JP2007187395A - Indoor machine for air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indoor machine for an air conditioner reducing refrigerant flow sound of a two-way valve installed in the middle of piping of a heat exchanger to perform quiet operation. <P>SOLUTION: In this indoor machine for the air conditioner, the two-way valve 12 for reheating dehumidification is provided in a heat exchanger 9 side face part in the middle of a refrigerant pipe of the heat exchanger 9, an inlet side pipe 12c of the two-way valve 12 is directly connected to a refrigerant straight pipe 9a of the heat exchanger 9, and an outlet side pipe 12d is directly connected to a flow division pipe 9b installed to the heat exchanger 9. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an indoor unit of an air conditioner, and more particularly to an indoor unit of an air conditioner having an improved pipe attachment structure of a two-way valve attached in the middle of a pipe of a heat exchanger.

  In a conventional air conditioner indoor unit, as shown in FIG. 6, when the two-way valve 21 for reheat dehumidification is mounted, the two-way valve 21 attached to the indoor heat exchanger is connected to the inlet side of the straight pipe of the refrigerant. The pipe 21a is connected to the curved pipe portion 22a of the U-shaped joint pipe 22 of the heat exchanger, and the long curved tubular joint pipe 21c provided with the muffler 21b is connected to the straight pipe portion 23a of the U-shaped branch joint pipe 23 (for example, Patent Document 1).

However, the conventional mounting structure has the following drawbacks.
(1) When the two-way valve and the curved tubular joint tube protrude from the drain pan provided below the heat exchanger, a structure such as a two-way valve cover for receiving drain water or heat insulation means for preventing condensation is necessary. When the drain pan is enlarged, the casing is enlarged, and the number of parts is increased, resulting in an increase in cost.
(2) In order to prevent deformation of the two-way valve mounting portion due to an impact such as a drop during transportation, some fixing means such as fixing with a tie wrap is required, resulting in high cost.
(3) By drawing the two-way valve to the position where it can be installed in the air conditioner body with the joint pipe, the flow of the refrigerant passing through the inside of the two-way valve inflow section is disturbed, and the refrigerant passing sound is emitted. It becomes easy.

In addition, as shown in FIG. 7, when the two-way valve 31 and the curved tubular joint pipe 32 are arranged on the front surface of the heat exchanger 33, the two-way valve 31, the long curved tubular joint pipe 32, etc. are obstructive, and It becomes impossible to install an electric precipitator power source, etc., and the air volume decreases.
JP 2003-148756 A

  The present invention has been made in consideration of the above-described circumstances, and provides an indoor unit of an air conditioner capable of quiet operation by reducing refrigerant flow noise of a two-way valve attached in the middle of a heat exchanger pipe. With the goal.

  In order to achieve the above-described object, an indoor unit of an air conditioner according to the present invention is provided with a unit body including a suction port and a blower outlet and includes a front panel and a rear plate, and is disposed in the unit body. In an air conditioner having a heat exchanger, a blower, and a two-way valve for reheat dehumidification in the middle of a refrigerant pipe of the heat exchanger, the two-way valve is disposed on the side surface of the heat exchanger, and The inlet side pipe of the direction valve is directly connected to the refrigerant straight pipe of the heat exchanger, and the outlet side pipe is directly connected to a branch pipe attached to the heat exchanger.

  According to the indoor unit of an air conditioner according to the present invention, it is possible to provide an indoor unit of an air conditioner capable of quiet operation by reducing refrigerant flow noise of a two-way valve attached in the middle of a heat exchanger pipe. Can do.

  Hereinafter, an indoor unit of an air conditioner according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  1 is an exploded perspective view showing an indoor unit of an air conditioner according to an embodiment of the present invention, FIG. 2 is a side view showing the front panel removed, and FIG. 3 is a perspective view showing a pipe mounting portion. It is.

  As shown in FIGS. 1 to 3, the indoor unit 1 of the air conditioner of the present embodiment includes a unit main body 2 that constitutes a housing. The unit main body 2 includes a front panel 3 that covers the front side of the indoor unit 1 and an indoor unit. And a rear plate 4 to which functional parts of the unit are attached.

  A plate-like suction panel 3a is provided on the front surface of the front panel 3 so as to be openable and closable. A front suction port 3b is opened at a lower end portion and an upper end portion of the suction panel 3a. Is opened, and a blower outlet 3e is opened at the bottom of the front panel 3.

  A heat exchanger 9 formed in an inverted V shape is disposed on the rear plate 4 in the unit body 2. The heat exchanger 9 includes a front heat exchanger 9A through which the air to be conditioned sucked from the lower suction port 3b and the upper suction port 3c passes, and a rear side through which the air to be conditioned sucked mainly from the upper suction port 3c passes. It is comprised from the heat exchanger 9B.

  Further, the rear plate is formed with an air passage 10 between the heat exchanger 9 and the air outlet 3e, and a blower configured by a cross-flow fan is provided below the heat exchanger 9 in the air passage 10 (see FIG. (Not shown) is disposed, and a motor 11 connected to the blower is disposed on the side of the heat exchanger 9.

  On the front suction side of the front heat exchanger 9A, an electrostatic precipitator 6 is disposed opposite to the suction panel 3a. The electrostatic precipitator 6 is provided with an electrostatic precipitator power source 7 on the side.

Moreover, the display part 8 is provided in the front panel 3 between the suction panel 3a lower part and the blower outlet 3e.

  Also, a two-way valve 12 for reheat dehumidification is attached to one side surface of the heat exchanger 9, for example, the right side surface in the figure, substantially behind the electric dust collector power supply unit 7.

  An electrical component box 13 for indoor units is disposed on one side of the rear plate 4 adjacent to the two-way valve 12.

  Thus, by arranging the electric dust collector power supply unit, which is a shielding member that prevents ventilation, in front of the piping space beside the heat exchanger 9, the ventilation path on the front surface of the heat exchanger 9 can be expanded, and the heat exchanger 9. It is possible to prevent a decrease in the air volume and improve the heat exchange efficiency.

  As shown in FIGS. 4 and 5, the two-way valve 12 includes a coil 12a, a valve main body 12b into which a valve operating rod having a valve body (not shown) that is raised and lowered by the coil 12a is inserted, and the valve main body 12b. From the two-way valve main body 12b so as to be orthogonal to the inlet-side pipe 12c.

  The two-way valve 12 is attached to the heat exchanger 9 by directly connecting the inlet side pipe 12c to the straight pipe 9a of the heat exchanger 9 and the U-shaped split flow in which the outlet side pipe 2d is attached to the heat exchanger 9. Directly connected to the tube 9b.

  Note that the two-way valve 12 for reheat dehumidification has a function of an electromagnetic throttle valve, and flows through the rear heat exchanger 9B as indicated by a solid arrow without being throttled when the refrigerant is opened. 9b and flows to the upper heat exchanger section 9A1 and the lower heat exchanger section 9A2 of the front heat exchanger 9A, and the front heat exchanger 9A and the rear heat exchanger 9B function as an evaporator during the cooling operation. It functions as a heater during heating operation. Further, during the dehumidifying operation in which the reheat dehumidifying two-way valve 12 is closed, the refrigerant is throttled, the upper heat exchanger section 9A1 and the rear heat exchanger 9B function as a heater, and the lower heat exchanger section 9A2 Functions as a cooler.

  By adopting the mounting structure of the two-way valve 12 as described above, the conventional two-way valve attaches the inlet side pipe and the outlet side pipe to the U-shaped pipe of the heat exchanger, and the inlet side pipe is bent of the U-shaped pipe. Unlike the case where the outlet side pipe is connected to the straight pipe portion of the U-shaped pipe through the long bent tubular joint pipe, the present embodiment is (1) a two-way valve directly from the straight pipe during dehumidifying operation. Since the refrigerant flows from the side surface of the valve to the valve body, the refrigerant does not bend the pipe and the refrigerant is not disturbed by the connection portion, so that the refrigerant can flow to the two-way valve, so a dehumidifying operation can be performed without attaching a separate muffler. The refrigerant flow noise at the time can be reduced. Further, (2) since it is connected to the straight pipe of the heat exchanger, a two-way valve can be installed in a narrow space beside the heat exchanger, and a two-way valve can be mounted on a smaller unit body. (3) Since the two-way valve can be installed above the drain pan of the same size as the conventional one, the condensed water adhering to the two-way valve can be collected by the drain pan, and the two-way valve is used as a heat exchanger. When it is disposed on the front surface of the heat exchanger, it is not necessary to install a two-way valve cover or the like disposed on the front surface of the heat exchanger that causes a decrease in the air volume. (4) By connecting the outlet side of the two-way valve to a strong branch pipe, it is possible to prevent deformation due to impact such as dropping during transportation. Furthermore, (5) it becomes possible to install an electric precipitator power supply unit or the like in front of the piping space next to the heat exchanger, and a reduction in the air volume can be prevented.

  As described above, according to the indoor unit of the air conditioner of the present embodiment, an air conditioner indoor unit that is small and easy to install an electric dust collector power supply unit and the like, quiet and inexpensive can be realized.

The disassembled perspective view of the indoor unit of the air conditioner which concerns on one Embodiment of this invention. The side view which removes and shows the front panel of the indoor unit of the air conditioner which concerns on one Embodiment of this invention. The perspective view which shows the attachment part of the two-way valve used for the indoor unit of the air conditioner which concerns on one Embodiment of this invention. The perspective view which expands and shows the attachment part of the two-way valve used for the indoor unit of the air conditioner which concerns on one Embodiment of this invention. The conceptual diagram which shows the attachment state of the two-way valve used for the indoor unit of the air conditioner which concerns on one Embodiment of this invention. The conceptual diagram which shows the attachment state of the two-way valve used for the indoor unit of the conventional air conditioner. The perspective view which shows the attachment part of the two-way valve used for the indoor unit of the conventional air conditioner.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Indoor unit of air conditioner, 2 ... Unit main body, 3 ... Front panel, 3a ... Suction panel, 3b ... Lower suction inlet, 3c ... Upper suction inlet, 3e ... Outlet, 4 ... Rear plate, 5 ... Top grill , 6 ... Electric dust collector, 7 ... Air dust collector power supply, 9 ... Heat exchanger, 9A ... Front heat exchanger, 9B ... Rear heat exchanger, 9a ... Straight pipe, 9b ... Shunt pipe, 10 ... Air passage, 11 ... motor, 12 ... two-way valve, 12a ... coil, 12c ... inlet side tube, 12d ... outlet side tube, 13 ... electrical component box.

Claims (2)

Reheat dehumidification in the middle of the unit body, which is equipped with a suction port and an air outlet and is composed of a front panel and a rear plate, a heat exchanger disposed in the unit body, a blower, and a refrigerant pipe of the heat exchanger In the air conditioner provided with a two-way valve, the two-way valve is disposed on the side surface of the heat exchanger, and the inlet side pipe of the two-way valve is directly connected to the refrigerant straight pipe of the heat exchanger, An indoor unit of an air conditioner, wherein an outlet side pipe is directly connected to a shunt pipe attached to a heat exchanger. An electrostatic precipitator is disposed on the front side of the heat exchanger. The electrostatic precipitator has an electric precipitator power supply disposed on the side of the dust collector, and the power supply is connected to the two-way valve. The indoor unit for an air conditioner according to claim 1, wherein the indoor unit is arranged on a front side.

Images