JPS6032843Y2 - Freeze prevention structure for air conditioners - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement in the structure for preventing freezing of drain water in an outdoor unit of a heat pump type air conditioner.
One of the purposes is to prevent condensed water from the outdoor heat exchanger and drain water from defrost from freezing on the lower part of the outdoor heat exchanger and the substrate.

Conventionally, the antifreeze structure of this type of air conditioner has been such that a pipe is interposed between the outdoor heat exchanger and the board, and during defrosting, high-pressure, high-temperature refrigerant is passed through this pipe to melt frozen ice. A structure is known in which a heater is directly interposed between an outdoor heat exchanger and a substrate to melt frozen ice.

The former can melt ice frozen at the bottom of the heat exchanger and on the board by flowing high-temperature, high-pressure refrigerant only during defrosting, but it does not have a melting function because the high-temperature, high-pressure refrigerant does not flow during normal heating operation. Defrosting may end with insufficient dissolution, and the drain water refreezes and accumulates in the lower part of the heat exchanger and around its substrates, impeding the heat exchange action.

Regarding the latter method, ice can always be melted by applying electricity, but it requires additional electrical energy and has the drawback of high power consumption and high cost.

In view of this fact, the present invention utilizes a heat pipe known as a heat conduction element to effectively utilize the heat dissipated from the surface of the compressor to remove ice frozen at the bottom of the heat exchanger or around the board. The objective is to provide an antifreeze structure that melts continuously during machine operation.

Hereinafter, the present invention will be described with reference to the accompanying drawings showing one embodiment thereof.

In Fig. 1, 1 is a compressor, 2 is a four-way valve, 3 is an outdoor heat exchanger, 4 is a capillary tube, 5 is an indoor heat exchanger, and 6 is an accumulator. A heat pump type refrigeration cycle is provided, and these are arranged in an indoor unit 7 and an outdoor unit 8.

Reference numeral 9 denotes a heat pipe having a well-known structure, one end of which is wound into a coil shape and arranged at a predetermined interval around the outer periphery of the compressor 1 of the outdoor unit 8, and the other end is connected to the outdoor heat exchanger 3 and the outdoor heat pipe. It is interposed between the substrates 11 in the unit 8.

Reference numeral 10 denotes an elastic heat transfer member provided on the coiled portion of the heat pipe 9. As shown in FIGS. 2 and 3, one end is fixed to the surface of the heat pipe 9 by welding or the like, and the other end It is pressed against the surface of the compressor 1 by spreading out against the heat pipe 9, and the expansion and contraction action of the other end prevents the vibrations of the compressor 1 from being directly transmitted to the heat pipe 9, and absorbs the vibrations.

The specific structure of the heat transfer member 10 may be, for example, a wire such as a wire brush, or a collection of small pieces shaped like fish scales, but the structure is not limited to these.

Reference numeral 12 denotes a heat insulating material having a soundproofing function, which seals the periphery of the compressor 1 wound in a coil shape with the heat pipe 9 in at least one layer with the substrate 11.

The other end of the heat pipe 9 is connected to one of the through holes 3a formed to communicate with the refrigerant return bend 13 in the outdoor heat exchanger 3, as shown in FIGS. 4 and 5. It is inserted into the book so as to be in contact with the outdoor heat exchanger 3.

Note that 14a and 14b are side plates of the outdoor heat exchanger 3.

In the above configuration, when the refrigeration cycle of the air conditioner is operated, the heat released from the compressor 1 continuously melts the ice frozen between the outdoor heat exchanger 3 and the substrate 11 through the heat pipe 9. Used as energy.

Moreover, since the compressor 1 is sealed between the heat insulating material 12 and the substrate 11, most of the heat radiation from the compressor is carried out by the heat pipe 9.
, and at the same time, the outside of the compressor 1 can be effectively cooled.

Furthermore, the sound of the compressor 1 is also blocked by the heat insulating material 12, making it even quieter.

Therefore, troubles due to overheating of the compressor can be prevented, and the heat exchange efficiency of the outdoor heat exchanger 3 can be improved.

In addition, as a structure in which one end of the heat pipe 9 is interposed between the outdoor heat exchanger 3 and the substrate 11, the same effect can be obtained even if the heat pipe 9 itself is provided with fins or the like at its periphery or bottom. can be expected.

As is clear from the above embodiments, the antifreeze structure of the air conditioner according to the present invention includes winding one end of the heat pipe in a coil shape and disposing it around the outer circumference of the compressor at a constant interval.
An elastic heat transfer member is disposed between the heat pipe and the compressor, the periphery of the compressor is sealed with a substrate and at least one layer of heat insulating material, and the other end of the heat pipe is connected to the heat exchanger. Since the heat radiated from the compressor is continuously transferred through the heat pipe, frozen drain water can be melted continuously without using other heat sources, resulting in energy saving effect. At the same time, it also prevents failures due to overheating of the compressor.
Furthermore, the heat exchange efficiency of the outdoor heat exchanger is increased, and the elasticity of the heat transfer member absorbs the vibrations of the compressor, reducing the possibility of the heat pipe breaking. Since it can be covered, it has various advantages, such as being able to reduce the noise of the compressor.

[Brief explanation of the drawing]

Fig. 1 is a refrigeration cycle diagram of an air conditioner equipped with an antifreeze structure according to an embodiment of the present invention, Fig. 2 is a cross-sectional view from the plane of section A in Fig. ■−■
4 is an enlarged view of section B in FIG. 1, and FIG. 5 is a sectional side view of the main part taken along line 1--2 in FIG. 4. 1...Compressor, 3...Outdoor heat exchanger, 8...Outdoor unit, 9...Heat pipe, 10... Heat transfer member, 12...
・Insulation material.

Claims (1)

[Scope of utility model registration request] In an outdoor unit 8 of a heat pump type air conditioner comprising a heat exchanger 3, a compressor 1, etc., a heat pipe 9
One end is wound into a coil shape and arranged around the outer periphery of the compressor 1 at a constant interval, and an elastic heat transfer member 10 is arranged between the heat pipe 9 and the compressor 1. A freeze prevention structure for an air conditioner, in which the periphery of the air conditioner 1 is sealed with a substrate 11 and at least one layer of heat insulating material 12, and the other end of the heat pipe 9 is connected to the heat exchanger 3 for heat exchange.