JP3836087B2 - Outdoor unit and air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an outdoor unit and an air conditioner that provide a comfortable indoor environment by heating or cooling.
[0002]
[Prior art]
An air conditioner is composed of two large components, an indoor unit and an outdoor unit. Each of these units includes an indoor heat exchanger and an outdoor heat exchanger that perform heat exchange between the refrigerant and the indoor air and between the refrigerant and the outdoor air.
[0003]
These indoor heat exchangers and outdoor heat exchangers are elements constituting a refrigerant circuit by adding other elements such as a compressor and an expansion valve. Refrigerant physically circulates in this circuit, and it will also follow the state change circulation process of high-temperature high-pressure gas, low-temperature low-pressure gas, high-temperature high-pressure liquid, and low-temperature low-pressure liquid, and realize indoor air conditioning. . The indoor air conditioning is directly realized by heat exchange between the refrigerant in the indoor heat exchanger and the room air.
[0004]
Incidentally, at the time of heating operation, it is realized by sending a refrigerant made into a high-temperature and high-pressure gas by a compressor to the indoor heat exchanger, exchanging heat with the indoor air, and condensing and liquefying it. Also, during cooling operation, high-temperature and high-pressure gas refrigerant is sent to the outdoor heat exchanger to exchange heat with outdoor air to condense into high-temperature and high-pressure liquid refrigerant. This is realized by sending it to the indoor heat exchanger as a liquid refrigerant and evaporating and vaporizing it by exchanging heat with the room air.
[0005]
[Problems to be solved by the invention]
An air conditioner that uses inverter control has been announced and shows good sales. This is because by adopting inverter control, high air-conditioning capacity can be obtained and power saving can be achieved. A coil (reactance element) is indispensable for inverter control. Conventionally, the coil type is generally used as the coil, but in recent years, the PAM type which enables higher-level control has been adopted. By the way, although the PAM type coil is screwed to the chassis constituting the outdoor unit control unit, it generates a slight electromagnetic vibration during operation, and thus the chassis may be vibrated to generate a slight noise. Such an abnormal noise is not so much anxious because it is emitted from the outdoor unit, but in recent years, consumer demands have become stricter, and the outdoor unit is also required to be quiet.
[0006]
This invention is made | formed in view of said situation, and aims at improving the silence of an outdoor unit.
[0007]
[Means for Solving the Problems]
As means for solving the above-described problems, an outdoor unit and an air conditioner having the following configurations are employed. That is, the outdoor unit according to claim 1 includes an outdoor heat exchanger that performs heat exchange between outdoor air and a refrigerant, a compressor that sends the refrigerant to the heat exchanger, and a drive motor that drives the compressor. An outdoor unit control unit including a reactance element for inverter control, wherein the reactance element is attached to a chassis serving as a substrate of the outdoor unit control unit via a vibration-proof rubber base. The pedestal is provided with a protrusion, and the chassis is provided with a fitting hole for positioning the pedestal by fitting the protrusion, and the protrusion has a bulging portion at the tip of the shaft portion. The fitting hole is continuously provided with a diameter-enlarged portion that allows passage of the bulging portion and a diameter-reduced portion that does not allow passage of the bulging portion. After inserting from the diameter part, to the reduced diameter part side Characterized by fixing the pedestal to the chassis bulges is moving by engaged in the fitting hole.
[0008]
In the outdoor unit described above, the reactance element is attached to the chassis via a base made of anti-vibration rubber, so that the electromagnetic vibration generated in the reactance element is difficult to be transmitted to the chassis, and the chassis vibrates even if the reactance element vibrates. Disappear. Thereby, generation | occurrence | production of the abnormal noise which arises when a chassis vibrates is prevented.
[0010]
In the outdoor unit, the pedestal attached to the reactance element is screwed to the chassis at a position where it does not contact the reactance element, so that the transmission path of electromagnetic vibration generated in the reactance element to the chassis is made of vibration-proof rubber. Only the pedestal, and higher vibration isolation performance is demonstrated.
[0012]
In the outdoor unit, the pedestal side protrusion is fitted into the fitting hole on the chassis side, so that the pedestal is positioned with respect to the chassis and the pedestal is prevented from shifting in the surface direction of the chassis. It can be more firmly fixed to the chassis.
[0014]
In the outdoor unit, by locking the pedestal side protrusion to the chassis side fitting hole, the pedestal is positioned with respect to the chassis, and the pedestal is locked to the chassis by the bulging portion. Since the pedestal is prevented from shifting in the thickness direction, the chassis can be more firmly fixed to the reactance element.
[0015]
The outdoor unit according to claim 2 is the outdoor unit according to claim 1 , wherein when the protrusion is inserted into the bulging portion and then moved toward the reduced diameter portion, the back surface of the chassis is A press-contact portion to be press-contacted is provided.
[0016]
In the above air conditioner, the pressure contact portion provided at the bulging portion at the tip of the protrusion is pressed against the rear surface of the chassis, so that the protrusion is prevented from being detached from the fitting hole, and the pedestal in the thickness direction of the chassis. Therefore, the reactance element can be prevented from rattling.
[0017]
An air conditioner according to a third aspect includes the outdoor unit according to the first and second aspects, an indoor heat exchanger that performs heat exchange between indoor air and a refrigerant, and an indoor fan that circulates the indoor air. It is characterized by comprising an indoor unit.
[0018]
In the air conditioner, it is possible to improve the efficiency in assembling the outdoor unit, reduce the manufacturing cost, and improve the silence and maintainability of the outdoor unit.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of an indoor unit and an air conditioner according to the present invention will be described with reference to FIGS. 1 to 3.
FIG. 1 is an explanatory diagram showing the overall configuration of the air conditioner. The air conditioner includes an indoor unit 10 and an outdoor unit 20. The indoor unit 10 and the outdoor unit 20 are connected to each other by a refrigerant pipe 40 through which a refrigerant conducts, electric wiring (not shown), and the like. Two refrigerant pipes 40 are provided, and the refrigerant flows from the indoor unit 10 to the outdoor unit 20 on one side and from the outdoor unit 20 to the indoor unit 10 on the other side.
[0020]
The indoor unit 10 includes a base 11 and a front panel 12 that are integrally formed. The base 11 includes various devices such as a plate fin & tube type indoor heat exchanger 13 and a substantially cylindrical cross flow fan (indoor fan) 14. The base 11 is provided with an indoor unit controller 15 composed of various electric circuit elements in order to perform various operation control and the like related to the other indoor unit 10. The indoor unit control unit 15 is provided with an appropriate indicator 15a for displaying an operation status and an error mode. The indicator 15a can be confirmed from the outside by a see-through portion 12a provided on the front panel 12. A mounting plate 16 is provided behind the base 11 so that the indoor unit 10 can be installed on an indoor wall or the like.
[0021]
The front panel 12 has suction grilles (suction ports) 12b formed on the front surface and the upper surface, respectively. Indoor air (room air) is sucked into the indoor unit 10 from multiple directions by the suction grill 12b. Incidentally, an air filter 17 is provided behind the suction grill 12b, and functions to remove dust such as sucked air. Further, the front panel 12 is formed with a blower outlet 12c below, from which warmed air or cooled air is blown out. The air suction and air blowing are performed by the rotation of the cross flow fan 14.
[0022]
The indoor unit 10 includes a ventilator that sucks indoor air and discharges the air outside the room. The ventilating apparatus includes a ventilation fan 18 dedicated to ventilation, a ventilation suction port 12 d dedicated to ventilation that opens in the front grill 12, and a ventilation hose 19, and the ventilation suction port 12 d is provided on the suction side of the ventilation fan 18. One end of a ventilation hose 19 is connected to the discharge side of the ventilation fan 18 in communication. During the ventilation operation, indoor air is sucked from the suction port 12d by the operation of the ventilation fan 18, so that the sucked room air is discharged to the outside through the ventilation fan 18 and the ventilation hose 19. The other end of the ventilation hose 19 passes through a sleeve (not shown) provided through the wall where the indoor unit 10 is installed together with the refrigerant pipes 40, 40 covered with the heat insulating material, the electric wiring and the drain hose. Open to the outside.
[0023]
The indoor unit 10 described above includes a remote controller 41 as an operation unit that performs various driving operations. The remote controller 41 is provided with various switches and the like, and can transmit an operation signal of the air conditioner toward a receiving unit (not shown) of the indoor unit control unit 15. The operation of the air conditioner can be partly performed by switches (not shown) provided at appropriate positions in the indoor unit.
[0024]
The outdoor unit 20 includes an outdoor heat exchanger 22, a propeller fan 23, a compressor 24, an outdoor unit controller 25, and the like in a housing 21. The outdoor heat exchanger 22 is configured by a refrigerant pipe having a large number of plate-like fins around it, and is for realizing heat exchange between the refrigerant and the outdoor air. The propeller fan 23 constantly takes new air into the casing 21 by generating an air flow that escapes from the back to the front in the casing 21 to improve the heat exchange efficiency in the outdoor heat exchanger 22. Is provided.
[0025]
A fingered 26 and a fan guard 27 are provided on the back surface of the outdoor unit 20 where the outdoor heat exchanger 22 faces the outside and the front surface where the propeller fan 23 faces the outside, respectively. The fingered 26 is provided so that the plate-like fin is not damaged by an unexpected impact from the outside. Similarly, the fan guard 27 is provided for the purpose of protecting the propeller fan 23 from external impacts.
[0026]
The compressor 24 converts a low-temperature and low-pressure gas refrigerant into a high-temperature and high-pressure gas refrigerant and discharges it, and plays a central role among the components constituting the refrigerant circuit. By the way, the refrigerant circuit is not only the compressor 24 but also the indoor heat exchanger 13, the outdoor heat exchanger 22, the refrigerant pipe 40, the expansion valve, and a four-way valve (an expansion valve and a four-way valve) that defines the flow direction of the refrigerant. The valve is a circuit that circulates the refrigerant between the indoor unit 10 and the outdoor unit 20.
[0027]
The outdoor unit control unit 25 performs operation control and the like related to various devices provided in the propeller fan 23, the compressor 24, and other outdoor units 20, and includes various electric circuit elements.
[0028]
In addition to the above, the outdoor unit 20 is provided with a base 28 for supporting the side panel 21a and avoiding the influence of external vibration and the like. Further, the side surface of the side panel 21a close to the compressor 24 is provided with a detachable maintenance panel 29 for performing maintenance of the compressor 24 and the like.
[0029]
Below, the effect | action of the air conditioner which consists of these structures is divided and demonstrated in each case at the time of heating operation and air_conditionaing | cooling operation.
First, at the time of heating operation, the refrigerant converted into high-temperature and high-pressure gas by the compressor 24 is sent to the indoor heat exchanger 13 of the indoor unit 10 through the refrigerant pipe 40. In the indoor unit 10, heat is given from the high-temperature and high-pressure gaseous refrigerant passing through the indoor heat exchanger 13 to the indoor air taken in from the suction grill 12 b by the cross flow fan 14. Thereby, warm air is blown out from the blower outlet 12c below the front panel 12. At the same time, the high-temperature and high-pressure gaseous refrigerant is condensed and liquefied in the indoor heat exchanger 13 to become a high-temperature and high-pressure liquid refrigerant.
[0030]
The high-temperature and high-pressure liquid refrigerant is reduced in pressure in the process of passing through an expansion valve (not shown) in the outdoor unit 20 again through the refrigerant pipe 40, becomes a low-temperature and low-pressure liquid refrigerant, and is sent to the outdoor heat exchanger 22. In the outdoor unit 20, the low-temperature and low-pressure liquid refrigerant passing through the outdoor heat exchanger 22 takes away heat from new outdoor air taken into the housing 21 by the propeller fan 23. Thereby, the low-temperature and low-pressure liquid refrigerant is evaporated and becomes a low-temperature and low-pressure gas refrigerant. This is sent again to the compressor 24, and the above process is repeated.
[0031]
Next, during the cooling operation, the refrigerant flows in the refrigerant circuit in the opposite direction to the above. That is, the refrigerant converted into a high-temperature and high-pressure gas in the compressor 24 passes through the refrigerant pipe 40 and is sent to the outdoor heat exchanger 22 where heat is given to the outdoor air to condense and liquefy it to form a high-temperature and high-pressure liquid refrigerant. This high-temperature and high-pressure liquid refrigerant is reduced in pressure in the process of passing through an expansion valve (not shown) to become a low-temperature and low-pressure liquid refrigerant, and is again sent to the indoor heat exchanger 13 through the refrigerant pipe 40. Here, the low-temperature and low-pressure liquid refrigerant takes heat from the room air and cools the room air, and the refrigerant itself evaporates and becomes a low-temperature and low-pressure gas refrigerant. This is sent again to the compressor 24, and the above process is repeated.
[0032]
These operations are controlled by the cooperation of the indoor unit controller 15 housed in the indoor unit 10 and the outdoor unit controller 25 housed in the outdoor unit 20.
[0033]
Below, the characteristic part of this invention is demonstrated.
The outdoor unit controller 25 is provided with a PAM type coil (reactance element) 34 necessary for inverter control of a drive motor (not shown) that drives the compressor 24. As shown in FIG. 2, the coil 34 is attached to a chassis 25 c serving as a substrate of the outdoor unit control unit 25 via bases 35 and 35 made of vibration-proof rubber.
[0034]
The pedestal 35 is provided with a bag-like slit portion 35 a that is attached to a fixing seat plate 34 a provided under the coil 34. The pedestal 35 has a slit portion 35a attached to the seat plate 34a, a collared screw 36 passed through a screw hole 35b provided at a position separated from the slit portion 35a, and a position that does not contact the seat plate 34a. Are screwed into female screw holes 25h provided in the chassis 25c.
[0035]
Further, as shown in FIG. 3, a projection 35c is provided on the lower surface of the pedestal 35 that is in contact with the chassis 25c, and the projection 35c is fitted to the chassis 25c so that the coil 34 is connected to the chassis via the pedestal 35. A fitting hole 25d for positioning with respect to 25c is provided.
[0036]
In the air conditioner configured as described above, since the coil 34 is attached to the chassis 25c via the pedestal 35, the electromagnetic vibration generated in the coil 34 is hardly transmitted to the chassis 25c, and even if the coil 34 vibrates. The chassis 25c does not vibrate. Thereby, generation | occurrence | production of the abnormal noise which arises when the chassis 25c vibrates can be prevented.
[0037]
The pedestal 35 attached to the coil 34 is screwed to the chassis 25c at a position where it does not come into contact with the coil 34, so that a transmission path of electromagnetic vibration generated in the coil 34 to the chassis 25c is made of vibration-proof rubber. Only the pedestal 35 is provided, and higher vibration isolation performance is obtained.
[0038]
Further, by fitting the projection 35c on the pedestal 35 side into the fitting hole 25d on the chassis 25c side, the pedestal 35 is positioned with respect to the chassis 25c, and the pedestal 35 is prevented from being displaced in the surface direction of the chassis 25c. The coil 34 can be more firmly fixed to the chassis 25c.
[0039]
By the way, the shapes of the protrusions 35c and the fitting holes 25d are not limited to those described in the above embodiment, and various forms can be implemented. Therefore, another example will be described as a second embodiment with reference to FIG. 4 and FIG.
[0040]
In the present embodiment, as shown in FIG. 4, the protrusion 35d provided on the lower surface of the pedestal 35 has a shape in which a bulging portion 35f is provided at the tip of the shaft portion 35e. Are continuously provided with a diameter-enlarged portion 25f that allows passage of the bulging portion 35f and a diameter-reduced portion 25g that does not allow passage of the bulging portion 35f. Then, when attaching the pedestal 35 to the chassis 25c, as shown in FIG. 5, after the projection 35d is inserted from the enlarged diameter portion 25f, it is moved to the reduced diameter portion 25g side, and the bulging portion 35f is engaged with the fitting hole 25e. The pedestal 35 is fixed to the chassis 25c by being stopped, and the pedestal 35 is further screwed. Further, the bulging portion 35f is provided with a pressure contact portion 35g that is pressed against the back surface of the chassis 25c when the projection 35d is moved to the reduced diameter portion 25g side.
[0041]
In the air conditioner configured as described above, the protrusion 35d on the pedestal 35 side is engaged with the fitting hole 25e on the chassis 25c side, whereby the pedestal 35 is positioned with respect to the chassis 25c and the bulging portion Since the pedestal 35 is locked to the chassis 25c by 35f and the pedestal 35 is prevented from being displaced in the thickness direction of the chassis 25c, the chassis 25c can be more firmly fixed to the coil 34.
[0042]
Further, since the pressure contact portion 35g provided on the bulging portion 35f is pressed against the back surface of the chassis 25c, the protrusion from the fitting hole 25e is prevented from being detached, and the pedestal 35 is displaced in the thickness direction of the chassis 25c. As a result, rattling of the coil 34 can be prevented.
[0043]
【The invention's effect】
As described above, according to the outdoor unit of the first aspect of the present invention, the reactance element such as a coil is attached to the chassis via the base made of the vibration-proof rubber, and the electromagnetic vibration generated in the reactance element is generated in the chassis. Since the chassis does not vibrate even if the reactance element vibrates, the generation of abnormal noise can be prevented.
[0045]
Also , by fitting the pedestal-side protrusion into the chassis-side fitting hole, the pedestal is positioned with respect to the chassis and the pedestal is prevented from shifting in the plane direction of the chassis. Can be fixed to.
[0046]
Furthermore , by locking the pedestal-side protrusion into the chassis-side fitting hole, the pedestal is positioned with respect to the chassis and the pedestal is locked to the chassis by the bulging portion, and the thickness direction of the chassis Since the displacement of the pedestal is prevented, the chassis can be more firmly fixed to the reactance element.
[0047]
According to the outdoor unit of the second aspect, the pressure contact portion provided at the bulging portion at the tip of the protrusion is pressed against the back surface of the chassis, so that the protrusion is prevented from being detached from the fitting hole. Since the pedestal is prevented from shifting in the vertical direction, it is possible to prevent the reactance element from rattling.
[0048]
According to claim 3 the air conditioner according, by providing the outdoor unit according to claim 1, 2, efficiency in assembling operation of the outdoor unit, the manufacturing cost compression, the outdoor unit of quietness and maintainability Improvements can be made.
[Brief description of the drawings]
FIG. 1 is a perspective sectional view showing an overall configuration of an air conditioner, showing a first embodiment according to the present invention.
FIG. 2 is an exploded perspective view showing a structure for fixing a coil of an outdoor unit to a chassis.
FIG. 3 is a side sectional view showing a structure for fixing a coil to a chassis, similar to FIG. 5;
FIG. 4 is a diagram showing a second embodiment according to the present invention, and is a perspective view showing a shape of a protrusion provided on a base and a fitting hole provided in a chassis which form a coil fixing structure.
FIG. 5 is a perspective view showing a structure for fixing a coil to a chassis.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Indoor unit 20 Outdoor unit 21 Housing | casing 21a Side panel 21b Top plate 22 Outdoor heat exchanger 23 Propeller fan 24 Compressor 25 Outdoor unit control part 25c Chassis 26 Fingered 27 Fan guard 29 Expansion valve 34 Coil (Reactance element)
34a Seat plate 35 Base 35a Slit part 35b Screw hole 35c, 35d Projection 35f Swelling part 35g Pressure contact part 36 Screw 40 Refrigerant piping

Claims (3)

An outdoor heat exchanger that exchanges heat between outdoor air and refrigerant, a compressor that sends the refrigerant to the heat exchanger, and a reactance element that performs inverter control of a drive motor that drives the compressor An outdoor unit comprising a unit controller,
The reactance element is attached to a chassis serving as a substrate of the outdoor unit controller via a vibration-proof rubber pedestal, a protrusion is provided on the pedestal, and the protrusion is fitted to the chassis. A fitting hole for positioning the pedestal is provided,
The projection has a shape in which a bulging portion is provided at the tip of the shaft portion, and the fitting hole has a diameter-enlarged portion allowing passage of the bulging portion and a diameter-reducing portion not allowing passage of the bulging portion. And the protrusion is inserted from the enlarged diameter portion, and then moved to the reduced diameter portion side, and the bulging portion is locked to the fitting hole to fix the pedestal to the chassis. A featured outdoor unit. The bulge portion is provided with a pressure contact portion that is pressed against the rear surface of the chassis when the protrusion is inserted from the diameter expansion portion and then moved to the diameter reduction portion side. The outdoor unit according to 1 . The outdoor unit according to claim 1 , and an indoor unit including an indoor heat exchanger that exchanges heat between indoor air and a refrigerant and an indoor fan that circulates indoor air. Air conditioner.

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