WO2020022837A1

WO2020022837A1 - Refrigerant stabilization system and control method therefor

Info

Publication number: WO2020022837A1
Application number: PCT/KR2019/009335
Authority: WO
Inventors: 김동호; 이근식
Original assignee: 주식회사 스마트링크
Priority date: 2018-07-26
Filing date: 2019-07-26
Publication date: 2020-01-30
Also published as: KR102142022B1; KR20200012302A

Abstract

The present invention relates to a refrigerant stabilization system and a control method therefor. The refrigerant stabilization system according to the present invention comprises: a cooling device for sequentially circulating a refrigerant along a compressor, a condenser, an expansion valve and an evaporator; and a preheating/stabilizing tank, which has, as one bundle, a first connection line connecting the compressor and the condenser and a second connection line connecting the condenser and the expansion valve and simultaneously performs preheating and cooling on the refrigerant passing through the first connection line and the stabilization of a molecular structure by compressing, with a vortex flow, the refrigerant passing through the second connection line.

Description

Refrigerant stabilization system and control method

The present invention relates to a refrigerant stabilization system and a control method thereof, and more specifically, to activate a refrigerant primarily, to increase a refrigerant speed and cooling efficiency secondly, and to heat heat of a refrigerant having a high temperature / high pressure through preheat cooling. The present invention relates to a refrigerant stabilization system and a control method of maximizing energy saving and maximizing the efficiency of maintaining a stable refrigeration cycle by reducing the overload of the discharged condenser.

In general, a cooling system (hereinafter referred to as a "chiller") is widely used throughout the industry.

Such a freezer, as anyone knows, is largely comprised of a compressor, a condenser, an expansion valve, and an evaporator. Here, the compressor adiabaticly compresses the low-temperature low-pressure refrigerant to produce a high-temperature high-pressure gas refrigerant, and the condenser makes the high-temperature, high-pressure gas refrigerant discharged from the compressor into a saturated liquid state by heat exchange. The expansion valve makes the refrigerant liquefied and conveyed from the condenser into a low pressure saturated wet steam state, and the evaporator forms a cycle of evaporating the refrigerant transferred from the expansion valve by heat exchange to make a saturated steam state and send it to the compressor.

Here, the evaporator cools the refrigerant transferred from the expansion valve by exchanging heat with the surrounding space or the object to be cooled.

However, the above-mentioned conventional refrigerator has a problem that the refrigerant does not play the same role as the initial refrigerant state due to deterioration phenomenon, and there is another problem that the efficiency of the refrigerator is lowered due to this problem.

In order to solve the problem, Patent Document 1 proposed by the present applicant (KR 10-1817227 B1) is mounted on the connection pipe connecting the compressor and the condenser constituting the refrigerator, and / or the connection pipe connecting the expansion valve and the evaporator A refrigerant stabilizing device, comprising: mixing means for inducing an unstable refrigerant to stabilize a vortex flow; And a tank for confining the mixing means therein, wherein the tank allows the refrigerant stabilized by the mixing means to flow out while introducing the unstable refrigerant to the inside, wherein the tank has a hollow cylindrical shape and has an open top and bottom ends. Is closed by an upper cover and a lower cover, and the upper cover is equipped with an inlet pipe for guiding the unstable refrigerant guided along the connection pipe connected to the discharge end of the compressor or the expansion valve into the tank, and the lower cover is stabilized by mixing means. An outlet pipe for guiding the refrigerant to the inside of the tank is installed, and the outlet pipe is connected to a connection pipe connected to the input terminal of the condenser or the evaporator, and an overflow pipe for guiding the stabilized refrigerant to the outlet pipe side is disposed inside the tank. The bottom of is connected to the outflow pipe and the top extends vertically toward the top cover side and moves along the overflow pipe on the outer circumferential surface. The spiral groove is formed to extend from the bottom of the outer peripheral surface of the overflow pipe to the upper side of the overflow pipe so as to form a vortex flow so that the stabilized refrigerant is more stabilized, and the mixing means is disposed inside the top cover but is unstable guided through the inflow pipe. And a vortex impeller which forms a vortex flow so as to stabilize the unstable refrigerant while stabilizing the unstable refrigerant while rotating along the inner circumferential surface of the tank by the pressure of the coolant; and the vortex impeller is rotatably supported by the frame. Is a technique that can be fixed to the top cover by a bracket.

In Patent Document 1, the refrigerant stabilization device (hereinafter referred to as a stabilization tank) was intended to further reduce the temperature of the low-temperature / high pressure refrigerant from the condenser to further maximize the cooling efficiency of the cooler, but in practice, the condenser and expansion valve There is a problem in that the temperature of the low-temperature / high-pressure refrigerant is dropped too much by the stabilization tank provided in the end to become a low-pressure gas state before entering the expansion valve, so that the expansion effect is significantly lowered.

Therefore, there is a further need for a system that can control the passage of the stabilization tank in accordance with the temperature of the refrigerant passing through each connecting pipe to expect the optimal cooling effect.

In order to solve the above problems, the present invention includes a preheating / stabilization tank in a bundle between the condenser and the expansion valve and between the compressor and the condenser and controls the bypass to activate the refrigerant first, and the refrigerant secondly. Provides a refrigerant stabilization system and its control method to increase the speed and cooling efficiency and to maintain stable refrigeration cycle, save energy and maximize efficiency by reducing overload of condenser that releases heat of high temperature / high pressure refrigerant through preheat cooling. The purpose is to.

Refrigerant stabilization system according to the present invention for achieving the above object is a cooling device 10 in which the refrigerant is sequentially circulated along the compressor 20, the condenser 30, expansion valve 40 and the evaporator 50; The first connection line 11 connecting the compressor 20 and the condenser 30 and the second connection line 12 connecting the condenser 30 and the expansion valve 40 are provided in a bundle. Preheating / stabilization tank which pre-cools the refrigerant passing through the connection line 11 and the refrigerant passing through the second connection line 12 by vortex flow to simultaneously stabilize the molecular structure. Characterized in that it comprises (100).

In addition, the preheating / stabilization tank 100, the tank body 110; It is connected to the upper end of the tank body 110 and the second connection line 12, the low-temperature / high-pressure refrigerant of the condenser 30 is introduced, the vortex impeller to form a vortex flow inside the tank body 110 A second inlet pipe 150 having a 180; It is connected to the lower end of the tank body 110 and the second connection line 12 to supply the stabilized refrigerant through the tank body 110 to the expansion valve 40, the vortex to the tank body 110 A second outlet pipe 160 having a overflow pipe 170 for sucking the stabilized refrigerant through a flow phenomenon; A first inlet pipe 120 connected to a lower end of the tank body 110 and the first connection line 11 to introduce a high temperature / high pressure refrigerant of the compressor 20; A coil tube 140 wound around the tank body 110 to preheat and cool the high temperature / high pressure refrigerant by the low temperature / high pressure refrigerant through a vortex flow phenomenon; A first outlet pipe 130 connected to an upper end of the tank body 110 and the first connection line 11 to supply a preheated coolant to the condenser 30 through the coil pipe 140. can do.

In addition, the sensor (S) for detecting the temperature and pressure of the refrigerant in the first inlet pipe 120, the first outlet pipe 130, the second inlet pipe 150, the second outlet pipe 160, respectively; A first bypass B1 connecting the first inlet pipe 120 and the middle of the coil pipe 140 and a second connecting the middle part of the coil pipe 140 and the first outlet pipe 130. Bypass B2; In order to supply the refrigerant having the optimal temperature and pressure to minimize the load of the condenser 30 according to the temperature and pressure change amount ΔT, ΔP of the refrigerant through the sensor S to the condenser 30. It may include a control unit 300 for opening and closing the first bypass (B1) and the second bypass (B2).

In addition, the first bypass B1 section may have a longer section than the second bypass B2 section.

In addition, the first connection line 11 between the compressor 20 and the preheating / stabilization tank 100 includes a heat dissipation tube 200 for firstly dissipating the refrigerant immediately before entering the preheating / stabilization tank 100. It may be further provided.

In addition, the heat dissipation tube 200, the tubular body 210 surrounding the surface of a portion of the first connection line 11; The outer circumferential surface of the tubular body 210 may have a plurality of heat dissipation fins 220 formed in the longitudinal direction.

In addition, in the refrigerant stabilization method according to the present invention, the first and second bypasses B1 and B2 are controlled by the control unit 300 when the temperature and pressure change amounts ΔT and ΔP of the refrigerant are equal to or lower than the set A (T1) temperature and pressure. A first stabilizing step (S100) which does not perform preheating cooling through the preheating / stabilization tank 100 by opening all; If the temperature and pressure change amounts ΔT and ΔP of the refrigerant are equal to or higher than the set A (T1) temperature and pressure, the control unit 300 opens the first bypass B1 and closes the second bypass B2 to preheat it. Second stabilization step (S200) for performing preheat cooling through the / stabilization tank (100); If the temperature and pressure change amount ΔT and ΔP of the refrigerant is equal to or higher than the set temperature B and the pressure T2, the control unit 300 closes the first bypass B1, opens the second bypass B2, and preheats it. Third stabilization step (S300) for performing preheat cooling through the / stabilization tank (100); If the temperature and pressure change amount ΔT, ΔP of the refrigerant is equal to or higher than the set C (T3) temperature and pressure, the control unit 300 closes all of the first and second bypasses B1 and B2 to preheat / stabilize the tank 100. It may include a fourth stabilization step (S400) for performing the preheat cooling through the maximum.

By providing the present invention configured as described above, by primarily activating the refrigerant, and secondly to increase the refrigerant speed and cooling efficiency, to reduce the overload of the condenser to discharge the heat of the refrigerant of high temperature / high pressure through preheating cooling Maintaining a stable refrigeration cycle, saving energy and maximizing efficiency is effective.

1 is a block diagram showing an embodiment of a refrigerant stabilization system according to the present invention.

2 is a block diagram showing another embodiment of a refrigerant stabilization system according to the present invention.

3 is a flowchart illustrating an algorithm for a stabilization method using a refrigerant stabilization system according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

The refrigerant stabilization system of the present invention is basically a cooling device in which the refrigerant is circulated sequentially along the compressor 20, the condenser 30, the expansion valve 40 and the evaporator 50, as shown in FIG. Provide 10.

In addition, the refrigerant circulating in the air conditioner 10 includes both a refrigerant gasified according to temperature and pressure, and a refrigerant liquefied. Hereinafter, the refrigerant is collectively described.

Then, the preheating / stabilization of the first connection line 11 connecting the compressor 20 and the condenser 30 and the second connection line 12 connecting the condenser 30 and the expansion valve 40 in a bundle. Tank 100.

Referring to FIG. 1, the preheating / stabilization tank 100 includes precooling of the refrigerant passing through the first connection line 11 and a refrigerant passing through the second connection line 12. It can be compressed at the same time to stabilize the molecular structure.

That is, while performing the stabilization of the low temperature / high pressure refrigerant passing through the condenser 30 through the preheating / stabilization tank 100, the condenser through heat exchange with the high temperature / high pressure refrigerant passing through the compressor 20 relatively To lower the temperature of the refrigerant entering the 30 to prevent the overload of the condenser 30.

At this time, the preheating / stabilization tank 100 is provided with a tank body 110 having a space therein, the first outlet pipe 130, the second inlet pipe 150 is the upper end of the tank body 110 The first inlet pipe 120 and the second outlet pipe 160 are connected to the lower end of the tank body 110.

In other words, the second inlet pipe 150 is connected to the upper end of the tank body 110 and the second connection line 12, the low temperature / high pressure refrigerant of the condenser 30 is introduced, the tank body It has a vortex impeller 180 to form a vortex flow inside the (110).

In addition, the second outlet pipe 160 is connected to the lower end of the tank body 110 and the second connection line 12. The refrigerant stabilized through the tank body 110 is expanded to the expansion valve 40. The tank body 110 has a overflow pipe 170 for sucking the stabilized refrigerant through the vortex flow phenomenon to be supplied to.

That is, the low temperature / high pressure refrigerant passing through the condenser 30 along the second connection line 12 enters the tank body 110 along the second inlet pipe 150 and the vortex impeller 180. By dispersing and stabilizing the refrigerant (liquid in the liquid state) while causing a vortex flow phenomenon therein, the expansion valve 40 along the second outlet pipe 160 through the overflow pipe 170. ) Will be supplied.

On the other hand, the first inlet pipe 120 is connected to the lower end of the tank body 110 and the first connection line 11 so that the high temperature / high pressure refrigerant of the compressor 20 is introduced.

At this time, the coil body 140 is wound around the tank body 110 to preheat and cool the high temperature / high pressure refrigerant by the low temperature / high pressure refrigerant through the vortex flow phenomenon.

In addition, the first outlet pipe 130 is connected to the upper end of the tank body 110 and the first connection line 11 to supply the refrigerant preheated and cooled through the coil pipe 140 to the condenser 30. Connected.

On the other hand, according to Figure 2, the first inlet pipe 120, the first outlet pipe 130, the second inlet pipe 150, the second outlet pipe 160 for detecting the temperature and pressure of the refrigerant, respectively (S) is provided.

In addition, a first bypass B1 connecting the first inlet pipe 120 and the middle portion of the coil tube 140 is installed, and the middle portion of the coil tube 140 and the first outlet tube 130. The second bypass (B2) connecting) is installed.

In addition, the refrigerant having the optimal temperature and pressure to minimize the load of the condenser 30 may be supplied to the condenser 30 according to the temperature and pressure change amounts ΔT and ΔP of the refrigerant through the sensor S. And a control unit 300 to control the opening and closing of the first bypass B1 and the second bypass B2.

In this case, the first bypass B1 section may have a longer section than the second bypass B2 section.

On the other hand, in the first connection line 11 between the compressor 20 and the preheating / stabilization tank 100, a heat dissipation tube 200 for primary heat dissipation of the refrigerant immediately before entering the preheating / stabilization tank 100 is provided. It may be further provided.

The heat dissipation tube 200 and the tube body 210 surrounding the surface in a portion of the first connection line (11); It may be integrally formed with a plurality of heat radiation fins 220 formed along the longitudinal direction on the outer circumferential surface of the tubular body 210.

That is, the preheated high temperature / high pressure refrigerant passing through the preheating / stabilization tank 100 may be provided to the condenser 30 by reducing the temperature by air cooling through the heat dissipation tube 200.

Furthermore, as shown in FIG. 3 using the refrigerant stabilization system of the present invention configured as described above, an algorithm is proposed as a method of stabilizing a refrigerant.

First, in the first stabilization step (S100), the control unit 300 compares the temperature and pressure measured by the respective sensors (S), but the temperature and pressure change amount (ΔT, ΔP) of the refrigerant is set A (T1). When the temperature and pressure are lower than each other, the first and second bypasses B1 and B2 are opened by the control unit 300 so as not to perform preheat cooling through the preheating / stabilization tank 100.

That is, since the overload of the condenser 30 does not occur when the temperature and pressure change amounts ΔT and ΔP of the refrigerant are small, it is preferable to bypass the first and second bypasses B1 and B2 without cooling.

Second, in the second stabilization step (S200), the control unit 300 compares the temperature and pressure measured by the respective sensors S, but the temperature and pressure change amounts ΔT and ΔP of the refrigerant are set A (T1). If the temperature and pressure are equal to or higher, the control unit 300 opens the first bypass B1, closes the second bypass B2, and performs preheat cooling through the preheat / stabilization tank 100.

Third, in the third stabilization step (S300), the control unit 300 compares the temperature and pressure measured by the respective sensors (S), but the temperature and pressure change amount (ΔT, ΔP) of the refrigerant is set B (T2). If the temperature and pressure are equal to or higher, the control unit 300 closes the first bypass B1 and opens the second bypass B2 to perform preheat cooling through the preheat / stabilization tank 100.

Fourth, the fourth stabilization step (S400), the control unit 300 compares the temperature and pressure measured by the respective sensors (S), but the temperature and pressure change amount (ΔT, ΔP) of the refrigerant is set C (T3) If the temperature and the pressure or more, the control unit 300 closes all of the first and second bypasses B1 and B2 to perform preheating cooling through the preheating / stabilization tank 100 to the maximum.

Here, setting A, setting B, and setting C may be variously changed from a minimum to a maximum reference value according to the load of the condenser 30 to an arbitrary value set according to the conditions of the indoor load.

Finally, the vortex impeller 180 is disposed inside the tank body 110 so as not to interfere with the upper end of the overflow pipe, the tank body by the pressure applied by the unstable refrigerant flowing through the second inlet pipe 150 It is arranged to rotate along the inner circumferential surface of (110).

The vortex impeller 180 disposed as described above is stabilized by rotating and mixing the unstable refrigerant to form a vortex flow, and moves the stabilized refrigerant to the lower side of the tank body 110.

Here, the vortex impeller 180 is rotatably supported on a frame (not shown) or the like that does not interfere with the rotation of the refrigerant, and the frame (not shown) is the tank body 100 by a bracket (not shown) or the like. It is fixed to the top of the bracket, a frame (not shown) for rotatably supporting the vortex impeller 180 and a bracket (fixing the frame (not shown)) to the top of the tank body 100 is a known technique, so the detailed description Is omitted.

By providing the present invention configured as described above, by primarily activating the refrigerant, and secondly to increase the refrigerant speed and cooling efficiency, to reduce the overload of the condenser to discharge the heat of the refrigerant of high temperature / high pressure through preheating cooling Maintaining a stable refrigeration cycle, saving energy and maximizing efficiency can be expected.

The terms and words used in the specification and claims described above should not be construed as being limited to the ordinary or dictionary meanings, and the inventors should properly introduce the concept of terms to explain their own invention in the best way. It should be interpreted as meanings and concepts in accordance with the technical spirit of the present invention based on the principle that it can be defined.

Therefore, the configuration shown in the drawings and embodiments described herein is only one of the most preferred embodiments of the present invention, and do not represent all of the technical spirit of the present invention, it is possible to replace them at the time of the present application It should be understood that there may be various equivalents and variations.

According to the present invention, the refrigerant is primarily activated, the refrigerant speed and cooling efficiency are secondly increased, and the overload of the condenser that releases the heat of the high temperature / high pressure refrigerant through preheat cooling reduces the maintenance of a stable refrigeration cycle. And it can be used more effectively in refrigerant stabilization system because it can improve energy saving and efficiency.

Claims

A cooling device 10 in which refrigerant is circulated sequentially along the compressor 20, the condenser 30, the expansion valve 40, and the evaporator 50;

The first connection line 11 connecting the compressor 20 and the condenser 30 and the second connection line 12 connecting the condenser 30 and the expansion valve 40 are provided in a bundle. Preheating / stabilization tank which pre-cools the refrigerant passing through the connection line 11 and the refrigerant passing through the second connection line 12 by vortex flow to simultaneously stabilize the molecular structure. Refrigerant stabilization system comprising (100).
The method according to claim 1,

The preheating / stabilization tank 100,

A tank body 110;

It is connected to the upper end of the tank body 110 and the second connection line 12, the low-temperature / high-pressure refrigerant of the condenser 30 is introduced, the vortex impeller to form a vortex flow inside the tank body 110 A second inlet pipe 150 having a 180;

It is connected to the lower end of the tank body 110 and the second connection line 12 to supply the stabilized refrigerant through the tank body 110 to the expansion valve 40, the vortex to the tank body 110 A second outlet pipe 160 having a overflow pipe 170 for sucking the stabilized refrigerant through a flow phenomenon;

A first inlet pipe 120 connected to a lower end of the tank body 110 and the first connection line 11 to introduce a high temperature / high pressure refrigerant of the compressor 20;

A coil tube 140 wound around the tank body 110 to preheat and cool the high temperature / high pressure refrigerant by the low temperature / high pressure refrigerant through a vortex flow phenomenon;

A first outlet pipe 130 connected to an upper end of the tank body 110 and the first connection line 11 to supply a preheated coolant to the condenser 30 through the coil pipe 140. Refrigerant stabilization system, characterized in that.
The method according to claim 2,

Sensors (S) for detecting the temperature and pressure of the refrigerant in the first inlet pipe 120, the first outlet pipe 130, the second inlet pipe 150, the second outlet pipe 160, respectively;

A first bypass B1 connecting the first inlet pipe 120 and the middle of the coil pipe 140 and a second connecting the middle part of the coil pipe 140 and the first outlet pipe 130. Bypass B2;

In order to supply the refrigerant having the optimal temperature and pressure to minimize the load of the condenser 30 according to the temperature and pressure change amount ΔT, ΔP of the refrigerant through the sensor S to the condenser 30. Refrigerant stabilization system comprising a control unit (300) for opening and closing the first bypass (B1) and the second bypass (B2).
The method according to claim 3,

The first bypass (B1) section is a refrigerant stabilization system, characterized in that having a relatively longer section than the second bypass (B2) section.
The method according to claim 1,

The first connection line 11 between the compressor 20 and the preheating / stabilization tank 100 is further provided with a heat dissipation tube 200 for primary heat dissipation of the refrigerant immediately before entering the preheating / stabilization tank 100. Refrigerant stabilization system, characterized in that.
The method according to claim 5,

The heat dissipation tube 200,

A tubular body (210) surrounding a surface of a portion of the first connection line (11);

Refrigerant stabilization system, characterized in that it has a plurality of heat radiation fins (220) formed along the longitudinal direction on the outer peripheral surface of the tubular body (210).
In the refrigerant stabilization method using a refrigerant stabilization system according to any one of claims 1 to 5,

When the temperature and pressure change amount ΔT, ΔP of the refrigerant is equal to or lower than the set A (T1) temperature and pressure, the control unit 300 opens all of the first and second bypasses B1 and B2 to preheat / stabilize the tank 100. A first stabilizing step (S100) not performing preheating cooling through;

If the temperature and pressure change amounts ΔT and ΔP of the refrigerant are equal to or higher than the set A (T1) temperature and pressure, the control unit 300 opens the first bypass B1 and closes the second bypass B2 to preheat it. Second stabilization step (S200) for performing preheat cooling through the / stabilization tank (100);

If the temperature and pressure change amount ΔT and ΔP of the refrigerant is equal to or higher than the set temperature B and the pressure T2, the control unit 300 closes the first bypass B1, opens the second bypass B2, and preheats it. Third stabilization step (S300) for performing preheat cooling through the / stabilization tank (100);

If the temperature and pressure change amount ΔT, ΔP of the refrigerant is equal to or higher than the set C (T3) temperature and pressure, the control unit 300 closes all of the first and second bypasses B1 and B2 to preheat / stabilize the tank 100. Refrigerant stabilization method comprising a fourth stabilization step (S400) to perform the preheating cooling through.