JP6988117B2 - Indoor unit of air conditioner - Google Patents

Description

The present invention relates to a floor-standing indoor unit of an air conditioner.

As a floor-standing indoor unit installed on the floor with the wall surface of the room as the back, the air sucked from the suction port formed in the center of the front of the indoor unit body by the upper cross flow fan and the lower cross flow fan. After exchanging heat with the refrigerant of the heat exchanger arranged inside the indoor unit, the air is blown into the room from the upper air outlet formed in the upper part of the front of the indoor unit and the lower air outlet formed in the lower part of the front of the indoor unit. (For example, Patent Document 1).

In such a floor-standing indoor unit, the upper motor for driving the upper cross-flow fan is arranged in the upper part on the left side of the indoor unit, and the lower motor for driving the lower cross-flow fan is arranged in the lower part on the left side of the indoor unit. , An electrical component box is placed between the upper motor and the lower motor. On the other hand, the power terminal block that takes in external power is arranged in the upper part on the right side of the indoor unit, and the piping connection portion that connects the piping of the heat exchanger and the piping of the outdoor unit is arranged in the lower part on the right side of the indoor unit.

In an air conditioner in which one or more indoor units are connected to one outdoor unit, an electronic expansion valve that controls the flow rate of the refrigerant is installed on the outdoor unit side. It can be applied almost as it is.

Japanese Unexamined Patent Publication No. 2008-267656

However, in an air conditioner in which two or more indoor units are connected to one or two or more outdoor units and the refrigerant flow rate is variable control type, it is necessary to arrange an electronic expansion valve in each indoor unit. The electronic expansion valve is arranged at the pipe connection portion on the opposite side of the electrical component box with the heat exchanger in between. For this reason, a special route for routing the expansion valve wiring drawn from the electronic expansion valve to the electrical component box is required, so that a means for guiding the dedicated expansion valve wiring is required.

An object of the present invention is to provide a floor-standing indoor unit that does not require a dedicated component for guiding the expansion valve wiring.

In order to achieve the above object, the invention according to claim 1 is provided with a suction port in the center of the front surface, an upper air outlet in the upper part of the front surface, a lower air outlet in the lower part of the front surface, and a heat exchanger inside. The upper cross-flow fan is arranged in the upper part of the back surface of the heat exchanger, and the lower cross-flow fan is arranged in the lower part of the back surface of the heat exchanger. An air conditioner in which an upper motor for driving a cross-flow fan, a lower motor for driving the lower cross-flow fan, and an electrical component box are arranged, and a pipe connection portion is arranged on either the left side or the right side of the suction port. In the floor-standing indoor unit, an electronic expansion valve is arranged at the pipe connection portion, and the expansion valve wiring routed from the electronic expansion valve toward the electrical component box is directly connected to the upper end of the heat exchanger. A display holder is placed above the upper end of the heat exchanger , and the display holder is formed with an expansion valve wiring retainer facing the upper end of the heat exchanger. The expansion valve wiring is laid in a space between the wiring retainer and the upper end of the heat exchanger .
The invention according to claim 2 is the indoor unit according to claim 1 , wherein the display holder is a display board holder on which a display board is mounted, and a front panel that closes the display board holder to the front surface of the indoor unit. It is composed of a front holder attached to the back surface, the expansion valve wiring retainer is formed at the lower part of the display board holder, and the temperature sensor attached to the pipe connection portion is formed on the side of the display board holder facing the front panel. A sensor wiring guide portion for guiding the sensor wiring routed toward the electrical component box is formed, and the expansion valve wiring retainer is formed by bending from the sensor wiring guide portion.

According to the present invention, the expansion valve wiring routed from the electronic expansion valve arranged at the pipe connection portion toward the electrical component box is laid along the upper end of the heat exchanger, so that the guide for the expansion valve wiring can be used. There is no need to prepare special independent parts for this. If the display holder is provided with the expansion valve wiring retainer, the expansion valve wiring retainer can be used as a guide.

It is a perspective view of the floor-standing type indoor unit of an air conditioner. It is the front view which removed the suction grill and the front panel of the same indoor unit. It is a vertical sectional view of the central part of the indoor unit. It is a perspective view of the state where the suction grille and the front panel of the indoor unit are removed, as seen from the left front method. Figure It is an installation explanatory view of the switch part of an indoor unit. It is sectional drawing of the mounting part of the switch part of the same indoor unit. It is an installation explanatory view of the communication line terminal part of the same indoor unit. It is sectional drawing of the attachment part of the communication line terminal part of the same indoor unit. It is a perspective view from the right front of the indoor unit with the suction grill and the front panel removed. It is explanatory drawing of the electronic expansion valve wiring of the same indoor unit. It is an enlarged view of the wiring part of the expansion valve wiring.

In the floor-standing indoor unit 100 of the present embodiment shown in FIGS. 1 to 4, reference numeral 1 denotes a suction grill provided with a suction port 1a in the center, which is attached to the front surface of the indoor unit 100. Reference numeral 2 denotes a front panel that closes the front surface of the indoor unit 100, and is attached so that the suction port 1a of the suction grill 1 is located at the center of the front surface, and a display portion 2a is formed on the upper portion. 3 is a left panel that closes the left side of the front of the indoor unit 100, 4 is a right panel that closes the right side of the front of the indoor unit 100, and 5 is a back panel that closes the back of the indoor unit 100. The back panel 5 has an upper surface portion 5a, a left side surface portion 5b, and a right side surface portion 5c. Reference numeral 6 is an upper outlet formed on the upper part of the front panel 2, and reference numeral 7 is an upper opening / closing flap for adjusting the degree of opening / closing of the upper outlet 6. Reference numeral 8 is a lower outlet formed in the lower part of the front panel 2, and reference numeral 9 is a lower opening / closing flap for adjusting the degree of opening / closing of the lower outlet 8.

Reference numeral 10 is a heat exchanger arranged so as to be located on the back surface of the suction grill 1. 11 is a switch unit for making various settings such as the refrigerant system address and the indoor unit address of the indoor unit 100, 12 is an electrical component box having a built-in control board for controlling the indoor unit 100, and 13 is an electrical component of the indoor unit 100. It is a communication line terminal portion for connecting a communication line wired between the box 12 and the outdoor unit. The switch portion 11, the electrical component box 12, and the communication line terminal portion 13 are all arranged vertically on the inside of the left side of the indoor unit 100, that is, inside surrounded by the left side surface portion 6b and the left panel 3 of the rear panel 5. Have been placed. Reference numeral 14 is an indicator holder arranged between the upper end 10a of the heat exchanger 10 and the upper outlet 6. Reference numeral 15 is a power supply connection portion to which a power cord (not shown) is pulled out on the back side of the indoor unit 100, and reference numeral 16 is a pipe connection portion to which a pipe connecting to the outdoor unit is connected. Reference numeral 17 denotes an electronic expansion valve for adjusting the flow rate of the refrigerant, which is arranged in the pipe connection portion 6. The power supply connection portion 15, the pipe connection portion 16, and the electronic expansion valve 17 are all arranged inside the right side of the indoor unit 100, that is, inside the right side surface portion 6c of the rear panel 5 and the inside surrounded by the right panel 4. There is.

Reference numeral 18 is an upper cross-flow fan arranged in the upper part of the back surface of the heat exchanger 10 inside the upper outlet 7, and 19 is a lower cross-flow fan arranged in the lower part of the back surface of the heat exchanger 10 inside the lower outlet 8. Yes (see Figure 3). Reference numeral 20 is an upper motor (see FIG. 6) that rotationally drives the upper cross-flow fan 18, and 21 is a lower motor (see FIG. 8) that rotationally drives the lower cross-flow fan 19, both of which are on the left side of the indoor unit 100, that is, on the back surface. It is arranged inside the panel 5 surrounded by the left side surface portion 6b and the left panel 3. When the upper cross-flow fan 18 is driven by the upper motor 20 and the lower cross-flow fan 19 is driven by the lower motor 21, indoor air is sucked from the suction grill 1 into the heat exchanger 10 to exchange heat with the refrigerant. It is blown into the room from the upper outlet 6 and the lower outlet 8.

Reference numeral 22 is an upper motor holder, which holds the upper motor 20 in the indoor unit frame 24. Reference numeral 23 is a lower motor holder, which holds the lower motor 21 in the indoor unit frame 24. The switch portion 11 described above is attached to the front surface of the upper motor holder 22, and the communication line terminal portion 13 described above is attached to the front surface of the lower motor holder 23. The electrical component box 12 is arranged between the switch portion 11 and the communication line terminal portion 13.

5 and 6 are explanatory views of attachment of the switch portion 11. The upper motor holder 22 is formed with a switch mounting surface 221 on the front side. The switch unit 11 is composed of a switch board 111 on which a digital switch 111a such as a DIP switch or a rotary switch is mounted, and a box-shaped resin switch box 112 in which the switch board 111 is loaded. The switch box 112 is screwed to the switch mounting surface 221 of the upper motor holder 22 in a posture in which the open surface 112a faces the front. The switch board 111 is loaded into the switch box 112 with the digital switch 111a, which is an operation unit, facing the front and fastened with screws. The wiring (not shown) connected to the switch board 111 is connected to the electrical component box 12. Therefore, the switch board 111 can be easily accessed from the front of the indoor unit 100 by removing the left panel 3, and various settings such as the refrigerant system address and the indoor unit address can be easily performed. ..

7 and 8 are explanatory views of attachment of the communication line terminal portion 13. The lower motor holder 23 is formed with a communication line terminal mounting surface 231 on the front side. The communication line terminal portion 13 is composed of a communication line terminal block 131 and a terminal block mounting plate 132. By screwing the terminal block mounting plate 132 to the communication line terminal mounting surface 231 of the lower motor holder 23 and screwing the communication line terminal block 131 to the terminal block mounting plate 132, the terminal 131a of the communication line terminal block 131 becomes It can be installed in a front-facing position. Both the wiring drawn from the electrical component box 12 and the wiring drawn from the outdoor unit are connected to the communication line terminal block 131. By removing the left panel 3, the communication line terminal portion 13 can also be easily accessed from the front of the indoor unit 100, and the wiring work of the communication line becomes easy.

As described above, in this embodiment, the floor-standing indoor unit in which the upper motor holder 22 for holding the upper motor 20 is arranged in the upper left portion and the lower motor holder 23 for holding the lower motor 21 is arranged in the lower left portion. In 100, the switch portion 11 is attached to the front surface of the upper motor holder 22, and the communication line terminal portion 13 is attached to the front surface of the lower motor holder 23.

Even in a normal floor-standing indoor unit that is not a variable refrigerant flow control type, the upper motor holder and lower motor holder are attached, so replace the upper motor holder with the upper motor holder 22 provided with the switch mounting surface 221 and lower the lower part. By replacing the motor holder with the lower motor holder 23 provided with the communication line terminal mounting surface 231, it is possible to easily correspond to the indoor unit of the refrigerant flow rate variable control type.

Further, in the indoor unit of the refrigerant flow rate variable control type, it is necessary to mount an electronic expansion valve 17 in addition to the switch unit 11 and the communication line terminal unit 13 described above, and as described above, the electronic expansion valve is the electronic expansion valve in this embodiment. 17 is arranged in the pipe connection portion 16. However, since the pipe connection portion 16 is located inside the right panel 4, the expansion valve wiring 25 connecting between the electrical component box 12 and the electronic expansion valve 17 arranged inside the left panel 3 is an electrical component. It is necessary to wire via the vicinity of the heat exchanger 10 arranged between the product box 12 and the electronic expansion valve 17.

Therefore, in this embodiment, as shown in FIGS. 9 to 11, the expansion valve wiring 25 is provided along the space S1 formed between the display holder 14 and the upper end 10a of the heat exchanger 10. The display holder 14 is a front holder arranged on the back surface of the display unit 2a of the front panel 2 while holding the display board holder 141 in which the display board 26 having an LED or the like is loaded and the display board holder 141. It consists of 142.

The display board holder 141 includes a groove-shaped board accommodating portion 141a accommodating the display substrate 26, a lid 141b for closing the substrate accommodating portion 141a, and a sensor wiring 28 of a temperature sensor 27 for measuring the piping temperature of the piping connection portion 16. A wiring guide portion 141c for guiding and a wiring holding piece 141d for the expansion valve wiring 25 formed so as to project downward are provided below the wiring guide portion 141c.

Guide pieces 142a and 142b are formed on the front side of the front holder 142 in the direction perpendicular to the paper surface of FIGS. 10 and 11, and the display board holder 141 is guided and held between the guide pieces 142a and 142b.

The display unit 2a of the front panel 2 is formed so as to be inclined upward at an angle of about 30 degrees, and the display holder 14 is arranged according to the inclination of the display unit 2a. Therefore, the display board holder 141 is also inclined in the same manner, and the wiring holding piece 141d and the lower piece 141c1 of the wiring guide portion 141c generate a space S1 between the upper end 10a of the heat exchanger 10.

Therefore, if the expansion valve wiring 25 is laid in the space S1 in advance before the display holder 14 is attached, the expansion valve wiring 25 is the upper end of the heat exchanger 10 when the display holder 14 is attached. Surrounded by 10a, a wiring retainer piece 141d, and a lower piece 141c1 of a wiring guide portion 141c, the left panel from the inside of the right panel 4 along the heat exchanger 10 without falling off from the upper end 10a of the heat exchanger 10. It is arranged and held inside the 3.

In this way, the expansion valve wiring 25 is guided by the space S1 between the display holder 14 and the upper end 10a of the heat exchanger 11, so that a dedicated wiring guide component for the expansion valve wiring 25 becomes unnecessary. ..

Further, in the conventional floor-standing indoor unit which is not compatible with the variable refrigerant flow control type, the wiring guide portion 141c for guiding the sensor wiring 28 is formed on the display board holder, but in this embodiment, such a display board is formed. Since the expansion valve wiring 25 can be guided only by using the display board holder 141 in which the wiring holding piece 141d is added to the holder, the design of the display board holder 141 becomes easy.

The upper motor 20, the lower motor 21, the upper motor holder 22, and the lower motor holder 23 can be arranged on the right side of the indoor unit 100, that is, inside the right side surface portion 5c of the back panel 5 and the right panel 4. Further, the switch portion 11 can be attached to the front of the lower motor holder 23, and the communication line terminal portion 13 can be attached to the front of the upper motor holder 22.

1: Suction grill, 1a: Suction port, 2: Front panel, 2a: Display, 3: Left panel, 4: Right panel, 5: Back panel, 5a: Top surface, 5b: Left surface, 5c: Right surface, 6: Upper outlet, 7: Upper opening / closing flap, 8: Lower outlet, 9: Lower opening / closing flap, 10: Heat exchanger, 11: Switch part, 111: Switch board, 111a: Digital switch, 112: Switch box, 12: Electrical equipment box, 13: Communication line terminal, 131: Communication line terminal block, 132: Terminal block mounting plate, 14: Display holder, 141: Display board holder, 141a: Board housing, 141b: Lid, 141c : Wiring guide part, 141c1: Lower piece, 141d: Wiring presser piece, 142: Front holder, 142a, 142b: Guide piece, 15: Power supply connection part, 16: Pipe connection part, 17: Electronic expansion valve, 18: Upper cross Flow fan, 19: Lower cross flow fan, 20: Upper motor, 21: Lower motor, 22: Upper motor holder, 221: Switch mounting surface, 23: Lower motor holder, 231: Communication line terminal mounting surface, 24: Indoor unit Frame, 25: Expansion valve wiring, 26: Display board, 27: Temperature sensor, 28: Sensor wiring

Claims (2)

A suction port is provided in the center of the front, an upper outlet is provided in the upper part of the front, a lower outlet is provided in the lower part of the front, a heat exchanger is provided inside, and an upper cross flow fan is provided in the upper part of the back of the heat exchanger. Is arranged, a lower cross-flow fan is arranged in the lower part of the back surface of the heat exchanger, and an upper motor for driving the upper cross-flow fan and the lower cross-flow fan are driven on either the left side or the right side of the suction port. In a floor-standing indoor unit of an air conditioner in which a lower motor and an electrical component box are arranged, and a pipe connection is arranged on either the left side or the right side of the suction port.
The pipe connecting portion is an electronic expansion valve disposed in, that the electronic expansion valve was laid along the top of directly the heat exchanger expansion valve wiring routed toward the electrical component box, and An indicator holder is arranged above the upper end of the heat exchanger, and an expansion valve wiring retainer facing the upper end of the heat exchanger is formed in the indicator holder, and the expansion valve wiring retainer and the heat exchanger are formed. A floor-standing indoor unit of an air conditioner , characterized in that the expansion valve wiring is laid in a space between the upper end and the air conditioner. In the floor-standing indoor unit of the air conditioner according to claim 1,
The display holder is composed of a display board holder on which a display board is mounted and a front holder for attaching the display board holder to the back surface of a front panel that closes the front surface of the indoor unit. Expansion valve wiring retainer is formed,
On the side of the display board holder facing the front panel, a sensor wiring guide portion for guiding the sensor wiring routed from the temperature sensor attached to the piping connection portion toward the electrical component box is formed.
The floor-standing indoor unit of an air conditioner, wherein the expansion valve wiring retainer is formed so as to project downward from the lower part of the sensor wiring guide portion.

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