JPH0548014Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) This invention relates to an outdoor unit of a heat pump type air conditioner in which a heat storage tank is housed in a casing.

(Conventional technology) Some heat pump air conditioners use heat storage to improve heating capacity and defrosting performance, and the outdoor unit installed outdoors is equipped with an outdoor heat exchanger, compressor, etc. is housed, and a heat storage tank is housed below it.

By the way, during heating operation in winter, drain water is generated from the outdoor heat exchanger when the outdoor heat exchanger is defrosted, and this drain water is drained from the drain port provided in the casing of the outdoor unit. It's summery. However, in cold regions where the outside temperature is below freezing, there is a risk that the drain water flowing down from the outdoor heat exchanger may freeze inside the outdoor unit before being drained from the drain port, blocking the drain port. Therefore, conventionally, a discharge pipe connected to the discharge side of the compressor is provided close to the lower part of the outdoor heat exchanger, and the heat of the high temperature and high pressure compressed gas flowing through the discharge pipe is used to drain the drain. There is one that maintains the water temperature above the freezing point and prevents drain water from freezing.
In addition, there is also a system in which an electric heater is provided in close proximity to the drain pan provided at the bottom of the outdoor heat exchanger and its surroundings, and the heat of the electric heater prevents the drain water from freezing.

However, in the former configuration, the discharge pipe must be installed below the outdoor heat exchanger,
In addition, in the latter configuration, an electric heater must be specially provided, which makes the structure complicated and
Assembly and manufacturability deteriorate. In addition, especially in the latter configuration, the number of parts increases, leading to an increase in cost, and there is a fear that excessive heat may be generated, which poses a safety problem.

(Problems to be solved by the invention) As mentioned above, conventional outdoor units have complicated structures, poor assembly and manufacturability, and
In addition, the latter configuration in particular is expensive and has safety issues.

This invention was made with attention to the above circumstances, and its purpose is to simplify the structure, improve assembly and manufacturability, reduce costs, and improve safety. The purpose of the present invention is to provide an outdoor unit for a heat pump type air conditioner.

[Structure of the idea]

(Means for solving the problem) This invention provides a drain water flow path close to the outer peripheral surface of the heat storage tank, and connects the drain water generated from the outdoor heat exchanger to the casing through the flow path. The water was drained from the drain outlet.

(Function) When the drain water generated from the outdoor heat exchanger flows down the flow path, it is warmed by the heat of the heat storage tank, and is drained from the drain port while maintaining the temperature above the solidification temperature.

(Examples) Hereinafter, each example of this invention will be described based on the drawings.

FIG. 1 and FIG. 2 show one embodiment,
1 is a casing of an outdoor unit, and inside this casing 1 there are an outdoor heat exchanger 2, a compressor 3,
An outdoor unit 6 consisting of a blower 4, a control device 5, etc. is housed therein, and a heat storage device 8 is housed below it with a partition wall 7 in between. This heat storage device 8 is composed of a heat storage tank 9 and a heat insulating material 10 surrounding the heat storage tank 9, and a lower part of the outdoor heat exchanger 2 of the heat storage tank 9 is exposed inside the casing 1. . The heat storage tank 9 is connected to a compressor 3 and an indoor unit (not shown) that constitute a refrigeration cycle.
During heating operation or dehumidification operation, high-temperature, high-pressure gas discharged from the compressor 3 flows through the heat storage tank 9 to the indoor heat exchanger, and the heat exchanger inside the heat storage tank 9 Heat is now stored in heat storage materials. The high-temperature, high-pressure gas that has passed through the heat storage tank 9 is heat-exchanged with indoor air by the indoor heat exchanger, and then the outdoor heat exchanger 2 of the outdoor unit
The air is sucked into the compressor 3 via the compressor 3. Therefore, the outer surface of the heat storage tank 9 is heated by the high-temperature, high-pressure gas. Further, an opening 11 is provided in a lower part of the outdoor heat exchanger 2 of the partition wall 7, and a drain guide 12 is formed by the edge of the opening and the upper side surface of the heat storage tank 9 of the heat insulating material 10. There is. In the lower part of the outdoor heat exchanger 2, a drain guide 12, a part of the outer peripheral surface of the heat storage tank 9, and a flow path 13 for drain water W are provided adjacent to the lower side of the heat storage tank 9 of the heat insulating material 10. . The upper end of this flow path 13 communicates with the opening 11 of the partition wall 7, and the lower end communicates with a drain port 14 provided on the bottom surface of the casing 1.

During heating operation in winter, drain water W generated from the outdoor heat exchanger 2 when defrosting the outdoor heat exchanger 2 drips downward and enters the flow passage 13 through the opening 11 in the partition wall 7. The drain water W then flows down along part of the outer circumferential surface of the heat storage tank 9 through the drain guide 12, and is then drained from the drain outlet 14 on the bottom surface of the casing 1. In this case, the drain water W flowing down along part of the outer circumferential surface of the heat storage tank 9 is warmed by the surface heat of the heat storage tank 9, and is discharged from the drain outlet 14 while maintaining a temperature above the freezing point.
is drained from

According to such a configuration, part of the heat of the heat storage tank 9 housed below the outdoor heat exchanger 2 is used to maintain the temperature of the drain water W generated from the outdoor heat exchanger 2 above the freezing point. Since the drain water W is drained from the drain port 14 while the water is still in the water, and the freezing of the drain water W inside the outdoor unit is prevented, there is no need for any other heat source to prevent the drain water W from freezing, and the structure is simple. , assembly and manufacturability are good. Moreover, there is no increase in the number of parts, contributing to cost reduction, and there is no problem with safety. In addition, it is possible to prevent deformation of the component parts due to freezing of the drain water W in the outdoor unit, and further problems such as damage to the outdoor heat exchanger 2. Furthermore, it can be used in cold regions. Furthermore, since the drain port 14 is provided on the bottom surface of the casing 1, the aesthetic appearance is not spoiled due to freezing of the drain water W drained from the drain port 14.

3 and 4 show other embodiments. This heat storage tank 9 is surrounded by a heat insulating material 10 without exposing a part thereof, and an inclined surface 15 is formed at the upper corner of the heat insulating material 10 on the flow path 13 side. Several openings 16 are provided along the longitudinal direction of the inclined surface 15, and drain guides 12 made of a material with good thermal conductivity are provided above these openings 16, and a flow path is provided adjacent to this drain guide 12. 13. Note that the drain port 14 is provided on the side surface of the casing 1 so as to communicate with the flow path 13.

Therefore, the drain water W generated from the outdoor heat exchanger 2 enters the flow path 13 through the opening 11 of the partition wall 7, flows down along the drain guide 12, and then
Water is drained from the drain port 14 on the side of the casing 1. In this case, the drain guide 12 is warmed by the surface heat of the heat storage tank 9 through the opening 16, and the drain water W flowing down along this drain guide 12 is warmed by the surface heat of the drain guide 12.
The water is drained from the drain port 14 while maintaining the temperature above the solidification temperature.

Therefore, even with such a configuration, the intended purpose of the present invention can be achieved.

[Effect of idea]

As explained above, according to this invention, part of the heat of the heat storage tank stored below the outdoor heat exchanger is used to maintain the temperature of the drain water generated from the outdoor heat exchanger above the freezing point. The structure is simple and easy to assemble and manufacture, as the drain water is drained directly from the drain port and prevents the drain water from freezing inside the outdoor unit. In addition, there is no increase in the number of parts, contributing to cost reduction, and there is no problem with safety.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of this invention; Figure 1 is a configuration diagram of the outdoor unit seen from the side, Figure 2 is a configuration diagram of the outdoor unit viewed from the front, and Figure 3 is a configuration diagram of the outdoor unit viewed from the front. 4 shows another embodiment of this invention, FIG. 3 is a block diagram of the outdoor unit seen from the side, and FIG. 4 is a block diagram of the outdoor unit seen from the front. 1...Casing, 2...Outdoor heat exchanger, 9...
...Heat storage tank, 13... Distribution path, 14... Drain port.

Claims (1)

[Scope of utility model registration request] In an outdoor unit of a heat pump air conditioner in which a heat storage tank is housed below an outdoor heat exchanger housed in a casing, a drain water flow path is provided in close proximity to the outer peripheral surface of the heat storage tank, and the outdoor heat exchanger An outdoor unit for a heat pump type air conditioner, characterized in that drain water generated from the casing is drained from a drain port provided in the casing via the flow path.