JP2015161431A - Outdoor unit and air conditioner using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor unit capable of preventing the stagnation of refrigerant and reducing noise leaking to outside at low cost, and an air conditioner using the same.SOLUTION: An air conditioner 1 comprises: a compressor 21; and an inverter device 31 driving an electric motor 102 of the compressor 21, the inverter device 31 includes a power module 42 driving the compressor 21, and the power module 42 is attached to an outer shell of the compressor 21 below a position at which the electric motor 102 is installed, and structured to be covered by a soundproof member 202 and a cut-and-raised portion 201a of a partition plate 201.

Description

  The present invention relates to an outdoor unit that drives a compressor using a power module and an air conditioner using the same.

  2. Description of the Related Art Conventionally, a power module having a power control semiconductor element is used to control power supplied to a compressor in an air conditioner. This power module is mainly used as a switching element of an inverter circuit, and generates heat when performing a switching operation. Here, it has been proposed to heat the refrigerant circulating in the air conditioner using this heat generation (see Patent Document 1). In Patent Document 1, the power module is covered with a casing, and the heat radiating surface of the casing is thermally connected to a refrigerant introduced into the compressor, and heat generated in the power module is heated to the refrigerant. An air conditioner for transmission is disclosed.

JP 2003-153552 A (refer to claim 1)

  In Patent Document 1, the power module is installed in an electrical component box. Therefore, noise generated by driving the power module is absorbed in the electrical component box. The noise is transmitted from the electric component box to the casing of the outdoor unit, and is electrically grounded in the casing of the outdoor unit. On the other hand, it is also considered that the power module is installed in a compressor outside the electrical component box and the compressor is heated directly from the power module. However, in this case, noise generated from the power module is likely to propagate to the outside, and therefore it is desired to suppress adverse effects of noise generated from the power module on surrounding components.

  The present invention has been made to solve the above-described problem, and an outdoor unit that can reduce the noise generated from the power module while preventing the stagnation of the refrigerant inside the compressor using the power module, and It is providing the air conditioning apparatus using this.

  An outdoor unit of the present invention is an outdoor unit in which a compressor provided with an electric motor, a heat exchanger connected to the compressor, and an outdoor fan that blows air to the heat exchanger are installed in a housing, A power module that is attached to a position below the electric motor and is driven when power is supplied to the electric motor of the compressor, and a blower chamber and a compressor in which an outdoor fan is accommodated inside the housing. It has a partition plate partitioned into a machine room to be accommodated, and the partition plate is formed with a cut-and-raised portion that covers the upper part of the compressor.

  According to the present invention, since the power module is attached to the outer shell of the compressor, it is possible to prevent the refrigerant from sleeping in the compressor using the heat generated from the power module, and at the top of the compressor. Since the cut-and-raised portion is provided, the noise that is transmitted upward from the power module can be absorbed by the cut-and-raised portion, so that the noise of the power module can be reduced at low cost.

It is a refrigerating cycle circuit diagram which shows preferable embodiment of the air conditioning apparatus of this invention. It is a schematic diagram which shows an example of the preferable outdoor unit of the outdoor unit of this invention. It is a schematic diagram which shows the external appearance structure of the compressor accommodated in the outdoor unit of FIG. It is sectional drawing which shows an example of the internal structure of the compressor of FIG. It is a block diagram which shows an example of the inverter apparatus in the outdoor unit of FIG. It is a schematic diagram which shows an example of the machine room of the outdoor unit of FIG. It is a schematic diagram which shows an example of the partition plate in the outdoor unit of FIG. It is a schematic diagram which shows an example of the soundproof member in the outdoor unit of FIG. It is a schematic diagram which shows another embodiment of the outdoor unit of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a refrigeration cycle circuit diagram of a refrigeration cycle circuit 11 of an air conditioner according to an embodiment of the present invention. Each structure of the air conditioning apparatus 1 shown below shows an example, and is not limited to these. As shown in FIG. 1, the air conditioner 1 of FIG. 1 performs cooling operation and heating operation using a refrigeration cycle (heat pump cycle) that circulates refrigerant, and includes an outdoor unit 1A and an indoor unit 1B. Have. In the air conditioner 1, the outdoor unit 1A and the indoor unit 1B constitute a refrigeration cycle circuit 11 connected via a refrigerant pipe.

  The refrigeration cycle circuit 11 is filled with a refrigerant, and performs a vapor compression refrigeration cycle by circulating the refrigerant in the refrigerant pipe. The refrigerant to be filled is, for example, an ammonia refrigerant or a chlorofluorocarbon refrigerant, but is not limited thereto, and a known refrigerant can be used. In the refrigeration cycle circuit 11, a compressor 21, a flow path switch 22, an outdoor heat exchanger 23, an indoor heat exchanger 25, and an expansion valve 27 are connected. Among these, the compressor 21, the flow path switch 22, the outdoor heat exchanger 23, and the expansion valve 27 are installed in the outdoor unit 1A, and the indoor heat exchanger 25 is installed in the indoor unit 1B.

  The compressor 21 compresses the refrigerant to a high temperature and a high pressure, and includes, for example, a rotary type compressor. The flow path switch 22 is composed of, for example, a four-way valve having four ports from first to fourth, and switches the connection relationship in the refrigeration cycle circuit according to the operation state such as cooling operation or heating operation. Is. In the flow path switch 22, the first port 45 is connected to a discharge pipe 91 on the discharge side of the compressor 21. The flow path switch 22 has a fourth port 48 connected to the indoor heat exchanger 25. The flow path switch 22 has a third port 47 connected to the suction side of the compressor 21. The flow path switch 22 has a second port 46 connected to the outdoor heat exchanger 23. In the flow path switching unit 22, the first port 45 and the second port 46 are connected and the third port 47 and the fourth port 48 are connected during the cooling operation. On the other hand, during the heating operation, the first port 45 and the fourth port 48 are connected, and the second port 46 and the third port 47 are connected.

  The outdoor heat exchanger 23 exchanges heat between the refrigerant supplied from the expansion valve 27 and outdoor air, or exchanges heat between the refrigerant supplied from the compressor 21 and air from the outdoor unit. is there. The outdoor heat exchanger 23 has a structure including, for example, a heat transfer tube that allows a refrigerant to pass therethrough and fins for increasing the heat transfer area between the refrigerant flowing through the heat transfer tube and the outside air. The outdoor fan 24 blows air to the outdoor heat exchanger 23, and discharges the air in which heat is exchanged between the refrigerant flowing inside the outdoor heat exchanger 23 and the outdoor air to the outside of the outdoor unit.

  The indoor heat exchanger 25 exchanges heat between the refrigerant supplied from the compressor 21 and room air during heating operation, and exchanges heat between the refrigerant supplied from the expansion valve 27 and room air during cooling operation. To do. The indoor heat exchanger 25 has a structure including, for example, a heat transfer tube that allows the refrigerant to pass therethrough and fins for increasing the heat transfer area between the refrigerant flowing through the heat transfer tube and the outside air. The indoor unit is provided with an indoor fan 26 that blows air to the indoor heat exchanger 25. The indoor fan 26 sucks indoor air, and sends out the air in which the sucked indoor air and the refrigerant flowing in the indoor heat exchanger 25 are heat-exchanged into the room.

  The expansion valve 27 is a decompression unit that decompresses the refrigerant, and is formed of, for example, an electronic expansion valve. The expansion valve 27 decompresses the refrigerant supplied from the indoor heat exchanger 25 during the heating operation, and supplies it to the outdoor heat exchanger 23. The expansion valve 27 decompresses the refrigerant supplied from the outdoor heat exchanger 23 during the cooling operation and supplies the decompressed refrigerant to the indoor heat exchanger 25.

  Next, an example of the operation of the air conditioner 1 during the cooling operation will be described with reference to FIG. First, in the flow path switching unit 22, the discharge side of the compressor 21 and the outdoor heat exchanger 23 are connected, and the suction side of the compressor 21 and the indoor heat exchanger 25 are connected. The low-pressure gas refrigerant is compressed in the compressor 21 to become high-pressure gas. The refrigerant in the high-pressure gas state is heat-exchanged with the outside air in the outdoor heat exchanger (condenser) 23 and is condensed by transferring the energy of the refrigerant to a heat source (air or water) to become a high-pressure liquid refrigerant. Thereafter, the refrigerant is decompressed by the expansion valve 27 to be in a low-pressure two-phase state, and flows into the indoor heat exchanger 25. In the indoor heat exchanger (evaporator) 25, water or air exchanged with the refrigerant is cooled. Thereafter, the refrigerant flowing out of the indoor heat exchanger 25 is sucked into the compressor 21.

  Next, with reference to FIG. 1, the operation example at the time of the heating operation of the air conditioning apparatus 1 is demonstrated. First, in the flow path switching unit 22, the discharge side of the compressor 21 and the indoor heat exchanger 25 are connected, and the outdoor heat exchanger 23 and the suction side of the compressor 21 are connected. The refrigerant enters the compressor 21 with a low-pressure gas and is compressed into a high-pressure gas. Thereafter, the refrigerant in the high-pressure gas state flows into the indoor heat exchanger (condenser) 25. As the refrigerant passes through the path in the indoor heat exchanger 25, the energy of the refrigerant is transmitted to water or air on the load side. At this time, the refrigerant condenses to become a high-pressure liquid refrigerant, and heat-exchanged water and indoor air are heated.

  Thereafter, the high-pressure liquid refrigerant flows from the indoor heat exchanger (condenser) 25 into the expansion valve 27. In the expansion valve 27, the refrigerants that have passed through a plurality of paths of the indoor heat exchanger 25 are collected and reduced in pressure to be in a low-pressure two-phase state. The refrigerant in the low-pressure two-phase state reaches the outdoor heat exchanger (evaporator) 23. In the outdoor heat exchanger 23, the refrigerant absorbs the energy of outside water and air and evaporates to become low-pressure gas. Thereafter, the refrigerant returns to the suction side of the compressor 21 via the flow path switch 22.

  FIG. 2 is a schematic view showing an example of a preferred outdoor unit of the outdoor unit of the present invention. An outdoor unit 1A shown in FIG. 2 contains a compressor 21 and a flow path switch 22 (not shown) inside a housing 2, and the inside of the housing 2 is machine room 2A, blower chamber 2B, It has the metal partition plate 201 partitioned into two. A compressor 21 and a flow path switch 22 are disposed on the machine room 2A side, and an electrical component box 41 and a power module 42 for controlling the operation of the outdoor unit 1A such as the compressor 21 are accommodated. ing. On the other hand, an outdoor heat exchanger 23 and an outdoor fan 24 are disposed on the blower chamber 2B side.

  FIG. 3 is a schematic diagram showing an external configuration of the compressor 21 housed in the outdoor unit 1A of FIG. The compressor 21 of FIG. 3 is covered with an outer shell 80, and the outer shell 80 is formed with a sealed space inside by joining, for example, a top plate portion 81, a body portion 82, and a low plate portion 83 by welding or the like. It has a structure. A discharge pipe 91 that discharges the refrigerant compressed by the compressor 21 to the outside of the compressor 21 is connected to the top plate portion 81. The discharge pipe 91 is connected to the first port 45 via a refrigerant pipe (see FIG. 1).

  The trunk portion 82 is connected to the suction muffler 61 via the upper connecting pipe 72 and the lower connecting pipe 73. The suction muffler 61 includes a suction pipe 71, an upper connection pipe 72, and a lower connection pipe 73. The suction muffler 61 sucks the refrigerant supplied from the refrigeration cycle circuit 11 shown in FIG. To supply. The suction pipe 71 is provided at the upper end of the suction muffler 61, and the upper connection pipe 72 and the lower connection pipe 73 are provided at the lower end of the suction muffler 61. Specifically, the suction pipe 71 sucks the refrigerant from the refrigeration cycle circuit 11 through the refrigerant pipe, and then supplies the refrigerant to the upper compressor 124 (see FIG. 4) through the upper connection pipe 72. The refrigerant is supplied to the lower compressor 125 (see FIG. 4) through 73.

  4 is a sectional view showing an example of the internal structure of the compressor shown in FIG. As shown in FIG. 4, the compressor 21 includes an electric motor 102 and a compression mechanism 123. The electric motor 102 is composed of, for example, a brushless DC motor, and includes a stator 131 and a rotor 132.

  The stator 131 is formed of a winding, an iron core, a substrate, and the like (both not shown), and the winding wound around the iron core a predetermined number of times generates an induction magnetic field, thereby A rotating magnetic field is generated.

  The rotor 132 has a permanent magnet and is rotated by a rotating magnetic field generated by the stator 131. A crankshaft 122 is fixed to the rotor 132, and the crankshaft 122 includes a crankshaft upper eccentric portion 122a and a crankshaft lower eccentric portion 122b that rotate eccentrically in conjunction with its rotation.

  The compression mechanism unit 123 is formed of an upper compressor 124 and a lower compressor 125. The upper compressor 124 is formed from a frame 141, an upper cylinder 142, and a partition member 143. The lower compressor 125 includes a partition member 143, a lower cylinder 144, and a cylinder head 145. The upper cylinder 142 is connected to the upper connecting pipe 72 and is driven by the eccentric rotation of the crankshaft upper eccentric portion 122a to compress the refrigerant. The lower cylinder 144 is connected to the lower connecting pipe 73 and is driven by the eccentric rotation of the crankshaft lower eccentric portion 122b to compress the refrigerant.

  Next, an operation example of the compressor 21 will be described with reference to FIGS. 3 and 4. Note that the refrigerant circulating in the refrigeration cycle circuit 11 is sucked into the suction muffler 61 through the suction pipe 71. When a rotating magnetic field is generated in the stator 131 of the electric motor 102 and the rotor 132 rotates, the crankshaft 122 rotates with the rotation of the rotor 132. When the crankshaft 122 rotates, an upper rolling piston (not shown) is eccentrically rotated by the crankshaft upper eccentric portion 122a, and at the same time, a lower rolling piston (not shown) is eccentrically rotated by the crankshaft lower eccentric portion 122b. At this time, the refrigerant is supplied to the upper cylinder 142 via the upper connecting pipe 72. At the same time, the refrigerant is supplied to the lower cylinder 144 via the lower connecting pipe 73. Then, the refrigerant is compressed by the upper rolling piston and the upper vane (not shown), and the compressed refrigerant is discharged to the outside through the discharge pipe 91.

  The configuration of the compressor 21 described above is an example of a twin rotary compressor, and is not limited to this. For example, a single rotary compressor may be used, or vane compression may be used. It may be a machine. Moreover, although the case where the electric motor 102 of the compressor 21 is a brushless DC motor is illustrated, a known motor using an inverter such as an AC motor can be used.

  As shown in FIGS. 1 and 3, the compressor 21 includes an electrical component housed in an electrical component box 41 and a power module 42 installed in an outer shell 80 of the compressor 21 that is outside the electrical component box 41. Driven by. Specifically, the electrical components in the electrical component box 41 and the power module 42 constitute an inverter device 31, and the compressor 21 is driven by electric power supplied from the inverter device 31. The electrical component box 41 and the power module 42 are connected by a wiring 51, and the power module 42 and the compressor 21 are electrically connected by a wiring 53 in the top plate portion 81. That is, the compressor 21 is electrically connected to the inverter device 31 via the wiring 53.

  FIG. 5 is a block diagram showing an example of the inverter device 31 in the outdoor unit 1A of FIG. As illustrated in FIG. 5, the inverter device 31 includes a converter circuit 111, an inverter circuit 112, and a control unit 113.

  The converter circuit 111 is connected to an alternating current power supply 101 that is a commercial power supply, and rectifies the alternating current supplied from the alternating current power supply 101 and converts it into direct current. Specifically, the converter circuit 111 has a known configuration such as a rectifier and a boost chopper circuit, and smoothes the rectified direct current after rectifying the alternating current, and supplies the smoothed direct current to the inverter circuit 112. Is.

  The inverter circuit 112 converts the smoothed direct current supplied from the converter circuit 111 into alternating current and supplies it to the electric motor 102 of the compressor 21. For example, the inverter circuit 112 includes a smoothing capacitor and the like from the power module 42 functioning as a switching element. It is configured. As described above, in the inverter circuit 112, the smoothing capacitor and the like are accommodated in the electrical component box 41, and the power module 42 is attached to the outer shell 80 of the compressor 21. The operation of the inverter circuit 112 is controlled by the control unit 113, and by supplying a switching signal from the control unit 113 to the power module 42, predetermined power is supplied from the inverter circuit 112 to the compressor 21.

  The control unit 113 controls the power module 42 based on an external control signal. Furthermore, the outdoor unit 1A is provided with a temperature detection unit 44 that detects the temperature of the power module 42 through the heat transfer unit 43 at a predetermined cycle, and the control unit 113 responds to the detection result of the temperature detection unit 44. It has a function of controlling the operation of the power module 42. Thereby, the power module 42 controls the switching operation of the switching element mounted in the power module 42 with a switching signal suitable for the condition based on various conditions. As a result, the electric motor 102 rotates at a rotational speed corresponding to the conditions to generate output torque, and the compressor 21 is driven according to the conditions.

  In addition, the control unit 113 has a function of executing restraint energization for heating the motor 102 in order to prevent the refrigerant in the compressor 21 from stagnation when the compressor 21 is stopped. Here, when restraint energization is executed, the power module 42 also generates heat to perform the switching operation. The power module 42 is provided on the outer shell 80 (body portion 82) of the compressor 21, and is installed below the position Hc of the electric motor 102 in the outer shell 80 of the compressor 21. Therefore, since the region where it is difficult for the heat of the electric motor 102 to be transmitted can be heated by the power module 42, the stagnation of the refrigerant can be efficiently suppressed.

  The control unit 113 performs control so that a high-frequency phase loss current is applied to the electric motor 102 at the time of restraint energization. Alternatively, the control unit 113 may control the motor 102 to apply a high-frequency voltage having a frequency higher than the operating frequency. As a result, the electric motor 102 generates heat due to copper loss, and the power module 42 generates heat due to the switching operation. The heat generated in the power module 42 is transmitted to the outer shell 80 of the compressor 21 through the heat transfer section 43, and the compressor 21 is heated. As a result, the winding impedance of the motor 102 is increased, and the current flowing through the winding is reduced and the copper loss is reduced. it can.

  The power module 42 is composed of a wide band gap element, and functions as a switching element in the inverter circuit 112. A wide band gap device is a semiconductor having a band gap larger than 2 [eV], such as a nitride semiconductor such as gallium nitride (GaN), silicon carbide (SiC), or diamond. It is a high element. For example, the band gap of gallium nitride (GaN) is 3.4 [eV], and the band gap of silicon carbide (SiC) is 3.2 [eV]. The breakdown electric field strength of gallium nitride (GaN) is 3.0 [MV / cm], and the breakdown electric field strength of silicon carbide (SiC) is 3.0 [MV / cm]. Further, silicon (Si) conventionally used as a material for circuit elements has a band gap of 1.1 [MV / cm] and a dielectric breakdown electric field strength of 0.3 [MV / cm].

  The fact that the breakdown field strength is large and the band gap width is large means that the on-resistance can be lowered by thinning the element while maintaining the breakdown voltage. If the on-resistance can be lowered, power loss can be reduced. Heat loss can be reduced by reducing power loss. By reducing the amount of heat generated, the temperature is less likely to rise even if the module is downsized and the heat capacity is reduced.

  Note that the band gap is an energy region where electrons cannot exist inside the substance. In addition, the dielectric breakdown electric field strength here is the maximum electric field strength that causes dielectric breakdown in a semiconductor or an insulator.

  That is, the wide band gap element has a band gap width about three times wider and a breakdown field strength about ten times larger than a conventional silicon element. For this reason, the heat resistance and voltage resistance are superior to those made of silicon. Therefore, the cooling structure can be reduced in size by using the wide band gap element.

Furthermore, gallium nitride (GaN) and silicon carbide (SiC) have a higher electric field saturation rate than silicon (Si). Specifically, in the case of gallium nitride (GaN), the electric field saturation rate is 2.7 [1 × 10 ⁷ cm / s], and in the case of silicon carbide (SiC), the electric field saturation rate is 2.0 [ 1 × 10 ⁷ cm / s], and in the case of silicon (Si), the electric field saturation rate is 1.0 [1 × 10 ⁷ cm / s]. A high electric field saturation rate means that harmonic drive is possible. Peripheral parts can be downsized by enabling harmonic drive.

  The power module 42 mounts a switching element using the band gap element demonstrated above. Therefore, the module is resistant to high temperatures and excellent in heat resistance, and the power loss is small. Therefore, the amount of heat generated is small, and the module can be downsized. Therefore, compared with the conventional case, the power module 42 does not need to be provided inside the electrical component box 41, and it is not necessary to dissipate heat by attaching a heat sink or the like. For this reason, when the power module 42 is formed of a band gap element, the power module 42 is not subjected to structural restrictions. Therefore, the power module 42 can be provided at a location physically separated from the electrical component box 41.

  That is, since the power module 42 is composed of a wide band gap element having excellent heat resistance, the energization can be performed for a long time. On the other hand, by installing the power module 42 in the outer wall 80 of the compressor 21, it is possible to prevent the stagnation of the refrigerant by using the heat generated by the power module 42, and to remove the heat generated in the power module 42 from the compressor 21. The heat of the power module 42 can be taken by conducting heat to the outer shell 80 side to dissipate heat.

  Next, noise generated from the power module 42 will be described. Noise occurs where the current or voltage changes abruptly, that is, where the magnetic field or electric field changes abruptly. In the case of the air conditioner 1 of FIG. 1, for example, the amount of noise generated from the compressor 21, the control unit 113, and the like and from the power module 42 included in the inverter circuit is large. That is, the power module 42 generates a PWM signal by switching the DC output supplied from the converter circuit 111. Then, the power module 42 supplies a PWM signal to the electric motor 102 and generates a rotating magnetic field in the electric motor 102 to control the rotation. That is, in the power module 42, noise is easily generated because the magnetic field and the electric field are rapidly changed by switching.

  The influence of noise may cause malfunction of the electrical components in the electrical component box 41 and further the electrical components of the indoor unit 1B due to noise generated from the power module 42, for example. Therefore, each of the general-purpose home appliances including the air conditioner 1 is controlled so as not to be adversely affected by other devices or to adversely affect other devices. There are standards.

  In the conventional outdoor unit, the power module 42 is installed in an electrical component box 41, and the electrical component box 41 is surrounded by the casing 2 of the outdoor unit 1A. For this reason, the noise which each produces | generates is transmitted from the electrical component box 41 to the housing | casing 2 of the outdoor unit 1A, and is electrically grounded. In addition, since the structure is surrounded by the electrical component box 41, the structure is not easily affected by external noise.

  FIG. 6 is a schematic diagram showing an example of a machine room 2A of the outdoor unit 1A shown in FIG. In the machine room 2 </ b> A of FIG. 6, the power module 42 is disposed on the side surface of the compressor 21 without being surrounded by the electrical component box 41. For this reason, noise generated from the power module 42 is not reduced, and there is a possibility that other peripheral devices may be adversely affected. Alternatively, the power module 42 may be erroneously operated because it is easily affected by external noise. Therefore, it is necessary to reduce the influence of noise. Therefore, in order to prevent the noise of the power module 42 from adversely affecting other electrical components and the like, a cut-and-raised portion 201a is formed in the partition plate 201 of the outdoor unit 1A.

  FIG. 7 is a schematic view showing an example of a partition plate in the outdoor unit of FIG. The partition plate 201 in FIGS. 6 and 7 has a structure having a cut-and-raised portion 201 a so as to cover the upper portion of the compressor 21. That is, the height position H1 of the cut and raised portion 201a is higher than the height position Hc of the compressor 21. Note that the position H1 of the cut-and-raised portion 201a is the same as the position Hc of the top plate portion 81 of the compressor 21 so that the noise propagated upward from the noise generated from the power module 42 does not leak and becomes too high. It is desirable to be close. Then, of the noise generated from the power module 42, the noise transmitted upward is absorbed by the cut and raised portion 201a. And the noise absorbed by the cut-and-raised part 201a can be transmitted to the housing 2 of the outdoor unit 1A electrically connected to the partition plate 201 and electrically grounded. Since this cut-and-raised portion 201 a is obtained by cutting and raising the metal partition plate 201, noise can be suppressed with a simple structure as compared with the case where a conductive plate member is simply provided on the upper portion of the compressor 21. .

  Furthermore, the outdoor unit 1A includes a soundproof member 202 that reduces noise generated from the compressor 21 during operation. FIG. 8 is a schematic diagram showing an example of the soundproof member 202 in the outdoor unit 1A of FIG. The soundproof member 202 of FIG.7 and FIG.8 is installed so that the side surface of the compressor 21 and the power module 42 may be enclosed. In particular, the soundproof member 202 is formed with a magnetically permeable region 202 a containing a magnetically permeable material (low magnetic permeable material or higher magnetic material), and the magnetic module is attached to the magnetically permeable region from the bottom plate of the housing 2. It is formed up to a position H10 higher than the height position Hm. For example, the magnetically permeable region 202 a may be formed by containing a magnetically permeable material in the soundproof member 202 or may be formed by attaching a magnetic shield material to the soundproof member 202.

  As described above, since the soundproof member 202 includes the magnetically permeable region 202a, the sound propagated in the lateral direction among the noise generated from the power module 42 can be absorbed by the soundproof member 202. In particular, since the magnetically permeable region 202a is formed up to the height position H10, the amount of use of the low magnetic permeability material is minimized and the cost is further reduced.

  The magnetically permeable region 202a only needs to be formed at the height position H10 including the position Hm where the power module 42 is attached from the bottom surface of the housing 2, and the magnetically permeable region 202a is formed in all regions of the soundproof member 202. May be.

  According to the above embodiment, the power module 42 installed on the side surface of the compressor 21 is covered with the soundproofing member 202 and the partition plate 201 to reduce noise generated from the power module 42 and propagate from the outside at a low cost. It is possible to realize a structure that is not easily affected by noise.

  Further, when the outdoor unit 1A further includes a soundproofing member provided so as to surround the side surfaces of the compressor 21 and the power module 42 in the machine room 2A, noise generated from the compressor 21 can be reduced. In particular, when the permeable region 202a is formed on the soundproof member 202 from the bottom surface of the housing 2 to the height position H10 including the position where the power module 42 is attached, noise generated from the power module 42 is permeable to the permeable region 202a. And the influence of noise generated from the power module 42 can be further suppressed.

  The embodiment of the present invention is not limited to the above embodiment. For example, in the above embodiment, the power module 42 is illustrated as being installed at a position facing the side wall of the housing in the machine room 2A. However, the power module 42 is installed at a position facing the partition plate 201. It may be. Specifically, FIG. 9 is a schematic view showing another embodiment of the outdoor unit of the present invention. Even in this case, the partition plate 201 and the cut-and-raised portion 201a can suppress the influence of noise generated from the power module 42 on the outside. 9 illustrates the case where the power module 42 directly faces the partition plate 201 without using the soundproof member 202, the sound module 202 may be installed as in FIG. .

  DESCRIPTION OF SYMBOLS 1 Air conditioning apparatus, 1A outdoor unit, 1B indoor unit, 2 housing | casing, 2A machine room, 2B blower room, 11 refrigeration cycle circuit, 21 compressor, 22 flow path switch, 23 outdoor heat exchanger, 24 outdoor fan, 25 indoor heat exchanger, 26 indoor fan, 27 expansion valve, 31 inverter device, 41 electrical component box, 42 power module, 43 heat transfer unit, 44 temperature detection unit, 45 first port, 46 second port, 47 third Port, 48 4th port, 51 wiring, 53 wiring, 61 suction muffler, 71 suction pipe, 72 upper connection pipe, 73 lower connection pipe, 80 outer shell, 81 top plate part, 82 trunk part, 83 low plate part, 91 discharge Pipe, 101 AC power supply, 102 Electric motor, 111 Converter circuit, 112 Inverter circuit, 113 Control unit, 122 Crankshaft, 122a Clan Cshaft upper eccentric part, 122b Crankshaft lower eccentric part, 123 Compression mechanism part, 124 Upper compressor, 125 Lower compressor, 131 Stator, 132 Rotor, 141 Frame, 142 Upper cylinder, 143 Partition member, 144 Lower cylinder, 145 Cylinder head, 201 Partition plate, 201a Cut-and-raised part, 202 Soundproof member, 202a Magnetically permeable area, H1 Height position of cut-raised part, H10 Height position of magnetically permeable area, Hc Compressor height position, Hm power Module location.

Claims (9)

A compressor provided with an electric motor, a heat exchanger connected to the compressor, and an outdoor fan for blowing air to the heat exchanger are installed in a housing,
A power module that is attached to a position lower than the electric motor and is driven when power is supplied to the electric motor of the compressor;
A partition plate that partitions the interior of the housing into a blower chamber in which the outdoor fan is accommodated and a machine chamber in which the compressor is accommodated.
The outdoor unit, wherein the partition plate is formed with a cut-and-raised portion that covers an upper portion of the compressor.   The outdoor unit according to claim 1, further comprising a soundproof member provided so as to surround side surfaces of the compressor and the power module in the machine room.   3. The soundproof member is formed with a magnetically permeable region containing a magnetically permeable material from a bottom surface of the housing to a height position including a position where the power module is attached. The outdoor unit described.   The outdoor unit according to any one of claims 1 to 3, wherein the power module is attached at a position facing the partition plate in an outer shell of the compressor.   The heat transfer member which is provided between the power module and the outer shell of the compressor, and further transfers heat generated in the power module to the outer shell of the compressor. The outdoor unit according to item 1. The power module includes a switching element composed of a wide gap semiconductor element,
A control unit for controlling the operation of the power module;
When the compressor is stopped, the control unit performs restraint energization to flow a current for heating the electric motor,
6. The outdoor unit according to claim 1, wherein the energization is performed by operating the switching element to flow a current to the electric motor.   The outdoor unit according to claim 6, wherein the control unit causes a high-frequency phase loss current to flow through the power module during the restraint energization.   The outdoor unit according to claim 6, wherein the control unit causes a high-frequency alternating current to flow through the power module during the restraint energization.   The air conditioning apparatus which has an outdoor unit of any one of Claims 1-8.

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