JP2012202577A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger capable of obtaining hot water of different temperatures while improving heat transfer performance by forming the flows of two kinds of fluids as counterflows, or formed with a plurality of heat exchangers in a single box.SOLUTION: The heat exchanger is adapted to exchange heat between one fluid flowing in a first passage 6 provided in a box 1 and the other fluid flowing in at least two second passages 10 arranged in the first passage 6. One passage out of the second passages 10 is arranged upstream in the first passage 6, and the other passage out of the second passages (passage tubes) 10 is arranged downstream in the first passage 6.

Description

  The present invention relates to a heat exchanger that exchanges heat between two types of fluids.

  As shown in FIGS. 8A and 8B, such a heat exchanger improves heat transfer performance by increasing the heat transfer area in the heat exchanger 100 that performs heat exchange between two kinds of fluids. In order to reduce the size, there is known (for example, Patent Document 1).

  That is, the two types of drawn plates 101a and 101b are joined to the peripheral wall 102a and 102b to form a thin rectangular box, and on the wall surface 104 of the corrugated channel member 103, the left and right alternating side end positions are placed. An opening 105 is formed, and the flow path member 103 is accommodated in the box with the upper and lower folded surfaces joined to the plates 101a and 101b, and the outlets 107a and 106b are opened from the inlets 106a and 106b opened to the peripheral edges 102a and 102b of the box. By forming a flow path 108 for one fluid (water) reaching 107b and attaching a narrow tube 111 having an inlet 109 and an outlet 110 for the other fluid (refrigerant) in a meandering manner on the outer surface of the box, The other fluid flow path is formed by joining to the plates 101a and 101b forming the box.

  However, since the flow path of the other fluid by the narrow tube 111 is formed outside the box with respect to the flow channel 108 formed in the box, the fluid flowing through the flow channel 108 and the other fluid flowing through the narrow tube 111 are also included. As a result, the heat transfer performance between one fluid and the other fluid could not be obtained. Therefore, it has been difficult to improve the heat transfer performance and further reduce the size of the heat exchanger.

  In addition, a flow path 108 extending from the inlets 106a and 106b to the outlets 107a and 107b is formed inside the box, and a flow path for the other fluid including the narrow tube 111 extending from the inlet 109 to the outlet 110 is formed. Therefore, for example, water as one fluid cannot be obtained from the flow path 108 as warm water having different temperatures heated in one stage or two stages.

  In addition, there is a problem that hot water having different temperatures such as hot water heated from low temperature to high temperature and hot water heated from low temperature to medium temperature cannot be obtained individually from the channel 108.

JP 2003-314975 A

  In view of the above problems, the present invention can improve the heat transfer performance by using two types of fluid flows as opposed flows, and can obtain hot water having different temperatures, or a plurality of heat exchanges in a single box. An object of the present invention is to provide a heat exchanger in which a vessel is formed.

  In order to achieve the above-described object, the present invention has the following features.

A heat exchanger that performs heat exchange between one fluid flowing in a first flow path provided in a box and the other fluid flowing in at least two second flow paths disposed in the first flow path. And
One flow path of the second flow path is disposed on the upstream side of the first flow path, and the other flow path of the second flow path is disposed on the downstream side of the first flow path. Yes.

Also, a heat exchanger that performs heat exchange between one fluid flowing in at least two first flow paths provided in the box and the other fluid flowing in the second flow path disposed in the first flow path. Because
The second flow path is arranged to communicate with at least two of the first flow paths.

Also, a heat exchanger that performs heat exchange between one fluid flowing in at least two first flow paths provided in the box and the other fluid flowing in the second flow path disposed in the first flow path. Because
The second flow path is arranged in at least two of the first flow paths, respectively.

  Further, the first flow path is formed in a meandering shape in the box.

  In addition, the first flow path is formed in a spiral shape in the box.

  In addition, the first flow path and the second flow path are configured such that the one fluid and the other fluid are opposed to each other.

  According to the present invention, it is possible to improve the heat transfer performance by using two types of fluids as opposed flows, to obtain hot water having different temperatures, or to form a plurality of heat exchangers in a single box. A heat exchanger can be provided.

It is explanatory drawing of 1st embodiment of the heat exchanger by this invention, (A) is explanatory drawing of an upper plate and a lower plate, (B) is AA sectional drawing shown in FIG. It is explanatory drawing which shows 1st embodiment of the heat exchanger by this invention, (A) is an exploded view, (B) is a schematic diagram which shows the flow of a fluid. It is explanatory drawing of 2nd embodiment of the heat exchanger by this invention, (A) is an exploded view, (B) is a schematic diagram which shows the flow of a fluid. It is explanatory drawing of 3rd embodiment of the heat exchanger by this invention, (A) is an exploded view, (B) is a schematic diagram which shows the flow of a fluid. It is explanatory drawing of 4th embodiment of the heat exchanger by this invention, (A) is explanatory drawing of an upper plate and a lower plate, (B) is BB sectional drawing shown in FIG. It is an exploded view which shows 4th embodiment of the heat exchanger by this invention. It is principal part explanatory drawing of the heat exchanger by this invention, (A) is a top view, (B) is sectional drawing, (C) is the figure seen from the downward | lower direction. It is explanatory drawing of the heat exchanger by a prior art example, (A) is a principal part disassembled perspective view, (B) is a top view.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail as examples based on the attached drawings.

The heat exchanger according to the present invention is of a type incorporated in, for example, a heat pump type water heater using a refrigerant as a heat source, and includes water that is one fluid and refrigerant that is the other fluid and serves as a heat source. By configuring so that heat can be efficiently exchanged between them and the size can be reduced, it is possible to supply hot water that has been effectively heated.

  As a configuration for that purpose, as shown in FIGS. 1 to 7, a thin box-shaped box 1 comprising an upper plate 21 and a lower plate 22 and having an inlet 4 and an outlet 5 for one fluid (water), First flow paths 6, 61, 62 that are bent in the interior of the box 1 so as to reach the outlet 5 from the inlet 4, and the other fluid (refrigerant) inlets 8, 81, 82 provided in the box 1, A second flow path 10 is provided which is in communication with the outlets 9, 91, 92, and is a flow path pipe installed in the first flow paths 6, 61, 62.

  2 to 4 and 6 are exploded views for explaining the heat exchanger. The second flow path 10 is installed in the first flow paths 6, 61, 62, and the first flow paths 6, 61, 62 are connected to each other. The flow of one fluid flowing (arrows A, A1, A2) and the flow of the other fluid flowing through the second flow path 10 (arrows B, B1, B2) are configured to face each other. .

  For example, in the heat exchanger 100 shown in FIG. 8A and FIG. 8B, water and the thin refrigerant tube 111 are not in direct contact with each other. Loss occurs. On the other hand, in the embodiment of the present invention, water and the second flow path 10 are in direct contact with each other in the first flow paths 6, 61, 62. It can be exchanged.

  In addition, since the water flowing through the first flow paths 6, 61, 62 and the refrigerant flowing through the second flow path 10 are configured to flow in opposition, the water and the refrigerant flow through orthogonally. Compared with this, heat can be exchanged efficiently between water and the refrigerant.

  Although not shown, the bottoms of the first flow paths 6, 61, 62 may have a curved shape with the center substantially bulging outward, thereby depending on the physical properties, temperature, flow rate, etc. of one fluid. And the performance as a heat exchanger can be optimized by changing the cross-sectional shape and cross-sectional area of the 1st flow path 6,61,62.

  The upper plate 21 constituting the first flow paths 6, 61, 62 may also have a curved surface shape similar to the bottom portion (not shown), whereby the first flow path 6 is changed according to the physical properties, temperature, flow velocity, etc. of one fluid. , 61, 62 can be changed in cross-sectional shape and cross-sectional area to optimize the performance as a heat exchanger. Although not shown, the first flow paths 6, 61, 62 may be less likely to be clogged by the scale by appropriately changing the cross-sectional shape of the first flow paths 6, 61, 62.

  A single or a plurality of first flow paths 6, 61, 62 formed in the box 1 are arranged so that the water in the first flow paths 6, 61, 62 and the second flow path 10 are in direct contact with each other. Alternatively, by adopting a configuration in which a plurality of second flow paths 10 are installed, the heat transfer performance between two types of fluids can be improved and the performance as a heat exchanger can be improved. Can be planned.

  Further, the single or plural second flow paths 10 are installed in the single or plural first flow paths 6, 61, 62, and the details will be described later. For example, hot water is heated in two stages. Thus, the hot water can be heated to a temperature that is difficult to achieve with one refrigeration cycle. Alternatively, one water in the first flow paths 6, 61, 62 can be heated from a low temperature to a medium temperature, and the other water can be heated from a low temperature to a high temperature. Alternatively, a plurality of independent heat exchangers can be formed in a single box 1.

Note that the two types of fluids are not limited to water and refrigerant. For example, by configuring the air flow and the refrigerant flow to face each other, the performance of the heat exchanger used in the air conditioner can be improved, so that it can contribute to higher performance or downsizing of the air conditioner. become.
<First embodiment>

  Here, regarding the first embodiment of the heat exchanger according to the present invention, FIG. 1 (A) and FIG. 1 (B), FIG. 2 (A) and FIG. 2 (B), and FIG. This will be described below based on FIG.

  The box 1 includes an upper plate 21 formed in a circular shallow container shape (concave) and a lower plate 22 correspondingly formed in a circular shallow container shape (concave shape). The upper plate screw portion 35 formed on the side inner peripheral surface of the upper plate 21 is screwed to the lower plate screw portion 34 formed on the outer peripheral surface of the side portion 22. By configuring the box 1 to be made of a synthetic resin, for example, heat loss due to heat transfer from the surface can be reduced as compared with the case where the box 1 is made of metal. In addition, the raw material of the box 1 is not limited to a synthetic resin.

  The upper plate 21 constituting the box 1 is provided with a packing 11 on its inner surface for preventing water leakage facing the upper end portion of the lower plate 22, and the upper plate screw portion 35 is connected to the lower plate screw portion 34. By screwing, the box 1 is sealed and the first flow path 6 is formed.

  The lower plate 22 constituting the box 1 includes an inlet 4 and an outlet 5 for one fluid, and a rising portion 71 so as to connect the one inlet 4 and the outlet 5 of the fluid in a meandering manner, A single first flow path 6 meanderingly formed with a communicating portion 72 that connects adjacent rising portions 71 to each other is provided.

  Although not shown, the pipe connected to the first flow path 6 has a packing for preventing water leakage at one of the fluid inlet 4 and outlet 5 shown in FIGS. 1 (A) and 1 (B). It is inserted and fastened with a flare nut.

  The lower plate 22 includes a first inlet 81 and a first outlet 91 for the other fluid, and a second inlet 82 and a second outlet 92 for the other fluid. In order to connect the second outlet 92 and the other channel 101b by the channel pipe installed on the upstream side in the first channel 6, the first inlet 81 and the first outlet 91 are connected. A second flow path 10 is provided which is composed of one flow path 101 a formed by a flow path pipe installed on the downstream side in the first flow path 6.

  At the first inlet 81 and the first outlet 91 of the other fluid, a tube body 104 fixed (brazed) to both end portions 10a of one flow passage 101a has an O-ring 105 for preventing water leakage. It is interposed and fastened by a nut 106.

  Similarly, at the second inlet 82 and the second outlet 92 of the other fluid, a tube body 104 for connecting both end portions 10a of the other channel 101b has an O-ring 105 for preventing water leakage. It is interposed and fastened with a nut 106.

  As shown in FIGS. 7A to 7C, the tube body 104 fixed to both end portions 10a of the second channel 10 (one channel 101a and the other channel 101b) has an auxiliary bending portion. The refrigerant inlet / outlet portion 103 bent downward at 102 is connected to the first inlet 81 and the first outlet 91 of the other fluid and the second inlet 82 and the second outlet 92 of the other fluid. A nut 106 is used for fastening.

  The heat exchanger according to the first embodiment of the present invention is provided on the lower plate 22 as shown in FIG. 1 (A), FIG. 2 (A), and FIG. 7 (A) to FIG. 7 (C). In the provided first flow path 6, one flow path 101a and the other flow path 101b constituting the second flow path 10 are installed, and the tube body 104 fixed to these both end portions 10a is used for the other fluid. The upper plate screw portion 35 of the upper plate 21 provided with the packing 11 is fastened to the lower plate screw portion 34 by being fastened to the second inlet 82 and the second outlet 92 by the nut 106.

  Thereby, as shown in FIG. 2 (A) and FIG. 2 (B), water, which is one fluid flowing in from one fluid inlet 4 circulates in the first flow path 6 while meandering, It circulates as shown by arrow AA in FIG. 2B and reaches one fluid outlet 5.

  On the other hand, the refrigerant that is the other fluid that has flowed into the one channel 101a of the second channel 10 from the first inlet 81 of the other fluid is in direct contact with the water in the first channel 6. One channel 101a of the two channels 10 circulates in opposition to the flow of water in the first channel 6 as shown by the broken arrow B1-B1 in FIG. To the exit 91.

  The refrigerant flowing from the second inlet 82 of the other fluid into the other channel 101b of the second channel 10 is drawn by the other channel 101b in direct contact with the water in the first channel 6. As shown by the solid line arrow B2-B2 in FIG. 2 (B), it circulates in opposition to the flow of water in the first flow path 6 and reaches the second outlet 92 of the other fluid.

  The water in the first flow path 6 and the one flow path 101a and the other flow path 101b of the second flow path 10 are in direct contact with each other, and the water and the refrigerant are counterflows. The water and the refrigerant are efficiently heat-exchanged.

  Therefore, water flowing in from one fluid inlet 4 flows in the first flow path 6 as indicated by the arrow AA shown in FIG. Then, heat is exchanged with the refrigerant that reaches the second outlet 92 of the other fluid from the second inlet 82 of the other fluid, and the temperature rises. Further, the counter flow indicated by the broken arrow B1-B1 As described above, heat is also exchanged with the refrigerant from the first inlet 81 of the other fluid to the first outlet 91 of the other fluid, and the temperature rises, and high-temperature hot water heated in two stages. Can be obtained.

In addition, the one flow path 101a and the other flow path 101b of the second flow path 10 stop, for example, only the refrigerant flow (the refrigerant in the one flow path 101a) indicated by the broken arrow B1-B1. The water in the first flow path 6 is heated only with the refrigerant from the second inlet 82 of the other fluid to the second outlet 92 of the other fluid, and the temperature rises. Compared to the case where heat is exchanged between the refrigerant indicated by arrows B2-B2 and the broken arrows B1-B1, hot water heated to a lower temperature can be obtained.
In this case, the hot water heated to a low temperature is similarly stopped by stopping only the refrigerant flow (the refrigerant in the other channel 101b of the second channel 10) indicated by the solid line arrow B2-B2. You may make it obtain.
<Second Embodiment>

  Next, a second embodiment of the heat exchanger according to the present invention will be described below based on FIG. 3 (A) and FIG. 3 (B).

  The box 1 has a configuration in which one flow path 61 and the other flow path 62 constituting the first flow path 6 are provided therein, and a pipe (not shown) is provided in the one flow path 61 and the other flow path 62. The structure shown in FIG. 7 (B) and FIG. 7 (C) is shown in FIG. 7 (B) and FIG. 7 (C). Since the configuration fastened by 106 and the configurations of the upper plate 21 and the packing 11 are the same as those in the first embodiment, the description will not be repeated.

  The lower plate 22 constituting the box body 1 includes a first inlet 41 and a first outlet 51 of one fluid, a second inlet 42 and a second outlet 52, and these first inlets 41 and the first outlet 51 and the second inlet 42 and the second outlet 52 meander in a meandering manner by the rising portion 71 and the communicating portion 72 that connects the adjacent rising portions 71 to each other. One flow path 61 and the other flow path 62 of the formed one fluid are provided.

  In the heat exchanger according to the second embodiment of the present invention, as shown in FIG. 3A and FIGS. 7A to 7C, a part of the second flow path 10 is a lower plate. 22 is provided in one flow path 61 of the first flow path 6, and a communication part 63 in which the central part of the second flow path 10 communicates one flow path 61 and the other flow path 62 of one fluid. And the other half of the second channel 10 is installed in the other channel 62 of the first channel 6. In addition, after inserting the center part of the 2nd flow path 10 in the communication part 63, the clearance gap between the communication part 63 and the 2nd flow path 10 is sealed by filling up with a filler. Although not shown, a packing inserted through the second flow path 10 may be used instead of the filler.

  As a result, as shown in FIGS. 3A and 3B, water, which is one fluid that has flowed in from the first inlet 41 of one fluid, is contained in one channel 61 of the first channel 6. Circulates while meandering, circulates as shown by arrows A1-A1 in FIG. 3B, and reaches the first outlet 51 of one fluid.

  Further, as shown in FIGS. 3A and 3B, water, which is one fluid that has flowed from the second inlet 42 of one fluid, passes through the other channel 62 of the first channel 6. By flowing while meandering, it flows as shown by arrow A2-A2 in FIG. 3B and reaches the second outlet 52 of one fluid.

  On the other hand, the refrigerant that is the other fluid that has flowed into the second channel 10 from the inlet 8 of the other fluid is directly in contact with the water in the other channel 62 of the one fluid. The second channel 10 that is in direct contact with the water in one channel 61 of the first channel 6 causes the other of the first channel 6 as shown by the solid line arrow BB in FIG. The flow path 62 and the flow of water in one flow path 61 face each other and reach the outlet 9 of the other fluid.

  The water in one flow path 61 and the other flow path 62 of the first flow path 6 and the second flow path 10 are in direct contact with each other. And the refrigerant exchange heat efficiently.

  Therefore, the water flowing in from the second inlet 42 of one fluid flows in the other channel 62 of the first channel 6 as indicated by arrows A2-A2 shown in FIG. Like the counterflow shown to B-B, it heat-exchanges with the refrigerant | coolant which goes to the exit 9 of the other fluid from the inlet 8 of the other fluid, and temperature rises, and the 1st entrance 41 of one fluid The water flowing in from the other fluid inlet 8 to the other fluid outlet 9 while flowing in one channel 61 of the first channel 6 as shown by arrows A1-A1 in FIG. The temperature rises due to heat exchange with the incoming refrigerant.

  At that time, the water flowing as indicated by arrows A2-A2 shown in FIG. 3B flows from the inlet 8 of the other fluid and exchanges heat with the refrigerant toward the outlet 9, whereby a predetermined amount is obtained. Hot water heated to a temperature can be obtained from the second outlet 52 of one fluid.

  At that time, the temperature of the refrigerant flowing as indicated by the solid arrow BB shown in FIG. 3B is reduced by the heat exchange with the flowing water as indicated by the arrow A2-A2. Therefore, the refrigerant whose temperature has been lowered is heat-exchanged with water flowing as indicated by arrows A1-A1 while heading toward the outlet 9 of the other fluid.

Thus, the water flowing as indicated by the arrow A1-A1 can be obtained from the first outlet 51 of one fluid as the hot water that has risen to a temperature lower than the temperature of the flowing water as indicated by the arrow A2-A2. it can.
<Third embodiment>

  Next, a third embodiment of the heat exchanger according to the present invention will be described below based on FIG. 4 (A) and FIG. 4 (B).

  The box 1 has a configuration in which one flow path 61 and the other flow path 62 constituting the first flow path 6 are provided therein, and a pipe (not shown) is provided in the one flow path 61 and the other flow path 62. Both ends of one channel 101a by the configuration in which the body is connected, the other channel 101b by the channel tube installed in one channel 61 and the channel tube installed in the other channel 62 The tube 104 fixed to 10a is fastened to the first inlet 81 and the first outlet 91 of the other fluid by the nut 106 shown in FIGS. 7B and 7C, and the other fluid The configuration in which the nut 106 shown in FIGS. 7B and 7C is fastened to the second inlet 82 and the second outlet 92, the configurations of the upper plate 21 and the packing 11 are the same as those in the first embodiment. Since it is the same as the second embodiment or the second embodiment, Avoid.

  The lower plate 22 constituting the box body 1 includes a first inlet 41 and a first outlet 51 of one fluid, a second inlet 42 and a second outlet 52, and these first inlets 41 and the first outlet 51 and the second inlet 42 and the second outlet 52 meander in a meandering manner by the rising portion 71 and the communicating portion 72 that connects the adjacent rising portions 71 to each other. One flow path 61 and the other flow path 62 of the formed one fluid are provided.

  The heat exchanger according to the third embodiment of the present invention has a second flow channel 101b of the second flow channel 10 as shown in FIG. 4 (A) and FIGS. 7 (A) to 7 (C). Is installed in one channel 61 of the first channel 6 provided on the lower plate 22, and one channel 101 a of the second channel 10 is installed in the other channel 62 of the first channel 6. It is comprised so that.

  As a result, as shown in FIGS. 4A and 4B, the water, which is one fluid flowing in from the first inlet 41 of the one fluid, flows into the one channel 61 of the first channel 6. Circulates while meandering, and circulates as shown by arrows A1-A1 in FIG. 4B to reach the first outlet 51 of one fluid.

  Also, as shown in FIGS. 4A and 4B, water, which is one fluid that has flowed from the second inlet 42 of one fluid, flows through the other channel 62 of the first channel 6. By flowing while meandering, it flows as shown by arrow A2-A2 in FIG. 4B and reaches the second outlet 52 of one fluid.

  On the other hand, the refrigerant that is the other fluid that has flowed into the one channel 101a of the second channel 10 from the first inlet 81 of the other fluid is separated from the water in the other channel 62 of the first channel 6. As shown by the broken line arrow B1-B1 in FIG. 4B, the flow of water in the other flow path 62 of the first flow path 6 is changed by one flow path 101a of the second flow path 10 in direct contact. It circulates oppositely and reaches the first outlet 91 of the other fluid.

  In addition, the refrigerant that is the other fluid that has flowed into the other channel 101 b from the second inlet 82 of the other fluid is in direct contact with the water in the one channel 61 of the first channel 6. As shown by the solid line arrow B2-B2 in FIG. 4B, the other flow channel 101b of FIG. 10 circulates in opposition to the flow of water in one flow channel 61 of one fluid, and the other fluid To the second exit 92.

  The water in one flow path 61 of the first flow path 6 and the other flow path 101b of the second flow path 10 are in direct contact with each other, and the water in the other flow path 62 of the first flow path 6 is also in contact. Since the first flow path 101a of the second flow path 10 is in direct contact with each other and the water and the refrigerant are counterflows, the water and the refrigerant are efficiently heat-exchanged.

  Therefore, the water flowing from the second inlet 42 of one fluid flows through the other channel 62 of the first channel 6 as indicated by the arrow A2-A2 shown in FIG. As in the counter flow shown in B1-B1, the second outlet of one fluid is used as hot water that is heat-exchanged and heated with the refrigerant from the first inlet 81 of the other fluid toward the first outlet 91. 52.

  Further, water flowing from the first inlet 41 of one fluid flows through the one channel 61 of the first channel 6 as indicated by the arrow A1-A1 shown in FIG. As a warm water heated by exchanging heat with the refrigerant from the second inlet 82 to the second outlet 92, it is obtained from the first outlet 51 of one fluid.

  Thereby, the 1st heat exchanger which can obtain warm water from the 2nd exit 52 of one fluid, and the 2nd heat exchange which can obtain warm water from the 1st exit 51 of one fluid It becomes possible to form two heat exchangers in a single box 1.

In this case, the hot water from only the second outlet 52 of one fluid is stopped by stopping the water flowing from the first inlet 41 of one fluid and the flow of the refrigerant indicated by the solid arrow B2-B2. It is also possible to use a heat exchanger that can obtain either of the fluids, or by stopping the water flowing in from the second inlet 42 of one fluid and the refrigerant flow indicated by the broken arrows B1-B1. It is good also as a heat exchanger which can obtain warm water only from the 1st exit 51 of this.
<Fourth embodiment>

  Next, a fourth embodiment of the heat exchanger according to the present invention will be described below based on FIGS. 5 (A) and 5 (B) and FIGS. 6 (A) and 6 (B). To do.

  The box 1 has a configuration in which a first flow path 6 is provided in a spiral shape inside, and a configuration in which a tube (not shown) is connected to the first flow path 6 or a first installed in the first flow path 6. The pipes 104 fixed to both ends 10a of the one flow path 101a and the other flow path 101b by the flow path pipes constituting the two flow paths 10 are the first inlet 81 and the first outlet 91 of the other fluid. 7B and 7C, and the second fluid inlet 82 and second outlet 92 of the other fluid are connected to each other in FIGS. 7B and 7C. The configuration fastened by the nut 106 shown, the configuration of the upper plate 21 and the packing 11 and the like are the same as those in the first to third embodiments, and therefore, repeated description is avoided.

  In the first flow path 6 formed in a spiral shape, one flow path 101 a and the other flow path 101 b of the second flow path 10 formed in a spiral shape are provided inside the first flow path 6. 81 is provided so as to reach the first outlet 91 and from the second inlet 82 of the other fluid to the second outlet 92.

  As shown in FIGS. 5A and 5B, FIG. 6, and FIGS. 7A to 7C, the heat exchanger according to the fourth embodiment of the present invention Since one flow path 6 is formed in a spiral shape, the flow path bends R (curvature radius) is larger than that in the case where they are bent in a meandering manner, and is one fluid that circulates inside the flow path 6. Water distribution resistance can be reduced.

  Further, the heat exchanger according to the fourth embodiment is the first embodiment described based on FIGS. 1 (A) and 1 (B) and FIGS. 2 (A) and 2 (B). In the same manner as in the case of the heat exchanger according to FIG. 1, the configuration is described as having a single first flow path 6 and one flow path 101a and the other flow path 101b constituting the second flow path 10.

  In addition, about the structure by which the 1st flow path 6 and the 2nd flow path 10 are formed in a spiral shape, like 2nd Embodiment, one flow path 61 and the other flow path 62 by plural, and by the singular The second flow path 10 may be configured, and, similarly to the third embodiment, one of the plurality of flow paths 61 and the other of the flow paths 62, and the plurality of one of the flow paths 101a and Although the same effect can be obtained with the configuration including the other flow path 101b, the same illustration and description are not repeated here.

  As described above, according to the configuration of the present invention, by installing the single or plural second flow paths 10 in the single or plural first flow paths 6, the two types of fluid flows are made to face each other. Thus, it is possible to improve the heat transfer performance, obtain hot water having different temperatures, or form a plurality of heat exchangers in a single box 1.

1 box 21 upper plate
22 Lower plate 34 Lower plate screw part 35 Upper plate screw part 4 One fluid (water) inlet 41 First inlet 42 Second inlet 5 One fluid (water) outlet 51 First outlet 52 Second Outlet 6 First flow channel 61 One flow channel 62 Other flow channel 63 Communication portion 71 Rising portion 72 Communication portion 8 The other fluid (refrigerant) inlet 81 The first inlet 82 The second inlet 9 The other fluid (refrigerant) Outlet 91 first outlet 92 second outlet 10 second flow path 101a one flow path 101b other flow path 102 auxiliary bending portion 103 refrigerant inlet / outlet portion 104 pipe 105 O-ring 106 nut 10a both ends 10b bent portion 11 Packing

Claims (6)

A heat exchanger that performs heat exchange between one fluid flowing in a first flow path provided in a box and the other fluid flowing in at least two second flow paths disposed in the first flow path. And
One of the second channels is disposed on the upstream side of the first channel, and the other channel of the second channel is disposed on the downstream side of the first channel. Heat exchanger. A heat exchanger that exchanges heat between one fluid flowing in at least two first flow paths provided in a box and the other fluid flowing in a second flow path disposed in the first flow path. And
The heat exchanger, wherein the second flow path is disposed in communication with at least two of the first flow paths. A heat exchanger that exchanges heat between one fluid flowing in at least two first flow paths provided in a box and the other fluid flowing in a second flow path disposed in the first flow path. And
The heat exchanger, wherein the second flow path is disposed in at least two of the first flow paths.   The heat exchanger according to any one of claims 1 to 3, wherein the first flow path is formed in a meandering manner in the box.   The heat exchanger according to any one of claims 1 to 3, wherein the first flow path is formed in a spiral shape in the box.   The said 1st flow path and said 2nd flow path are comprised so that said one fluid and said other fluid may become a counterflow, The claim 1 thru | or 5 characterized by the above-mentioned. Heat exchanger.

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