JP2012002433A - Outdoor unit for refrigeration device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor unit which employs an inexpensive and reliable method for preventing a reverse electromotive voltage generated by the reverse rotation of a motor from causing damages to electrical parts such as an inverter owing to that the reverse rotation speed of an air blower gets extremely high due to an outside wind such as a typhoon wind, and also which is suitable for energy saving during normal operations.SOLUTION: The outdoor unit is configured such that, when the outside wind is strong, an air flow collides onto a plate 11 of a blowout grille 9 from outside a body 1 and flows almost radially to outer periphery side, thereby a rotating flap 13 opens to the outside and blocks an air flow passing section of the blowout grille 9 to prevent an adverse wind from coming into an indoor unit 1x and control the reverse rotation speed of an air blower 6.

Description

  The present invention relates to an outdoor unit of a refrigeration apparatus such as an air conditioner or a heat pump type hot water heater.

  An outdoor unit of an air conditioner or a heat pump type hot water heater includes a casing that houses therein a heat exchanger and a blower fan disposed on the leeward side of the heat exchanger. As a result, the blower fan is driven and rotated by a motor, and the air exchanged with the heat in the refrigerant of the heat exchanger or the like is discharged out of the outdoor unit from the air outlet in front of the casing.

  Here, since the outdoor unit is installed outdoors, the blower fan rotates in the direction opposite to the normal drive rotation direction when the wind from outside hits the blower fan through the outlet of the outdoor unit. There is. The reverse rotation of the blower fan is, for example, when the wind is strong, such as a typhoon, the rotation speed of the blower fan becomes very high, and the blades of the blower fan are damaged. If there is, there is a problem that an electric component such as an inverter is destroyed by a counter electromotive voltage generated by the reverse rotation of the motor accompanying the reverse rotation of the blower fan.

  Therefore, as a conventional technique for suppressing reverse rotation of the blower fan due to wind from the outside (hereinafter referred to as outside wind) in the outdoor unit, there is one in which a blind is provided on the front side of the casing (see, for example, Patent Document 1). .

  FIG. 9 shows an appearance of an outdoor unit (outdoor unit) described in Patent Document 1. The outdoor unit 100 includes a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, an accumulator, and a blower (blower fan) (not shown). Moreover, the blower outlet 102 which blows off the blowing air from a ventilation fan ahead is provided in the front side of the casing 101 of the said outdoor unit 100, and the blind 103 is attached to the blower outlet 102 so that opening and closing is possible.

  When the outdoor unit 100 is normally operated, the blower fan blows out the air sucked from the rear surface side of the casing 101 through the outdoor heat exchanger forward from the outlet 102. In this case, as shown in FIG. 9A, in the outdoor unit 100, the blind 103 of the outlet 102 is pushed up by the wind pressure of the blown air from the blower fan, and the outlet 102 is opened.

  When the outdoor wind is blown from the front side of the outdoor unit, the outdoor unit 100 closes the outlet 102 with the blind 103 as shown in FIG. 101 prevents a headwind from entering the interior. Therefore, it is possible to prevent the blower fan from rotating in the reverse direction and causing damage to the blower fan and destruction of the motor drive circuit.

  In addition, there is a fan grill provided with a stopper that is rotated by a wind pressure generated by a fan or a wind pressure from outside air (for example, see Patent Document 2).

  In addition, there is a type in which a hub (boss) portion of a fan is brought into contact with a rotation suppression portion provided at a central portion of an elastic fan grill that is deformed by the wind pressure of the outside wind (for example, see Patent Document 3).

JP 2000-161715 A JP 2002-235934 A JP 2004-347209 A

  However, in the conventional configuration described in Patent Document 1, the number of parts of the outdoor unit is increased, and a mechanism and a control device for driving the blind 103 are required, which increases the product cost of the outdoor unit. In addition, there is a problem that the resistance of the airflow during normal operation of the outdoor unit increases.

  Further, in the conventional configuration of Patent Document 2 described above, friction of the rotation mechanism portion of the stopper increases due to clogging of dust or sand, and the stopper does not operate normally such as switching between normal operation and outside wind (malfunction). ).

  Further, in the conventional configuration of Patent Document 3 described above, since the outside wind does not always blow from a certain direction, the manner of deformation of the fan grill may change at the time of contact, and the material such as resin that changes elastically Then, depending on the manner of contact of the fan, there is a possibility that a force exceeding the breaking strength may be partially applied, and there is a problem that malfunctions such as a grill of an elastic material such as resin and damage to the fan are likely to occur.

  The present invention solves the above-mentioned conventional problems. For example, the wind speed of an outside wind such as a typhoon is high, the rotational speed of the reverse rotation of the blower is very high, and the fan blade itself or the blower is an inverter drive type. If there is, the problem of damaging electrical components such as inverters due to the back electromotive force generated by the reverse rotation of the motor accompanying the reverse rotation of the blower can be prevented in an inexpensive and reliable manner, and can be saved during normal operation. An outdoor unit suitable for energy generation is provided.

  In order to solve the above-described conventional problems, the outdoor unit of the refrigeration apparatus of the present invention is provided with a blower provided in the housing, a heat exchanger provided on the back side of the blower, and a front side of the blower. A blowout grill is provided, and the blowout grill has a structure that increases ventilation resistance when air flows from the blowout grill.

  With this configuration, when the outside wind is strong, such as a typhoon, the airflow resistance of the air path of the outdoor unit is increased by the structure provided in the blowout grill, and the rotational speed of the reverse rotation of the blower is suppressed. In addition, when an air conditioner or heat pump water heater with an outdoor unit installed is normally operated, and the airflow that flows from the air intake side of the heat exchanger passes through the outdoor unit by the blower (hereinafter referred to as forward wind) ), The structure of the blow grill is variable so as to keep the draft resistance low.

  The outdoor unit having such a configuration can suppress the reverse rotation speed of the blower from becoming extremely large when the outside wind is strong, while keeping the wind path resistance of the outdoor unit small during a normal wind and reducing the predetermined air volume. The input of the motor at the time of taking out can be suppressed as much as possible, and the increase in the blowing noise due to the increase in the air path resistance can be suppressed.

The outdoor unit of the refrigeration apparatus of the present invention has a problem that the blade itself of the blower is damaged when the outside wind is strong such as a typhoon, or the motor of the motor accompanying the reverse rotation of the blower when the blower is an inverter drive type. The problem of electrical components such as inverters being damaged by the counter electromotive voltage generated by reverse rotation is prevented by an inexpensive and highly reliable method, and energy saving is achieved by minimizing the input of equipment during normal operation. be able to.

1 is a cross-sectional view of an outdoor unit of an air conditioner according to Embodiment 1 of the present invention. The longitudinal cross-sectional view which shows the principal part of the outdoor unit in the same Embodiment 1 The figure which shows the principal part of the air blower at the time of the external wind in the same Embodiment 1, and a blowing grille Sectional drawing which shows the principal part of the blowing grill in Embodiment 1 The figure which shows the principal part of the air blower at the time of the external wind in the same Embodiment 2, and a blowing grille Sectional drawing which shows the principal part of the blowing grill in Embodiment 2 The figure which shows the principal part of the air blower at the time of the external wind in the same Embodiment 3, and a blowing grille Sectional drawing which shows the principal part of the blowing grill in Embodiment 3 External view of conventional outdoor unit

  1st invention is equipped with the air blower provided in the housing | casing, the heat exchanger provided in the back side of the air blower, and the blowing grill provided in the front side of the air blower, An outdoor unit of a refrigeration apparatus having a structure that increases ventilation resistance when air flows in.

  With this configuration, when the outside wind is strong, such as a typhoon, the airflow resistance of the air path inside the outdoor unit is increased by the structure provided in the blow-out grill, and the reverse rotation speed of the blower is suppressed. In addition, when an air conditioner or heat pump type hot water heater with an outdoor unit installed is normally operated, and the airflow flowing from the air intake side of the heat exchanger passes through the outdoor unit in a normal wind by the blower, The provided structure is variable so as to keep the draft resistance low.

  As a result, the outdoor unit configured as described above can prevent the rotational speed of the reverse rotation of the blower from becoming very large when the outside wind is strong, and keeps the air path resistance of the outdoor unit small during a normal wind. It is possible to suppress the motor input at the time of generating the air volume as small as possible, and to suppress an increase in blowing noise due to an increase in the air path resistance.

  According to a second aspect of the invention, in particular, in the first aspect of the invention, the blow-out grill has a plate at a position facing the hub portion of the fan wheel of the blower, and the structure can rotate around a pin fixed to the plate. It has a flap and the elastic body which connects a plate and a rotation flap.

  With this configuration, when the outside wind is strong, such as a typhoon, the airflow that collides with the plate of the blowout grill from the outside of the casing flows almost radially outward, opens the rotating flap to the outside, and passes the normal airflow of the blowout grille. By closing the part, the backflow inflow into the outdoor unit is suppressed, and the rotation speed of the blower in the reverse direction is suppressed. In addition, when an air conditioner or a heat pump type water heater with an outdoor unit is normally operated, and the airflow flowing from the air suction side of the heat exchanger passes through the outdoor unit in a normal wind by the blower, Since the force opposite to the direction of contraction does not work, the predetermined elastic force of the spring moves the rotating flap in the direction of closing to the inner peripheral side, and it is stored on the inner peripheral side of the outer periphery of the plate. A predetermined amount of air flows through the passage, and the ventilation resistance of the outdoor unit is kept low.

  According to a third aspect of the present invention, particularly in the first aspect, the blow-out grill has a plate at a position facing the hub part of the impeller of the blower, and the structure is rotatable around a pin fixed to the plate. A first rotation flap, a first elastic body connecting the plate and the first rotation flap, a second rotation flap rotatable around a pin fixed to the first rotation flap, and a first rotation It has a 2nd elastic body which connects a flap and a 2nd rotation flap.

  With such a configuration, when the outside wind is strong, such as a typhoon, the first rotating flap and the second rotating flap open to the outer peripheral side with the wind speed of the reverse wind. Furthermore, the second flap and the outer peripheral side can be expanded in two stages. The higher the reverse wind speed, the more the area where the air flow passage part of the blowout grill is blocked increases the reverse wind inflow into the outdoor unit and the reverse rotation of the blower The number of rotations can be reduced further.

  In the fourth invention, in particular, a ring plate having a hole in the center is added to the outside of the plate of the second or third invention.

  By adopting such a configuration, when an outside wind such as a typhoon is strong, a high-speed air flow entering from the center of the ring plate surely flows radially, and the rotating flap can be surely spread outward.

  As a result, with an inexpensive structure, the normal airflow passage portion of the blow-out grill is surely blocked, the backflow into the outdoor unit is suppressed, and the reverse rotation speed of the blower is suppressed.

  5th invention is the outdoor unit of the freezing apparatus of any one of 1st-4th invention used for a separate type air conditioner provided with at least 1 or more indoor units.

  By adopting such a configuration, the air conditioner of the present invention is configured such that when the outside wind is strong such as a typhoon, the blade of the blower itself or the reverse rotation of the motor accompanying the reverse rotation of the blower when the blower is an inverter drive type The problem of electrical components such as inverters being damaged by the back electromotive force generated by a low-cost and reliable method is prevented, and the input of equipment is kept as small as possible while maintaining the prescribed air-conditioning performance during normal operation. Thus, energy saving can be achieved.

  6th invention is the outdoor unit of the freezing apparatus of any one of 1st-4th invention used for a heat pump type hot water heater.

  By adopting such a configuration, the heat pump water heater of the present invention is configured such that when the outside wind is strong such as a typhoon, the blade of the blower itself or the reverse rotation of the motor accompanying the reverse rotation of the blower when the blower is an inverter drive type Prevents the problem of electrical components such as inverters from being damaged by the back electromotive force generated by a low-cost and highly reliable method, and keeps the heating and hot water supply performance of the specified heat pump during normal operation. Can be made as small as possible to save energy.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a cross-sectional view of an outdoor unit of an air conditioner according to Embodiment 1 of the present invention. FIG. 2 is a longitudinal sectional view of the outdoor unit showing the main part in the first embodiment. FIG. 3 is a view showing a blower and a blow grill of an outdoor unit in an outdoor wind showing the main part in the first embodiment. 4 is a cross-sectional view taken along the line AA in FIG. 3. FIG. 4 (a) is a view showing the main part of the blow grill when the wind is outside, and FIG. 4 (b) is a view showing the main part of the blow grill when the wind is normal. It is.

  A separate-type air conditioner composed of at least one indoor unit and an outdoor unit connects an indoor unit installed in a room such as a living room and an outdoor unit installed outdoors by a connecting pipe, and heats the outdoor unit. The cooling / heating of the room is performed by performing heat dissipation / heat absorption in the exchanger and heat absorption / heat dissipation in the heat exchanger of the indoor unit through the refrigerant.

  As shown in FIG. 1, an outdoor unit 1 x of a separate type air conditioner is provided in a housing 1, a compressor 2 provided in the housing 1, and a suction side opening 1 a in the housing 1. A heat exchanger 3, a blower 6 composed of an impeller 4 and an orifice 5 provided on the surface opposite to the air suction side 3 a of the heat exchanger 3 in the housing 1, a motor 7 for driving the blower 6, The motor 1 is supported in the housing 1 and is composed of a motor support 8 disposed on the suction side of the blower 6 and a blow grill 9 provided on the discharge side of the blower 6. The outdoor unit 1x may include a four-way valve, an expansion valve, and an accumulator (not shown).

  Moreover, as shown in FIGS. 1-4, the blowing grille 9 includes a plurality of substantially radial bars 10 and a plurality of substantially circumferential bars (not shown) disposed so as to intersect the radial bars. And a plate 11 provided at a position facing the hub 4 a of the impeller 4. A plurality of substantially radial bars 10 are fixed to the plate 11. As shown in FIG. 4, the plate 11 has a rotating flap 13 that can rotate around a fixed pin 12, and the rotating flap 13 has a spring 14 as an elastic body having one end fixed to the plate 11. The other end is attached. As the elastic body, a metal spring, a resin rubber, or the like can be used.

  The operation of the outdoor unit 1x configured as described above will be described below.

  First, the impeller 4 of the blower 6 is rotated by the motor 7, and dynamic pressure and static pressure are applied by the impeller 4 and the orifice 5, and the blower 6 performs a blowing action, and the air suction of the heat exchanger 3 of the housing 1 is performed. The air flowing in from the side 3a passes through the outdoor unit 1x, passes between a plurality of substantially radial bars 10 and a plurality of substantially circumferential bars (hereinafter referred to as airflow passages) of the blowing grill 9, and the outdoor unit Blow out 1x. When passing through the heat exchanger 3, the compressor 2 exchanges heat with a refrigerant sent to a refrigerant pipe (not shown) in the heat exchanger 3 to obtain a predetermined heat exchange capability.

  Here, when the outside wind is strong, such as a typhoon, as shown in FIGS. 2 to 4, the airflow that collided with the plate 11 of the blowing grill 9 from the outside of the housing 1 flows almost radially to the outer peripheral side, and the rotating flap 13. Open outward. And the rotation flap 13 opened outside closes the airflow passage part of the blow-out grill 9, suppresses the backflow inflow into the outdoor unit 1x, and suppresses the rotational speed of the reverse rotation of the blower 6.

  In addition, when the air conditioner incorporating the outdoor unit 1x is normally operated and the airflow flowing from the air suction side 3a of the heat exchanger 3 passes through the outdoor unit 1x in a normal wind by the blower 6, the spring 14 Since the force opposite to the direction of contraction does not act, the predetermined elastic force of the spring 14 moves the rotating flap 13 in the direction to close to the inner peripheral side, and the plate 11 is stored on the inner peripheral side from the outer periphery. For this reason, a predetermined airflow flows without blocking the airflow passage portion of the blowout grill 9, and the ventilation resistance of the outdoor unit 1x is kept low.

  Therefore, as a result, when the outside wind such as a typhoon is strong due to the inexpensive structure of the rotary flap 13 and the spring 14 attached to the pin 12 provided on the plate 11 of the blowout grill 9, the impeller 4 itself of the blower 6, In a case where the blower 6 is an inverter drive type, the problem that electrical components such as an inverter are damaged by a counter electromotive voltage generated by the reverse rotation of the motor 7 accompanying the reverse rotation of the blower 6 is prevented with a highly reliable method. In addition, during normal operation, the input of the outdoor unit 1x of the air conditioner can be reduced as much as possible while maintaining a predetermined air conditioning performance, thereby saving energy.

  In the present embodiment, two rotary flaps 13 are provided on the plate 11, but the same effect can be obtained with one or more than three.

(Embodiment 2)
FIG. 5 is a diagram showing a blower and a blow grill of an outdoor unit during outside wind, showing the main part in Embodiment 2 of the present invention. 6 is a cross-sectional view taken along the line AA in FIG. 5. FIG. 6A is a view showing a main part of the blow grill when the wind is outside, and FIG. 5B is a main part of the blow grill when the wind is normal. FIG. The same constituent elements as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 5 and 6, a ring plate 16 having a hole 15 at the center is added to the outside of the plate 11.

  The operation of the outdoor unit 1x configured as described above will be described below.

  When the outside wind is strong, such as a typhoon, as shown in FIG. 6 (a), the high-speed airflow entering from the hole 15 at the center of the ring plate 16 surely flows radially, and the rotary flap 13 is reliably moved outward. Can be spread.

  As a result, the airflow passage portion of the blow-out grill 9 is reliably blocked with an inexpensive structure, the backflow inflow into the outdoor unit 1x is suppressed, and the reverse rotation speed of the blower 6 is suppressed.

  Moreover, when the airflow which flowed in from the air suction side 3a of the heat exchanger 3 passes the inside of the outdoor unit 1x with a normal wind by the air blower 6, as shown in FIG.6 (b), the rotation flap 13 is set to the inner peripheral side. Since it moves in the closing direction and is stored on the inner peripheral side from the outer periphery of the plate 11, a predetermined airflow flows through the airflow passage portion of the blowout grill 9, and the ventilation resistance of the outdoor unit 1x is kept low.

(Embodiment 3)
FIG. 7 is a diagram showing a blower and a blow grill of an outdoor unit during outside wind, showing the main parts in Embodiment 3 of the present invention. 8 is a cross-sectional view taken along the line AA in FIG. 7. FIG. 8 (a) is a view showing the main part of the blow grill when the wind is outside, and FIG. 8 (b) is the main part of the blow grill when the wind is normal. FIG. The same constituent elements as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 7 and 8, the outdoor unit 1 x of the present embodiment has a plate 11 provided at a position facing the hub 4 a of the impeller 4. The first rotary flap 18 is attached to the other end of a spring 19 as a first elastic body, one end of which is fixed to the plate 11. Furthermore, it has the 2nd rotation flap 21 which can rotate around the pin 20 fixed to the 1st rotation flap 18, and the 2nd rotation flap 21 is the 2nd one end fixed to the 1st rotation flap 18. The other end of the spring 22 as an elastic body is attached.

  The operation of the outdoor unit 1x configured as described above will be described below.

  When the outside wind is strong, such as a typhoon, as shown in FIG. 8A, the first rotating flap 18 and the second rotating flap 21 open to the outer peripheral side with the wind speed of the outside wind. As the wind speed increases, the first rotating flap 18 and the second rotating flap 21 and the outer peripheral side can be spread in two stages, and the normal airflow passage portion of the blowing grill 9 is blocked.

  As a result, as the outside wind speed increases, the area where the airflow passage portion of the blowout grill 9 is blocked increases, the backflow into the outdoor unit 1x is suppressed, and the reverse rotation speed of the blower 6 can be further reduced.

  In addition, when the airflow flowing in from the air suction side 3a of the heat exchanger 3 passes through the outdoor unit 1x with normal wind by the blower 6, as shown in FIG. 8B, the first rotary flap 18, 2, the rotary flap 21 moves in the direction of closing to the inner peripheral side and is housed on the inner peripheral side from the outer periphery of the plate 11, so that a predetermined airflow flows through the normal airflow passage portion of the blowout grill 9 and the ventilation of the outdoor unit 1 x Keep resistance low.

  In the above embodiment, the outdoor unit of the air conditioner has been described as an example. However, a heat pump type hot water heater comprising an outdoor unit that heats water with a refrigerant and a tank unit that stores hot water generated by the outdoor unit. The same effect can be obtained by providing the outdoor unit.

  As described above, the outdoor unit having the configuration according to the present invention has high reliability that the rotational speed of the reverse rotation of the blower becomes very large when the outside wind is strong due to the inexpensive structure provided in the blowout grill. In the case of normal wind, the air path resistance in the outdoor unit can be suppressed to a small value, and the motor input when the predetermined air volume is output can be suppressed as much as possible.

  Therefore, it can be applied not only to a separate outdoor unit of a domestic air conditioner and an outdoor unit of a heat pump type hot water heater, but also to a use such as a commercial air conditioner, a hot water heater, or a commercial refrigeration apparatus.

DESCRIPTION OF SYMBOLS 1x Outdoor unit 1 Case 2 Compressor 3 Heat exchanger 6 Blower 7 Motor 8 Motor support base 9 Outlet grill 10 Substantially radial cross 11 Plate 12, 17, 20 Pin 13 Rotating flap 14, 19, 22 Spring 15 Hole 16 Ring plate 18 First rotating flap 21 Second rotating flap

Claims (6)

A blower provided in the housing, a heat exchanger provided on the back side of the blower, and a blowout grill provided on the front side of the blower, wherein the blowout grill is provided with air from the blowout grille. An outdoor unit of a refrigeration apparatus having a structure that increases ventilation resistance when flowing in. The blow-out grill has a plate at a position facing a hub portion of an impeller of the blower, and the structure has a rotating flap that can rotate around a pin fixed to the plate, the plate, and the rotating flap. The outdoor unit of the refrigeration apparatus according to claim 1, further comprising: an elastic body that couples to each other. The blow-out grill has a plate at a position facing the hub portion of the impeller of the blower, and the structure has a first rotating flap that can rotate around a pin fixed to the plate, the plate, A first elastic body connecting the first rotation flap, a second rotation flap rotatable around a pin fixed to the first rotation flap, the first rotation flap and the second The outdoor unit of the refrigeration apparatus according to claim 1, further comprising: a second elastic body that couples the rotary flap of the refrigeration apparatus. The outdoor unit of the refrigeration apparatus according to claim 2 or 3, wherein a ring plate having a hole in the center is added to the outside of the plate. The outdoor unit of the refrigeration apparatus according to any one of claims 1 to 4, which is used for a separate type air conditioner including at least one indoor unit. The outdoor unit of the freezing apparatus of any one of Claims 1-4 used for a heat pump type hot water heater.

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