JP2013029303A - Double pipe-type heat exchanging pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double pipe-type heat exchanging pipe capable of reducing manufacturing costs and being quickly manufactured as manufacturing is simple and a separate processing on an external pipe is unnecessary.SOLUTION: A gaseous or liquid refrigerant is passed through a flow channel hole to cool an inner pipe, the gaseous or liquid refrigerant supplied through a through-hole of an outer pipe is collected in a first collection groove formed on the inner pipe, the gaseous and liquid refrigerants are continuously collided with a plurality of projections while passing through a spiral groove of the inner pipe so that the gaseous and liquid refrigerants are cooled by heat exchange action, and the cooled gaseous and liquid refrigerants are collected in a second collection groove of the inner pipe and discharged to the external through the through-hole of the outer pipe. As the gaseous or liquid refrigerant is collected in the first and second collection grooves of the inner pipe, so that it can be easily supplied and discharged continuously. By the through-hole punching work for allowing the gaseous or liquid refrigerant to pass through an outer surface of the outer pipe, merits that manufacturing can be simplified, the separate processing on the external pipe 200 becomes unnecessary, a volume/area can be minimized, the manufacturing costs can be reduced, and the double pipe-type heat exchanging pipe can be quickly manufactured, can be achieved.

Description

  The present invention relates to a double-tube heat exchange pipe, and more specifically, gas and liquid pass through a spiral groove of an inner tube, continuously collide with a plurality of protrusions, and are cooled by a heat exchange action. The present invention relates to a double-tube heat exchange pipe in which liquid collects in a second collecting groove and is discharged through a through hole.

  In general, air conditioners used in vehicles cool and heat the interior of automobiles in summer and winter, or remove frost attached to windshields in rainy and winter seasons, ensuring the driver's front and rear view. Will be able to.

  The air conditioner includes a heating system and a cooling system at the same time, selectively introduces outside air or inside air, heats or cools the air, and then blows the air into the car interior. The room is cooled, heated or ventilated.

  The air conditioner is provided with a double-pipe internal heat exchanger that cools the air supplied to the interior of the automobile, and FIG. 5 is a cross-sectional view showing the double-pipe internal heat exchanger.

  A low-pressure channel 11 is formed inside, and an outer tube is formed with a spiral portion 12 through which high pressure is passed. A flow path 21 is formed, and an outer pipe 20 is connected to inlet / outlet pipes 22 and 23 through which gas is supplied and discharged to the outer peripheral surfaces of both end portions.

  Here, the refrigerant passes through the low pressure flow path 11 of the internal pipe 10, the internal pipe 10 is cooled, and the gas passes through the high pressure flow path 21 formed by the spiral portion 12 of the internal pipe 10, The gas is cooled by the heat exchange with the inner pipe 10 and supplied to the inside of the automobile.

  In addition, the outer peripheral surface of the outer tube 20 is formed to have the same diameter as the inner tube 10, and both end portions of the outer peripheral surface of the outer tube 20 to which the inlet / outlet pipes 22 and 23 are coupled have a predetermined width. The expanded part 24 expanded by the process is formed.

  Furthermore, any one of the expanded pipe portions 24 of the outer pipe 20 collects a predetermined amount so that the gas supplied through the inlet pipe 22 is continuously supplied to the high-pressure channel 21, and the like. One of them collects a predetermined amount so that the gas cooled by the heat exchange action is continuously discharged through the discharge pipe 23.

  However, as described above, in order to continuously supply and discharge the gas to the inlet / outlet pipes 22 and 23, the structure in which the expanded portion 24 is formed in the outer tube 20 to collect the gas is There is an inconvenience that the expanded pipe portion 24 must be formed in a specific section. With the formation of the expanded pipe portion 24, the volume area of the outer pipe 20 increases, the manufacturing cost for manufacturing the outer pipe 20 increases, and the production period increases. There is a problem that takes time.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to cool the inner pipe by passing a gas or liquid refrigerant through the flow path hole, and to The gas or liquid refrigerant supplied through the through hole is concentrated in the first collecting groove formed in the inner tube, the gas or liquid refrigerant is passed through the spiral groove of the inner tube, and continuously collides with the plurality of protrusions, Gas or liquid refrigerant is cooled by the heat exchange action, and the cooled gas or liquid refrigerant is concentrated in the second collecting groove of the inner tube and discharged to the outside through the through hole of the outer tube. Is to provide a pipe.

  Further, the diameter of the through hole of the outer pipe is formed smaller than the width of the first and second collecting grooves of the inner pipe, so that gas or liquid refrigerant is continuously supplied through the through hole of the outer pipe or It is to provide a double-pipe heat exchange pipe that is discharged.

  In order to achieve the object of the present invention as described above, the double-tube type heat exchange pipe according to the present invention is hollow and has a passage hole through which a gas or liquid refrigerant passes, along the longitudinal direction on the outer surface. The first and second spiral grooves are formed at a predetermined interval, a plurality of protrusions are projected along the spiral groove, and gas or liquid refrigerant is concentrated at both ends of the spiral groove. The inner tube in which the collecting grooves are formed, and hollow, tightly coupled to the outer surface of the inner tube, and through holes communicating with the first and second collecting grooves of the inner tube at both ends of the outer peripheral surface It is characterized by comprising an outer pipe formed.

  The double pipe heat exchange pipe according to the present invention is characterized in that the diameter of the through hole of the outer pipe is smaller than the width of the first and second collecting grooves of the inner pipe.

  The double-tube heat exchange pipe according to the present invention is characterized in that a plurality of protrusions are formed on the outer surfaces of the first and second collecting grooves.

  In the double-tube heat exchange pipe according to the present invention, the inner tube is formed of any one material of aluminum, copper, or copper alloy.

  In the double-tube heat exchange pipe according to the present invention, the first and second collecting grooves are formed in any one of a hemispherical shape, an elliptical shape, and a polygonal shape.

  In the double-tube heat exchange pipe according to the present invention, the protrusion is formed in any one of a circular shape, a hemispherical shape, an elliptical shape, and a polygonal shape.

  According to the double pipe type heat exchange pipe of the present invention, gas or liquid refrigerant is concentrated in the first and second collecting grooves of the inner pipe, and continuous supply and discharge are easy. It is easy to manufacture by punching the through-hole through which the refrigerant passes, and there is no need for another processing on the outer tube, minimizing the volume area, reducing manufacturing costs, and enabling rapid manufacturing. There are benefits.

It is a general | schematic route figure which shows the state in which the double pipe type heat exchange pipe by this invention was installed in the cooling device for vehicles. It is a perspective view which shows the double pipe type heat exchange pipe by this invention. It is a disassembled perspective view of the double pipe type heat exchange pipe by this invention. It is a sectional side view which shows the state in which the double tube type heat exchange pipe by this invention is used. It is sectional drawing which shows the double pipe type internal heat exchanger by a prior art.

  Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

  FIG. 1 is a schematic view showing a state in which a double-pipe heat exchange pipe according to the present invention is installed in a vehicle cooling device, and FIG. 2 is a perspective view showing the double-pipe heat exchange pipe according to the present invention. FIG. 3 is an exploded perspective view of the double tube heat exchange pipe according to the present invention, and FIG. 4 is a side sectional view showing a state in which the double tube heat exchange pipe according to the present invention is used.

  The inner tube 100 is hollow and has a flow passage hole 101 through which a gas or liquid refrigerant passes. An annular spiral groove 102 is formed on the outer surface at a predetermined interval along the longitudinal direction. A plurality of protrusions 103 are formed so as to project along 102, and first and second collecting grooves 104 a and 104 b for collecting gas or liquid refrigerant are formed at both ends of the spiral groove 102.

  The inner tube 100 is cooled by passing a gas or liquid refrigerant through the channel hole 101.

  The inner pipe 100 collects gas or liquid refrigerant supplied from the outside in the first collecting groove 104a, and the gas or liquid refrigerant is continuously supplied to the spiral groove 102, and the second collecting groove 104b. The cooled gas or liquid refrigerant is collected and the gas or liquid refrigerant is continuously discharged to the outside.

  It is preferable that the first and second collecting grooves 104a and 104b are formed wider than the diameter of the through hole 201 of the outer pipe 200.

  The first and second collecting grooves 104a and 104b are formed in any one of a hemispherical shape, an elliptical shape, and a polygonal shape.

  A plurality of protrusions 103 ′ are formed to protrude from the outer surfaces of the first and second collecting grooves 104 a and 104 b, and a gas or liquid refrigerant concentrating on the first collecting grooves 104 a continues to the protrusion 103 ′. The cooled gas or liquid refrigerant that collides and is supplied to the spiral groove 102 after the heat exchange action to increase the cooling efficiency and collects in the second collecting groove 104b is transferred to the second collecting groove 104b. By colliding with the protrusion 103 ′, it is continuously cooled and discharged to the outside.

  The internal tube 100 allows gas or liquid refrigerant to collide with a plurality of protrusions 103 formed along the spiral groove 102 by passing gas or liquid refrigerant through the spiral groove 102, thereby enabling rapid cooling. Done.

  In the inner tube 100, the space between the spiral grooves 102 is narrowed, so that the speed of the temperature change of the gas or liquid refrigerant cooled via the spiral grooves 102 is increased. By widening, the changing speed of the gas or liquid refrigerant to be cooled decreases.

  The interval and angle of the spiral groove 102 can be adjusted and manufactured according to the user's selection.

  In the inner pipe 100, the rate of temperature drop of the gas or liquid refrigerant changes depending on the number of the protrusions 103 and 103 ′ that exchange heat with gas, and the number of the protrusions 103 and 103 ′ depends on the user's selection. Can be adjusted and manufactured.

  The protrusions 103 and 103 ′ of the inner tube 100 are formed in any one of a circular shape, a hemispherical shape, an elliptical shape, and a polygonal shape.

  The inner tube 100 is made of any one material of aluminum, copper, or copper alloy.

  The inner tube 100 is preferably made of a copper material having excellent thermal conductivity, and can be made of a non-ferrous metal material at the user's option.

  The outer tube 200 is hollow and is tightly coupled to the outer surface of the inner tube 100, and through holes 201 communicating with the first and second collecting grooves 104a, 104b of the inner tube 100 are formed at both ends of the outer peripheral surface. It is formed.

  The outer pipe 200 is tightly coupled to the outer surface of the inner pipe 100 and guides the gas or liquid refrigerant through the spiral groove 102.

  The outer pipe 200 is supplied with gas or liquid refrigerant through any one of the through holes 201 and discharges gas or liquid refrigerant through the other through hole 201.

  In the outer pipe 200, an inlet pipe 301 and an outlet pipe 302 are provided in the through hole 201, respectively.

  The outer tube 200 is preferably formed in a cylindrical shape with a flat outer surface.

  The outer pipe 200 is formed such that the diameter of the through hole 201 is smaller than the width of the first and second collecting grooves 104a, 104b of the inner pipe 100.

  The double-tube heat exchange pipe according to the present invention configured as described above is used as follows. In the present invention, the double-tube heat exchange pipe is installed in the vehicle cooling device as an example. ,explain.

  First, a compressor 400 for compressing a gas is provided, connected to the compressor 400, a capacitor 500 for condensing the gas discharged from the compressor 400 is provided, connected to the capacitor 500, An external pipe 200 to which high-temperature and high-pressure liquid refrigerant discharged from the capacitor 500 is supplied is formed. The external pipe 200 is provided in the external pipe 200, and the liquid refrigerant supplied to the external pipe 200 is formed on the outer surface. An internal pipe 100 is provided to pass through the spiral groove 102, and is connected to the external pipe 200. The liquid refrigerant discharged through the spiral groove 102 of the internal pipe 100 is decompressed and expanded to form a low-temperature and low-pressure gas refrigerant. An expansion valve 600 to be changed is provided, and is connected to the expansion valve 600 to change the low-temperature and low-pressure gas refrigerant into the low-temperature and low-pressure liquid refrigerant. Evaporator 700 is provided, the evaporator 700 is connected to one end of the inner tube 100 so as to communicate with the passage hole 101, a structure in which the other end is connected to the compressor 400. At this time, when the cooling device is operated, the high-temperature and high-pressure gas discharged from the compressor 400 is supplied to the condenser 500, and the high-temperature and high-pressure liquid refrigerant condensed by the condenser 500 is supplied to the external pipe 200. The high-temperature and high-pressure liquid refrigerant supplied to the outer pipe 200 passes through the spiral groove 102 of the inner pipe 100, but is continuously cooled against a plurality of protrusions 103, and the cooled liquid refrigerant is The expansion valve 600 changes to a low-temperature and low-pressure gas refrigerant and is supplied to the evaporator 700, and the low-temperature and low-pressure liquid refrigerant discharged from the evaporator 700 is compressed through the channel hole 101 of the inner pipe 100. The internal pipe 100 is cooled and the liquid refrigerant passing through the spiral groove 102 of the cooled internal pipe 100 is cooled by heat exchange. It is.

  The above process is repeated to cool the air blown into the vehicle interior.

  Further, the low-temperature and low-pressure gaseous refrigerant that has flowed into the evaporator 700 evaporates by exchanging heat with the air blown into the vehicle interior, and the air blown into the vehicle cabin due to the endothermic action of the latent heat of vaporization of the refrigerant. Is cooled to change to a low-temperature and low-pressure refrigerant.

  Further, the liquid refrigerant supplied through the outer pipe 200 is collected in the first collecting groove 104a of the inner pipe 100, and the liquid refrigerant collected in the first collecting groove 104a is transferred to the spiral groove 102. The liquid refrigerant supplied and cooled by the heat exchange action and cooled through the spiral groove 102 is concentrated in the second concentration groove 104b, and the liquid refrigerant concentrated in the second concentration groove 104b is The expansion valve 600 is supplied through the through hole 201 of the outer pipe 200.

  The flow of the liquid refrigerant supplied to the spiral groove 102 and the expansion valve 600 is continued by the liquid refrigerant collected in the first and second collecting grooves 104a and 104b.

  The first and second collecting grooves 104a, 104b can be formed in any one of a hemispherical shape, an elliptical shape, or a polygonal shape according to the user's selection.

  On the other hand, the inner pipe 100 is formed such that the width of the first and second collecting grooves 104a, 104b is wider than the diameter of the through hole 201 of the outer pipe 200, so that the amount of liquid refrigerant to collect is reduced. The increase in the amount of liquid refrigerant supplied to the spiral groove 102 and the expansion valve 600 is prevented from decreasing.

  A plurality of protrusions 103 ′ are formed on the outer surfaces of the first and second collecting grooves 104 a, 104 b, and gas or liquid refrigerant that collects in the first collecting grooves 104 a is formed on the protrusions 103 ′. After the continuous collision and heat exchange, the cooling efficiency is increased by being supplied to the spiral groove 102, and the cooled gas or liquid refrigerant concentrated in the second concentration groove 104b is transferred to the second concentration groove 104b. By being collided with the protrusion 103 ′, it is continuously cooled and discharged to the outside.

  In addition, since the interval between the spiral grooves 102 of the inner tube 100 is narrowed, the speed of the temperature change of the gas or liquid refrigerant cooled via the spiral groove 102 is increased, and the interval between the spiral grooves 102 is widened. As a result, the changing speed of the cooled gas or liquid refrigerant is reduced.

  The interval and angle of the spiral groove 102 can be adjusted and manufactured according to the user's selection.

  In addition, the inner pipe 100 changes the speed of temperature drop of the gas or liquid refrigerant according to the number of the protrusions 103 and 103 ′ that exchange heat with gas, and the number of the protrusions 103 and 103 ′ The protrusions 103 and 103 ′ can be formed in any one of a circular shape, a hemispherical shape, an elliptical shape, and a polygonal shape.

  Depending on the shape of the protrusions 103 and 103 ′, the rate of temperature drop of the gas or liquid refrigerant may change.

  The inner tube 100 may be made of any one material of aluminum, copper, or copper alloy, and is preferably made of a copper material having excellent heat conductivity. It can also be made of material.

  Next, the outer tube 200 is tightly coupled to the outer surface of the inner tube 100 and guides the gas or liquid refrigerant to pass through the spiral groove 102, and the gas or liquid passes through any one of the through holes 201. The refrigerant is supplied, and the gas or liquid refrigerant is discharged through the other one of the through holes 201.

  At this time, it is preferable that an inlet pipe 301 and an outlet pipe 302 are provided in each of the through holes 201 to guide the supply and discharge of the liquid refrigerant.

  The outer pipe 200 is preferably formed in a cylindrical shape with a flat outer surface.

  Further, the outer pipe 200 is formed such that the diameter of the through hole 201 is smaller than the width of the first and second collecting grooves 104a, 104b of the inner pipe 100.

  In the present invention, a state in which a double-pipe heat exchange pipe is installed and used in a vehicular cooling device is described as an example, whereby a low-temperature and low-pressure liquid refrigerant is provided in the flow passage hole 101 of the inner pipe 100. Is passed, and the high-temperature and high-pressure liquid refrigerant is passed through the spiral groove 102 of the inner tube 100 to cool the liquid refrigerant. However, instead of the liquid refrigerant, the gas refrigerant is supplied by the cooling device. Can be used.

  As described above, the gas or liquid refrigerant supplied through the through-hole 201 of the outer pipe 200 is collected in the first collecting groove 104a of the inner pipe 100 and supplied to the spiral groove 102, and passes through the spiral groove 102. The structure in which the cooled gas or liquid refrigerant is collected in the second collecting groove 104b and discharged through the through hole 201 of the outer pipe 200 is the gas in the first and second collecting grooves 104a, 104b of the inner pipe 100. Alternatively, liquid refrigerant is concentrated and easy to supply and discharge continuously, and through-hole 201 punching work in which gas or liquid refrigerant passes through the outer surface of the outer pipe 200 is easy to manufacture. This process is unnecessary and the volume area is minimized.

  The cooling pipe according to the present invention described above is not limited to the above-described embodiment, and is ordinary in the field to which the present invention belongs without departing from the gist of the present invention claimed in the following claims. It can be said that anyone who has knowledge has the technical spirit of the present invention to the extent that various modifications can be made.

100: Inner pipe 101: Channel hole 102: Spiral groove 103, 103 ': Projection 104a: First collecting groove 104b: Second collecting groove 200: Outer pipe 201: Through hole 301: Inlet pipe 302: Outlet pipe 400 : Compressor 500: Condenser 600: Expansion valve 700: Evaporator

Claims (6)

A hollow channel hole 101 through which gas or liquid refrigerant passes is formed, an annular spiral groove 102 is formed on the outer surface along the longitudinal direction and spaced apart at a predetermined interval, and along the spiral groove 102, An inner pipe 100 in which a plurality of protrusions 103 are formed to protrude, and first and second collecting grooves 104a and 104b in which gas or liquid refrigerant is collected are formed at both ends of the spiral groove 102;
It is hollow, is tightly coupled to the outer surface of the inner tube 100, and has through holes 201 communicating with the first and second collecting grooves 104a, 104b of the inner tube 100 at both end portions of the outer peripheral surface. A double-tube heat exchange pipe comprising the tube 200.   2. The double according to claim 1, wherein the diameter of the through hole 201 of the outer pipe 200 is smaller than the width of the first and second collecting grooves 104 a and 104 b of the inner pipe 100. Tubular heat exchange pipe.   2. The double-tube heat exchange pipe according to claim 1, wherein a plurality of protrusions 103 ′ are formed on the outer surfaces of the first and second collecting grooves 104 a and 104 b.   The double pipe heat exchange pipe according to claim 1, wherein the inner pipe (100) is made of any one material of aluminum, copper, or copper alloy.   2. The double tube heat according to claim 1, wherein the first and second collecting grooves 104 a and 104 b are formed in any one of a hemispherical shape, an elliptical shape, and a polygonal shape. Replacement pipe.   The double-tube heat exchange according to claim 1 or 3, wherein the protrusions 103 and 103 'are formed in any one of a circular shape, a hemispherical shape, an elliptical shape, and a polygonal shape. pipe.

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