JP2015017722A - Heat exchanger and heating and cooling air conditioning system using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger and a heating and cooling air conditioning system using the same capable of achieving both satisfactory air conditioning performance and energy saving characteristics in a cooling operation and a heating operation respectively.SOLUTION: A heat exchanger has internal volume divided into two by partitioning internal space. In each partitioned internal space (internal space 1 and internal space 2), a refrigerant inflow port (refrigerant inflow port 10 and refrigerant inflow port 12) and a refrigerant outflow port (refrigerant outflow port 14 and refrigerant outflow port 16) are provided. A branch pipe communicating from a refrigerant pipe to the refrigerant inflow port 10 and the refrigerant inflow port 12, and a collecting pipe for communicating from the refrigerant outflow port 14 and the refrigerant outflow port 16 to the refrigerant pipe are provided. An opening/closing mechanism 18 is provided between a branch portion of the branch pipe and the refrigerant inflow port 10, and an opening/closing mechanism 20 is provided between a collecting portion of the collecting pipe and the refrigerant outflow port 14.

Description

  The present invention relates to a heat exchanger capable of varying capacity and a cooling / heating air conditioning system using the same, and more specifically, variable capacity heat exchange capable of achieving both good air conditioning performance and energy saving characteristics in each of cooling operation and heating operation. The present invention relates to a container and an air conditioning system using the same.

  In general, in an outdoor unit heat exchanger of an air conditioning / air conditioning system, when the temperature of the outside air decreases during heating operation, frost adheres to the outdoor unit heat exchanger, reducing the ventilation rate and the heat exchange rate. It was necessary to defrost to make it come. Therefore, the windward side heat exchanger and the leeward side heat exchanger arranged in parallel on the windward side and the leeward side with respect to the outdoor air passage are used as outdoor unit heat exchangers, and during heating, the high-temperature refrigerant is used as the windward side heat exchanger. A cooling and heating air conditioning system is known in which the refrigerant having a low temperature due to adiabatic expansion flows to the leeward heat exchanger and the high temperature refrigerant flows in the order of the leeward heat exchanger and then the windward heat exchanger during cooling. (For example, refer to Patent Document 1).

  The effect of the air conditioning and air conditioning system is brought about by the improvement of the condensation performance by using the combined capacity of the two heat exchangers, the windward heat exchanger and the leeward heat exchanger, during cooling operation. The cooling performance of the air conditioning system is greatly improved.

  On the other hand, during heating operation, condensation heat is radiated from the windward heat exchanger toward the leeward heat exchanger. Due to the heat radiation, a frost formation effect and a defrosting effect are exerted on the surface of the leeward heat exchanger, and the heating performance is improved as the refrigerant evaporation performance is improved.

  However, if the refrigerant is overcooled by heat release from the windward heat exchanger during heating operation, the refrigerant temperature entering the leeward heat exchanger may be excessively lowered. If the refrigerant temperature is too low and the heat exchange performance of the leeward heat exchanger cannot catch up, the refrigerant will be insufficiently evaporated, increasing the risk of so-called liquid back (a state in which liquid refrigerant is sent to the compressor). become.

  In normal system control, in order to avoid this state, the expansion valve control is controlled in the throttle direction, the refrigerant entering the leeward heat exchanger is reduced in pressure, and sufficient evaporation of the refrigerant is urged. However, when the pressure of the refrigerant is reduced, the surface of the heat exchanger becomes lower in temperature and is likely to be frosted.

  When the hard frost formation effect of the leeward heat exchanger due to the condensation heat radiation of the windward heat exchanger cannot catch up, (1) frost formation of the heat exchanger, (2) deterioration of the heat exchanger performance (evaporation performance), ( 3) A vicious circle of system control pressure reduction and (4) heat exchanger frost formation will occur.

JP 2008-25897 A

  As a method for solving the above problem, it is conceivable to reduce the size of the windward side heat exchanger to a size that is balanced in terms of performance. It is preferable that the cooling effect is expressed as much as possible, resulting in a contradiction.

  Also, if the downwind heat exchanger is made smaller than the downwind heat exchanger, the ventilation resistance value increases or decreases with respect to the ventilation area of the downwind heat exchanger, and the drift of the passing air causes the downwind heat exchanger to The heat exchanger performance is degraded.

  In view of the problems in the prior art as described above, an object of the present invention is to provide a heat exchanger and an air conditioning air conditioning system using the heat exchanger that can achieve both good air conditioning performance and energy saving characteristics in each of cooling operation and heating operation. It is to provide.

  In order to achieve the above object, the present inventor conducted extensive research on the structure of the heat exchanger installed on the windward side, and as a result, the heat exchanger has a variable capacity by partitioning the internal space of the heat exchanger. Has been found to be extremely effective, and the present invention has been achieved.

That is, the present invention
A heat exchanger having a first internal space and a second internal space divided into two by providing a partition in the internal space,
A first refrigerant inlet and a second refrigerant inlet, a first refrigerant outlet and a second refrigerant outlet provided in each of the first internal space and the second internal space;
A branch pipe communicating from the refrigerant pipe to the first refrigerant inlet and the second refrigerant inlet;
A collecting pipe communicating from the first refrigerant outlet and the second refrigerant outlet to the refrigerant pipe;
A first opening / closing mechanism provided between a branch portion of the branch pipe and the first refrigerant inlet;
A second opening / closing mechanism provided between a collecting portion of the collecting pipe and the first refrigerant outlet;
Having
A heat exchanger characterized by the above is provided.

  In the heat exchanger of the present invention, when both the first opening / closing mechanism and the second opening / closing mechanism are opened, the refrigerant flows through the entire internal space, and the entire internal volume of the heat exchanger may be used. it can. When both the first opening / closing mechanism and the second opening / closing mechanism are closed, the refrigerant flows only in the first internal space, and only the internal volume corresponding to the first internal space can be used.

  Further, the present invention is an air conditioning / air conditioning system in which heat exchangers are provided on the windward side and the leeward side with respect to the outdoor air passage, and the heat exchanger installed on the windward side is the heat exchange according to the present invention. An air conditioning system is also provided.

  In the air conditioning / air conditioning system of the present invention, during the cooling operation, the first opening / closing mechanism and the second opening / closing mechanism are both opened, and all of the internal spaces of the heat exchanger (the first internal space and the The refrigerant is circulated in the second internal space), and during the heating operation, the first opening and closing mechanism and the second opening and closing mechanism are both closed, and the refrigerant is circulated only in the internal space 1 of the heat exchanger. Are preferred.

  During cooling operation, the maximum supercooling effect can be obtained by fully demonstrating the capacity of the heat exchanger, and the effect of increasing the cooling performance by installing the heat exchanger can be maximized.

  Also, during heating operation, the performance equivalent to the first internal space is exhibited to suppress the heat exchanger performance, preventing the temperature of the refrigerant flowing into the leeward heat exchanger from becoming too low, and reducing the leeward heat It is possible to avoid a decrease in heating performance due to the low pressure of the refrigerant flowing into the exchanger.

  Furthermore, in the air conditioning / heating air conditioning system of the present invention, it is preferable that the first internal space is disposed in the vicinity of a refrigerant inlet of the heat exchanger installed on the leeward side, and the heat exchange installed on the windward side. It is preferable that the ventilation area of the vessel is equal to or greater than the ventilation area of the heat exchanger installed on the leeward side.

  Since the ventilation area of the heat exchanger installed on the leeward side is equal to or larger than the ventilation area of the heat exchanger installed on the leeward side, it is possible to prevent drift of the passing air accompanying the heat exchange. In addition, since the leeward heat exchanger portion (corresponding to the first internal space) used for heating is arranged in the vicinity of the refrigerant inlet of the leeward heat exchanger, the leeward heat exchanger is most frosted. The frost formation effect is intensively obtained in the easy part, and the improvement of the heating capacity due to the frost formation effect, which is one of the purposes of providing the heat exchanger, can be ensured.

  According to the present invention, it is possible to provide a heat exchanger and an air conditioning / air conditioning system using the heat exchanger that can achieve both favorable air conditioning performance and energy saving characteristics in each of cooling operation and heating operation.

  More specifically, according to the heat exchanger of the present invention, it is possible to provide a heat exchanger whose capacity can be easily changed as necessary. Further, according to the air conditioning and air conditioning system of the present invention, the capacity of the heat exchanger installed on the windward side is appropriately changed between the cooling operation and the heating operation, so that the cooling performance and the heating performance can be maximized. An air conditioning system can be provided.

It is a schematic block diagram of the heat exchanger which concerns on one Embodiment of this invention. It is a schematic block diagram of the heat exchanger which concerns on one Embodiment of this invention (at the time of air_conditionaing | cooling operation). It is a schematic block diagram of the heat exchanger which concerns on one Embodiment of this invention (at the time of heating operation). It is a schematic block diagram which shows the refrigerant circuit at the time of the air_conditionaing | cooling operation of the air conditioning system of this invention. It is a schematic block diagram which shows the refrigerant circuit at the time of the heating operation of the air-conditioning / air-conditioning system of this invention. It is a diagram which shows the various characteristics at the time of the heating operation of a general air conditioning air conditioning system. It is a diagram which shows the various characteristics at the time of the heating operation of the air-conditioning / air-conditioning system of this invention (operating at 100% of the total capacity of an upwind heat exchanger). It is a diagram which shows the various characteristics at the time of the heating driving | operation of the air-conditioning / air-conditioning system of this invention (operating with 50% of the total capacity of an upwind heat exchanger). It is a diagram which shows the various characteristics at the time of air_conditionaing | cooling operation of a general air-conditioning / air conditioning system. It is a diagram which shows the various characteristics at the time of air_conditionaing | cooling operation of the air-conditioning / air-conditioning system of this invention (operating at 100% of the total capacity of an upwind heat exchanger).

  DESCRIPTION OF EMBODIMENTS Hereinafter, representative embodiments of a heat exchanger of the present invention and an air conditioning / air conditioning system using the same will be described in detail with reference to the drawings, but the present invention is not limited to these. In the following description, the same or corresponding parts are denoted by the same reference numerals, and redundant description may be omitted. Further, since the drawings are for conceptually explaining the present invention, the dimensions and ratios of the components shown may be different from the actual ones.

[A] Heat Exchanger FIG. 1 is a schematic configuration diagram of a heat exchanger (variable capacity heat exchanger) according to an embodiment of the present invention. The variable capacity heat exchanger 1 of this embodiment includes a main body 2 made of a general aluminum alloy heat exchanger, a partition plate 4, a branch pipe 6, a collecting pipe 8, and refrigerant inlets 10 and 12. The refrigerant outlets 14 and 16 and the opening and closing mechanisms 18 and 20 are provided.

  For the main body 2 formed of an aluminum alloy heat exchanger, various conventionally known aluminum heat exchangers can be used as long as the effects of the present invention are not impaired. -A tube type heat exchanger or a parallel flow type heat exchanger can be used.

  A main body 2 of the variable capacity heat exchanger 1 of the present embodiment shown in FIG. 1 is formed of a parallel flow type heat exchanger, and is made of aluminum alloy header pipes 22 and 24 and parallel to each other communicating with the header pipes 22 and 24. It is mainly composed of a plurality of flat heat exchangers 26 made of, for example, an extruded shape member and made of aluminum alloy and corrugated fins 28 made of aluminum alloy interposed between adjacent flat heat exchangers 26.

  The internal space of the main body 2 is divided into two parts, a first internal space (internal space 1) and a second internal space (internal space 2) by four partition plates 4, and the internal volume of the internal space is divided into two. Has been. Refrigerant inlets (first refrigerant inlet 10 and second refrigerant inlet 12) and refrigerant outlets are respectively provided in the internal spaces (first internal space and second internal space) partitioned by the partition plate 4. (A first refrigerant outlet 14 and a second refrigerant outlet 16) are provided.

  Further, the variable capacity heat exchanger 1 includes a branch pipe 6 that communicates from a refrigerant pipe (not shown) to the first refrigerant inlet 10 and the second refrigerant inlet 12, and a first refrigerant outlet 14. And a collecting pipe 8 communicating with the refrigerant pipe from the second refrigerant outlet 16, and a first opening / closing mechanism 18 is provided between the branch portion of the branch pipe 6 and the first refrigerant inlet 10. The second opening / closing mechanism 20 is provided between the collecting portion of the collecting pipe 8 and the first refrigerant outlet 14.

  When both the first opening / closing mechanism 18 and the second opening / closing mechanism 20 are opened, the refrigerant can be circulated in all the internal spaces (the first internal space and the second internal space) of the main body 2 (FIG. 2). The refrigerant circulates in the gray portion of the entire variable capacity heat exchanger 1), and when the first opening / closing mechanism 18 and the second opening / closing mechanism 20 are both closed, the first of the variable capacity heat exchanger 1 is The refrigerant can be circulated only in the internal space (see FIG. 3: the refrigerant circulates in the gray portion which is the lower half of the variable heat capacity heat exchanger 1).

  Here, in the present embodiment, the first internal space and the second internal space have the same volume. That is, in FIG. 1 and the like, the first internal space is an internal space corresponding to a portion of 50% from the lower side in the vertical direction of the variable capacity heat exchanger 1 (main body 2). As will be described later, this first internal space faces the lower part of the leeward heat exchanger that is likely to form frost during heating operation (winter season) when it is arranged in parallel with the leeward heat exchanger in the air conditioning air conditioning system. Arranged.

  Therefore, in this case, in the variable capacity heat exchanger 1, the sizes of the internal spaces (first internal space and second internal space) divided by the partition plate 4 are variable capacity heat exchange used during heating operation. What is necessary is just to design from the optimal capacity of the vessel 1. Since the part that forms frost may differ depending on the leeward side heat exchanger, in that case, the position of the partition plate 4 is appropriately changed, and the volume of the first internal space is changed to, for example, the variable capacity heat exchanger 1 (main body You may design so that it may correspond to a 20%-50%, 20%-30% part from the vertical direction lower side of 2).

[B] Air-conditioning / air-conditioning system Next, the air-conditioning / air-conditioning system of the present embodiment is an air-conditioning / air-conditioning system in which heat exchangers are provided on the windward side and the leeward side of the outdoor air passage, and is installed on the windward side. The heat exchanger is a variable capacity heat exchanger 1 according to the above embodiment. FIG. 4 and FIG. 5 show schematic configuration diagrams showing refrigerant circuits during cooling operation and heating operation, respectively.

  The air conditioning and air conditioning system of the present embodiment has a variable capacity heat exchanger 1 and a leeward side heat that are arranged in parallel on the leeward side and leeward side with respect to the outside air ventilation path in a positional relationship in which the main surface is substantially parallel to the vertical direction. An outdoor unit heat exchanger 32 including the exchanger 30 is provided. In addition, the branch pipe 6 connected to the first refrigerant inlet 10 and the second refrigerant inlet 12 provided in the variable capacity heat exchanger 1 installed on the windward side, and the variable capacity heat exchanger 1 are provided. The collecting pipe 8 connected to the first refrigerant outlet 14 and the second refrigerant outlet 16, the expansion mechanism (for example, the expansion valve EV) interposed in the collecting pipe 8, the branch pipe 6 and the collecting pipe 8 And a first branch pipe and a second branch pipe that are connected in parallel to each other.

  Further, a check valve mechanism 34, which will be described later, consisting of a total of four check valves CV1, CV2, CV3, and CV4 interposed between the first branch pipe and the second branch pipe, and 2 in the first branch pipe. Between the two check valves CV1 and CV2 and the refrigerant inlet / outlet at the lower end of the leeward heat exchanger 30; between the two check valves CV3 and CV4 in the second branch pipe; And a first indoor side pipe 40 connected to the machine heat exchanger 38.

  The second indoor pipe 42 connecting the leeward heat exchanger 30 and the indoor heat exchanger 38 is provided with a four-way valve DV and a compressor 44 in order from the leeward heat exchanger 30 side. The high-temperature and high-pressure refrigerant discharged from the compressor 44 flows through the indoor unit heat exchanger 38 or the leeward heat exchanger 30 of the outdoor unit heat exchanger 32 by switching the four-way valve DV. It has become.

  The check valve mechanism 34 is interposed in series with one of the first branch pipe and the second branch pipe parallel to each other, that is, the first branch pipe connecting the refrigerant inlet pipe and the refrigerant outlet pipe. The first check valve CV1 and the second check valve CV2, and the third check valve CV3 and the fourth check valve CV4 which are provided in series with the other branch pipe, that is, the second branch pipe. The four check valves are configured. In this case, the check valves CV1 to CV4 block the flow from the refrigerant inlet side to the refrigerant outlet side, and the secondary side has a higher pressure than the primary side of the refrigerant flowing in the first and second branch pipes. Sometimes it has the function of blocking the flow.

  In the check valve mechanism 34 formed as described above, the refrigerant outflow inlet at the lower end of the leeward side heat exchanger 30 between the first check valve CV1 and the second check valve CV2 in the first branch pipe. Are connected by an outdoor tube 36. In addition, the first indoor side pipe 40 connects between the third check valve CV3 and the fourth check valve CV4 in the second branch pipe and the indoor side heat exchanger 38.

  As described in [A] above, in the variable capacity heat exchanger 1, the size of each of the internal spaces (first internal space and second internal space) divided by the partition plate 4 is determined during heating operation. It can design from the optimal capacity | capacitance of the heat exchanger 2 to be used. Further, the portion of the variable capacity heat exchanger 1 installed on the windward side through which the refrigerant flows during the heating operation overlaps with the vicinity of the low-pressure refrigerant inlet (the refrigerant inlet 12) of the leeward heat exchanger 30 (that is, the refrigerant inlet 12). It is preferable to design the arrangement so as to face each other.

  The ventilation area of the variable capacity heat exchanger 1 installed on the windward side is preferably equal to or larger than the ventilation area of the leeward heat exchanger 30. By setting the ventilation area of the variable capacity heat exchanger 1 installed on the windward side to be equal to or larger than the ventilation area of the leeward heat exchanger 30, the level of ventilation resistance is suppressed, and the drift of the passing air accompanying the heat exchange 2 is provided. Can be prevented.

  Next, regarding the air conditioning / air conditioning system of the present invention, operations during cooling operation and heating operation will be described.

<During cooling operation>
During the cooling operation, as indicated by an arrow in FIG. 4, the refrigerant that has passed through the expansion valve EV (expansion mechanism) and reduced in pressure by adiabatic expansion passes through the fourth check valve CV4 of the check valve mechanism 34, It flows into the indoor heat exchanger 38 and is evaporated. At this time, the second check valve CV2 and the third check valve CV3 do not function as flow paths because the valve back is filled with high-pressure refrigerant.

  The refrigerant that has passed through the indoor heat exchanger 38 passes through the four-way valve DV → the compressor 44 → the leeward heat exchanger 30 and passes through the outdoor pipe 36 to the first check valve CV1 in the first branch pipe. And the second check valve CV2. The refrigerant that has returned to the check valve mechanism 34 passes through the first check valve CV1. At this time, the second check valve CV2 and the third check valve CV3 do not function as flow paths because of the check function of the valves.

  The refrigerant (that is, the high-temperature condensate) that has passed through the first check valve CV1 is the first refrigerant inlet 10 and the second refrigerant inlet 12 at the upper end of the variable capacity heat exchanger 1 installed on the windward side. And flows in the direction of gravity (from top to bottom) through the second internal space and the first internal space. Thereby, the variable capacity heat exchanger 1 functions as a subcooler, and the passage resistance value of the variable capacity heat exchanger 1 can be suppressed to the minimum, so that the operation efficiency can be improved.

  During the cooling operation, both the first opening / closing mechanism 18 and the second opening / closing mechanism 20 are opened, and the refrigerant is placed in the entire internal space (the first internal space and the second internal space) of the variable capacity heat exchanger 1. Circulate. As a result, the maximum supercooling effect can be obtained by utilizing the entire capacity of the variable capacity heat exchanger 1 during the cooling operation, and the cooling by providing the variable capacity heat exchanger 1 together. The effect of increasing performance can be maximized.

<During heating operation>
During the heating operation, as indicated by an arrow in FIG. 5, the refrigerant that has passed through the expansion valve EV (expansion mechanism) and has been reduced in pressure by adiabatic expansion passes through the second check valve CV <b> 2 of the check valve mechanism 34, It flows to the leeward side heat exchanger 30 and is evaporated. At this time, the first check valve CV1 and the fourth check valve CV4 do not function as flow paths because the valve back is filled with high-pressure refrigerant.

  The refrigerant that has passed through the leeward side heat exchanger 30 passes through the four-way valve DV → the compressor 44 → the indoor side heat exchanger 38, and passes through the first indoor side pipe 40 to the third reverse pipe in the second branch pipe. It flows between the stop valve CV3 and the fourth check valve CV4. The refrigerant that has returned to the check valve mechanism 34 passes through the third check valve CV3. At this time, the first check valve CV1 and the fourth check valve CV4 do not function as flow paths due to the check function of the valves.

  The refrigerant (that is, the high-temperature condensate) that has passed through the third check valve CV3 travels in the direction of gravity (from top to bottom) from the second refrigerant inlet 12 at the upper end of the variable capacity heat exchanger 1 installed on the windward side. Flowing. Thereby, since the passage resistance value of the variable capacity heat exchanger 1 can be suppressed to the minimum, the operation efficiency can be improved.

  During the heating operation, both the first opening / closing mechanism 18 and the second opening / closing mechanism 20 are closed, and the refrigerant is circulated only in a part of the internal space of the variable capacity heat exchanger 1 (first internal space). As a result, the capacity of the variable capacity heat exchanger 1 corresponding to only a part of the internal space (first internal space) can be exhibited during the heating operation. By designing the heat exchange capacity corresponding to a part of the internal space (first internal space) from the optimum capacity of the variable capacity heat exchanger 1 used during the heating operation, the refrigerant flowing into the leeward heat exchanger 30 is designed. It is possible to prevent the temperature from becoming too low, and to avoid a decrease in heating performance due to the low pressure of the refrigerant flowing into the leeward heat exchanger 30.

  As the first opening / closing mechanism 18 and the second opening / closing mechanism 20, various conventionally known opening / closing mechanisms can be used as long as the effects of the present invention are not impaired. For example, a switch type that senses a cooling / heating operation mode. An open / close mechanism that measures use environment information from an open / close mechanism or an outside air temperature sensor and determines the open / close timing can be used.

  In addition, as described above, according to the heat exchanger for outdoor units according to the present invention, the control of one expansion valve EV (expansion mechanism) and the check valve mechanism 34 can be used during either the cooling operation or the heating operation. Since the flow direction of the refrigerant into the variable capacity heat exchanger 1 installed on the windward side can be made constant, piping can be simplified, operation control can be facilitated, and operation efficiency can be improved.

  Next, with reference to FIG. 6, FIG. 7 and FIG. 8, the effect at the time of heating operation when the air conditioning system of the present invention is used will be described using examples.

  FIG. 6 is a diagram showing various characteristics during a heating operation of a general cooling / heating air conditioning system. The air-conditioning system used was a commercially available Japanese 3-horsepower air conditioner (new) without any modification. The outside air temperature at the time of measurement was about 5 ° C., and the refrigerant filling amount was 2.95 kg.

  FIG. 7 is a diagram showing various characteristics at the time of heating operation of the cooling / heating air conditioning system of the present invention when operating at 100% of the total volume of the variable infant heat exchanger 1 on the windward side. The variable capacity heat exchanger 1 of the above embodiment was added as a windward heat exchanger to the above-mentioned commercially available Japanese 3-horsepower air conditioner (new) and operated at 100% of the total internal volume of the variable capacity heat exchanger 1. . The outside air temperature at the time of measurement was about 7 ° C., and the refrigerant filling amount was 3.95 kg.

  FIG. 8 is a diagram showing various characteristics at the time of heating operation of the air conditioning / air conditioning system of the present invention when operating at 50% of the total capacity of the variable capacity heat exchanger 1 on the windward side. The variable capacity heat exchanger 1 of the above embodiment was added as a windward heat exchanger to the above-mentioned commercially available Japanese 3-horsepower air conditioner (new) and operated at 50% of the total internal volume of the variable capacity heat exchanger 1. . The outside air temperature at the time of measurement was about 8 ° C., and the refrigerant filling amount was 3.45 kg.

  The frosting time when a commercially available Japanese 3-horsepower air conditioner (new), a variable capacity heat exchanger 1 is additionally installed (100% operation), and a variable capacity heat exchanger 1 is additionally installed (50% operation) is 176 minutes, 143 minutes and 180 minutes, respectively. The frosting time when the variable capacity heat exchanger is operated at 100% is shorter than that of a commercially available Japanese 3-horsepower air conditioner (new). The frosting time was longer than that of the Japanese 3-horsepower air conditioner (new).

  Next, with reference to FIG.9 and FIG.10, the effect at the time of the air_conditionaing | cooling operation at the time of using the air conditioning system of this invention is demonstrated.

  FIG. 9 is a diagram showing various characteristics during cooling operation of a general air conditioning / air conditioning system. The air-conditioning system used was a commercially available Japanese 3-horsepower air conditioner (new) without any modification. The outside air temperature at the time of measurement was about 42.7 ° C., and the refrigerant filling amount was 2.95 kg.

  FIG. 10 is a diagram showing various characteristics during the cooling operation of the cooling / heating air-conditioning system of the present invention when operated at 100% of the total volume of the variable capacity heat exchanger 1 on the windward side. The variable capacity heat exchanger 1 of the above embodiment was added as a windward heat exchanger to the above-mentioned commercially available Japanese 3-horsepower air conditioner (new) and operated at 100% of the total internal volume of the variable capacity heat exchanger 1. . The outside air temperature at the time of measurement was about 42.3 ° C., and the refrigerant filling amount was 3.45 kg.

  As can be seen from FIGS. 9 and 10, when the variable capacity heat exchanger 1 is additionally installed (100% operation) compared to a commercially available Japanese 3-horsepower air conditioner (new), the room temperature is lowered with less power consumption. I was able to.

  The representative embodiments and examples of the present invention have been described above. However, the present invention is not limited to these embodiments, and various design changes are possible. Included in the range.

1 ... Variable capacity heat exchanger,
2 ... Body
4 ... partition plate,
6 ... Branch pipe,
8 ... collecting pipe,
10: First refrigerant inlet,
12 ... second refrigerant inlet,
14: First refrigerant outlet,
16 ... second refrigerant outlet,
18: First opening / closing mechanism,
20 ... Second opening / closing mechanism,
22, 24 ... header pipe,
26: flat heat exchanger,
28 ... corrugated fin,
30 ... leeward heat exchanger,
32 ... heat exchanger for outdoor unit,
34. Check valve mechanism,
36 ... outdoor pipe,
38 ... heat exchanger for indoor unit,
40: first indoor pipe,
42 ... second indoor side pipe,
44: Compressor.

Claims (5)

A heat exchanger having a first internal space and a second internal space divided into two by providing a partition in the internal space,
A first refrigerant inlet and a second refrigerant inlet, a first refrigerant outlet and a second refrigerant outlet provided in each of the first internal space and the second internal space;
A branch pipe communicating from the refrigerant pipe to the first refrigerant inlet and the second refrigerant inlet;
A collecting pipe communicating from the first refrigerant outlet and the second refrigerant outlet to the refrigerant pipe;
A first opening / closing mechanism provided between a branch portion of the branch pipe and the first refrigerant inlet;
A second opening / closing mechanism provided between a collecting portion of the collecting pipe and the first refrigerant outlet;
Having
A heat exchanger characterized by   It is an air-conditioning / air conditioning system in which heat exchangers are provided on the windward side and the leeward side with respect to the outside air passage, and the heat exchanger installed on the windward side is the heat exchanger according to claim 1. , Featuring air conditioning system. During the cooling operation, the first opening / closing mechanism and the second opening / closing mechanism are both opened, and the refrigerant is circulated through the entire internal space of the heat exchanger, and during the heating operation, the first opening / closing mechanism and the Closing both the second opening and closing mechanism and circulating the refrigerant only in the first internal space of the heat exchanger;
The air conditioning air conditioning system according to claim 2.   The air conditioning system according to claim 2 or 3, wherein the first internal space is arranged in the vicinity of a refrigerant inlet of the heat exchanger installed on the leeward side.   5. The air conditioning system according to claim 2, wherein a ventilation area of the heat exchanger installed on the windward side is equal to or larger than a ventilation area of the heat exchanger installed on the leeward side. .