JP4323019B2 - Air conditioner indoor unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an indoor unit in an air conditioner composed of an outdoor unit and an indoor unit.
[0002]
[Prior art]
The indoor unit of the air conditioner accommodates a heat exchanger and a blower in the unit body, sucks room air into the unit body by operating the blower, passes the heat exchanger, exchanges heat, and further passes through the blower. And blow out indoors.
[0003]
On the other hand, Japanese Utility Model Laid-Open No. 62-124421 and Japanese Patent Application Laid-Open No. 11-72240 disclose an air conditioner incorporating a negative ion generator, which supplies negative ions directly or with heat-exchanged air into the room. . It is known that this negative ion is absorbed by the human body, thereby activating cellular tissues, promoting waste discharge, and improving metabolism.
[0004]
[Problems to be solved by the invention]
However, the above publication only describes the arrangement of the electrode part of the negative ion generator in the vicinity of or in the air passage, and the details are unknown.
[0005]
For example, if the electrode part is disposed in the vicinity of the blower fan, the negative ions released from the electrode part are absorbed by the surrounding structure, and the amount of the generated ion varies and becomes unstable.
[0006]
In addition, it is conceivable to ground the device in order to increase the potential difference with the electrode part, but if a spark discharge is made close to the distance between the electrode part and the grounding terminal, the amount of negative ions generated increases, but on the human body. Generation of harmful ozone is observed.
[0007]
In addition, if the electrode part is disposed in a portion other than the air passage without the wind speed, the amount of negative ions generated is small, and it is necessary to make the output voltage extremely high to compensate for this, leading to an increase in running cost.
[0008]
The present invention has been made by paying attention to the above circumstances, and the purpose of the present invention is to provide an efficient heat exchange effect of indoor air on the premise that a negative ion generation means is provided in addition to a heat exchanger and a blower. It is intended to provide an indoor unit of an air conditioner that can supply a good negative ion.
[0009]
[Means for Solving the Problems]
In order to satisfy the above object, the present invention accommodates a heat exchanger and a blower in a unit body, sucks room air into the unit body, exchanges heat with the heat exchanger, and blows out the room through the blower. In an indoor unit of an air conditioner, a negative ion generator is disposed in the vicinity of the outlet of the blower air passage of the blower and attached to the top wall of the negative air generator to supply negative ions to the room. Is provided in a protective container, and is provided with a ground portion at a position separated from the generating electrode exposed in the air passage and the generating electrode. The generating electrode is integrated with an electrode plate to which a high voltage is applied and the electrode plate. It consists of a plurality of needle-shaped electrodes that are molded and arranged on the downstream side of the airflow of the electrode plate, parallel to the airflow direction of the airflow path and arranged in parallel with each other so that the tip faces the lower side of the airflow. The surface of the container is subjected to antistatic treatment, and further, an arc discharge is not generated with respect to the generating electrode on the air blast side of the generating electrode and a slit that opens along the air blowing direction of the air blowing path at a portion facing the tip of each needle electrode. A boss part is provided integrally on the surface at a position away from the extension line of the tip of the generating electrode at a distance, and a lower hole is provided through the upper and lower ends of the boss part. A fixture with a length shorter than the total length of the pilot hole is attached, and a ground terminal for connecting a ground wire is interposed between the fixture head and the upper end surface of the boss. The ground wire is connected via
[0021]
By adopting means for solving the above problems , efficient air conditioning and negative ion supply can be performed.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the indoor unit of an air conditioner is comprised.
The unit main body 1 includes a front panel 2, an upper panel 3, and a rear plate 4 integrally provided with both side portions, a rear portion, and a bottom portion, and is formed in a horizontally long box shape.
[0023]
In the unit main body 1, an indoor heat exchanger 5 formed in a substantially inverted V shape in a side view is disposed. This indoor heat exchanger 5 is composed of a front heat exchanger portion 5a located on the front side and a rear heat exchanger portion 5b located on the back side, and particularly on the upper surface of the rear heat exchanger portion 5b. Auxiliary heat exchangers 5c are disposed along the pipes, and these are connected in series via pipes.
[0024]
A front drain pan 6a is disposed below the front heat exchanger section 5a, and a rear drain pan 6b is disposed below the rear heat exchanger section 5b. These front and rear drain pans 6 a and 6 b are integrally provided on the rear plate 4.
[0025]
Between the front side heat exchanger part 5a and the rear side heat exchanger part 5b which are the internal positions of the said indoor heat exchanger 5, the indoor air blower 7 provided with the crossflow fan is arrange | positioned. The rear plate 4 is bent from the back surface side to the bottom surface portion of the indoor blower 7 which is the lower portion of the rear drain pan 6b, and the air passage 8 is formed between the lower surface portion of the front drain pan 6a and its extended portion. .
[0026]
A blowout port 9 is provided in the lower part of the front panel 2 forming the tip of the air passage 8 and along the width direction. The air outlet 9 includes a combination of a plurality of vertical and horizontal louvers, and is provided with a wind direction guide portion 10 that automatically changes the air direction from the air outlet 9.
[0027]
On the other hand, a frame-like crosspiece is fitted into the upper panel 3, and this space portion is formed as an upper suction port 11. The front panel 2 is provided with front suction ports 12a and 12b having different structures in two stages of the upper side and the lower side, and has a hinge structure (not shown) along the upper edge so that it can be opened and closed with respect to the unit body 1. Make a suction grill. The front panel 2 has an R-shaped cross section so as to have a predetermined gap from the front heat exchanger portion 5a of the indoor heat exchanger 5.
[0028]
An air purifier 13 that is an air purifying means is disposed at a position close to the upper part on the front side of the front heat exchanger portion 5a facing the front suction port 12a of the front panel 2. That is, the air cleaner 13 is located in the space between the front heat exchanger portion 5a and the front panel 2.
[0029]
This air cleaner 13 is composed of an electrostatic precipitator 13A for the purpose of removing indoor dust, dust, and water vapor, and a high-performance deodorizing filter having a honeycomb activated carbon structure (not shown) for the purpose of removing indoor odors. It is arranged side by side on the above site.
[0030]
The electric dust collector 13A will be described in detail. As shown in FIG. 2A, the electric dust collector 13A includes a positive potential charging electrode (ionizer portion) 14 and a negative potential dust collection electrode (collector portion) 15.
[0031]
The charged electrode 14 applies a high DC voltage between the discharge electrode 14a called the ionization line and the counter electrode 14b to cause corona discharge, and ionizes dust particles. The dust collecting electrode 15 is formed by laminating sheets 15a each having a conductive electrode on one side, suctioning ionized dust / dust with a Coulomb force generated between the sheets by alternately applying +-charges. Corrugated electrode.
[0032]
In addition, there is a certain amount of heat radiation from each of the electrodes 14 and 15 due to such dust collecting action, and water vapor contained in the air together with dust and dust evaporates when passing through the electric dust collector 13A.
[0033]
As shown in FIG. 1 again, a handle portion a is integrally provided on the lower side of the electrostatic precipitator 13A, and can be freely detached from the unit body 1 by opening the front panel 2 on the user side. Maintenance for removing dust and dirt adhering to the dust collecting electrode 15 can be performed.
[0034]
Further, a filter 16 is detachably attached to a space surrounded by the handle portion a of the electrostatic precipitator 13A, the lower front surface of the front heat exchanger portion 5a and the front panel 2, and the attached dust / Maintenance to remove dust can be performed.
[0035]
On the other hand, a negative ion generator 17 which is a negative ion generator is disposed in the air passage 8. The negative ion generator 17 is provided at a portion extending from the lower surface portion of the front drain pan 6a of the air passage 8 to the air outlet 9 side through which the air passing through the electrostatic precipitator 13A passes, and provided at one side portion of the air outlet 9. It has been.
[0036]
As shown in FIG. 2 (A) again, the basic configuration of the negative ion generator 17 is that the electrode plate 20 to which a high voltage is applied and the negative ions are radiated from the tip of the electrode plate 20 integrally projecting from the side surface. A negative ion generating electrode 22 composed of a needle-like electrode 21 and a protective container 23 (indicated by a one-dot chain line) for storing and protecting the generating electrode 22.
[0037]
In order to emit a larger amount of negative ions in the negative ion generator 17, it is necessary to increase the potential difference between the tip of the needle electrode 21 and the periphery of the tip. Therefore, a ground portion E is provided in the vicinity of the tip of the needle-like electrode 21 of the protective container 23 as will be described later, and the protective container 23 is grounded via the mounting screw 24 and the ground wire 25, so that the tip of the needle-like electrode 21 is provided. The potential difference is secured.
[0038]
For example, if the negative ion generator 17 is disposed in the very vicinity of the indoor blower 7 described above, the released negative ions are absorbed by the nose or casing forming the blower passage 8 and released into the indoor space. The amount is greatly reduced. For this reason, the generator 17 is disposed at the outlet 9 and radiates through the vertical and horizontal louvers of the wind direction guide unit 10.
[0039]
Further, the needle-like electrode 21 protruding from the electrode plate 20 is arranged with the tip thereof directed from the upstream side to the downstream side of the air passage 8, and the ground terminal 24 is attached to the downstream side of the needle-like electrode 21.
[0040]
For example, as shown in FIG. 2 (B), when the tip of the needle electrode 21 is reversed and the ground terminal 24 is mounted on the upstream side of the air flow so as to face this, negative ions emitted from the tip of the needle electrode 21 Is almost absorbed by the electrode plate 20 due to the air flow, and the amount released to the indoor space is reduced, so this configuration is not adopted.
[0041]
Further, a specific configuration of the negative ion generator 17 will be described with reference to FIGS.
The negative ion generator 17 includes the generating electrode 22 housed in a protective container 23. The protective container 23 has an open upper surface in the figure, and a flange 23a is integrally provided along the opening edge to form a substantially rectangular box shape. The entire surface is subjected to predetermined antistatic treatment. . A hooking claw 23b is integrally provided on the left and right collar portions 23a, and can be attached to and detached from the mounting portion described above with one touch.
[0042]
The ground portion E is provided in the central portion on the front side of the protective container 23. That is, a boss portion 23c is integrally provided at the center of the flange portion 23a from the upper surface to the middle portion of the side wall of the container. A lower hole 27 is provided so as to penetrate from the upper end to the lower end of the boss portion 23c, and the mounting screw 24 is screwed from above. A ground terminal 28 is interposed and fixed between the head of the mounting screw 24 and the upper end surface of the protective container 23, and the ground wire 25 is connected to the ground terminal 28.
[0043]
The total length of the mounting screw 24 is selected to be shorter than the total length of the boss portion 23c. Therefore, the lower end of the mounting screw 24 does not protrude from the lower end of the boss portion 23c. Furthermore, a pair of slits 30 and 30 are opened in the protective container 23. These slits 30 are located on the left and right sides of the boss portion 23c of the protective container 23, and are provided over the entire lower surface and part of the front and rear surfaces, and are parallel to each other.
[0044]
A support leg 31 is integrally provided upright from, for example, the bottom of the protective container 23, and an attachment screw 34 for attaching and fixing the high voltage circuit connection terminal 33 to the support leg 31 is screwed from the upper end.
[0045]
A high voltage lead wire 32 extends from the high voltage circuit connection terminal 33 and is electrically connected to a high voltage circuit in an electrical component box 35 provided on one side of the unit body 1. The high voltage circuit connection terminal 33 extends to the left and right, and the electrode plate 20 described above is integrally provided at both the left and right ends.
[0046]
Since the needle-like electrodes 21 project from the respective electrode plates 20, the needle-like electrodes 21 have a pair of left and right, and their tips are opposed to the pair of slits 30. Therefore, the generating electrode 22 including the two sets of electrode plates 20 and 20 and the needle-like electrodes 21 and 21 is accommodated in the protective container 23.
[0047]
By attaching the protective container 23 containing the negative ion generating electrode 22 to a predetermined position of the outlet 9, the slit 30 of the protective container 23 extends along the blowing direction, and the pair of needle-like electrodes 21 extends in the blowing direction. It faces in parallel, and the front end faces the indoor space via the outlet 9 on the downstream side. The electrode plate 20 on which the needle-like electrode 21 is projected is located on the upstream side of the airflow from the needle-like electrode 21.
[0048]
The ground portion E provided in the protective container 23 is located away from the negative ion generating electrode 22. The ground portion E is separated from the negative ion generating electrode 22 by a distance (for example, about 5 mm at −5000V) at which no arc discharge is generated. In addition, the ground portion E is located at a position deviated from the tip extension line of the negative ion generating electrode 22 and is provided on the lower side of the blowing air.
[0049]
In particular, as shown in FIG. 1 and FIG. 5, a guard portion composed of a plurality of protrusions is provided at a portion facing the generator 17 at the end of the top wall of the air outlet 9 to which the negative ion generator 17 is attached. 40 is provided to shield the negative ion generator 17 from the outlet 9 and prevent foreign matter from being inserted.
[0050]
When the operation start button of a remote controller (not shown) is pressed in the air conditioner indoor unit configured as described above, the refrigeration cycle operation for the indoor heat exchanger 5 and the drive of the indoor blower 7 are started.
[0051]
The room air is sucked into the unit body 1 from the front panel (suction grill) 2 of the unit body 1 and the suction ports 12 a, 12 b, 11 of the top panel 3. In particular, the room air sucked from the front suction port 12a directly passes through the electrostatic precipitator 13A, and dust, dust, and water vapor contained in the room air are captured and cleaned.
[0052]
The purified air is guided to the indoor heat exchanger 5 to exchange heat, and is further guided to the air passage 8 through the indoor fan 7 and blown out from the outlet 9 into the indoor space. At the same time, the negative ion generator 17 provided at the outlet 9 acts to radiate negative ions and supply them to the indoor space.
[0053]
Since the heat-exchanged clean air blown out from the outlet 9 does not contain any dust, dust, or water vapor that attenuates negative ions, the negative ions emitted from the generator 17 are not attenuated and enter the room as they are. Supplied.
[0054]
In this way, the indoor air circulates through the above path, and is guided to the electric dust collector 13A, the indoor heat exchanger 5, and the negative ion generator 17 in the indoor unit, thereby purifying the air and desired air conditioning. Both negative ions that have a positive effect on the human body can be supplied efficiently.
[0055]
Further, since the negative ion generator 17 accommodates the generation electrode 22 in the protective container 23, the mounting position of the generation electrode 22 is fixed. And since the generation | occurrence | production electrode 22 can be installed by attaching the protection container 23 to the predetermined site | part of the ventilation path 8, mounting property is good.
[0056]
The generating electrode 22 includes an electrode plate 20 and a needle-like electrode 21. The needle-like electrode 21 is accommodated in the protective container 23 so that the tip of the needle-like electrode 21 is parallel to the air blowing direction of the air blowing path 8 and the tip is directed to the air blowing downstream side. Therefore, the needle-like electrode 21 emits negative ions in the air blowing direction, and these negative ions are sent to the room on the heat-exchanged wind and are effectively supplied.
[0057]
Here, since the pair of needle-like electrodes 21 and 21 are arranged in parallel to each other, negative ions are simultaneously emitted from each needle-like electrode 21 and a large amount of negative ions is always supplied into the room.
[0058]
Further, since the needle electrode 21 is integrated with the electrode plate 20, the needle electrode 21 can be securely fixed in the protective container 23, and the electrode plate 20 is disposed on the upstream side of the needle electrode 21. Thus, the position setting of the electrode plate 20 does not affect the generation of negative ions.
[0059]
In addition, since the slit 30 opened in the protective container 23 is provided at a portion facing the tip of the needle electrode 21 and along the blowing direction of the blowing path 8, the inside of the protective container 23 that accommodates the generating electrode 22 is inside. It communicates with the air passage 8 through the slit 30. Therefore, the air to be blown is sent to the periphery of the generating electrode 22 through the slit 30, so that a temperature difference between the inside and outside of the protective container 23 cannot be made, and dew generation in the container 23 and the generating electrode 22 is surely prevented. To do.
[0060]
Further, the ground portion E provided in the protective container 23 is provided at a position separated from the generating electrode 22 accommodated in the protective container 23. That is, when the surface of the protective container 23 is charged with negative ions, the potential difference between the generating electrode 22 and the surroundings decreases, leading to a decrease in negative ion emission. Therefore, by releasing the charge on the surface of the protective container 23 from the ground portion E, a potential difference between the generating electrode 22 and the surrounding area is always ensured, and conditions for easily generating negative ions can be prepared.
[0061]
On the other hand, if the earth portion E is provided at a position that is too close to the generating electrode 22, arc discharge is generated and a spark is generated, which is dangerous and ozone harmful to the human body is generated. Therefore, the ground portion E is provided at a position separated from the generating electrode 22 to discharge the charge on the surface of the protective container 23 and stabilize the emission of negative ions.
[0062]
The ground portion E of the protective container 23 is provided away from the negative ion generating electrode 22 by a distance that does not cause arc discharge. Therefore, there is no generation of sparks due to arc discharge, and the potential difference with the generation electrode 22 can be increased in a state where they are close to each other, and a large amount of negative ions can be emitted.
[0063]
In addition, since the ground portion E of the protective container 23 is provided at a position off the extension of the tip of the negative ion generating electrode 22, negative ions emitted from the tip of the needle electrode 21 are sent to the ground portion E. Discharge can be prevented, and radiation into the room can be performed efficiently.
[0064]
The ground portion E of the protective container 23 is provided on the blast side of the negative ion generating electrode 22. That is, the negative ions emitted from the tip of the needle electrode 21 have the highest potential difference in the vicinity of the ground portion E and can increase the radiation effect. By providing this on the leeward side, the amount of negative ions generated is increased. In addition, radiation into the room is performed efficiently.
[0065]
Further, since the ground portion E of the protective container 23 is formed by connecting the ground wire 25 to the boss portion 23c provided integrally with the surface of the protective container 23 via the mounting screw 24, the boss portion 23c is for protection. It is integral with the container 23 and can be securely grounded by attaching a screw 24 thereto.
[0066]
In addition, a lower hole 27 is provided in the boss portion 23c, and a mounting screw 24 having a shorter length than the boss portion 23c is attached to the lower hole 27 and the ground wire 25 is connected. There is no abnormal discharge with the mounting screw 24. In addition, the generation electrode 22 is affected by the tip of the mounting screw 24 in the lower hole 27, and the amount of negative ions generated increases, and efficiently radiates toward the outlet 9 in the direction of the boss portion 23c.
[0067]
Further, since the entire surface of the protective container 23 is subjected to antistatic treatment, the protective container 23 is prevented from being charged, a potential difference between the generating electrode 22 and the surroundings is always secured, and negative ions are likely to be generated. It is arranged and negative ions can be stably emitted.
[0068]
Further, since the protective container 23 is mounted on the upper surface wall in the vicinity of the air outlet 9 forming the air passage 8 so that the generating electrode 22 is exposed to the air passage 8, the protective container 23 is securely attached and minus. Ions are reliably supplied into the chamber.
[0070]
【The invention's effect】
As described above, according to the present invention, on the premise that the negative ion generating means is provided in addition to the heat exchanger and the blower, there is an effect that an efficient negative ion supply can be performed together with the heat exchange action of the indoor air. .
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an indoor unit of an air conditioner according to an embodiment of the present invention.
FIGS. 2A and 2B are diagrams illustrating the components housed in the indoor unit of the air conditioner according to the embodiment, the operation thereof, and the configurations not employed. FIGS.
FIG. 3 is a perspective view of a negative ion generator according to the embodiment.
FIG. 4 is a cross-sectional view of the negative ion generator according to the embodiment.
FIG. 5 is a top view of a negative ion generator and its peripheral part according to the embodiment.
[Explanation of symbols]
1 ... Unit body,
5 ... Indoor heat exchanger,
7 ... indoor fan,
17 ... Negative ion generator,
23 ... Protective container,
22 ... generating electrode,
20 ... Electrode plate,
21 ... acicular electrode,
30 ... Slit,
E ... Earth part,
23c ... Boss part,
24. Mounting tool (mounting screw),
25 ... Earth wire,
28: Earth terminal.

Claims (1)

In an indoor unit of an air conditioner that houses a heat exchanger and a blower in the unit body, sucks indoor air into the unit body, exchanges heat with the heat exchanger, and blows out indoors through the blower,
A negative ion generator that is attached to the upper surface wall in the vicinity of the air outlet in the air passage of the blower and generates negative ions and supplies the negative ions to the room is disposed.
This negative ion generator
A generating electrode that is housed in a protective container and exposed in the air passage, and a grounding portion at a position separated from the generating electrode,
The generating electrode is integrally formed with the electrode plate to which a high voltage is applied, and is disposed on the air blowing downstream side of the electrode plate, and is parallel to the air blowing direction of the air blowing path, and the tip thereof is on the air blowing downstream side. Consisting of a plurality of needle-like electrodes arranged in parallel to each other,
The protective container has an antistatic treatment on its surface,
Furthermore, the protective container has a slit that opens at the tip of each acicular electrode and a portion that is open along the blowing direction of the air passage, and an arc discharge is generated with respect to the generating electrode on the blast side of the generating electrode. With a boss part that is integrally provided on the surface at a position that is off the extension line of the tip of the generating electrode,
A pilot hole is provided through the upper and lower ends of the boss part, and a fixture having a length shorter than the total length of the pilot hole is attached from the upper end of the boss part to the pilot hole. An earth terminal that connects the ground wire is interposed between the upper end surface of the unit,
The indoor unit of an air conditioner , wherein the ground part is formed by connecting the ground wire to the boss part via the fixture .

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