JP2009275970A - Refrigerating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerating apparatus capable of reducing the installation space of water heat exchangers while improving performance by reducing the pressure loss of a refrigerant in the water heat exchangers. <P>SOLUTION: The refrigerating apparatus comprises a compressor 1, an air heat exchanger 2, an expansion mechanism 3 and two plate-type water heat exchangers 4. The two water heat exchangers 4 are arranged in a vertical direction. In the adjacent water heat exchangers 4, 4, an upper refrigerant passage port of the lower water heat exchanger 4 and a lower refrigerant passage port of the upper water heat exchanger 4 are connected to each other through a refrigerant passage 10. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a refrigeration apparatus such as an air cooling heat pump chiller.

  Conventionally, as shown in FIG. 6, a refrigeration apparatus includes a compressor 101, an air heat exchanger 102, an expansion valve 103, and a plurality of plate-type water heat exchangers 104 (Japanese Patent Application Laid-Open No. 2005-260707). 2005-337688 gazette: Refer patent document 1).

  The compressor 101, the air heat exchanger 102, the expansion valve 103, and the plurality of water heat exchangers 104 are sequentially connected in an annular shape via the refrigerant flow path 110. The plurality of water heat exchangers 104 are connected in series via the refrigerant flow path 110.

  The refrigerant flow path 110 is provided with a four-way valve 105 that changes the flow of the refrigerant during the cooling operation and the heating operation. The water heat exchanger 104 is provided with a water flow path 120.

  The refrigerant flow of this refrigeration apparatus will be described. During the cooling operation, the refrigerant compressed by the compressor 101 is, in order, the four-way valve 105, the air heat exchanger 102, the expansion valve 103, and water as indicated by the solid line arrows. It returns to the compressor 101 through the heat exchanger 104. At this time, the air heat exchanger 102 serves as a condenser, and the water heat exchanger 104 serves as an evaporator.

  On the other hand, during the heating operation, as indicated by the one-dot chain line arrow, the refrigerant compressed by the compressor 101 sequentially passes through the four-way valve 105, the water heat exchanger 104, the expansion valve 103, and the air heat exchanger 102. Return to the compressor 101. At this time, the air heat exchanger 102 serves as an evaporator, and the water heat exchanger 104 serves as a condenser.

  As shown in FIG. 7, each water heat exchanger 104 has a lower refrigerant passage port 104a and an upper refrigerant passage port 104b. In addition, in FIG. 7, the flow of the refrigerant | coolant and water when the water heat exchanger 104 acts with an evaporator is shown.

The plurality of water heat exchangers 104 are arranged in the horizontal direction. In the adjacent water heat exchangers 104, 104, the refrigerant passage port 104 b above the left water heat exchanger 104 and the refrigerant passage port 104 a below the right water heat exchanger 104 are connected to the refrigerant passage 110. Is connected through.
JP 2005-337688 A

  However, in the conventional refrigeration apparatus, in the water heat exchangers 104 and 104 adjacent to each other in the lateral direction, the upper refrigerant passage 104b of the left water heat exchanger 104 and the lower side of the right water heat exchanger 104 are arranged. Since the refrigerant flow passage port 104a is connected to the refrigerant flow passage port 104a via the refrigerant flow passage 110, the refrigerant flow passage 110 connecting the adjacent water heat exchangers 104 and 104 becomes longer, and the pressure loss of the refrigerant increases. There is a problem that the performance decreases. Moreover, the floor area for installing all the water heat exchangers 104 is required, and there is a problem that the installation space becomes large.

  Then, the subject of this invention is providing the refrigerating apparatus which can reduce the pressure loss of the refrigerant | coolant in a water heat exchanger, can improve performance, and can reduce the installation space of a water heat exchanger.

In order to solve the above problems, the refrigeration apparatus of the present invention provides:
A compressor,
An air heat exchanger,
An expansion mechanism;
With a plurality of plate-type water heat exchangers,
The compressor, the air heat exchanger, the expansion mechanism, and the plurality of plate-type water heat exchangers are sequentially connected in a ring shape via a refrigerant flow path,
Each of the plate-type water heat exchangers has a lower refrigerant channel port and an upper refrigerant channel port,
The plurality of plate type water heat exchangers are arranged in the vertical direction,
In the adjacent plate type water heat exchanger, the upper refrigerant channel port of the lower plate type water heat exchanger and the lower refrigerant channel port of the upper plate type water heat exchanger are: It is connected through the refrigerant flow path.

  According to the refrigeration apparatus of the present invention, the plurality of plate-type water heat exchangers are arranged in the vertical direction, and in the adjacent plate-type water heat exchanger, the lower plate-type water heat exchanger is configured as described above. Since the upper refrigerant flow path opening and the lower refrigerant flow path opening of the upper plate type water heat exchanger are connected via the refrigerant flow path, the adjacent plate type water heat exchangers are connected. Can be shortened, the pressure loss of the refrigerant can be reduced, and the performance can be improved. Moreover, the floor area for installing the plurality of plate-type water heat exchangers is sufficient with only one plate-type water heat exchanger, and the installation space for the plate-type water heat exchanger can be reduced.

  In one embodiment, the plurality of plate type water heat exchangers are coupled to each other via a side plate.

  According to the refrigeration apparatus of this embodiment, the plurality of plate-type water heat exchangers are coupled to each other via the side plates, so that the plurality of plate-type water heat exchangers can be integrated. Further, the side plate can be fixed to the heat transfer plate of the plate-type water heat exchanger with, for example, bolts, and the integration of the plurality of plate-type water heat exchangers becomes easy.

  Further, in the refrigeration apparatus of one embodiment, the plate-type water heat exchanger causes the refrigerant when the plate-type water heat exchanger acts as an evaporator to flow from the lower refrigerant passage to the upper refrigerant flow. It is configured to flow to the roadway.

  According to the refrigeration apparatus of this embodiment, the plate-type water heat exchanger transfers the refrigerant when the plate-type water heat exchanger acts as an evaporator from the lower refrigerant flow port to the upper refrigerant flow. Since it is configured to flow to the roadway, heat exchange between the refrigerant and water can be performed efficiently.

  According to the refrigeration apparatus of the present invention, the plurality of plate-type water heat exchangers are arranged in the vertical direction, and in the adjacent water heat exchanger, the upper refrigerant flow of the lower water heat exchanger is arranged. Since the passage opening and the lower refrigerant passage opening of the upper water heat exchanger are connected via the refrigerant passage, the pressure loss of the refrigerant in the water heat exchanger is reduced and performance is improved. It can be improved and the installation space for the water heat exchanger can be reduced.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

(First embodiment)
FIG. 1 shows a simplified configuration diagram as a first embodiment of the refrigeration apparatus of the present invention. This refrigeration apparatus includes a compressor 1, an air heat exchanger 2, an expansion valve 3 (as an expansion mechanism), and two plate-type water heat exchangers 4.

  The compressor 1, the air heat exchanger 2, the expansion valve 3, and the two water heat exchangers 4 are sequentially connected in a ring shape via a refrigerant flow path 10 (such as a pipe). The two water heat exchangers 4 are connected in series via the refrigerant flow path 10.

  The refrigerant flow path 10 is provided with a four-way valve 5 (as a flow path switching valve). The four-way valve 5 changes the flow of the refrigerant in the refrigerant flow path 10 during the cooling operation and the heating operation.

  The air heat exchanger 2 is provided with a fan, and performs heat exchange between the air sent by the fan and the refrigerant flowing through the refrigerant flow path 10.

  The two water heat exchangers 4 are provided with a water flow path 20 (such as a pipe) that connects the two water heat exchangers 4 in series. Water flowing through the water flow path 20 and refrigerant flowing through the refrigerant flow path 10 Exchange heat with.

  The refrigerant flow of this refrigeration apparatus will be described. During the cooling operation, the refrigerant compressed by the compressor 1 is in order of the four-way valve 5, the air heat exchanger 2, the expansion valve 3, as indicated by the solid line arrows. The water heat exchanger 4 and the other water heat exchanger 4 are returned to the compressor 1. At this time, the air heat exchanger 2 serves as a condenser, and the two water heat exchangers 4 serve as evaporators.

  On the other hand, during heating operation, the refrigerant compressed by the compressor 1 is in order of the four-way valve 5, the other water heat exchanger 4, the one water heat exchanger 4, and the expansion valve, as indicated by the one-dot chain line arrow. 3 and the air heat exchanger 2 are returned to the compressor 1. At this time, the air heat exchanger 2 becomes an evaporator, and the two water heat exchangers 4 become condensers.

  As shown in FIG. 2, each water heat exchanger 4 has a lower refrigerant channel port 4a, an upper refrigerant channel port 4b, a lower water channel port 4c, and an upper water channel port 4d.

  The lower coolant channel port 4a and the upper coolant channel port 4b, and the lower water channel port 4c and the upper water channel port 4d are provided on opposite surfaces.

  As shown in FIG. 3, the two water heat exchangers 4 are arranged in the vertical direction so as to overlap each other in series. The two water heat exchangers 4 are arranged so that the refrigerant flow passage ports 4a and 4b of the upper water heat exchanger 4 and the refrigerant flow passage ports 4a and 4b of the lower water heat exchanger 4 face the same direction. Has been placed.

  In the adjacent water heat exchangers 4, 4, the refrigerant flow path port 4 b on the upper side of the lower water heat exchanger 4 and the refrigerant flow path port 4 a on the lower side of the upper water heat exchanger 4 are connected to the refrigerant flow path 10. The upper water flow path port 4d of the lower water heat exchanger 4 and the lower water flow path port 4c of the upper water heat exchanger 4 are connected via the water flow path 20. Yes.

  The lower refrigerant flow path port 4a of the lower water heat exchanger 4 and the upper refrigerant flow path port 4b of the upper water heat exchanger 4 are connected to the refrigerant flow path 10, respectively. The lower water channel port 4c of the lower water heat exchanger 4 and the upper water channel port 4d of the upper water heat exchanger 4 are connected to the water channel 20, respectively.

  In FIG. 3, the flow of the refrigerant and water when the water heat exchanger 4 acts with the evaporator is shown, and the water heat exchanger 4 shows the refrigerant when the water heat exchanger 4 acts as the evaporator at the lower side. The refrigerant channel port 4a is configured to flow from the refrigerant channel port 4b to the upper refrigerant channel port 4b.

  The two water heat exchangers 4 are coupled to each other via a side plate 6 indicated by a virtual line. The side plates 6 are attached to the surface provided with the refrigerant flow path ports 4a and 4b and the surface provided with the water flow path ports 4c and 4d, respectively. The side plate 6 is fixed to the heat transfer plate of the water heat exchanger 4 with bolts or the like, for example. The side plate 6 fixes the two water heat exchangers 4 integrally and is fixed to the floor surface.

  As shown in FIG. 4, the water heat exchanger 4 includes a plurality of stacked heat transfer plates 40. A refrigerant flow passage 50 and a water flow passage 60 are alternately formed between the adjacent heat transfer plates 40 and 40. In each heat transfer plate 40, a refrigerant inflow path 51 and an outflow path 52 that communicate only with the refrigerant flow path 50, and a water inflow path 61 and an outflow path 62 that communicate only with the water flow path 60 are formed. In addition, in FIG. 4, the case where the water heat exchanger 4 acts as an evaporator is shown.

  Specifically, the heat transfer plate 40 is made of a metal flat plate, and the peripheral portions of the heat transfer plates 40 abut on each other between adjacent heat transfer plates 40, 40, and the peripheral portions are brazed. Are integrally formed. In FIG. 4, the gap between adjacent heat transfer plates 40, 40 is drawn larger than the actual one, and the number of heat transfer plates 40 is reduced.

  A hole 41 is provided at each of the four corners of each heat transfer plate 40, and a seal 42 is appropriately provided around the hole 41. The hole 41 and the seal portion 42 form a refrigerant inflow path 51 and an outflow path 52, and a water inflow path 61 and an outflow path 62.

  The refrigerant sequentially flows through the inflow path 51, the refrigerant flow path 50, and the outflow path 52 as indicated by the solid line arrows, and the water sequentially flows through the inflow path 61 and the water flow path 60 as indicated by the dotted line arrows. The refrigerant flowing through the refrigerant flow passage 50 and the water flowing through the water flow passage 60 exchange heat with each other.

  The refrigerant inflow path 51 communicates with the lower refrigerant flow path port 4a, the refrigerant outflow path 52 communicates with the upper refrigerant flow path port 4b, and the water inflow path 61 communicates with the upper water flow path port 4d. The water outflow passage 62 is in communication with the lower water passage opening 4c.

  According to the refrigeration apparatus having the above-described configuration, the two water heat exchangers 4 are arranged in the vertical direction, and in the adjacent water heat exchangers 4, 4, the refrigerant passage port on the upper side of the lower water heat exchanger 4. 4b and the lower refrigerant flow path port 4a on the upper water heat exchanger 4 are connected via the refrigerant flow path 10, so that the refrigerant flow path connecting the adjacent water heat exchangers 4 and 4 is connected. 10 can be shortened, pressure loss of the refrigerant can be reduced, and performance can be improved. Moreover, the floor area for installing the two water heat exchangers 4 is sufficient with only one water heat exchanger 4, and the installation space for the water heat exchanger 4 can be reduced.

  Moreover, since the two water heat exchangers 4 are mutually connected through the side plate 6, the two water heat exchangers 4 can be integrated. Further, the side plate 6 can be fixed to the heat transfer plate 40 of the water heat exchanger 4 with, for example, bolts, and the two water heat exchangers 4 can be easily integrated.

  On the other hand, when a heat pipe is used as a heat exchanger, the side plate 6 cannot be fixed to the pipe with, for example, a bolt, so that the heat pipe cannot be arranged integrally in the vertical direction.

  Further, the water heat exchanger 4 is configured to flow the refrigerant when the water heat exchanger 4 acts as an evaporator from the lower refrigerant channel port 4a to the upper refrigerant channel port 4b. Heat exchange with water.

(Second Embodiment)
FIG. 5 shows a second embodiment of the refrigeration apparatus of the present invention. The difference from the first embodiment will be described. In the second embodiment, the arrangement of the water heat exchanger is different. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, the two water heat exchangers 4 are arranged in the vertical direction. The two water heat exchangers 4 are arranged such that the upper refrigerant flow passage port 4b of the upper water heat exchanger 4 and the lower refrigerant flow passage port 4a of the lower water heat exchanger 4 face each other. Has been placed.

  Therefore, the refrigerant flow path 10 connecting the upper refrigerant flow path port 4b of the upper water heat exchanger 4 and the lower refrigerant flow path port 4a of the lower water heat exchanger 4 can be further shortened. The pressure loss can be further reduced.

  In addition, this invention is not limited to the above-mentioned embodiment. For example, the expansion mechanism may be a capillary tube other than the expansion valve 3. In addition to the four-way valve 5, other valves may be used as the flow path switching valve. In addition, the number of water heat exchangers can be increased or decreased, and a plurality of water heat exchangers may be arranged in the vertical direction.

It is a simplified lineblock diagram showing a 1st embodiment of a refrigerating device of the present invention. It is a side view of a plate type water heat exchanger. It is a simplified block diagram of a water heat exchanger. It is a disassembled perspective view of a water heat exchanger. It is a simplified block diagram which shows 2nd Embodiment of the freezing apparatus of this invention. It is a simplified block diagram which shows the conventional freezing apparatus. It is a simplified block diagram of a plate type water heat exchanger.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compressor 2 Air heat exchanger 3 Expansion valve (expansion mechanism)
4 plate type water heat exchanger 4a (lower) refrigerant channel port 4b (upper) refrigerant channel port 4c (lower) water channel port 4d (upper) water channel port 5 four-way valve (channel switching valve)
6 side plate 10 refrigerant flow path 20 water flow path 40 heat transfer plate 50 refrigerant flow path 51 (refrigerant) inflow path 52 (refrigerant) outflow path 60 water flow path 61 (water) inflow path 62 (water) outflow path

Claims (3)

A compressor (1);
An air heat exchanger (2);
An expansion mechanism (3);
A plurality of plate-type water heat exchangers (4),
The compressor (1), the air heat exchanger (2), the expansion mechanism (3), and the plurality of plate-type water heat exchangers (4) are annularly arranged in this order via a refrigerant channel (10). Connected to
Each of the plate-type water heat exchangers (4) has a lower refrigerant channel port (4a) and an upper refrigerant channel port (4b),
The plurality of plate-type water heat exchangers (4) are arranged in the vertical direction,
In the adjacent plate type water heat exchangers (4, 4), the upper refrigerant channel port (4b) of the lower plate type water heat exchanger (4) and the upper plate type water heat exchanger. (4) The lower refrigerant passage port (4a) of (4) is connected via the refrigerant passage (10). The refrigeration apparatus according to claim 1,
The plurality of plate-type water heat exchangers (4) are coupled to each other via side plates (6). The refrigeration apparatus according to claim 1 or 2,
The plate-type water heat exchanger (4) is configured to transfer refrigerant when the plate-type water heat exchanger (4) acts as an evaporator from the lower refrigerant channel port (4a) to the upper refrigerant channel port. A refrigeration apparatus configured to flow to (4b).

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