JP2010196927A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce cost of an air conditioner by reducing use amount of expensive materials. <P>SOLUTION: The air conditioner includes: a casing 20 having a suction port 21 and a blowout port 22; a heater 53 disposed within the casing 20 and heating air flowing from the suction port 21 into the casing 20; holders 54, 55 holding the heater 53 and fitted to the casing 20; and a spacer 59 coming into contact with the heater 53 and disposed between the holders 54, 55 and the heater 53. At least one of the heat resistance and the flame retardance of the spacer 59 is set higher than that of the holders 54, 55. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air conditioner having a heater.

  A conventional air conditioner is disclosed in Patent Document 1. This air conditioner is configured as an integrated type in which an indoor part arranged indoors is arranged at the front part and an outdoor part arranged outside the room is arranged at the rear part. The indoor part and the outdoor part are adjacent to each other through a partition wall. A compressor for operating the refrigeration cycle is arranged inside the outdoor. An outdoor heat exchanger connected to the compressor is disposed on the rear surface of the outdoor side, and an outdoor fan that cools the outdoor heat exchanger against the outdoor heat exchanger is provided.

  A suction port opens on the front surface of the indoor portion, and a blower outlet opens above the suction port. A blower passage is formed in the indoor portion by a blower duct connecting the suction port and the blower outlet, and a blower fan is provided in the blower passage. An indoor heat exchanger connected to the compressor via a refrigerant pipe is disposed between the blower fan and the suction port. A heater unit having a plurality of tubular heaters is disposed between the blower fan and the indoor heat exchanger.

  When the cooling operation is started, the refrigeration cycle is operated by driving the compressor, the indoor heat exchanger becomes an evaporator on the low temperature side of the refrigeration cycle, and the outdoor heat exchanger becomes a condenser on the high temperature side of the refrigeration cycle. The outdoor heat exchanger is cooled by the outdoor fan and dissipates heat. Indoor air flows into the air passage from the suction port by driving the blower fan, and the air that has been cooled down by exchanging heat with the indoor heat exchanger is sent out from the air outlet to the room. Thereby, indoor cooling is performed.

  When the heating operation is started, the refrigeration cycle is operated by driving the compressor, the indoor heat exchanger becomes a condenser on the high temperature side of the refrigeration cycle, and the outdoor heat exchanger becomes an evaporator on the low temperature side of the refrigeration cycle. The outdoor heat exchanger is heated by an outdoor fan. Indoor air flows into the air passage from the suction port by driving the blower fan, and the temperature is raised by exchanging heat with the indoor heat exchanger. Further, the air in the air passage is further heated by driving the heater. The heated air is sent into the room through the outlet and the room is heated.

  In addition, a ventilation damper for introducing outside air into the room is provided at the left part of the partition wall so as to be openable and closable, and an opening is provided at the back of the air duct. When the ventilation damper is opened when the blower fan is driven, outside air flows into the blower passage from the ventilation damper through the opening. Outside air that has flowed in through the opening flows through the air passage and is sent out from the outlet. Thereby, indoor ventilation can be performed.

Japanese Patent Laid-Open No. 6-2886 (pages 2 to 4 and FIG. 2)

  However, according to the conventional air conditioner, the heater unit is integrated by holding a plurality of heaters by a holder of a resin molded product, and is attached by screwing the holder into the indoor casing. At this time, the holder needs heat resistance (for example, 260 ° C. or more) and flame retardancy (for example, UL standard 94 grade 5V) in order to contact the heater. For this reason, since expensive PPS (polyphenylene sulfide) resin or the like is used as the material of the holder, there is a problem that the cost of the air conditioner increases.

  An object of this invention is to provide the air conditioner which can reduce cost.

  In order to achieve the above object, the present invention provides a housing having a suction port and an air outlet, a heater that is disposed in the housing and heats air that has flowed into the housing from the suction port, and the heater. Holding the holder attached to the housing, and a spacer disposed in contact with the heater and between the holder and the heater, wherein at least one of heat resistance and flame retardancy of the spacer It is characterized by being higher than the holder.

  According to this configuration, the indoor air taken into the housing from the suction port is heated by the heater and sent out from the blowout port to the room. Thereby, the room is heated. For example, both ends of the heater are held by a holder via a spacer, and the heater is fixed at a predetermined position by fixing the holder to the housing by screws or the like. The spacer in contact with the heater is made of a material having high heat resistance and flame retardancy that does not deform or ignite even when the heater is abnormally heated to a higher heat generation temperature than in normal use. Since the holder does not directly contact the heater due to the spacer, the heat transmitted to the holder is lower than that of the spacer. For this reason, the holder can use a material having one or both of heat resistance and flame retardancy lower than those of the spacer. At this time, the holder is lower in heat resistance or flame retardancy than the spacer, but is not so deformed or ignited by the heat transmitted when the heater is heated to a higher heat generation temperature than in normal use. Made of flame retardant material. In the heater, a heat exchanging fin portion may be fixed to a heat generating portion that generates heat.

  According to the present invention, in the air conditioner configured as described above, the heater is formed to extend in one direction, the holder holds both ends of the heater in the longitudinal direction, and the bracket is attached to the housing. And the holder may be slidably attached to the bracket.

  With this configuration, the holder that holds both ends of the heater in the longitudinal direction is slidably attached to the housing via the bracket. When the heater is expanded due to the temperature rise, the holder integrated with the heater slides with respect to the bracket.

  According to the present invention, in the air conditioner configured as described above, the heater is formed to extend in one direction, the holder holds both ends of the heater in the longitudinal direction, and the bracket is attached to the housing. And the spacer fixed to the heater may be slidable with respect to the holder.

  With this configuration, the holder that holds both ends of the heater in the longitudinal direction is attached to the housing via the bracket. The heater slides with respect to the holder together with the spacer when it expands due to the temperature rise.

  In the air conditioner configured as described above, the present invention may be configured such that the spacer has a locking claw that is locked to the holder. With this configuration, the heater is attached to the holder in which the spacer is locked by the locking claw.

  In the air conditioner configured as described above, it is preferable that the spacer is made of PPS resin. With this configuration, for example, the heat resistance of the PPS resin is about 260 ° C., and the flame retardancy is a UL standard 94 grade 5V. For this reason, the spacer has high heat resistance and flame retardancy.

  In the air conditioner configured as described above, it is preferable that the holder is made of PPE resin. With this configuration, the PPE resin is less expensive than the PPS resin. For example, a PPE resin having a heat resistance of about 130 ° C. and a flame retardancy of UL standard 94, grade 5V is used. For this reason, the holder has lower heat resistance than the spacer made of PPS resin.

  According to the present invention, in the air conditioner having the above-described configuration, the heater includes a PTC heater, and is provided in the holder and connects the first and second electrodes facing the PTC heater, and the PTC A separation portion disposed between the first and second electrodes extending from the heater and separating the first and second electrodes by a predetermined amount and leading to the terminal portion, and at least one of heat resistance and flame retardancy of the separation portion May be higher than the holder. With this configuration, the first and second electrodes facing each other with the semiconductor element interposed therebetween are extended from the PTC heater, separated by a predetermined distance by the separation part, and the tip is connected to the terminal part of the holder.

  According to the present invention, in the air conditioner configured as described above, it is preferable that the separation portion is made of a PPS resin. With this configuration, the heat resistance of the PPS resin is about 260 ° C., and the flame retardancy is a UL standard 94 grade 5V. For this reason, a separation part has high heat resistance and flame retardance.

  According to the present invention, since at least one of the heat resistance and flame retardance of the spacer disposed between the holder and the heater in contact with the heater is higher than that of the holder, a material having high heat resistance and flame retardancy is used as the spacer. Can be used to reduce the heat resistance or flame retardancy of the holder. Therefore, the amount of expensive materials used can be reduced and the cost of the air conditioner can be reduced.

The perspective view seen from the front which shows the air harmony machine of a 1st embodiment of the present invention. Side surface sectional drawing which shows the air conditioner of 1st Embodiment of this invention. The top view which shows the air conditioner of 1st Embodiment of this invention. The perspective view seen from the back which shows the air harmony machine of a 1st embodiment of the present invention. The front view which shows the heater unit of the air conditioner of 1st Embodiment of this invention. The side view which shows the heater unit of the air conditioner of 1st Embodiment of this invention. The perspective view which shows the right holder of the heater unit of the air conditioner of 1st Embodiment of this invention. The perspective view which shows the left holder of the heater unit of the air conditioner of 1st Embodiment of this invention. H part enlarged view of FIG. AA sectional view of FIG. BB sectional view of FIG. The perspective view which shows the state at the time of attachment or detachment of the heater unit of the air conditioner of 1st Embodiment of this invention. 3 is a cross-sectional view taken along line AA of FIG. 3 showing a state when the heater unit of the air conditioner according to the first embodiment of the present invention is attached or detached. BB sectional drawing of FIG. 3 which shows the state at the time of attachment or detachment of the heater unit of the air conditioner of 1st Embodiment of this invention. The perspective view which abbreviate | omitted the indoor heat exchanger from FIG. The rear perspective view which shows the state which opened the ventilation damper of the air conditioner of 1st Embodiment of this invention. The rear view which shows the indoor part of the air conditioner of 1st Embodiment of this invention The rear view which shows the indoor part which has the other opening part of the ventilation duct of the air conditioner of 1st Embodiment of this invention. The rear view which shows the indoor part which has the other opening part of the ventilation duct of the air conditioner of 1st Embodiment of this invention. The rear view which shows the indoor part of the air conditioner of 2nd Embodiment of this invention. The rear view which shows the indoor part of the air conditioner of 3rd Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. 1, 2, 3, and 4 are a perspective view, a right side cross-sectional view, a top view, and a perspective view as seen from the back, showing the air conditioner of the first embodiment. 1, 3 and 4 show a state in which the exterior cover 30 (see FIG. 2) is removed. The air conditioner 1 is configured as an integrated type having an indoor part 2 arranged indoors and an outdoor part 4 arranged adjacent to the indoor part 2 and outdoor.

  A suction port 21 is provided in front of the indoor portion 2, and an outdoor heat exchanger 42 is provided in front of the outdoor portion 4. In the following description, the inlet 21 side is referred to as the front side, and the outdoor heat exchanger 42 side is referred to as the rear side (back side). Moreover, the right side and the left side when facing the suction port 21 are referred to as the right side and the left side of the air conditioner 1.

  The indoor part 2 and the outdoor part 4 are installed on the bottom plate 3 and separated by a partition wall 5 in the front-rear direction. The indoor portion 2 forms a housing 20 surrounded on the outside by the bottom plate 3, the partition wall 5 and the exterior cover 30. An electrical component 20 a on which electrical components are arranged is provided at the right end in the housing 20. Similarly, the exterior 4 forms a casing 40 surrounded by the bottom plate 3, the partition wall 5, and an exterior cover (not shown).

  A compressor 41 that operates the refrigeration cycle is disposed at the right end of the outdoor unit 4. An outdoor heat exchanger 42 connected to the compressor 41 via the refrigerant pipe 47 is disposed on the back surface of the outdoor exterior 4. The outdoor fan 43 composed of a propeller fan is disposed in the center in the left-right direction so as to face the outdoor heat exchanger 4 and cools the outdoor heat exchanger 4. The outdoor fan 43 and the outdoor heat exchanger 42 are disposed in the housing 44, and the housing 44 forms a duct that guides airflow from the outdoor fan 43 to the outdoor heat exchanger 42. The housing 44 is supported on the partition wall 5 via a bracket 45.

  A ventilation damper 31 is provided at the left end of the partition wall 5 to open and close to introduce outside air into the housing 20 of the indoor portion 2. Condensed water from an indoor heat exchanger 27 to be described later is drained onto the bottom plate 3, and the blades of the outdoor fan 43 are partially immersed in the condensed water accumulated on the bottom plate 3. By the rotation of the outdoor fan 43, the dew condensation water is diffused toward the outdoor heat exchanger 42 so that the outdoor heat exchanger 42 can be further cooled.

  At this time, if the ventilation damper 31 is disposed in the vicinity of the outdoor fan 43, condensed water enters the indoor portion 2 through the ventilation damper 31. For this reason, it is possible to prevent the indoor portion 2 from being flooded by disposing the ventilation damper 31 away from the outdoor fan 43 and being biased to one end in the left-right direction.

  A suction port 21 is opened on the front surface of the exterior cover 30 that covers the indoor portion 2, and an air outlet 22 is opened above the suction port 21. A blower passage 23 is formed in the indoor portion 2 by a blower duct 24 that connects the suction port 21 and the blower port 22. The air duct 24 has a duct member 29 that is detachable when the exterior cover 30 is removed, and a lower wall near the air outlet 22 of the air passage 23 is formed by the duct member 29.

  A blower fan 25 composed of a cross flow fan is provided in the blower passage 23. A louver 26 that varies the air direction is provided in the vicinity of the air outlet 22 in the air passage 23. An indoor heat exchanger 27 connected to the compressor 41 via the refrigerant pipe 47 is disposed between the blower fan 25 and the suction port 21. A heater unit 28 is disposed between the blower fan 25 and the indoor heat exchanger 27. The upper part of the indoor heat exchanger 27 and the heater unit 28 is covered with a duct member 29.

  5 and 6 show a front view and a right side view of the heater unit 28. FIG. The heater unit 28 is integrated by holding right and left ends of a plurality of heaters 53 extending in the left-right direction by holders 54 and 55. The heater 53 is fixed by laminating a heat generating portion 51 that generates heat and a fin portion 52 that exchanges heat with the air flowing through the air passage 23.

  The heat generating part 51 is composed of a PTC (Positive Temperature Coefficient) heater that sandwiches a semiconductor element 51c (see FIG. 9) between first and second electrodes 51a and 51b facing each other. The fin part 52 is formed in a breathable honeycomb shape as shown in the G part. A temperature sensor 63 is provided in contact with the fin portion 52, and the driving of the heater 53 is controlled based on the detection of the temperature sensor 63.

  The temperature sensor 63 is provided in contact with the fin portion 52 above the heat generating portion 51. Thereby, when the blower fan 25 is not driven, heat is easily transmitted to the upper side rather than the lower side, so that the abnormal heating can be detected early by the temperature sensor 63.

  FIG. 7 shows a perspective view of the right holder 54. In the figure, the X direction is the left-right direction, the Y direction is the front-rear direction, and the Z direction is the up-down direction. A plurality of holders 54 are provided corresponding to the heaters 53 provided in the upper and lower sides, and hold the heaters 53 respectively. Each holder 54 is integrated by a bracket 60 (see FIG. 5). The bracket 60 is attached to the inner surface of the air duct 24 as will be described later.

  The holder 54 has a fitting portion 54a to be fitted to the heater 53, and a terminal portion 54b to which the first and second electrodes 51a and 51b are connected. Spacers 59 are attached to the upper and lower inner surfaces of the fitted portion 54a. The spacer 59 is formed in a U-shaped cross section (a U-shaped cross section) having a vertical portion 59d extending vertically from the front and rear ends of a horizontal portion 59c that is horizontally disposed along the upper and lower inner surfaces of the fitted portion 54a.

  Engagement holes 54d are provided on the upper and lower surfaces of the fitted part 54a, and an engagement claw 59a that engages with the engagement hole 54d is provided on the horizontal part 59c of the spacer 59. The spacer 59 is inserted into the fitted portion 54a and is locked by the engagement between the engagement hole 54d and the engagement claw 59a. Thereby, the heater 53 is attached to the holder 54 to which the spacer 59 is previously locked, and the heater unit 28 can be easily assembled.

  Holes 54c and 59b are formed in the fitted portion 54a and the spacer 59, respectively. Screws 57 (see FIG. 5) inserted through the holes 54 c and 59 b are screwed into the heater 53, and the heater 53 is held by the holder 54. At this time, the spacer 59 is disposed between the heater 53 and the inner surface of the fitted portion 54a. For this reason, the heater 53 is disposed in contact with the horizontal portion 59c and the vertical portion 59d of the spacer 59 and away from the upper and lower and front and rear inner surfaces of the fitted portion 54a. The heater 53 is screwed so that a predetermined amount of gap is provided between the bottom surface of the fitting portion 54a facing the side end surface (the inner surface on the terminal portion 54b side).

  The spacer 59 in contact with the heater 53 is made of a material having high heat resistance and flame retardancy that does not deform or ignite even when the heater 53 has a higher heat generation temperature than in normal use due to abnormality. Since the holder 54 is not in direct contact with the heater 53 by the spacer 59, the heat transmitted to the holder 54 is lower than that of the spacer 59. For this reason, the holder 54 can use a material having one or both of heat resistance and flame retardance lower than those of the spacer 59. At this time, the holder 54 is lower in heat resistance or flame retardance than the spacer 59, but is not deformed or ignited by the heat transmitted when the heater 53 has a higher heat generation temperature than in normal use due to abnormality. It consists of a material with heat resistance and flame resistance.

  For example, the spacer 59 is made of PPS (polyphenylene sulfide) resin, and the holder 54 is made of PPE (polyphenylene ether) resin. The heat resistance of the PPS resin is about 260 ° C., and the flame retardancy is UL standard 94 grade 5V. A PPE resin having a heat resistance of about 130 ° C. and a flame retardancy of UL standard 94 grade 5V is used and is less expensive than a PPS resin. If there is no problem in safety, use a PPE resin (for example, heat resistance is about 130 ° C. and flame resistance is UL standard 94 grade V-0) which is lower in heat resistance and flame retardancy than PPS resin. May be.

  As a result, the spacer 59 having high heat resistance and flame retardancy is arranged at the portion in contact with the heater 53, and an inexpensive material having lower heat resistance and flame retardance than the spacer 59 is used for the holder 54 having a large volume. Therefore, the cost of the heater unit 28 and the air conditioner 1 can be reduced.

  FIG. 8 shows a perspective view of the left holder 55. In the figure, the X direction is the left-right direction, the Y direction is the front-rear direction, and the Z direction is the up-down direction. The holder 55 is provided with a plurality of fitting portions 55a which are respectively fitted with a plurality of heaters 53 arranged vertically. The same spacer 59 as described above is attached to the upper and lower inner surfaces of the fitted portion 55a. Similarly to the above, engagement holes 55d are provided on the upper and lower surfaces of each fitted portion 55a, and the spacer 59 inserted into the fitted portion 55a is locked by engagement between the engagement hole 55d and the engagement claw 59a. Is done.

  Screw holes 55 c are formed on the upper and lower surfaces of the holder 55. Screws 56 and 57 (see FIG. 5) inserted through the screw holes 55 c and 59 b are screwed into the heater 53, and the heater 53 is held by the holder 55. At this time, an annular boss 55 e is formed around the screw hole 55 c on the upper surface of the holder 55.

  As shown in FIGS. 3 and 5, the boss 55e is inserted into a long hole 61a provided in a bracket 61 attached to the inner surface of the air duct 24 as will be described later. The screw 56 is fixed to the upper surface of the boss 55e with a predetermined gap from the bracket 61. For this reason, when the heater 53 expands in the longitudinal direction (left-right direction), the holder 55 slides with respect to the bracket 61 integrally with the heater 53. Thereby, the expansion | swelling of the heater 53 can be absorbed and damage to the ventilation duct 24 to which the bracket 61 is attached can be prevented.

  The right holder 54 may be slidable with respect to the bracket 60 (see FIG. 5). Further, the spacer 59 integral with the heater 53 may be formed to be slidable with respect to the holder 55. That is, the screw hole 55 c of the holder 55 is formed as a long hole, and a boss that penetrates the screw hole 55 c and the long hole 61 a is provided in the spacer 59, and is fixed to the upper surface of the boss of the spacer 59 by the screw 56. Even in this case, the expansion and contraction of the heater 53 can be absorbed.

  Similarly to the above, a spacer 59 is disposed between the heater 53 and the inner surface of the fitted portion 55a. Therefore, the heater 53 is disposed in contact with the horizontal portion 59c and the vertical portion 59d of the spacer 59 and away from the upper and lower and front and rear inner surfaces of the fitted portion 55a. The heater 53 is screwed so that a predetermined amount of gap is provided between the heater 53 and the bottom surface 55f of the fitted portion 55a facing the side end surface.

  The holder 55 is also made of an inexpensive PPE resin that is lower in heat resistance and flame resistance than the spacer 59 in the same manner as the holder 54. Thereby, the cost of the heater unit 28 and the air conditioner 1 can be reduced.

  For example, it is assumed that the temperature of the heater 53 when the heater 53 operates normally is 80 ° C., and the temperature transmitted to the holders 54 and 55 is 60 ° C. When the heater 53 rises to 100 ° C. when it is abnormally heated, a safety device such as a temperature sensor 63 or a temperature fuse (not shown) is activated to stop energization of the heater 53. At this time, heat transferred to the holders 54 and 55 due to abnormal heating is less than that of the spacer 59, and the temperature rise of the holders 54 and 55 is, for example, 80 ° C. at the maximum. Thereby, even if the holders 54 and 55 are made of PPE resin having lower heat resistance and flame retardance than the spacer 59, deformation and ignition can be prevented.

  Note that the holders 54 and 55 and the spacer 59 may be formed of other materials. In addition, the holders 54 and 55 are lower in heat resistance and equivalent in flame retardance than the spacer 59, but an inexpensive material having low heat resistance and high flame retardance may be used. In addition, the holders 54 and 55 may be made of an inexpensive material that has lower flame resistance than that of the spacer 59 and has the same or higher heat resistance, or an inexpensive material that has lower heat resistance and flame resistance.

  As an example of the safety device, the temperature sensor 63 may be a self-resetting thermostat. In the self-resetting thermostat, the contact is closed and current flows during normal use, but the contact is released when the heater 53 is abnormally heated and the heater temperature rises. Thereby, the current supply to the heater 53 is stopped.

  Further, in order to enhance safety, it may be used in combination with a one-shot (one-time) thermal fuse. In this case, the temperature at which the thermal fuse is activated (tripped) is set higher than the temperature at which the self-resetting thermostat is activated (tripped). For example, a self-resetting thermostat having an operating (trip) temperature of 100 ° C. is used, and a thermal fuse having an operating (trip) temperature of 130 ° C. is used. As a result, even if the self-recovery thermostat breaks down, it is possible to ensure safety by operating the thermal fuse.

  Further, a thermistor may be used as the temperature sensor 63, and the thermistor temperature may be detected and controlled by a control device such as a microcomputer. Thereby, when the heater 53 is abnormally heated, it can be controlled by software so as to stop the current supply.

  FIG. 9 shows an enlarged view of a portion H in FIG. The terminal portion 54b of the holder 54 is provided with a plurality of terminals 54g sandwiching the first and second electrodes 51a and 51b extending from the heat generating portion 51 of the heater 28. A lead wire 61 (see FIG. 5) is connected to the terminal 54g, and power is supplied to the heat generating portion 51.

  The holder 54 is provided with a separating portion 58 in the vicinity of the heat generating portion 51 for separating the first and second electrodes 51a and 51b by a predetermined interval in the vertical direction in the figure. The separation portion 58 has a bottom surface portion 58a disposed between the holder 54 and the first and second electrodes 51a and 51b.

  Accordingly, the heated first and second electrodes 51 a and 51 b are arranged away from the holder 54. Further, the separation portion 58 in contact with the first and second electrodes 51a and 51b is formed of PPS resin having high heat resistance and flame retardancy. Therefore, the cost of the heater unit 28 and the air conditioner 1 can be reduced. One of the heat resistance or flame retardancy of the holder 54 may be lower than that of the separation portion 58, and the other may be equivalent.

  10 and 11 show the AA and BB sectional views of FIG. A support column 64 integral with the air duct 24 is provided at the lower right portion of the air duct 24. The column portion 64 is provided with a screw portion 64a that protrudes forward and has a screw hole (not shown) at the top. An angle 65 made of metal is erected on the left bottom of the air duct 24. The angle 65 is provided with a screw portion 65a having a screw hole (not shown) on the upper surface.

  Mounting portions 60b (see FIG. 3) and 61b having holes through which screws are inserted are formed in the brackets 60 and 61 of the heater unit 28, respectively. The mounting portions 60b and 61b of the brackets 60 and 61 are screwed into the screw holes of the screw portions 64a and 65a by inserting a screwdriver into the gap D between the indoor heat exchanger 27 and the blower fan 25. Thereby, the heater unit 28 is attached to the housing 20 of the indoor portion 2.

  FIG. 12 is a perspective view showing a state when the heater unit 28 of the air conditioner 1 is attached and detached. FIGS. 13 and 14 show a cross-sectional view taken along lines AA and BB at this time, respectively. When the heater unit 28 is attached or detached, the outer cover 30 (see FIG. 2) and the duct member 29 are removed.

  Then, the screws for fixing the brackets 60 and 61 are removed, and the heater unit 28 is removed upward along the indoor heat exchanger 27 from the gap D between the indoor heat exchanger 27 and the blower fan 25. Further, the heater unit 28 is inserted from above along the indoor heat exchanger 27 through the gap D between the indoor heat exchanger 27 and the blower fan 25, and is mounted by screwing brackets 60 and 61.

  Thereby, the heater unit 28 can be attached and detached without removing the indoor heat exchanger 27 connected to the compressor 41 (see FIG. 1) via the refrigerant pipe 47. Therefore, the heater unit 28 can be easily attached when the air conditioner 1 is assembled, and the heater unit 28 can be easily replaced in the event of a failure.

  FIG. 15 is a perspective view in which the indoor heat exchanger 27 is omitted from FIG. A plurality of rectangular openings 24 a are opened on the lower back surface of the air duct 24. As shown in the rear perspective view of FIG. 16, when the ventilation damper 31 is opened and the blower fan 25 is driven, the outside air can flow into the blower passage 23 through the opening 24a to ventilate the room.

  FIG. 17 is a rear view of the housing 20 in the indoor portion 2. The opening 24a has a larger opening area per unit area in the leeward side than the leeward side on the downstream side of the ventilation damper 31 that is arranged to be biased to the left (rightward in the rear view of FIG. 17). Thereby, the quantity of the external air which flows into the ventilation path 23 (refer FIG. 2) from the opening part 24a can be made uniform in the left-right direction. Therefore, it is possible to reduce the unbalance of the amount of air flowing through the air passage 23 and improve the balance. Thereby, the noise which arises at the time of imbalance of air quantity can be reduced.

  As shown in FIGS. 18 and 19, the opening 24 a may be a square or a circle, or another shape.

  In the air conditioner 1 having the above configuration, when the cooling operation is started, the refrigeration cycle is operated by driving the compressor 41. Thereby, the indoor heat exchanger 27 becomes an evaporator on the low temperature side of the refrigeration cycle, and the outdoor heat exchanger 42 becomes a condenser on the high temperature side of the refrigeration cycle. The outdoor heat exchanger 42 is cooled by the outdoor fan 43 and dissipates heat. Indoor air flows into the air passage 23 from the suction port 21 by driving the blower fan 25, and air that has been cooled down by exchanging heat with the indoor heat exchanger 27 is sent out through the air outlet 22 into the room. Thereby, indoor cooling is performed.

  When the heating operation is started, the refrigeration cycle is operated by driving the compressor 41. Thereby, the indoor heat exchanger 27 becomes a condenser on the high temperature side of the refrigeration cycle, and the outdoor heat exchanger 42 becomes an evaporator on the low temperature side of the refrigeration cycle. The outdoor heat exchanger 42 is heated by an outdoor fan 43. Indoor air flows into the air passage 23 from the suction port 21 by driving the blower fan 25, and heat is exchanged with the indoor heat exchanger 27 to raise the temperature.

  Further, when the heater 53 is driven, the temperature in the air passage 23 is further increased. At this time, since the air flowing through the air passage 23 is heat exchanged with the fins 52 of the heater 53, a decrease in the amount of heat generated due to overheating of the heat generating part 51 formed of a PTC heater is prevented. Thereby, heating efficiency can be improved.

  Further, the blower fan 25 and the indoor heat exchanger 27 are formed so as to extend to the side of the heater 53 and also face the terminal portion 54 b of the holder 54 of the heater unit 28. Thereby, while being able to enlarge the heat exchange area of the indoor heat exchanger 27, the terminal part 54b can be cooled by circulation of air.

  The air heated by the indoor heat exchanger 27 and the heater 53 is sent into the room through the outlet 22 and the room is heated. The compressor 41 may be stopped during the heating operation, and the temperature of the air may be raised only by the heater 53. Further, in an integrated air conditioner dedicated to cooling that can only perform cooling by operation of the refrigeration cycle, a heater 53 may be provided so that heating operation by the heater 53 can be performed.

  When the ventilation damper 31 is opened, outside air flows into the blower passage 23 through the opening 24 a of the blower duct 24 by driving the blower fan 25. Thereby, outside air is mixed with the air heat-exchanged with the indoor heat exchanger 27 and the heater 53, and it sends out indoors. Therefore, indoor ventilation can be performed.

  According to this embodiment, at least one of the heat resistance and flame retardancy of the spacer 59 disposed between the holders 54 and 55 and the heater 53 in contact with the heater 53 is higher than that of the holders 54 and 55. By using a material having high property and flame retardancy for the spacer 59, the heat resistance or flame retardancy of the holders 54 and 55 can be lowered. Therefore, the amount of expensive materials used can be reduced, and the cost of the air conditioner 1 can be reduced. It should be noted that the same effect can be obtained when the heater 53 without the fin portion 52 is held by the holders 54 and 55.

  Further, since the holder 55 is slidably attached to the bracket 61 for attaching the left holder 55 to the housing 20, the air duct inside the housing 20 to which the bracket 61 is attached by absorbing expansion due to heating of the heater 53. 24 can be prevented from being damaged. Similarly, the right holder 54 may be slidable with respect to the bracket 60. A spacer 59 integral with the heater 53 may be formed to be slidable with respect to the holder 55.

  Further, since the spacer 59 has the locking claw 59 a that is locked to the holders 54, 55, the heater 53 can be held by the holders 54, 55 with the spacer 59 attached to the holders 54, 55. Therefore, the heater unit 28 can be easily assembled.

  Moreover, since at least one of the heat resistance and flame retardance of the separation part 58 which separates the 1st, 2nd electrodes 51a and 51b which a PTC heater opposes is higher than the holders 54 and 55, heat resistance and flame retardance are high. The material can be used for the separation portion 58 to reduce the heat resistance or flame retardancy of the holders 54 and 55. Therefore, the cost of the air conditioner 1 can be further reduced.

  In addition, since the spacer 59 and the separation portion 58 in contact with the heater 53 are made of PPS resin, high heat resistance and flame retardancy can be realized. Further, since the holders 54 and 55 are made of PPE resin, they can be formed at low cost.

  Next, FIG. 20 has shown the rear view of the housing | casing 20 of the indoor part 2 of the air conditioner 1 of 2nd Embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. This embodiment is different from the first embodiment in the configuration of the flow path between the opening 24a provided in the air duct 24 and the ventilation damper 31. Other parts are the same as those of the first embodiment.

  Between the rear surface of the air duct 24 and the partition wall 5, a plurality of divided passages 24 c divided by the ribs 24 b and having substantially the same flow area are provided. The rib 24b is integrally formed with the air duct 24. A plurality of openings 24a are arranged side by side on the air duct 24, and the openings 24a and the ventilation damper 31 are connected to each other by the divided passages 24c.

  Thereby, the quantity of the external air which flows into the ventilation path 23 (refer FIG. 2) from the opening part 24a can be made uniform in the left-right direction. Therefore, it is possible to reduce the unbalance of the amount of air flowing through the air passage 23 and improve the balance. Thereby, the noise which arises at the time of imbalance of air quantity can be reduced.

  Next, FIG. 21 has shown the rear view of the housing | casing 20 of the indoor part 2 of the air conditioner 1 of 3rd Embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. This embodiment is different from the first embodiment in the configuration of the flow path between the opening 24a provided in the air duct 24 and the ventilation damper 31. Other parts are the same as those of the first embodiment.

  Between the back surface of the air duct 24 and the partition wall 5, a flow path bent in a U shape is formed by the rib 24b. The rib 24b is integrally formed with the air duct 24. The opening 24 a has a larger opening area per unit area on the downstream side of the ventilation damper 31 and on the leeward side than on the leeward side. Thereby, similarly to 1st Embodiment, the imbalance of the air quantity which distribute | circulates the ventilation path 23 can be reduced and it can be made in good balance. Thereby, the noise which arises at the time of imbalance of air quantity can be reduced.

  A plurality of shielding plates 24d having small holes 24e are provided in the flow path between the ventilation damper 31 and the opening 24a. A silencer is constituted by the shielding plate 24d, and the noise of the airflow flowing from the ventilation damper 31 can be further reduced. Further, three or more shielding plates 24d are provided, and the shielding plates 24d are arranged at a plurality of intervals L1 and L2. Thereby, it can mute with respect to the sound of a some frequency, and a noise can further be reduced. In addition, you may provide the shielding board 24d in the division | segmentation channel | path 24c (refer FIG. 20) of 2nd Embodiment.

  Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

  According to this invention, it can utilize for the air conditioner which has a heater.

DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Indoor part 3 Bottom plate 4 Outdoor exterior 5 Partition wall 20 Housing | casing 21 Suction inlet 22 Outlet 23 Blower passage 24 Blower duct 24a Opening part 25 Blower fan 26 Louver 27 Indoor heat exchanger 28 Heating heater unit 29 Duct member DESCRIPTION OF SYMBOLS 30 Exterior cover 31 Ventilation damper 41 Compressor 42 Outdoor heat exchanger 43 Outdoor fan 47 Refrigerant tube 51 Heat generation part 52 Fin part 53 Heater 54, 55 Holder 54a, 55a Fit part 54b Terminal part 54d, 55d Engagement hole 56, 57 Screw 58 Separating part 59 Spacer 59a Engaging claw 60, 61 Bracket 63 Temperature sensor 64 Supporting part 65 Angle D Gap

Claims (8)

  A housing having a suction port and an air outlet, a heater that is arranged in the housing and heats the air flowing into the housing from the suction port, and a holder that holds the heating heater and is attached to the housing And a spacer arranged in contact with the heater and between the holder and the heater, wherein at least one of heat resistance and flame retardancy of the spacer is higher than that of the holder Harmony machine.   The heater is formed to extend in one direction, the holder holds both ends of the heater in the longitudinal direction, and a bracket for attaching the holder to the housing is provided, and the holder is slidable with respect to the bracket The air conditioner according to claim 1, wherein the air conditioner is attached to the air conditioner.   The heater is formed to extend in one direction, the holder holds both ends of the heater in the longitudinal direction, a bracket for attaching the holder to the housing is provided, and the spacer fixed to the heater is The air conditioner according to claim 1, wherein the air conditioner is slidable with respect to the holder.   The air conditioner according to any one of claims 1 to 3, wherein the spacer includes a locking claw that is locked to the holder.   The air conditioner according to any one of claims 1 to 4, wherein the spacer is made of PPS resin.   The air conditioner according to claim 5, wherein the holder is made of PPE resin.   The heater has a PTC heater, and is provided between the terminal portion connecting the first and second electrodes facing the PTC heater, and the first and second electrodes extending from the PTC heater. And a separation part that guides the first and second electrodes to the terminal part by a predetermined amount, and at least one of heat resistance and flame retardancy of the separation part is higher than that of the holder. The air conditioner according to any one of claims 1 to 6.   The air conditioner according to claim 7, wherein the separation portion is made of PPS resin.

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