JP2011012561A - Terminal protection cover for compressor, compressor, air conditioner, water heater, and method for manufacturing terminal protection cover for compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal protection cover for a compressor enabling incorporation of an acceleration sensor into a compressor without increasing manufacturing processes of the compressor.SOLUTION: This terminal protection cover 60 for the compressor is provided on the compressor constructing a part of a refrigeration cycle, and protects a terminal for supplying the compressor with electric power. The terminal protection cover 60 for the compressor includes a terminal protection part 63 protecting the terminal, a leg part 62 fixed on a sealed vessel 21 of the compressor, and a substrate assembly 70 including a substrate on which an acceleration sensor detecting three axis acceleration of the compressor by using piezo resistive effect is mounted, and is manufactured by integrally formed with thermoset resin in such a manner that the substrate is embedded in the terminal protection part 63.

Description

  The present invention relates to a compressor terminal protective cover for protecting a compressor terminal used in a refrigeration cycle. Specifically, the compressor terminal protective cover according to the present invention is manufactured by integrally molding a substrate mounted with electronic components for detecting acceleration with a thermosetting resin so as to be buried in the top surface of the compressor terminal protective cover. It is what is done. Furthermore, it is related with the manufacturing method of the compressor using this terminal protective cover for compressors, and the terminal protective cover for compressors.

  Conventionally, a sensor holding portion for tightly fixing the temperature sensor to the outer surface of the compressor is formed by extending from the terminal protective cover, and the sensor holding portion is substantially the same size as the outer dimension of the temperature sensor and has an opening at the bottom. And a space to open the sensor lead wire at one end of the space, and the temperature sensor is fitted into the space and temporarily fixed, and the terminal protection cover is placed on the terminal to hold the temperature sensor. A compressor terminal protective cover has been proposed (see, for example, Patent Document 1).

  In addition, a sensor holding plate for attaching the temperature sensor to the compressor shell is provided. The sensor holding plate is made of metal and includes a holding plate fixing portion, a sensor fixing portion, and a holding plate fixing piece. A terminal protection cover for a compressor that forms a positioning means for the sensor holding plate and inserts and fixes the sensor holding plate in a state where the holding plate fixing piece is positioned along the outer peripheral surface of the outer lower portion of the terminal protection cover with the positioning means as a guide. Has been proposed (see, for example, Patent Document 2).

JP 2002-188570 A JP 2002-188571 A

  The terminal protective cover for a compressor described in Patent Document 1 and Patent Document 2 includes a temperature sensor holding portion. When attaching the temperature sensor, increasing the manufacturing cost due to an increase in the manufacturing process is a problem. It was.

  In addition, when it is assumed that an accelerometer that detects the three-axis acceleration of the compressor using the piezoresistive effect is installed in the compressor in order to suppress noise caused by driving vibrations, the conventional technology does not position the accelerometer. It is difficult and the output accuracy of the acceleration sensor may be lowered, and a method for fixing the acceleration sensor to the compressor has been a problem.

  The present invention has been made in order to solve the above-described problems. The acceleration sensor for the compressor can be fixed to the compressor without increasing the number of steps, and further, the displacement of the acceleration sensor can be prevented. To provide a protective cover for the compressor terminal. Moreover, the compressor using the terminal protective cover for compressors, the air conditioner using the compressor, and a water heater are provided. Furthermore, the manufacturing method of the terminal protective cover for compressors is provided.

The compressor terminal protective cover according to the present invention is a compressor terminal protective cover that is provided in a compressor constituting a part of a refrigeration cycle and protects a terminal to which power is supplied to the compressor,
Compressor terminal protective cover
A terminal protector for protecting the terminal;
A foot fixed to a sealed container of the compressor;
A board assembly having a board on which an acceleration sensor for detecting the three-axis acceleration of the compressor using the piezoresistance effect is mounted;
The substrate is integrally molded with a thermosetting resin so as to be embedded in the terminal protection part.

  The terminal protective cover for a compressor according to the present invention is formed integrally with a thermosetting resin so that a substrate on which an acceleration sensor for detecting the triaxial acceleration of the compressor is mounted using the piezoresistive effect is embedded in the terminal protective portion. Therefore, the acceleration sensor can be assembled to the compressor or the like without increasing the number of processes.

FIG. 3 shows the first embodiment, and is a refrigerant circuit diagram of the air conditioner. FIG. 3 is a diagram illustrating the first embodiment and is an exploded perspective view of the outdoor unit 100. FIG. FIG. 3 shows the first embodiment and is a longitudinal sectional view of the compressor 1. FIG. 3 shows the first embodiment, and is an external view of the compressor 1 to which a compressor terminal protective cover 60 is attached. FIG. 5 shows the first embodiment and is a top view of the compressor terminal protective cover 60. FIG. 5 shows the first embodiment, and is a side view of the compressor terminal protective cover 60 (a part thereof is shown in cross section). FIG. 5 is a diagram showing the first embodiment, and is a bottom view of the compressor terminal protective cover 60. XX sectional drawing of FIG. The figure which shows the A section vicinity of FIG. 4, and shows the terminal protective cover 60 for compressors by the XX cross section of FIG. It is a figure shown for a comparison and the figure of FIG. 9 equivalent of the conventional one. FIG. 5 is a diagram showing the first embodiment, and is a perspective view of an upper surface of a compressor terminal protective cover 60. FIG. 5 is a diagram showing the first embodiment, and is a perspective view of the bottom surface of the compressor terminal protective cover 60 as viewed. FIG. 5 is a diagram showing the first embodiment, and is a perspective view of the substrate assembly 70 as viewed from the acceleration sensor 72 side. FIG. 5 is a diagram showing the first embodiment, and is an exploded perspective view of the substrate assembly 70 as viewed from the acceleration sensor 72 side. FIG. 5 is a diagram showing the first embodiment, and is a perspective view of the substrate assembly 70 as viewed from the opposite side of the acceleration sensor 72; FIG. 4 is a diagram showing the first embodiment, and is a perspective view of a substrate pressing component 80 as viewed from the top. FIG. 5 shows the first embodiment, and is a top view of a substrate pressing component 80. FIG. FIG. 5 shows the first embodiment, and is a side view of a substrate pressing component 80. FIG. 5 is a diagram showing the first embodiment, and is a perspective view of a substrate pressing component 80 as viewed from the bottom surface. FIG. 5 shows the first embodiment, and is a bottom view of a substrate pressing component 80. FIG. 5 shows the first embodiment, and is an enlarged perspective view of a first locking part 81; FIG. 5 shows the first embodiment, and is an enlarged perspective view of a second anchoring portion 84; FIG. 5 shows the first embodiment and is a basic configuration diagram of an acceleration sensor 72. FIG. 5 shows the first embodiment, and is an exploded view showing a state before the molding die 200 of the compressor terminal protective cover 60 is set. The figure which shows Embodiment 1 and the figure which shows the state which set the mold 200 of the terminal protective cover 60 for compressors. FIG. 5 shows the first embodiment, and shows a manufacturing process of the compressor terminal protective cover 60.

Embodiment 1 FIG.
A board on which electronic components that detect the triaxial acceleration of the compressor using the piezoresistive effect are mounted to prevent the terminals that supply power to the compressor from dust and water, and to prevent contact with conductive foreign objects. Before describing the terminal protective cover that is manufactured by integrally molding with a thermosetting resin so as to be buried in the top surface of the terminal protective cover, a refrigerant circuit (refrigeration cycle) using a compressor provided with a terminal and The outdoor unit of the air conditioner in which the compressor is installed will be described.

FIG. 1 is a diagram showing Embodiment 1 and is a refrigerant circuit diagram of an air conditioner. As shown in FIG. 1, the refrigerant circuit of the air conditioner is mainly composed of the following elements, and these elements are sequentially connected to constitute a refrigeration cycle.
(1) Compressor 1 for compressing refrigerant;
A rotary compressor is mainly used for the compressor 1 of the air conditioner (small size). In addition to the rotary compressor, a scroll compressor or the like is also used. R410A is mainly used as the refrigerant. Further, incompatible oil, ester oil, ether oil or the like is used for the lubricating oil of the compressor 1.
(2) Four-way valve 2 for switching the direction of refrigerant flow between cooling operation and heating operation;
As shown by the solid line in FIG. 1, the four-way valve 2 has a refrigerant flowing from the compressor 1 to the outdoor heat exchanger 3 and from the indoor heat exchanger 5 to the compressor 1 during the heating operation. 1, the refrigerant flows from the compressor 1 to the indoor heat exchanger 5 and from the outdoor heat exchanger 3 to the compressor 1 so that the refrigerant flows.
(3) Outdoor heat exchanger 3 that operates as a condenser during cooling operation and as an evaporator during heating operation;
(4) Depressurizer 4 (electronically controlled expansion valve) that depressurizes the high-pressure liquid refrigerant into a low-pressure gas-liquid two-phase refrigerant;
(5) The indoor heat exchanger 5 that operates as an evaporator during cooling operation and as a condenser during heating operation.

  The solid arrows in FIG. 1 indicate the direction in which the refrigerant flows during the cooling operation. Moreover, the broken line arrow of FIG. 1 shows the direction through which the refrigerant flows during the heating operation.

  The outdoor heat exchanger 3 is provided with an outdoor fan 6 (for example, an axial fan), and the indoor heat exchanger 5 is provided with an indoor fan 7 (for example, a cross flow fan).

  During the cooling operation, the high-temperature and high-pressure refrigerant compressed from the compressor 1 is discharged and flows into the outdoor heat exchanger 3 through the four-way valve 2. In this outdoor heat exchanger 3, outdoor air passes between the fins and tubes (heat transfer tubes) of the outdoor heat exchanger 3 by an outdoor fan 6 (for example, an axial fan) provided in the air passage. While exchanging heat with the refrigerant, the refrigerant is cooled to a high pressure liquid state, and the outdoor heat exchanger 3 acts as a condenser. Thereafter, the pressure is reduced through the decompression device 4, becomes a low-pressure gas-liquid two-phase refrigerant, and flows into the indoor heat exchanger 5. In the indoor heat exchanger 5, indoor air passes between the fins of the indoor heat exchanger 5 and the tubes (heat transfer tubes) by driving an indoor blower 7 (for example, a cross flow fan) attached to the air passage. By exchanging heat with the refrigerant, the air blown into the indoor space is cooled, while the refrigerant receives heat from the air and evaporates into a gaseous state (the indoor heat exchanger 5 acts as an evaporator). Is then returned to the compressor 1. The indoor space is air-conditioned (cooled) with the air cooled by the indoor heat exchanger 5.

  Further, during the heating operation, the four-way valve 2 is inverted, so that the refrigerant flows in the opposite direction to the refrigerant flow during the cooling operation in the refrigeration cycle, and the indoor heat exchanger 5 serves as a condenser to perform outdoor heat exchange. Vessel 3 acts as an evaporator. The indoor space is air-conditioned (heated) by the air heated by the indoor heat exchanger 5.

  FIG. 2 shows the first embodiment, and is an exploded perspective view of the outdoor unit 100. The structure of the outdoor unit 100 of an air conditioner will be described with reference to FIG.

As shown in FIG. 2, the outdoor unit 100 of an air conditioner is mainly configured by the following elements.
(1) A substantially L-shaped outdoor heat exchanger 3 in plan view;
(2) Bottom plate 8 (base) constituting the bottom of the casing of the outdoor unit 100;
(3) A flat top panel 9 constituting the top surface of the housing;
(4) a substantially L-shaped front panel 10 in a plan view that constitutes the front surface and one side of the housing;
(5) Side panel 11 constituting the other side of the housing;
(6) Separator 12 that separates the air passage (blower room) and the machine room;
(7) An electrical product box 13 in which electrical products are stored;
(8) Compressor 1 for compressing refrigerant;
(9) Refrigerant piping / refrigerant circuit components 14 forming a refrigerant circuit;
(10) An outdoor fan 6 that blows air to the outdoor heat exchanger 3.

  FIG. 3 shows the first embodiment, and is a longitudinal sectional view of the compressor 1. A configuration of a two-cylinder rotary compressor as an example of the compressor 1 will be described with reference to FIG. In the two-cylinder rotary compressor, an electric motor 22 including a stator 22a and a rotor 22b and a compression mechanism unit 23 driven by the electric motor 22 are housed in a sealed container 21 having a high-pressure atmosphere.

  A brushless DC motor driven by an inverter is used for the electric motor 22, and a three-phase winding is applied to the winding 22a-1 of the stator 22a. The three-phase winding may be either concentrated winding or distributed winding.

  The rotational force of the electric motor 22 is transmitted to the compression mechanism unit 23 via the crankshaft 24.

  The crankshaft 24 has a predetermined phase difference (for example, 180) between a main shaft 24a fixed to the rotor 22b of the electric motor 22, a sub shaft 24b provided on the opposite side of the main shaft 24a, and the main shaft 24a and the sub shaft 24b. A main shaft side eccentric portion 24c and a sub shaft side eccentric portion 24d, and an intermediate shaft 24e provided between the main shaft side eccentric portion 24c and the sub shaft side eccentric portion 24d. Have

  The main bearing 26 is fitted to the main shaft 24a of the crankshaft 24 with a clearance for sliding, and rotatably supports the main shaft 24a.

  The auxiliary bearing 27 is fitted to the auxiliary shaft 24b of the crankshaft 24 with a clearance for sliding, and rotatably supports the auxiliary shaft 24b.

  The compression mechanism unit 23 includes a first cylinder 28 on the main shaft 24a side and a second cylinder 29 on the sub shaft 24b side.

  The first cylinder 28 has a cylindrical inner space, and a first piston 31 a that is rotatably fitted to the main shaft side eccentric portion 24 c of the crankshaft 24 is provided in the inner space. Further, a first vane (not shown) that reciprocates according to the rotation of the main shaft side eccentric portion 24c is provided.

  A first piston 31a that is rotatably fitted to the main shaft side eccentric portion 24c of the crankshaft 24, and both axial end surfaces of the inner space of the first cylinder 28 that houses the first vane are partitioned from the main bearing 26. A compression chamber is formed by closing with the plate 30.

  The first cylinder 28 is fixed to the inner periphery of the sealed container 21.

  The second cylinder 29 also has a cylindrical inner space, and a second piston 31 b that is rotatably fitted to the countershaft side eccentric portion 24 d of the crankshaft 24 is provided in this inner space. Furthermore, a second vane (not shown) that reciprocates according to the rotation of the countershaft side eccentric portion 24d is provided.

  A second piston 31b that is rotatably fitted to the sub-shaft side eccentric portion 24d of the crankshaft 24, and both axial end surfaces of the inner space of the second cylinder 29 that houses the second vane are connected to the sub-bearing 27. A compression chamber is formed by closing with the partition plate 30.

  The compression mechanism portion 23 is bolted to the first cylinder 28 and the main bearing 26, and is bolted to the second cylinder 29 and the auxiliary bearing 27, and then the partition plate 30 is sandwiched between them, The bolts are fastened and fixed in the axial direction from the outside of the bearing 26 to the second cylinder 29 and from the outside of the auxiliary bearing 27 to the first cylinder 28.

  The bolt 32 illustrated in FIG. 3 is a part of a bolt that is fastened and fixed in the axial direction from the outside of the main bearing 26 to the second cylinder 29.

  3 is a part of a bolt that fastens the second cylinder 29 and the auxiliary bearing 27 together.

  An accumulator 40 is provided adjacent to the sealed container 21. The suction connection pipe 41 and the suction connection pipe 42 connect the first cylinder 28, the second cylinder 29, and the accumulator 40, respectively.

  The refrigerant gas compressed by the first cylinder 28 and the second cylinder 29 is discharged into the sealed container 21 and sent out from the discharge pipe 43 to the refrigeration cycle of the refrigeration air conditioner.

  Electric power is supplied to the electric motor 22 from the glass terminal 44 (terminal) via the lead wire 45. Since the electric motor 22 has three phases, the lead wires 45 are also three. Further, the number of the glass terminals 44 is also three.

  Although not shown, lubricating oil (refrigeration machine oil) that lubricates each sliding portion of the compression mechanism portion 23 is stored at the bottom portion in the sealed container 21.

  The supply of the lubricating oil to each sliding part of the compression mechanism 23 is performed by raising the lubricating oil stored at the bottom of the sealed container 21 along the inner diameter 24f of the crankshaft 24 by the centrifugal force generated by the rotation of the crankshaft 24. This is done through an oil supply hole 50 provided in the shaft 24. In the example of FIG. 3, the oil supply holes 50 are formed at four locations. From each oil supply hole 50, between the main shaft 24a and the main bearing 26, the main shaft side eccentric portion 24c and the first piston 31a, the sub shaft side eccentric portion 24d and the second piston 31b, and between the sub shaft 24b and the sub bearing 27. Lubricating oil is supplied to the sliding portion.

  The crankshaft 24 uses a material having a Young's modulus of 150 GPa or more so as to suppress bending due to a compressed gas load during operation. Further, in order to suppress vibration during operation, the main shaft side eccentric portion 24c and the sub shaft side eccentric portion 24d have substantially the same shape (same diameter and same axial length) and substantially the same amount of eccentricity. The balance of centrifugal force is maintained.

  Further, the outer side of the eccentric side of the main shaft side eccentric portion 24c is formed so as to be closer to the shaft center side than the outer peripheral surface of the main shaft 24a.

  When the anti-eccentric side outer peripheral surface of the main shaft side eccentric portion 24c is formed to be closer to the shaft center side than the outer peripheral surface of the main shaft 24a, the sub shaft side eccentric portion 24d has the same shape as the main shaft side eccentric portion 24c, When the outer diameter of the subshaft 24b is the same as the outer diameter of the main shaft 24a, the anti-eccentric outer peripheral surface of the subshaft side eccentric portion 24d is more axially centered than the outer peripheral surface of the subshaft 24b. Become side. Then, it becomes impossible to insert the first piston 31a and the second piston 31b into the auxiliary shaft side eccentric portion 24d from the auxiliary shaft 24b side. Therefore, the outer diameter of the subshaft 24b is made smaller than the outer diameter of the main shaft 24a, and the anti-eccentric side outer peripheral surface of the subshaft side eccentric portion 24d is closer to the antiaxial center side than the outer peripheral surface of the subshaft 24b. To be.

  The crankshaft 24 having such a configuration can increase the amount of eccentricity of the main shaft side eccentric portion 24c and the sub shaft side eccentric portion 24d, and can increase the displacement volume of the compression chamber. High output is possible.

  In other words, the volume of the compression chamber can be reduced to obtain the same output, and the two-cylinder rotary compressor can be reduced in size and weight.

  In addition, the compressor 1 uses a rod 46 used when the compressor 1 is hung on a hanger and transported on a hanger to perform coating (black coating) or leakage check on the compressor 1 on the compressor production line. Provide on top. As will be described later, a screw portion for fixing the compressor terminal protective cover is provided at the tip of the rod 46.

  FIG. 4 shows the first embodiment, and is an external view of the compressor 1 to which the compressor terminal protective cover 60 is attached. As shown in FIG. 4, a compressor terminal protective cover 60 that protects the glass terminal 44 is attached to the upper surface of the sealed container 21.

  As described above, the compressor 1 includes the electric motor 22 that drives the compression mechanism unit 23 that compresses the refrigerant. By supplying electric power to the electric motor 22, the electric motor 22 drives the compression mechanism unit 23 to compress the refrigerant. .

  Electric power is supplied to the motor 22 from an external power source via the glass terminal 44.

  The glass terminal 44 is made of metal and glass. The glass terminal 44 is fixed to the sealed container 21 of the compressor 1 by welding. The three terminals are insulated by glass.

  Lead wires (not shown) are connected to the three terminals of the glass terminal 44 from an external power source outside the sealed container 21. Further, a lead wire 45 is connected from the electric motor 22 inside the sealed container 21.

  Outside the sealed container 21, the conductive portion is exposed in the vicinity of the terminal of the glass terminal 44 to which the lead wire is connected from an external power source, and when it is incorporated into the outdoor unit of the air conditioner as it is, dust, water, conductive foreign matter There is a possibility that the glass terminal 44 may have poor insulation due to the above.

  Therefore, a compressor terminal protective cover for protecting the portion exposed to the outside of the glass terminal 44 from dust, water, conductive foreign matter, and the like is necessary.

  As shown in FIG. 4, the compressor terminal protective cover 60 is fixed to the compressor 1 by using a rod 46 erected on the upper surface of the sealed container 21 of the compressor 1.

  The nut 47 is fastened to the threaded portion 46 a of the rod 46 to fix the compressor terminal protective cover 60 to the rod 46.

  5 to 8 show the first embodiment, FIG. 5 is a top view of the compressor terminal protective cover 60, and FIG. 6 is a side view of the compressor terminal protective cover 60 (a part thereof is shown in cross section). 7 is a bottom view of the compressor terminal protective cover 60, and FIG. 8 is a sectional view taken along line XX of FIG.

  The compressor terminal protective cover 60 is formed by molding with a thermosetting resin such as BMC (unsaturated polyester).

  As shown in FIGS. 5 to 8, the mold part 61 includes a terminal protection part 63 and a foot part 62. The terminal protection part 63 is a part that covers the glass terminal 44 of the compressor 1 and protects the glass terminal 44 from dust, water, conductive foreign matter, and the like. Further, the compressor terminal protective cover 60 is fixed to the rod 46 of the hermetic container 21 of the compressor 1 by the feet 62.

  Although details will be described later, a board assembly 70 in which a triaxial acceleration sensor is mounted on the board is embedded in the top surface portion of the terminal protection portion 63.

  The present embodiment is characterized in that a board assembly 70 in which a triaxial acceleration sensor is mounted on a board is embedded in a compressor terminal protective cover 60.

  A screw hole 62 a to be inserted into the rod 46 of the sealed container 21 of the compressor 1 is provided on the upper surface of the foot portion 62.

  FIG. 9 is a view showing the vicinity of portion A in FIG. 4 and showing the compressor terminal protective cover 60 in the section XX in FIG. As shown in FIG. 9, the screw hole 62 a provided in the foot portion 62 of the compressor terminal protective cover 60 is passed through the rod 46, and the screw hole 62 a is passed through the stepped portion 46 b of the rod 46 (diameter than the tip portion of the rod 46. Is positioned in the axial direction and fixed at a predetermined position. The terminal protection portion of the compressor terminal protection cover substantially covers the glass terminal of the compressor, thereby preventing dust, water, conductive foreign matter and the like from entering the glass terminal 44.

  Further, the nut 47 is fastened to the threaded portion 46 a to fix the compressor terminal protective cover 60 to the rod 46.

  FIG. 10 is a view for comparison, which corresponds to FIG. A conventional compressor terminal protective cover is formed by injection molding a thermoplastic resin such as PPE (polyphenylene ether).

  The conventional compressor terminal protection cover 160 includes a terminal protection part 163 and a foot part 162. The terminal protection part 163 is a part that covers the glass terminal 44 of the compressor 1 and protects the glass terminal 44 from dust, water, conductive foreign matter, and the like. Further, the compressor terminal protective cover 160 is fixed to the rod 46 of the hermetic container 21 of the compressor 1 by the legs 162.

  However, the conventional compressor terminal protective cover 160 is similar to the compressor terminal protective cover 60 of the present embodiment in that the board assembly 70 in which the three-axis acceleration sensor is mounted on the board is the top surface portion of the terminal protective part 163. It is not buried in.

  11 and 12 show the first embodiment. FIG. 11 is a perspective view of the compressor terminal protective cover 60 as viewed from above. FIG. 12 is a perspective view of the compressor terminal protective cover 60 as viewed from the bottom. It is.

  The compressor terminal protective cover 60 will be further described with reference to FIGS. 11 and 12. As described above, the compressor terminal protective cover 60 covers the glass terminal 44 of the compressor 1 and protects the glass terminal 44 from dust, water, conductive foreign matter, and the like, and the compressor 1. A substrate assembly 70 is embedded in a mold part 61 including a foot part 62 fixed to the rod 46 of the hermetic container 21.

  As shown in FIG. 11, the end surface of the protrusion 85 of the board pressing component 80 described later is exposed on the upper surface of the terminal protection portion 63. This point will be described later.

  As shown in FIG. 12, a protrusion 83 of a board pressing component 80 described later protrudes from the bottom surface of the terminal protection portion 63. This point will also be described later.

  FIGS. 13 to 15 are diagrams showing the first embodiment. FIG. 13 is a perspective view of the board assembly 70 viewed from the acceleration sensor 72 side. FIG. 14 is an exploded perspective view of the board assembly 70 viewed from the acceleration sensor 72 side. FIG. 15 is a perspective view of the substrate assembly 70 as viewed from the opposite side of the acceleration sensor 72.

  As shown in FIGS. 13 to 15, the board assembly 70 includes a board 71 on which at least an acceleration sensor 72 is mounted, a board-in connector 75 to which a lead wire 74 is connected and soldered to the board 71, and a lead wire. A lead wire lead-out component 73 that leads out 74 and a substrate pressing component 80 assembled to the substrate 71 are provided.

  At the outer peripheral edge of each side of the substantially square substrate 71, notches 76 a to which the first retaining portions 81 (three pieces) and the second retaining portions 84 (one piece) of the substrate holding member 80 are retained. 76b is formed.

  The cutouts 76a and 76b in the drawing are substantially square, but are not limited to this, and may have any shape corresponding to the retaining portion of the board pressing component.

  The two notches 76a are formed at substantially the center of two sides adjacent to the side to which the board-in connector 75 is soldered. The two notches 76a face each other with the acceleration sensor 72 therebetween.

  One first locking portion 81 and second locking portion 84 are locked to the two notches 76a.

  The notch 76b formed on the side to which the board-in connector 75 is soldered is formed at a position shifted from the center of the side so as not to overlap the board-in connector 75.

  The notch 76b on the opposite side of the side to which the board-in connector 75 is soldered is formed symmetrically with the notch 76b formed on the side to which the board-in connector 75 is soldered.

  Two first locking portions 81 are locked to the two notches 76b.

  16 to 22 are diagrams showing the first embodiment. FIG. 16 is a perspective view of the board pressing component 80 as viewed from above. FIG. 17 is a top view of the board pressing component 80. FIG. 19 is a perspective view of the substrate pressing component 80 as viewed from the bottom, FIG. 20 is a bottom view of the substrate pressing component 80, FIG. 21 is an enlarged perspective view of the first locking portion 81, and FIG. FIG. 6 is an enlarged perspective view of a stop portion 84.

  The board pressing component 80 will be described in detail with reference to FIGS. As shown in the drawing, the board pressing component 80 has a substantially rectangular frame shape as a whole. The substrate pressing component 80 has protrusions 85 (four) standing upright at the four corners of the surface of the substrate 71 on the acceleration sensor 72 side.

  The substrate pressing component 80 is formed by injection molding a thermoplastic resin such as PBT (polybutylene terephthalate).

  The four protrusions 85 of the substrate holding member 80 are positioned in one of the axial directions of the substrate assembly 70 (axial direction when attached to the compressor 1) when the compressor terminal protective cover 60 is molded. .

  Therefore, as shown in FIG. 11, the end surfaces of the four protrusions 85 of the board pressing component 80 are exposed on the upper surface of the terminal protection portion 63 of the compressor terminal protection cover 60.

  The board pressing component 80 is formed into a substantially rectangular frame shape as a whole by the four connecting portions 86.

  The first locking portions 81 (three) and the second locking portions 84 described above are formed on the surface of the four connecting portions 86 opposite to the protrusions 85.

  The first anchoring portion 81 includes a substantially prismatic foot portion 82 extending from the connecting portion 86 and a substantially cylindrical protrusion 83 formed at the tip of the foot portion 82 (see particularly FIG. 21). Further, a step portion 82 a is formed on the foot portion 82 of the first locking portion 81. The foot 82 is fitted into the notches 76 a and 76 b of the substrate 71, and the substrate 71 is sandwiched between the connecting portion 86 and the stepped portion 82 a, so that the substrate pressing component 80 is fixed to the substrate 71. However, a second anchoring portion 84 described later has a similar function, and the substrate holding component 80 is held by the substrate by sandwiching the substrate 71 between the first anchoring portion 81 and the second anchoring portion 84. It is fixed to 71.

  Assembling of the substrate pressing component 80 and the substrate 71 is achieved by fitting the foot portion 82 and the second locking portion 84 of the first locking portion 81 of the substrate pressing component 80 into the notches 76 a and 76 b of the substrate 71. As much as possible, it is possible to prevent displacement of the substrate 71 in the horizontal direction and the rotational direction.

  The end surface of the foot portion 82 of the first anchoring portion 81 opposite to the stepped portion 82a is formed in the axial direction of the substrate assembly 70 (when attached to the compressor 1) when the compressor terminal protective cover 60 is molded. This is a mold installation surface 87 which is the other positioning in the axial direction).

  At the time of molding of the compressor terminal protective cover 60, the mold is molded by sandwiching the four protrusions 85 of the substrate pressing component 80 and the three mold installation surfaces 87, thereby forming the substrate 71. Positioning in the axial direction can be performed.

  At the time of molding the compressor terminal protective cover 60, the substantially cylindrical projections 83 (three) formed at the tip of the foot portion 82 of the first locking portion 81 are formed in corresponding holes (described later) of the mold. ) And molding, it is possible to prevent displacement of the substrate 71 in the horizontal direction and the rotational direction due to the molding pressure during molding.

  As shown in FIG. 22 in particular, the second locking portion 84 does not have a portion corresponding to the substantially cylindrical protrusion 83 formed at the tip of the foot portion 82 of the first locking portion 81. The reason for this will be described below.

  As shown in FIGS. 6 and 7, the first surface of the board pressing component 80 on the back surface of the terminal protection portion 63 of the compressor terminal protection cover 60 (the surface on the side of the sealed container 21 when attached to the compressor 1). Three substantially cylindrical projections 83 formed at the tip of the foot portion 82 of the anchoring portion 81 protrude from the three.

  The second locking portion 84 is buried in the side wall 63a of the terminal protection portion 63 of the compressor terminal protection cover 60 after molding. Thus, even if the projection 83 corresponding to the second locking portion 84 is formed, it is buried inside the side wall 63a of the terminal protection portion 63 and does not protrude to the outside. The portion corresponding to the substantially cylindrical protrusion 83 formed at the tip of the foot portion 82 of the one locking portion 81 is not formed.

  Here, the acceleration sensor 72 will be described. The acceleration sensor 72 is a small sensor that can detect a physical quantity such as acceleration (in addition, force, magnetism) for each of the three-dimensional components. A gauge resistor is formed on a semiconductor substrate such as silicon, and the external force is applied to the acceleration sensor 72. Based on this, the mechanical distortion generated in the substrate is converted into an electrical signal using the piezoresistance effect. The basic principle is disclosed, for example, in the international application (WO 93/02342).

  FIG. 23 shows the first embodiment and is a basic configuration diagram of the acceleration sensor 72. The configuration of the acceleration sensor 72 will be briefly described with reference to FIG.

  The acceleration sensor 72 is a triaxial force / moment sensor that detects triaxial force / moment. In the acceleration sensor 72, a Si substrate 92 (strain body) is fixed to a pedestal 91, and a weight body 93 is joined to the Si substrate 92 (strain body).

  The force applied to the Si substrate 92 causes distortion in a piezoresistor (not shown) formed on the Si substrate 92. The electrical resistance of the piezoresistor changes in proportion to the strain based on the piezoresistance effect. The force is detected using this resistance change.

  By forming a diaphragm on the Si substrate 92 and using the Si substrate 92 as a strain generating body, it functions as a three-axis acceleration sensor.

  Three sets of gauge resistors for detecting triaxial acceleration components are formed on the surface of the Si substrate 92. An annular diaphragm is formed on the back surface of the Si substrate 92, a weight body 93 is joined to the center portion, and a pedestal 91 is joined to the peripheral portion.

  When acceleration in the X or Y axis direction or the Z axis direction acts on the weight body 93, the annular diaphragm is displaced in each direction. At this time, each axis acceleration can be detected independently by connecting a gauge resistor formed on the Si substrate 92 to the bridge circuit.

  24 and 25 are diagrams showing the first embodiment, FIG. 24 is an exploded view showing a state before the mold 200 of the compressor terminal protective cover 60 is set, and FIG. 25 is a terminal protective cover 60 for the compressor. It is a figure which shows the state which set the mold 200 of this.

  As shown in FIGS. 24 and 25, the mold 200 of the compressor terminal protective cover 60 includes an upper mold 201 and a lower mold 202.

  During molding of the compressor terminal protective cover 60, substantially cylindrical projections 83 (three) formed at the tip of the foot portion 82 of the first locking portion 81 are inserted into the corresponding holes 203 of the mold. By performing the molding, it is possible to prevent the positional deviation in the horizontal direction and the rotation direction of the substrate 71 due to the molding pressure at the time of molding.

FIG. 26 is a diagram showing the first embodiment, and is a diagram showing a manufacturing process of the compressor terminal protective cover 60. The manufacturing process of the compressor terminal protective cover 60 will be described with reference to FIG.
(1) Step 1: The substrate 71 is manufactured. An acceleration sensor 72 that detects the acceleration of the compressor 1 using the piezoresistance effect is mounted on the substrate 71. Further, a lead wire lead-out component 73 that leads out the lead wire 74 is attached to the substrate 71 in the vicinity of the outer peripheral edge thereof. At the same time, the substrate pressing component 80 is manufactured using a thermoplastic resin.
(2) Step 2: Fix the board pressing component 80 to the board 71. A substrate pressing component 80 formed by injection molding a thermoplastic resin such as PBT (polybutylene terephthalate) is assembled to the substrate 71 to which the lead wire lead-out component 73 is attached, and the substrate assembly 70 is manufactured.
(3) Step 3: The board assembly 70 is molded with a thermosetting resin such as BMC (unsaturated polyester) to manufacture the terminal protective cover 60 for a compressor.

  In the compressor terminal protective cover 60 configured as described above, the rod 46 provided in the compressor 1 is provided via the screw hole 62a provided in the foot 62 of the compressor terminal protective cover 60. By screwing and fixing to the screw portion 46a, the acceleration sensor 72 can be assembled to the compressor 1 without increasing the manufacturing process of the compressor 1.

  Further, the first locking portion 81 and the second locking portion 84 of the substrate pressing component 80 are locked and assembled to the substrate 71, and the mold 200 is connected to the protrusion 85 and the first locking portion 81. By sandwiching and molding, the substrate 71 can be positioned in the axial direction.

  Further, by inserting the projection 83 provided at the tip of the first locking portion 81 of the substrate pressing part 80 into the corresponding hole 203 of the mold 200 and molding the substrate, the substrate due to the molding pressure at the time of molding is molded. It is possible to prevent the positional deviation of 71 in the horizontal direction and the rotational direction.

  Further, the foot holding part 80 and the second locking part 84 of the first locking part 81 provided in the board holding part 80 are fitted into the notches 76 a and 76 b provided in the board 71, whereby the board pressing part 80 and the board 71. As a result, it is possible to prevent displacement of the substrate 71 in the horizontal direction and in the rotational direction.

  As described above, the compressor terminal protective cover 60 according to this embodiment includes the board 71 mounted with the acceleration sensor 72 that detects the acceleration of the compressor 1 using the piezoresistance effect, and the compressor terminal protective cover 60. Since it is integrally molded with a thermosetting resin so as to be buried in the top surface of the compressor, the acceleration sensor 72 is assembled to the compressor 1 without increasing the manufacturing process of the compressor 1, and the manufacturing cost is low. Can be achieved.

  In addition, since a substrate pressing part 80 formed by injection molding a thermoplastic resin such as PBT (polybutylene terephthalate) on the substrate 71 is assembled to prevent positional displacement of the substrate 71 during molding, The assembly accuracy of the acceleration sensor 72 is improved, and the reliability of the compressor 1 can be improved.

  Examples of utilization of the present invention include a compressor equipped with the compressor terminal protective cover of the present invention, an air conditioner equipped with the compressor, and a water heater.

  DESCRIPTION OF SYMBOLS 1 Compressor, 2 Four-way valve, 3 Outdoor heat exchanger, 5 Indoor heat exchanger, 6 Outdoor fan, 7 Indoor fan, 8 Bottom plate, 9 Top panel, 10 Front panel, 11 Side panel, 12 Separator, 13 Electrical box, 14 Refrigerant piping / refrigerant circuit parts, 21 Airtight container, 22 Electric motor, 22a Stator, 22b Rotor, 23 Compression mechanism, 24 Crankshaft, 24a Main shaft, 24b Sub shaft, 24c Main shaft side eccentricity Part, 24d secondary shaft side eccentric part, 24e intermediate shaft, 24f inner diameter, 26 main bearing, 27 secondary bearing, 28 first cylinder, 29 second cylinder, 30 partition plate, 31a first piston, 31b second Piston, 32 Volt, 33 Volt, 40 Accumulator, 41 Suction connection pipe, 42 Suction connection pipe, 43 Discharge pipe, 44 Glass terminal 45 Lead wire, 46 Rod, 46a Screw part, 46b Stepped part, 47 Nut, 50 Oil supply hole, 60 Compressor terminal protective cover, 61 Mold part, 62 Foot part, 62a Screw hole, 63 Terminal protective part, 63a Side wall, 70 Board assembly, 71 Board, 72 Acceleration sensor, 73 Lead wire lead-out part, 74 Lead wire, 75 Board-in connector, 76a Notch, 76b Notch, 80 Board retainer part, 81 First locking part, 82 feet Part, 82a step part, 83 protrusion, 84 second locking part, 85 protrusion, 86 connecting part, 87 mold installation surface, 91 pedestal, 92 Si substrate, 93 weight body, 100 outdoor unit, 160 for compressor Terminal protection cover, 161 mold part, 162 foot part, 163 terminal protection part, 200 mold mold, 01 upper mold, 202 the lower mold, 203 holes.

Claims (8)

A compressor terminal protective cover that is provided in a compressor constituting a part of the refrigeration cycle and protects a terminal to which power is supplied to the compressor;
The compressor terminal protective cover is
A terminal protector for protecting the terminal;
A foot fixed to the sealed container of the compressor;
A board assembly having a board on which an acceleration sensor for detecting the three-axis acceleration of the compressor using a piezoresistance effect is mounted;
A terminal protective cover for a compressor, which is manufactured by integrally molding the substrate with a thermosetting resin so as to be embedded in the terminal protective portion. The board assembly is assembled to the board, and includes a frame holding board holding part made of a thermoplastic resin and having a substantially rectangular frame shape as a whole.
The substrate holding part is
Protrusions formed standing on the four corners of the frame shape,
A connecting portion for connecting the protrusions;
A locking portion formed upright on the surface opposite to the protrusion, and
The latching portion is latched and assembled to the substrate, and the mold is positioned by clamping the projection and the latching portion to perform axial positioning of the substrate. The terminal protective cover for a compressor according to claim 1.   The anchoring portion has a mold installation surface of a mold, includes a plurality of protrusions extending from the mold installation surface, and is provided at a tip of the anchoring portion in a corresponding hole of the mold die. The terminal protective cover for a compressor according to claim 2, wherein the projection is inserted and molded.   4. The terminal protection cover for a compressor according to claim 2, wherein a plurality of notches are provided on an outer periphery of the substrate, and the locking portion provided in the substrate holding part is fitted into the notch. 5. . A sealed container;
A terminal provided in the hermetic container and supplying power to the compressor;
Fixed to the sealed container, and a rod for conveying the compressor;
The compressor comprising the terminal protection cover for a compressor according to any one of claims 1 to 4, wherein the terminal protection portion covers the terminal and the foot portion is fixed to the rod. .   An air conditioner in which the compressor according to claim 5 is mounted on an outdoor unit.   A water heater equipped with the compressor according to claim 5. It is a manufacturing method of the terminal protection cover for compressors according to claim 1,
A first step of mounting the acceleration sensor on the substrate and attaching a lead wire lead-out component that leads out a lead wire, and manufacturing the substrate pressing component;
A second step of assembling the substrate pressing component to the substrate;
And a third step of manufacturing the compressor terminal protection cover by molding the substrate assembly to which the substrate pressing component is assembled with a thermosetting resin. Manufacturing method of the cover.

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