KR102067264B1 - Refrigerator for detecting low flow using pipe assembly - Google Patents

Abstract

The present invention relates to a refrigerator and, more specifically, to a refrigerator for detecting a low flow rate using a pipe assembly, which can detect a low flow rate by linearizing fluids in cold water and cooling water inlet and outlet ports. Moreover, the pipe assembly provided with a paddle type flow rate detection switch is installed to accurately detect the low flow rate of less than 50%.

Description

REFRIGERATOR FOR DETECTING LOW FLOW USING PIPE ASSEMBLY}

The present invention relates to a refrigerator, and in particular, the cold water and the cooling water inlet and outlet fluid can be linearized respectively to detect the low flow rate, by installing a pipe assembly with a paddle-type flow rate detection switch to achieve a low flow rate of less than 50% The present invention relates to a refrigerator capable of detecting a low flow rate using a pipe assembly that allows accurate detection.

The refrigerator is a refrigerator that cools water flowing through the heat exchanger by using evaporation heat when the refrigerant evaporates, and condenses and reuses the evaporated refrigerant.

Such a refrigerator includes a water-cooled refrigerator (water chiller) such as an absorption type, and an air-cooled type.

For example, the cold water two-stage absorption type refrigerator in the refrigerator has two cycles, and when the cooling load is lowered to 80% or less, one cycle may be stopped to improve the energy use efficiency (COP) by 25%. Most of the cooling season, except for the cold weather, is operated with a cooling load of 80% or less.

Low temperature water two stage absorption chiller is a pollution-free product that uses water as a refrigerant, and it is a product that can prevent electric power concentration in summer by using heat energy as a driving source. In addition, it is very safe because it is operated in a vacuum state, and it can be operated unattended because it can be operated automatically with the product combined with heat exchanger.

This cold water two-stage absorption chiller has been published by Korean Patent Publication No. 10-1377690 filed by the applicant (name: high efficiency cold water two-stage absorption chiller using absorption heat exchanger).

Referring to FIG. 1, the high-efficiency cold water two-stage absorption chiller 100 using the absorption heat exchanger includes a first shell 110, a second shell 120, a third shell 130, and a third shell 130. The first absorption heat exchanger 210, the second absorption heat exchanger 220, the first distributor 230, and the second distributor 240 are included.

First, the first shell 110, the evaporator 111 is installed on the left side as shown in the drawing, the absorber 112 is installed on the right side, the first eliminator between the evaporator 111 and the absorber 112 is Is installed.

In the second shell 120, the first regenerator 121, the auxiliary regenerator 122, and the condenser 123 are sequentially installed from the bottom, and the second eliminator is installed on the side of the condenser 123. .

In addition, the third shell 130, the second regenerator 131 is installed on the upper portion, the auxiliary absorber 132 is installed on the lower portion, the lower surface of the second regenerator 131 and the auxiliary absorber 132 are respectively dropped The absorbent liquid is collected to one side to facilitate discharge, and a third eliminator is installed between the second regenerator 131 and the auxiliary absorber 132.

Meanwhile, the low temperature heat exchanger 140, the high temperature heat exchanger 150, and the auxiliary heat exchanger 160 are connected to the respective devices through the absorbent liquid line.

In addition, the first absorption heat exchanger 210 is installed on the upper end of the absorber 112 of the first shell 110 to discharge the diluted absorbent liquid (dilution) discharged from the first shell 110 in the low temperature heat exchanger 140. The absorber 112 absorbs heat from the concentrated absorbent liquid (concentrate) injected into the upper end of the absorber 112 and heats it, and then supplies it to the low temperature heat exchanger 140.

In addition, the second absorption heat exchanger 220 is installed on the upper side of the auxiliary absorber 132 of the third shell 130 to discharge the diluted auxiliary absorption liquid (secondary intermediate liquid) discharged from the third shell 130 to the auxiliary heat exchanger. At 160, the absorber heats up the subsidiary absorber 132, which is injected into the upper side of the subsidiary absorber 132, and heats the supplied subsidiary heat exchanger 160.

In addition, the first distributor 240 is installed in the middle portion of the evaporator 111 of the first shell 110 made of a heat pipe, temporarily stores the refrigerant injected into the evaporator 111, and then falls back to the evaporator 111. Make sure the coolant is in contact with the surface.

In addition, the second distributor 230 is installed in the middle portion of the absorber 112 of the first shell 110 made of a heat pipe, temporarily stores the concentrated absorbent liquid injected into the absorber 112, and then re-falls the absorber 112. Make sure that the absorbent liquid contacts the surface of

Hereinafter, with reference to the accompanying drawings the operation of the high-efficiency low-temperature water two-stage absorption chiller using a conventional absorption heat exchanger will be described in detail as follows.

First, the operation of the main system, the absorption liquid (dilution) diluted by the upper end of the absorber 112 to absorb the refrigerant vapor is discharged from the absorber 112 is pressed by the pump 101 to heat the first absorption heat exchange Supplied to the unit 210. Then, the rare liquid absorbs the heat of the concentrated absorbent liquid (concentrate) injected into the upper part of the absorber 112 while passing through the first absorption heat exchanger 210, is heated, and then supplied to the low temperature heat exchanger 140, and the low temperature heat exchanger. After passing through the 140 and the high temperature heat exchanger 150 to the first regenerator 121 is dispersed in the upper portion of the first regenerator 121, a part of the refrigerant vapor is discharged, medium absorbed liquid (intermediate liquid) The silver is transferred to the second regenerator 131 via the high temperature heat exchanger 150 via the pump 101 and is dispersed in the upper portion of the second regenerator 131.

The refrigerant vapor is discharged from the second regenerator 131, and the concentrated absorbent liquid (concentrate) is dispersed by the pump 101 through the low temperature heat exchanger 140, back to the absorber 112, and dispersed at the upper end of the absorber 112. At this time, since the second distributor 230 is installed in the middle portion of the absorber 112, the absorbent liquid injected into the absorber 112 is temporarily dropped in the second distributor 230 and then dropped again. Evenly contact with

In addition, when the auxiliary system is described, the auxiliary absorbing liquid (auxiliary diluent) diluted by absorbing the refrigerant vapor passed from the second regenerator 131 exits the auxiliary absorber 132 and is pressurized by the pump 101 to supply the auxiliary heat exchanger 160. Go to the secondary player (122).

Scattered from the upper end of the auxiliary regenerator 122, the refrigerant vapor is discharged, and the concentrated auxiliary absorbent liquid (auxiliary concentrate) returns to the auxiliary absorber 132 via the auxiliary heat exchanger 160.

At this time, the second absorption heat exchanger 220 heats the diluted auxiliary absorption liquid (auxiliary intermediate liquid) discharged from the third shell 130 to the upper side of the auxiliary absorption liquid 132 (secondary agricultural liquid). It absorbs and heats and then supplies it to the auxiliary heat exchanger (160).

On the other hand, in the condenser 123, the refrigerant vapor generated in the first regenerator 121 and the auxiliary regenerator 122 is condensed, and the refrigerant is delivered to the evaporator 111. In the evaporator 111, the refrigerant is scattered by the pump 101 to the upper portion of the evaporator 111, and the partially evaporated refrigerant vapor is transferred to the absorber 112 through the first eliminator. The refrigerant which has not been evaporated is scattered under the evaporator 111 and scattered back to the top of the evaporator 111 by the pump 101. At this time, since the first distributor 240 is installed in the middle of the evaporator 111, the refrigerant injected into the evaporator 111 is temporarily stored in the first distributor 240 and then dropped again. Evenly contact with

In addition, the cold water is cooled while flowing inside the tube of the evaporator 111 is used for cooling, the cooling water absorbs heat while passing through the absorber 112, the auxiliary absorber 132, the condenser 123 is heated to the cooling tower ( And release heat to the atmosphere and continue the cycle of cooling and returning back to absorber 112.

However, such a conventional refrigerator is operated at a constant flow rate in the range of 100% without changing the cooling water and cooling water flow rate according to the cooling load, and the rotation speed of the cooling water / cooling water pump is always kept constant at the maximum max. Regardless of the cooling load. As a result, the power consumption of the chilled water / cooled water pump is constantly consumed regardless of the cooling load conditions. Even if the rotational frequency of the pump is lowered according to the cooling load conditions, if the cold water / cooled water flow rate is less than 50% of the rated condition, Alarm is generated by recognizing the flow abnormality, there is a problem that the dilution operation or abnormal stop.

Domestic Patent Publication No. 10-1377690

The present invention is to solve the above problems, it is possible to detect the low flow rate by linearizing the fluid in the cold water and the cooling water inlet and outlet respectively, and to install a pipe assembly with a paddle-type flow rate detection switch of less than 50% It is an object of the present invention to provide a refrigerator capable of detecting a low flow rate using a pipe assembly that accurately detects a flow rate.

In addition, the present invention immediately stops the cold water / cooling water pump, close the hot water control valve, stop the absorbent liquid / refrigerant pump when the detection signal of the flow detection switch of the pipe assembly installed in the cold water pipe for more than a predetermined time continuously, the heat transfer pipe If the detection signal of the flow detection switch of the pipe assembly installed in the cooling water pipe is not detected continuously for more than a certain time, close the hot water control valve and perform dilution operation. Another object of the present invention is to provide a freezer capable of detecting a low flow rate by immediately stopping the pump and closing the hot water control valve and stopping the absorbent / refrigerant pump to prevent freezing of the heat pipe.

Features of the present invention for achieving the above object,

The refrigerator includes a pipe assembly installed at each of at least one inlet and outlet of a cold water, a cooling water, and a hot water pipe, and having a paddle type flow rate sensing switch to straighten the fluid.

The pipe assembly may include: a main pipe having flanges at both ends thereof and a paddle type flow sensing switch installed at a rear end thereof; Rectifying turbulent flow and vortex to steady flow, straightening the fluid in the main pipe having an asymmetrical and irregular flow rate distribution so as to make accurate flow rate measurement and installed in the inner front of the main pipe which is the front of the flow sensing switch. It consists of a straightener.

Here, the refrigerator capable of detecting the low flow rate using the pipe assembly immediately stops the cold water pump and the cooling water pump of the refrigerator when the detection signal of the flow rate detection switch installed in the cold water pipe is not continuously detected for a predetermined time. At the same time, the hot water control valve of the refrigerator is closed to prevent freezing of the heat transfer tube, and the absorption liquid pump and the refrigerant pump of the refrigerator are stopped.

Here, the refrigerator having a low flow rate detection using the pipe assembly closes the hot water control valve of the refrigerator and performs a dilution operation when a detection signal of the flow rate detection switch installed in the cooling water pipe is not continuously detected for a predetermined time. When the refrigerant temperature is lower than the set temperature, the cold water pump of the refrigerator and the cooling water pump are immediately stopped to prevent freezing of the heat transfer tube, and the hot water control valve of the refrigerator is closed, and the absorption liquid pump and the refrigerant pump of the refrigerator are stopped. Let's do it.

Here, the freezer is a water-cooled freezer.

According to the absorption type chiller capable of detecting the low flow rate using the pipe assembly of the present invention configured as described above, the low flow rate can be sensed by straightening the fluid at the cold water and the cooling water inlet and outlet, respectively, and the pipe assembly provided with a paddle type flow sensing switch. It can accurately detect low flow rate of less than 50% and operate at 20 ~ 100% flow rate to reduce power consumption.

Further, according to the present invention, if the detection signal of the flow detection switch of the pipe assembly installed in the cold water pipe is not continuously detected for a predetermined time or more, the cold water / coolant pump is stopped immediately, the hot water control valve is closed and the absorbent / refrigerant pump is stopped. If the detection signal of the flow detection switch of the pipe assembly installed in the cooling water pipe is not continuously detected for more than a certain time, close the hot water control valve and perform the dilution operation.If the refrigerant temperature drops below the set temperature, the cold water / By stopping the coolant pump immediately and closing the hot water control valve and stopping the absorbent / refrigerant pump, it is possible to prevent the breakage of the absorption chiller by freezing the heat pipe.

1 is a system diagram showing the configuration of a high-efficiency cold water two-stage absorption chiller using a conventional absorption heat exchanger.
2 is a system diagram showing a configuration of a refrigerator capable of detecting a low flow rate using a pipe assembly according to an embodiment of the present invention.
3 is a side view illustrating a configuration of the pipe assembly of FIG. 2.
4 is a front view of FIG. 3.
5 is a cross-sectional view of FIG. 3.

Hereinafter, with reference to the accompanying drawings the configuration of a refrigerator capable of detecting a low flow rate using a pipe assembly according to an embodiment of the present invention in detail as follows.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

2 is a system diagram showing a configuration of a refrigerator capable of detecting a low flow rate using a pipe assembly according to an embodiment of the present invention, FIG. 3 is a side view showing the configuration of a pipe assembly of FIG. 2, and FIG. 4 is a front view of FIG. 3. 5 is a cross-sectional view of FIG. 3.

2 to 5, the absorption chiller 1 according to one embodiment of the present invention is installed at the inlet and outlet of the cold water pipe (L1), the cooling water pipe (L2), respectively, straightening the cold water and the cooling water flow rate of the paddle type The pipe assembly 20 with the sensing switch 10 is installed. At this time, in one embodiment of the present invention, the pipe assembly 20 is a cold water pipe (L1) and the cooling water pipe (L2) of the absorption chiller (1) is shown in the state, it is not shown in the drawing, but also applied to the water-cooled refrigerator It is possible.

The pipe assembly 20 is composed of a main pipe 21 and a straightener 23.

The main pipe 21 has a flange (F) is formed at both ends, the paddle type flow rate sensing switch 10 is inserted into the upper surface of the rear end is inserted. At this time, the front of the main pipe 21, that is, the inlet side may be provided with a T-shaped connecting pipe to facilitate the removal of foreign matter and the internal inspection of the straightener 23.

The straightener 23 rectifies the turbulent flow and the vortices into a normal flow, and forms a grid to form a flow rate measurement by linearizing the fluid in the main pipe 23 having an asymmetrical and irregular flow rate distribution. It is installed in the inner front end of the main pipe 21 which is front.

Hereinafter, the operation of the refrigerator capable of detecting a low flow rate using a pipe assembly according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Absorption freezer according to an embodiment of the present invention is driven in a normal operation.

On the other hand, since the pipe assembly 20 is installed at the inlet and outlet of the cold water pipe (L1) and the cooling water pipe (L2), respectively, when the cold water and the coolant flow in and out, rectification of the turbulence and the vortex by the straightener 23 is performed as the normal flow. To straighten the fluid in the main pipe 23 with an asymmetrical and irregular flow rate distribution.

Then, since the paddle-type flow rate sensing switch 10 can measure the correct flow rate, the cold / cooled water flow rate can detect 20 to 100% of the rated condition, thereby operating even in a low flow rate condition. Since the rotation frequency can be adjusted by controlling the cooling pump P1 and the cooling water pump P2 according to the low flow conditions, the power consumption can be relatively lowered.

In addition, according to the present invention, if the detection signal of the flow detection switch 10 installed in the cold water pipe (L1) is not continuously detected for a predetermined time or more, the cold water pump (P1) and the coolant pump (P2) of the freezer (1) immediately By stopping, closing the hot water control valve V1 of the refrigerator 1, and stopping the absorption liquid pump P3 and the refrigerant pump P4 of the refrigerator 1, it is possible to prevent the heat transfer tube freezing.

In addition, according to the present invention, when the detection signal of the flow rate detection switch 10 installed in the cooling water pipe L2 is not continuously detected for a predetermined time, the hot water control valve V1 of the refrigerator 1 is closed and the dilution operation is performed. When the coolant temperature drops below the set temperature, the cold water pump P1 and the coolant pump P2 of the freezer 1 are immediately stopped, and the hot water control valve V1 of the freezer 1 is closed and the freezer 1 is closed. The absorption liquid pump P3 and the refrigerant pump P4 can be stopped to prevent the heat transfer tube freezing.

As those skilled in the art would realize, the described embodiments may be modified in various ways, all without departing from the spirit or scope of the present invention. It is to be understood, however, that the present invention is not limited to the specific forms referred to in the description, but rather includes all modifications, equivalents and substitutions within the spirit and scope of the invention as defined by the appended claims. Should be.

The present invention can be selectively applied according to the type of refrigerator, and the flow rate of the amount of hot water (low temperature water absorption chiller), the amount of gas (gasification absorption chiller), and the amount of steam (steamification absorption chiller) can be detected.

10: flow detection switch 20: pipe assembly
21: main pipe 23: straightener
L1, L2: Cold water, cooling water piping P1, P2: Cold water, cooling water pump
V1: hot water control valve

Claims (5)

In the freezer,
Installed in each of the at least one inlet and outlet of the cold water, cooling water, hot water piping, and includes a pipe assembly with a flow sensing switch of the paddle type by straightening the fluid,
If the detection signal of the flow rate detection switch installed in the cold water pipe is not continuously detected for a predetermined time or more, the cold water pump and the cooling water pump of the refrigerator are stopped immediately and the hot water control valve of the refrigerator is closed to prevent freezing of the heat pipe, A refrigerator capable of detecting a low flow rate using a pipe assembly, characterized in that for stopping the absorption liquid pump of the refrigerator and the refrigerant pump. The method of claim 1,
The pipe assembly,
A main pipe having a flange formed at both ends and a paddle type flow sensing switch installed at a rear end thereof;
Rectifying turbulent flow and vortex to steady flow, straightening the fluid in the main pipe having an asymmetrical and irregular flow rate distribution so as to make accurate flow rate measurement and installed in the inner front of the main pipe which is the front of the flow detection switch. Refrigerator capable of detecting low flow rate using a pipe assembly, characterized in that consisting of a straightener. delete The method of claim 1,
The freezer capable of detecting a low flow rate using the pipe assembly,
If the detection signal of the flow rate detection switch installed in the cooling water pipe is not continuously detected for a predetermined time or more, close the hot water control valve of the refrigerator and perform a dilution operation. A chiller capable of detecting a low flow rate using a pipe assembly, wherein the cold water pump of the refrigerator, the cooling water pump are stopped immediately, and the hot water control valve of the refrigerator is closed, and the absorption liquid pump and the refrigerant pump of the refrigerator are stopped. The method of claim 1,
The freezer,
A freezer capable of low flow rate detection using a pipe assembly, characterized in that the water-cooled freezer.

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