JP2010071536A - Electromagnetic induction heating unit and air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic induction heating unit hardly causing water retention even in the case of determining a position to refrigerant piping. <P>SOLUTION: The electromagnetic induction heating unit for heating the refrigerant piping with the outer surface composed of an SUS pipe F2, includes a coil 68 and a first hexagonal nut 61. The coil 68 surrounds the refrigerant piping. The first hexagonal nut 61 determines a relative position relationship between the coil 68 and the refrigerant piping. A continuous space continuous from one side from which the refrigerant piping extends with respect to the first hexagonal nut 61, to the other side which is opposite to the one side with respect to the first hexagonal nut 61 exists between the first hexagonal nut 61 and the refrigerant piping. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electromagnetic induction heating unit and an air conditioner.

  The refrigeration cycle includes a radiator that releases heat of the refrigerant, a heater that gives heat to the refrigerant, and the like. For example, the refrigerant circulating in the refrigeration cycle obtains heat by exchanging heat with indoor air in the cooling operation cycle, and exchanges heat with outdoor air in the heating operation cycle. Getting fever.

According to the refrigeration cycle of the air conditioner described in Patent Literature 1 shown below, there is a system that not only obtains heat from indoor air or outdoor air as described above, but also obtains heat from the refrigerant separately by a refrigerant heating device. Proposed. In this refrigerant heating apparatus, heat is applied to the refrigerant flowing through the heat exchanger by heating the heat exchanger through which the refrigerant flows with a burner. Thus, since this air conditioner employs a refrigerant heating device, when the refrigerant requires heat, it is possible to heat the refrigerant without being restricted by indoor or outdoor temperature. ing.
JP-A-8-210720

  As the refrigerant heating device as described above, an electromagnetic induction heating method can be adopted as an electric method, instead of a heating method using a burner or the like. For example, an electromagnetic induction coil is wound around a refrigerant pipe containing a magnetic material, and the refrigerant pipe can be caused to generate heat due to a magnetic flux generated by passing an electric current through the electromagnetic induction heating coil. And the refrigerant | coolant can be heated using the heat_generation | fever in this refrigerant | coolant piping.

  However, when the position of the refrigerant heating unit is determined so that the target position of the refrigerant pipe can be heated, the refrigerant heating unit may be disposed so as to cover the periphery of the refrigerant pipe. When water is present on the surface of the refrigerant pipe, there is a possibility that the water may stay at a portion where the refrigerant heating unit and the refrigerant pipe are in contact with each other.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an electromagnetic induction heating unit and an air conditioner that are unlikely to cause water retention even when the position is determined with respect to the refrigerant pipe. There is to do.

  An electromagnetic induction heating unit according to a first aspect of the present invention is an electromagnetic induction heating unit that heats a refrigerant pipe and / or a member that is in thermal contact with a refrigerant flowing in the refrigerant pipe, and includes a coil and a positioning portion. The coil is disposed in the vicinity of the refrigerant pipe. The positioning unit defines a relative positional relationship between the coil and the refrigerant pipe. Between the positioning part and the refrigerant pipe, continuous from the one side where the refrigerant pipe extends to the positioning part to the other side opposite to the one side with respect to the positioning part. There is space. Here, the “refrigerant pipe” includes any of a portion constituting the inner surface, a portion constituting the outer surface, and a portion located between the inner surface and the outer surface. To do. That is, the member that generates eddy current by electromagnetic induction may constitute the outer surface of the refrigerant pipe, may constitute the inner surface of the refrigerant pipe, or between the outer surface and the inner surface of the refrigerant pipe. May be located. The “member that makes thermal contact with the refrigerant flowing in the refrigerant pipe” includes, for example, a member that is arranged on the refrigerant passage in the pipe and is in direct contact with the refrigerant, or a refrigerant pipe that is arranged outside the refrigerant pipe. The member etc. which heat are included. In addition, the “refrigerant pipe” and the “member in thermal contact with the refrigerant flowing in the refrigerant pipe” are preferably those containing at least a part of a magnetic substance or an alloy thereof. From the viewpoint of efficient heating with respect to power consumption, the magnetic material is preferably a ferromagnetic material.

  In this electromagnetic induction heating unit, when the position of the coil relative to the refrigerant pipe is determined by the positioning part, even if water is generated on the surface in the vicinity of the positioning part of the refrigerant pipe, the water is moved through the continuous space. Can do. Thereby, retention of water can be suppressed.

  The electromagnetic induction heating unit of the second invention is the electromagnetic induction heating unit of the first invention, wherein the coil surrounds at least a part of the refrigerant pipe.

  In this electromagnetic induction heating unit, a part of the magnetic flux generated by passing a current through the coil can be made to extend in the direction in which the refrigerant pipe extends. For this reason, the heating efficiency by electromagnetic induction can be improved when the longitudinal direction of the magnetic body contained in the refrigerant pipe and the axial direction of the refrigerant pipe are substantially the same.

  The electromagnetic induction heating unit of the third invention is the electromagnetic induction heating unit of the first invention or the second invention. In the electromagnetic induction heating unit of the first invention or the second invention, the positioning portion is a relative position relationship between the coil and the refrigerant pipe because the force acts on the refrigerant pipe side. Is stipulated.

  In this electromagnetic induction heating unit, in order to determine the relative position between the coil and the refrigerant pipe, even if the positioning portion and the refrigerant pipe exert forces on each other, the fixation is further strengthened. A continuous space is secured in a portion where no force is applied to each other. Thereby, it becomes possible to suppress the retention of water while strengthening the fixation.

  The electromagnetic induction heating unit according to a fourth aspect of the present invention is the electromagnetic induction heating unit according to the third aspect of the present invention, wherein the positioning portion is formed so that the portion where the force acts on the refrigerant pipe side has a surface shape.

  In this electromagnetic induction heating unit, since the portion where the force acts on the refrigerant piping side of the positioning portion is formed in a surface shape, the positioning portion has an area where the force can act on the refrigerant piping side. Widely secured. For this reason, it becomes possible to determine the relative position of a coil and refrigerant | coolant piping more firmly.

  The electromagnetic induction heating unit according to a fifth aspect of the present invention is the electromagnetic induction heating unit according to the third or fourth aspect of the present invention, wherein the portion of the positioning portion where the force acts on the refrigerant piping side makes a round around the refrigerant piping side. Is not provided.

  In this electromagnetic induction heating unit, a force for determining a relative position with respect to the refrigerant pipe can be applied by a portion where the positioning portion exists. And the continuous space can be ensured by the part which has interrupted among the parts which exist around the refrigerant | coolant piping among positioning parts. Thereby, the action of the force for positioning and the securing of the continuous space can be reliably achieved.

  The electromagnetic induction heating unit according to a sixth aspect of the invention is the electromagnetic induction heating unit according to the third or fourth aspect, wherein the portion of the positioning portion where the force is acting on the refrigerant pipe side is formed continuously. One end side that is an end portion of the portion that continues to be stretched is not connected to the other end side that is an end portion of the portion that continues to be stretched other than the one end side.

  In this electromagnetic induction heating unit, a force for determining a relative position to the refrigerant pipe can be applied by a portion where the positioning portion is present. And the continuous space can be ensured by the part where the continuity in the circumferential direction of the positioning part is interrupted. Thereby, the action of the force for positioning and the securing of the continuous space can be reliably achieved.

  The electromagnetic induction heating unit according to a seventh aspect of the invention is the electromagnetic induction heating unit according to the third or fourth aspect of the invention, wherein the portion of the refrigerant pipe that receives the action of the force from the positioning portion makes a round around the refrigerant pipe side. Absent.

  In this electromagnetic induction heating unit, a force for determining a relative position to the refrigerant pipe can be applied by a portion where the positioning portion is present. And continuous space can be ensured by the part which has not received the effect | action of the force from a positioning part among refrigerant | coolant piping. Thereby, the action of the force for positioning and the securing of the continuous space can be reliably achieved.

  The electromagnetic induction heating unit according to an eighth aspect of the present invention is the electromagnetic induction heating unit according to any one of the first to seventh aspects, further comprising an interposition part located at least at a part between the refrigerant pipe and the positioning part. Yes. The positioning part has a relative position with respect to the refrigerant pipe via the interposition part. The continuous space is continuously provided from one side to the other side in the direction in which the refrigerant pipe extends between the interposition part and the refrigerant pipe. Note that there may be only one interposition part, or a plurality of interposition parts may be provided so as to overlap in the radial direction.

  In this electromagnetic induction heating unit, by providing the interposition portion, the size and shape of the interposition portion can be selected so as to match the distance between the outside of the refrigerant pipe and the inside of the positioning portion. For example, when various sizes and shapes of intervening portions are prepared, by selecting and using appropriate ones from these intervening portions, electromagnetic induction heating is performed on various sizes of refrigerant pipes. The unit can be fixed.

  An electromagnetic induction heating unit according to a ninth aspect of the present invention is the electromagnetic induction heating unit according to any one of the first to seventh aspects of the present invention, further comprising an interposition part located at least at a part between the refrigerant pipe and the positioning part. Yes. The positioning part has a relative position with respect to the refrigerant pipe via the interposition part. The continuous space is provided continuously from one side to the other side in the direction in which the refrigerant pipe extends between the interposition part and the positioning part. Note that there may be only one interposition part, or a plurality of interposition parts may be provided so as to overlap in the radial direction.

  In this electromagnetic induction heating unit, by providing the interposition portion, the size and shape of the interposition portion can be selected so as to match the distance between the outside of the refrigerant pipe and the inside of the positioning portion. For example, when various sizes and shapes of intervening portions are prepared, by selecting and using appropriate ones from these intervening portions, electromagnetic induction heating is performed on various sizes of refrigerant pipes. The unit can be fixed.

  The electromagnetic induction heating unit according to a tenth aspect of the invention is the electromagnetic induction heating unit according to any one of the first to ninth aspects, wherein the distance from the inner side to the outer side on the refrigerant piping side of the continuous space is 1 mm or more.

  If the clearance between the refrigerant pipe and the members existing around it is designed to be 1 mm or more, when the water stays there and becomes ice, the refrigerant pipe and the surrounding members There is a risk that it will be damaged due to a large burden.

  Even when the gap between the refrigerant pipe and the members existing around the refrigerant pipe is designed to be 1 mm or more, a continuous space is formed in the electromagnetic induction heating unit. And the reliability of the device can be improved.

  The electromagnetic induction heating unit according to an eleventh aspect of the present invention is the electromagnetic induction heating unit according to any one of the first to tenth aspects, wherein the thickness from the inner side on the refrigerant piping side of the positioning portion to the outer side opposite to the inner side is 5 mm or more. It is.

  If the width from the inner side to the outer side of the positioning portion is 5 mm or more, the water stays there and becomes ice, and the ice may grow further.

  Even when the clearance between the refrigerant pipe and the members existing around the refrigerant pipe is designed to be 1 mm or more, a continuous space is formed in the electromagnetic induction heating unit. It becomes possible to improve the reliability.

  An electromagnetic induction heating unit according to a twelfth aspect of the present invention is the electromagnetic induction heating unit according to any one of the first to eleventh aspects of the present invention, wherein the positioning portion has a shape surrounding the refrigerant pipe from around. The positioning part is inclined so that at least a part of the inner part which is the end part on one side where the refrigerant pipe extends and is on the refrigerant pipe side is directed toward the other side which is opposite to the one side as it approaches the inside. Has the shape.

  In this electromagnetic induction heating unit, water generated on the outer surface of the refrigerant pipe can be guided to the continuous space.

  The electromagnetic induction heating unit according to a thirteenth aspect of the present invention is the electromagnetic induction heating unit according to any one of the first to twelfth aspects of the present invention, wherein the positioning portion is a first member having an inner diameter larger than the outer diameter of the refrigerant pipe and provided with a thread groove. And a second member that can be screwed by acting on the thread groove and that determines a relative position with respect to the refrigerant pipe in the screwed state.

  In this electromagnetic induction heating unit, the relative position between the refrigerant pipe and the positioning portion can be easily determined by screwing work.

  The electromagnetic induction heating unit according to a fourteenth aspect is the electromagnetic induction heating unit according to the thirteenth aspect, wherein the positioning portion acts on the refrigerant piping side by elastically deforming as the first member and the second member are screwed together. A third member that increases the force is further included.

  In this electromagnetic induction heating unit, the strength of positioning can be adjusted according to the degree of screwing. Further, by fixing using the third member, it is possible to reliably maintain the state where the electromagnetic induction heating unit is fixed to the refrigerant pipe.

  The electromagnetic induction heating unit according to a fifteenth aspect of the present invention is the electromagnetic induction heating unit according to any one of the first to fourteenth aspects, wherein the positioning portion includes a first fixing member having an inner diameter larger than the outer diameter of the refrigerant pipe, and a radial direction. And a second fixing member having an outer edge larger than the outer edge of the first fixing member. The second fixing member has an opening penetrating in a direction in which the refrigerant pipe extends.

  In this electromagnetic induction heating unit, even when the water generated in the refrigerant pipe moves away from the refrigerant pipe and onto the second fixing member, the water is passed through the opening provided in the second fixing member. Can be moved further. Thereby, it can suppress that water stagnates on the 2nd fixing member and becomes ice.

  The electromagnetic induction heating unit according to a sixteenth aspect of the present invention is the electromagnetic induction heating unit according to the fifteenth aspect, further comprising an intermediate portion holding the coil while ensuring a space between the refrigerant pipe and the coil. When viewed from the direction in which the refrigerant pipe extends, the opening of the second fixing member is located between the intermediate portion and the refrigerant pipe.

  In this electromagnetic induction heating unit, even when water flows outside the first fixing member, the water can be moved through the opening of the second fixing member. And the water which moves through opening of a 2nd fixing material is drained through between an intermediate part and refrigerant | coolant piping. Thereby, even if water flows outside the first fixing member, it can be surely drained. Moreover, it becomes possible to suppress that water is transmitted to the coil.

  The electromagnetic induction heating unit according to a seventeenth aspect of the present invention is the electromagnetic induction heating unit according to any one of the first to sixteenth aspects of the present invention, wherein the positioning portion is one side where the refrigerant pipe extends and the other side opposite to the one side. The force is acting on the refrigerant piping side at at least two locations.

  In this electromagnetic induction heating unit, since positioning at a plurality of locations can be performed, the relative position between the positioning portion and the refrigerant pipe can be determined more reliably.

  An electromagnetic induction heating unit according to an eighteenth aspect of the present invention is the electromagnetic induction heating unit according to any one of the first to seventeenth aspects of the present invention, wherein the positioning portion has a portion that forms a ring while making a round around the outside of the refrigerant pipe. .

  In this electromagnetic induction heating unit, since it has a part which makes a circle and makes a ring, the positioning part can perform positioning with respect to the refrigerant pipe more firmly.

  An air conditioner according to a nineteenth aspect of the present invention is an air conditioner including any one of the electromagnetic induction heating units according to the first to eighteenth aspects, wherein the refrigerant pipe extends in a substantially vertical direction when the air conditioner is installed. ing.

  In this air conditioner, when the refrigerant pipe is provided in a substantially vertical direction, water is generated above the electromagnetic induction heating unit, and water may flow between the refrigerant pipe and the positioning portion. Thus, even if water flows between the refrigerant pipe and the positioning portion, the water can be moved through the continuous space. Thereby, even if it is a case where refrigerant | coolant piping is extended and arrange | positioned in the substantially perpendicular direction, retention of water can be suppressed.

  An air conditioner according to a twentieth aspect of the invention includes the electromagnetic induction heating unit according to any one of the first aspect of the invention to the eighteenth aspect of the invention, a compression mechanism, a refrigerant cooler, an expansion mechanism, and a refrigerant heater. The electromagnetic induction heating unit is provided in a refrigerant pipe on the suction side that extends to the suction side of the compression mechanism.

  In this air conditioner, the temperature of the refrigerant pipe extending to the suction side of the compression mechanism falls below the ambient temperature, so that the ice is thawed by starting electromagnetic induction heating even when the outer surface is frosted. Can be made. Even if water may be generated by this, the water can be moved through the continuous space, and the retention of water can be suppressed.

  In the electromagnetic induction heating unit according to the first aspect of the invention, it is possible to suppress water retention.

  In the electromagnetic induction heating unit of the second invention, heating efficiency by electromagnetic induction can be improved when the longitudinal direction of the magnetic body included in the refrigerant pipe and the axial direction of the refrigerant pipe are substantially the same.

  In the electromagnetic induction heating unit according to the third aspect of the invention, it becomes possible to suppress water retention while strengthening the fixation.

  In the electromagnetic induction heating unit according to the fourth aspect of the invention, the relative position between the coil and the refrigerant pipe can be determined more firmly.

  In the electromagnetic induction heating unit of the fifth aspect of the invention, it is possible to reliably achieve both the action of the force for positioning and the securing of the continuous space.

  In the electromagnetic induction heating unit according to the sixth aspect of the invention, it is possible to reliably achieve both the action of the force for positioning and the securing of the continuous space.

  In the electromagnetic induction heating unit according to the seventh aspect of the invention, it is possible to reliably achieve both the action of the force for positioning and the securing of the continuous space.

  In the electromagnetic induction heating unit according to the eighth aspect of the invention, the size and shape of the interposition part can be selected.

  In the electromagnetic induction heating unit of the ninth invention, the size and shape of the interposition part can be selected.

  In the electromagnetic induction heating unit according to the tenth aspect, the reliability of the device can be improved.

  In the electromagnetic induction heating unit according to the eleventh aspect, the reliability of the device can be improved.

  In the electromagnetic induction heating unit according to the twelfth aspect, water generated on the outer surface of the refrigerant pipe can be guided to the continuous space.

  In the electromagnetic induction heating unit according to the thirteenth aspect, the fixing can be easily performed by screwing work.

  In the electromagnetic induction heating unit according to the fourteenth aspect of the invention, the strength of positioning can be adjusted according to the degree of screwing, and the state where the electromagnetic induction heating unit is fixed to the refrigerant pipe can be reliably maintained. Become.

  In the electromagnetic induction heating unit according to the fifteenth aspect, water can be prevented from staying on the second fixing member and becoming ice.

  In the electromagnetic induction heating unit according to the sixteenth aspect of the present invention, even if water flows outside the first fixing member, it can be surely drained.

  In the electromagnetic induction heating unit according to the seventeenth aspect, the relative position between the positioning portion and the refrigerant pipe can be determined more reliably.

  In the electromagnetic induction heating unit according to the eighteenth aspect of the present invention, positioning with respect to the refrigerant pipe can be performed more firmly.

  In the air conditioner according to the nineteenth aspect of the present invention, water retention can be suppressed even when the refrigerant pipe is arranged extending in a substantially vertical direction.

  In the air conditioner according to the twentieth aspect of the invention, the temperature of the refrigerant pipe extending to the suction side of the compression mechanism falls below the ambient temperature, so that water generated by thawing is drained even when the outer surface is frosted. Can do.

  Hereinafter, an electromagnetic induction heating unit 6 and an air conditioner 1 including the electromagnetic induction heating unit 6 according to an embodiment of the present invention will be described by way of example with reference to the drawings.

<1-1> Air conditioner 1
FIG. 1 is a refrigerant circuit diagram showing a refrigerant circuit 10 of the air conditioner 1.

  The air conditioner 1 is an air conditioner in a space where a use side device is arranged by connecting an outdoor unit 2 as a heat source side device and an indoor unit 4 as a use side device by a refrigerant pipe. , Compressor 21, four-way switching valve 22, outdoor heat exchanger 23, outdoor electric expansion valve 24, accumulator 25, outdoor fan 26, indoor heat exchanger 41, indoor fan 42, hot gas bypass valve 27, capillary tube 28 and An electromagnetic induction heating unit 6 and the like are provided.

  The compressor 21, the four-way switching valve 22, the outdoor heat exchanger 23, the outdoor electric expansion valve 24, the accumulator 25, the outdoor fan 26, the hot gas bypass valve, the capillary tube 28, and the electromagnetic induction heating unit 6 are included in the outdoor unit 2. Contained. The indoor heat exchanger 41 and the indoor fan 42 are accommodated in the indoor unit 4.

  The refrigerant circuit 10 includes a discharge pipe A, an indoor gas pipe B, an indoor liquid pipe C, an outdoor liquid pipe D, an outdoor gas pipe E, an accumulator pipe F, a suction pipe G, a hot gas bypass circuit H, and a branch pipe K. And a merging pipe J. The indoor side gas pipe B and the outdoor side gas pipe E pass a large amount of refrigerant in the gas state, but the refrigerant passing therethrough is not limited to the gas refrigerant. The indoor side liquid pipe C and the outdoor side liquid pipe D pass a large amount of liquid refrigerant, but the refrigerant passing therethrough is not limited to liquid refrigerant.

  The discharge pipe A connects the compressor 21 and the four-way switching valve 22.

  The indoor side gas pipe B connects the four-way switching valve 22 and the indoor heat exchanger 41.

  The indoor side liquid pipe C connects the indoor heat exchanger 41 and the outdoor electric expansion valve 24.

  The outdoor liquid pipe D connects the outdoor electric expansion valve 24 and the outdoor heat exchanger 23.

  The outdoor gas pipe E is connected to the outdoor heat exchanger 23 and the four-way switching valve 22.

  The accumulator pipe F connects the four-way switching valve 22 and the accumulator 25, and extends in the vertical direction when the outdoor unit 2 is installed. An electromagnetic induction heating unit 6 is attached to a part of the accumulator tube F. Of the accumulator tube F, at least the heated portion covered by the electromagnetic induction heating unit 6 is configured such that the SUS (Stainless Used Steel) tube F2 covers the periphery of the copper tube F1 (see FIG. 7). ). Portions other than the SUS pipe among the pipes constituting the refrigerant circuit 10 are made of copper pipes. In addition, the material of the pipe | tube covering the circumference | surroundings of the said copper pipe | tube is not limited to SUS, For example, at least 2 or more types of metals chosen from conductors, such as iron, copper, aluminum, chromium, nickel, and these groups are used. It can be an alloy or the like. Examples of SUS include three types of ferrite, martensite, and austenite, and combinations of these types. Further, the accumulator tube F here does not have to be provided with a magnetic material and a material containing the magnetic material, and may be any material as long as it contains a material to be subjected to induction heating. For example, the magnetic material may constitute all of the accumulator pipe F, or may be formed only on the inner surface of the accumulator pipe F, and is contained in the material constituting the accumulator pipe F pipe. May exist. By performing electromagnetic induction heating in this manner, the accumulator tube F can be heated by electromagnetic induction, and the refrigerant sucked into the compressor 21 via the accumulator 25 can be warmed. Thereby, the heating capability of the air conditioning apparatus 1 can be improved. Further, for example, even when the compressor 21 is not sufficiently warmed at the time of starting the heating operation, the lack of capacity at the time of starting can be compensated for by the rapid heating by the electromagnetic induction heating unit 6. Further, when the four-way switching valve 22 is switched to the cooling operation state and the defrost operation is performed to remove the frost attached to the outdoor heat exchanger 23 or the like, the electromagnetic induction heating unit 6 quickly opens the accumulator tube F. By heating, the compressor 21 can compress the rapidly heated refrigerant as a target. For this reason, the temperature of the hot gas discharged from the compressor 21 can be raised rapidly. Thereby, the time required to thaw frost by defrost operation can be shortened. Thereby, even if it is necessary to perform a defrost operation in a timely manner during the heating operation, the operation can be returned to the heating operation as soon as possible, and the user's comfort can be improved.

  The suction pipe G connects the accumulator 25 and the suction side of the compressor 21.

  The hot gas bypass circuit H connects a branch point A1 provided in the middle of the discharge pipe A and a branch point D1 provided in the middle of the outdoor liquid pipe D. The hot gas bypass circuit 27 is provided with a hot gas bypass valve 27 that can switch between a state that allows passage of refrigerant and a state that does not allow passage of the refrigerant.

  The branch pipe K constitutes a part of the outdoor heat exchanger 23, and a refrigerant pipe extending from the gas side inlet / outlet 23e of the outdoor heat exchanger 23 will be described later in order to increase the effective surface area for heat exchange. It is a pipe branched into a plurality of lines at a branching junction 23k. The branch pipe K extends from the branch junction point 23k to the junction branch point 23j, and joins at the junction branch point 23j.

  The junction pipe J constitutes a part of the outdoor heat exchanger 23 and extends from the junction branch point 23j to the liquid side inlet / outlet 23d of the outdoor heat exchanger 23. The junction pipe J can unify the degree of supercooling of the refrigerant flowing out of the outdoor heat exchanger 23 during the cooling operation, and can defrost frosted ice near the lower end of the outdoor heat exchanger 23 during the heating operation. .

  The four-way switching valve 22 can switch between a cooling operation cycle and a heating operation cycle. In FIG. 1, the connection state when performing the heating operation is indicated by a solid line, and the connection state when performing the cooling operation is indicated by a dotted line. During the heating operation, the indoor heat exchanger 41 functions as a refrigerant cooler, and the outdoor heat exchanger 23 functions as a refrigerant heater. During the cooling operation, the outdoor heat exchanger 23 functions as a refrigerant cooler, and the indoor heat exchanger 41 functions as a refrigerant heater.

  The outdoor heat exchanger 23 includes a gas side inlet / outlet 23e, a liquid side inlet / outlet 23d, a branch junction 23k, a junction branch point 23j, a branch pipe K, a junction pipe J, and a heat exchange fin 23z. The gas side inlet / outlet 23 e is located at the end of the outdoor heat exchanger 23 on the outdoor gas pipe E side, and is connected to the outdoor gas pipe E. The liquid side inlet / outlet 23 d is located at the end of the outdoor heat exchanger 23 on the outdoor liquid pipe D side, and is connected to the outdoor liquid pipe D. The branch junction 23k branches a pipe extending from the gas side inlet / outlet port 23e, and can branch or join the refrigerant according to the direction of the flowing refrigerant. A plurality of branch pipes K extend from each branch portion at the branch junction 23k. The junction branch point 23j joins the branch pipe K and can join or branch the refrigerant according to the direction of the flowing refrigerant. The junction pipe J extends from the junction branch point 23j to the liquid side inlet / outlet 23d. The heat exchange fins 23z are configured by arranging a plurality of plate-like aluminum fins in the thickness direction and arranged at predetermined intervals. The branch pipe K and the merge pipe J both have the heat exchange fins 23z as a common penetration target. Specifically, the branch pipe K and the junction pipe J are disposed so as to penetrate in the plate pressure direction at different portions of the common heat exchange fin 23z.

  The outdoor control unit 12 that controls the devices arranged in the outdoor unit 2 and the indoor control unit 13 that controls the devices arranged in the indoor unit 4 are connected by the communication line 11a, so that the control unit 11 is constituted. The control unit 11 performs various controls for the air conditioner 1.

<1-2> Outdoor unit 2
In FIG. 2, the external appearance perspective view of the front side of the outdoor unit 2 is shown. In FIG. 3, the external appearance perspective view of the back side of the outdoor unit 2 is shown. In FIG. 4, the perspective view about the positional relationship with the outdoor heat exchanger 23 and the outdoor fan 26 is shown. In FIG. 5, the perspective view about the positional relationship with the outdoor heat exchanger 23 and the baseplate 2b is shown.

  The outdoor unit 2 has an outer surface formed by a substantially rectangular parallelepiped outdoor unit casing that includes a top plate 2a, a bottom plate 2b, a front panel 2c, a left side panel 2d, a right side panel 2f, and a back panel 2e.

  In the outdoor unit 2, an outdoor heat exchanger 23, an outdoor fan 26, and the like are arranged, a blower room on the left side panel 2d side, a compressor 21 and an electromagnetic induction heating unit 6 are arranged, and the right side panel 2f side. The machine room is separated by a partition plate (not shown). The electromagnetic induction heating unit 6 is disposed at an upper position in the vicinity of the left side panel 2d and the top plate 2a in the machine room. Here, the heat exchange fins 23z of the outdoor heat exchanger 23 described above are arranged side by side in the plate thickness direction so that the plate thickness direction is substantially horizontal. The joining pipe J is disposed in the lowermost portion of the heat exchange fins 23z of the outdoor heat exchanger 23 by penetrating the heat exchange fins 23z in the thickness direction. The hot gas bypass circuit H is arranged along the lower side of the outdoor fan 26 and the outdoor heat exchanger 23.

<1-3> Electromagnetic induction heating unit 6
FIG. 6 shows a schematic perspective view of the electromagnetic induction heating unit 6. FIG. 7 shows a cross-sectional view of the electromagnetic induction heating unit 6. FIG. 8 shows an external perspective view of the electromagnetic induction heating unit 6 with the shielding cover 75 removed.

  The electromagnetic induction heating unit 6 is disposed so as to cover the heated portion of the accumulator tube F from the outside in the radial direction, and heats the heated portion by electromagnetic induction heating. The heated portion of the accumulator tube F has a double tube structure having an inner copper tube F1 and an outer SUS tube F2. In order to position the electromagnetic induction heating unit 6 with respect to the accumulator tube F before fixing the electromagnetic induction heating unit 6 to the accumulator tube F, a binding 97 as shown in FIG. 11 is used. Thereby, the fixing work mentioned later can be performed while the position of the electromagnetic induction heating unit 6 with respect to the accumulator tube F is fixed, and workability is good.

  The electromagnetic induction heating unit 6 includes a first hexagon nut 61, a second hexagon nut 66, a C-shaped ring 62, a first bobbin lid 63, a second bobbin lid 64, a bobbin main body 65, a first ferrite case 71, and a second ferrite case. 72, a third ferrite case 73, a fourth ferrite case 74, a first ferrite 98, a second ferrite 99, a coil 68, a shielding cover 75, the thermistor 14 and a fuse 15.

  The first hexagon nut 61 is made of resin, and fixes the electromagnetic induction heating unit 6 to the accumulator tube F near the upper end. The second hexagon nut 66 is made of resin, and fixes the electromagnetic induction heating unit 6 to the accumulation tube F near the lower end.

  The C-shaped ring 62 is made of resin, and is fixed in surface contact with the accumulator tube F in cooperation with the first hexagon nut 61 and the first bobbin lid 63. Although not shown, the second hexagon nut 66 and the second bobbin lid 64 are fixed in surface contact with the accumulator tube F in cooperation with the second hexagon nut 66 and the second bobbin lid 64.

  The first bobbin lid 63 is made of resin and is one member for determining the relative position between the accumulator tube F and the coil 68 in the electromagnetic induction heating unit 6. The accumulator tube F is disposed above the electromagnetic induction heating unit 6. Cover from the surroundings. The second bobbin lid 64 is made of resin and has the same shape as the first bobbin lid 63, and covers the accumulator tube F from the periphery below the electromagnetic induction heating unit 6. FIG. 13 shows a top view of the first bobbin lid 63. FIG. 14 shows a bottom view of the first bobbin lid 63. The first bobbin lid 63 is connected to the first hexagon nut 61 and the C-shaped ring 62 while penetrating the accumulator tube F, and a tubular portion 63c for piping for fixing the accumulator tube F and the electromagnetic induction heating unit 6 to each other. have. The first bobbin lid 63 has a substantially T-shaped hook-shaped portion 63a formed inwardly from the outer peripheral portion in order to hold the coil first portion 68b and the coil second portion 68c while passing therethrough. Yes. The first bobbin lid 63 has a plurality of heat radiation openings 65b penetrating in the vertical direction in order to release heat accumulated between the bobbin main body 65 and the SUS tube F2 to the outside. The first bobbin lid 63 has four screw holes 63 d for screws 69 for screwing the first to fourth ferrite cases 71 to 74 through the screws 69. Further, the first bobbin lid 63 has a fuse insertion opening 63e and a thermistor insertion opening 63f. This fuse insertion opening 63d is an opening when the fuse 15 shown in FIG. 16 is attached, and is an opening having a shape along the outer edge shape when the fuse 15 is inserted. The thermistor insertion opening 63f is an opening for attaching the thermistor 14 shown in FIG. 15, and is an opening along the outer edge shape of the thermistor 14 as viewed in the insertion direction. Since the thermistor 14 and the fuse 15 are attached from below the electromagnetic induction heating unit 6, the thermistor insertion opening 63f and the fuse insertion opening 63d of the first bobbin lid 63 exhibit the same heat radiation function as the heat radiation opening 63b. become. Here, since warm air to be radiated accumulates in the upper space in the bobbin main body 65, it is possible to efficiently radiate heat by providing more upper radiating openings than below. The thermistor 14 is inserted into the thermistor insertion opening 63f of the second bobbin lid 64, and the fuse 15 is inserted into the fuse insertion opening 63d of the second bobbin lid 64 and attached thereto. As shown in FIG. 14, on the lower surface side of the first bobbin lid 63, a bobbin cylinder upper portion 65 g that fits the bobbin main body 65 by being positioned inside an upper end cylindrical portion (described later) of the bobbin main body 65 is downward. It extends. The bobbin cylinder upper portion 65g extends from the portion along the outer edge of each opening in the penetrating direction so as not to close the penetrating state of the heat radiation opening 63b, the screw hole 63d, the fuse insertion opening 63e, and the thermistor insertion opening 63f. It is formed to extend. Note that the opening and shape of the first bobbin lid 63 are the same for the second bobbin lid 64, and each member number of the 63rd series in the first bobbin lid 63 is the same as that of the 64th series in the second bobbin lid 64. It shows corresponding to each member number, and the description is omitted.

  As shown in FIG. 9, the bobbin main body 65 is wound with a coil 68. As shown in FIG. 10, the bobbin main body 65 has a cylindrical portion 65a having a cylindrical shape. The bobbin main body 65 has a first anti-winding portion 65s formed to protrude in the radial direction at a portion slightly lowered from the upper end, and a second anti-winding portion formed to protrude in the radial direction at a portion slightly raised from the lower end. 65t. An upper end cylindrical portion 65x extends above the first winding stop portion 65s. A lower end cylindrical portion 65y extends below the second winding stop portion 65t. The first winding stop portion 65s has a first coil holding portion 65b that further protrudes radially outward. The first coil holding portion 65b is formed to be recessed inward in the radial direction so as to sandwich the coil second portion 68c, and the coil holding groove 65c formed to be recessed inward in the radial direction so as to sandwich the coil first portion 68b. Coil holding groove 65d. Similar to the first winding stopper 65s, the second winding stopper 65t has a second coil holder 65e formed with coil holding grooves 65f and 65g. As shown in the bottom view of the electromagnetic induction heating unit 6 in FIG. 12, the coil holding grooves 65f and 65g formed in the bobbin main body 65 are hooked to the second bobbin lid 64 when viewed from the direction in which the accumulator tube F extends. Since the outer side is covered with the shape portion 64a, the coil first portion 68b and the coil second portion 68c can be held more reliably. Further, since the coil holding grooves 65f and 65g and the hook-shaped portion 64a are arranged so as to be shifted in the direction in which the accumulator tube F extends, the coil holding portion 65b and the coil second portion 68c are extended in the extending direction. Since it can hold | maintain in multiple places, it can be made hard to produce a local load with respect to the coil 68. FIG. In the bobbin main body 65, a space is formed between the accumulator tube F on the inner side of the accumulator tube F side, and the magnetic flux generated when current flows through the coil 68 is more efficiently used. The distance is taken to pass through F2.

  The first ferrite case 71 sandwiches the first bobbin lid 63 and the second bobbin lid 64 from the direction in which the accumulator tube F extends. The first ferrite case 71 has a portion for accommodating a first ferrite 98 and a second ferrite 99 described later. The second ferrite case 72, the third ferrite case 73, and the fourth ferrite case 74 are also the same as the first ferrite case 71, and these include the bobbin body 65, the first bobbin lid 63, and the second bobbin lid 64. It arrange | positions in the position which covers from the outer four directions. As shown in FIGS. 6, 8, and 12, the first bobbin lid 63 is screwed and fixed to the first to fourth ferrite cases 71 to 74 via metal screws 69.

  The first ferrite 98 is made of ferrite, which is a material with high magnetic permeability, and collects magnetic flux generated in portions other than the SUS tube F2 when a current is passed through the coil 68 to form a path for the magnetic flux. In particular, the first ferrite 98 is accommodated in the accommodating portions of the first to fourth ferrite cases 71 to 74 near the upper end and the lower end of the electromagnetic induction heating unit 6. The second ferrite 99 is also the same as the first ferrite 98 except for the arrangement position and shape, and is arranged at a position near the outside of the bobbin main body 65 in the accommodating portion of the first to fourth ferrite cases 71 to 74. . Here, when the first ferrite 98 and the second ferrite 99 are not provided, for example, as shown in FIG. 17, the magnetic flux leaks out to the surroundings. On the other hand, in the electromagnetic induction heating unit 6 of this embodiment, since the first ferrite 98 and the second ferrite 99 are provided outside the coil 68, magnetic flux flows as shown in FIG. Can be reduced.

  The coil 68 has a coil winding portion 68a wound spirally around the direction in which the accumulator tube F extends outside the bobbin main body 65, and a coil second portion extending to one end side of the coil 68 with respect to the coil winding portion 68a. 1 part 68b and the coil 2nd part 68c extended to the other end side opposite to the one end side of the coil 68 are provided. The coil 68 is located inside the first to fourth ferrite cases 71 to 74. The coil first portion 68b and the coil second portion 68c are connected to the control printed board 18 as shown in FIG. The coil 68 is supplied with a high-frequency current from the control printed board 18. The control printed circuit board 18 is controlled by the control unit 11. When the supply of the high frequency current is received, the coil winding portion 68a generates a magnetic flux. Specifically, as shown by a dotted line in FIG. 18, the nearest part from the coil winding part 68a of the SUS tube F2, and the nearest part from the coil winding part 68a of the first ferrite 98, the second ferrite 99 and the shielding cover 75. Then, a magnetic flux is generated so as to have a substantially elliptical shape on a surface that is radially with respect to the accumulator tube F and extends in the axial direction. Due to the magnetic flux thus generated, the SUS tube F2 generates a current (eddy current) by electromagnetic induction. Here, when a current flows through the SUS tube F2, heat is generated in a portion that becomes an electric resistance. Here, as a material of the coil 68, a copper wire which is a good conductor is used from the viewpoint of efficiently generating a magnetic flux. The material of the coil 68 is not particularly limited as long as electricity can flow.

  As can be seen by comparing FIG. 6 and FIG. 8, the shielding cover 75 is disposed on the outermost peripheral portion of the electromagnetic induction heating unit 6 and collects magnetic flux that cannot be drawn by the first ferrite 98 and the second ferrite 99 alone. As shown in FIG. 6, the shielding cover 75 is fixed to the first ferrite case 71 by being screwed through screws 70a, 70b, 70c, and 70d. Thereby, in the electromagnetic induction heating unit 6, almost no leakage magnetic flux is generated outside the shielding cover 75, and the location where the magnetic flux is generated can be determined.

  As shown in FIG. 15, the thermistor 14 is attached so as to be in direct contact with the outer surface of the accumulator tube F, and has a thermistor detector 14a, an outer protrusion 14b, a side protrusion 14c, and a thermistor wiring 14d. The thermistor detection unit 14a has a shape that follows the curved shape of the outer surface of the accumulator tube F, and has a substantial contact area. The outer protrusion 14 b is a protrusion that protrudes in a direction away from the accumulator tube F in the attached state of the thermistor 14, and has a shape along the edge of the thermistor insertion opening 63 f of the second bobbin lid 64. Similarly to the outer protrusion 14b, the side protrusion 14c has a shape along the edge of the thermistor insertion opening 63f of the second bobbin lid 64 and extends away from the outer protrusion 14b. The thermistor wiring 14d transmits the detection result of the thermistor detection unit 14a as a signal to the control unit 11. The thermistor 14 is inserted upward in FIG. 15, but has an outer protrusion 14b and a side protrusion 14c, and thus has an asymmetric shape as viewed from the insertion direction, like the thermistor insertion opening 63f. Yes. For this reason, it is possible to prevent mistakes in the mounting work of the thermistor 14, and the mounting workability is improved.

  As shown in FIG. 16, the fuse 15 is attached so as to be in direct contact with the outer surface of the accumulator tube F, and has a fuse detector 15a, an asymmetric shape 15b, and a fuse wiring 15d. The fuse detector 15a has a concave shape that is curved so as to follow the curved shape of the outer surface of the accumulator tube F, and has a substantial contact area. Similar to the thermistor 14 described above, the asymmetric shape 15b is inserted upward in FIG. 16, but is asymmetric when viewed from the insertion direction, like the fuse insertion opening 63d. For this reason, it is possible to prevent mistakes in the mounting operation of the fuse 15, and the mounting workability is improved.

<1-4> Drainage Fixing Structure FIG. 19 shows an exploded perspective view of main components for fixing the electromagnetic induction heating unit 6 to the accumulator tube F.

  The electromagnetic induction heating unit 6 is fixed to the accumulator tube F at two locations inside the first hex nut 61 and inside the second hex nut 66. The fixing by the inner side of the second hex nut 66 is the same as the fixing by the inner side of the first hex nut 61. Therefore, the fixing by the first hex nut 61 will be mainly described below. Description is omitted. The same applies to the description of other embodiments. The drainage fixing structure described below is exemplified by the drainage fixing structure for the accumulator pipe F, but is not limited to this, and can be applied to other parts of the refrigerant piping.

  The upper part of the electromagnetic induction heating unit 6 is fixed to the accumulator tube F mainly by the cooperation of the first hexagonal nut 61, the C-shaped ring 62 and the first bobbin lid 63. Hereinafter, the first hexagon nut 61, the C-shaped ring 62, and the first bobbin lid 63 will be described in detail.

(First hexagon nut 61)
FIG. 20 shows a plan view of the first hexagon nut 61. FIG. 21 is a cross-sectional view of the first hexagon nut 61 taken along the line AA in FIG.

  The first hexagon nut 61 is configured to have a hexagonal outer periphery, and a substantially cylindrical penetrating portion is formed on the inner side. The water guiding inclined portion 61a, the upper flat surface portion 61b, the upper outer edge inclined portion 61c, It has a side surface portion 61d, a lower outer edge inclined portion 61e, a lower flat surface portion 61f, an inner protrusion 61g, an inner pressing portion 61h, and a screw groove portion 61j. The water guide inclined portion 61a is formed so as to be inclined downward toward the radially inner side in the vicinity of the upper end of the inner substantially cylindrical penetrating portion. Condensation water generated on the outer surface of the accumulator tube F and thaw water generated by thawing ice formed on the outer surface of the accumulator tube F are inclined to the inside of the water guide inclined portion 61f by the first hexagon nut 61 Water can be guided inward. The upper plane portion 61b is a plane extending in the radial direction from the outside of the water guide inclined portion 61a. The upper outer edge inclined portion 61c is formed to be inclined so as to be positioned downward from the outer surface of the upper surface flat portion 61c toward the radially outer side. Thereby, the water which was not guide | induced to the inner side of the 1st hexagon nut 61 by the water guide inclination part 61a is sent to the outer side of the 1st hexagon nut 61 by this upper outer edge inclination part 61c. The side surface portion 61d has a surface spreading in the vertical direction. The lower outer edge inclined portion 61e allows the dew condensation water and defrost water flowing from above to flow down to the heat radiation opening 63b of the first bobbin lid 63 below. The lower flat surface portion 61 f is a horizontal surface that forms the lower surface of the first hexagon nut 61. The outer protrusion 61g is a portion protruding inward of the first hex nut 61 and is the portion of the first hex nut 61 that is closest to the outer surface of the accumulator tube F. The inner pressing portion 61h allows the C-shaped ring 62 to be placed on the accumulator tube F side in a state where the electromagnetic induction heating unit 6 is fixed to the accumulator tube F and can be drained (hereinafter simply referred to as “drainage fixing state”). It is the part to press. The thread groove portion 61j is screwed with a thread groove portion 63p provided outside the pipe cylinder upper portion 63c of the first bobbin lid 63.

  Here, the radial thickness of the outer protrusion 61g and the side surface 61d of the first hexagon nut 61 is 5 mm or more. Thus, when the width | variety of the 1st hexagon nut 61 is 5 mm or more, there exists a possibility that it may become ice with water remaining there, and the ice may grow further. However, as described above, since the water can be drained to the radially outer side while draining to the radially inner side of the first hexagon nut 61, the reliability of the device can be improved.

(C-shaped ring 62)
FIG. 22 shows a plan view of the C-shaped ring 62. FIG. 23 shows a side view of the C-shaped ring 62. FIG. 24 shows a cross-sectional view of the C-shaped ring 62.

  The C-shaped ring 62 has a shape in which a circular member is not connected between the one end portion 62a and the multi-end portion 62b, a space is present, and a part of the ring is omitted. The angle formed by connecting the one end 62a, the center of the C-shaped ring 62, and the multi-end 62b is 45 degrees. The C-shaped ring 62 has an inner diameter of 22.3 mm.

  The C-shaped ring 62 includes an outer flat surface portion 62j, an outer nut pressing portion 62h, an outer lid pressing portion 62k, and an inner pipe pressing portion 62m.

  The outer flat surface portion 62j faces the first hexagon nut 61 side in the drainage fixed state, and the flat surface extends in the vertical direction.

  The outer nut pressing portion 62h is in a state of being pressed against and in contact with the inner pressing portion 61h of the first hexagonal nut 61 in the drainage fixed state, and receives the downward vertical force from the inner pressing portion 61h, so that the C-shaped ring 62 itself The outer surface of the accumulator pipe F and the inner pipe pressing portion 62m are pressed against each other so that the inner diameter of the accumulator pipe F is reduced.

  Similar to the outer nut pressing portion 62h, the outer lid pressing portion 62k is in a state of being pressed against and in contact with an inner pressing portion 63k of the first bobbin lid 63 described later, and receives a vertically upward force from the inner pressing portion 63k. Then, the C-shaped ring 62 is elastically deformed so that the inner diameter of the C-shaped ring 62 itself is reduced, so that the outer surface of the accumulator tube F and the inner pipe pressing portion 62m are pressed against each other.

  The C-shaped ring 62 has a radial thickness of 2 mm. The thickness in the vertical direction is 1 mm for the outer flat surface portion 62j and 3.5 mm for the inner pipe pressing portion 62m. The angle formed by the outer nut pressing portion 62h and the outer lid pressing portion 62k is 90 degrees. Thereby, the inner pipe pressing portion 62m of the C-shaped ring 62 has a contact surface with a vertical width of 3.5 mm along the outer surface of the accumulator pipe F.

(First bobbin lid 63)
The first bobbin lid 63 is a resin member that is fixed to the bobbin body 65 by the first to fourth ferrite cases 71 to 74 while being screwed to the first hexagon nut 61.

  The first bobbin lid 63 includes a tubular tubular portion 63c, a bobbin tubular portion 65g, a lid surface portion 63q, a thread groove portion 63p, an upper flat surface portion 63m, an inner pressing portion 63k, and an inner side surface portion 63n.

  As described above, the tubular portion 63c for piping is formed so that the inner diameter is slightly larger than the outer diameter of the accumulator tube F in order to fix the electromagnetic induction heating unit 6 along the direction in which the accumulator tube F extends. It has a cylindrical shape.

  The bobbin tubular portion 65 g is formed so that the outer diameter is slightly smaller than the inner diameter of the bobbin main body 65 in order to fit the bobbin main body 65. The bobbin tubular portion 65g extends from the position covering the edges of the heat radiation opening 63b, the screw hole 63d, the fuse insertion opening 63e, and the thermistor insertion opening 63f described above toward the through direction of these openings.

  The lid surface portion 63q covers a portion of the upper portion of the bobbin main body 65 excluding each opening portion with the first bobbin lid 63 attached to the bobbin main body 65.

  The screw groove portion 63p is a screw groove formed so as to be screwed with the screw groove portion 61j of the first hexagon nut 61 as described above.

  The upper flat portion 63m is a tip portion of the pipe tubular portion 63c in the direction in which the accumulator tube F extends, and has a planar shape having a surface substantially perpendicular to the direction in which the accumulator tube F extends. .

  The inner pressing portion 63k is an inclined portion formed to be inclined so as to be located radially inward as it goes downward from the distal end portion in the direction in which the accumulator tube F extends inside the tubular portion 63c for piping. is there. As described above, the inner pressing portion 63k is in a state of being pressed against and in contact with the outer lid pressing portion 62k in the fixed state.

  The inner side surface portion 63n is arranged at a position facing the outer peripheral surface of the accumulator tube F in the tubular portion 63c for piping in a fixed state, and surrounds the accumulator tube F from the outside.

(Fixing action)
In FIG. 27, the positional relationship in the cross-sectional shape of the 1st hexagon nut 61, the C-shaped ring 62, and the 1st bobbin cover 63 just before a fixed state is shown. FIG. 28 shows the drainage fixed state.

  As shown in FIG. 27, when the first hexagon nut 61 is screwed into the first bobbin lid 63, the inner pressing portion 61h of the first hexagon nut 61, the inner pressing portion 63k of the first bobbin lid 63, The distance in the vertical direction becomes shorter. When the first hexagon nut 61 is further screwed into the first bobbin lid 63, the outer nut pressing portion 62h of the C-shaped ring 62 is pressed against and in contact with the inner pressing portion 61h of the first hexagon nut 61. The outer lid pressing portion 62k of the mold ring 62 is in a state of being pressed against and in contact with the inner pressing portion 63k of the first bobbin lid 63. When the first hexagon nut 61 is further screwed into the first bobbin lid 63 from this state, the outer nut pressing portion 62h of the C-shaped ring 62 is pressed against and in contact with the inner pressing portion 61h of the first hexagon nut 61. The outer lid pressing portion 62k of the C-shaped ring 62 is slid with each other while keeping the pressed state against the inner pressing portion 63k of the first bobbin lid 63. 62 itself is pushed out radially inward. As a result, the inner pipe pressing portion 62m of the C-shaped ring 62 is pressed against and in contact with the outer surface of the accumulator tube F. Subsequently, by screwing the first hexagon nut 61 into the first bobbin lid 63, the C-shaped ring 62 itself is pushed further radially inward, and the C-shaped ring is pushed against the outer surface of the accumulator tube F. The inner pipe pressing portion 62m of 62 is wound around and fixed.

  In this drainage fixing state, the outer surface of the accumulator pipe F and the thread groove 61j of the first hexagon nut 61 in the portion where the inner pipe pressing portion 62m of the C-shaped ring 62 is missing are 1 mm or more in the radial direction. There is a gap. In this way, when there is a gap of 1 mm or more, condensed water and thawed water tend to stay, but since the drainage structure is secured here, such water staying can be prevented. is made of.

<Characteristics of the air conditioner 1 of the present embodiment>
In the fixing structure by the combination of the nut 961, the ring 962, and the lid 963 as shown in FIGS. 29 and 30, an inclination for guiding water to the inner side which is the piping side of the nut 961 is not formed. For this reason, as shown in FIG. 29, water W such as condensed water or defrosted water stays on the upper surface of the nut 961 and may freeze as the temperature decreases. Furthermore, there is a possibility that the ice frozen in this way will further grow. In addition, as shown in FIG. 30, when water W such as condensed water or defrosted water remains between the nut 961 and the lid 963 and freezes as the temperature decreases, the water changes to ice. The increase in volume that occurs during the phase change may cause damage such as cracks in the nut 961 and the lid 963.

  On the other hand, in the air conditioning apparatus 1 of this embodiment mentioned above, as shown in FIG. 31, the 1st hexagon nut 61 is formed with the water guide formed so as to incline downward toward the accumulation pipe F side. Since the inclined portion 61a is provided, the water W such as condensed water and frozen water on the first hexagon nut 61 passes between the first hexagon nut 61 and the accumulator pipe F along the inclined surface of the water guide inclined portion 61a. It is washed away. The condensed water and defrosted water that have reached the C-shaped ring 62 are transmitted along the circumferential direction of the C-shaped ring 62 due to surface tension. Thereby, as shown in FIG. 32, the dew condensation water and the defrost water reach the space 62 s of the missing portion of the C-shaped ring 62, and the outer surface of the accumulator tube F and the inner pressing portion of the first hexagon nut 61. It passes through a space surrounded by 61h and the inner pressing portion 63k of the first bobbin lid 63 and is guided further downward. Then, the dew condensation water and the thawed water pass between the accumulator tube F and the inner side surface portion 63 n of the first bobbin lid 63 and are guided to the space inside the bobbin main body 65.

  Further, the second hexagon nut 66 fixed on the lower side of the electromagnetic induction heating unit 6 also has the C-shaped ring 62 and the second bobbin lid 64 in the same manner as the upper portion fixed by the first hexagon nut 61 described above. Is fixed to the accumulator tube F. The fixing structure on the lower side is the same as the fixing structure on the upper side, and is generated in the bobbin main body 65 through the condensed water or the defrosted water flowing into the bobbin main body 65 through the missing portion of the C-shaped ring 62. The dew condensation water and thawing water are drained below the electromagnetic induction heating unit 6.

  Thereby, it is possible to solve the problem of the difficulty of draining condensed water and defrosted water that may be caused by fixing the electromagnetic induction heating unit 6 to the accumulator tube F.

  In addition, the dew condensation water and the defrost water that have flowed to the outside in the radial direction of the first hexagon nut 61 can be drained through the heat radiation opening 63b of the first bobbin lid 63 and the like.

  In addition, the first hexagon nut 61 and the second hexagon nut 66 are rotated and screwed into the bobbin main body 65 while the fixing position is determined by the beading 97, and the inner pipe pressing portion 62m of the C-shaped ring 62 is Since a wide contact surface with the outer surface of the accumulator tube F can be secured, the electromagnetic induction heating unit 6 itself can be firmly fixed to the accumulator tube F, and can be attached and fixed by an easy operation. .

<Other embodiments>
As mentioned above, although embodiment of this invention was described based on drawing, a specific structure is not restricted to these embodiment, It can change in the range which does not deviate from the summary of invention.

  In the following description, when the same member as that of the above embodiment can be adopted, the same member name as that of the above embodiment, the same member number, or the member number increased by a hundred number unit is used for explanation. Omitted.

(A)
In the above embodiment, the drainage fixing state between the electromagnetic induction heating unit 6 and the accumulator tube F is taken as an example in the case where the first hexagon nut 61, the C-shaped ring 62, and the first bobbin lid 63 are realized in cooperation. I gave it as an explanation.

  However, the present invention is not limited to this.

  As shown in FIG. 33, for example, the drainage fixing structure may be realized by the action of the first hex nut 161, the C-shaped cylinder 162, and the first bobbin lid 163.

  Here, the 1st hexagon nut 161 is formed so that an inner diameter may become small as it goes upwards. The piping tubular portion 163c of the first bobbin lid 163 is also formed so that the outer diameter decreases toward the top. The C-shaped cylinder 162 has a substantially cylindrical shape obtained by extending the C-shaped ring 62 in the above embodiment in the axial direction. The C-shaped cylinder 162 has a missing portion space 162s extending in the axial direction with a part in the circumferential direction missing. The C-shaped cylinder 162 has a first inner hexagonal nut 161 screwed into the first bobbin lid 163 so that the inner diameter of the first hexagonal nut 161 increases toward the upper side of the first hexagonal nut 161. Since the outer diameter of the bobbin lid 163 is formed so that the outer diameter decreases toward the upper side of the pipe tubular portion 163c, the pipe tubular portion 163c of the first bobbin lid 163 is radially inward. Elastically deforms toward Then, as shown in the cross-sectional view of FIG. 34, the inner side surface of the tubular portion 163c that is elastically deformed toward the radially inner side is in contact with the outer peripheral surface of the C-shaped cylinder 162, The C-shaped cylinder 162 is elastically deformed radially inward. Thus, the electromagnetic induction heating unit 6 and the accumulator tube F are fixed in a state where the inner surface of the C-shaped cylinder 162 is in contact with the outer surface of the accumulator tube F. Even in this state, as shown in the cross-sectional view of FIG. 35, the C-shaped cylinder 162 has a space 162s in the missing portion between the first hexagon nut 161 and the first bobbin lid 163 and the accumulator tube F. Since it is provided continuously from the upper end to the lower end, it has a drainage function similar to that of the above embodiment and can be in a drainage fixed state.

  Note that, for example, only one C-shaped cylinder 162 may be provided, or a plurality of C-type cylinders 162 may be provided so as to overlap each other in the radial direction. By providing the C-shaped cylinder 162, the size and shape of the C-shaped cylinder 162 that matches the distance between the outside of the accumulator tube F and the inside of the first hexagon nut 161 and the first bobbin lid 163 can be selected. A more rigid fixing structure can be employed by selecting a C-shaped cylinder 162 having an appropriate size and shape while increasing the degree of freedom in design.

(B)
As shown in FIG. 36, for example, the drainage fixing structure may be realized by the action of the first hexagon nut 261 and the first bobbin lid 263.

  Here, the 1st hexagon nut 261 is formed so that an inner diameter may become small as it goes upwards. The piping tubular portion 263c of the first bobbin lid 263 is also formed so that the outer diameter becomes smaller as it goes upward. The first bobbin lid 263 has a drain groove 263v inside the piping tubular portion 263c. The drain groove 263v is formed with a groove cut outward in the radial direction, and the groove is connected in the axial direction. As a result, as shown in the cross-sectional view of FIG. 37, when the first hex nut 261 is screwed into the first bobbin lid 263, the inner diameter becomes smaller toward the upper side of the first hex nut 261. The shape of the first bobbin lid 263 and the shape of the outer diameter of the first bobbin lid 263 that increases toward the upper side of the pipe tubular portion 263c. It is elastically deformed toward the inner side in the direction, and is fixed in a state where it is in contact with the outer periphery of the accumulator tube F. Even in this fixed state, as shown in the cross-sectional view of FIG. 38, the drainage groove 263v is not in contact with the outer surface of the accumulator tube F, and a gap 262s is formed between the outer surface of the accumulator tube F. ing. Even in the state where the electromagnetic induction heating unit 6 is fixed as described above, the dew condensation water and the defrost water pass through this gap and are drained. In this way, the drainage can be fixed.

(C)
As shown in FIG. 39, for example, a drainage fixing structure is obtained by interposing a cylindrical elastic member 362 between the inside of the tubular portion 363c for piping of the first bobbin lid 363 and the outer surface of the accumulator tube F. It may be realized.

  Here, the 1st hexagon nut 361 is formed so that an inner diameter may become small as it goes upwards. The piping tubular portion 363c of the first bobbin lid 363 is also formed so that the outer diameter becomes smaller as it goes upward. The cylindrical elastic member 362 has a cylindrical shape made of an elastic body such as rubber, for example. As shown in FIG. 40, when the first hexagon nut 361 is screwed into the first bobbin lid 363, a shape in which the inner diameter is formed smaller toward the upper side of the first hexagon nut 361, Since the outer diameter of the one-bobbin lid 363 is formed so that the outer diameter becomes smaller toward the upper side of the tubular portion 363c for piping, the inner side of the upper portion 363c for piping is elastic toward the inner side in the radial direction. By deforming, the outer surface of the cylindrical elastic member 362 is pushed radially inward. Thus, the cylindrical elastic member 362 is sandwiched and fixed between the inside of the pipe cylinder upper portion 363c and the outside of the accumulator pipe F in an elastically deformed state. Even in this fixed state, as shown in FIG. 41, the drainage groove 363v is not in contact with the outer surface of the accumulator tube F, and a gap 362s is formed between the outer surface of the accumulator tube F. Even in the state where the electromagnetic induction heating unit 6 is fixed as described above, the dew condensation water and the defrost water pass through this gap and are drained. In this way, the drainage can be fixed.

  Note that the number of members interposed between the first hexagon nut 361 and the first bobbin lid 363 and the accumulator tube F, such as the cylindrical elastic member 362, is not limited to one, and a plurality of members are stacked in layers. It may be provided overlapping.

(D)
As shown in FIGS. 42 and 43, for example, the first hexagon nut 461 and the cylindrical elastic member 469 having the same shape as the cylindrical elastic member 362 of the other embodiment (C) and the C-shaped ring 462 are used. The drainage fixing state may be realized by cooperating with the first bobbin lid 463.

  Here, the C-shaped ring 462 has a missing portion space 462s in which a part in the circumferential direction is missing. When the cylindrical elastic member 469 and the C-shaped ring 462 are used in combination, for example, as shown in FIG. 43, the outer side of the cylindrical elastic member 469 and the inner pipe pressing portion 462m of the C-shaped ring 462 are pressed against each other. It will be in contact. 44, when the first hexagon nut 461 is screwed into the first bobbin lid 463, the cylindrical elastic member 469 is directed from the radially outer side to the inner side by the C-shaped ring 462, as shown in the sectional view of FIG. It is pushed and fixed. Even in such a fixed state, as shown in FIG. 45, at the missing portion of the C-shaped ring 462, the outer surface of the cylindrical elastic member 462, the inner pressing portion 461h of the first hexagon nut 461, and the first bobbin lid 463. A gap 462s is formed in a portion surrounded by the inner pressing portion 463k, and condensed water, defrosted water, and the like can be drained. In this way, the drainage can be fixed.

(E)
As shown in FIG. 46, for example, the drainage fixing structure may be realized by an accumulator tube 200F having a periphery constituted by a drainage groove Fv and a contact surface Fs.

  Here, the accumulator pipe 200F is formed so that drainage grooves Fv, which are grooves recessed from the radially outer side to the inner side, are continuous in the axial direction at a plurality of locations. Further, a contact surface Fs as a surface to which the electromagnetic induction heating unit 6 is fixed is provided between the drain grooves Fv.

  Here, the first hexagon nut 261 and the first bobbin lid 263 can be the same as those in the other embodiment (B).

  As shown in FIG. 48, when the first hex nut 261 is screwed into the first bobbin lid 263, a shape in which the inner diameter is formed smaller toward the upper side of the first hex nut 261, Since the outer diameter of the one-bobbin lid 263 is formed such that the outer diameter becomes smaller toward the upper side of the tubular portion 263c for piping, the inner side of the upper portion 263c for piping is elastic toward the inner side in the radial direction. It is deformed and fixed in contact with the contact surface Fs on the outer periphery of the accumulator tube F. Even in this fixed state, as shown in the cross-sectional view of FIG. 48, the drainage groove Fv portion is not in contact with the inner surface of the tubular portion 263c for piping of the first bobbin lid 263, and the accumulator tube F A gap Fvs is formed between the outer surface.

  Thus, even if the electromagnetic induction heating unit 6 is fixed to the accumulator tube 200F, the water can be drained through the gap Fvs at the drainage groove Fv. In this way, the drainage can be fixed.

(F)
As shown in FIG. 49, for example, the drainage fixing structure may be realized by the action of the first hexagon nut 561, the spacer 562, and the first bobbin lid 563.

  Here, the 1st hexagon nut 561 is formed so that an inner diameter may become small as it goes upwards. The piping tubular portion 563c of the first bobbin lid 563 is also formed so that the outer diameter becomes smaller as it goes upward. The spacer 562 is a rod-like member having a diameter smaller than that of the accumulator tube F. As shown in FIG. 50, fixing is performed between the outer surface of the accumulator tube F and the inside of the first hexagon nut 561. That is, as shown in the cross-sectional view of FIG. 51, when the first hex nut 561 is screwed into the first bobbin lid 563, the inner diameter becomes smaller toward the upper side of the first hex nut 561. And a shape in which the outer diameter becomes smaller toward the upper side of the pipe tubular portion 563c of the first bobbin lid 563, and therefore, a spacer is formed on the inner side of the pipe upper portion 563c. The vicinity of the portion in contact with 562 is elastically deformed toward the radially outer side, and the portion other than the portion in contact with the spacer 562 is elastically deformed toward the radially inner side of the inside of the pipe upper portion 563c. Thus, the spacer 562 can be fixed while being pressed against the outer peripheral surface of the accumulator tube F. Even in this fixed state, as shown in the sectional view of FIG. 52, the spacer 562 is surrounded by the outer surface of the accumulator tube F and the inner surface of the tubular portion 563 c for piping of the first bobbin lid 563. A gap 562s is formed. Even in the state where the electromagnetic induction heating unit 6 is fixed as described above, the dew condensation water and the defrost water pass through this gap and are drained. In this way, the drainage can be fixed.

(G)
As shown in FIG. 53, for example, the drainage fixing structure may be realized by the action of the first hexagonal nut 661, the spiral member 662, and the first bobbin lid 663.

  Here, the 1st hexagon nut 661 is formed so that an inner diameter may become small as it goes upwards. The piping tubular portion 663c of the first bobbin lid 663 is also formed so that the outer diameter becomes smaller as it goes upward. Further, the spiral member 662 can be captured as a member in which the missing portion in the above-described C-shaped cylinder 162 is spirally connected. Therefore, a drainage fixing state similar to the case where the C-shaped cylinder 162 is adopted can be taken. That is, as shown in FIG. 54, the spiral member 662 is located between the outer surface of the accumulator tube F and the inside of the pipe upper portion 663c of the first hexagon nut 561 and the first bobbin lid 663. When the first hexagon nut 661 is screwed into the first bobbin lid 663, the inner diameter of the first hexagon nut 661 increases toward the upper side of the first hexagon nut 661, and the first bobbin lid 663 has a shape. Since the outer diameter decreases toward the upper side of the pipe tubular portion 663c, the inner side of the pipe upper portion 663c near the portion in contact with the spiral member 662 has a diameter. The elastic member 66 is elastically deformed outward in the radial direction while being pressed inward in the direction, and is fixed in a state where the spiral member 662 is pressed against the outer peripheral surface of the accumulator tube F. Even in a state where the electromagnetic induction heating unit 6 is fixed as described above, the dew condensation water and the defrost water can be drained through the spiral space 662s of the spiral member 662. In this way, the drainage can be fixed.

(H)
As shown in FIGS. 55 and 56, for example, the drainage fixing structure may be realized by the action of the first hexagon nut 761 and the first bobbin lid 763.

  Here, the 1st hexagon nut 761 is formed so that an inner diameter may become small as it goes upwards. The piping tubular portion 763c of the first bobbin lid 763 is also formed so that the outer diameter becomes smaller as it goes upward. The first bobbin lid 763 has a bulging portion 763x that bulges radially inward in the vicinity of the inner upper end of the pipe upper portion 763c. The bulging portions 763x are provided at four positions apart from each other. As shown in FIG. 56, when the first hexagon nut 761 is screwed into the first bobbin lid 763, a shape in which the inner diameter is formed smaller toward the upper side of the first hexagon nut 761; Since the outer diameter of the one-bobbin lid 763 is formed such that the outer diameter becomes smaller toward the upper side of the tubular portion 763c for piping, the inner side of the upper portion 763c for piping is elastic toward the inner side in the radial direction. By deforming, the four bulging portions 763x are pressed and fixed to the outside of the accumulator tube F. Even in this fixed state, as shown in FIG. 57, there is a gap 763s between the inner upper end of the pipe cylinder upper portion 763c and the portion where the bulging portion 763x is not provided and the outer surface of the accumulator pipe F. Is formed. Even in the state where the electromagnetic induction heating unit 6 is fixed as described above, the dew condensation water and the defrost water pass through this gap and are drained. In this way, the drainage can be fixed.

(I)
In the above embodiment, the case where the electromagnetic induction heating unit 6 is attached to the accumulator tube F in the refrigerant circuit 10 has been described.

  However, the present invention is not limited to this.

  For example, other refrigerant pipes other than the accumulator pipe F may be provided. In this case, a magnetic material such as a SUS pipe F2 is provided in the refrigerant pipe portion where the electromagnetic induction heating unit 6 is provided.

(J)
In the said embodiment, the case where the accumulation pipe F was comprised as a double pipe of the copper pipe F1 and the SUS pipe F2 was mentioned and demonstrated.

  However, the present invention is not limited to this.

  As shown in FIG. 58, for example, the member to be heated F2a and the two stoppers F1a may be arranged inside the accumulator pipe F or the refrigerant pipe to be heated. Here, the member to be heated F2a is a member that contains a magnetic material and generates heat by electromagnetic induction heating in the above embodiment. The stopper F1a always allows passage of the refrigerant at two locations inside the copper tube F1, but does not allow passage of the heated member F2a. Thereby, the to-be-heated member F2a does not move even if the refrigerant flows. For this reason, the target heating position of the accumulator tube F or the like can be heated. Furthermore, since the to-be-heated member F2a and the refrigerant are in direct contact with each other, the heat transfer efficiency can be improved.

(K)
The heated member F2a described in the other embodiment (I) may be positioned with respect to the pipe without using the stopper F1a.

  As shown in FIG. 59, for example, the copper pipe F1 may be provided with two bent portions FW, and the heated member F2a may be disposed inside the copper pipe F1 between the two bent portions FW. Even if it does in this way, the movement of the to-be-heated member F2a can be suppressed, allowing a refrigerant to pass through.

(L)
In the above embodiment, the case where the coil 68 is spirally wound around the accumulator tube F has been described.

  However, the present invention is not limited to this.

  For example, as shown in FIG. 60, the coil 168 wound around the bobbin main body 165 may be arranged around the accumulator tube F without being wound around the accumulator tube F. Here, the bobbin main body 165 is disposed so that the axial direction is substantially perpendicular to the axial direction of the accumulator tube F. Further, the bobbin main body 165 and the coil 168 are arranged separately in two so as to sandwich the accumulator tube F.

  In this case, for example, as shown in FIG. 61, the first bobbin lid 163 and the second bobbin lid 164 passing through the accumulator tube F may be arranged in a state of being fitted to the bobbin main body 165. Good.

  Further, as shown in FIG. 62, the first bobbin lid 163 and the second bobbin lid 164 may be sandwiched and fixed by the first ferrite case 171 and the second ferrite case 172. In FIG. 62, the case where the two ferrite cases are arranged so as to sandwich the accumulator tube F is taken as an example, but may be arranged in four directions as in the above embodiment. Moreover, you may contain the ferrite like the said embodiment.

  Utilizing the present invention makes it difficult for water to stay even when the position is determined with respect to the refrigerant pipe, and is particularly useful in an electromagnetic induction heating unit and an air conditioner that heat the refrigerant using electromagnetic induction. .

It is a refrigerant circuit figure of the air harmony device concerning one embodiment of the present invention. It is an external appearance perspective view including the front side of an outdoor unit. It is an internal arrangement configuration perspective view of an outdoor unit. It is a perspective view which shows the positional relationship etc. of the baseplate of an outdoor unit, and an outdoor heat exchanger. It is an external appearance perspective view including the back side of an outdoor unit. It is an external appearance perspective view of an electromagnetic induction heating unit. It is a section lineblock diagram of an electromagnetic induction heating unit. It is an external appearance perspective view which shows the state which removed the shielding cover from the electromagnetic induction heating unit. It is an external appearance perspective view of the bobbin main body by which the coil was wound. It is a front view of a bobbin main body. It is a conceptual diagram which shows the electric power supply to an electromagnetic induction heating unit. It is a bottom view in the state where the shielding cover of the electromagnetic induction heating unit was removed. It is a top view which shows the part located in the outer side of a 1st bobbin cover. It is a bottom view which shows the part located inside a 1st bobbin cover. It is an external appearance perspective view of a thermistor. It is an external perspective view of a fuse. It is a figure which shows the mode of the magnetic flux produced in the state without a shielding cover. It is a figure which shows the mode of the magnetic flux produced in the state which provided the shielding cover. It is a disassembled perspective view of the main element for fixing an electromagnetic induction heating unit with respect to an accumulator pipe. It is a top view of the 1st hexagon nut. It is sectional drawing of a 1st hexagon nut. It is a top view of a C-shaped ring. It is a side view of a C-shaped ring. It is sectional drawing of a C-shaped ring. It is sectional drawing of a 1st bobbin cover. It is a schematic sectional drawing which shows a mode that a 1st hexagon nut, a C-shaped ring, a 1st bobbin lid | cover, and a bobbin main body are being fixed with respect to the accumulator pipe | tube. It is explanatory sectional drawing which shows the state immediately before an accumulator pipe | tube is clamp | tightened with a 1st hexagon nut, a C-shaped ring, and a 1st bobbin lid. It is explanatory sectional drawing which shows the state by which the accumulation pipe | tube was clamp | tightened by the 1st hexagon nut, the C-shaped ring, and the 1st bobbin cover. It is explanatory sectional drawing explaining a mode that water accumulates when the water conveyance inclined surface is not provided in the 1st hexagon nut. It is explanatory sectional drawing explaining the influence by water in case C type ring is not employ | adopted. It is explanatory sectional drawing which shows the function of a water conveyance inclined surface. It is explanatory drawing which shows a mode that water drains through the empty space of a C-shaped ring. It is an external appearance perspective view which shows the fixing structure of other embodiment (A). It is sectional drawing which shows the fixing structure of other embodiment (A). It is sectional drawing which shows the drainage structure of other embodiment (A). It is an external appearance perspective view which shows the fixing structure of other embodiment (B). It is sectional drawing which shows the fixing structure of other embodiment (B). It is sectional drawing which shows the drainage structure of other embodiment (B). It is an external appearance perspective view which shows the fixing structure of other embodiment (C). It is sectional drawing which shows the fixing structure of other embodiment (C). It is sectional drawing which shows the drainage structure of other embodiment (C). It is an external appearance perspective view which shows the fixing structure of other embodiment (D). It is an external appearance perspective view which shows the partial state of the fixing structure of other embodiment (D). It is sectional drawing which shows the fixing structure of other embodiment (D). It is sectional drawing which shows the drainage structure of other embodiment (D). It is an external appearance perspective view which shows the to-be-heated part of the accumulation tube used for the fixing structure of other embodiment (E). It is sectional drawing which shows the fixing structure of other embodiment (E). It is sectional drawing which shows the drainage structure of other embodiment (E). It is an external appearance perspective view which shows the fixing structure of other embodiment (F). It is an external appearance perspective view which shows the 1st hexagon nut employ | adopted as the fixing structure of other embodiment (F). It is sectional drawing which shows the fixing structure of other embodiment (F). It is sectional drawing which shows the drainage structure of other embodiment (F). It is an external appearance perspective view which shows the fixing structure of other embodiment (G). It is sectional drawing which shows the fixing structure of other embodiment (G). It is an external appearance perspective view which shows the partial state of the fixing structure of other embodiment (H). It is sectional drawing which shows the fixing structure of other embodiment (H). It is sectional drawing which shows the drainage structure of other embodiment (H). It is explanatory drawing of refrigerant | coolant piping of other embodiment (J). It is explanatory drawing of refrigerant | coolant piping of other embodiment (K). It is a figure which shows the example of arrangement | positioning with the coil and refrigerant | coolant piping of other embodiment (L). It is a figure which shows the example of arrangement | positioning of the bobbin lid of other embodiment (L). It is a figure which shows the example of arrangement | positioning of the ferrite case of other embodiment (L).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air conditioning apparatus 6 Electromagnetic induction heating unit 10 Refrigerant circuit 21 Compressor 22 Four-way switching valve 23 Outdoor heat exchanger 24 Electric expansion valve 25 Accumulator 41 Indoor heat exchanger 61 1st hexagon nut (positioning part, 1st fixing member)
61a Water conveyance inclined part (inclined shape)
62 C-shaped ring (positioning part, third member, part where force is acting on the refrigerant piping side)
62s Space of missing part (continuous space)
63 First bobbin lid (positioning part, second fixing member)
63b Heat dissipation opening (opening)
64 Second bobbin lid 65 Bobbin body (intermediate part)
66 Second hexagon nut 68 Coil 71 First ferrite case 72 Second ferrite case 73 Third ferrite case 74 Fourth ferrite case 75 Shielding cover 98 First ferrite 99 Second ferrite 161 First hexagon nut (positioning portion)
162 C-shaped ring (part where force is applied to the refrigerant piping side, positioning part)
163 1st bobbin lid (positioning part)
162s Missing space (continuous space)
200F accumulator pipe (refrigerant pipe)
Fs contact surface (part that receives the action of force from the positioning part)
Fvs gap (continuous space)
261 First hexagon nut (first member, positioning part)
262s gap (continuous space)
263 First bobbin lid (second member, positioning part)
361 1st hexagon nut (positioning part)
362 cylindrical elastic member (positioning part)
362s gap (continuous space)
363 1st bobbin lid (positioning part)
461 First hexagon nut (positioning part, positioning part)
462 C-shaped ring (positioning part, part where force acts on the refrigerant piping side, positioning part)
462s gap (continuous space)
463 First bobbin lid (positioning part, positioning part)
469 Cylindrical elastic member (intervening part, positioning part)
561 First hexagon nut (positioning part)
562 C-shaped ring (part where force is applied to the refrigerant piping side, positioning part)
562s gap (continuous space)
563 First bobbin lid (positioning part)
661 First hexagon nut (positioning part)
662 Spiral member (portion where force is applied to refrigerant pipe side, positioning part)
662s spiral space (continuous space)
663 First bobbin lid (positioning part)
761 1st hexagon nut (positioning part)
763 First bobbin lid (positioning part)
763x bulging part (intervening part, part where force acts on the refrigerant piping side)
763s gap (continuous space)
A discharge pipe, refrigerant pipe B indoor side gas pipe, refrigerant pipe C indoor side liquid pipe D outdoor liquid pipe E outdoor gas pipe, refrigerant pipe F accumulator pipe, refrigerant pipe G suction pipe, refrigerant pipe H hot gas bypass circuit J Supercooling circuit

Claims (20)

An electromagnetic induction heating unit (6) for heating a refrigerant pipe (F) and / or a member in thermal contact with the refrigerant flowing in the refrigerant pipe (F),
A coil (68) disposed in the vicinity of the refrigerant pipe (F);
Positioning portions (61, 62, 63, 161, 162, 163, 261, 263, 361, 362, 363, 461, 462, 463, which define the relative positional relationship between the coil (68) and the refrigerant pipe (F) 469, 561, 562, 563, 661, 662, 663, 761, 763),
With
Between the positioning part and the refrigerant pipe, from one side where the refrigerant pipe extends with respect to the positioning part to the other side opposite to the one side with respect to the positioning part , There are continuous spaces (62s, 162s, 262s, 362s, 462s, 562s, 662s, 763s, Fvs),
Electromagnetic induction heating unit (6). The coil (68) surrounds at least a part of the refrigerant pipe (F).
The electromagnetic induction heating unit (6) according to claim 1. The positioning portion defines a relative positional relationship between the coil (68) and the refrigerant pipe (F) by applying a force to the refrigerant pipe (F) side.
The electromagnetic induction heating unit (6) according to claim 1 or 2. The positioning portion is formed such that a portion where a force acts on the refrigerant pipe (F) side has a surface shape.
The electromagnetic induction heating unit (6) according to claim 3. Of the positioning portion, portions (62, 162, 462, 562, 763x) where a force is applied to the refrigerant pipe (F) side are provided so as to go around the refrigerant pipe (F) side. Not done,
Electromagnetic induction heating unit (6) according to claim 3 or 4. Of the positioning portion, the portion (662) where the force is acting on the refrigerant pipe (F) side is formed so as to be continuous,
The one end side that is the end portion of the continuous portion that is continuous and the other end side that is the end portion of the continuous portion other than the one end side are not connected,
Electromagnetic induction heating unit (6) according to claim 3 or 4. Of the refrigerant pipe (200F), the portion (Fs) that receives the action of the force from the positioning portion does not go around the refrigerant pipe (200F) side,
Electromagnetic induction heating unit (6) according to claim 3 or 4. An interposition part (763x) positioned at least at a part between the refrigerant pipe (F) and the positioning part (761, 763);
The positioning portions (761, 763) have a fixed relative position to the refrigerant pipe (F) via the interposition portion (763x),
The continuous space (763s) is
Between the interposition part (763x) and the refrigerant pipe (F), the refrigerant pipe (F) is continuously provided from one side to the other side in the extending direction.
The electromagnetic induction heating unit (6) according to any one of claims 1 to 7. An interposition part (469) located at least in part between the refrigerant pipe (F) and the positioning part (461, 462, 463);
The positioning portion (461, 462, 463) has a relative position with respect to the refrigerant pipe (F) via the interposition portion (469),
The continuous space (462s) is
Between the interposition part (469) and the positioning part (461, 462, 463), the refrigerant pipe (F) is continuously provided from one side to the other side in the extending direction.
The electromagnetic induction heating unit (6) according to any one of claims 1 to 7. The distance from the inside to the outside which is the refrigerant pipe (F) side of the continuous space is 1 mm or more,
The electromagnetic induction heating unit (6) according to any one of claims 1 to 9. The thickness from the inner side which is the refrigerant piping (F) side of the positioning portion to the outer side opposite to the inner side is 5 mm or more.
The electromagnetic induction heating unit (6) according to any one of claims 1 to 10. The positioning part has a shape that surrounds the refrigerant pipe (F) from around,
The positioning portion is an end portion on one side where the refrigerant pipe (F) extends and at least a part of an inner portion on the refrigerant pipe (F) side is closer to the inner side. Having an inclined shape (61a) toward the other side which is the opposite side,
The electromagnetic induction heating unit (6) according to any one of claims 1 to 11. The positioning part is
A first member (261) having an inner diameter larger than the outer diameter of the refrigerant pipe (F) and provided with a thread groove;
A second member (263) which can be screwed by acting on the screw groove, and defines a relative position with the refrigerant pipe (F) in the screwed state;
have,
The electromagnetic induction heating unit (6) according to any one of claims 1 to 12. The positioning portion is a third member in which a force acting on the refrigerant pipe (F) side is increased by elastically deforming as the first member (61) and the second member (63) are screwed together. (62)
Electromagnetic induction heating unit (6) according to claim 13. The positioning portion has a first fixing member (61) having an inner diameter larger than the outer diameter of the refrigerant pipe (F) and a second fixing having a larger outer edge than the outer edge of the first fixing member in the radial direction. A member (63),
The second fixing member (63) has an opening (63b) penetrating in a direction in which the refrigerant pipe (F) extends.
The electromagnetic induction heating unit (6) according to any one of claims 1 to 14. An intermediate portion (65) holding the coil (68) while further ensuring a space between the refrigerant pipe (F) and the coil (68),
When viewed from the direction in which the refrigerant pipe (F) extends, the opening (63b) of the second fixing member is located between the intermediate part (65) and the refrigerant pipe (F).
The electromagnetic induction heating unit (6) according to claim 15. The positioning portions (61, 62, 63, 64, 66) are at least two locations on one side where the refrigerant pipe (F) extends and on the other side opposite to the one side. A force is acting on the refrigerant pipe (F) side,
The electromagnetic induction heating unit (6) according to any one of claims 1 to 16. The positioning portion (61, 63) has a portion that forms a ring while making a round around the outside of the refrigerant pipe (F).
The electromagnetic induction heating unit (6) according to any one of claims 1 to 17. An air conditioner (1) comprising the electromagnetic induction heating unit (6) according to any one of claims 1 to 18,
In the installed state of the air conditioner (1), the refrigerant pipe (F) extends in a substantially vertical direction.
Air conditioner (1). Electromagnetic induction heating unit (6) according to any one of claims 1 to 18,
A refrigeration cycle (10) having a compression mechanism (21), a refrigerant cooler (41), an expansion mechanism (24), and a refrigerant heater (23), and including a portion for flowing the refrigerant through the refrigerant pipe (F); ,
An air conditioner (1) comprising:
The electromagnetic induction heating unit (6) is provided in a refrigerant pipe (F) on the suction side extending to the suction side of the compression mechanism (21).
Air conditioner (1).

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