JP2006317069A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance long-term reliability of a heat exchanger by suppressing clogging with scale without degrading heat exchanger performance to suppress degradation of heat exchanger performance and blocking of a water passage caused by clogging with scale. <P>SOLUTION: The heat exchanger 1X comprises a triple tube 1 which is a tubular body having a water side passage 2a serving as a first fluid passage and a refrigerant side passage 4a serving as a second fluid passage inside and allowing water used as a first fluid and a refrigerant used as a second fluid to flow in a mutually heat exchangeable manner, and a vibrating motor 8 serving as a vibration generating means. A wall surface 2b exchanging heat in contact with water in an inner tube 2 of the water side passage 2a in the triple tube 1 is vibrated by the vibrating motor 8 to exfoliate scale and to prevent resticking. Degradation of heat exchanging performance and blocking of the water passage caused by clogging with scale are thereby suppressed to enhance long-term reliability. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a heat exchanger that performs heat exchange between water and a refrigerant in a heat pump type hot water heater, an air conditioner for home use, and for business use.

  Conventionally, when this type of heat exchanger is used, hardness components such as calcium and magnesium in water gradually deposit, adhere and accumulate in the water-side flow path as a scale (for example, calcium carbonate). When the scale accumulates on the wall where heat is exchanged, it becomes a thermal resistance, reducing the heat exchange performance, increasing the flow path resistance, decreasing the flow rate of the pressure pump water for flowing water, There is a problem that the road is blocked and the product does not function. Since the precipitation of calcium carbonate increases extremely when water becomes hot, scale tends to deposit on the high temperature side of the heat exchanger. To reduce the heat exchange performance due to the scale, that is, to suppress it, that is, to include a removing means (see, for example, Patent Document 1), and to increase the cross-sectional area of the high-temperature downstream water-side flow path that is easily attached to the scale There exists a thing (for example, refer patent document 2).

  Patent Document 1 describes a heat pump water heater having a clogging means in the water-side flow path. As a scale removing method, it is disclosed that pressurized water is passed through a water circuit of a heat pump water heater, vibration is applied, or a part of the water circuit is detachable. However, the detailed configuration of the heat exchanger in which water and the refrigerant exchange heat has not been described.

  FIG. 10 is a partial cross-sectional view of a conventional heat exchanger described in Patent Document 2. The heat exchanger 100 includes a water pipe 101, a refrigerant pipe 102, a water connection pipe 103, and a refrigerant connection pipe 104, and the water pipe 101 uses a pipe having a diameter larger than that of the upstream side on the downstream side.

  The operation of the heat exchanger 100 configured as described above will be described below.

Usually, the water pipe 101 and the refrigerant pipe 102 exchange heat and warm low-temperature water with heat from the high-temperature refrigerant. Even if scale is deposited in the water pipe 101, the downstream side has a large flow path, so that it flows smoothly. In addition, it took time to adhere and become tangled, extending the life of the heat exchanger.
JP 2004-144445 A JP 2004-093037 A

  However, in the configuration of the heat exchanger 100 described in the above-described conventional Patent Document 2, when the water-side flow path is increased, the flow rate of the water is decreased, so that the heat exchange performance is decreased.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to suppress scale clogging and improve long-term reliability of a heat exchanger without deteriorating heat exchanger performance.

  In order to solve the above-described conventional problems, a heat exchanger according to the present invention is provided in a tubular body or a casing, and includes a water-side channel and a refrigerant-side channel in which water and a refrigerant flow so as to exchange heat with each other. And a vibration generating means, and the vibration generating means vibrates the wall surface that is in contact with the water in the water-side flow path and exchanges heat.

  As a result, the heat exchange wall surface of the water side channel is vibrated, so that the scale is shaken off and reattachment to the wall surface of the water side channel is prevented.

  The heat exchanger of the present invention can suppress deterioration of heat exchanger performance due to clogging or clogging of the water flow path, and can improve the long-term reliability of the heat exchanger.

  The invention according to claim 1 has a first fluid channel and a second fluid which are provided inside a tubular body or a housing and in which the first fluid and the second fluid flow so as to exchange heat with each other. The vibration generating means vibrates a wall surface in contact with the first fluid in the flow path of the first fluid to exchange heat.

  As a result, when the first fluid is water, the attached scale is shaken off, and the scale is also prevented from reattaching to the wall of the water-side flow path. The blockage of the path can be suppressed, and the long-term reliability of the heat exchanger can be improved. In addition, the propagation of vibration to water promotes the turbulent flow of water and improves the heat exchange performance.

  The invention according to claim 2 is the invention according to claim 1, wherein the tubular body or the housing is integrally formed with the flow path of the first fluid and the flow path of the second fluid inside. Alternatively, it is a rigid body formed by bringing a separate body into close contact.

  Accordingly, the vibration can be efficiently transmitted through the rigid body while suppressing the attenuation to the wall surface for heat exchange in the flow path of the first fluid, so that the vibration generating means can be attached to the outer periphery of the tubular body or the casing.

  The invention according to claim 3 has the stretchable member inserted along the wall surface of the flow path of the first fluid in the invention according to claim 1 or 2.

  Thus, by vibrating the wall surface in contact with the first fluid and exchanging heat in the flow path of the first fluid, a part of the elastic member that is not in contact with the wall surface collides with the wall surface, and the reaction force is reduced. Slightly moves in the direction received. The portion that is in contact with the wall surface has a greater degree of freedom than the wall surface, so that it receives a force from the wall surface and moves away from the wall surface, and moves in the vicinity of the wall surface with a width larger than the amplitude of the wall surface. Therefore, as a whole, since the elastic member has deflection and twist, partial fine movement propagates so as to wave the surface, and expands and contracts in the axial direction and the circumferential direction. Therefore, when the first fluid is water by rubbing the elastic member and the wall surface, the scale attached to the wall surface can be peeled off and removed to prevent the clogging. Moreover, since the elastic member slightly moves in the vicinity of the wall surface, turbulence of water in the vicinity of the wall surface can be promoted, and the heat exchange performance can be further improved.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the stretchable member is provided on the high temperature side of the heat-exchanged first fluid.

  With this, when water is used as the first fluid, it is possible to prevent clogging of the flow path of the water fluid with a small number of members by providing a stretchable member on the high temperature side of the heat exchanger main body to which the scale easily adheres. It is possible to increase the long-term reliability of the heat exchanger at a lower cost while suppressing an increase in the flow resistance of water due to water.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the vibration generating means is driven in accordance with an accumulated operation time of heat exchange between the first fluid and the second fluid. It is something to be made.

  Accordingly, when water is used as the first fluid, the scale is removed by periodically vibrating, and it is possible to prevent growth beyond a certain amount and to improve the long-term reliability of the heat exchanger.

  The invention according to claim 6 is the invention according to any one of claims 1 to 4, further comprising a detecting means for the flow path of the first fluid, and based on the detection of the detecting means, The vibration generating means is driven automatically or manually.

  As a result, when water is used as the first fluid, scale growth can be quickly detected and the scale removed, and scale adhesion can be suppressed below a certain amount, thereby improving the long-term reliability of the heat exchanger. .

  The invention according to claim 7 is the invention according to any one of claims 1 to 4, wherein the vibration generating means is arbitrarily driven by a manual switch.

  As a result, when the first fluid is water, the scale can be removed at any time, and when the scale suddenly grows rapidly, it is possible to respond quickly, and the long-term reliability of the heat exchanger Can increase the sex.

  The invention according to claim 8 is the invention according to any one of claims 1 to 7, wherein the first fluid is water and the second fluid is carbon dioxide.

  This makes it possible to obtain high heat exchange efficiency as a product, particularly when used in a heat pump type hot water heater.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same components as those in the conventional example or the embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a main part showing a configuration of a heat exchanger according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG. FIG. 3 is a state diagram showing the scale removing action in the embodiment. FIG. 4 is a cross-sectional view of the main part showing the configuration of another heat exchanger in the same embodiment.

  1 and 2, the main body of the heat exchanger 1 </ b> X is composed of a triple tube 1 that is a tubular body. Inside the triple tube 1, the triple tube 1 contains water that is a first fluid flow path and water that is a first fluid and carbon dioxide that is a second fluid in a heat exchangeable manner. The inner tube 2 of the side flow path 2a, the intermediate tube 3 covering the outer periphery of the inner tube 2 and partially contacting the inner tube 2, and the inner tube 3 covering the outer periphery of the inner tube 3 and partially contacting The outer pipe 4 forms a refrigerant side flow path 4a which is a flow path of the second fluid in which the carbon dioxide of the refrigerant flows. The middle tube 3 has a groove 5 that is partially adhered to the inner tube 2 on the inner wall. The outer tube 4 has a rib 6 that is in close contact with the middle tube 3 on the inner wall. A branch pipe 7 is attached to the pipe end of the triple pipe 1. The pipe end of the outer pipe 4 is provided inside the branch pipe 7 and the inner pipe 2 and the middle pipe 3 are penetrated to separate the water and carbon dioxide outlets. The tube end of the intermediate tube 3 penetrating the branch tube 7 is shorter than the inner tube 2 so that the groove communicates with the atmosphere. The inner tube 2, the middle tube 3, and the outer tube 4 are made of copper having good corrosion resistance and thermal conductivity. The outer wall of the outer tube 4 of the triple tube 1 is provided with a vibration motor 8 as vibration generating means, and the vibration motor 8 is configured to be driven by a timer switch 9. The vibration motor 8 includes a vibration generating unit using a DC brushless motor or the like.

  About the heat exchanger 1X comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  Dioxide having a temperature higher than that of a compressor (not shown) having low-temperature water inside the inner pipe 2 that is the water-side flow path 2a and a refrigerant-side flow path 4a between the middle pipe 3 and the outer pipe 4 in the heat pump refrigerant circuit. When carbon is made to flow oppositely, water and carbon dioxide exchange heat through the tube walls of the inner tube 2 and the middle tube 3 to produce hot water.

  Further, as shown in FIG. 3, by vibrating the outer tube 4 constituting the triple tube 1 with the vibration motor 8, the vibration is propagated to the rib 6, the middle tube 3, and the inner tube 2, and the inner tube 2. The wall surface 2b in contact with the water flowing through the water-side flow path 2a is vibrated. Since the vibration motor 8 vibrates in the entire circumferential direction, the wall surface 2b also vibrates in all directions, and the attached scale 10 can be shaken off and the scale 10 can be prevented from reattaching. Moreover, the turbulent flow of water is promoted by the propagation of the vibration to the vibrating wall surface 2b and the water in contact therewith. Thereby, heat exchange performance can be improved.

  The triple tube 1 which is a tubular body has an inner tube 2, an intermediate tube 3 and an outer tube 4 as rigid bodies, and these rigid bodies are in close contact with each other. Therefore, the vibration motor 8 is attached to the wall surface 2b for heat exchange of the water side flow path 2a. Even if it is not directly attached, the vibration can be well transmitted to the wall surface 2b without being attenuated, so that the wall surface 2b on the water channel 2a side of the inner tube 2 can be vibrated by being attached to the outer wall of the outer tube 4 of the triple tube 1. it can.

  The timer switch 9 integrates the operation time of a product (for example, a heat pump water heater) including heat exchange of water and refrigerant or a heat exchanger, and drives the vibration motor 8 when the operation integration time reaches a certain set value. The triple tube 1 is vibrated. By measuring the growth rate of the scale in advance, and knowing the time to deposit a certain amount, it is possible to grow to a certain amount or more by removing the scale by periodically oscillating at the deposition time. Can be prevented.

  Moreover, by setting it as the triple tube 1, the thermal resistance between water and a carbon dioxide is also low, and sufficient heat-transfer area can be ensured. Further, when water and carbon dioxide have a double wall structure and one of the pipes is corroded, the structure is such that the leakage of the internal fluid can be detected by the groove 5 of the middle pipe 3 communicating with the atmosphere. Furthermore, the rib 6 prevents the carbon dioxide flow path from being deformed or crushed, and in addition, reduces the fluid diameter of the carbon dioxide.

  As described above, in the present embodiment, the vibrating tube 8 vibrates the triple tube 1 to shake off the attached scale 10 and prevent the scale 10 from reattaching. It is possible to suppress deterioration of the vessel performance and blockage of the water flow path, and improve the long-term reliability of the heat exchanger. Moreover, water turbulence can be promoted and heat exchange performance can be improved.

  In the present embodiment, the vibration generating means is the vibration motor 8, but is not limited to this, and an actuator using a piezoelectric element and other parts (for example, a compressor, a blower, etc.) accompanied by vibration in the product are vibrated. The same effect can be achieved with the source.

  Further, in the triple tube 1 of the present embodiment, each of the inner tube 2, the intermediate tube 3, and the outer tube 4 is a rigid body, and each tube is brought into close contact with each other, so that it is well transmitted to the inner tube 2 without attenuating vibration. Therefore, the vibration motor 8 can be easily attached by vibrating the wall surface 2b of the inner pipe 2 on the water channel 2a side by attaching to the outer wall of the outer pipe 4 of the triple pipe 1. The inner tube 2, the middle tube 3, and the outer tube 4 may be formed integrally.

  In addition, although the tubular body which comprises the main body of the heat exchanger 1X was shown as the triple tube 1, it has not only this but a water side flow path and a refrigerant | coolant side flow path inside, and it is rigidly integrated or closely_contact | adhered. For example, the same effect can be obtained in various forms such as a simple structure in which round tubes are simply superposed as water tubes and refrigerant tubes (not shown). Further, the main body of the heat exchanger 1X may be a casing. For example, the water-side flow path is a box-shaped casing, and a tube or a porous body serving as a refrigerant passage is adhered to the outer wall surface or the inner wall surface of the casing. It may be formed integrally (not shown).

  In the present embodiment, the outer tube 4 is vibrated by driving the vibration motor 8 according to the accumulated operation time using the timer switch 9, and the rib 6, the intermediate tube 3, and the inner tube 2 are vibrated. Propagating vibrations to vibrate the wall 2b for heat exchange of the water-side channel 2a and periodically removing the scale to prevent the water-side channel 2a from becoming clogged by preventing it from growing beyond a certain amount. In addition, the long-term reliability of the heat exchanger can be improved.

  Further, high heat pump efficiency can be obtained by using water as the first fluid, carbon dioxide as the second fluid, and using the heat exchanger 1X as a water-refrigerant heat exchanger for heat pump hot water heaters.

  In the embodiment of the present invention, the second fluid is carbon dioxide. However, the present invention is not limited to this, and the same effect can be obtained by using other high-pressure refrigerants such as R410A and R32.

  Moreover, in this Embodiment, the tubular body which comprises the main body of the heat exchanger 1X was made into the triple tube 1, The thermal resistance between water and a carbon dioxide is also low, and sufficient heat-transfer area is ensured. High heat exchange efficiency can be obtained. Furthermore, a double wall structure between water and carbon dioxide ensures safety as a heat exchanger for hot water supply, and a leak detection structure can be obtained at low cost by applying a grooved pipe to the middle pipe 3. it can. Therefore, it is possible to obtain a heat exchanger having a small and inexpensive leak detection structure with high heat exchange efficiency.

  Further, in the present embodiment, the inner tube 2, the middle tube 3, and the outer tube 4 are made of copper, but the same effect can be obtained with brass, SUS, or the like. The inner tube 2 in which water flows is preferably made of a material having good corrosion resistance (for example, copper, stainless steel), and the outer tube 4 in which the coolant flows, the diameter is large, and the wall thickness is thick, is preferably high strength, A material with good thermal conductivity (for example, an alloy such as copper or aluminum) is preferable.

  As shown in FIG. 4, a manual switch 11 may be provided in addition to the timer switch 9 that drives the vibration motor 8. By providing the manual switch 11, the scale can be removed at an arbitrary timing, and when the scale suddenly grows suddenly, it is possible to respond quickly and improve the long-term reliability of the heat exchanger. Can do.

(Embodiment 2)
FIG. 5 is a cross-sectional view of a main part showing the configuration of the heat exchanger according to Embodiment 2 of the present invention. FIG. 6 is a cross-sectional view of the main part of the inner tube into which the stretchable member is inserted in the same embodiment. FIG. 7 is a state diagram showing the scale removing action in the embodiment. FIG. 8 is a cross-sectional view of the main part showing the configuration of another heat exchanger in the same embodiment.

  5 and 6, the heat exchanger 1 </ b> X has a high temperature of water in which the mesh-shaped member 12, which is an elastic member, is heat-exchanged along the wall surface 2 b of the inner pipe 2 that is the water-side flow path 2 a. It is inserted downstream. The mesh-like member 12 is made by knitting a copper wire 12A into a cylindrical shape, and has elasticity in the axial direction and the circumferential direction due to deflection and twisting.

  About the heat exchanger comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  Since the mesh member 12 has stretchability, microscopically, each of the constituting copper wires 12A is in contact with the wall surface 2b of the inner tube 2 or is not in contact therewith. When the triple tube 1 is vibrated by the vibration motor 8 that vibrates in all directions, the vibration is transmitted from the outer tube 4 to the inner tube 2, and the wall surface 2b vibrates.

  As shown in FIG. 7, among the copper wires 12A, the copper wire 12A not in contact with the wall surface 2b collides with the wall surface 2b, and then moves in the direction of the reaction force received at the time of the collision. Since the copper wire 12A in contact with the wall surface 2b has a greater degree of freedom than the wall surface 2b, the copper wire 12A receives a force in the vibration direction from the wall surface 2b and moves away from the wall surface 2b, and is larger than the amplitude of the wall surface 2b in the vicinity of the wall surface 2b. Move with width. For example, the mesh-like member 12 moves from the black circle solid line to the position of the white circle dotted line, and the copper wire 12A peels off the scale 10 attached to the wall surface 2b. Moreover, since the mesh-like member 12 has deflection and twist by the vibration of the wall surface 2b as a whole, the fine movement of each copper wire 12A undulates the cylindrical surface of the mesh-like member 12. It propagates and expands and contracts in the axial and circumferential directions. Therefore, when the wall surface 2b vibrates, the mesh member 12 slightly moves and expands and contracts in the vicinity of the wall surface 2b. The scale 10 accumulated on the wall surface 2b can be peeled off by rubbing against the wall surface 2b in the process of expanding and contracting. Furthermore, the copper wire 12A constituting the mesh-like member 12 finely moves in the vicinity of the wall surface 2b, thereby disturbing the flow of water in the vicinity of the wall surface 2b and promoting the turbulence of water.

  Further, by providing the mesh-like member 12 only on the high temperature side of the heat-exchanged water, the scale on the high temperature side of the heat exchanger body to which the scale easily adheres is removed, thereby blocking the water flow path with a small number of members. Can be prevented.

  As described above, in the present embodiment, the triple-pipe 1 is vibrated by inserting the elastic mesh member 12 along the wall surface 2b of the inner pipe 2 that is the water-side flow path 2a. As a result, the mesh-like member 12 collides with the wall surface 2b to start fine movement, and the fine movement propagates to the entire surface due to the deflection, and expands and contracts in the axial direction and the circumferential direction to rub against the wall surface 2b. By rubbing, the scale adhering to the wall surface 2b can be peeled off and removed to prevent clogging. Moreover, the turbulent flow of water near the wall surface 2b can be promoted, and the heat exchange performance can be further improved.

  Further, by providing the mesh-like member 12 only on the high temperature side of the heat-exchanged water, removing the high-temperature scale that easily adheres can prevent clogging of the water flow path with a small number of members. The long-term reliability of the heat exchanger can be increased at a lower cost while suppressing an increase in the flow resistance.

  In the present embodiment, the mesh-like member 12 made of the copper wire 12A is shown as the stretchable member. However, the present invention is not limited to this, and the same effect can be obtained with the spiral wire 13 as shown in FIG.

(Embodiment 3)
FIG. 9 is a cross-sectional view of the main part showing the configuration of the heat exchanger according to Embodiment 3 of the present invention.

  In FIG. 9, the heat exchanger 1X includes a vibration motor 8 on the outer wall of the outer tube 4 of the triple tube 1, and a flow sensor 14 serving as a detecting means for the water-side channel 2a.

  About the heat exchanger comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the flow rate of the water in the water side channel 2a is measured by the flow rate sensor 14. As the scale accumulates in the water-side flow path 2a, the flow resistance increases, so the flow rate of water in the pressurizing pump for flowing water decreases. If the relationship between the flow rate of water and the flow path resistance is grasped in advance using this, the scale accumulation state can be estimated from the increase in the flow path resistance, that is, it can be detected. When the measured flow rate of water is reduced to a set value, the clogging is detected. That is, based on the detection, the vibration motor 8 is driven to vibrate the triple tube 1 to remove the scale. Thereby, the growth of the scale can be detected quickly, the scale can be removed, and the scale adhesion can be suppressed below a certain amount.

  As described above, in the present embodiment, the flow sensor 14 is provided, and by virtue of the detection, the vibration motor 8 is driven to vibrate the triple tube 1. Thereby, the growth of the scale can be promptly detected to remove the scale, the adhesion of the scale can be suppressed below a certain amount, and the long-term reliability of the heat exchanger can be improved.

  In the present embodiment, the flow sensor 14 is shown as the detecting means. However, the present invention is not limited to this, and the same effect can be obtained by using various detection methods such as a temperature sensor and other physical property measuring sensors. . In the case of a temperature sensor, when the flow resistance of the water-side flow path increases due to the accumulation of scale, the flow rate of the pressure pump for flowing water decreases. Since the amount of water to exchange heat with respect to the heating amount decreases, the water temperature after heat exchange rises. For this reason, it can also detect by measuring the temperature of water.

  Further, in the present embodiment, the vibration motor 8 is shown as configured to be driven by the detection of the flow sensor 14, but is also provided with the timer switch 9 based on the accumulated operation time shown in the first embodiment and the manual switch 11. Various configurations may be considered.

  As described above, the heat exchanger of the present invention vibrates the wall surface that exchanges heat in contact with the first fluid in the flow path of the first fluid, peels off the scale, and prevents reattachment. Accordingly, it is possible to suppress the deterioration of the heat exchange performance due to the clogging and the blockage of the flow path of the first fluid, and to improve the long-term reliability of the heat exchanger. Furthermore, by inserting a stretchable member along the wall surface of the flow path of the first fluid, the scale obtained by vibrating the wall surface for heat exchange of the first fluid, that is, the prevention effect can be increased. It can also be applied to heat exchangers for various products that obtain hot water.

Sectional drawing which shows the principal part which shows the structure of the heat exchanger in Embodiment 1 of this invention. Sectional drawing in the AA line of FIG. State diagram showing scale removal effect in the same embodiment Sectional drawing which shows the principal part which shows the structure of the other heat exchanger in the same embodiment Sectional drawing which shows the principal part which shows the structure of the heat exchanger in Embodiment 2 of this invention. Sectional drawing of the principal part of the inner tube which inserted the elastic member in the embodiment State diagram showing scale removal effect in the same embodiment Sectional drawing which shows the principal part which shows the structure of the other heat exchanger in the same embodiment Sectional drawing which shows the principal part which shows the structure of the heat exchanger in Embodiment 3 of this invention. Partial sectional view of a conventional heat exchanger

Explanation of symbols

1 Triple tube (tubular body)
1X Heat exchanger 2a Water side channel (first fluid channel)
2b Wall surface 4a Refrigerant side channel (second fluid channel)
8 Vibration motor (vibration generating means)
9 Timer switch 11 Manual switch 12 Mesh member (stretchable member)
13 Spiral wire (stretchable member)
14 Flow rate sensor (ie detection means)

Claims (8)

  A first fluid flow path and a second fluid flow path, which are provided inside the tubular body or the housing and in which the first fluid and the second fluid flow so as to exchange heat with each other; And a wall for heat exchange in contact with the first fluid in the flow path of the first fluid is vibrated by the vibration generating means.   2. The tubular body or the housing is a rigid body formed by integrally forming the flow path of the first fluid and the flow path of the second fluid, or by bringing separate bodies into close contact with each other. Heat exchanger.   The heat exchanger according to claim 1, further comprising a stretchable member inserted along a wall surface of the flow path of the first fluid.   The heat exchanger according to any one of claims 1 to 3, wherein the elastic member is provided on a high temperature side of the heat-exchanged first fluid.   The heat exchanger according to any one of claims 1 to 4, wherein the vibration generating unit is driven in accordance with an accumulated operation time of heat exchange between the first fluid and the second fluid.   5. The vibration generating unit according to claim 1, further comprising: a detection unit that clogs the first fluid flow path, wherein the vibration generation unit is driven automatically or manually based on the detection by the detection unit. Heat exchanger.   The heat exchanger according to any one of claims 1 to 4, wherein the vibration generating unit is arbitrarily driven by a manual switch.   The heat exchanger according to any one of claims 1 to 7, wherein the first fluid is water and the second fluid is carbon dioxide.

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