JPH11325634A - Air conditioner four-way valve cooling system - Google Patents

Abstract

(57) [Problem] To provide a four-way valve cooling device for an air conditioner having a high cooling effect. SOLUTION: The refrigerant discharged from a discharge port of a compressor is:
A four-way valve (4) having a pilot solenoid valve (11), an outdoor heat exchanger, an expansion mechanism, an indoor heat exchanger, and a heat pump refrigeration cycle circulating through the four-way valve (4) to the suction port of the compressor; In the four-way valve of the air conditioner, which selects heating or cooling by switching the refrigerant flow path by energizing the refrigerant, the solenoid coil 12 of the pilot solenoid valve 11 and the outlet of the four-way valve 4 to the suction port of the compressor are provided. The tube is thermally connected by a heat conductor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a four-way valve cooling device for an air conditioner.

[0002]

2. Description of the Related Art Conventional four-way valve cooling devices for air conditioners are:
As disclosed in Japanese Utility Model Publication No. 59-122471, a radiator plate was attached to an electromagnetic coil of a pilot solenoid valve of a four-way valve.

[0003]

However, in the above configuration, the heat radiation of the heat radiation plate depends only on the natural convection of the surrounding air, and there is a problem that the cooling effect is low.
In view of the above problems, an object of the present invention is to provide a four-way valve cooling device for an air conditioner having a high cooling effect.

[0004]

According to the present invention, a refrigerant discharged from a discharge port of a compressor is supplied to a four-way valve having a pilot solenoid valve, an outdoor heat exchanger, an expansion mechanism, and an indoor heat exchanger. An air conditioner that includes a heat pump refrigeration cycle that circulates through an exchanger, the four-way valve to the suction port of the compressor, and switches heating / cooling by switching a refrigerant flow path by energizing the pilot solenoid valve. In the valve, an electromagnetic coil of the pilot solenoid valve and an outlet pipe of the four-way valve to a suction port of the compressor are thermally connected by a heat transfer body.

[0005] Further, the heat transfer body is a metal plate having a high thermal conductivity.

In addition, both ends of the metal plate are bonded to an outlet pipe of the four-way valve and an outer periphery of the electromagnetic coil.

[0007] Further, the heat transfer body is a metal tape with a single-sided adhesive.

Further, the heat transfer body is made of aluminum.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the embodiments of the present invention shown in FIGS. First, a first embodiment of the present invention shown in FIGS. 1 and 4 will be described. As shown in a refrigerant circuit diagram partially represented in a schematic diagram of FIG. 1, 1 is a compressor for compressing refrigerant vapor, 4 is a cooling operation of a flow of refrigerant discharged from a discharge port 2 of the compressor 1, This is a four-way valve that switches according to heating operation or the like.
The four-way valve 4 includes a piston 5 for switching a refrigerant flow path,
A main body case 6, an inlet pipe 7 from the discharge port 2 of the compressor 1 opened to the main body case 6, and an outdoor heat exchanger 26 described later.
, An outlet pipe 9 from an indoor heat exchanger 28, an outlet pipe 10 to the suction port 3 of the compressor 1, and a pilot solenoid for operating the piston 5 by using the pressure of a refrigerant. And a valve 11. The pilot solenoid valve 11 includes an electromagnetic coil 12, a plunger 13 operated by the electromagnetic coil 12,
Springs 14 and 15 for assisting the operation of the valve, a valve case 16 accommodating the plunger 13,
And a valve pipe 1 for guiding the suction force of the compressor 1 from the outlet pipe 10 to the valve case 16
A valve pipe 20 for guiding the suction force to the right side of the piston 5 when the port 17 is opened; and a valve pipe 21 for guiding the suction force to the left side of the piston 5 when the port 18 is opened. It consists of.

As shown in FIG. 3, the outlet tube 10 and the electromagnetic coil 12 are provided with a heat transfer body for transferring the heat of the electromagnetic coil 12 to the outlet tube 10 to cool the electromagnetic coil 12. An aluminum metal tape 22 with a single-sided adhesive is stuck. Since the heat transfer body is an aluminum metal tape 22 with a single-sided adhesive, it has good thermal conductivity and can be attached very easily. 2
Reference numeral 3 denotes a mode switch for switching between cooling and heating, and reference numeral 24 denotes a control unit that receives a mode signal from the mode switch 23 and turns on / off the energization of the electromagnetic coil 12. An outdoor heat exchanger 25 is connected to the outlet pipe 8 of the four-way valve 4 and exchanges heat with the outside air. 26 is an electronic expansion valve that is an expansion mechanism through which the refrigerant passes and adiabatically expands. 27 is the four-way valve. 4 is an indoor heat exchanger connected to the outlet pipe 9 for exchanging the heat of the refrigerant with the indoor air. In addition, as the heat transfer body, the aluminum metal tape 22 with the one-sided adhesive
However, if a thick metal plate such as an aluminum metal plate is used, the mounting workability such as bonding is slightly deteriorated, but the heat transfer is improved and the cooling can be performed better.

Next, the operation and effect of the above configuration will be described. First, the heating operation shown in FIG. 1 will be described. As shown in the explanatory view of FIG. 4, when the mode switch 23 is in the heating mode, the control unit 24 energizes the electromagnetic coil 12, and as shown in FIG. Since the sum of the suction force of the spring 13 and the operation force of the spring 15 is stronger than the operation force of the spring 14, the plunger 13 is pushed to the right to open the port 17, and the suction force of the compressor 1 is reduced. The valve pipe 19
And 20 are guided to the right side of the piston 5, the pressure on the right side of the piston 5 becomes lower than the left side, and the piston 5 is pressed on the right side, and the discharge port 2 of the compressor 1 is discharged.
Is connected to the outlet pipe 9 to the indoor heat exchanger 27, and the outlet pipe 8 from the outdoor heat exchanger 25 is connected to the outlet pipe 10 to the suction port 3 of the compressor 1, The refrigerant circuit performs a heating operation. In this state, the compressor 1
The discharged high-temperature and high-pressure refrigerant vapor passes through the inlet pipe 7 and the outlet pipe 9 of the four-way valve 4, radiates heat to the indoor air in the indoor heat exchanger 27, and is condensed by heating for the high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant liquid is adiabatically expanded by the electronic expansion valve 26 to become a low-temperature and low-pressure refrigerant liquid, and the low-temperature and low-pressure refrigerant liquid absorbs heat from the outside air in the outdoor heat exchanger 25. It evaporates to become low-temperature and low-pressure refrigerant vapor, and returns from the outlet pipe 8 of the four-way valve 4 through the outlet pipe 10 to the suction side of the compressor 1. The temperature of the outlet pipe 10 becomes low due to the passage of low-temperature and low-pressure refrigerant vapor, so that the heat of the electromagnetic coil 12 heated by the conduction through the aluminum metal tape 22 and energized is effectively absorbed and cooled. Is done.

Next, the cooling operation shown in FIG. 2 will be described. As shown in the explanatory view of FIG. 4, when the mode switch 23 is in the cooling mode, the control unit 24 does not energize the electromagnetic coil 12, and the operating force of the spring 14 is reduced as shown in FIG. Since the operating force of the spring 15 is stronger, the plunger 13 is pushed to the left to open the port 18, and the suction force of the compressor 1 passes through the valve pipes 19 and 21 to the left of the piston 5. Guided, said piston 5
The pressure on the left side of the compressor becomes lower than the right side, the piston 5 is pressed to the left side, and the inlet pipe 7 from the discharge port 2 of the compressor 1 is connected to the outlet pipe 8 to the outdoor heat exchanger 25,
An outlet pipe 9 from the indoor heat exchanger 27 is connected to an outlet pipe 10 to the suction port 3 of the compressor 1 to form a refrigerant circuit for performing a cooling operation. In this state, the high-temperature and high-pressure refrigerant vapor discharged from the compressor 1 passes through the inlet pipe 7 of the four-way valve 4, passes through the outlet pipe 8, and is condensed by radiating heat to the outside air in the outdoor heat exchanger 25. The high-temperature and high-pressure refrigerant liquid is adiabatically expanded by the electronic expansion valve 26 to become a low-temperature and low-pressure refrigerant liquid, and the low-temperature and low-pressure refrigerant liquid is indoors by the indoor heat exchanger 27. It absorbs heat from air and evaporates by cooling to become low-temperature, low-pressure refrigerant vapor,
It returns from the outlet pipe 9 of the four-way valve 4 to the suction side of the compressor 1 through the outlet pipe 10. The outlet pipe 10 is cooled down by the passage of the low-temperature and low-pressure refrigerant vapor, so that the electromagnetic coil 1 passes through the aluminum metal tape 22.
Cool 2 During the cooling operation, the electromagnetic coil 12 is not energized and is not heated, but when the electromagnetic coil 12 is energized and switched to the heating operation, it is cooled sufficiently, which is advantageous.

Next, a second embodiment of the present invention shown in FIGS. 1 and 5 will be described. The second embodiment differs from the first embodiment in that a heat transfer member for cooling the electromagnetic coil 12 is attached. As shown in FIG. 5, an aluminum metal tape 22 with a single-sided adhesive is applied between the outlet tube 8 and the electromagnetic coil 12 as a heat transfer member for cooling the electromagnetic coil 12. As shown in FIG. 1, when the electromagnetic coil 12 is energized to form a refrigerant circuit that performs a heating operation, the outlet pipe 8 becomes low-temperature by passing low-temperature low-pressure refrigerant vapor. The electromagnetic coil 12 which is heated by being energized by passing through the metal tape 22
Heat is absorbed and is effectively cooled.

Next, a third embodiment of the present invention shown in FIGS. 6 to 8 will be described. With the first embodiment,
Outlet pipe 8 from the outdoor heat exchanger 25 to the four-way valve 4
And the connection of the outlet pipe 9 from the indoor heat exchanger 27 is different, so that the operation mode when the power supply to the electromagnetic coil 12 is turned ON / OFF is different. As shown in FIG. 6, the outlet pipe 8 from the outdoor heat exchanger 25 and the inlet pipe 7 from the discharge port 2 of the compressor 1 are connected to a refrigerant so that a cooling operation is performed when the electromagnetic coil 12 is energized. The outlet pipe 9 from the indoor heat exchanger 27 and the outlet pipe 10 to the suction port 3 of the compressor 1 are connected so that the refrigerant flows. As shown in FIG. 7, an aluminum metal tape 22 with a single-sided adhesive is provided between the outlet pipe 9 and the electromagnetic coil 12 as a heat transfer member for cooling the electromagnetic coil 12.
Paste. As shown in the explanatory diagram of FIG. 8, when the mode switch 23 is in the cooling mode, the electromagnetic coil 12
As shown in FIG. 6, a refrigerant circuit for performing a cooling operation is performed in the same procedure as in the heating operation of the first embodiment, and the low temperature and low pressure refrigerant vapor passes through the outlet pipe 9 as shown in FIG. As a result, the temperature of the electromagnetic coil 12 becomes low, so that the heat of the electromagnetic coil 12 that has been heated by being energized through the aluminum metal tape 22 is absorbed and cooled effectively.

[0015]

As described above, according to the present invention,
It becomes a four-way valve cooling device for air conditioners with high cooling effect.

[Brief description of the drawings]

FIG. 1 is a refrigerant circuit diagram of a first embodiment and a second embodiment of an air conditioner according to the present invention, showing a heating operation state.

FIG. 2 is a refrigerant circuit diagram of a first embodiment and a second embodiment of the air conditioner according to the present invention, showing a cooling operation state.

FIG. 3 is a perspective view of a first embodiment of a four-way valve cooling device for an air conditioner according to the present invention.

FIG. 4 is an explanatory diagram showing a relationship between a mode switch and an energized state of an electromagnetic coil according to the first and second embodiments of the air conditioner according to the present invention.

FIG. 5 is a perspective view of a second embodiment of a four-way valve cooling device for an air conditioner according to the present invention.

FIG. 6 is a refrigerant circuit diagram of a third embodiment of the air conditioner according to the present invention, showing a cooling operation state.

FIG. 7 is a perspective view of a third embodiment of a four-way valve cooling device for an air conditioner according to the present invention.

FIG. 8 is an explanatory diagram showing a relationship between a mode switch and an energized state of an electromagnetic coil in a third embodiment of the air conditioner according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Compressor 2 Discharge port 3 Suction port 4 Four-way valve 8 Outlet pipe from outdoor heat exchanger 9 Outlet pipe from indoor heat exchanger 10 Outlet pipe 11 Pilot solenoid valve 12 Electromagnetic coil 22 Aluminum metal tape with single-sided adhesive ( Heat transfer element) 25 Outdoor heat exchanger 26 Electronic expansion valve (expansion mechanism) 27 Indoor heat exchanger

Claims (5)

[Claims] 1. A refrigerant discharged from a discharge port of a compressor,
A four-way valve having a pilot solenoid valve, an outdoor heat exchanger, an expansion mechanism, an indoor heat exchanger, a heat pump type refrigeration cycle circulating through the four-way valve to the suction port of the compressor, and energizing the pilot solenoid valve. In the four-way valve of the air conditioner that switches between the refrigerant flow paths to select heating or cooling, an electromagnetic coil of the pilot solenoid valve, and an outlet pipe to the suction port of the compressor of the four-way valve, A four-way valve cooling device for an air conditioner, wherein the four-way valve cooling device is thermally connected by: 2. The four-way valve cooling device for an air conditioner according to claim 1, wherein said heat transfer member is a metal plate having a high thermal conductivity. 3. The four-way valve cooling device for an air conditioner according to claim 2, wherein both ends of said metal plate are bonded to an outlet pipe of said four-way valve and an outer periphery of said electromagnetic coil. 4. The four-way valve cooling device for an air conditioner according to claim 1, wherein said heat transfer body is a metal tape with a single-sided adhesive. 5. The four-way valve cooling device for an air conditioner according to claim 2, wherein the heat transfer body is made of aluminum.