.

  Further, the blowout duct 20a and the circulation duct 25 of the blower 12 communicate with each other through the heat absorber air passage 22 so that the wind flows in the order from the heat absorber 21 to the heat radiator 23 in the circulation duct 25. The circulation duct 25 and the water tank 3 communicate with each other via the heat radiation air passage 24 and the air supply duct 20b so that the wind in the circulation duct 25 is supplied into the water tank 3.

  The rotary tank 5 is provided with a plurality of air supply ports 14 for introducing the air flowing into the water tank 3 from the air supply duct 20b into the rotary tank 5. A labyrinth seal mechanism 32 is provided at an appropriate location between the water tank 3 and the rotary tank 5 so that the introduction into the rotary tank 5 can be efficiently performed.

  Furthermore, the connection duct 19 formed in the shape of a bellows so that it may be flexible is provided in each connection part of the blowing duct 20a and the heat absorber air path 22, and the radiator air path 24 and the air supply duct 20b. ing. Due to the flexible action of the connection duct 19, vibration transmission between the water tank 3 and the heat pump device 30 is reduced.

  Furthermore, the heat absorber air passage 22, the heat radiator air passage 24, and the circulation duct 25 can be configured integrally and compactly by, for example, a resin molding method, and thus are a limited space of the housing 1 as a heat pump unit. It is fixed to the lower back.

  The suction duct 16a, the blowout duct 20a, the air supply duct 20b, the heat absorber air passage 22, and the radiator air passage 24 constitute the heat exchange air passage of the present invention, but depending on the configuration of the washing and drying machine. However, the present invention is not limited to the configuration shown in FIG.

  In addition, a water storage chamber 29 for storing condensed water flowing down from the heat absorber 21 is provided at the lower portion of the heat absorber 21. The condensed water in the water storage chamber 21 is pumped out by the drain pump 31 and discharged from the drain hose 11 to the outside of the apparatus.

  Further, as shown in FIG. 4, the refrigerant circuit of the heat pump device 30 includes a vertical compressor 26 that compresses the refrigerant, a radiator 23 that radiates heat of the compressed refrigerant, and the pressure of the high-pressure refrigerant. A throttle means 27 composed of a throttle valve, a capillary tube or the like for depressurization and a heat absorber 21 for depressurizing and depressurizing the refrigerant to take heat from the surroundings are connected by a conduit 28 so that the refrigerant circulates. The refrigerant flows in the direction indicated by the arrow h and circulates to realize a heat pump cycle. In addition, the said refrigerant | coolant employ | adopts the combustible refrigerant | coolant with little influence on an environment.

  Further, the piping of the heat absorber 21 is arranged in two rows in the front and rear direction, and a high-pressure pipe portion 23a through which the refrigerant that has passed through the radiator 23 flows is provided in the upper part on the leeward side.

  Accordingly, the high-pressure pipe portion 23a in the heat absorber 21 is in a state where the temperature is higher than other portions (the refrigerant pipe portion that has passed through the throttle means 27).

  The operation of the washing / drying machine having the above configuration will be described.

  In the washing (washing) process, water is supplied into the water tank 3 by opening the water supply valve (not shown) with the drain valve (not shown) closed.

  Then, water is supplied into the water tank 3 until a predetermined water level is reached, and the drive motor 6 is driven to rotate the rotating tank 5 containing the clothes 4 and the washing water to perform washing.

  Also in the next rinsing step, water is supplied into the water tub 3 and the garment 4 is then rinsed by rotating the rotating tub 5 in the same manner as the washing step described above.

  In the next dehydration step, the drain valve is opened to drain the water in the water tank 3 to the outside of the washing and drying machine, and then the rotating tank 5 containing the clothing 4 is unidirectionally rotated at high speed by the drive motor 6, and the centrifugal separation is performed. Dehydrate by force.

  And when the above-mentioned dehydration process is complete | finished, it will move to the drying process shown in FIG. In this drying process, the vertical compressor 26 of the heat pump device 30, the drive motor 6, the motor 12a, and the drainage pump 31 are operated.

  Therefore, the refrigerant is compressed by the operation of the compressor 26 and is circulated through the radiator 23, the throttle means 27, and the heat absorber 21 by this pressure.

  Then, the radiator 23 releases heat by the compression of the refrigerant, and the heat absorber 21 absorbs the heat by the refrigerant that has been decompressed by the expansion means 27 and has become a low pressure.

  In parallel with this, the blower 12 is operated, and the warm air heated by the heat radiation of the radiator 23 is blown into the rotary tank 5 through the air supply path 14 from the air supply port 14.

  The rotating tub 5 is rotationally driven by a drive motor 6 and the internal clothing 4 is stirred up and down.

  Accordingly, the drying air is heated by the radiator 23 by the blower 12 and is blown into the rotary tank 5 from the air supply port 14. The hot air supplied into the rotating tub 5 takes moisture when passing through the gaps in the clothing 4, and in a wet state, passes through the blower 12 from the suction duct 16a of the water tub 3 and enters the heat absorber 21 as indicated by an arrow e. It reaches. When the wet warm air passes through the heat absorber 21, sensible heat and latent heat are removed, and the dehumidified air is separated into dry air and condensed water.

  When the dry air subsequently passes through the radiator 23, it is heated again by the radiator 23 to become warm air, and flows from the radiator air passage 24 to the air supply duct 20b as indicated by an arrow f, and again in the water tank 3 And is supplied into the rotary tank 5. Thereafter, the above-described circulation is repeated.

  Condensed water flowing down from the heat absorber 21 is stored in a water storage chamber 29 provided at the lower portion of the heat absorber 21, and is discharged from the drain hose 11 to the outside through the drain pump 31.

  By using the heat pump device 30 in this manner, the heat absorbed by the heat absorber 21 is recovered by the refrigerant, and again radiated by the heat radiator 23, so that the amount of heat greater than the energy input to the vertical compressor 26 is given to the clothing 4. Therefore, drying efficiency can be improved.

  Therefore, shortening of drying time and energy saving can be realized.

  Further, as shown in FIG. 4, the high-temperature and high-pressure refrigerant discharged from the vertical compressor 26 flows in the h direction in the pipe 28, is condensed by the radiator 23, and is the high-pressure pipe portion 23 a of the heat absorber 21. Is passed through the expansion device 27 and then flows through the low pressure path of the heat absorber 21 and returns to the vertical compressor 26.

  As described above, since the high pressure pipe portion 23a is installed on the upper portion of the heat absorber 21, even when the temperature of the refrigerant flowing through the heat absorber 21 is 0 ° C. or lower when the outside air temperature is low, the high pressure pipe portion 23a. It is possible to suppress the growth of frost and ice generated in the heat absorber 21 by the heat of. In addition, since the return refrigerant of the compressor 26 exchanges heat with the high-pressure pipe portion 23a in the upper part of the heat absorber 21, it is gasified by the heat exchange action even when the liquid component is large due to refrigeration cycle load fluctuation or the like. It is also possible to configure so as to promote the above and prevent liquid compression of the compressor 26.

  As a result, even in a situation where the outside air temperature is low, heat exchange efficiency between the drying air and the refrigerant can be ensured, and further, the condensed water does not pass through the superheated refrigerant gas region in the heat absorber 21, so that the water jump phenomenon is suppressed. The hot air temperature blown out from the radiator 23 can be kept high, and the drying performance can be kept high.

  In the case of the heat absorber 21 in which the high-pressure pipe portion 23a is not provided because the high-pressure pipe portion 23a provided in the heat absorber 21 is arranged on the downstream side (leeward side) in the air flow direction in the circulation duct 25. However, in this Embodiment 1, since the high-pressure piping part 23a is arrange | positioned in the downstream, the heat absorber 21 of the heat sink 21 is also in the condition where the outside air temperature is low. It is possible to suppress the condensed water on the surface from growing into frost or ice, and it is possible to keep the drying performance high in combination with preventing water jumping from the heat absorber 21.

  Furthermore, since the above-mentioned water splash is prevented, the heat absorber 21 and the radiator 23 can be installed close to each other, and a heat pump unit having excellent compactness can be configured. As a result, a compact drying apparatus with high drying performance can be provided.

  In addition, in this Embodiment 1, although it has set as the structure which provided the opening part 1a for taking in / out the clothing 4 in the surface opposite to the surface of the water tank 3 which has the drive motor 6 of the rotation tank 5, this opening part 1a is not limited to the said place, You may set in any position of the water tank 3 and the rotation tank 5. FIG.

  Also, the form of the washing / drying machine is not limited to the drum type washing / drying machine, but can be applied to a pulsator-type vertical washing / drying machine and does not depart from the technical scope of the present invention. Absent.

  Furthermore, although the refrigerant used for the heat pump device 30 is a flammable refrigerant, carbon dioxide or an HFC refrigerant, which is a natural refrigerant, may be used, and the compressor 26 is not limited to a vertical type, but a horizontal type. Also good.

(Embodiment 2)
FIG. 5 is a system conceptual diagram showing the configuration of the heat pump device mounted on the washing and drying machine and the flow of drying air in Embodiment 2 of the present invention. Note that the same constituent elements as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In FIG. 5, the part different from the first embodiment is the state of the refrigerant flowing through the high-pressure piping part 23 a provided in the heat absorber 21.

  That is, in the first embodiment, the high-pressure refrigerant after passing through the radiator 23 is allowed to flow, but in the present embodiment 2, the refrigerant is discharged from the compressor 26 before flowing through the radiator 23. A refrigerant is allowed to flow.

  Therefore, the temperature of the refrigerant flowing through the high-pressure pipe portion 23a is higher than the temperature of the first embodiment, and the ability of the heat absorber 21 to prevent frost formation or icing water is increased.

  As a result, the area (volume) occupied by the high-pressure pipe portion 23a in the heat absorber 21 can be reduced, and in addition to the operational effects of the first embodiment, the operational effects can be exhibited even when the outside air temperature is lower. Reliability can be ensured.

(Embodiment 3)
FIG. 6 is a system conceptual diagram showing the configuration of the heat pump device mounted on the washing / drying machine and the flow of drying air in Embodiment 3 of the present invention. Note that the same constituent elements as those of the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  In FIG. 6, the difference from the first and second embodiments is that the refrigerant immediately after exiting the throttle means 27 and the refrigerant flowing through the high-pressure pipe portion 23 a provided in the heat absorber 21 are in a state where heat can be easily exchanged. As you can see, the piping is being routed.

  Therefore, since the refrigerant outlet where the superheated region of the low-pressure refrigerant in the heat absorber 21 exists is provided in the upper part of the heat absorber 21, the superheated refrigerant gas flows in the upper part of the heat absorber 21, and thus is generated in the heat absorber 21. It is possible to prevent a water splash phenomenon in which condensed water is repelled and jumps out at the lower part of the heat absorber 21, and the drying performance can be kept high.

  In each of the above embodiments, the high-pressure pipe portion is incorporated as a part of the pipe path of the heat absorber. However, the high-pressure pipe portion is made independent and heat is appropriately added to the upper portion of the heat absorber by means. It is also possible to adopt a configuration in which replacement is possible, and it does not depart from the scope of the present invention.

  As described above, the drying apparatus of the present invention is configured to flow the high-temperature and high-pressure refrigerant discharged from the compressor to the upper part of the heat absorber, and can maintain the hot air temperature at a high temperature. The present invention can be widely applied as a drying apparatus equipped with a heat pump system that uses foods such as grains, vegetables, or fresh fish.

1 is an external perspective view of a washing / drying machine according to Embodiment 1 of the present invention. Partially cutaway sectional view at the time of the drying process seen from the back direction of the washing and drying machine of the embodiment Partially cutaway cross-sectional view during the drying process as seen from the side direction of the washing and drying machine of the embodiment The conceptual diagram which shows the system structure of the washing-drying machine of the embodiment The conceptual diagram which shows the system configuration | structure of the washing dryer in Embodiment 2 of this invention. The conceptual diagram which shows the system configuration | structure of the washing dryer in Embodiment 3 of this invention. Sectional view of a washing and drying machine showing a conventional example

Explanation of symbols

3 Water tank 4 Clothes (to be dried)
5 Rotating tank (container)
12 Blower (Blower means)
16a Suction duct 21 Heat absorber 20a Blowout duct 20b Air supply duct 22 Heat absorber air passage 23 Radiator 23a High pressure piping section 24 Heat radiator air passage 25 Circulation duct 26 Compressor 27 Throttle means 28 Pipe 30 Heat pump device

Claims (4)

  A compressor that compresses the refrigerant; a radiator that dissipates heat of the compressed refrigerant; a throttle unit that depressurizes the high-pressure refrigerant; and a refrigerant that has been reduced in pressure by the throttle unit flows. A heat pump device in which a heat absorber that removes heat from the surroundings is connected by a pipe line so that the refrigerant circulates, a housing portion that accommodates an object to be dried, and an air supply that supplies air heated by the radiator to the housing portion And a heat exchange air passage for circulating the air in the housing portion through the heat absorber to the heat radiator, the heat radiator and the heat absorber are disposed in the heat exchange air passage, and the heat dissipation The drying apparatus provided with the high voltage | pressure piping part which heat-exchanges the high voltage | pressure refrigerant | coolant cooled with the container in the upper part of the said heat absorber.   A compressor that compresses the refrigerant; a radiator that dissipates heat of the compressed refrigerant; a throttle unit that depressurizes the high-pressure refrigerant; and a refrigerant that has been reduced in pressure by the throttle unit flows. A heat pump device in which a heat absorber that removes heat from the surroundings is connected by a pipe line so that the refrigerant circulates, a housing portion that accommodates an object to be dried, and an air supply that supplies air heated by the radiator to the housing portion And a heat exchange air passage for circulating the air in the housing portion through the heat absorber to the heat radiator, the heat radiator and the heat absorber are disposed in the heat exchange air passage, and the compression A drying apparatus provided with a high-pressure piping section for exchanging heat at a high temperature and high pressure refrigerant discharged from the machine at the upper part of the heat absorber.   The drying apparatus according to claim 1 or 2, wherein the high-pressure pipe section is disposed on the downstream side of the heat absorber in the air flow in the heat exchange air passage.   The drying device according to any one of claims 1 to 3, wherein a superheated region of a low-pressure refrigerant in the heat absorber is provided in an upper portion of the heat absorber.

Images