JPH0157271B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat exchange device such as an air-cooled air conditioner.

Conventional configuration and problems thereof Conventionally, air-cooled air conditioners such as heat pump type are often provided with an outdoor heat exchanger divided into a plurality of parts from the viewpoint of heat exchange efficiency. FIG. 1 shows and explains one conventional example. Reference numeral 1 denotes an indoor heat exchanger (not shown), for example, a connecting pipe 2 that is connected to a water cooler/heater, etc., through which liquid refrigerant flows, and an outlet pipe that is connected to the flow dividers 4 and 5 and through which the depressurized refrigerant flows. This expansion valve 1 is further connected to a sensing part 8 through a connecting line 9 for sensing the temperature of the gas refrigerant that has passed through divided heat exchangers 6 and 7 connected to flow dividers 4 and 5. It is connected. 10 and 11 are headers.

Conventionally, the outdoor heat exchangers 6 and 7 are configured in this way, but when there is a strong horizontal wind from either arrow A or arrow B during strong winds, the upwind heat exchanger is The amount of air passing through the heat exchanger increases, and the amount of air passing through the heat exchanger on the leeward side decreases due to the relationship between the suction air amount of the blower (not shown) installed above the heat exchangers 6 and 7 and the strong wind. Become. In this case, when the windward side heat exchanger acts as an evaporator, the degree of superheating increases, and conversely, the degree of superheating of the leeward side heat exchanger decreases, and the degree of superheating of the leeward and leeward heat exchangers increases. The difference becomes larger. Therefore, the sensing part 8 connected to the expansion valve 1 will sense an unstable temperature, and the opening degree of the expansion valve 1, which operates by sensing the temperature, will also become unstable, resulting in a hunting state and becoming unstable. It has disadvantages such as not being able to obtain the capacity of a heat exchanger.

Purpose of the Invention The present invention solves the above-mentioned conventional drawbacks, and is particularly intended to solve the problem of the split heat exchanger for medium-sized or large-sized air-cooled air conditioners (including air-cooled heat pump air conditioners) when installed outdoors during strong winds. In order to stabilize the system, for example, during heating, the difference in the degree of superheating of the divided heat exchangers acting as an evaporator is reduced, without causing one side of the divided heat exchangers to perform unilateral heat exchange. Furthermore, it is an object of the present invention to provide a heat exchanger that can improve the durability of compressors and other equipment.

Composition of the Invention In order to achieve the above object, the present invention further separates the heat exchanger provided on both sides in the outdoor heat exchanger of an air-cooled air conditioner, and After the refrigerant flows through the heat exchanger, it flows into the other separated heat exchanger on the other side, so that the refrigerant always flows across the heat exchangers on both sides.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below based on the drawings. 2 and 3 show the construction of a heat exchanger according to the invention. 15 is an indoor heat exchanger (not shown);
For example, a connecting pipe 16 connected to a water cooler/heater, etc., through which liquid refrigerant condensed in the water cooler/heater flows, and a flow divider 1
An expansion valve connected to the outlet pipe 14 connected to the 7 and 18 sides and through which the reduced pressure liquid refrigerant flows;
The divided heat exchanger on one side connected to the flow divider 17 connected to the flow divider 17 is further divided into, for example, a lower first heat exchanger 1 provided above and below.
9 and an upper second heat exchanger 20, and the flow divider 17 is connected to, for example, a lower first heat exchanger 19. The heat exchanger on the other side connected to the branch pipe 18 is further divided into, for example, a third heat exchanger 21 on the lower side and a fourth heat exchanger on the upper side, which are provided vertically. The flow divider 18 is connected to, for example, a lower third heat exchanger 21. 23 is a header of the first heat exchanger 19 provided on the inlet side of the first heat exchanger 19 on the side opposite to the flow divider 17; 24 is a header of the second heat exchanger 19;
The header 25 is the header of the second heat exchanger 20 provided on the front side of the heat exchanger 20, and the header 25 is the header of the third heat exchanger 21 provided on the side opposite to the flow divider 18 on the inlet side of the third heat exchanger 21. Header 26 is a header provided on this side of the fourth heat exchanger 22, 27 is a flow divider 17
and the first heat exchanger 19, 28 is a connecting pipe that connects the flow divider 18 and the third heat exchanger 21,
Reference numeral 29 indicates a focusing pipe connected to the outlet pipe 30 led out from the headers 24 and 26 of both the second heat exchanger 20 and the fourth heat exchanger 22, and 31 indicates the focusing pipe 2.
A sensing section 32 is attached to the sensing section 9 and is configured to sense the temperature of the refrigerant discharged from each heat exchanger, that is, to sense the temperature as shared by each heat exchanger.
1 is a connection line connected to the expansion valve 15; 33 is a connection pipe connected from the first heat exchanger 19 to the fourth heat exchanger 22 between the respective headers 23 and 23a;
4 from the third heat exchanger 21 to the second heat exchanger 20;
This is a connecting pipe connected between the respective headers 25 and 24a. Note that 23a and 24a are the second
Not shown in the figure. In this way, the heat exchanger provided on both sides is further divided into upper and lower sides or left and right, so that the refrigerant always passes through the heat exchangers on both sides.

In the above configuration, for example, during heating, liquid refrigerant condensed in a water cooler or the like enters the expansion valve 15 through the connecting pipe 16 and is depressurized there. At this time, the opening degree of the expansion valve 15 is adjusted based on the temperature sensed by the sensing section 31. The depressurized refrigerant flows to the respective flow dividers 17 and 18, and the refrigerant flowing to the flow divider 17 is evaporated in the first heat exchanger 19, and further flows through the header 23, the connecting pipe 33, and the header 23a, and then flows through the header 23, connecting pipe 33, and header 23a. Evaporation is also carried out in the four heat exchangers 22 and flows through the header 26, outlet pipe 30, and focusing pipe 29.
On the other hand, the refrigerant flowing into the flow divider 18 is transferred to the third heat exchanger 2
1, the evaporation action is carried out, and furthermore, the header 25,
It flows through the connecting pipe 34 and the header 24a, and evaporation is also performed in the second heat exchanger 20, so that the header 24,
It flows through the outlet pipe 30 and the focusing pipe 29. Then, the sensing unit 31 is shared and measures the degree of superheating of the heat exchangers on both sides.
The opening degree of the expansion valve 15 is adjusted by this, and the pressure is reduced.

Effects of the Invention As described above, according to the present invention, in the outdoor heat exchange device configured to be provided on both sides, each of these heat exchangers is separated into upper and lower (or left and right), and one separated heat exchanger on one side is separated. After the refrigerant flows through the heat exchanger, it flows to the other separated heat exchanger on the other side, and the refrigerant flows across the heat exchangers on both sides. Even when the heat exchanger is ventilated in a vertical direction, the degree of superheat of only one side of the heat exchanger (when acting as an evaporator) becomes large, and the difference in the degree of superheat becomes significant. The instability of the temperature sensed in the sensing section is also reduced, the expansion valve is operated at a stable opening, and an appropriate refrigerant pressure in the heat exchanger is maintained. As a result, the refrigeration cycle is stable not only under normal conditions but also under strong winds, there is no loss of capacity, and it has great practical effects such as protecting the compressor of the liquid pack depending on the degree of superheating. .

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view illustrating the structure of a conventional heat exchanger provided on both sides, Fig. 2 is a schematic front view of a heat exchanger according to the present invention, and Fig. 3 is a schematic diagram showing the structure of the heat exchanger. FIG. 15... Expansion valve, 17, 18... Flow divider, 1
9, 20... Separated first and second heat exchangers on one side, 21, 22... Separated third and fourth heat exchangers on the other side
Heat exchanger, 31...sensing section.

Claims (1)

[Claims] 1 In the outdoor heat exchanger of an air-cooled air conditioner, the heat exchanger is divided into two parts and is further separated, and after flowing the refrigerant into one of the separated heat exchangers on one side, the heat exchanger is separated on the other side. A heat exchanger for an air-cooled air conditioner that is configured so that the refrigerant flows through the other heat exchanger, and the refrigerant always flows across the heat exchangers on both sides.