KR101139348B1 - Heat exchanger - Google Patents

Abstract

The present invention relates to a heat exchanger for selectively controlling and opening and closing the flow of the heat exchange medium flowing through the tube to adjust the heat exchange capacity according to the cooling and heating load. By installing a spring valve between the valves to improve the sealing properties to prevent leakage and minimize the friction surface to reduce the operating force of the slide valve and to improve the durability.

The present invention comprises a plurality of tubes (101) whose both ends are fixed to the upper and lower headers (140) (190) and arranged at regular intervals; It is coupled to the upper header 140 and built in the first tank 120 and the first tank 120 having the inlet and outlet pipes 121 and 122 formed on one side thereof, and are arranged to be offset from each other with a predetermined interval on the upper end. An upper tank 110 formed of a second tank 130 in which a pair of plurality of distribution holes 131 are formed and a recovery hole 134 is formed at one side thereof; First opening / closing means (160) installed slidably in the upper tank (110) to open and close the pair of distribution holes (131); A spring valve 165 is installed between the first opening and closing means 160 and the distribution hole 131 to improve sealing property and elastically opens and closes the distribution hole 131 during the sliding operation of the first opening and closing means 160. ); A control means (170) rotatably installed in the upper tank (110) to receive external power to operate the first opening / closing means (160); It is coupled to the lower header 190 is characterized in that it comprises a lower tank 191 in communication with the end of each tube 101 and in communication with the upper tank 110 through the return pipe 195.

Heat exchanger, header, tank, switchgear, control means, slide valve, spring valve

Description

Heat exchanger {HEAT EXCHANGER}

1 is a perspective view showing a general heat exchanger,

2 is a front view showing a conventional heat exchanger,

Figure 3 is a partial perspective view showing the upper side in a conventional heat exchanger

4 is a perspective view of a heat exchanger according to the present invention;

5 is an exploded perspective view showing a heat exchanger according to the present invention;

6 is a cross-sectional view showing a heat exchanger according to the present invention;

7 is a cross-sectional view taken along the line A-A in FIG.

8A is a partial perspective view illustrating a state in which a spring valve is installed in a heat exchanger according to the present invention;

8B is a cross-sectional view taken along the line B-B in FIG. 8A,

8C is a plan view of FIG. 8A,

9a to 9c are diagrams illustrating the operation of the heat exchanger according to the present invention.

<Description of the code used in the main part of the drawing>

100: heat exchanger 101: tube

102: heat radiation fins

110: upper tank 111: inlet passage

112: outlet passage 120: first tank

121: inlet pipe 122: outlet pipe

123,127: pressure guide 125: sealing member

126: protrusion

130: second tank 131: distribution hole

132: partition wall 133: support protrusion

134: recovery hole 135: partition

136: bypass hole 137: guide

138: home

140: upper header 141, 151: tube ball

142,152: Recovery Ball 150: Rubber

160: first opening and closing means 161: slide valve

162,181a: gear 163,183a: elastic member

165: spring valve 166: fixed portion

167: valve plate 167a: elastic projection

168: elasticity maintenance

170: control means 171: shaft

172: first gear 173: second gear

174: lever

180: second opening and closing means 181: transfer member

182: connecting member 182a: coupling groove

183: bypass valve 183b; Engaging protrusion

190: lower header 191: lower tank

195: return pipe

The present invention relates to a heat exchanger for selectively controlling and opening and closing the flow of the heat exchange medium flowing through the tube to adjust the heat exchange capacity according to the cooling and heating load. By installing a spring valve between the valves to improve the sealing properties to prevent leakage and minimize the friction surface to reduce the operating force of the slide valve and to improve the durability.

As is generally known, an air conditioner includes a cooling system and a heating system. The cooling system is a process in which a heat exchange medium discharged by driving a compressor is circulated back to a compressor through a condenser, a receiver dryer, an expansion valve, and an evaporator. It is configured to cool the interior of the vehicle by heat exchange by the evaporator through, and the heating system is configured to heat the interior by inflowing heat exchange medium (engine cooling water) to the heater core.

The condenser, the evaporator, the heater core, and the like, which heat exchange the heat exchange medium, are heat exchangers.

As shown in FIG. 1, the conventional heat exchanger includes a plurality of tubes 5 having both ends fixed to upper and lower headers 1 and 3 and spaced apart from each other by a predetermined interval, and the upper and lower headers 1 and 3, respectively. Upper and lower tanks 7 and 9 are coupled to form passages communicating with the ends of the respective tubes 5, and heat dissipation fins 11 are provided between the tubes 5 to increase the heat dissipation surface area.

The conventional heat exchanger configured as described above has one side in which a heat exchange medium supplied to a passage formed by the upper tank 7 and the upper header 1 is partitioned by a baffle while being mounted in an air conditioner, in particular an automobile air conditioner. After performing heat exchange with the air around the heat exchanger while passing through the tubes (5), the U-turn is made in the passage formed by the lower tank (9) and the lower header (3), this time passing through the other tubes (5) again. The heat exchange is performed and discharged through a passage formed by the upper tank 7 and the upper header 1.

As a conventional heat exchanger having a heat exchanger as described above is provided with a heat exchange medium (cooling water of a vehicle) regardless of a heating or cooling load, an additional control means is required to arbitrarily adjust the heat exchange capacity according to the heating or cooling load. For example, in the case of a heat exchanger used as a heater core of an automobile, in order to control the heat exchange capacity of the heat exchanger, a method of controlling the air flow through the heat exchanger by adjusting the number of revolutions of the blower or installing a door in front of the heat exchanger come. As described above, controlling the heat exchange force of the heat exchanger by controlling the air volume requires a separate device, so there is a problem in that no reliable control is performed.

In order to solve the above problems, Korean Patent Publication No. 170234, which is filed and registered by the present applicant, is fixed to both ends of the upper and lower headers 1 and 3 and arranged at equal intervals, as shown in FIGS. 2 and 3. The tube 5, the split supply means 13 connected to the upper header 1 to supply a heat exchange medium to a specific tube 5, and the lower header 3 connected to each of the tubes 5. It consists of a lower tank (9) in communication with the end.

The splitter supply means 13 includes a plurality of connection passages 15 communicating with an upper end of each tube 5 coupled to the upper header 1, and an inlet side of the connection passage 15 is within a predetermined angle range. A main body 17 having a cylindrical heat exchange medium dividing unit 19 formed therein, at least one heat exchange medium supply pipe 21 installed to communicate with the heat exchange medium dividing unit 19 formed on the main body 17, and Rotating member (2) rotatably installed in the heat exchange medium dividing unit (19) and blocking block (27) selectively blocking the inlet of the connection passage (15) communicating with the heat exchange medium dividing unit (19) 23 and the cover member 29 supporting the rotating shaft 25 and blocking the heat exchange medium partition 19.

In order to perform heat exchange with the heat exchange medium using the heat exchanger in the above state, first, the heat transfer medium is supplied through the heat exchange medium supply pipe 21 and the rotating member rotatably installed in the heat exchange medium divider 19. 23 is rotated according to the load applied to the heat exchanger, and as the rotational member 23 rotates, the blocking feather 27 selectively opens and closes the inlet of the connecting passage 15 to heat exchange the tube 5. Either the medium is supplied or the heat exchange medium is supplied to the entire tube (5).

When the inlet of the connecting passage 15 is formed on both sides, the blocking feathers 27 provided on both sides of the rotating member 23 open the ends of each tube 5 at the same time to exchange heat with some of the tubes 5. The media can be supplied, and the heat exchange medium can be adjusted by the rotation of the rotating member 23, so that the heat exchange capacity of the heat exchanger is arbitrarily adjusted.

As described above, the heat exchange medium can be selectively flowed through each tube 5 of the heat exchanger, and thus its performance can be arbitrarily adjusted to easily cope with heating or cooling loads.

However, the heat exchanger has an advantage of selectively controlling the amount of the heat exchange medium, but the heat exchange medium guided by the blocking blade 27 of the rotating member 23 is biased in the tube row on one side of the heat exchanger, In addition to the deterioration of the mixing performance, there was a problem that it is difficult to finely adjust the temperature due to a large step temperature deviation.

Meanwhile, Korean Patent Application No. 10-2004-0087396 (name: heat exchanger), filed by the present applicant as a technique for solving the above problem, is a distribution hole while a slide valve slides on an upper end of a tank in which distribution holes are formed. The heat exchange medium is distributed evenly in the tube to improve the heat exchange performance, and the distribution hole per tube can be configured with one step temperature difference and fine temperature control. Sliding type by slide valve simplifies the shape of header and tank and improves clamping operation.

However, when the slide valve opens and closes the distribution hole while sliding on the top surface of the tank, there is a problem that the heat exchange medium leaks when the plane roughness is unstable, and the sliding valve is caused by friction between the surface and the surface while the slide valve slides. There was also a problem of excessively increasing the operating power of.

An object of the present invention for solving the above problems is to improve the sealing property by installing a spring valve between the distribution hole and the slide valve for opening and closing it to prevent leakage and to minimize the friction surface to reduce the operating force of the slide valve And it is to provide a heat exchanger with improved durability.

The present invention for achieving the above object is a plurality of tubes are fixed at both ends and arranged at regular intervals in the upper and lower headers; The first tank is coupled to the upper header and the inlet and outlet pipes are formed on one side and a pair of plurality of distribution holes are formed in the first tank and arranged at an interval to be offset from each other, the recovery hole is formed on one side An upper tank composed of a second tank; A first opening and closing means slidably installed in the upper tank to open and close the pair of distribution holes; A spring valve installed between the first opening and closing means and the distribution hole to improve sealing property and elastically opening and closing the distribution hole during the sliding operation of the first opening and closing means; A control means rotatably installed in the upper tank and configured to operate the first opening and closing means by receiving external power; It is coupled to the lower header is characterized in that it comprises a lower tank in communication with the end of each tube and in communication with the upper tank through the return pipe.

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

Figure 4 is a perspective view showing a heat exchanger according to the present invention, Figure 5 is an exploded perspective view showing a heat exchanger according to the present invention, Figure 6 is a cross-sectional view showing a heat exchanger according to the present invention, Figure 7 is a cross-sectional view taken along line AA in FIG. 8A is a partial perspective view showing a state in which a spring valve is installed in a heat exchanger according to the present invention, FIG. 8B is a cross-sectional view taken along line BB of FIG. 8A, FIG. 8C is a plan view of FIG. 8A, and FIGS. 9A to 9C are The operating state diagram of a heat exchanger according to the present invention.

As shown, the heat exchanger 100 according to the present invention, the upper and lower headers 140, 190, both ends thereof are fixed and arranged at regular intervals and a plurality of tubes 101 to move the heat exchange medium,

It is coupled to the upper header 140, the one side is built in the first tank 120 and the first tank 120 and the first tank 120 is formed, the inlet and outlet pipes 121, 122 so that the heat exchange medium is introduced / discharged The upper tank 110 is composed of a second tank 130 is formed with a pair of plurality of distribution holes 131 are arranged to be shifted in a diagonal direction at a predetermined interval and the recovery hole 134 on one side,

A first opening / closing means (160) installed slidably inside the upper tank (110) for opening and closing the pair of distribution holes (131);

A spring valve 165 is installed between the first opening and closing means 160 and the distribution hole 131 to improve sealing property and elastically opens and closes the distribution hole 131 during the sliding operation of the first opening and closing means 160. )Wow,

A control means (170) rotatably installed in the upper tank (110) for specifying a supply amount of a heat exchange medium while operating the first opening / closing means (160) by receiving external power;

A lower tank coupled to the lower header 190 and in communication with an end of each tube 101 and in communication with the upper tank 110 to move (return) the heat exchange medium to the upper tank 110 through a return pipe 195. 191.

On the other hand, the heat dissipation fin 102 to promote heat exchange between the tubes 101 may be further interposed.

First, the structure of the upper tank 110 in more detail as follows.

The first tank 120 is formed in the form of the lower end is coupled to the upper header 140, the inlet, outlet pipes 121, 122 are formed in the same direction, respectively in communication with the inside on the upper side However, they may be formed in opposite directions.

In addition, the second tank 130 is built into the opened lower end side of the first tank 120, and the inside of the upper tank 110 is divided into an outlet passage 112 and an inlet passage 111 at one upper end. Partition 135 is formed so as to extend from the recovery hole 134.

That is, the outlet passage 112 communicates the recovery hole 134 and the outlet pipe 122, and the inlet passage 111 communicates the distribution hole 131 and the inlet pipe 121.

In addition, the partition 135 is formed with a bypass hole 136 for communicating the outlet passage 112 and the inlet passage 111, the inlet pipe 121 according to whether the bypass hole 136 is opened or closed. All of the heat exchange medium introduced through) may be supplied to the tube 101 side, or some of the introduced heat exchange medium may be supplied to the tube 101 side, and some may be directly bypassed to the outlet pipe 122.

In addition, a second opening and closing unit 180 is installed inside the upper tank 110 to selectively open and close the recovery hole 134 and the bypass hole 136 by the operation of the control means 170.

The second opening and closing means 180 is formed with a gear 181a on one side of the inner side to be engaged with the second gear 173 of the control means 170, and in conjunction with the forward and reverse rotation of the control means 170 A reciprocating transfer member 181 and a bypass valve 183 slidably seated inside the partition 135 to selectively open and close the recovery hole 134 and the bypass hole 136, and It consists of a connection member 182 connecting the transfer member 181 and the bypass valve 183.

Here, the conveying member 181 is a rectangular structure through which the inside is penetrated, and is engaged with the second gear 173 of the control means 170 is inserted therein, at this time one side of the inside to enable the reciprocating motion It is preferable that the gear 181a be formed only.

In addition, the transfer member 181 and the connection member 182 are integrally formed, and the connection member 182 and the bypass valve 183 are detachably coupled.

That is, the coupling groove 182a facing upward is formed at the end of the connection member 182, and the coupling protrusion 183b extending downward of the bypass valve 183 is inserted into the coupling groove 182a. To be combined.

In addition, a pair of elastic members 183a are further provided at an upper end of the bypass valve 183 so that the bypass valve 183 may be in close contact with the inner bottom surface of the partition part 135 by sliding with a constant elastic force. The pressure guide 127 protrudes from the upper inner surface of the first tank 120 so that the elastic member 183a can be uniformly pressed.

Therefore, even if the bypass valve 183 slides to open and close the recovery hole 134 and the bypass hole 136, the leak is always maintained in close contact with the bottom surface of the partition 135 to prevent leakage of the heat exchange medium. Will be done.

Here, the elastic member 183a is a shape protruding from the bypass valve 183 and may be configured in various ways, and the material may be steel, but nylon (to prevent corrosion) Nylon).

In addition, the lower side surface of the bypass valve 183 is coated with various materials such as Teflon material, rubber material to further improve the sealing property.

In the initial opening of the bypass hole 136 by the bypass valve 183, the inside of the first tank 120 may not be rapidly bypassed by too much heat exchange medium through the bypass hole 136. The protrusion 126 is further formed on the side to reduce the cross-sectional area of the upper side of the bypass hole 136.

The protrusion 126 may be formed such that the cross-sectional area of the upper side of the bypass hole 136 is gradually increased as the bypass hole 136 is gradually opened by the bypass valve 183.

As such, the bypass hole 136 may be opened and closed by the bypass valve 183 in correspondence with the position where the slide valve 161 to be described below opens and closes the distribution hole 131 so that only a proper flow rate may be bypassed. To help.

In addition, the first opening and closing means 160 is disposed on both sides of the control means 170 and the gear 162 on each side facing each other to be engaged with the first gear 172 of the control means 170, respectively. Is formed and consists of a pair of slide valve 161 for opening and closing the pair of distribution holes 131 while reciprocating in opposite directions in conjunction with the forward and reverse rotation of the control means 170.

The upper end of the slide valve 161 is further provided with an elastic member 163 so that the slide valve 161 is in close contact with the upper end surface of the second tank 130 with a certain elastic force to slide, the first tank 120 The pressing guide 123 is formed to protrude on the inner surface of the upper end of the upper portion to press the elastic member 163 constantly.

Here, the lower side of the slide valve 161 is coated with a variety of materials such as Teflon material, rubber material so as to further improve the sealing property (161a).

In addition, the elastic member 163 provided on the top of the slide valve 161 is a form protruding from the slide valve 161, the shape can be configured in a variety of ways, such as streamline, the material is steel (Steel) Although it is possible, it is preferable to use nylon in order to prevent corrosion.

8A to 8C, the spring valve 165 is formed in a thin plate shape, and is fixed to the groove 138 formed at the upper end of the second tank 130 by a fitting portion 166. In the sliding operation of the slide valve 161 of the first opening and closing means 160 is made of a valve plate 167 for opening and closing the distribution hole 131 while elastically moving up and down with respect to each of the distribution holes 131.

Here, the distribution holes 131 and the plurality of valve plates 167 corresponding to each other are separated from each other and integrally formed in the fixing part 166 to enable independent opening and closing operations.

Therefore, when the slide valve 161 is slid to close the distribution hole 131, the slide valve 161 passes through the upper side of the spring valve 165, the front end of the slide valve 161 The valve plate 167 is pressed by the closing one by one to close the distribution hole 131 step by step,

When the slide valve 161 is slid in the opposite direction to open the distribution hole 131, the valve plate 167 closed by the slide valve 161 is opened one by one and the distribution hole ( 131) will be opened in stages.

The valve plate 167 is formed to be inclined at a predetermined angle α in the same direction as the sliding direction when the distribution hole 131 of the slide valve 161 is closed.

That is, the valve plate 167 is normally maintained at a predetermined angle in an upward direction of the distribution hole 131 by the elastic force, in which the slide valve 161 to close the distribution hole 131 When sliding the upper side of the spring valve 165 in order to collide with the valve plate 167 of the open state. Therefore, the valve plate 167 in the open state is preferably formed to be inclined at a predetermined angle α in the sliding direction of the slide valve 161 so that the valve plate 167 can be smoothly closed when it comes into contact with the front end of the slide valve 161.

In addition, an elastic protrusion 167a is formed on an upper surface of the valve plate 167 so that the distribution hole 131 of the slide valve 161 is closed with a predetermined elastic force when the distribution hole 131 is closed. That is, in the state in which the valve plate 167 is closed by the slide valve 161, the elastic protrusion 167a is pressed by the lower side of the slide valve 161, and thus the valve plate 167 is moved toward the distribution hole 131. It will be in close contact with a certain elastic force to further improve the sealing property.

In addition, between the fixing part 166 of the spring valve 165 and the valve plate 167, the elastic retaining portion 168 of the curved shape is formed to improve the elastic opening and closing movement of the valve plate 167. do.

On the other hand, the spring valve 165 may be installed in two forms on the top of the second tank 130,

First, as described above, when the plurality of valve plates 167 are integrally formed in the fixing part 166, the groove 138 is formed in the longitudinal direction at the upper edge of the second tank 130, and the groove ( 138) by simply fitting the fixing part 166 can be completed the installation,

Second, although not shown in the drawing, when the plurality of valve plates 167 are each formed separately, grooves (not shown) are formed between the distribution holes 131 at the upper end of the second tank 130. And installation can be completed by fitting the valve plate 167 of a single shape in this groove.

As such, the spring valve 165 may be formed and installed in various forms, but the first method is easy to manufacture and install.

In addition, a guide 137 for reciprocating the slide valve 161 and the transfer member 181 of the second opening / closing means 180 is further formed at an upper end of the second tank 130.

The guide 137 is spaced apart by a predetermined interval to form a pair, the transfer member 181 is located in the center and a pair of slide valves 161 are located on each outside to smoothly reciprocate.

In addition, a partition wall 132 is formed between the tubes 101 so that the pair of distribution holes 131 communicate with each of the tubes 101 independently on the inner surface of the second tank 130. do.

Therefore, in the present invention, the number of distribution holes 131 and the number of tubes 101 are the same.

On the other hand, it is preferable that the rubber 150 is further installed between the upper header 140 and the upper tank 110 to improve the sealing property.

In addition, the rubber 150 and the upper header 140, the tube hole 141, 151 is formed to communicate with each of the tubes 101 and the recovery hole 142 in communication with the return pipe 195 on one side ( 152 are formed, respectively.

In addition, the rubber 150 may be installed between the lower header 190 and the lower tank 191.

In addition, the control means 170 is coupled to the upper end of the upper end of the first tank 120, the lower end is coupled to the support protrusion 133 protruding to the upper end of the second tank 130, the shaft ( 171, a first gear 172 formed at a predetermined height of the shaft 171 and engaged with the gear 162 of the slide valve 161, which is the first opening / closing means 160, and the shaft ( A second gear 173 formed under the first gear 172 of the 171 and engaged with the gear 181a portion of the transfer member 181 which is the second opening / closing means 180, and the first tank 120. Lever 174 is coupled to the upper end of the shaft 171 protruding out of the () to transfer external power to the shaft.

In addition, a sealing member 125 is further installed between the shaft 171 and the first tank 120.

The upper end of the shaft 171 is formed in a polygon so that the rotational force of the lever 174 can be accurately transmitted.

On the other hand, the lever 174 is connected to the motor or actuator (not shown).

As described above, the heat exchanger 100 according to the present invention, when the heat exchange medium is introduced into the inner inlet passage 111 of the upper tank 110 through the inlet pipe 121, the heat exchange medium is the control means 170 By the operation of the slide valve 161 and the bypass valve 183 in accordance with the opening and closing operation of the bypass pipe 122 directly through the bypass hole 136, or through the plurality of distribution holes 131 After the heat exchange with the outside air while flowing along the tube 101 is returned through the return pipe 195 is discharged to the outlet pipe 122.

Hereinafter, the circulation process of the heat exchange medium will be described in more detail.

When the lever 174 is rotated at a specific angle through a control switch (not shown) while the heat exchange medium is circulated, the first and second gears 172 and 173 rotate together with the rotation of the shaft 171. The slide valve 161 and the bypass valve 183 are slid.

At this time, according to the positions of the slide valve 161 and the bypass valve 183, the circulation path of the heat exchange medium and the amount of heat exchange medium supplied to each tube 101 are changed.

For convenience, the slide valve 161 completely closes the distribution hole 131, the slide valve 161 opens all the distribution holes 131, and the slide valve 161 opens the distribution hole. Only the case of opening part of 131 will be described.

First, when the slide valve 161 completely closes the distribution hole 131 (see FIG. 9A), the heat exchange medium circulation process is as follows.

When the slide valve 161 slides by the operation of the control means 170 by the lever 174 to close the valve plate 167 of the spring valve 165 to close all the distribution holes 131, the bypass The pass valve 183 completely opens the bypass hole 136 and the recovery hole 134 is completely closed.

Therefore, the heat exchange medium flowing into the inner inlet passage 111 of the upper tank 110 through the inlet pipe 121 is immediately bypassed to the outlet passage 112 through the bypass hole 136 and then the outlet pipe ( 122).

Second, the heat exchange medium circulation process when the slide valve 161 has fully opened the distribution hole 131 (see FIG. 9B) is as follows.

By opening the valve plate 167 of the spring valve 165 while sliding the slide valve 161 by the operation of the control means 170 by the lever 174 to open all the distribution holes 131, the bypass The valve 183 completely closes the bypass hole 136 and the recovery hole 134 is fully open.

Therefore, the heat exchange medium flowing into the inner inlet passage 111 of the upper tank 110 through the inlet pipe 121 is supplied to all the open distribution holes 131 to independently communicate the entire tubes 101. After performing active heat exchange with the outside air while flowing along, it is moved to the lower tank 191.

The heat exchange medium moved to the lower tank 191 is returned through the return pipe 195 and moved to the outlet passage 112 side of the upper tank 110 through the open recovery hole 134 and then the outlet pipe 122. Is discharged.

Third, the heat exchange medium circulation process when the slide valve 161 opens only a part of the distribution hole 131 (see FIG. 9C) is as follows.

As the slide valve 161 slides due to the operation of the control means 170 by the lever 174, only the valve plate 167 of the valve plate 167 of the spring valve 165 is opened to open the distribution hole 131. When only a part of the bypass valve 183 is opened, the bypass valve 183 is positioned between the bypass hole 136 and the recovery hole 134 to partially open the bypass hole 136 and partially open the recovery hole 134.

Therefore, some of the heat exchange medium flowing into the inner inlet passage 111 of the upper tank 110 through the inlet pipe 121 is supplied to the open distribution hole 131, but the remaining heat exchange medium is partially opened. After being bypassed directly to the outlet passage 112 through the bypass hole 136 is discharged to the outlet pipe 122.

Subsequently, the heat exchange medium supplied to the partially opened distribution holes 131 flows along some of the tubes 101 communicating with the open distribution holes 131 and performs active heat exchange with the outside air, and then the lower tank ( 191).

The heat exchange medium moved to the lower tank 191 returns through the return pipe 195 and moves to the outlet passage 112 side of the upper tank 110 through the partially opened recovery hole 134 and then the outlet pipe 122. To be discharged.

That is, the more the distribution hole 131 is opened by the slide valve 161, the bypass valve 183 gradually closes the bypass hole 136 to bypass the flow rate through the bypass hole 136. On the contrary, as the distribution hole 131 is opened less, the bypass valve 183 gradually opens the bypass hole 136 to increase the flow rate that is bypassed through the bypass hole 136.

In this way, the flow passage cross-sectional area of the bypass hole 136 is variable in correspondence with the position of the slide valve 161 so that only a proper flow rate can be bypassed.

As described above, according to the present invention, the sealing surface is improved by providing a spring valve having a plurality of valve plates between the distribution hole and the slide valve to prevent leakage, and the slide valve slides the upper side of the spring valve so that the friction surface This minimizes the operating force of the slide valve and thus increases its durability.

Claims (6)

A plurality of tubes 101 fixed at both ends of the upper and lower headers 140 and 190 and arranged at regular intervals; It is coupled to the upper header 140 and built in the first tank 120 and the first tank 120 having the inlet and outlet pipes 121 and 122 formed on one side thereof, and are arranged to be offset from each other with a predetermined interval on the upper end. An upper tank 110 formed of a second tank 130 in which a pair of plurality of distribution holes 131 are formed and a recovery hole 134 is formed at one side thereof; First opening / closing means (160) installed slidably in the upper tank (110) to open and close the pair of distribution holes (131); A spring valve 165 is installed between the first opening and closing means 160 and the distribution hole 131 to improve sealing property and elastically opens and closes the distribution hole 131 during the sliding operation of the first opening and closing means 160. ); A control means (170) rotatably installed in the upper tank (110) to receive external power to operate the first opening / closing means (160); A lower tank 191 coupled to the lower header 190 and in communication with an end of each tube 101 and in communication with the upper tank 110 through a return pipe 195. Heat exchanger characterized in that consisting of. The method of claim 1, The first opening and closing means 160 are respectively disposed on both sides of the control means 170 and the gear 162 is formed on one side so as to be engaged with the control means 170, respectively, and the control means 170, And a pair of slide valves (161) for opening and closing the pair of distribution holes (131) while reciprocating in opposite directions in conjunction with reverse rotation. The method of claim 1, The spring valve 165 is formed in a thin plate shape fixed portion 166 is fitted to the upper end of the second tank 130, and each distribution hole 131 during the sliding operation of the first opening and closing means (160). Heat exchanger, characterized in that consisting of a valve plate 167 opening and closing the distribution hole 131 while elastically moving in the up and down direction. The method of claim 3, wherein The valve plate (167) is a heat exchanger, characterized in that formed at a predetermined angle (α) inclined in the same direction as the sliding direction when the distribution hole (131) of the first opening and closing means (160). The method of claim 3, wherein The valve plate 167 is characterized in that the elastic protrusion 167a is formed on the upper surface so that the distribution hole 131 closes the distribution hole 131 of the first opening and closing means 160 to be in close contact with a predetermined elastic force. Heat exchanger made. The method of claim 3, wherein Heat exchanger, characterized in that between the fixing portion 166 and the valve plate 167 is formed a curved elasticity holding portion 168 to improve the elastic movement of the valve plate (167).

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