JP2015102289A - Portable air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable air conditioner which enables improvement of wearability and mobility.SOLUTION: An inner fan 41 is disposed in an inner passage 23 of an annular member 20 and an inner side surface 34a of a peltier element 30 is exposed. An outer side surface 35a of the peltier element 30 is exposed on an outer peripheral surface 22 of the annular member 20. An exhaust groove 25 of the annular member 20 opens so that inner air in the inner passage 23, which is exhausted as air conditioned air, flows along the outer peripheral surface 22 of the annular member 20 and is formed so as to narrow toward the opening side.

Description

  The present invention relates to a portable air conditioner.

  In recent years, an air conditioner for comfortably moving gaps such as moving from home to car, from station to office, and from room to room, and an air conditioner that realizes air conditioning suitable for each person, that is, a portable air conditioner (wearable air conditioner) As a technique related to such a portable air conditioner, a clothing temperature control device disclosed in Patent Document 1 below is known.

  This clothing temperature control device is divided into two spaces by a partition plate in the body case in which the blower and the heat absorption / heating element (thermoelectric element) are housed, and one space has an air supply hole leading to the clothing intake. An exhaust hole is provided in the other space. The heat-absorbing / heating element is arranged so that one surface is exposed in one space and the other surface is exposed in the other space. Further, the blower is arranged so as to send outside air taken in from the intake hole to each surface of the heat absorption / heat generation element.

  During cooling, one surface of the endothermic / heat generating element is in an endothermic state, so that the outside air taken in from the intake hole through the one space by the blower is cooled by the one surface and covered from the air supply hole. Sent in. At that time, the outside air sent to the other space is exhausted out of the main body case from the exhaust hole so as to cool the other surface of the heat absorption / heat generation element. Thereby, the influence of Joule heat generated in the endothermic / heat generating element is suppressed.

Japanese Patent Laid-Open No. 08-232104

  However, in the configuration as described above, air that has been air-conditioned by the thermoelectric element is sent out into the clothing using the airflow blown from the blower, so that a blower with a large output is used to blow the air-conditioned air over a wider range. It is necessary to adopt. For this reason, there is a problem that not only the blower is increased in size but also the power consumption is increased, so that the battery is also increased in size and wearability and mobility are deteriorated.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a portable air conditioner that can improve wearability and mobility.

In order to achieve the above object, the invention according to claim 1 of the claims has an internal passage (23) provided inside and an exhaust groove (25) communicating the internal passage with the outside air. And an annular member (20, 20c) formed on the inner surface and a pair of surfaces in which a temperature difference occurs according to the supplied current. One surface (34a) is exposed in the internal passage and the other surface (35a) ) Is a portable air conditioner (10, 10a to 10c) comprising a thermoelectric element (30) exposed on the outer peripheral surface (22) of the annular member, and a blowing means (41) disposed in the internal passage. The exhaust groove is formed so that the inside air in the internal passage, which is discharged as conditioned air, opens so as to follow the outer peripheral surface of the annular member, and becomes narrower toward the opening side.
In addition, the code | symbol in the parenthesis of a claim and the said means shows a corresponding relationship with the specific means as described in embodiment mentioned later.

  According to the first aspect of the present invention, the air blowing means is disposed in the internal passage of the annular member, one surface of the thermoelectric element is exposed, and the other surface of the thermoelectric element is exposed on the outer peripheral surface of the annular member. The exhaust groove of the annular member is formed so that the inside air in the internal passage discharged as conditioned air opens along the outer peripheral surface of the annular member and becomes narrower toward the opening side.

  For this reason, when the thermoelectric element and the air blowing unit operate in a state where the portable air conditioner is mounted so as to cover the arm, the trunk, and the like on the inner peripheral surface of the annular member, the inside air whose temperature is adjusted on one surface of the thermoelectric element Is discharged from the exhaust groove as conditioned air through the internal passage. Thereby, the conditioned air from the exhaust groove is blown to the arms, the trunk, and the like. In particular, when the inside air passing through the exhaust groove is throttled, a venturi effect that is reduced as the wind speed increases is generated, and outside air near the opening of the exhaust groove is caught in the conditioned air that is discharged in a reduced pressure state. The air volume increases. For this reason, a sufficient air volume can be ensured even when a small air volume blowing means, that is, a small and power-saving air blowing means is employed, so that the wearability and mobility of the portable air conditioner can be improved.

It is a perspective view which shows schematic structure of the portable air conditioner which concerns on 1st Embodiment. It is a top view of a portable air conditioner. It is a block diagram which shows roughly the electric structure of a portable air conditioner. It is sectional drawing which shows the XX cross section of FIG. It is explanatory drawing explaining the structure of a Peltier device. It is a part of flowchart which illustrates the flow of the air-conditioning process implemented in a control part. It is a part of flowchart which illustrates the flow of the air-conditioning process implemented in a control part. It is sectional drawing explaining the flow of the air conditioned wind discharged | emitted from an exhaust groove. It is explanatory drawing which illustrates the state which mounted | wore with the portable air conditioner. It is explanatory drawing explaining the state which suspended and used the portable air conditioner. It is a perspective view which shows schematic structure of the portable air conditioner which concerns on the modification of 1st Embodiment. It is sectional drawing which shows the principal part of the portable air conditioner which concerns on 2nd Embodiment.

[First Embodiment]
Hereinafter, a first embodiment in which a portable air-conditioning apparatus according to the present invention is embodied will be described with reference to the drawings.
The portable air conditioner 10 according to the present embodiment is configured as a portable air conditioner, and its portability is enhanced by being formed in an annular shape (strip shape) so that it can be attached to an arm, a trunk or the like. ing. Specifically, as shown in FIGS. 1 to 3, the portable air conditioner 10 mainly includes an annular member 20, a Peltier element 30, an internal fan 41, an external fan 42, a sensor 43, an operation unit 44, and a display unit. 45, a control unit 46 and a power supply unit 47.

  The annular member 20 constitutes the outline of the portable air conditioner 10, and the diameter of the inner peripheral surface 21 and the outer peripheral surface 22 is set in accordance with an attachment target such as an arm or a trunk. The annular member 20 has a non-stretchable portion 20a formed of a synthetic resin or the like and a stretchable stretchable portion 20b formed of an elastic body such as rubber. The inner diameter dimension of the peripheral surface 21 can be adjusted, and the mountability of the portable air conditioner 10 is improved. Further, the non-stretchable portion 20a is formed so that its circumferential length is longer than that of the stretchable portion 20b.

  Inside the non-stretchable portion 20a and the stretchable portion 20b, an internal passage 23 that communicates in an annular shape is provided, and an intake port 24 and an exhaust groove 25 communicate with the internal passage 23. The intake port 24 is provided in at least one place on the outer peripheral surface 22, and the opening area is set according to the air flow rate of the internal fan 41. The intake port 24 is provided with a filter or the like that allows outside air to pass therethrough and prevents entry of dust and the like.

  The exhaust groove 25 is provided over the entire lower edge of the non-stretchable portion 20a, so that the exhaust groove 25 is provided over a half or more of the lower edge of the annular member 20. The detailed shape of the exhaust groove 25 and the outer peripheral surface 22 in the vicinity of the exhaust groove 25 will be described in detail with reference to FIG. FIG. 4 is a cross-sectional view showing the XX cross section of FIG.

  As shown in FIG. 4, the exhaust groove 25 is formed so that its cross section becomes narrower toward the opening side. As a result, the inside air passing through the exhaust groove 25 is throttled, and when the inside air in the internal passage 23 is discharged as the conditioned air through the exhaust groove 25, the air speed of the conditioned air increases and the pressure is reduced. Venturi effect occurs.

  Further, the exhaust groove 25 is formed so that the direction of the opening is obliquely upward so that the conditioned air discharged from the opening is easily along the outer peripheral surface 22. Of the outer peripheral surface 22 of the non-stretchable portion 20a, the surface along which the conditioned air is conditioned makes it easier to follow the conditioned air along the outer peripheral surface 22, so that the upstream side 22a relating to the conditioned air is curved convexly with respect to the downstream side 22b. Is formed. Thereby, the outer peripheral surface 22 of the upstream side 22a functions as a Coanda surface that exerts a Coanda effect that draws in air-conditioned air or airflow from the surroundings.

  As shown in FIG. 5, the Peltier device 30 includes a plurality of n-type semiconductors 31 and p-type semiconductors 32 that are alternately arranged, electrodes 33 that electrically connect these semiconductors 31 and 32 in series, and each electrode 33. Among them, a ceramic plate 34 joined to the electrode 33 arranged on one side and a ceramic plate 35 joined to the electrode 33 arranged on the other side are provided. In the Peltier element 30, the outer surface 35 a of the ceramic plate 35 is exposed at a position away from the intake port 24 in the outer peripheral surface 22 of the annular member 20, and the inner surface 34 a of the ceramic plate 34 is exposed in the internal passage 23. Are arranged as follows.

  The Peltier element 30 functions as a thermoelectric element that generates a temperature difference between the inner surface 34 a of the ceramic plate 34 and the outer surface 35 a of the ceramic plate 35 by supplying a direct current to the electrode 33. Depending on the orientation, the cooling state can be switched between a cooling state in which the temperature of the ceramic plate 34 is lower than that of the ceramic plate 35 and a heating state in which the temperature of the ceramic plate 34 is higher than that of the ceramic plate 35. That is, when the Peltier element 30 is in the cooling state, the internal air in the internal passage 23 is cooled by the inner side surface 34a of the ceramic plate 34, and in the heating state, the internal air in the internal passage 23 is heated by the inner side surface 34a of the ceramic plate 34. . The inner surface 34a of the ceramic plate 34 may correspond to an example of “one surface”, and the outer surface 35a of the ceramic plate 35 may correspond to an example of “the other surface”.

  The internal fan 41 is disposed in the internal passage 23 in the vicinity of the intake port 24, and the amount of air (the number of rotations) can be adjusted according to control by the control unit 46, and the outside air taken in from the intake port 24 can be adjusted. It functions as a blowing means for blowing air into the internal passage 23.

  The external fan 42 is disposed on the outer peripheral surface 22 in the vicinity of the Peltier element 30, and the air around the outer surface 35 a is blown toward the outer surface 35 a of the Peltier element 30 in accordance with control by the control unit 46. It functions as a diffusion means for diffusing.

  The sensor 43 is a sensor that has both a function as a temperature sensor that measures the temperature of the inside air in the internal passage 23 and a function as an air volume sensor that measures the amount of the inside air flowing in the internal passage 23. 24 is disposed in an internal passage 23 near 24. The sensor 43 is configured to output a temperature signal and an air volume signal corresponding to the detected temperature and air volume of the inside air to the control unit 46.

  The operation unit 44 is arranged so that a plurality of keys and the like are exposed on the outer peripheral surface 22, and functions as an operation unit that inputs information corresponding to the key operation to the control unit 46.

  The display unit 45 is arranged so that the display screen is exposed on the outer peripheral surface 22, and functions as a display unit whose display content is controlled by the control unit 46.

  The control unit 46 is responsible for overall control of the portable air conditioner 10. The control unit 46 includes, for example, a microcomputer, a memory (ROM, RAM, EEPROM, etc.), and the like. It functions to perform an air conditioning process to be described later according to a signal or the like. The control unit 46 may correspond to an example of “control means”.

  The power supply unit 47 includes a battery serving as a power supply, and functions as a power supply unit that supplies power to various electrical components such as the control unit 46 and the fans 41 and 42.

  Next, the air conditioning process performed by the control unit 46 will be described in detail with reference to FIGS. 6 and 7 are flowcharts illustrating the flow of air conditioning processing performed by the control unit 46. FIG. 8 is a cross-sectional view illustrating the flow of conditioned air discharged from the exhaust groove 25.

  In the air conditioning process according to the present embodiment, an air conditioning mode in which the temperature and air volume of the conditioned air can be adjusted and an air blowing mode in which only the air volume of the conditioned air can be adjusted are prepared. Then, after the portable air conditioner 10 is mounted so as to cover the mounting target such as the arm and the trunk on the inner peripheral surface 21, the target temperature and target air volume of the conditioned air are set according to the input operation of the operation unit 44. The air conditioning process by the control unit 46 is started by selecting the air conditioning mode that has been performed or by selecting the air blowing mode in which the target air volume of the air conditioning air is set.

  When the air conditioning mode is selected, the input target temperature and target air volume are stored in the memory as the input target air temperature Tin and the input target air volume Qin in the initial setting process shown in step S101 of FIG. In addition, control for driving the internal fan 41 at the initial rotational speed is performed. Thereby, the inside air is blown through the internal passage 23 so that outside air is taken in from the intake port 24 and discharged from the exhaust groove 25. In addition, control for driving the external fan 42 at a predetermined rotational speed is performed. Thereby, the external fan 42 operates so as to diffuse the air around the outer surface 35 a of the Peltier element 30.

  Since the air conditioning mode is selected (Yes in S103), the detection data acquisition process shown in Step S105 is performed, and the internal air in the internal passage 23 near the sensor 43 is based on the temperature signal and the air volume signal from the sensor 43. Are obtained as the detected temperature Tse and the detected air volume Qse.

  Next, when the detected temperature Tse and the detected air volume Qse are displayed on the display unit 45 in the display process shown in step S107, whether or not the detected temperature Tse is equal to or higher than the input target temperature Tin in the determination process shown in step S109. Is determined. If the detected temperature Tse is equal to or higher than the input target temperature Tin (Yes in S109), the cooling current supply process shown in step S111 is performed, and a direct current for cooling the Peltier element 30 is supplied. The

  Thereby, the internal air in the internal passage 23 is cooled by the inner side surface 34 a of the ceramic plate 34 of the Peltier element 30. On the other hand, the temperature of the outer side surface 35a of the ceramic plate 35 of the Peltier element 30 is increased, but the air around the outer side surface 35a at which the temperature is increased is diffused by blowing air from the external fan 42.

  Subsequently, in the determination process shown in step S115, it is determined whether or not the detected air volume Qse is greater than or equal to the input target air volume Qin. Here, if the detected air volume Qse is equal to or greater than the input target air volume Qin (Yes in S115), the air volume reduction process shown in step S117 is performed, and the rotational speed of the internal fan 41 is decelerated. Thereby, the air volume of the inside air flowing through the internal passage 23 is reduced.

  On the other hand, if the detected air volume Qse is less than the input target air volume Qin (No in S115), the air volume increasing process shown in step S119 is performed, and the rotational speed of the internal fan 41 is increased. Thereby, the air volume of the inside air flowing through the internal passage 23 increases.

  As described above, when the rotational speed of the internal fan 41 is increased or decreased, feedback control is performed so that the air volume of the inside air flowing in the internal passage 23 approaches the input target air volume Qin. And if there is no input operation by the operation part 44 (it is No at S121 and S123), the process from the said step S105 will be repeated.

  During this repetitive process, the outside air taken in from the intake port 24 is cooled by the inner side surface 34a of the Peltier element 30 and blown as the inside air in the internal passage 23, and this cooled inside air is squeezed from the exhaust groove 25 as conditioned air. Is discharged. At the time of this discharge, since the venturi effect that the pressure of the conditioned air increases from the inside air and the pressure is reduced occurs, as illustrated in FIG. 8, the opening of the exhaust groove 25 is opened to the conditioned air (see symbol α <b> 1 in FIG. 8). Nearby outside air (see symbol α2 in FIG. 8) is entrained and the air volume increases.

  Further, since the outer peripheral surface 22 of the non-stretchable portion 20a is formed so that the upstream side 22a with respect to the conditioned air is curved in a convex shape with respect to the downstream side 22b, the outer peripheral surface 22 functions as a Coanda surface. Thus, the air-conditioning air having an increased air volume smoothly flows along the outer peripheral surface 22. In this way, the conditioned air along the outer peripheral surface 22 is blown to the mounting target such as the arm and the trunk, so that the mounting target and its surroundings are suitably cooled in the cooling state.

  When the detected temperature Tse becomes lower than the input target temperature Tin by continuing to cool the inside air during this repeated process (No in S109), the heating current supply process shown in Step S113 is performed, and the Peltier element 30 is brought into the heating state. The direct current for becoming is supplied. Thereby, the inside air in the internal passage 23 is heated by the inner side surface 34 a of the ceramic plate 34 of the Peltier element 30. On the other hand, the temperature of the outer side surface 35a of the ceramic plate 35 of the Peltier element 30 is lowered, but the air around the outer side surface 35a at which the temperature is lowered is diffused by the blowing from the external fan 42.

  If the detected air volume Qse is greater than or equal to the input target air volume Qin (Yes in S115), the air volume by the internal fan 41 is reduced (S117), and if the detected air volume Qse is less than the input target air volume Qin (No in S115). The air volume by the internal fan 41 increases (S119). Thereby, feedback control is performed so that the temperature and air volume of the inside air flowing in the internal passage 23 approach the input target temperature Tin and the input target air volume Qin, and the conditioned air adjusted to the desired temperature and air volume is supplied to the arms, the trunk, and the like. It will be sprayed on the mounting target.

  If a change operation for changing to the air blowing mode is performed on the operation unit 44 during the repetitive processing as described above (Yes in S121), the target air volume that has been input in the initial setting process shown in step S101. Is stored in the memory as the input target air volume Qin. Since the air blowing mode is selected (No in S103), the detection data acquisition process shown in step S125 of FIG. 7 is performed, and the temperature and the air volume of the internal air in the internal passage 23 near the sensor 43 are detected and detected. Acquired as the air volume Qse. Then, the detected temperature Tse and the detected air volume Qse are displayed on the display unit 45 in the display process shown in step S127.

  If the detected air volume Qse is greater than or equal to the input target air volume Qin (Yes in S129), the air volume reduction process shown in step S131 is performed. If the detected air volume Qse is less than the input target air volume Qin (No in S129), step S133. The air volume increasing process shown in FIG. And if there is no input operation by the operation part 44 (it is No at S135 and S137), the process from said step S125 will be repeated. During this iterative process, since no current is supplied to the Peltier element 30, the temperature of the inside air is not adjusted, and feedback control is performed so that the air volume of the inside air flowing in the internal passage 23 approaches the input target air volume Qin. The conditioned air adjusted to the air volume is blown to the wearing object such as the arm and the trunk.

  When a change operation for changing to the air conditioning mode is performed on the operation unit 44 (Yes in S135), the processing from Step S101 is performed, and when an end operation is performed (Yes in S137 and S123), The air conditioning process ends.

  As described above, in the portable air conditioner 10 according to the present embodiment, the internal fan 41 is disposed in the internal passage 23 of the annular member 20 and the inner side surface 34a of the Peltier element 30 is exposed, so that the annular member 20 The outer surface 35 a of the Peltier element 30 is exposed on the outer peripheral surface 22. The exhaust groove 25 of the annular member 20 is formed so that the inside air in the internal passage 23 discharged as conditioned air is opened along the outer peripheral surface 22 of the annular member 20 and becomes narrower toward the opening side.

  For this reason, when the Peltier element 30 and the internal fan 41 are operated in a state where the portable air conditioner 10 is mounted so as to cover the mounting target such as an arm or a trunk on the inner peripheral surface 21 of the annular member 20, The inside air whose temperature is controlled by the side surface 34 a passes through the internal passage 23 and is discharged from the exhaust groove 25 as conditioned air. Thereby, the conditioned air from the exhaust groove 25 is blown to the arm, the trunk, and the like. In particular, the inside air passing through the exhaust groove 25 is throttled to produce a venturi effect that is reduced as the wind speed increases, and outside air in the vicinity of the opening of the exhaust groove 25 is entrained in the conditioned air that is discharged under reduced pressure. The air volume increases. For this reason, since sufficient air volume can be ensured even when the internal fan 41 with a small air volume, that is, a small and power-saving air blowing means is employed, the wearability and mobility of the portable air conditioner 10 can be improved.

  In particular, the surface along which the conditioned air flows along the outer peripheral surface 22 of the annular member 20 is formed such that the upstream side 22a relating to the conditioned air is curved in a convex shape with respect to the downstream side 22b, and therefore, the airflow from the surroundings due to the Coanda effect. The conditioned air whose air volume has been increased due to the airflow smoothly flows along the outer peripheral surface 22. As a result, the air-conditioning air that leaves the outer peripheral surface 22 without being blown against the mounting object is reduced, so that a sufficient air volume can be secured even when a small and power-saving air blowing means is employed. Wearability and mobility can be further improved.

  An outer fan 42 that diffuses air around the outer surface 35 a of the Peltier element 30 is provided on the outer peripheral surface 22 of the annular member 20. For this reason, warm air around the outer surface 35a generated during cooling and cold air around the outer surface 35a generated during heating, that is, air that impairs comfort, are diffused by the external fan 42. It can suppress blowing around.

  Further, a sensor 43 that measures the temperature and air volume of the inside air in the internal passage 23 is disposed in the internal passage 23, and the Peltier element is subjected to air conditioning processing performed by the control unit 46 based on the measurement result of the sensor 43. 30 and the internal fan 41 are controlled, the temperature and the air volume of the conditioned air discharged from the exhaust groove 25 can be controlled with high accuracy. Instead of the sensor 43 having both the temperature measuring function and the air volume measuring function, a temperature sensor and an air volume sensor may be individually employed.

FIG. 9 is an explanatory view illustrating a state in which the portable air conditioner 10 (10a, 10b) is mounted. FIG. 10 is an explanatory diagram illustrating a state in which the portable air conditioner 10 is suspended and used.
The portable air conditioner 10 configured in this way is conditioned air flow adjusted to a desired temperature and air volume in and around the jacket by being mounted on the trunk as illustrated by reference numeral 10a in FIG. Can be blown. Moreover, the portable air conditioner 10 can also be attached to the trunk so as to blow the conditioned air downward.

  Moreover, the portable air conditioner 10 can blow the conditioned air adjusted to a desired temperature and air volume around the wrist by being attached to the wrist as illustrated by reference numeral 10b in FIG. Moreover, the portable air conditioner 10 may be worn by wrapping it around the neck, or may be worn over the shoulder like a sack.

  Further, as illustrated in FIG. 10, the portable air conditioner 10 can also be used as a stationary air conditioner that blows conditioned air in a direction along the outer peripheral surface 22 by suspending the portable air conditioner 10 on a hanging tool 50 or the like. . Further, the portable air conditioner 10 can be used as a stationary air conditioner by simply placing it on a stand or the like without using the hanging tool 50 or the like. The portable air conditioner 10 may be mounted by passing it through an umbrella handle or a bicycle handle.

FIG. 11 is a perspective view illustrating a schematic configuration of a portable air conditioner 10c according to a modification of the first embodiment.
As a portable air conditioner 10c according to a modification of the first embodiment, a plurality of Peltier elements 30 may be provided as illustrated in FIG. In the example shown in FIG. 11, for example, three Peltier elements 30 are arranged along the inner passage 23 such that the inner side surface 34 a is exposed in the inner passage 23 and the outer side surface 35 a is exposed in the outer peripheral surface 22. . Accordingly, since the time until the detected temperature Tse approaches the target temperature Tin is shortened, the temperature adjustment of the conditioned air can be performed in a short time.

[Second Embodiment]
Next, a portable air conditioner according to a second embodiment of the present invention will be described with reference to FIG. FIG. 12 is a cross-sectional view showing a main part of the portable air conditioner according to the second embodiment.
In this 2nd Embodiment, in order to increase a ventilation direction, it replaces with the annular member 20 and the point which employ | adopts the annular member 20c mainly differs from the said 1st Embodiment. For this reason, substantially the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 12, the annular member 20 c divides a part of the internal passage 23 in the non-stretchable portion 20 a into an outer peripheral side including the exhaust groove 25 and an inner peripheral side with respect to the annular member 20 described above. The partition plate 26 is formed along the circumferential direction so as to face the exhaust groove 25. A plurality of through-holes 27 communicating with the outside air are provided along the circumferential direction on the inner peripheral side of the wall surface partitioned by the partition plate 26.

  Thereby, when the inside air flowing through the internal passage 23 after being adjusted to a desired temperature and air volume is exhausted through the exhaust groove 25, the inside air is conditioned air through each through hole 27 (reference numeral in FIG. 12). (see α3). Since the conditioned air from the through hole 27 is blown in the opposite direction to the conditioned air flowing along the outer peripheral surface 22 from the exhaust groove 25, the area where the conditioned air is blown by the portable air conditioner can be increased. .

In addition, this invention is not limited to said each embodiment and modification, For example, you may actualize as follows.
(1) In the air conditioning process, the supply of current to the Peltier element 30 may be stopped if the difference between the detected temperature Tse and the input target temperature Tin is within a predetermined value set in advance. Thereby, since the electric current supplied to the Peltier device 30 can be reduced, power consumption can be further reduced.

(2) The means for adjusting the temperature of the internal air in the internal passage 23 of the annular member 20 is not limited to the use of the Peltier element 30, but has a pair of surfaces that generate a temperature difference according to the supplied current. Other thermoelectric elements in which the other surface is exposed in the internal passage 23 and the other surface is exposed on the outer peripheral surface 22 of the annular member 20 may be adopted.

(3) When a portable air conditioner is used exclusively for cooling, a heat sink for radiating the outer surface 35a of the Peltier element 30 may be used. By blowing air from the external fan 42 to the heat sink, heat dissipation from the outer surface 35a of the Peltier element 30 can be further promoted. The external fan 42 may be eliminated by adopting a heat sink as the diffusing means.

(4) In the air conditioning process, mode selection and input target temperature Tin and input target air volume Qin may be set in accordance with instruction information transmitted from an external device such as a smartphone. Moreover, you may transmit the information regarding detected temperature Tse, detected air volume Qse, etc. with respect to this external apparatus.

DESCRIPTION OF SYMBOLS 10,10a-10c ... Portable air conditioner 20, 20c ... Ring member 21 ... Outer peripheral surface 23 ... Internal passage 25 ... Exhaust groove 30 ... Peltier device (thermoelectric device)
34a ... Inner surface (one surface)
35a ... Outer surface (the other surface)
41. Internal fan (air blowing means)
42 ... External fan (diffusion means)
43 ... Sensor (temperature sensor, air volume sensor)
46. Control unit (control means)

Claims (8)

An annular member (20, 20c) having an internal passage (23) provided inside and an exhaust groove (25) communicating the internal passage with the outside air,
It has a pair of surfaces where a temperature difference occurs according to the supplied current, one surface (34a) is exposed in the internal passage, and the other surface (35a) is exposed on the outer peripheral surface (22) of the annular member. A thermoelectric element (30) to
Air blowing means (41) disposed in the internal passage;
A portable air conditioner (10, 10a to 10c) comprising:
The portable air conditioner is characterized in that the exhaust groove is formed so that the inside air in the internal passage, which is discharged as conditioned air, opens along the outer peripheral surface of the annular member and becomes narrower toward the opening side. .   2. The surface along which the conditioned air along the outer peripheral surface of the annular member is formed such that the upstream side (22 a) of the conditioned air is curved in a convex shape with respect to the downstream side (22 b). The portable air conditioner described in 1.   The portable air conditioner according to claim 1 or 2, wherein the exhaust groove is provided so as to extend over at least a half of the annular member.   The diffuser means (42) which diffuses the air around the said other surface of the said thermoelectric element is provided in the outer peripheral surface of the said annular member, The Claim 1 characterized by the above-mentioned. Portable air conditioner. A temperature sensor (43) for measuring the temperature in the internal passage;
An air volume sensor (43) for measuring the air volume of the inside air flowing in the internal passage;
Control means (46) for controlling the thermoelectric element and the air blowing means based on the measurement results of the temperature sensor and the air volume sensor;
The portable air conditioner according to any one of claims 1 to 4, further comprising:   The portable air conditioner according to any one of claims 1 to 5, wherein the internal passage is formed in an annular communication.   A part of said annular member is formed with the elastic body (20b) which can be expanded-contracted, The portable air conditioner as described in any one of Claims 1-6 characterized by the above-mentioned. In the internal passage, a partition plate (26) that partitions a part of the internal passage into an outer peripheral side including an exhaust groove and an inner peripheral side is provided on the wall surface,
The portable air conditioner according to any one of claims 1 to 7, wherein a through hole (27) is formed on an inner peripheral side of the wall surface.

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