Cylindrical heat exchanger

Abstract

A cylindrical heat exchanger (100), comprising: a housing (101) which is cylindrical with one closed side and one open side, which has an internal mounting space (S), and which is designed with at least one inlet (105) and at least one outlet (107), wherein the inlet (105) or outlet (107) is provided on the closed side and / or on the side surface of the housing (101), and a heat dissipation unit (110) installed in the mounting space (S) of the housing (101), which is equipped with connecting lines (113) formed alternately by stacking a plurality of plates (111), wherein one of the connecting lines (113) is connected to the mounting space (S), wherein the heat dissipation unit (110) receives operating fluids from the inlet (105) and the operating fluids carry out heat exchange with each other, characterized in that the housing (101) is formed in one piece with an installation section (103) which is provided on one side of a side surface of the housing (101) and is connected to the mounting space (S), The cylindrical heat exchanger (100) further comprises a partition plate (120) that divides the assembly space (S) and the interior of the installation section (103), which is connected to the inlet (105) formed on the installation section (103) and the outlet (107) formed on the side surface of the housing (101) and which forms a bypass channel (121) separately from the connecting lines (113) of the heat dissipation unit (110), The cylindrical heat exchanger (100) further comprises a valve unit (130) installed at the inlet (105) formed on the installation section (103), which passes through the partition plate (120) in the installation section (103), selectively opening and closing the assembly space (S) or the bypass channel (121) divided by the partition plate (120) using a linear displacement generated when expansion or contraction occurs according to the temperature of the operating fluid introduced by the inlet (105), and regulating the flow of the operating fluid. the valve unit (130) has: an outer housing (132) which is inserted from an outside of the installation section (103) towards the second inlet (105), wherein the outer housing (132) a fixing element (134) in which a mounting groove (133) is integrally formed on an inner surface thereof and which is mounted on an outside of the installation section (103) on the opposite side of the second inlet (105), an insertion section (136) which is integrally formed on the fixing element (134), at least one first opening (138) which is formed along a longitudinal direction corresponding to the assembly space (S) divided by means of the partition plate (120), and has at least one bypass hole (142) which is formed corresponding to the bypass channel (121), a fixing rod (146) which is inserted into the outer housing and which is fixed at one end to the mounting groove (133) of the fixing element (134), a deformation element (148) which is mounted on the fixing rod (146) and is moved on the fixing rod (146) by the expansion or contraction according to a temperature change of the operating fluid, an inner housing (152) in which at least a second opening (154) is formed along a longitudinal direction corresponding to the first opening (138) of the outer housing (132) and which is slidably inserted in the outer housing (132), a flange element (156) which is fixed in the inner housing (152) on a lower section of the inner housing (152) and which is fixed on a lower section of the deformation element (148), a stopper (166) which is fixed on the opposite side of the fixing element (134) of the outer housing on the insertion section (136), and an elastic element (174) that is inserted between the deformation element (148) and the stopper (166), is compressed when the deformation element (148) expands and generates an elastic force on the deformation element (148).

Description

Background of the invention; Field of the invention

[0001] The present invention relates to a (for example, substantially) cylindrical heat exchanger. In particular, the present invention relates to a cylindrical heat exchanger for a vehicle (for example, a motor vehicle) that can control the temperatures of operating fluids by heat exchange, improve heat exchange efficiency, and have reduced weight and size. Description of the related technology

[0002] In general, a heat exchanger transfers heat from a high-temperature fluid to a low-temperature fluid through a heat exchange surface and is used in a heater, a cooler, an evaporator, and a condenser.

[0003] Such a heat exchanger reuses thermal energy or controls the temperature of an operating fluid introduced into it for increased performance. The heat exchanger is used in a vehicle's air conditioning system or transmission oil cooler and is installed in the engine compartment.

[0004] Since it is difficult to install the heat exchanger in the engine compartment with limited space, research has been conducted on heat exchangers with a smaller size, lighter weight and higher efficiency.

[0005] A conventional heat exchanger controls the temperatures of the operating fluids according to the vehicle's operating conditions and supplies these fluids to an internal combustion engine, transmission, or air conditioning system. For this purpose, branch lines and valves are installed on each hydraulic line, through which the operating fluids flow as either heating or cooling media. This increases the number of components and assembly processes, resulting in a complex design.

[0006] If additional branch lines and valves are not used, the heat exchange efficiency cannot be controlled according to the flow rate of the operating fluid. Therefore, the temperature of the operating fluid cannot be effectively controlled.

[0007] Furthermore, compared to a conventional heat exchanger, the size of the heat exchanger must be increased to improve heat exchange efficiency. Additionally, extra valves for controlling the flow of operating fluids must be mounted externally, thus complicating the components and increasing weight and cost. If the heat exchanger is mounted in the engine compartment, the design becomes correspondingly more complex, and the available mounting space for the components is insufficient.

[0008] A cylindrical heat exchanger according to the preamble of claim 1 is known from US 7,905,203 B2. A substantially rectangular heat exchanger is known from DE 10,2012 113,111 A1, in which a valve controls whether a bypass channel running above a heat dissipation unit is used, the heat dissipation unit having a plate structure and the valve having an outer casing with openings and an inner casing with openings that is rotatable to a limited extent therein. Further heat exchangers are known from EP 0 208 957 A1, DE 602 09 019 T2, EP 1 611 320 B1, and US 2,288 599 A. Valves with linear displacement are known from JP H09-32 782 A and DE 11 2009 003 644 T5.

[0009] The information disclosed in this background section is provided solely for the purpose of better understanding the general background of the invention and should not be regarded as an admission or any indication that this information is part of the prior art as already known to the person skilled in the art. Explanation of the invention

[0010] The object of the present invention is to provide a cylindrical (e.g. container-shaped or can-shaped) heat exchanger for a vehicle which has the advantages that, during heat exchange of the operating fluids with each other in the heat exchanger, the operating fluids are heated and cooled simultaneously according to the temperature of an operating fluid or the flow rate of the operating fluid in a driving condition or in an initial start-up condition of the vehicle.

[0011] The object of the present invention is to provide a (e.g., approximately) cylindrical heat exchanger which is designed in a cylindrical (e.g., container-shaped or can-shaped) form and which can control the temperature of the operating fluids by actuating a valve unit, which can improve the heat exchange efficiency, reduce the weight and size, simplify an engine design, and easily secure an installation space, thereby improving the installation characteristics.

[0012] According to the present invention, a (for example, substantially) cylindrical heat exchanger (e.g., for a vehicle) comprises: a housing that is cylindrical with one closed side and one open side, which has an internal mounting space, which is integrally formed with an installation section provided on one side of a side surface of the housing and connected to (e.g., in contact with) the mounting space, and which is configured with at least one inlet and at least one outlet, wherein the inlet or outlet is provided on the closed side and / or on the side surface of the housing; a heat dissipation unit that is installed in the mounting space of the housing, which is equipped with connecting lines that are arranged by layering (e.g., stacking) a plurality of plates alternately (e.g.,in an alternating manner), wherein one of the connecting lines is connected to the installation space (e.g., in (fluid) contact), wherein the heat dissipation unit receives operating fluids from the inlet and the operating fluids perform heat exchange with each other, a partition plate (e.g., dividing plate) that divides (e.g., spatially separates or demarcates) the installation space and the interior of the installation section, which is connected to the inlet formed on the installation section and the outlet formed on the side surface of the housing (e.g., in (fluid) contact) and which forms a bypass channel (or bypass passage) separately from the connecting lines of the heat dissipation unit, as well as a valve unit that is installed at the inlet formed on the installation section and that passes through the partition plate in the installation section (e.g.,passing through), selectively opening (e.g. connecting to the inlet fluid) and closing (e.g. sealing) the assembly space or bypass channel, which is divided by means of the partition plate, using a linear displacement generated when an expansion or contraction occurs according to a temperature of the operating fluid introduced by the inlet, and stopping the flow of the operating fluid.

[0013] The inlet can have a first inlet formed on the housing and a second inlet formed on the installation section, and the outlet can have a first outlet formed on the housing and spaced apart from the first inlet and a second outlet formed on the side surface of the housing and spaced apart from the second inlet.

[0014] The first inlet can be formed at a position (e.g., substantially) opposite to the second inlet (e.g., in relation to the housing), and the first outlet can be formed at a position (e.g., substantially) opposite to the second outlet (e.g., in relation to the housing).

[0015] Each plate of the plurality of plates can be designed in a disc-shaped form corresponding to the housing (e.g. sectionally or partially), and one side of the plate that corresponds to the partition plate (e.g. facing the partition plate) can be designed in a linear form.

[0016] In each plate of the plurality of plates, a first connecting hole and a second connecting hole can be formed corresponding to the first inlet and the first outlet (e.g. partially or completely covering or overlapping with the first inlet and second outlet).

[0017] In each plate of the plurality of plates, a plurality of projections with predetermined intervals can protrude, and a distribution projection can be formed from a center of each plate of the plurality of plates towards an outer circumferential surface facing the separating plate.

[0018] Each projection of the plurality of projections can be formed in a semicircular shape and protrude in the same direction as the distribution projection.

[0019] The valve unit comprises: an outer housing which is inserted from an outside of the installation section in the direction of the second inlet, wherein the outer housing has a fixing element in which a mounting groove is integrally formed on an inner surface and which is mounted on an outside of the installation section on a side opposite the second inlet, an insertion section which is integrally formed on the fixing element, at least one first opening which is formed along a longitudinal direction corresponding to the installation space divided by the partition plate (e.g., is formed partially or completely overlapping with the installation space divided by the partition plate), and at least one bypass hole which is formed corresponding to the bypass channel (e.g., is formed partially or completely overlapping with the bypass channel).

[0020] The valve unit further comprises: a fixing rod which is inserted into the outer housing and which is fixed at one end to the mounting groove of the fixing element; a deformation element (e.g. an expansion element) which is placed on the fixing rod and is moved on the fixing rod (e.g. forwards or backwards) by the expansion or contraction according to a temperature change of the operating fluid; an inner housing in which at least a second opening is located along a longitudinal direction corresponding to (e.g. overlapping orThe deformation element consists of a flange element that is fixed to a lower section of the inner housing and is slidably inserted in the outer housing, a stopper that is fixed to the insertion section on the opposite side of the fixing element of the outer housing, and an elastic element that is inserted between the deformation element and the stopper, which is compressed when the deformation element expands and generates an elastic force on the deformation element.

[0021] The fixing element of the outer housing can be fixed to the installation section by a retaining ring of an end cap (e.g. end cap) which is mounted on an outer surface of the installation section.

[0022] The outer casing can be a cylinder with an open top.

[0023] The bypass hole and the first opening can be spaced apart along a longitudinal direction of the outer casing and / or can be spaced apart along a circumferential direction at a predetermined angle to each other.

[0024] The first openings can be formed along a longitudinal direction of the outer casing at a distance from the bypass hole on a lower section of the outer casing.

[0025] The inner casing can be a cylinder with both ends open.

[0026] The second openings can be designed so that they are arranged offset from each other at a predetermined angle along the circumferential direction of the inner housing.

[0027] The inner housing can be moved within the outer housing by expanding the deformation element towards the second inlet, so that the (e.g., respective) second opening is positioned at the (e.g., corresponding) first opening in order to open the first opening and close the bypass hole by means of the inner housing.

[0028] The inner housing can be installed during initial assembly (e.g., initial mounting) by closing the first opening with the inner housing and closing the second opening with the outer housing.

[0029] The deformation element can be a wax material that expands or contracts according to the temperature of the operating fluid.

[0030] Flow holes can be formed along the outer circumference of the flange element (e.g. distributed around the circumference of the flange element) at positions spaced apart from each other at a predetermined angle.

[0031] An outer circumferential surface of the flange element can be fixed to an inner circumferential surface of the inner housing, and an installation part (e.g. a mounting part) formed at a center of it can be fixed to the deformation element by a fixing ring.

[0032] At least one through-hole can be formed in the stopper to allow the operating fluid to flow into the valve unit.

[0033] The through holes can be formed in a center and along a circumferential direction of the stopper (e.g. distributed around the circumference of the stopper).

[0034] A fixing protrusion (or fixing element) can be designed so that it protrudes from the stopper, in order to fix the elastic element under the stopper.

[0035] A receiving section (e.g. a stop edge) on which the stopper sits can be formed on the outer housing.

[0036] A ring groove can be formed on an upper inner circumferential surface of the outer housing so that a stopper ring can be received in it to fix the stopper.

[0037] One end of the elastic element can be supported by the stopper, another end of it can be supported by the deformation element, and the elastic element can be a coil spring.

[0038] One of the operating fluids can be a coolant introduced by a radiator, and the other of the operating fluids can be a transmission oil introduced by an automatic transmission.

[0039] The transmission oil can flow through the first inlet, the first outlet and the heat dissipation unit, the coolant can flow through the second inlet and the second outlet, and the connecting lines can have a first connecting line in which the transmission oil flows and a second connecting line in which the coolant flows.

[0040] One end of the partition plate positioned in the assembly space can be bent (e.g. angled) at a predetermined angle relative to another end of the partition plate positioned in the installation section.

[0041] The partition plate may have a through-opening at one end of the partition plate, which corresponds to the heat dissipation unit (e.g., facing the heat dissipation unit).

[0042] A cover that closes off the mounting space can be arranged on the housing.

[0043] According to the present invention, when the temperature of the operating fluids is controlled by heat exchange in the heat exchanger, the cylindrical heat exchanger cools or heats the operating fluids according to the temperature or the flow rate of the operating fluid that is introduced in a driving condition or in an initial start-up condition of the vehicle.

[0044] Furthermore, the temperatures of the operating fluids can be controlled by actuating the valve unit according to the vehicle's operating conditions. Since the heat exchanger is cylindrical, which improves heat exchange efficiency and reduces weight and size, it simplifies engine design and facilitates securing installation space, thus improving assembly characteristics.

[0045] The valve unit, on which the deformation element, such as the wax material, is applied, which expands or contracts according to the introduced operating fluid, can selectively supply the operating fluid, thereby allowing the flow of the operating fluid to be precisely controlled.

[0046] Since the valve unit is installed on the cylindrical heat exchanger, additional control valves and branch lines for controlling the flow of the operating fluids can be omitted. This reduces manufacturing costs and improves processing characteristics (e.g., assembly properties).

[0047] If the operating fluid is the transmission fluid of the automatic transmission, friction (e.g., hydraulic friction) during cold starts can be reduced due to rapid warm-up. Furthermore, slippage during driving can be prevented and durability maintained thanks to excellent cooling performance. Thus, fuel efficiency and transmission longevity can be improved.

[0048] Furthermore, since the valve response for opening and closing is improved according to the temperature of the operating fluid, the commercial value is increased.

[0049] The device of the present invention has other features and advantages which are evident from the accompanying drawings included herein and the following detailed description, which together serve to explain certain principles of the present invention, or which are set out in more detail therein. Explanation of the drawings Fig. Figure 1 is a schematic diagram of an exemplary cooling system of an automatic transmission to which a cylindrical heat exchanger for a vehicle according to the present invention is applied. Fig. Figure 2 is a perspective projection view of the exemplary cylindrical heat exchanger according to the present invention. Fig. Figure 3 is a perspective exploded view of an exemplary cylindrical heat exchanger according to the present invention. Fig. 4 is a cross-sectional view, taken along line AA in Fig. 2 is taken. Fig. Figure 5 is a perspective view of a plate of a heat dissipation unit (e.g. a heat removal unit) applied to the exemplary cylindrical heat exchanger according to the present invention. Fig. Figure 6 is a perspective view of a valve unit applied to the exemplary cylindrical heat exchanger according to the present invention. Fig. Figure 7 is a perspective exploded view of the valve unit applied to the exemplary cylindrical heat exchanger according to the present invention. Fig. Figure 8 is a cross-sectional view along line BB in Fig. 6 has been taken. Fig. Figure 9 is a drawing to illustrate the actuation of the valve unit applied to the exemplary cylindrical heat exchanger according to the present invention. Fig. 10A and Fig. Figure 10B shows drawings illustrating the operation of the exemplary cylindrical heat exchanger for a vehicle according to the present invention. Fig. 11A and Fig. Figure 11B shows drawings illustrating the operation of the exemplary cylindrical heat exchanger for a vehicle according to the present invention.

[0050] It should be understood that the accompanying drawings are not necessarily to scale and present a somewhat simplified representation of various features that illustrate the basic principles of the invention. The specific design features of the present invention, as disclosed herein, including, for example, specific dimensions, orientations, positions, and shapes, will be determined in part by the particular intended application and operating environment. Detailed description

[0051] Reference will now be made in detail to the various embodiments of the present invention, examples of which are illustrated in the accompanying drawings and described below. While the invention is described in connection with these exemplary embodiments, it is understood that the present description is not intended to limit the invention to these exemplary embodiments. On the contrary, it is intended that the invention covers not only the exemplary embodiments but also various alternatives, modifications, variations, and other embodiments that fall within the scope of protection of the invention, as defined in the attached claims.

[0052] In the entire description and the claims, unless explicitly stated otherwise, the word "show" and variations such as "shows" or "showing" are understood to imply the inclusion of the mentioned elements but not the exclusion of any other elements.

[0053] Furthermore, “unit”, “means”, “part”, “element” or the like, as explained in the description, means a unit of an overarching configuration that performs at least one function or activity.

[0054] Referring to the drawings, a cylindrical heat exchanger 100 according to numerous embodiments of the present invention is applied to a cooling system of an automatic transmission.

[0055] As in Fig. As shown in Figure 1, the cooling system of the automatic transmission is equipped with a cooling line for cooling an internal combustion engine. A coolant (e.g., coolant water) flows through a radiator (or cooler) 20, which has a cooling fan 41, via a coolant pump (e.g., a water pump) 10, and is cooled by the radiator 20. A heater core (e.g., a radiator) 30, which is connected to the vehicle's heating system, is mounted on the cooling line.

[0056] The cylindrical heat exchanger 100 according to numerous embodiments of the present invention heats or cools operating fluids according to the temperatures or flow rates of the operating fluids introduced in a driving condition or an initial start-up condition of the vehicle, when the temperatures of the operating fluids in the heat exchanger 100 are controlled by heat exchange.

[0057] Furthermore, it is possible to control the temperatures of the operating fluids by actuating a valve unit 130 according to the vehicle's operating conditions. Since the heat exchanger 100 is designed in a (for example, approximately) cylindrical shape, which can improve heat exchange efficiency and reduce weight and size, it is possible to simplify the engine design. It is also easier to ensure sufficient mounting space, thereby improving installation characteristics.

[0058] The cylindrical heat exchanger 100 according to numerous embodiments of the present invention is arranged between the coolant pump 10 and the heater core 30 and is connected to an automatic transmission 40 by an oil line (hereinafter referred to as "OL").

[0059] In numerous embodiments of the present invention, the operating fluids comprise a coolant introduced by the radiator 20 and a transmission oil introduced by the automatic transmission 40. The cylindrical heat exchanger 100 causes the transmission oil to exchange heat with the coolant, thus controlling the temperatures of the transmission oil and the engine oil.

[0060] As in the Fig. 2, Fig. 3 and Fig. As shown in Figure 4, the cylindrical heat exchanger 100 can have a housing 101, a heat dissipation unit (e.g. a heat removal unit) 110, a partition plate 120 and the valve unit 130.

[0061] The housing 101 is designed to be cylindrical, with one side closed and the other side open, so that a mounting space (S) is formed in the housing 101.

[0062] An installation section (e.g., a mounting section) 103, which is connected to (or in contact with) the mounting space (S), is integrally formed (e.g., in one piece or as a single unit) on one side of a side surface of the housing 101, and at least one inlet 105 and at least one outlet 107 are formed on the closed one side or of the side surface.

[0063] The inlet 105 can have a first inlet 105a, which is formed on the closed side of the housing 100, and a second inlet 105b, which is formed on the side surface of the housing 100.

[0064] The outlet 107 can have a first outlet 107a, which is formed on the closed side of the housing 100, and a second outlet 107b, which is formed on the side surface of the housing 100. The (e.g., first) outlet 107a is arranged such that it is spaced apart from the first inlet 105a, and the second outlet 107b is arranged such that it is spaced apart from the second inlet 105b.

[0065] The first inlet 105a can be arranged in a position opposite the second inlet 105b, and the first outlet 107a can be arranged in a position opposite the second outlet 107b.

[0066] This means that the transmission oil can flow through the first inlet 105a, the first outlet 107a and the heat dissipation unit 110, and the coolant can flow through the second inlet 105b and the second outlet 107b.

[0067] In numerous embodiments of the present invention, the heat dissipation unit 110 is installed in the mounting space (S) of the housing 101 and connecting lines are formed alternately by layering (e.g. stacking) a plurality of plates 111.

[0068] A connecting line 113 (e.g. from the connecting lines) is connected to the assembly space (S) (e.g. fluid connected), and a heat exchange takes place between the transmission oil supplied from the first inlet 105a and the coolant supplied from the second inlet 105b.

[0069] This means that when the transmission oil is introduced through the first inlet 105a and circulates in the heat dissipation unit (e.g. cooling unit) 110, the transmission oil and the coolant introduced into the assembly space (S) of the housing 101 flow in opposite directions due to the counterflow of the transmission oil and the coolant.

[0070] The connecting line 113 can have a first connecting line 113a, in which the transmission oil flows, and a second connecting line 113b, through which the coolant flows into the assembly space (S).

[0071] The plate 111 can be designed in a (e.g., approximately) disc-shaped form corresponding to the housing 101, and one side of the plate 111, which corresponds to the separating plate 120, can be designed in a linear form.

[0072] A first and a second connecting hole 114 and 115 are formed in the plate 111 corresponding to the first inlet 105a and the first outlet 107a respectively.

[0073] The gear oil introduced by the first inlet 105a flows through the first connecting hole 114 into the heat dissipation unit 110, flows through the connecting line 113 and is released through the second connecting hole 115 into the first outlet 107a.

[0074] As in Fig. As shown in Figure 5, a plurality of projections 116 protrude from the plate 111 at a predetermined distance from each other, and a distribution projection 117 is formed from the center of the plate 111 to an outer circumferential surface (towards), which (outer circumferential surface) faces the separating plate 120.

[0075] Each of the projections 116 can be formed in a hemispherical shape, can protrude in the same direction as the distribution projection, and the projections 116 can be formed in a plurality from the center of the plate 111 to the outer circumferential surface in a circumferential direction.

[0076] When the plates 111 are layered (e.g. stacked), the protruding parts of the projections 116 and the distribution projections 117 are connected (accordingly) to each other.

[0077] Since two (connected) plates 111, in which each projection 116 is assembled in contact with each other and each distribution projection 117 is assembled in contact with each other, are layered several times, the first connecting line 113a and the second connecting line 113b are formed alternately.

[0078] The protrusion creates a flow resistance for the transmission oil flowing through the first connecting line 113a of the heat dissipation unit 110 and for the coolant flowing through the second connecting line 113b, thus improving the heat exchange efficiency.

[0079] Furthermore, the distribution projection 117 distributes the flow of each operating fluid evenly in order to increase a flow distance (e.g. flow path) between the gear oil and the coolant, which flow through the first and through the second connecting lines 113a and 113b, so that each operating fluid flows evenly into the entire area of ​​the plate 111 of the heat dissipation unit 110.

[0080] In numerous embodiments of the present invention, the partition plate 120 separates the interior of the assembly space (S) and the interior of the installation section 103 (e.g. spatially), is connected to the second inlet 105b on the installation section 103 and the second outlet 107b on the side surface of the housing 101 and is equipped with a bypass channel (or bypass passage) 121, which is separate from the connecting line 113 of the heat dissipation unit 110.

[0081] In order to separate (e.g. demarcate) part of the assembly space (S), one end of the partition plate 120 positioned in the assembly space (S) can be bent (e.g. angled) at a predetermined angle relative to another end of the partition plate 120 positioned in the installation section 103.

[0082] In the partition plate 120, a through-opening 123 can be formed at one end of the partition plate, which corresponds to the heat dissipation unit 120.

[0083] The through-opening 123 connects the second connecting line 113b to the second outlet 107b via the bypass channel 121, so that the coolant is discharged to the outside of the heat exchanger 100 after the coolant flowing into the assembly space (S) separated by the partition plate 120 has flowed through the second connecting line 113b of the heat dissipation unit 110.

[0084] This means that the coolant flowing through the second connecting line 113b is discharged through the through-opening 123 of the partition plate 120 into the bypass channel 121 and is discharged through the second outlet 107b to the outside of the housing 101.

[0085] In numerous embodiments, the transmission oil flows in through the first inlet 105a and is discharged through the first outlet 107a. The coolant introduced through the second inlet 105b selectively actuates the valve unit 130 and flows through the second connecting line 113b in the assembly space (S). However, the flow of the coolant and the transmission oil can be modified.

[0086] The valve unit 130 is installed inside the installation section 103 corresponding to the second inlet 105b, with one end of the valve unit 130 passing through the partition plate 120.

[0087] The valve unit 130 selectively opens and closes either the assembly chamber (S) or the bypass channel 121, which are separated (e.g., spatially) by the partition plate 120, by means of a linear displacement generated when an expansion (e.g., an extension) or a contraction (e.g., of a deformation element) occurs according to the temperature of the coolant introduced from the second inlet 105b. Thus, the coolant flow can be adjusted.

[0088] As in the Fig. 6, Fig. 7 and Fig. As shown in Figure 8, the valve unit 130 has an outer housing 132, a fixing rod (e.g. fastening rod) 146, a deformation element (e.g. expansion element) 148, an inner housing 152, a flange element 156, a stopper 166 and an elastic element 174.

[0089] The outer housing 132 is inserted from the outside of the installation section 103 towards the second inlet 150b.

[0090] The outer housing 132 has a fixing element (or fixing part) 134, on which a mounting groove 133 is integrally formed on an inner surface and which is mounted on an outer surface of the installation section 103 on a side opposite the second inlet 105b, as well as an insertion section 136, which is integrally formed from the fixing element 134 to the second inlet 105b.

[0091] The insertion section 136 is formed in a cylindrical shape, at least one first opening 138 is formed along a longitudinal direction corresponding to the assembly space (S) separated by the partition plate 120 (in other words: lying in the interior of the installation section 103 connected with the assembly space (S)) and at least one bypass hole 142 is formed corresponding to the bypass channel 121 (in other words: lying in the interior of the installation section 103 connected with the bypass channel 121).

[0092] The bypass holes 142 and the first openings 138 are arranged along a circumferential direction of the outer housing 132 at a predetermined angle to each other (e.g., at positions spaced apart along a longitudinal direction of the outer housing 132). In numerous embodiments, four bypass holes 142 and four first openings 138 are formed along the outer circumferential surface of the insertion section 136 (e.g., substantially) at a distance of 90° from the respective adjacent bypass holes 142 and from the respective adjacent first openings 138, respectively, but these are not limited to this arrangement.

[0093] The first openings 138 are formed along the longitudinal direction of the outer casing 132 at a distance from and below the bypass holes 142.

[0094] The fixing element 134 of the outer housing 132 is fixed to the installation section 103 by a retaining ring (or circlip) 144 of an end cap 178, which is mounted on an outer surface of the installation section 103.

[0095] The outer casing 132 can be a cylinder, the end of which of the insertion section 136 facing the second inlet 105b is open.

[0096] In numerous embodiments, the fixing rod 146 is inserted into the outer housing 132, and a lower end of it is fixedly installed in the mounting groove 133 of the fixing element 134.

[0097] The fixing rod 146 is installed perpendicular to the fixing element 134 from the mounting groove 133 of the fixing element 134 towards the second inlet 105b.

[0098] The deformation element 148 is pushed onto an upper section of the fixing rod 146, and the position of the deformation element 148 on the fixing rod 146 is changed forwards and backwards according to an expansion or contraction of the deformation material which is filled in the deformation element 148 and is influenced by the temperature of the operating fluid.

[0099] The deformation material can be a wax material that expands and contracts according to the temperature of the operating fluid.

[0100] The wax material can be a thermally expanding material that is affected by temperature.

[0101] The deformation element 148 is a component filled with wax material. When the volume of the wax material changes according to the temperature, the deformation element 148 is moved up or down on the fixing rod 146 without changing its external shape.

[0102] When the coolant flows through the second inlet 105b at a relatively high temperature, the deformation element 148 moves forward on the fixing rod 146 due to the expansion of the wax material filled therein, in accordance with an increase in temperature.

[0103] On the other hand, if the coolant flows through the second inlet 105b at a relatively low temperature, the deformation element 148 moves backwards on the fixing rod 146 due to the contraction of the wax material filled therein, in accordance with a decrease in temperature.

[0104] When the deformation element 148 is positioned in an initial state, if the coolant flows through the second inlet 105b at a relatively low temperature, the deformation element will not move upwards or downwards because the volume of the wax material is not changed.

[0105] In numerous embodiments, at least a second opening 154 is formed on the inner housing 152 along its longitudinal direction (e.g. partially or sectionally) corresponding to the first openings 138 of the outer housing 132, and the inner housing 152 is displaceable in the outer housing 132.

[0106] The inner housing 152 has a cylindrical shape with both ends open.

[0107] The second openings 154 are designed such that they are offset (e.g. arranged) along the circumferential direction of the inner housing 152 at a predetermined angle (towards each other), wherein the second openings 154 are arranged at a distance from each other in the circumferential direction at a predetermined angle to each other, corresponding to the first openings 138.

[0108] In the drawings, four second openings 154 (each) are formed in an upper and a lower section of the outer circumferential surface of the inner housing 152 (essentially) at a 90° distance to respective adjacent second openings 154, but these are not limited to this.

[0109] In numerous embodiments, the flange element 156 is connected inside the inner housing 152 to one end (e.g. of the inner housing), and a middle of it is fixed to the lower section of the deformation element 148.

[0110] The flange element 156 can be integrally formed (e.g. manufactured) with the inner housing 152 and fixes the inner housing 152, which is slidable in the outer housing 132, to the lower section of the deformation element 148.

[0111] Flow holes (e.g., flow holes) 158 can be formed along the outer circumference of the flange element 156 (e.g., distributed around the circumference of the flange element 156) at a predetermined angle (e.g., spaced apart from each other).

[0112] For example, four flow holes 158 can be formed along the outer circumference of the flange element 156 (essentially) at 90° intervals, and the operating fluid introduced through the second inlet 105b can flow via the second openings 154 in the inner housing 152 to the second connecting line 113b of the heat dissipation unit 110.

[0113] The outer circumferential surface of the flange element 156 is fixed to the inner circumferential surface of the inner housing 152 (e.g. slidably), and a built-in part 162 formed in the middle of the flange element 156 is attached to the deformation element 148 by a fixing ring 164.

[0114] In numerous embodiments, the inner housing 152 moves forward within the outer housing 132 by means of the flange element 156 (e.g. upwards). Fig. 8) together with the deformation element 148, when the deformation element 148 expands.

[0115] In this case, the second openings 154 of the inner housing 152 are positioned (essentially) corresponding to the (e.g. overlapping with the) first openings 138 in order to open the first openings 138, and the upper section of the inner housing 152 closes the bypass holes 142.

[0116] The inner housing 152 can be installed during initial assembly by closing the second openings 154 with a closed section between the first openings 138, thus closing the first openings 138, and by positioning the upper section of the inner housing 152 under the bypass hole 142 to open the bypass hole 142.

[0117] In numerous embodiments, the stopper 166 is fixed on the opposite side of the fixing element 134 of the outer housing 132 to the insertion section 136.

[0118] At least one through-hole 168 can be formed on the top of the stopper 166 so that the operating fluid introduced through the second inlet 105b flows into the valve unit 130 to allow deformation of the deformation element 148.

[0119] In the drawings, a through hole 168 is formed in the middle of the stopper 166 and 3 through holes 168 are formed along the circumferential direction (essentially) at intervals of 120° (e.g. distributed around the circumference), but these are not limited to this.

[0120] The stopper 166 is mounted on the insertion section 136 of the outer housing 132, and the coolant introduced through the second inlet 105b flows into the interior of the outer housing 132.

[0121] A receiving section (e.g. a stop edge) 135, on which the stopper 166 is received (e.g. on which the stopper sits), is formed on the upper section of the outer housing 132.

[0122] The receiving section 135 is formed along the inner circumferential surface of the outer housing 132 and protrudes towards the center of the outer housing 132.

[0123] A ring groove 137 is formed on the upper section of the outer housing 132 along the inner circumferential surface in order to accommodate a stopper ring 172 for fixing the stopper 166.

[0124] The stopper 166 is arranged on the receiving section 135 of the outer housing 132 and is fixed by the stopper ring 172, which is installed in the ring groove 137.

[0125] The elastic element 174 is inserted between the deformation element 148 and the stopper 166, is compressed when the deformation element 148 is extended, and thereby generates an elastic force on the deformation element 148.

[0126] One end of the elastic element 174 is supported by the stopper 166 and the other end of it is supported by the deformation element 148, and the elastic element 174 can be a helical spring (e.g. helical compression spring).

[0127] Thus, the elastic element 174 is compressed when the deformation element 148 advances (or moves forward) on the fixing rod 146.

[0128] On the other hand, when the deformation element 148 is contracted, the compression of the elastic element 174 is released, and the elastic element 174 generates an elastic force on the deformation element 148, so that the deformation element 148 quickly returns to its original position.

[0129] A fixing projection 167 is designed so that it protrudes from the stopper 166, so that the elastic element 174 is fixed under the stopper 166.

[0130] The fixing projection 167 is inserted into the inner circumferential surface of one end of the elastic element 174 and thereby securely supports the elastic element 174, the other end of which is placed on the deformation end 148.

[0131] In the drawings, each of the four first openings 138, each of the four second openings 154, each of the four bypass holes 142, and each of the four flow openings 158 are formed along the circumferential direction (essentially) at intervals of 90° (e.g., distributed around the circumference), and each of the three through holes 168 (e.g., with the exception of the through hole 168 formed in the center) is formed along the circumferential direction at intervals of 120° (e.g., distributed around the circumference). However, these are not limited to this; rather, the position and number of each opening 138 and 154, each bypass hole 142, each flow hole 158, and each through hole 168 can be changed.

[0132] A sealing ring 176 can be arranged between the end cap 178 provided on the installation section 103 and the fixing element 134 of the outer housing 132, so that the operating fluid introduced into the housing 101, e.g. the coolant, does not leak out apart from the second outlet 107b and so that it does not leak out between the end cap 178 and the fixing element 134.

[0133] This means that the sealing ring 176 seals between the outer circumferential surface of the fixing element 134 and the end cap 178, which is provided on the installation section 103, and thereby prevents the coolant from leaking along the outer circumferential surface of the fixing element 134 of the outer housing 132.

[0134] Fig. Figure 9 is a drawing to illustrate the actuation of the valve unit applied to the cylindrical heat exchanger according to numerous embodiments of the present invention.

[0135] As in Fig. As shown in Figure 9, the operating fluid flows at a predetermined temperature through the second inlet 105b, and the operating fluid flows through the through holes 168 of the stopper 166 into the interior of the outer casing 132 and the inner casing 152.

[0136] Then the deformation element 148 moves forward on the fixing rod 146 due to the expansion (e.g., stretching) of the wax material inside the deformation element 148.

[0137] As a result, the flange element 156, which is fixed to the lower section of the deformation element 148, moves forward together with the deformation element 148. Simultaneously, the inner housing 152, together with the flange element 156, moves within the outer housing 132 in the direction of the second inlet 105b.

[0138] In this case, the elastic element 174 is compressed and at the same time the bypass hole 142 is closed by means of the inner housing 152.

[0139] The second openings 154 are positioned (essentially) corresponding to the first openings 138 (e.g., partially or sectionally overlapping the first openings 138). Simultaneously, the first openings 138, which are positioned on the side of the fixing element 134 of the outer housing 132, are opened by the forward-moving (or raised) inner housing 152, and the coolant flows into the assembly space (S) of the housing 101 and through the second connecting line 113b.

[0140] When the operating fluid flows into the second inlet 105b at a temperature below a predetermined temperature, the deformation element 148 moves downwards (or backwards) on the fixing rod 146.

[0141] In this case, the elastic element 174 generates an elastic force on the deformation element, so that the deformation element 148 quickly returns to its original position.

[0142] Then the inner housing 152, together with the flange element 156 fixed to the deformation element 148, moves backwards, thus opening the bypass holes 142 and simultaneously closing the first openings 138.

[0143] In numerous embodiments, a cover 180, which closes the assembly space (S), can be arranged on the housing 101, and the cover 180 prevents the coolant introduced into the assembly space (S) from leaking out to the outside.

[0144] The functions and processes of the cylindrical heat exchanger 100 according to numerous embodiments of the present invention are explained below.

[0145] The characters Fig. 10A, Fig. 10B, Fig. 11A and Fig. Figure 11B shows drawings illustrating the operation of a cylindrical heat exchanger for a vehicle according to numerous embodiments of the present invention.

[0146] If - as in Fig. 10A and Fig. 10B shown - if the temperature of the coolant introduced into the second inlet 105b is lower than a predetermined temperature, the deformation element 148 maintains the original position, since the temperature of the coolant introduced through the through holes 168 of the stopper 166 is lower than a temperature at which the deformation element 148 is deformed.

[0147] Since the deformation element 148 does not move forward on the fixing rod 146, the inner housing 152 also maintains the original position (referring to Fig. 6) upright, and the bypass holes 142 of the outer casing 132 are open.

[0148] Since, as explained above, the closed section of the inner housing 152 closes the first openings 138 and the second openings 154 are positioned on the closed section of the outer housing 132, the outer housing 132 and the interior of the inner housing 152 are closed.

[0149] This prevents the coolant introduced into housing 101 from flowing into the second connecting line 113b.

[0150] The coolant flows from the valve unit 130 through the open bypass holes 142 and the bypass channel 121 and is discharged through the second outlet 107b. The coolant does not flow into the heat dissipation unit 110.

[0151] Accordingly, the coolant does not flow into the second connecting line 113b of the heat dissipation unit 110 and the coolant does not perform any heat exchange with the transmission oil, which is introduced through the first inlet 150a and flows through the first connecting line 113a of the heat dissipation unit 110.

[0152] If the transmission oil needs to be warmed up according to a vehicle condition or mode, such as a driving condition, an idle mode, or an initial start-up, the bypass channel 121 prevents the low-temperature coolant from flowing into the second connecting line 113b. This prevents the transmission oil temperature from being lowered by heat exchange with the coolant.

[0153] If, on the other hand, the coolant temperature is higher than the predetermined temperature, it moves – as in Fig. 11A and Fig. 11B shown - by means of the coolant introduced through the through holes 138 of the stopper 166, the deformation element 148 of the valve unit 130 moves forward on the fixing rod 146.

[0154] In this case, the flange element 156 moves forward together with the deformation element 148, and the inner housing 152 moves inside the outer housing 132 in the direction of the second inlet 105b.

[0155] Referring to Fig. 9. The bypass holes 142 are closed by the closed end of the inner housing 152, and the second openings 154 are positioned (essentially) corresponding to the first openings 138. Thus, the interior of the inner housing 152 is opened.

[0156] In this way, the first openings 138 and the second openings 154 connect the interior of the inner housing 152 with the outside of the outer housing 132, and in this way the valve unit 130 is opened.

[0157] Then the coolant introduced into the valve unit flows, in a state in which flow into the bypass channel 121 through the closed bypass hole 142 is prevented, through the first openings 138 and the second openings 154, through the assembly space (S) separated by the partition plate 120, through the outer space of the heat dissipation unit 110, through the second connecting line 113b and through the second outlet 107b.

[0158] The coolant flows through the second connecting line 113b of the heat dissipation unit 110, and the transmission oil flowing through the first connecting line 113a exchanges heat with the coolant flowing through the second connecting line 113b in the assembly space (S) of the housing 101. This regulates the temperature of the transmission oil.

[0159] The transmission oil and the coolant flow in different or opposite directions and exchange heat because the first inlet 105a and the second inlet 105b are located in opposite positions on the upper section or side section (e.g., the side surface) of the housing 101. In this way, the transmission oil exchanges heat more effectively with the coolant.

[0160] Meanwhile, the transmission oil flows from the automatic transmission 40 into the first inlet 105a, flows through the first connecting line 113a of the heat dissipation unit 110 in the assembly space (S) of the housing 101 and is released through the first outlet 107a in order to exchange heat with the coolant optionally by actuating the valve unit 130.

[0161] Thus, the transmission oil, whose temperature is increased by the operation of the automatic transmission 40, is cooled by heat exchange with the coolant in the heat dissipation unit 110 of the cylindrical heat exchanger 100 and is then supplied to the automatic transmission 40.

[0162] This means that since the heat exchanger 100 supplies the cooled transmission oil to the automatic transmission 40, which is rotated at high speed, the occurrence of slippage in the automatic transmission 40 is prevented.

[0163] The deformation element 148 of the valve unit 130 moves forward or backward on the fixing rod 146 according to the temperature of the coolant to adjust the position of the inner housing 152, and simultaneously closes or opens each of the openings 138 and 154, thus allowing the coolant to flow through the bypass channel 121 or through the first openings 138 and the second openings 154. Accordingly, the heat exchanger 100, according to numerous embodiments of the present invention, can control the flow of the coolant flowing through the heat exchanger 100.

[0164] When the cylindrical heat exchanger 100 is used according to numerous embodiments of the present invention, the respective operating fluids can be heated and cooled simultaneously, since during the heat exchange of the operating fluids, the valve unit 130 selectively controls the flow of an operating fluid according to the temperature of the operating fluid in the driving state or in the initial start-up state. Thus, the temperatures of the operating fluids can be effectively controlled.

[0165] Furthermore, since the temperatures of the operating fluids can be adjusted according to the vehicle condition by actuating the valve unit 130, and the heat exchanger is designed in a cylindrical shape which can improve heat exchange efficiency and reduce weight and size, it is possible to reduce fuel consumption, improve the heating performance of the vehicle, simplify the design of the engine compartment, and easily ensure the mounting space for the components.

[0166] The valve unit 130, to which the deformation element 148 is applied with, for example, the wax material which expands or contracts according to the temperature (e.g., according to the introduced operating fluid), can selectively supply the operating fluid and thus the flow of the operating fluid can be precisely controlled.

[0167] Since the valve unit 130 is mounted in the cylindrical heat exchanger 100, additional control valves and branch lines for controlling the flow of the operating fluids can be omitted. This reduces manufacturing costs and improves processing characteristics (e.g., assembly properties).

[0168] If the operating fluid is the automatic transmission fluid (type 40), friction (e.g., hydraulic friction) during cold starts can be reduced due to rapid warm-up. Furthermore, slippage during driving can be prevented and durability maintained thanks to excellent cooling performance. This can improve fuel efficiency and transmission longevity.

[0169] Furthermore, since the valve response for opening and closing is improved according to the temperature of the operating fluid, the commercial value is increased.

[0170] For the sake of simplicity in description and precise definition in the attached claims, the terms "upper", "lower", "inner" and "outer" are used to describe features of the exemplary embodiments with reference to the positions of such features as shown in the figures.

[0171] The preceding descriptions of the specific exemplary embodiments of the present invention serve the purpose of illustration and description. They are not intended to be exhaustive or to limit the invention to the exact form disclosed, and it is obvious that many modifications and variations are possible in light of the teaching above. The exemplary embodiments were selected and described to explain certain principles of the invention and their practical application, and thereby to enable the person skilled in the art to manufacture and use the various embodiments of the present invention, as well as their numerous alternatives and modifications. It is intended that the scope of protection of the invention is defined by the stated claims and their equivalents.

Claims

[1] A cylindrical heat exchanger (100) comprising: a housing (101) which is cylindrical with one closed side and one open side, which has an internal mounting space (S), and which is designed with at least one inlet (105) and at least one outlet (107), wherein the inlet (105) or outlet (107) is provided on the closed side and / or on the side surface of the housing (101), and a heat dissipation unit (110) installed in the mounting space (S) of the housing (101), which is equipped with connecting lines (113) formed alternately by stacking a plurality of plates (111), one of the connecting lines (113) being connected to the mounting space (S), the heat dissipation unit (110) receiving operating fluids from the inlet (105) and the operating fluids performing heat exchange with each other, characterized by , that the housing (101) is formed in one piece with an installation section (103) which is provided on one side of a side surface of the housing (101) and is connected to the mounting space (S), The cylindrical heat exchanger (100) further comprises a partition plate (120) that divides the assembly space (S) and the interior of the installation section (103), which is connected to the inlet (105) formed on the installation section (103) and the outlet (107) formed on the side surface of the housing (101) and which forms a bypass channel (121) separately from the connecting lines (113) of the heat dissipation unit (110), The cylindrical heat exchanger (100) further comprises a valve unit (130) installed at the inlet (105) formed on the installation section (103), which passes through the partition plate (120) in the installation section (103), selectively opening and closing the assembly space (S) or the bypass channel (121) divided by the partition plate (120) using a linear displacement generated when expansion or contraction occurs according to the temperature of the operating fluid introduced by the inlet (105), and regulating the flow of the operating fluid. the valve unit (130) has: an outer housing (132) which is inserted from an outside of the installation section (103) towards the second inlet (105), wherein the outer housing (132) a fixing element (134) in which a mounting groove (133) is integrally formed on an inner surface thereof and which is mounted on an outside of the installation section (103) on an opposite side of the second inlet (105), an insertion section (136) which is integrally formed on the fixing element (134), at least one first opening (138) which is formed along a longitudinal direction corresponding to the assembly space (S) divided by means of the partition plate (120), and has at least one bypass hole (142) which is formed corresponding to the bypass channel (121), a fixing rod (146) which is inserted into the outer housing and which is fixed at one end to the mounting groove (133) of the fixing element (134), a deformation element (148) which is mounted on the fixing rod (146) and is moved on the fixing rod (146) by the expansion or contraction according to a temperature change of the operating fluid, an inner housing (152) in which at least a second opening (154) is formed along a longitudinal direction corresponding to the first opening (138) of the outer housing (132) and which is slidably inserted in the outer housing (132), a flange element (156) which is fixed in the inner housing (152) on a lower section of the inner housing (152) and which is fixed on a lower section of the deformation element (148), a stopper (166) which is fixed on the opposite side of the fixing element (134) of the outer housing on the insertion section (136), and an elastic element (174) which is inserted between the deformation element (148) and the stopper (166), is compressed when the deformation element (148) expands and generates an elastic force on the deformation element (148). [2] The cylindrical heat exchanger (100) according to claim 1, wherein the inlet (105) has a first inlet (105a) formed on the housing (101) and a second inlet (105b) formed on the installation section (103), and the outlet has a first outlet (107a) formed on the housing (101) and spaced apart from the first inlet (105a) and a second outlet (107b) formed on the side surface of the housing (101) and spaced apart from the second inlet (105a). [3] The cylindrical heat exchanger (100) according to claim 2, wherein the first inlet (105a) is formed at a position opposite the second inlet (105b) and the first outlet (107a) is formed at a position opposite the second outlet (107b). [4] The cylindrical heat exchanger (100) according to one of claims 1 to 3, wherein each plate (111) of the plurality of plates (111) corresponding to the housing (101) is formed in a disk-shaped form and one side of the plate (111) corresponding to the partition plate (120) is formed in a linear form. [5] The cylindrical heat exchanger (100) according to one of claims 2 to 4, wherein in each plate (111) of the plurality of plates (111) a first connecting hole (114) and a second connecting hole (115) are formed corresponding to the first inlet (105a) and the first outlet (107a). [6] The cylindrical heat exchanger (100) according to one of claims 2 to 5, wherein in each plate (111) of the plurality of plates (111) a plurality of projections (116) with predetermined distances protrude and a distribution projection (117) is formed from a center of each plate (111) of the plurality of plates (111) towards an outer circumferential surface facing the separating plate (120). [7] The cylindrical heat exchanger (100) according to claim 6, wherein each projection (116) of the plurality of projections (116) is formed in a semicircular shape and protrudes in the same direction as the distribution projection (117). [8] The cylindrical heat exchanger (100) according to any one of claims 1 to 7, wherein the fixing element (134) of the outer housing (132) is fixed to the installation section (103) by a retaining ring (144) of an end cap (178) which is mounted on an outer surface of the installation section (103). [9] The cylindrical heat exchanger (100) according to any one of claims 1 to 8, wherein the outer casing (132) is a cylinder whose upper end is open. [10] The cylindrical heat exchanger (100) according to one of claims 1 to 9, wherein the bypass hole (142) and the first opening (138) are formed at a distance from each other along a longitudinal direction of the outer casing (132). [11] The cylindrical heat exchanger (100) according to any one of claims 1 to 10, wherein the first openings (138) are formed along a longitudinal direction of the outer casing (132) at a distance from the bypass hole (142) on a lower section of the outer casing (132). [12] The cylindrical heat exchanger (100) according to any one of claims 1 to 11, wherein the inner housing (152) is a cylinder whose two ends are open. [13] The cylindrical heat exchanger (100) according to one of claims 1 to 12, wherein the second openings (154) are designed such that they are arranged offset from each other at a predetermined angle along the circumferential direction of the inner housing (152). [14] The cylindrical heat exchanger (100) according to any one of claims 1 to 13, wherein the inner housing (152) is moved in the outer housing (132) by expansion of the deformation element (148) in the direction of the second inlet (105b), so that the second opening (154) is positioned at the first opening (138) to open the first opening and to close the bypass hole (142) by means of the inner housing (152). [15] The cylindrical heat exchanger (100) according to any one of claims 1 to 14, wherein the inner housing (152) is installed during the initial assembly by closing the first opening (138) by means of the inner housing (152) and closing the second opening (154) by means of the outer housing (132). [16] The cylindrical heat exchanger (100) according to any one of claims 1 to 15, wherein the deformation element (148) is a wax material which expands or contracts according to the temperature of the operating fluid. [17] The cylindrical heat exchanger (100) according to any one of claims 1 to 16, wherein flow holes (158) are formed along an outer circumference of the flange element (156) at positions arranged at a predetermined angle apart from each other. [18] The cylindrical heat exchanger (1ββ) according to one of claims 1 to 17, wherein an outer circumferential surface of the flange element (156) is fixed to an inner circumferential surface of the inner housing (152) and an installation part (162) formed at a center thereof is fixed to the deformation element (148) by a fixing ring (164). [19] The cylindrical heat exchanger (100) according to any one of claims 1 to 18, wherein at least one through-hole (168) is formed in the stopper (166) so that the operating fluid flows into the valve unit (130). [20] The cylindrical heat exchanger (100) according to claim 19, wherein through holes (168) are formed in a center and along a circumferential direction of the stopper (166). [21] The cylindrical heat exchanger (100) according to any one of claims 1 to 20, wherein a fixing projection (167) is designed to protrude from the stopper (166) so that the elastic element (174) is fixed under the stopper (166). [22] The cylindrical heat exchanger (100) according to one of claims 1 to 21, wherein a receiving section (135) on which the stopper (166) is seated is formed on the outer housing (132). [23] The cylindrical heat exchanger (100) according to one of claims 1 to 22, wherein an annular groove (137) is formed on an upper inner circumferential surface of the outer housing (132) so that a stopper ring (172) for fixing the stopper (166) is received therein. [24] The cylindrical heat exchanger (100) according to any one of claims 1 to 23, wherein one end of the elastic element (174) is supported by the stopper (166) and another end of it is supported by the deformation element (148) and wherein the elastic element (174) is a helical spring. [25] The cylindrical heat exchanger (100) according to any one of claims 1 to 24, wherein one of the operating fluids is a coolant introduced by a cooler (20) and the other of the operating fluids is a transmission oil introduced by an automatic transmission (40). [26] The cylindrical heat exchanger (100) according to claim 25, wherein the transmission oil flows through the first inlet (105a), the first outlet (107a) and the heat dissipation unit (110) and the coolant flows through the second inlet (105b) and the second outlet (107b), and the connecting lines (113) have a first connecting line (113a) in which the transmission oil flows, and a second connecting line (113b) in which the coolant flows. [27] The cylindrical heat exchanger (100) according to any one of claims 1 to 26, wherein an end of the partition plate (120) positioned in the assembly space (S) is bent at a predetermined angle in relation to another end of the partition plate (120) positioned in the installation section (103). [28] The cylindrical heat exchanger (100) according to one of claims 1 to 27, wherein a through-opening (123) is formed in the partition plate (120) at one end of the partition plate (120), which corresponds to the heat dissipation unit (110). [29] The cylindrical heat exchanger (100) according to any one of claims 1 to 28, wherein a cover (180) closing the mounting space (S) is arranged on the housing (101).

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