JP5355730B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner used to adjust the temperature of an air-conditioning target area such as a house or a facility, and more specifically, air-conditioning elements for heat absorption or heat radiation along the longitudinal direction of a heat transfer pipe with a heat transfer pipe installed therein. The present invention relates to an air conditioner that cools or heats the air around an element by arranging it in parallel with an element placement section of an indoor unit in a state where it is exposed to a target area, and cooling or heating the element by passing a heat medium through a heat transfer tube.

  Conventionally, as this type of air conditioner, there is one in which both the front surface portion and the rear surface portion of the element arrangement portion where the elements are arranged in parallel are opened indoors (an example of an air-conditioning target area) (the following patent document) 1).

  However, in this conventional apparatus, when the indoor unit is installed near the wall, the chamber wall located on the rear side (rear side) of the indoor unit is cooled or heated along with the cooling or heating of the element, so that the surface of the chamber wall is There was a serious problem of condensation or wall burning (e.g. color on the wall).

  Therefore, the present inventors closed the rear surface portion (back surface portion) of the element arrangement portion with the rear surface plate portion, thereby blocking cool air or warm air by the rear surface plate portion, and causing condensation or wall burning on the surface of the chamber wall (for example, An air conditioner that can prevent the occurrence of coloration on the wall) was previously proposed (Japanese Patent Application No. 2011-229954).

Utility Model Registration No. 3170417

  However, in the above proposed apparatus, it is possible to suppress dew condensation or wall burning on the surface of the room wall by closing the rear surface part of the element arrangement part, but the convection in the room is weakened and the room heating efficiency or cooling is reduced. There is a problem that efficiency is lowered, and there is still room for improvement in this respect.

  The present invention has been made in view of the above-described actual situation, and its main problem is to prevent the occurrence of condensation or wall burning on the surface of the indoor wall on the rear side of the indoor unit, while cooling indoor air. Alternatively, the present invention is to provide an air conditioner that can promote the convection of warm air and efficiently increase the cooling efficiency or heating efficiency of the room.

The first characteristic configuration of the present invention is the heat transfer tube arranged in parallel with the element arrangement portion of the indoor unit in a state where the heat absorption or heat dissipation element along the longitudinal direction of the heat transfer tube in which the heat transfer tube is installed is exposed to the air conditioning target area. An air conditioner for cooling or heating the element by passing a heating medium through
While opening the front part of the element arrangement part with respect to the air conditioning target area, and configuring the rear surface part of the element arrangement part with a rear plate part,
An air inflow portion for allowing air to flow into the element arrangement portion by an attraction action by a draft flow generated in the element arrangement portion as the element is cooled or heated is provided in an intermediate portion in the vertical direction of the rear plate portion. It is in.

  According to the above-described configuration, first, the element placement section indicates that condensation or wall burning occurs on the surface of the rear wall of the indoor unit due to cooling or heating of the rear wall of the indoor unit as the element is cooled or heated. It can be suppressed by blocking off cool air or warm air by the rear plate portion constituting the rear surface portion.

  Nevertheless, since air is caused to flow from the air inflow portion of the rear plate portion to the element placement portion by the attracting action caused by the draft flow generated in the element placement portion as the element is cooled or heated, the air inflow causes the air from the element placement portion. Cold air outflow or warm air outflow can be promoted, whereby convection in the air-conditioning target area can be promoted.

  In addition, since an air inflow portion is provided at the middle in the vertical direction of the element arrangement portion where the flow of the generated draft flow is stable, air is efficiently attracted and introduced from the air inflow portion to the element arrangement portion by the draft flow with a stable flow. This can further promote the outflow of cold air or warm air from the element arrangement portion.

  Therefore, while suppressing the occurrence of condensation or wall burning on the room wall surface on the rear side of the indoor unit, the indoor air cooling efficiency or the air heating efficiency can be improved by efficiently promoting indoor air cooling or warm air convection. Can do.

  The shape of the rear plate part is a flat plate shape, a U-shape in plan view with the middle in the left-right direction rearward, and an arc shape in plan view located at the rear toward the center in the left-right direction. Various possible shapes can be employed.

  In addition, the specific portion (region) of the rear plate portion where the air inflow portion is provided is not limited to the portion located immediately after the element placement portion as long as it is an intermediate portion in the vertical direction. The part etc. which deviated to the direction outer side may be sufficient.

  The second characteristic configuration of the present invention is that the air inlet of the air inflow portion is opened toward the downstream side in the flow direction of the draft flow.

  That is, according to this configuration, air can be attracted and introduced from the air inflow portion in the same or substantially the same direction as the flow direction of the generated draft flow in the element arrangement portion. As compared with the case of attracting inflow, air can be smoothly flowed from the air inflow portion to the element arrangement portion with less attraction resistance.

  Therefore, the air attraction at the air inflow portion can be more efficiently performed, and the cool air outflow or the warm air outflow from the element arrangement portion can be further promoted.

  According to a third characteristic configuration of the present invention, an air outflow portion that causes the inflow air from the air inflow portion to flow out of the element arrangement portion is located downstream of the air inflow portion in the rear plate portion in the flow direction of the draft flow. It is in the point provided.

  In other words, according to this configuration, after the inflow air from the air inflow portion on the rear side of the element arrangement portion is moved along the draft flow to the downstream side in the flow direction of the draft flow, the air outflow on the rear side of the element arrangement portion is performed. Will be drained from the department.

  Therefore, the induced flow can flow smoothly while the induced flow and the element and the draft flow are heat-exchanged on the rear side of the element arrangement portion, and the heat exchange in the element arrangement portion can be further promoted accordingly. .

  According to a fourth characteristic configuration of the present invention, in order to constitute the rear plate portion, an upper plate constituting the upper rear surface of the element arrangement portion and a lower plate constituting the lower rear surface of the element arrangement portion are both plates. It is in the point arrange | positioned in the state which forms the clearance gap as said air inflow part between parts.

  That is, since the rear upper side and the rear lower side of the element arrangement portion are divided into an air inflow side and an air outflow side with respect to the room, it is possible that the performance suitable for each is different. Since the upper side and the lower side of the rear plate part are formed as separate members, the upper and lower sides of the element arrangement part are formed by forming the upper and lower sides of the rear plate part with materials suitable for each. Can be made suitable for each.

  Moreover, since the air inflow portion is formed in the element arrangement portion by the relative arrangement of the upper plate and the lower plate constituting the rear plate portion, for example, compared to cutting out an opening as an air inflow portion on one rear plate. Effective utilization of plate materials.

  A fifth characteristic configuration of the present invention is a state in which one of the upper plate and the lower plate that is downstream in the draft flow direction is positioned on the rear side, and the lower portion and the lower plate of the upper plate The upper plate and the lower plate are disposed in a state where the upper plate and the upper plate overlap with each other with the gap therebetween.

  That is, according to this configuration, the overlapping portion (with a gap between the rear plate (downstream of the draft flow) of the upper plate and the lower plate and the front plate of the upper plate and the lower plate ( In other words, it is possible to form an air inflow path along the vertical direction that includes an air inflow opening that opens toward the downstream side of the draft flow in the overlap portion and that includes front and rear wall portions. Therefore, the induced flow that flows into the element arrangement portion by the rectifying action by the air inflow path can be rectified in the same or substantially the same direction as the flow direction of the generated draft flow in the element arrangement portion.

  Therefore, air can smoothly flow into the element arrangement portion from the air inflow portion in a state where the flow is rectified in the same or substantially the same direction as the flow direction of the generated draft flow in the element arrangement portion.

The sixth characteristic configuration of the present invention is a multilayer structure in which the front plate of the upper plate and the lower plate is formed of a heat conducting material on the front side and a heat insulating material on the rear side.
The rear plate of the upper plate and the lower plate lies in that it is entirely formed of a heat conducting material.

  According to the above configuration, first, diffusive cooling and heat conduction in the plate surface direction by the front side thermal conducting material of the upper side plate and the lower side plate constituting the rear side plate part, and cold thermal insulation by the rear side heat insulating material of the lower side plate and Thus, it is possible to further suppress the occurrence of dew condensation or wall burning on the room wall surface on the rear side of the indoor unit.

  Further, the front side heat conducting material is uniformly heated in the surface direction by diffusive thermal conduction or cold conduction in the direction of the plate surface by the front side thermal conducting material of the rear plate portion composed of the upper plate and the lower plate, or By lowering the temperature, air heating or air cooling around the element can be accompanied by accompanying air heating or air cooling in a uniform state in the surface direction even on the front surface side of the front-side heat conducting material. Thereby, while warm outflow or cold outflow from an element arrangement | positioning part can be accelerated | stimulated further, the uniformity in the element arrangement | positioning part right-and-left width direction of the warm outflow or cold air outflow can also be improved.

  In addition, when performing an operation (the other of the heating operation and the cooling operation) opposite to the operation of attracting and flowing air from the air inflow portion (one of the heating operation and the cooling operation), the direction of the air inlet of the air inflow portion is reversed. Since it faces the upstream side of the operation draft flow (hereinafter also referred to as reverse draft flow), the reverse draft flow may flow out to the rear side of the rear plate portion through the air inlet and the air inflow path. However, according to the above configuration, the area of heat exchange with the outflow draft flow and the amount of the heat good conducting material are increased by extending the back plate formed of the heat good conducting material in the vertical direction for air inflow passage formation. Since the volume is increased, the reverse operation draft flow can be discharged in a state where the heat or heat is further removed.

  In addition, since the downstream side plate of the reverse draft flow in this reverse operation is provided with a heat insulating material, the downstream side of the reverse draft flow in which heat exchange with the element has progressed due to the cooling or heat blocking by the heat insulating material It is possible to prevent the room wall surface on the rear side of the indoor unit from being cooled or heated by the cold and warm heat.

  Therefore, even when an operation (the heating operation or the cooling operation) opposite to the operation (at one of the heating operation or the cooling operation) in which air is attracted and introduced from the air inflow portion is performed, condensation is formed on the surface of the room wall on the rear side of the indoor unit. Or it can suppress that a wall burn occurs.

  The seventh characteristic configuration of the present invention is the lateral side edge region of the front-rear width corresponding to the deviation width in the front-rear direction of the upper side plate and the lower side plate in the rear side plate of the upper side plate and the lower side plate. An auxiliary air inflow portion is provided to allow air to flow into the element arrangement portion by an attracting action caused by a draft flow generated in the element arrangement portion.

  According to the above configuration, attraction by the draft flow generated in the element arrangement portion using the deviation width in the front-rear direction of the upper plate and the lower plate in the rear plate of the upper plate and the lower plate. An auxiliary air inflow portion that allows air to flow into the element arrangement portion due to the action can be provided.

  Therefore, compared with the case where the deviation width in the front-rear direction between the upper plate and the lower plate is widened to widen the opening area of the air inlet, the opening area for air inflow is prevented while preventing an increase in the front-back width of the indoor unit. Can be widened.

  The eighth characteristic configuration of the present invention is that inflow direction changing means for changing the inflow direction of air from the air inflow portion to the element arrangement portion is provided.

  According to the above configuration, the change in the inflow direction by the inflow direction changing means changes the inflow direction of the air from the air inflow portion to the element placement portion according to the operation status of the indoor unit (heating operation, cooling operation, operation output) and the indoor status. It can be optimized according to the situation.

  A ninth characteristic configuration of the present invention is that an inlet opening / closing means for opening / closing an air inlet of the air inflow portion is provided.

  According to the above configuration, the usage mode in which air is attracted and flowed from the air inflow portion to the element arrangement portion by opening and closing the air inlet port by the inflow port opening and closing means, and the usage mode in which air is not attracted and flowed from the air inflow portion to the element arrangement portion. Can be optimized according to the operating conditions of the indoor unit (heating operation, cooling operation, operation output), indoor conditions, and the like.

  A tenth characteristic configuration of the present invention is that an opening area adjusting means for adjusting an opening area of an air inlet of the air inflow portion is provided.

  According to the above configuration, by adjusting the opening area of the air inlet by the opening area adjusting means, the amount of air that is attracted and introduced from the air inflow portion to the element placement portion is determined as the operating status of the indoor unit (heating operation, cooling operation, operation output). It can be optimized according to the indoor conditions.

Front side perspective view of indoor unit in air conditioner Rear side perspective view of indoor unit in air conditioner Exploded perspective view of indoor unit The exploded perspective view of the principal part of an indoor unit Exploded perspective view around the juxtaposed group of heat absorbing / dissipating elements Vertical section of indoor unit Cross section of upper side of indoor unit Cross-sectional view of the indoor unit (A) Schematic cross-sectional view of the indoor unit showing the air flow during cooling operation, (b) Schematic cross-sectional view of the indoor unit showing the air flow during heating operation (A) A schematic longitudinal sectional view of an indoor unit of another embodiment showing the air flow during cooling operation, (b) A schematic side sectional view of the indoor unit of another embodiment showing the air flow during heating operation. (A) A schematic longitudinal sectional view of an indoor unit of another embodiment showing the air flow during cooling operation, (b) A schematic side sectional view of the indoor unit of another embodiment showing the air flow during heating operation.

  1 and 2 show an indoor unit 1 in a natural convection type air conditioner, and this indoor unit 1 includes an element accommodating portion (an example of an element arranging portion) 2 opened toward the front of the fuselage, and this element accommodating portion. Reference numeral 2 denotes a rectangular space region surrounded by an upper case portion 1A, a lower case portion 1B, and a pair of left and right side column case portions 1C extending over the upper and lower case portions 1A and 1B.

  As shown in FIGS. 1 and 7, the element accommodating portion 2 includes a plurality of vertical absorption elements (in this example, seven elements) that absorb and dissipate heat (for heat absorption or for heat dissipation) over the upper case part 1 </ b> A and the lower case part 1 </ b> B. Are arranged in a parallel posture at equal intervals in the left-right width direction of the indoor unit 1.

  As shown in FIGS. 5, 7, and 8, the straight pipe portion 4 a of the heat transfer tube 4 extends through the entire length of the heat absorbing / dissipating element 3 (an example of the interior). I'm allowed. The heat absorbing / dissipating element 3 and the heat transfer tube 4 are both made of a heat conducting material. In this example, the heat absorbing / dissipating element 3 is made of aluminum, and the heat transfer tube 4 is a copper tube.

  As shown in FIG. 5, the heat transfer tube 4 is connected to the pair of adjacent upper protrusions in the straight pipe portion 4 a that penetrates each heat absorbing / dissipating element 3 by a pair of upper bend pipes 4 b and the lower protrusions. Are connected to each other alternately by the lower bend pipes 4c so that the straight pipe portions 4a are connected in series by the upper and lower bend pipes 4b and 4c.

  One end of the meandering heat transfer tube 4 is connected to an outdoor unit (not shown) installed outside through a liquid side refrigerant tube 5a covered with a heat insulating material, and the other end of the meandering heat transfer tube 4 is also a gas covered with a heat insulating material. It connects to the outdoor unit through the side crossing refrigerant pipe 5b.

  The outdoor unit installed outdoors includes a compressor, an outdoor heat exchanger, an expansion valve, and a four-way valve. In the cooling operation, the outdoor heat exchanger functions as a condenser and the meandering heat transfer tube 4 of the indoor unit 1 is provided. The refrigerant R is circulated between the outdoor unit and the indoor unit 1 through the two transition refrigerant pipes 5a and 5b so as to function as an evaporator.

  In the heating operation, the refrigerant path is switched by a four-way valve, so that the outdoor heat exchanger functions as an evaporator, and the meandering heat transfer tube 4 of the indoor unit 1 functions as a condenser. The refrigerant R is circulated between the outdoor unit and the indoor unit 1 through the transition refrigerant pipes 5a and 5b.

  In other words, in the cooling operation, the heat transfer tube 4 and the heat absorbing / dissipating element 3 attached thereto are cooled by taking the heat of vaporization accompanying the evaporation of the refrigerant R inside the meandering heat transfer tube 4 functioning as an evaporator, thereby The indoor air around 3 is cooled, and the cooled air is naturally lowered due to the difference in specific gravity due to the temperature difference. In other words, a downward draft flow DR ′ (see FIG. 9B) is generated around the heat absorbing / dissipating element 3. As a result, the cool air is caused to flow obliquely forward and downward from the lower part of the element accommodating portion 2 to the indoor unit installation room (an example of the air-conditioning target area), and a large convection of the indoor air is generated in the indoor unit installation room as the cold air flows out. The room is cooled in such a way that

  Further, in the heating operation, the heat absorbing / radiating element is heated by heating the heat transfer tube 4 and the heat absorbing / dissipating element 3 attached thereto by releasing the condensation heat accompanying the condensation of the refrigerant R inside the meandering heat transfer tube 4 functioning as a condenser. 3 radiates heat from the surface of 3 and heats indoor air around the heat absorbing / dissipating element 3 to naturally raise the heated air due to a difference in specific gravity due to a temperature difference. In other words, an upward draft flow DR around the heat absorbing / dissipating element 3 (See FIG. 9A), thereby causing warm air to flow out from the upper part of the element housing portion 2 to the indoor unit installation room in a diagonally upward direction, and a large convection of the room air (cooling operation) accompanying the warm air outflow The room is heated in cooperation with the heat radiation in such a manner that convection in the opposite direction to the time) is generated in the indoor unit installation room.

  In this example, as shown in FIG. 5, a liquid-side transition refrigerant tube 5 a is connected to one end of a meandering heat transfer tube 4 located at the lower part of the left and right sides of the element housing portion 2, A transition refrigerant pipe 5b on the gas side is connected to the other end of the meandering heat transfer pipe 4 located in the upper part on the other side.

  As shown in FIG. 7, a plurality of fin portions 3 a, 3 b (in the longitudinal direction of the heat absorbing / dissipating element 3 (that is, the longitudinal direction of the heat absorbing / dissipating element 3)) are provided on the front surface side and the rear surface side of the heat absorbing / dissipating element 3. In other words, a pleated portion is integrally formed.

  Specifically, as shown in the enlarged view portion in FIG. 7, the heat absorbing / dissipating element 3 includes a columnar core portion 3c and a substrate portion 3d extending from the core portion 3c toward the left and right outwards in a cross-sectional view. A base 3A extending in the left-right direction is provided, and a plurality of front-side fin portions 3a are extended forward from the core portion 3c and the substrate portion 3d in a parallel posture and arranged at equal intervals on the left and right.

  Similarly, the same number of rear fin portions 3b as the front fin portions 3a are arranged at equal intervals on the left and right sides in a parallel posture so as to correspond to the front fin portions 3a from the core portion 3c and the substrate portion 3d. It extends backward.

  The core portion 3c is formed with a tube insertion hole 3e through which the heat transfer tube 4 passes, and the front side central fin portion 3a 'extending from the core portion 3c of the front side fin portion 3a, and the rear side fin The heat absorbing / dissipating element 3 is fixed to the element support frames 23 and 27, which will be described later, with stoppers such as fixing screws and fixing pins on the central fin portion 3b 'on the rear surface side that extends from the core portion 3c. A stopper insertion hole 3f is formed.

  That is, by providing the fin portion 3a, 3b in the vertical posture in the heat absorbing / dissipating element 3, it is not limited to ensuring a large heat transfer area and heat radiation area for the ambient air of the heat absorbing / dissipating element 3, and cooling operation Then, the cooling air around the heat absorbing / dissipating element 3 is naturally lowered smoothly through the vertical groove portion between the fin portions 3a, 3b, and accordingly, uncooled room air is smoothly attracted around the heat absorbing / dissipating element 3. In addition, the condensed water generated on the surface of the heat absorbing / dissipating element 3 is transmitted to the surface of the heat absorbing / dissipating element 3 and smoothly flows down naturally. The heat exchange (in other words, heat transfer) is kept in an efficient state, the cold air flows out from the lower part of the element housing portion 2 into the room, and the accompanying air convection in the room Effective and causes stably occur.

  Similarly, in the heating operation, the heated air around the heat absorbing / dissipating element 3 is smoothly and naturally raised with a so-called chimney effect through the longitudinal groove between the fins 3a, 3b, and accordingly, the air absorbing / dissipating element 3 The unheated room air is smoothly attracted to the surroundings, thereby maintaining the heat exchange (heat transfer) between the surface of the heat absorbing / dissipating element 3 and the surrounding room air in an efficient state. Warm air outflow from the upper part of the housing part 2 into the room and accompanying air convection in the room are effectively and stably generated.

  As shown in FIGS. 2, 3, and 6 to 8, an upper plate 8 that covers the upper half side of the element accommodating portion 2 and a lower half side of the element accommodating portion 2 are provided on the rear surface portion of the element accommodating portion 2. A rear plate portion 6 including a lower plate 9 to be covered is provided.

  The upper plate 8 is entirely formed of a thermally conductive plate material 8a (an example of a thermally conductive material, in this example, an aluminum plate) having a glossy surface (an example of a reflective surface) on the front surface, The lower plate 9 has a front surface formed of a thermally conductive plate material 9a (an example of a thermally conductive material, which is an aluminum plate in this example) having a glossy surface on the front surface, and a heat insulating material 9b (an expanded polystyrene in this example). The three-layer structure (an example of a multi-layer structure) is formed by forming the rear surface side by the upper portion of the metal back panel 9d which is the exterior material on the rear side of the indoor unit.

  As shown in FIGS. 4, 7, and 8, side plate 10, which will be described later, is provided on the left and right side portions of the element housing portion 2 with a side plate 10 made of a thermally conductive plate having a glossy surface on the front side. 11 is provided in a state where a heat insulating material 12 is interposed between the side pillar frame 11 and the heat transfer to the side pillar frame 11.

  That is, in the heating operation, the rear wall 6 blocks the warm air from the fact that the wall K on the rear side of the indoor unit is heated with the heating of the heat absorbing / dissipating element 3 and the surface of the rear side wall K is burnt. And heat-conductive plate materials 8a and 9a on the front surface side of the rear plate portion 6 and diffusive thermal conduction in the plate direction by the heat-conductive side plate 10 and the rear surface side of the rear plate portion 6 In the cooling operation, the room wall K on the rear side of the indoor unit is cooled, and condensation occurs on the surface of the rear side wall K in the cooling operation. The cool air is blocked by the rear plate portion 6 and the heat-conductive plate materials 8a and 9a on the front side of the rear plate portion 6 and the diffusive cooling in the plate surface direction by the heat-conductive side plate 10 are performed. It is suppressed by conduction and cold heat insulation by the heat insulating material 9b on the rear surface side of the rear plate portion 6.

  In the heating operation, the heat-conductive plates 8a and 9a on the front side of the rear plate 6 and the heat-conductive left and right side plates 10 are diffused in the plate direction due to the heat-conductive properties. The inner surface side plate materials 8a, 9a, and 10 of the element housing portion 2 are uniformly heated in the direction of the plate surface by heat conduction, and the front surfaces of the plate materials 8a, 9a, and 10 are accompanied by air heating around the heat absorbing / dissipating element 3. Also on the side, incidental air heating is generated in a uniform state in the surface direction, so that the air heating in the element housing portion 2 is made more uniform in the lateral width direction of the element housing portion 2 and further efficient. Thus, the warm air outflow from the upper part of the element housing portion 2 is further promoted, and the uniformity of the warm air outflow in the left-right width direction of the element housing portion 2 is also enhanced.

  Further, in the heating operation, the heat radiation from the surface of the heat absorbing / dissipating element 3 that is directed rearward and laterally is reflected by the glossy surface on the front surface of the inner surface side plate members 8a, 9a, and 10 of the element housing portion 2, thereby Further, the heat radiation from the element housing portion 2 into the room is further promoted, and the uniformity of the heat radiation is enhanced.

  On the other hand, in the cooling operation, the thermally conductive plates 8a and 9a on the front side of the rear plate portion 6 and the right and left side plate portions 10 having thermal conductivity are diffused in the plate surface direction due to the thermal conductivity. The inner surface side plate members 8a, 9a, and 10 of the element housing portion 2 are uniformly cooled in the direction of the plate surface by the cold heat conduction, and with the air cooling around the heat absorbing / dissipating element 3, the plate members 8a, 9a, 10 Also on the front side, incidental air cooling occurs in a uniform state in the surface direction, thereby making the air cooling in the element housing portion 2 more uniform in the left-right width direction of the element housing portion 2 and further efficient. Thus, the outflow of cold air from the lower part of the element housing portion 2 is further promoted, and the uniformity of the cold air outflow in the left-right width direction of the element housing portion 2 is also improved.

  Further, in the cooling operation, the plate materials 8a, 9a on the inner surface side of the element housing portion 2 are formed by diffusive cooling heat conduction in the plate surface direction due to the thermal conductivity of the inner surface side plate materials 8a, 9a, 10 of the element housing portion 2. The element housing portion 2 is prevented from being concentrated in the portion adjacent to the heat absorbing / dissipating element 3 of 10 and this causes a part of the inner surface side of the element housing portion 2 to become particularly cold due to the concentration of the cold heat. Condensed water is also prevented from being generated on the inner surface of the.

  As shown in FIGS. 2, 6, and 9, at the intermediate portion in the vertical direction of the rear plate portion 6, an attraction by an upward draft flow DA generated in the element housing portion 2 as the heat absorbing / dissipating element 3 is heated. An air inflow portion 7 is provided to allow the air IA to flow into the element accommodating portion 2 by the action.

  The air inflow portion 7 is a state in which the upper plate 8 which is the downstream side in the flow direction of the draft flow DA during heating is located on the rear side of the upper plate 8 and the lower plate 9 and the lower side of the upper plate 8 By arranging the upper plate 8 and the lower plate 9 in a state where the portion 8b and the upper portion 9c of the lower plate 9 overlap each other with a gap in the front-rear direction, the lower portion 8b and the lower plate of the upper plate 8 are disposed. 9 is composed of a gap between the upper portion 9c and the upper portion 9c.

  That is, as shown in FIG. 6, the air inflow portion 7 includes an air inflow port 7 a that opens upward on the downstream side of the draft flow DA, a lower portion 8 b of the upper plate 8, and an upper portion 9 c of the lower plate 9. And an air inflow passage 7b extending in the up-and-down direction and separated in the front-rear direction.

  As shown in FIG. 7, on the left and right side portions of the upper plate 8, leg portions 8c formed to be bent in an L shape in a plan view are formed to protrude forward, and on the tip side of the leg portions 8c. By fixing the mounting piece 8d to the side pillar frame 11 with a fixing tool such as a fixing screw (not shown), the upper plate 8 is positioned on the rear side of the lower plate 9 so that the upper half of the rear surface of the element housing portion 2 is located. It is attached to the side.

  As shown in the enlarged view portion in FIG. 7, heat conduction between the upper plate 8 and the side column frame is between the mounting piece 8 d of the leg portion 8 c and the side column frame 11 (and the side plate unit 10). Insulating material 15 is interposed so as to suppress the above.

  As shown in FIGS. 2 and 6, the air inflow portion 7 is located on the upper end side of the rear plate portion 6 (an example of the downstream side in the flow direction of the draft flow DA from the air inflow portion 7 in the rear plate portion 6). Is provided with an air outflow portion 13 through which the inflowing air IA from the element storage portion 2 flows out. The air outflow portion 13 is formed from an open portion in which an upper edge front region of the upper plate 8 is formed with a front-rear width corresponding to a deviation width between the upper plate 8 and the lower plate 9.

  Further, on both the left and right sides of the upper half side of the rear plate portion 6, auxiliary air inflow portions 14 are provided for allowing the air IA to flow into the element accommodating portion 2 by the attraction action by the draft flow DA generated in the element accommodating portion 2. . The auxiliary air inflow portion 14 is a front side width front region (an example of a side side edge region) corresponding to a deviation width in the front / rear direction between the upper plate 8 and the lower plate 9 of the upper plate 8 located on the rear side. Specifically, it is composed of a pair of vertically long openings formed in the base piece portion 8e of the leg portion 8c located in the left and right side edge front region of the upper plate 8.

  As shown in FIG. 8, the lower plate 9 has a heat conductive material 9a, a heat insulating material 9b, and a back surface in a state where the heat insulating material 9b is inserted into a concave surface portion 9e formed on the back side of the heat conductive material 9a on the front side. By laminating the panel 9d, the right and left side edges of the thermal conductive plate material 9a and the back panel 9d are fixed to the side column frame 11 with a fixing tool such as a fixing screw (not shown). It is attached to the lower half.

  In addition, as shown to the enlarged view part in FIG. 8, between the right-and-left both-sides edge of the heat-conductive board | plate material 9a and the side column frame 11 (and side plate part 10), the lower side board 8 and a side column frame are between. A heat insulating material 37 is interposed so as to suppress heat conduction therebetween.

  That is, as shown in FIG. 9A, in the heating operation, the upward draft flow DA generated in the element accommodating portion 2 as the heat absorbing / dissipating element 3 is heated, and the draft flow in the middle portion in the vertical direction where the flow is stable. With DA, the air inflow path 7b along the vertical direction and the air inlet 7a of the upward opening are in the same or substantially the same direction as the draft flow direction from the air inflow portion 7 of the rear plate portion 6 to the element housing portion 2. The air IA is efficiently attracted and flown in the state of being rectified upward, and further, the air IA is also attracted and flown from the auxiliary air flow-in portion 14, and from the upper portion of the element housing portion 2 due to the flow of the induced air IA. This further promotes the outflow of warm air into the room and further promotes convection in the room.

  In the heating operation, the inflowing air IA from the air inflow part 7 and the auxiliary air inflow part 14 is smoothly exchanged with the heat absorbing / dissipating element 3 and the draft flow DA from the air outflow part 13 on the upper end side of the element housing part 2. The heat exchange in the element accommodating portion 2 is promoted by flowing out.

  On the other hand, as shown in FIG. 9B, in the cooling operation, since the direction of the air inlet 7a of the air inflow portion 7 faces the upstream side of the downward draft flow DA ′ during the cooling operation, this downward draft flow DA ′. Flows out to the rear side through the air inlet 7a and the air inflow path 7b. However, the upper plate 8 made of a heat conducting material is extended downward to form the air inflow path. The area and the volume of the heat conducting material are increased, and the draft plate DA ′ is discharged to the outside in a state where the cooling heat is further deprived by the increased amount, and the lower plate 9 located on the downstream side of the downward draft flow DA ′. The heat insulating material 9b provided in the heat exchanger blocks the cooling heat downstream of the draft flow DA 'in which heat exchange with the heat absorbing / dissipating element 3 has proceeded, so that the surface of the room wall K on the rear side of the indoor unit is cooled during cooling operation. Cooling causes condensation on the surface of the chamber wall K Arresting you.

  As shown in the partially enlarged view of FIG. 7, the front side fin portion 3a of the heat absorbing / dissipating element 3 has a longer forward extension length as it is located at the center in the left-right direction, in other words, left-right direction. The tip located in the center side is configured to have an extension length in which the tip is positioned forward, and a virtual envelope in plan view connecting the tips of the front-side fin portions 3a protrudes forward. A curve on a semicircular arc is formed, and thereby, the outflow cold air during the cooling operation, and the outflow warm air and heat radiation during the heating operation are spread in the width direction of the indoor unit.

  On the other hand, the rear fin portions 3b of the heat absorbing / dissipating element 3 have rearward extension lengths identical to each other (an example of the same or substantially the same), in other words, the tips of the fin portions are in the front-rear direction. It is configured to have an extended length that is the same position (an example of the same position or substantially the same position), and the virtual envelope in plan view that connects the tips of the rear surface side fin portions 3b is a straight line. Thus, in combination with the thermal conductivity of the inner surface side plates 8a, 9a, and 10 of the element housing portion 2, the temperature reduction or the temperature increase on the inner surface side of the element housing portion 2 accompanying the cooling or heating of the heat absorbing / dissipating element 3 is achieved. Make it more uniform in the surface direction.

  As shown in FIGS. 3, 4, and 7, the outer sides of the left and right side column case portions 1 </ b> C extend in the vertical direction, and the upper end portion and the lower end portion are side panels of the upper case portion 1 </ b> A and the lower case portion 1 </ b> B, respectively. The side column panel 17 and the left and right side plates 10 serving as the inner side surfaces of the element accommodating portion 2 are formed. Inside these side column case portions 1C, a side column frame 11 extending in the vertical direction and a vertical column extending. A molded heat insulating material 18 is disposed.

  As shown in FIGS. 3 and 6, the outer case 1 </ b> A includes a front panel 19, a rear lower panel 20 connected to the rear of the upper panel 19, an upper panel 21 made of a net, and left and right side columns. The upper end portion of the panel 17 is formed, and the upper end portion of the heat-absorbing / dissipating element 3 is formed on the portion extending between the front panel 19 and the rear lower panel 20 (that is, the portion forming the ceiling surface of the element housing portion 2). A plurality of upper notches to be inserted are formed side by side.

  Further, the lower portion 19a of the front panel 19 in the upper case portion 1A (an example of the air guide surface on the front side of the heat-absorbing / dissipating element 3) is inclined so that the lower side is retracted backward, and the inclined lower portion 19a As a result, the warm air outflow from the upper part of the element housing part 2 during the heating operation is smoothed, and the indoor air inflow into the upper part of the element housing part 2 during the cooling operation is made smooth.

  Furthermore, the lower surface of the rear lower panel 20 in the upper case portion 1A (an example of the air guide surface on the rear side of the heat-absorbing / dissipating element 3) is also inclined so that the lower side is retracted backward, and the element housing portion during heating operation 2 smoothes outflow of warm air from the upper portion of the air-conditioner 2 and facilitates the inflow of indoor air into the upper portion of the element housing portion 2 during the cooling operation.

  Inside the upper case portion 1A, an upper frame 22 and a pair of front and rear element upper support frames 23 below the upper frame 22 are arranged. The front panel 19, the upper frame 22, and the front and rear element upper support frames 23 are respectively provided. Their both ends are connected to the left and right side column frames 11.

  As shown in FIGS. 3 and 6, the outer case of the lower case portion 1 </ b> B includes a front panel 24, a rear upper panel 25 connected to the rear thereof, a lower end portion of the rear panel 9 d of the rear plate portion 6, The lower end portion of the side column panel 17 is formed, and the lower end portion of the heat absorbing / dissipating element 3 is inserted into the rear extension portion of the front panel 24 (that is, the portion forming the bottom surface of the element housing portion 2). A plurality of lower notches are formed side by side.

  Further, the upper portion 24a of the front panel 24 in the lower case portion 1B (an example of the air guide surface on the front side of the heat-absorbing / dissipating element 3) has an inclined posture that retreats backward toward the upper side. While flowing out cold air from the lower part of the element accommodating part 2 at the time of driving | operation, the inflow inflow of the indoor air to the lower part of the element accommodating part 2 at the time of heating operation is made smooth.

  Furthermore, the upper surface of the rear upper panel 25 in the lower case portion 1B (an example of the air guide surface on the rear side of the heat-absorbing / dissipating element 3) is also inclined so as to retreat backward toward the upper side, and the element accommodating portion 2 during cooling operation This facilitates smooth outflow of cold air from the lower part of the air and facilitates the inflow of indoor air into the lower part of the element housing part 2 during the heating operation.

  Inside the lower case portion 1B, a pair of front and rear lower frames 26 and a pair of front and rear element lower support frames 27 above are arranged. The front panel 24, the rear upper panel 25, the front and rear lower frames 26, The front and rear element lower support frames 27 are connected to the left and right side column frames 11 at both ends thereof.

  A drain pan 28 for receiving condensed water flowing down from the heat absorbing / dissipating element 3 during cooling operation is arranged between the front and rear lower frames 26 and the front and rear element lower support frames 27 located above the lower case portion 1B. Along with this, a drain pump 30 for discharging the condensed water received in the drain pan 28 to the outside through the drain pipe 29 is provided in the lower case portion 1B.

  Also, between the front and rear element lower support frames 27 and the heat absorbing / dissipating element 3, the condensed water received from the heat absorbing / dissipating element 3 flows and guides to the lower drain pan 28 through the gap between the element lower support frames 27. A bowl-shaped resin drain receiver 31 is interposed.

  Further, inside the lower case portion 1B, a gap is formed around the element lower support frame 27 and the drain pan 28, and at the same time, the outer shape matches the inner surface of the front panel 24 and the inner surface of the rear panel 9d. The molded heat insulating material 32 having a two-part structure is filled.

  Reference numeral 33 denotes an indoor unit installation base attached to the lower surface portion of the lower case portion 1B, and reference numeral 34 denotes a fall-preventing metal fitting for preventing the indoor unit from falling by connecting the wall surface to the rear upper frame 22. It is.

[Another embodiment]
The configuration of the rear plate portion 6 is not limited to the configuration shown in the above-described embodiment, and various configuration changes are possible.

  For example, contrary to the above-described embodiment, the upper plate 8 and the lower plate 9 are positioned in the state where the lower plate 9 that is downstream in the flow direction of the draft flow DA ′ during cooling is positioned on the rear side, and By disposing the upper plate 8 and the lower plate 9 in a state where the lower portion 8b of the side plate 8 and the upper portion 9c of the lower plate 9 overlap with a gap in the front-rear direction, the lower side of the upper plate 8 You may comprise the air inflow part 7 from the clearance gap between the part 8b and the upper part 9c of the lower side board 9. FIG.

  In this way, the air IA is caused to flow into the element accommodating portion 2 from the air inflow portion by the attracting action by the draft flow DA ′ during cooling, and the cold air outflow from the lower portion of the element accommodating portion 2 into the room is promoted. Can do.

  For example, as shown in FIG. 10, a plurality of guide vanes 35 (inflow direction changing means) whose posture can be freely changed by turning around an axis along the left-right width direction at least in the middle in the vertical direction of the rear plate portion 6. And an inflow direction of the air IA into the element accommodating portion 2 may be changed by an operation of changing the posture of the guide wing 35.

  In this way, the direction in which the air IA flows from the air inflow portion 7 to the element accommodating portion 2 is optimal in accordance with the operation status (heating operation, cooling operation, operation output) of the indoor unit 1 and indoor conditions. Can be. For example, as shown in FIG. 10 (a), during the heating operation, the air IA can be smoothly flowed in a state where the attraction resistance is low in the heating operation by changing the orientation of the guide vanes 35 to make the inflow direction of the air IA obliquely upward. It is possible to promote the warm air outflow from the upper part of the element accommodating portion 2 into the room, and at the time of the cooling operation, by changing the posture of the guide blades 35, the inflow direction of the air IA is inclined downward so that the cooling operation is performed. The air IA can be smoothly flowed in with a low attraction resistance, and the cool air outflow from the lower portion of the element housing portion 2 into the room can be promoted.

Further, for example, as shown in FIG. 11, an opening / closing door 36 (an example of an inlet opening / closing means, an opening area adjusting means) that opens and closes the air inflow portion 7 (specifically, the air inlet 7a) is adjustable. An example) may be provided.

  If it does in this way, by the opening and closing of the opening / closing door 36, the usage mode in which the air IA is attracted from the air inflow portion 7 to the element accommodating portion 2, and the usage mode in which the air IA is not attracted from the air inflow portion 7 to the element accommodating portion 2. Can be optimized according to the operating conditions (heating operation, cooling operation, operation output) of the indoor unit 1 and the indoor conditions, and by adjusting the opening of the open / close door 36, the air outflow portion 7 The amount of air that flows into the element accommodating portion 2 can be optimized according to the operation status (heating operation, cooling operation, operation output) of the indoor unit 1 and the indoor status. For example, as shown in FIG. 11A, the opening / closing door 36 is fully opened during heating operation, and air IA is caused to flow from the air inflow portion 7 into the element accommodating portion 2 by the attraction action by the draft flow DA during heating. The use form is such that the warm air outflow from the upper part of the housing part 2 into the room is promoted, while the open / close door 36 is closed or partially opened during the cooling operation to save the cold air outflow from the lower part of the element housing part 2. It can also be taken.

  In the above-described embodiment, the example in which the circulating refrigerant R of the refrigeration circuit is passed through the heat transfer tube 4 as the heat medium to be passed through the heat transfer tube 4 is described. However, the heat medium to be passed through the heat transfer tube 4 is cold water, brine, or ice water slurry. , Hot water, steam and the like.

  In the above-described embodiment, the case where the air inflow portion 7 is configured by a gap formed between the plurality of plates 8 and 9 has been described as an example, but for example, from an opening formed through a single plate or the like It may be configured.

  In the above-described embodiment, the case where the element accommodating portion 2 is configured from the concave portion that opens only to the front of the indoor unit 1 has been described as an example, but the element accommodating portion 2 is configured to the front and side of the indoor unit 1. You may make it open.

  In the above-described embodiment, the case where all of the left and right side surfaces of the element accommodating portion 2 are closed with the left and right side plates 10 is shown as an example. Also good.

  In the above-described embodiment, the air inflow portion 7 is formed with a gap between the lower portion 8 b of the upper plate 8 and the upper portion 9 c of the lower plate 9, and the front-rear direction of the upper plate 8 and the lower plate 9 The air inflow part 7 and the auxiliary air inflow are formed by opening the lateral edge front area (an example of the lateral edge area) of the upper side plate 8 having the front-rear width corresponding to the deflection width at As an example, the case where both the portion 14 and the rear plate portion 6 are provided is shown as an example, but for example, as an air inflow portion that causes the air IA to flow into the element accommodating portion 2 by an attraction by a draft flow generated in the element accommodating portion 2, Any one of the air inflow portion 7 and the auxiliary air inflow portion 14 may be provided on the rear plate portion 6.

  In the above-described embodiment, the case where the front surface of the rear plate portion 6 (the front surfaces of the plate members 8a and 9a) is a glossy surface is described as an example. However, the front surface of the rear plate portion 6 is not necessarily a glossy surface.

  The air conditioner by this invention can be used with respect to the air-conditioning object area | region of various uses in various fields.

DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Element arrangement | positioning part 3 Element 4 Heat-transfer tube 6 Rear surface board part 7 Air inflow part 8 Upper side board 9 Lower side board 8a, 9a Thermally conductive material 9b Heat insulating material 13 Air outflow part 14 Auxiliary air inflow part 35 Inflow direction change means 36 Inlet opening / closing means, opening area adjusting means R Heat medium DA, DA 'Draft flow IA Air

Claims (10)

The element for heat absorption or heat radiation along the longitudinal direction of the heat transfer tube with the heat transfer tube is arranged in parallel with the element arrangement portion of the indoor unit in a state where it is exposed to the air-conditioning target area, and a heat medium is passed through the heat transfer tube to pass the element. An air conditioner for cooling or heating
While opening the front part of the element arrangement part with respect to the air conditioning target area, and configuring the rear surface part of the element arrangement part with a rear plate part,
An air conditioner in which an air inflow portion for allowing air to flow into the element arrangement portion by an attracting action by a draft flow generated in the element arrangement portion as the element is cooled or heated is provided in an intermediate portion in the vertical direction of the rear plate portion. apparatus.   The air conditioner according to claim 1, wherein an air inflow port of the air inflow portion is opened toward a downstream side in a flow direction of the draft flow.   3. The air outflow portion for allowing the inflow air from the air inflow portion to flow out of the element arrangement portion is provided on the downstream side in the draft flow direction with respect to the air inflow portion in the rear plate portion. Air conditioner.   To constitute the rear plate portion, an upper plate constituting the upper rear surface of the element arrangement portion and a lower plate constituting the lower rear surface of the element arrangement portion are used as the air inflow portion between both plate portions. The air conditioner according to any one of claims 1 to 3, wherein the air conditioner is disposed in a state of forming a gap.   Of the upper plate and the lower plate, the downstream side of the draft flow direction is positioned on the rear side, and the lower portion of the upper plate and the upper portion of the lower plate are in the front-rear direction. The air conditioner according to claim 4, wherein the upper plate and the lower plate are disposed in a state of being overlapped with a gap. The front side plate of the upper side plate and the lower side plate has a multilayer structure in which the front side is formed of a heat conducting material and the rear side is formed of a heat insulating material,
6. The air conditioner according to claim 5, wherein a rear plate of the upper plate and the lower plate is entirely formed of a heat conducting material.   Due to the draft flow generated in the element arrangement portion in the lateral edge region of the front-rear width corresponding to the deviation width in the front-rear direction of the upper plate and the lower plate in the rear plate of the upper plate and the lower plate The air conditioner according to claim 5 or 6, further comprising an auxiliary air inflow portion for allowing air to flow into the element arrangement portion by an attractive action.   The air conditioner according to any one of claims 1 to 7, further comprising inflow direction changing means for changing an inflow direction of air from the air inflow portion to the element arrangement portion.   The air conditioner according to any one of claims 1 to 8, further comprising an inlet opening / closing means for opening and closing an air inlet of the air inflow portion.   The air conditioner according to any one of claims 1 to 9, further comprising an opening area adjusting means for adjusting an opening area of an air inlet of the air inflow portion.

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