CN114811168A

CN114811168A - Proportional control valve for cooling and heating

Info

Publication number: CN114811168A
Application number: CN202110089187.7A
Authority: CN
Inventors: 朴熙完
Original assignee: Corea Electronics Corp
Current assignee: Corea Electronics Corp
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2022-07-29

Abstract

A flow control valve for cooling and heating according to an embodiment of the present invention includes: a housing having an inlet through which a fluid flows in and an outlet through which the fluid flows out, and a partition wall in which a first flow hole is formed; a first valve unit for controlling the flow rate of the fluid flowing into the first flow hole according to a set temperature; and a second valve unit for controlling the flow rate of the fluid flowing through the first flow hole according to the set temperature.

Description

Proportional control valve for cooling and heating

Technical Field

The present invention relates to a flow control valve for cooling and heating used in a heat exchange device in which a fluid for cooling and heating flows.

Background

In general, a heating unit such as a fan coil unit, a chilled beam, etc., used as a cooling and heating system in an apartment, an office, or a commercial space, has a hot or cold water inflow pipe and a recovery port through which inflow hot or cold water is discharged through a radiator of the fan coil unit, and in some cases, a valve controlling a flow rate may or may not be provided on the recovery port. If there is a valve for adjusting the flow rate, the valve is automatically operated according to the indoor temperature setting to adjust the flow rate of the flowing heat medium. A valve used in a conventional fan coil or the like is a valve for controlling a flow rate of a heat medium from a recovery port, and lacks a function of supplying cold water or hot water to absorb heat as much as possible and return to a set high temperature during cooling and to emit heat as much as possible and return to a set low temperature during heating to achieve maximum heat efficiency.

As a prior art for solving the above problems, there is a smart heating valve (SMART HEATING VALVE) of korean patent No. 10-1491044.

However, the above patent is limited in that the valve performs only an automatic flow rate adjusting function for heating that senses a temperature rise of the heating warm water to reduce a flow rate at the time of heating, that is, performs only a proportional control function according to the temperature rise, and thus can be used only for heating.

As another example, there is a valve that performs a function of sensing an indoor air temperature using a room controller provided indoors, increasing a valve flow rate when a temperature difference is large, and gradually decreasing the valve flow rate when the temperature difference is small, by using a difference between a set temperature and an actual temperature, but there is a problem of low efficiency because the temperature of a heat medium at an outlet of a fan coil unit cannot be directly sensed and controlled in real time.

(Prior art document)

(patent document)

Korean granted patent No. 10-1491044

Disclosure of Invention

Technical problem

The present invention has been made to solve the above problems, and an object of the present invention is to provide a flow control valve for cooling and heating, which has a simple structure and can perform an integrated function of controlling a ratio of a fluid during cooling and heating.

The problems to be solved by the present invention are not limited to the above-mentioned ones, and other problems not mentioned in the present invention will be clearly understood by those skilled in the art from the following description and the accompanying drawings.

Means for solving the problems

In order to solve the above problems, a flow control valve for cooling and heating according to the present invention includes: a housing having an inlet through which a fluid flows in and an outlet through which the fluid flows out, and a partition wall in which a first flow hole is formed; a first valve unit for controlling the flow rate of the fluid flowing into the first flow hole according to a set temperature; and a second valve unit for controlling the flow rate of the fluid flowing through the first flow hole according to the set temperature.

The first valve unit may reduce the flow rate of the fluid at a temperature equal to or higher than a set temperature during heating, and the second valve unit may reduce the flow rate of the fluid at a temperature equal to or lower than the set temperature during cooling.

The first valve unit may include a first cylinder having wax expanded according to a set temperature during heating, the second valve unit may include a second cylinder having wax expanded according to a set temperature during cooling, and the first and second cylinders may be disposed in opposite directions with respect to a moving direction of the fluid.

The first valve unit may include: a first thermally actuated valve guide formed with a second flow hole and a third flow hole through which fluid flows; a first thermally actuated valve including a first cylinder filled with wax therein and selectively shielding the third flow hole according to expansion movement of the wax, and a first piston having one end movably inserted into the first cylinder; and a first elastic part provided in the first thermally actuated valve and applying a restoring force to the cylinder.

The second valve unit may include: a valve housing provided at least one of the inlet port and the outlet port and having a flow path through which a fluid flows; a second thermally actuated valve guide having a fourth flow hole, a fifth flow hole, and a second fixing portion, through which the fluid flowing through the valve housing flows; a second thermally actuated valve including a second piston and a second cylinder, one end of the second piston being located at the fixed portion, the second cylinder being inserted with the other end of the second piston in a movable manner, the second cylinder being filled with wax; a guide member provided in the valve housing, the guide member having a sixth flow hole through which a fluid flows and a through hole through which the other end of the second cylinder is inserted; and an elastic part which is arranged on the thermal actuating valve and applies restoring force to the cylinder.

ADVANTAGEOUS EFFECTS OF INVENTION

The flow control valve according to an embodiment of the present invention has the following effects.

First, there is an advantage in that the flow amount can be simply adjusted at the time of cooling and heating by a simple housing structure and an effective arrangement of two valve units.

Secondly, there is an advantage in that the entire flow control valve is configured in a single module, and thus is easily installed and separated in a pipe.

Thirdly, there is an advantage in that each valve unit can be individually separated, and thus it is easy to replace any one valve unit, etc.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned in the present invention will be clearly understood by those skilled in the art from the following description and the accompanying drawings.

Drawings

Fig. 1 is a perspective view of a flow control valve according to a first embodiment of the present invention.

Fig. 2 is a view showing a section of the housing of the first embodiment of the present invention.

Fig. 3 is an exploded perspective view of a flow control valve for cooling and heating according to a first embodiment of the present invention.

Fig. 4 is an exploded perspective view of main components of the first valve unit of the first embodiment of the present invention.

Fig. 5 is a perspective view of a first valve unit of the first embodiment of the present invention at a low temperature.

Fig. 6 is a perspective view of the first valve unit of the first embodiment of the present invention at a high temperature.

Fig. 7 is an exploded perspective view of the main components of the second valve unit of the first embodiment of the present invention.

Fig. 8 is a perspective view of the second valve unit of the first embodiment of the present invention at a low temperature.

Fig. 9 is a perspective view of the second valve unit of the first embodiment of the present invention at a high temperature.

Fig. 10 is a sectional view showing the flow of a high-temperature fluid at the time of cooling of the flow control valve for cooling and heating according to the first embodiment of the present invention.

Fig. 11 is a sectional view showing the flow of the cryogenic fluid at the time of cooling of the flow control valve for cooling and heating according to the first embodiment of the present invention.

Fig. 12 is a sectional view showing the flow of the cryogenic fluid at the time of heating of the flow control valve for cooling and heating according to the first embodiment of the present invention.

Fig. 13 is a sectional view showing the flow of a high-temperature fluid when the flow control valve for cooling and heating of the first embodiment of the present invention heats.

Fig. 14 is a graph for explaining the flow rate according to the temperature of the fluid when the flow control valve for cooling and heating according to the first embodiment of the present invention is used.

Fig. 15 is a view showing a state in which a flow control valve for cooling and heating of the first embodiment of the present invention is disposed at a water outlet side of a heat exchanger.

Fig. 16 is a perspective view of a flow control valve for cooling and heating according to a second embodiment of the present invention.

Fig. 17 is an exploded perspective view of a flow control valve for cooling and heating according to a second embodiment of the present invention.

Fig. 18 is a sectional view showing the flow of a high-temperature fluid at the time of cooling of the flow control valve for cooling and heating according to the second embodiment of the present invention.

Fig. 19 is a sectional view showing the flow of the cryogenic fluid at the time of cooling of the flow control valve for cooling and heating according to the second embodiment of the present invention.

Fig. 20 is a sectional view showing the flow of the cryogenic fluid at the time of heating of the flow control valve for cooling and heating according to the second embodiment of the present invention.

Fig. 21 is a sectional view showing the flow of a high-temperature fluid at the time of heating of the flow control valve for cooling and heating according to the second embodiment of the present invention.

Reference numerals

110: outer casing

113 partition wall

114 first flow hole

120 first valve unit

121: valve cover

123 first thermally actuated valve

First thermally actuated valve guide 124

125 first elastic part

130 second valve unit

131: valve casing

132 second thermally actuated valve guide

133 second thermally actuated valve

134 guide member

135 second elastic part

140 third valve unit

Detailed Description

Specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Although many other varied embodiments that incorporate the teachings of the present invention may be readily devised by those skilled in the art through the addition, modification or deletion of elements, such embodiments would fall within the scope of the present invention.

First embodiment

Fig. 1 is a perspective view of a flow control valve according to a first embodiment of the present invention, and fig. 2 is a view showing a cross section of a housing according to the first embodiment of the present invention.

Referring to fig. 1 and 2, the flow control valve 100 of the present embodiment includes a housing 110, a first valve unit 120, a second valve unit 130, and a third valve unit 140.

An inlet 111 through which a fluid flows in and an outlet 112 through which the fluid flows out are formed in the housing 110. In addition, a partition wall 113 that divides the space inside the case into a first space S1 and a second space S2 is formed inside the case 110, and a first flow hole 114 is formed in the partition wall 113.

The partition wall 113 may be formed in various shapes to divide the space inside the case 110 into the first space S1 and the second space S2. In the present embodiment, since the opening and closing part 141 of the third valve unit 140 moves up and down to shield the first flow hole 114, a portion of the partition wall 113 may be formed to have a horizontal plane. Also, the first flow hole 114 is formed in a horizontal plane.

A first coupling hole 115 and a second coupling hole 116 are formed at the outer case 110, the first coupling hole 115 being shielded when the first valve unit 120 is coupled with the outer case 110, and the second coupling hole 116 being shielded when the third valve unit 140 is coupled with the outer case 110.

The third valve unit 140 is an assembly that opens and closes the first flow hole 114. The third valve unit 140 may be various types of valves that open and close the first flow hole 114. Specifically, the third valve unit 140 in the present embodiment includes the opening and closing part 141 shielding the first flow hole 114 by moving up and down, and a power source for driving the opening and closing part 141 is not limited.

Fig. 3 is an exploded perspective view of a flow control valve for cooling and heating according to a first embodiment of the present invention, fig. 4 is an exploded perspective view of main components of a first valve unit according to the first embodiment of the present invention, fig. 5 is a perspective view of the first valve unit according to the first embodiment of the present invention at a low temperature, and fig. 6 is a perspective view of the first valve unit according to the first embodiment of the present invention at a high temperature.

Referring to fig. 3 to 6, the first valve unit 120 is coupled to the first coupling hole 115 of the housing 110 to control the flow rate of the fluid flowing through the first flow hole 114.

Specifically, the first valve unit 120 includes a bonnet 121, a first thermally actuated valve 123, a first thermally actuated valve guide 124, and a first elastic portion 125.

The valve cover 121 is coupled to the first coupling hole 115 to perform a function of shielding the first coupling hole. Also, the valve cap 121 performs a function of supporting the other end of the first piston 123a of the first thermally actuated valve 123, and in the present embodiment, a groove 121a into which the other end of the first piston 123a is inserted is formed.

The first thermally actuated valve 123 comprises a first piston 123a and a first cylinder 123 b.

One end of the first piston 123a is inserted and fixed into a groove 121a formed at the valve cap 121.

Wax is filled in the inside of the first cylinder 123 b. Also, an insertion hole is formed at one end of the first cylinder 123b for movably inserting one end of the first piston 123 a. On the other hand, the other end of the first piston 123a is fixed in the groove 121a of the valve cover 121, so that the cylinder 123b relatively moves according to the volume change of the wax according to the temperature.

Further, the other end of the first cylinder 123b is formed to have a size that can be inserted into a second flow hole 124a, which will be described below. Accordingly, when the temperature of the fluid flowing through the outer periphery of the first cylinder 123b is high, the wax is expanded, so that the first cylinder 123b is inserted into the second flow hole 124a to shield at least a portion of the second flow hole 124 a. Also, when the temperature of the fluid flowing through the outer periphery of the first cylinder 123b is low, the wax is contracted, so that the first cylinder 123b is returned to the original position by the first elastic part 125 to open the second flow hole 124 a.

On the other hand, the first cylinder 123b may be formed with various types of fixing portions that contact one end of the elastic portion 125 that provides a restoring force to the first cylinder. In the present embodiment, a first protrusion 123c having an outer diameter larger than that of the first cylinder 123b is formed so as to contact one end of the first elastic part 125.

As a result, the first thermally actuated valve 123 performs the function of selectively shielding the second flow hole 124a according to the temperature of the flowing fluid.

A first flow hole 114, a second flow hole 124a into which the other end of the first cylinder 123b is inserted to regulate the flow of fluid, and a third flow hole 124b through which the fluid flows 124b are formed in the first thermally actuated valve guide 124. Therefore, as shown above, the flow amount of the fluid passing through the first thermally actuated valve guide 124 may vary according to the temperature of the flowing fluid.

In the present invention, the form in which the third flow hole 124b, which is always open, and the second flow hole 124a, which is opened or closed according to the movement of the first cylinder 123b, are formed, is not limited.

The first thermally actuated valve guide 124 in the present embodiment includes a body portion 124c, a dividing portion 124d, and a connecting portion 124 e.

The main body portion 124c is formed in a ring shape, and the partition portion 124d is formed in a ring shape having a size smaller than that of the main body portion 124 c. In addition, since the partition 124d is positioned inside the body part 124c, the partition 124d divides the inside of the body part 124c into the second flow hole 124a and the third flow hole 124 b. Specifically, the inner space of the partition 124d is defined as the second flow hole 124a, and the space between the body portion 124c and the partition 124d is defined as the third flow hole 124 b.

The connecting portion 124e connects the main body portion 124c and the partition portion 124d to fix the partition portion 124d inside the main body portion 124 c. Also, the plurality of connection parts 124e are radially arranged to be able to divide the third flow holes 124b into a plurality again.

The first elastic part 125 is provided at the first thermally actuated valve 123 to provide a restoring force to the first cylinder 123 b. In the present invention, the shape and type of the first elastic part are not limited as long as elasticity can be provided to the moving direction of the first cylinder 123b when the temperature of the fluid is high.

In the present embodiment, a coil spring having a shape surrounding the outer circumferential surface of the first cylinder 123b is used. And, the first elastic part 125 is disposed between the protrusion part 123c of the first thermally actuated valve and the upper face of the partition part 124d of the first thermally actuated valve guide to provide a restoring force to the first thermally actuated valve 123.

Fig. 3 is an exploded perspective view of a flow control valve for cooling and heating according to a first embodiment of the present invention, fig. 7 is an exploded perspective view of main components of a second valve unit according to the first embodiment of the present invention, fig. 8 is a perspective view of the second valve unit according to the first embodiment of the present invention at a low temperature, and fig. 9 is a perspective view of the second valve unit according to the first embodiment of the present invention at a high temperature.

Referring to fig. 3, 7 to 9, the second valve unit 130 of the present embodiment includes a valve housing 131, a second thermally actuated valve guide 132, a second thermally actuated valve 133, a guide member 134, and an elastic part 135.

The valve housing 131 is formed with a flow path through which a fluid flows, and may be provided at least one of the inlet 111 and the outlet 112 of the housing 110. That is, the valve housing 131 may be provided at the inflow port 111 and the outflow port 112, or may be provided only at the outflow port 112, and in the present embodiment, description will be made with reference to the case where it is provided at the inflow port 111.

A fourth flow hole 132c and a fifth flow hole 132d through which the fluid flowing through the valve housing 131 flows are formed at the second thermally actuated valve guide 132. The fourth flow hole 132c is selectively shielded by a second cylinder 133b, which will be described below, and the fluid always flows through the fifth flow hole 132 c. The flow rate of the fluid flowing through the second thermally actuated valve guide 132 is thus adjusted according to the movement of the second cylinder 133b based on the temperature.

As described above, the fourth and fifth flow holes 132c and 132d may take various forms capable of adjusting the flow rate according to the movement of the second cylinder 133 b. In the present embodiment, the fourth flow hole 132c is formed to have a size corresponding to the protrusion 133c of the second cylinder 133 b. Also, a fifth flow hole 132d is formed in at least a portion of the outer circumferential surface outside of the fourth flow hole 132c to communicate with the fourth flow hole 132 c. Therefore, the fourth flow hole 132c is selectively shielded with the movement of the second cylinder 133b, and the fifth flow hole 132d always maintains an open state.

A fixing portion 132a where one end of the second piston 133a is located is provided at the center of the fourth flow hole 132c, and a plurality of ribs 132b connect the fixing portion 132a and the fourth flow hole 132 c. In the present embodiment, as shown, three ribs 132b are provided to divide the fourth flow hole 132c into three.

The second thermally actuated valve 133 includes a second piston 133a, a second cylinder 133b, and a second protrusion 133c, like the first thermally actuated valve 123 described above, and since the whole structure of both is the same, the description will be omitted below.

However, the second thermally actuated valve 133 is disposed in an opposite direction to the first thermally actuated valve 123 based on the direction of fluid flow. Therefore, in the first thermally actuated valve 123, the first cylinder 123b moves in the direction of the flow of the fluid due to the expansion of the wax inside the first cylinder 123b, thereby reducing the amount of the flow of the fluid. On the other hand, in the second thermally actuated valve 133, due to the expansion of the wax inside the second cylinder 133b, the second cylinder 133b moves in the direction opposite to the flow direction of the fluid, thereby increasing the flow amount of the fluid. The physical properties of the wax inside the associated first and

second cylinders

123, 133 and the specific contents of the flow direction of each thermally actuated valve will be described in detail below.

One end of the second piston 133a of the second thermally actuated valve 133 in this embodiment is located at the fixing portion 132a of the second thermally actuated valve guide 132, and the second cylinder 133b is movably coupled to the other end of the second piston 133 a. The second protrusion 133c selectively shields the fourth flow hole 132c of the second thermal actuating valve guide 132 according to the movement of the second cylinder 133b, while the other end of the second protrusion 133c supports the second elastic part 135.

In addition, the other end of the second cylinder 133b is inserted into the through hole 134b of the guide member 134 to stably support the entire second thermally actuated valve 133.

The guide member 134 is a component provided at the valve housing 131 to stably support the second thermally actuated valve 133. Therefore, in order to stably support the moving second cylinder 133b, a through hole 134b into which the other end of the second cylinder 133b is inserted is formed, and a sixth flow hole 134c through which a fluid flows along the periphery of the through hole 134b is also formed.

The sixth flow hole 134c may be formed in various forms, but in the present embodiment, the guide member 134 is formed to have a size smaller than the inner diameter of the valve housing 131, and has three ribs 134a, the three ribs 134a being formed at the outer side of the guide member 134 to be in contact with the inner diameter of the valve housing 131, and three sixth flow holes 134c are formed between the outer side of the guide member 134 and the inner diameter of the valve housing 131 by the three ribs 134 a.

The second elastic part 135 is provided at the second thermally actuated valve 133 to provide a restoring force to the second cylinder 133 b. In the present invention, the shape and type of the second elastic part are not limited as long as elasticity can be provided in the direction opposite to the moving direction of the second cylinder 133b when the temperature of the fluid is high.

In the present embodiment, a coil spring having a shape surrounding the outer circumferential surface of the second cylinder 133b is used. And, the second elastic part 135 is disposed between the protrusion 133c of the second thermally actuated valve and the guide member 134 to provide a restoring force to the second thermally actuated valve 133.

On the basis of the assembly of the first embodiment of the present invention as described above, the operation of the first and

second valve units

120 and 130 according to the temperature change of the fluid and the flow of the fluid according thereto will be described.

As described above, the wax expanded at a certain temperature is provided inside the first cylinder 123b of the first valve unit 120 and the second cylinder 133b of the second valve unit 130, and the flow rate of the fluid flowing therethrough is adjusted according to the expansion of the wax.

In particular, as shown in fig. 15, when the flow control valve for cooling and heating according to the present invention is provided in the outflow part 2 of a heat exchanger for cooling and heating such as a fan coil unit, the flow rate is automatically controlled according to the temperature of the fluid flowing in through the inflow part 1 and heat-exchanged and then flowing out through the outflow part 2, so that the heat exchange efficiency of the entire system can be improved.

Specifically, when the leaving water temperature at the time of cooling is excessively low, an operation of reducing the flow rate of the fluid for cooling is performed due to overcooling. In addition, when the outlet water temperature is too high during heating, an operation of reducing the fluid flow rate is performed due to the excessive heating.

That is, various types of wax may be used in the first cylinder 123b and the second cylinder 133b, but in the present embodiment, the description will be made with reference to a case where the wax in the first cylinder 123b adjusts the fluid flow rate during heating and the wax in the second cylinder 133b adjusts the fluid flow rate during cooling.

Referring to fig. 10, wax that expands at a specific temperature (e.g., 50 to 60 degrees) when heating is selected in the first valve unit 120. Also, wax that expands at a specific temperature (e.g., 12 to 17 degrees) during refrigeration is selected for the second valve unit 130. Hereinafter, a case where the set temperature during heating is in the range of 50 degrees to 60 degrees and the set temperature during cooling is in the range of 12 degrees to 17 degrees will be described as a reference.

Therefore, when the temperature of the discharged fluid becomes equal to or greater than the set temperature at the time of cooling, the wax inside the first cylinder 123b is in a contracted state. Therefore, the first cylinder 123b is in a state of moving downward without shielding the second flow hole 124a of the first thermally actuated valve guide 124. That is, the fluid flows into the first flow hole 114 through the second flow hole 124a and the third flow hole 124 b.

On the other hand, the wax inside the first cylinder 123b expands at a set temperature at the time of heating, and thus the first valve unit 120 maintains an open state during the flow of the fluid for cooling so that the fluid flows through the second and

third flow holes

124a and 124 b.

When the temperature of the fluid discharged at the time of refrigeration becomes equal to or greater than the set temperature, the wax provided in the second valve unit 130 expands. That is, the second cylinder 133b opens the fourth flow hole 132c of the second thermally actuated valve guide 132 while moving to the right side. Accordingly, the fluid flows through the fourth and fifth flow holes 132c and 132 d.

That is, when the temperature of the fluid for cooling is equal to or greater than the set temperature, since the heat supplied by the inflowing fluid for cooling is insufficient, a larger amount of fluid than before is supplied through the fourth and fifth flow holes 132c and 132 d.

Referring to fig. 11, when the temperature of the fluid is equal to or less than the set temperature at the time of cooling, the wax of the first cylinder 123b of the first valve unit 120 is in a contracted state, and the second flow hole 124a of the first thermally actuated valve guide 124 is in an open state. Accordingly, the fluid flows through the second flow holes 124a and the third flow holes 124 b.

The wax of the second cylinder 133b of the second valve unit 130 also shrinks and the second cylinder 133b shields the fourth flow hole 132 c. Therefore, the fluid flows through only the fifth flow hole 132 d.

That is, when the temperature of the fluid for cooling is equal to or less than the set temperature, the inflow fluid is supplied with sufficient heat for cooling, and thus a smaller amount of fluid than before is supplied through the fifth flow hole 132 d.

In summary, when the fluid for cooling flows, the second flow hole 124a and the third flow hole 124b are always opened in the first valve unit 120, so that a constant flow rate flows. In addition, when the fluid supplies sufficient heat required for refrigeration, the second valve unit 130 opens only the fifth flow hole 132d to reduce the flow rate of the fluid. And, when the fluid cannot supply enough heat required for cooling, a larger amount of fluid flows by opening the fourth and fifth flow holes 132c and 132 d.

Referring to fig. 12, when the temperature of the fluid is equal to or less than the set temperature at the time of heating, the wax of the first cylinder 123b of the first valve unit 120 is in a contracted state, and the second flow hole 124a of the first thermally actuated valve guide 124 is in an open state. Thus, the fluid flows through the second flow holes 124a and the third flow holes 124 b.

The wax provided in the second valve unit 130 is in an expanded state. That is, the second cylinder 133b is in a state of having moved to the right side, and the fourth flow hole 132c of the second thermally actuated valve guide 132 is in an open state. Accordingly, the fluid flows through the fourth and fifth flow holes 132c and 132 d.

On the other hand, when hot water for heating flows in, wax inside the second cylinder 133b expands, and the second valve unit 130 maintains an open state, so that the fluid flows through the fourth and fifth flow holes 132c and 132 d.

That is, when the temperature of the fluid supplied for heating is equal to or lower than the set temperature, it is determined that the fluid flowing in is supplied with sufficient heat for heating and then recovered.

Referring to fig. 13, when the temperature of the fluid is equal to or greater than the set temperature at the time of heating, the wax of the first cylinder 123b of the first valve unit 120 expands. Therefore, the first cylinder 123b shields the second flow hole 124a while moving upward. Accordingly, the fluid flows through the third flow hole 124b, and the flow rate of the fluid is reduced.

On the other hand, at this time, the second valve unit 130 maintains an open state, and the fluid flows through the fourth flow hole 132c and the fifth flow hole 132 d.

That is, when the temperature of the fluid supplied for heating is equal to or greater than the set temperature, it is determined that the amount of heat for heating being supplied by the fluid flowing in is excessive, and the flow rate of the fluid flowing through the first valve unit 120 is reduced.

In summary, when the fluid for heating flows, the fourth and fifth flow holes 132c and 132d are always opened in the second valve unit 130, so that a constant flow rate flows. In addition, when the fluid supplies an appropriate amount of heat required for heating, both the first valve unit 120 and the second valve unit 130 are opened to supply an appropriate flow rate. However, when the temperature of the fluid is equal to or greater than the set temperature for heating, it is determined that the amount of heat supplied for heating is excessive, so that the flow rate of the fluid is reduced by opening only the third flow hole 124 b.

For convenience of explanation, the case where the set temperature during heating is in the range of 50 to 60 degrees and the set temperature during cooling is in the range of 12 to 17 degrees will be described as a reference, but the above temperature range may be changed depending on the choice of wax.

A case will be described where, when the first valve unit 120 and the second valve unit 130 are partially closed, the flow rate is reduced by 70%, and a fluid of 30% flow rate flows. However, it may also be modified by modifying the specific size of each component. For example, in the above description, it has been described that the first cylinder 123b shields the second flow hole 124a, but may be implemented in a form of reducing the flow rate by shielding a portion of the second flow hole 124a according to the sizes of both and the moving distance based on wax expansion, etc. And, this may be equally applied to the relationship between the second cylinder 133b and the fourth flow hole 132 c.

Referring to fig. 14, during cooling, a cold fluid flows to cool the space. As the cold fluid flows, heat in the space is recovered, and the fluid with an increased temperature is discharged through a flow regulating valve for cooling and heating.

At this time, when the temperature of the recovered liquid is 17 ℃ or more, the flow rate of 100% is maintained, but when the temperature of the recovered liquid is 17 ℃ or less, an excessive amount of fluid is supplied for the refrigeration of the space.

Therefore, at this time, the wax of the second valve unit 130 starts to shrink, and when the temperature of the fluid reaches 12 degrees, the wax finishes shrinking, so that the second cylinder 133b moves to the left in the drawing through the second elastic part 135 to shield the fourth flow hole 132 c.

Therefore, when the temperature of the fluid is 12 degrees or less, 70% of the maximum flow rate is reduced, so that 30% of the flow rate of the fluid flows.

In addition, the temperature of the recovered fluid rises above 12 degrees when sufficient heat required for cooling cannot be supplied to the space during the reduced fluid flow. Accordingly, the wax of the second valve unit 130 starts to expand, and the flow rate of the fluid increases again. Thus, a sufficient flow of fluid required for refrigeration is supplied to the space.

On the other hand, in heating, a hot fluid is supplied for heating the space. The thermal fluid supplies heat to the space, and in a state where the temperature is lowered, the fluid flows into the cooling and heating flow rate adjusting valves.

At this time, when the temperature of the recovered liquid is 50 ℃ or lower, the flow rate is maintained at 100%, but when the temperature of the recovered liquid is 50 ℃ or higher, an excessive amount of fluid is supplied for heating the space.

Therefore, at this time, the wax of the first valve unit 120 starts to expand, and when the temperature of the fluid reaches 60 degrees, the wax ends to expand. As the wax expands, the first cylinder 123b moves upward to shield the second flow hole 124 a.

Therefore, when the temperature of the fluid is equal to or greater than 60 degrees, 70% of the maximum flow rate is reduced, so that 30% of the flow rate of the fluid flows.

In addition, when sufficient heat required for heating cannot be supplied to the space during the process of the reduced fluid flow, the temperature of the recovered fluid is reduced to 60 degrees or less. Accordingly, the wax of the first valve unit 120 starts to shrink and the flow rate of the fluid increases again. Thus, a sufficient flow rate of fluid required for heating flows again in the space.

That is, when the flow control valve for cooling and heating of the present invention is provided at the water outlet side of a heat exchanger or the like, it is possible to automatically supply a fluid of an appropriate flow rate suitable for cooling and heating according to the temperature even without a separate electronic control, so that it is possible to achieve efficient source management of the entire heat exchange system.

Fig. 16 to 21 are views showing a flow control valve for cooling and heating according to a second embodiment of the present invention. Referring to fig. 16 to 21, the third valve unit 140 is not provided at the flow control valve for cooling and heating of the second embodiment of the present invention. Accordingly, the same as the first embodiment explained above except that the second coupling hole 116 of the first embodiment is not formed at the outer case 110, and thus the description thereof will be omitted.

Claims

1. A flow control valve for cooling and heating, comprising:

a housing having an inlet through which a fluid flows in and an outlet through which the fluid flows out, and a partition wall in which a first flow hole is formed;

a first valve unit for controlling the flow rate of the fluid flowing into the first flow hole according to a set temperature; and

and a second valve unit for controlling the flow rate of the fluid flowing through the first flow hole according to the set temperature.

2. A flow control valve for cooling and heating according to claim 1, wherein the first valve unit reduces the flow rate of the fluid at a temperature higher than a set temperature during heating,

the second valve unit reduces the flow rate of the fluid at a temperature equal to or lower than a set temperature during cooling.

3. The flow control valve for cooling and heating according to claim 2, wherein the first valve unit includes a first cylinder having wax expanded according to a set temperature while heating provided therein,

the second valve unit includes a second cylinder having wax expanded according to a set temperature during cooling,

the first cylinder and the second cylinder are arranged in opposite directions with reference to a moving direction of the fluid.

4. The flow control valve for cooling and heating according to claim 1, wherein the first valve unit comprises:

a first thermally actuated valve guide formed with a second flow hole and a third flow hole through which fluid flows;

a first thermally actuated valve including a first cylinder filled with wax therein and selectively shielding the third flow hole according to expansion movement of the wax, and a first piston having one end movably inserted into the first cylinder; and

and a first elastic part provided in the first thermally actuated valve and applying a restoring force to the cylinder.

5. A flow control valve for cooling and heating according to claim 1, wherein said second valve unit comprises:

a valve housing provided at least one of the inlet port and the outlet port and having a flow path through which a fluid flows;

a second thermally actuated valve guide having a fourth flow hole, a fifth flow hole, and a second fixing portion, through which the fluid flowing through the valve housing flows;

a second thermally actuated valve including a second piston and a second cylinder, one end of the second piston being located at the fixed portion, the second cylinder being inserted with the other end of the second piston in a movable manner, the second cylinder being filled with wax;

a guide member provided in the valve housing, the guide member having a sixth flow hole through which a fluid flows and a through hole through which the other end of the second cylinder is inserted; and

and an elastic part provided in the thermally actuated valve and applying a restoring force to the cylinder.