JPH04369352A - Air-conditioner - Google Patents

Abstract

PURPOSE:To improve the efficiency of a freezing cycle, to reduce the size of an electric part, and to form a product in a compact state by a method wherein the electric part is brought into contact with a part of a heat-exchanger on the outdoor side to conduct the heat from the electric part to the heat-exchanger. CONSTITUTION:During heating operation, a refrigerant flows as shown by a solid line, heat is emitted by a heat-exchanger 5 on the indoor side, and heat is sucked by a heat-exchanger 3 on the outdoor side to effect heating. Since heat generated from an electric part 6 being a frequency converting device is brought into contact with the heat-exchanger 3 on the outdoor side, heat is derived in a freezing cycle to produce a high-efficient freezing cycle. Meanwhile, during cooling operation, a refrigerant flows as shown by a dotted line, heat is emitted by the heat-exchanger 3 on the outdoor side, and heat is sucked by the heat-exchanger 5 on the indoor side to cool the indoor side. In which case, since the electric part 6 is brought into contact with a condenser but the electric part 6 is brought into a state that its temperature is increased to a value higher than that of the freezing cycle, the heat of the electric part 6 is transferred to the condenser and heat is emitted by the heat-exchanger 3 on the outdoor side.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner that achieves high efficiency and miniaturization by using a refrigeration cycle having means for cooling electrical components.

0002

2. Description of the Related Art In a heat pump type air conditioner, since the electric components of the frequency converter, which is an electric circuit, generate a large amount of heat, heat radiating fins or the like have been used for cooling. An example of a conventional electric circuit is disclosed in Japanese Patent Laid-Open No. 60-259869, in which a frequency converter 13, which is an electric component, is cooled using a heat radiating fin or the like.

0003

In the past, heat from electrical components was released into the atmosphere, and this heat was not used effectively when heating an air conditioner. Furthermore, since an air cooling method was used as a heat dissipation method, there was a problem that cooling efficiency was poor and miniaturization was not possible.

An object of the present invention is to improve the heating capacity of the air conditioner during heating operation by transmitting the heat generated from the electrical components to the refrigeration cycle, thereby improving the efficiency and reducing the electrical components. The purpose is to provide compact electrical components with improved heat dissipation.

[0005]

[Means for Solving the Problems] The above object is achieved by transmitting heat generated from electrical components by contacting a pipe that acts as an evaporator and absorbs heat during heating operation in a refrigeration cycle for an air conditioner. Basically, it requires less heat to be absorbed than the evaporator heat exchanger, realizing a highly efficient refrigeration cycle that is equivalent in appearance to a larger heat exchanger. Furthermore, since the electrical components absorb heat using a refrigeration cycle, the cooling efficiency can be improved compared to the conventional air cooling method, and the electrical components can be made smaller.

[0006]

[Operation] In the refrigeration cycle for a heat pump type air conditioner, by bringing the low-temperature part of the evaporator into contact with the heat generating part of the electrical component, the heat from the electrical component is taken to the endothermic side of the refrigeration cycle. Electrical components will be cooled down. Therefore, this heat is carried to the condenser side of the refrigeration cycle and heats the interior of the room. In addition, heat radiation from electrical parts is conventionally carried out by heat transfer to the outside, but since it is brought into contact with the evaporator pipe, heat conduction occurs, improving heat exchange, and the heat radiation part of electrical parts can be made smaller. becomes.

[0007]

[Example] Fig. 1 shows a refrigeration cycle and an example of the present invention. In FIG. 1, 1 is a compressor, 2 is a four-way valve, 3 is an outdoor heat exchanger, 4 is a pressure reducer, 5 is an indoor heat exchanger, and 6 is a frequency converter. Figure 2 shows the overall configuration of the electric circuit. In FIG. 2, 7 is a remote controller for temperature setting, 8 is a room temperature sensor, 9 is a control microcomputer, 10 is a power source, 11 is a rectifier circuit, 12 is a frequency converter, and 1 is a compressor. The difference between the temperature set by the remote controller 7 and the temperature determined by the room temperature sensor 8 is input to a control section 9 having a microcomputer, and the rotation speed of the compressor 1 is set in relation to this temperature difference. When the temperature difference is large, the frequency at which the rotation speed of the compressor 1 becomes high is specified. AC electricity input from a power source 10 is rectified by a rectifier circuit 11, converted by a frequency converter 12, and supplied to the compressor 1. Here, since the electrical component 6 that is the frequency converter 12 generates heat, the frequency converter 12 will be broken unless the electrical component 6 is cooled.

In a heating and cooling system having such a frequency conversion device 12, during heating operation, the refrigerant flows as shown by the solid line, radiating heat in the indoor heat exchanger 5, and absorbing heat in the outdoor heat exchanger 3 to perform heating. I'm going. Since the heat generated from the electrical component 6, which is the frequency converter 12, is in contact with the outdoor heat exchanger 3, the heat is taken into the refrigeration cycle. Conventionally, heat was absorbed from the air only from the outdoor heat exchanger 3, but in the present invention, heat can be absorbed from the electrical component 6.
Heat absorption becomes easier, and the appearance is the same as that of a large outdoor heat exchanger 3, creating an efficient refrigeration cycle. As a result, conventionally, electrical parts 6
Approximately 200W of heat (approximately 5% of the total heating capacity) that was radiated from the room can now be effectively used for heating.

Furthermore, in the past, the heat from the electrical component 6 was radiated into the air, but in the present invention, it is transferred to the refrigerant pipe by heat conduction, so heat exchange is better than in the conventional method, and a small electric It was possible to make it part 6.

A similar effect can be achieved by using a heat pipe 13 or the like in which a fluid is sealed in the pipe as shown in FIG. Since the positional relationship with the refrigeration cycle can be freely adjusted, the structure can be easily assembled.

On the other hand, during cooling operation, the refrigerant flows as shown by the dotted line, radiating heat in the outdoor heat exchanger 3, and absorbing heat in the indoor heat exchanger 5 to cool the indoor area. Here, the electrical component 6 comes into contact with the condenser, but since the temperature of the electrical component 6 is higher than the temperature of the refrigeration cycle, the heat of the electrical component 6 is transferred to the condenser, Heat can be radiated by the outdoor heat exchanger 3.

0012

[Effects of the Invention] According to the present invention, the efficiency of the refrigeration cycle is improved by transmitting the heat radiated from the electrical parts to the refrigerant in the refrigeration cycle, and the efficiency of the refrigeration cycle is improved, and the heat is easily radiated from the electrical parts. Because of this new structure, we were able to downsize the electrical components and make the product more compact.

[Brief explanation of the drawing]

FIG. 1 is a refrigeration cycle diagram showing an example of the present invention;

[Figure 2
] Typical electrical circuit diagram for operating a refrigeration cycle,

[Figure 3
] A diagram showing another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1... Compressor, 2... 4-way valve, 3... Outdoor heat exchanger, 4... Pressure reducer, 5... Indoor heat exchanger, 6... Electrical parts, 7... Remote control, 8... Temperature sensor, 9... Control unit , 11...Power source 12...Frequency converter, 13...Heat pipe.

Claims (3)

[Claims] Claim 1: In a heat pump type air conditioner, heat from the electrical component (6) is transferred to the heat exchanger (3) by contacting the electrical component (6) with the negative part of the outdoor heat exchanger (3). 3) An air conditioner characterized by having a structure that conducts electricity. 2. The air conditioner according to claim 1, further comprising a heat pipe (13) having a working fluid sealed therein between the electric component (6) and the heat exchanger (3). . Claim 3: According to claim 2, the heat pipe (13)
An air conditioner characterized by using a material with good heat conduction instead of.