JP3052990B2 - Outdoor unit for air heat source heat pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit suitable for an air heat source heat pump, and more particularly to an outdoor unit for an air heat source heat pump which is most suitable for use with a heat storage tank.

[0002]

2. Description of the Related Art As is well known, an air heat source heat pump is a cooling and heating device which is capable of switching between cooling and heating by changing the flow of a refrigerant with a four-way switching valve, and FIG. 1 is an example of a cooling and heating system using the system.

[0003] As shown in FIG.
The heat pump 1 includes a heat pump 1, an outdoor unit 2, and a heat storage tank 3. The heat pump 1 includes a compression unit, a four-way switching valve,
Built-in expansion valve, water heat exchanger, etc. A refrigerant coil 4 serving as a heat exchanger is provided in the internal space of the outdoor unit 2. By operating a fan 5, outside air is passed through the refrigerant coil 4, and the refrigerant flowing through the coil 4 and the outside air are exchanged. Heat is exchanged between the two.

In such a cooling and heating system, in winter, the refrigerant liquid depressurized through the expansion valve is supplied to the heat pump 1.
To the outdoor unit 2 and circulate through the refrigerant coil 4 of the unit 2. Then, the refrigerant liquid flowing in the coil 4 is vaporized using outside air as a heat source, and the refrigerant gas is returned to the heat pump 1. Next, after the pressure is increased by the compression unit in the heat pump 1, the heat is condensed and released by the heat exchanger to heat the room.

On the other hand, in summer, the refrigerant liquid is sent to a heat exchanger incorporated in the heat pump 1 by operating a four-way switching valve to vaporize and absorb heat, and the pressure is increased by a compression unit. Send to Then, the refrigerant gas is circulated through the refrigerant coil 4 of the unit 2 to condense the refrigerant gas and radiate heat to the outside air.

Further, at night, hot water or cold water is produced by the heat pump 1 using cheap nighttime electric power, and the heat is stored or cooled in the heat storage tank 3 in the form of cold water, hot water or ice.

[0007]

However, such a cooling and heating system is a system using only the atmosphere as a heat source or a heat radiating source. In winter, the heating efficiency is poor because cold outside air is used as a heat source. Problem.

On the other hand, in order to make up for such a drawback, recently, a number of systems capable of positively utilizing solar heat using a heat collecting and dissipating panel have been developed. However, such systems have the following problems.

In other words, when installing the heat collecting and radiating panel, the arrangement angle and the like of the solar radiation should be minimized during the daytime in summer, and conversely as efficiently as possible during the daytime in winter. It is necessary to devise, but it is difficult to fully satisfy any of them.In consideration of the latitude and climate of the installation area, prioritize either heat dissipation efficiency in summer or heat collection efficiency in winter. That is the current situation.

[0010] Further, when the heat collecting and radiating panel is arranged from this viewpoint, in the cold storage cycle at night in summer,
In addition to the difficulty in using the radiant cooling, there is a problem that it is difficult to prevent the radiant cooling in the heat storage cycle in the nighttime in winter.

In addition, when the weather is bad and it is difficult to expect the incidence of sunlight or radiative cooling, the cooling / heating efficiency of a normal heat collecting and radiating panel is reduced, and a considerable number of units must be installed in order to compensate for this. There was also.

The present invention has been made in view of the above circumstances, and aims to use solar heat and prevent radiant cooling in winter, and to use radiant cooling and prevent solar heat from entering in summer. It is an object to provide a possible outdoor unit for an air heat source heat pump.

It is another object of the present invention to provide an outdoor unit for an air heat source heat pump that can maintain a predetermined cooling and heating efficiency with a small number of units installed even on a bad weather day.

[0014]

In order to achieve the above object, an outdoor unit for an air heat source heat pump according to the present invention is provided with an outside air inlet capable of forcibly introducing outside air into an internal space. An opening for exhausting air in the internal space to the outside is provided, and a refrigerant coil is disposed in the opening so as to be rotatable around a horizontal axis. Further, air flows from the internal space to the outside on one side of the refrigerant coil. In this state, a predetermined shielding cover is provided in a state in which is secured.

Further, the outdoor unit for an air heat source heat pump according to the present invention is provided with a waste air inlet through which waste air in a building can be introduced in addition to the above-described structure.

[0016]

In the outdoor unit for an air heat source heat pump of the present invention, the angle and direction of the refrigerant coil are adjusted in accordance with the operation mode of the heat pump so that heat exchange suitable for each mode is performed by the refrigerant coil.

The operation modes of the heat pump include a heating cycle in the daytime in winter, a heat storage cycle in the nighttime, a cooling cycle in the daytime in summer, and a cold storage cycle in the nighttime.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the outdoor unit for an air heat source heat pump according to the present invention will be described below with reference to the accompanying drawings. It is to be noted that the same reference numerals are given to components and the like that are substantially the same as those in the conventional technology, and description thereof will be omitted.

FIG. 1A is a sectional view of an outdoor unit 11 for an air heat source heat pump according to this embodiment. As can be seen from FIG.
2 is provided so that the outside air can be introduced into the internal space by the fan 13. In addition, an opening 14 for exhausting outside air introduced from the inlet 12 upward is provided on the upper surface. Further, a waste air inlet 15 capable of introducing waste air in the building is provided on a side surface.

In the opening 14, a refrigerant coil 16 as an air heat exchanger is disposed rotatably about a horizontal axis.
A shield cover 17 that rotates integrally with the refrigerant coil 16 is fixed to one side of the refrigerant coil 16.

FIG. 1B is a perspective view showing the refrigerant coil 16 and the shielding cover 17. As you can see in the figure,
The refrigerant coil 16 has a number of refrigerant tubes 18 arranged side by side, interconnecting them with fins 19, and connecting the inlet and outlet of the refrigerant tubes 18 to headers 20a and 20b, respectively. , Heat pump 1
Connected to a refrigerant pipe 21a. In addition, although the refrigerant pipe 21b connected to the heat pump 1 is similarly connected to the header 20b, it is omitted for convenience of the drawing.

On the other hand, the shielding cover 17 has a pair of curved cover pieces 22, 22 erected on both edges of the refrigerant coil 16, and another cover piece 23 is arranged between the curved cover pieces 22, 22. The cover pieces 22,
Air flow from the internal space to the outside is ensured by appropriately shifting the mounting position of 23.

Further, as shown in FIG.
Are formed by bending both ends thereof, so that the heat of the refrigerant is efficiently radiated.

As shown in FIG. 1A, a cover 24 is provided for closing a gap formed between the shielding cover 17 and the main body when the shielding cover 17 comes upward. The cover 24 normally rotates following the movement of the shield cover 17, but is locked at a position for preventing a gap generated between the cover 24 and the main body only when the shield cover 17 moves upward. It is good to keep.

As an example of a mechanism for rotating the refrigerant coil 16, for example, refrigerant tubes 21a and 21b connected to the headers 20a and 20b are rotatably attached to the side wall of the main body to support the entire weight. Refrigerant pipe 21a,
A predetermined gear may be fixed to 21b, and the gear engaged with it may be configured to be rotationally driven by a motor via a reduction gear. In addition, the sun altitude is detected by a predetermined detection device,
It is preferable that the refrigerant coil 16 be configured to be able to rotate momentarily according to the detected value.

In the outdoor unit 11 for an air heat source heat pump of the present embodiment, the angle of the refrigerant coil 16 or the direction of the shielding cover 17 is adjusted according to the operation mode of the heat pump 1, and the heat exchange suitable for each mode is performed by the refrigerant coil. 1
Step 6 The operation modes of the heat pump 1 include a heating cycle in the daytime in winter, a heat storage cycle in the nighttime, a cooling cycle in the daytime in summer, a cold storage cycle in the nighttime, and the like. The optimum position of the refrigerant coil in each mode and the outdoor unit at that time The operation of will be described below.

First, in the heating cycle, FIG.
The refrigerant coil 16 is rotated around the horizontal axis so that the refrigerant coil 16 faces the sun as shown in FIG. Here, the refrigerant coil 16 may be rotated every moment following the sun altitude, or may be rotated to the most efficient angular position, and thereafter may be set at a constant angle.

Next, the refrigerant liquid is sent from the heat pump 1 to the outdoor unit 11, and is circulated to the refrigerant coil 16 via the refrigerant pipe 21a or 21b. Then, the refrigerant liquid flowing in the coil 16 is vaporized by the solar heat and returned to the heat pump 1. After the pressure is increased by the compression unit, the refrigerant is condensed and released by the heat exchanger to heat the room.

Here, even when the weather is bad and solar heat cannot be expected much, by operating the fan 13, it is possible to perform heat absorption equivalent to that of a conventional air heat exchanger using the atmosphere as a heat source. In addition, if necessary, waste air in the building can be introduced into the outdoor unit 11 through the waste air inlet 15, and the waste heat can be used as a heat source.

Next, in the heat storage cycle during the winter night, as shown in FIG. 2 (b), the refrigerant coil 16 is rotated so that the shielding cover 17 is located upward, and a gap formed between the cooling coil 16 and the main body is removed. Close with 24. Next, the refrigerant liquid in the refrigerant coil 16 is vaporized by using the atmosphere or waste air in the building as a main heat source, and the heat absorbed at that time is used to generate hot water by the heat pump 1, which is stored in the heat storage tank 3.

Here, since the shielding cover 17 is located above the refrigerant coil 16, the energy radiated from the coil 16 is reflected by the inner surface of the shielding cover 17, and as a result, the radiation cooling is suppressed. Heat storage efficiency can be improved.

Next, in the cooling cycle in the daytime in the summer, as shown in FIG. 3A, the refrigerant coil 16 is rotated so that the shielding cover 17 is located upward, and the fan 13 is operated. In this state, the high-pressure refrigerant gas having absorbed the indoor heat is supplied from the heat pump 1 to the outdoor unit 11.
To be passed through the refrigerant coil 16 via the refrigerant pipe 21a or 21b. Then, the refrigerant gas is condensed in the coil and radiates heat to the outside air.

Here, since the shielding cover 17 is located above the refrigerant coil 16, the sunlight is transmitted to the shielding cover 1.
7 does not enter the refrigerant coil 16. Therefore, heat is efficiently dissipated even in the daytime in summer.

Next, in the cold storage cycle in the summer night, the refrigerant coil 16 is rotated so that the shielding cover 17 is directed downward as shown in FIG. 3B, and the fan 13 is operated as required. When the heat pump 1 is operated in this state in the same manner as in the cooling cycle, the refrigerant gas is condensed and radiated in the coil using the atmosphere and radiant cooling as main radiating sources, and is used to make cold water or ice. Store in heat storage tank 3. In addition, even when the weather is bad and radiation cooling cannot be expected much, it is possible to perform heat radiation equivalent to that of the conventional air heat exchanger by operating the fan 13.

As described above, according to the outdoor unit for an air heat source heat pump of this embodiment, by rotating the refrigerant coil having the shield cover attached thereto, the heat source can be most appropriately formed according to the operation mode of the heat pump. And a heat radiation source can be arbitrarily selected. For this reason, it is possible to construct an efficient cooling and heating system throughout the year, and the system takes into consideration energy saving and the global environment.

Further, in comparison with the conventional air heat exchanger that uses only the atmosphere as a heat source or a heat radiation source, the outdoor unit of this embodiment uses solar heat, radiant cooling, and waste air in a building as a heat source or a heat radiation source. I decided to
This leads to the effective use of resources and can even slightly prevent global warming.

Further, according to the present embodiment, even when the weather is bad and solar heat or radiant cooling cannot be used much, by introducing outside air or waste air in a building, it is possible to obtain the same or better than the conventional air heat exchanger. Cooling and heating operation can be performed. Therefore, it is possible to reliably obtain a certain efficiency with a small installation space, and it is not necessary to increase the number of installations in consideration of a decrease in efficiency when the weather is bad like the conventional system using the heat collection and heat dissipation panel Absent. However, if necessary, the outdoor unit 31 may be configured by arranging a number of the refrigerant coils 16 and the shielding covers 17 in parallel as shown in FIG.

Although not specifically mentioned in the present embodiment, various types of heat pumps can be used, and it does not matter whether it is a heat recovery type.

[0039]

As described above, the outdoor unit for an air heat source heat pump according to the present invention is provided with an outside air inlet through which outside air can be forcibly introduced into the internal space, and an opening for exhausting the air in the internal space to the outside. The refrigerant coil is disposed at the opening so as to be rotatable around a horizontal axis, and a predetermined shielding cover is disposed on one side of the refrigerant coil in a state where air flow from the internal space to the outside is secured. Therefore, it is possible to use solar heat and prevent radiant cooling in winter, and to use radiant cooling and prevent solar heat from entering in summer. Also, even on a bad weather day, the predetermined cooling and heating efficiency can be maintained with a small number of installations.

[0040]

[Brief description of the drawings]

1A is a cross-sectional view of an outdoor unit for an air heat source heat pump according to the present embodiment, FIG. 1B is a perspective view of a refrigerant coil and a shielding cover provided in the outdoor unit, and FIG. FIG. 3 is a detailed perspective view of a fin attached to the fin.

FIG. 2 (a) is an explanatory diagram showing the position of a refrigerant coil in a winter daytime heating cycle, and FIG. 2 (b) is an explanatory diagram showing the position of a refrigerant coil in a nighttime heat storage cycle.

FIG. 3 (a) is an explanatory diagram showing the position of a refrigerant coil in a summer daytime cooling cycle, and FIG. 3 (b) is an explanatory diagram showing the position of a refrigerant coil in a nighttime cold storage cycle.

FIG. 4 is a view showing a modification of the outdoor unit for an air heat source heat pump according to the embodiment.

FIG. 5 is a block diagram showing a conventional air heat exchanger and a cooling / heating system using the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat pump 3 Heat storage tank 11 Outdoor unit for air heat source heat pump 12 Outside air inlet 13 Fan 14 Opening 15 Building waste air inlet 16 Refrigerant coil 17 Shut-off cover 18 Refrigerant pipe 19 Fin

Claims (2)

(57) [Claims] 1. An outside air introduction port through which outside air can be forcibly introduced into an internal space, an opening for exhausting air in the internal space to the outside is provided, and a refrigerant coil is rotatably disposed around the horizontal axis in the opening. An outdoor unit for an air heat source heat pump, wherein a predetermined shielding cover is provided on one side of the refrigerant coil in a state where air flow from the internal space to the outside is ensured. 2. The outdoor unit for an air heat source heat pump according to claim 1, further comprising a waste air inlet capable of introducing waste air in the building.