KR20060002676A - Heat exchanger of refrigerator - Google Patents

Abstract

The present invention relates to a heat exchanger system, and an object thereof relates to an evaporator and a condenser heat exchanger of a refrigerating device, in particular, a heat exchanger of contaminated heat source fluid such as a waste heat source or seawater as a heat exchanger of an evaporator and a condenser constituting a heat pump. It is a device to recover the heat exchanger, so that it is easy to clean the heat exchanger to maintain high performance, and it is used as an evaporator and condenser to compensate for the shortcomings of the shell and tube, will be.

To this end, the heat exchanger system has a heat pipe 104, a baffle 105, a tube plate 102 and 116, and a header 116, 117 and 119 inside the shell 101. The shell flange 103 and the tube plate flange 116 are coupled to each other by a bolt 113 to effectively exchange heat with natural heat sources such as river water, sea water or sewage, and clean the heat exchanger tube. It is configured to facilitate the removal of contaminants by separating the connecting bolt 113 of the shell flange 103 and the tube plate flange 116 to open the heat transfer pipe to the outside.

Description

Heat Exchanger for Refrigeration Units {Heat Exchanger Of Refrigerator}

1 is a configuration diagram of a general heat pump

Figure 2 is a longitudinal sectional view showing a shell and tube heat exchanger as an example of an evaporator or a condenser constituting a conventional heat pump;

3 is a cross-sectional view taken along line “A-A '” of FIG. 2;

4 is a right side view of FIG.

5 is a longitudinal sectional view showing a configuration of a heat exchanger according to the present invention.

Fig. 6 is a longitudinal sectional view showing the structure of still another heat exchanger according to the present invention.

<Description of the code | symbol about the principal part of drawing>

1-compressor 2-condenser

3-evaporator 101-shell

102-left tube plate 103-shell flange

104-Heat Pipes 106-Header Flange

116-right tube sheet

The present invention relates to a heat exchanger, the woodwork is related to the evaporator and condenser heat exchanger of the refrigerating device, in particular to the heat of the contaminated heat source fluid such as waste heat source or sea water to the heat exchanger of the evaporator and condenser constituting the heat pump The present invention relates to a device that makes it easy to clean a heat exchanger to maintain high performance, and to compensate for the shortcomings of a shell and tube by using a single or a combination of an evaporator and a condenser.

Such a heat pump has a cycle structure and a method of operation similar to a refrigerator, and only a low temperature heat of the evaporator is used in a form in which the heat exchanger is variably used as an evaporator or a condenser because the refrigerant flow is changed by only four-way operation. In the case of using a high temperature heat and low temperature heat of the refrigerator, evaporator and condenser, the difference is that the heat pump cycle.

In this regard, a conventional general heat pump is composed of at least five basic components such as a compressor (1), a condenser (2), an evaporator (3), an expansion valve (4), and four sides (5) as shown in FIG. 1) the refrigerant gas at the outlet of the evaporator 3 is compressed and introduced into the condenser 2 by the high temperature and high pressure gas through the four sides, and condensed by exchanging heat with external fluid (air or water, etc.) to expand the expansion valve (4). ), The refrigerant liquid introduced into the expansion valve (4) expands to a low temperature and low pressure state and phase-transforms into a gas of low temperature and low pressure after exchanging heat with an external fluid (air or water) in the evaporator (3). It is sucked into the compressor (1).

In addition, the refrigerant gas of the high temperature and high pressure of the compressor 1 is changed in the direction of flow in the four sides 5 so that the condenser 2 may be used as an evaporator, the evaporator 3 may be used as a condenser. At this time, the condenser 2 and the evaporator 3 is used as both a condenser and an evaporator.

The conventional heat pump of the above form mainly used an air heat source, but when the outside air temperature decreases during winter, the study of the heat pump using unutilized energy, such as river water, sea water and sewage, has been actively conducted. At present, the biggest problem in the diffusion of heat pumps using unutilized energy such as river water, sea water and sewage is related to the sudden deterioration of performance due to contamination of heat exchangers and the problems of production of the combined use of evaporators and condensers of heat exchangers.

The present invention prevents contamination of heat exchangers (condensers and evaporators), which is a component of heat pumps, and facilitates cleaning of heat exchangers (cleaning of contaminants of heat exchangers), thereby improving heat transfer performance. To improve the performance, and to produce a heat exchanger for both evaporator and condenser to solve the biggest problem in the diffusion of heat pump using unutilized energy such as river water, sea water and sewage.

Conventional heat fluid heat exchangers are plate-type heat exchangers or shell-and-tube types, and plate heat exchangers used in heat pumps are brazing a plurality of heat transfer plates, and thus, unutilized energy such as river water, sea water and sewage. The biggest problem when applied to the heat pump is that the scale is attached in a short time due to the pollutant, and the performance decreases rapidly. The cleaning of the plate heat exchanger (cleaning of the pollutant of the heat exchanger) can only be done with chemicals. It requires a lot of professional skills, causing a lot of work costs and environmental pollution. The shell and tube is a type of heat exchanger which is widely used at present, and is configured as shown in FIGS. 2, 3 and 4, and a plurality of heat pipes 24 are installed in parallel in the shell 21. Thus, while one fluid flows through the heat pipe 24, the other fluid is heat transfer in the process of flowing outside the heat pipe 24. In the shell 21, a fluid 25 flows the shell 21 in a zigzag to promote heat transfer and at the same time, a baffle 25 for maintaining a constant gap between the heat pipes 24 is provided. Is installed.

However, despite their widespread use, the heat pipes 24 are installed inside the corners 21, so that high heat contaminants of unutilized energy such as river water, sea water and sewage can cause the scales of the heat pipes 24 to be accumulated or other foreign substances. If you do not clean the heat pipe by disassembling the angle (21) to remove it, so the only cleaning method is the cleaning work by chemicals, so the environmental maintenance and cleaning technology required by the cleaning chemicals expensive maintenance cost In the form of the condenser and evaporator of the conventional shell and tube heat exchanger is not possible, there is a lot of difficulties in the heat pump supply of unutilized energy of river water, sea water and sewage.

The present invention seeks the following technology to solve the above problems.

First, the shell is disassembled and assembled in the form of a shell-and-tube heat exchanger that allows refrigerant to flow inside the heat pipe and flows the stream, sea water or sewage into the space between the tube and the shell. In the form of a structure to enable the cleaning, the shell is dismantled when the tube is cleaned, and the scale or other foreign matter attached to the tube is simply removed to remove the refrigerating device or heat pump heat exchanger using a natural heat source. It solves the problem of contamination of heat pipe, the biggest problem in dissemination.

Second, by making a heat exchanger of the evaporator and condenser combined to solve the biggest problem in the diffusion of heat pump using unutilized energy, such as river water, sea water and sewage.

Third, the heat transfer tube fixing tube plate is fixed on one side and the other end can flow freely to absorb the thermal expansion of the heat transfer tube.

Fourth, it is possible to solve the drawback of the large structure cost due to the low heat transfer rate of the open heat exchanger with a small structure with a high heat transfer rate which is an advantage of the shell and tub heat exchanger.

The technical problem of the present invention is to be clearly interpreted by the configuration of the preferred embodiment presented in the configuration of the invention.

In order to achieve the above object, the heat exchanger according to the present invention, for the heat exchange between the unutilized energy, such as river water, sea water and sewage (hereinafter referred to as heat fluid) and the refrigerating device or the heat pump, the refrigerant is introduced into the refrigerant inlet 110 and The heat transfer tube 104 inside the shell 101 is introduced through the header 116 to heat transfer 104 from the middle header 119 to the upper heat exchange tube 104 after heat exchange with the thermal fluid inside the shell 101. After the heat is introduced, the heat is discharged to the outlet header 117 and the refrigerant outlet 109, and the thermal fluid passes through the inlet 111 to be introduced into the shell 101 to heat the refrigerant inside the heat pipe 104. In the heat exchanger which is exchanged and is discharged to the thermal fluid outlet 112 after the direction of the flow is changed by the partition wall 105 installed in the shell (101),

A shell part composed of a shell 101, a shell flange 103, a thermal fluid inlet and an outlet 111 and 112 for introducing the thermal fluid and discharging it after heat exchange;

Heat pipe 104, headers (116, 117, 119), light plates (115, 107), light plate flanges (114, 118), pipe plates (102, 116) and light plate blocking flanges (receiving the refrigerant to be discharged after heat exchange) And a heat transfer tube part consisting of 106 and 120.

The features and advantages of the present invention will become more apparent from the detailed description of the preferred embodiments based on the accompanying drawings. Prior to this, the terms or words used in this specification and claims should not be construed as being limited to conventional or dictionary meanings, and the inventors may properly interpret the concept of terms in order to best explain their own inventions. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, the Example of the heat exchanger which concerns on this invention is described, referring an accompanying drawing.

5 and 6 are longitudinal cross-sectional views showing the configuration of a heat exchanger according to the present invention.

5, the heat exchanger shell (101), headers (116, 117, 119), tube plates (116, 102), heat pipe (104), partition (105), thermal fluid inlet, outlet (111, 112, a heat exchanger consisting of refrigerant inlet, outlet 109, 110, and plate blocking flanges 106, 120.

Reference numeral 104 is a heat pipe (tube) is a heat exchange between the heat fluid and the refrigerant, the form is a straight pipe, corrugated pipe, processed pipes processed inside and outside of the spiral, etc. are used, The inside of the coolant is provided, and the headers 116, 117, and 119 are installed at the inlet, the outlet, and the middle of the coolant to control the uniform flow of the coolant to the heat pipe 104 by the smooth distribution of the fluid.

The heat exchanger has a shell flange 103 attached to the right end of the cylindrical shell 101, a left end of the shell 101 is blocked, and a thermal fluid. The inlet 111 and the outlet 112 are attached on a shell 101, and each flange 103 is fastened by a tube plate flange 116 and a connecting bolt 113.

The heat transfer tubes 104 are attached to the tube plates 102 and 116 at the left and right ends thereof, and there are a plurality of partition walls 105 on the heat transfer tubes 104, and the partition walls 105 are the partition walls 25 of FIG. 3. As it has a plurality of holes, the heat pipe 104 is inserted into this hole. The headers 116, 117, and 119 are connected to the tube plates 102 and 116, and the refrigerant inlet and outlet headers 116 and 117 are connected to the plate plate 115, the tube plate 116 and the plate plate blocking flange 106. The inlet and outlet headers 116 and 117 are divided by the refrigerant path separating plate 108, and the attachment form of the hard plate flange 114 and the hard plate flange 106 is fastened to the bolt 113 in FIG. The flange connection form 1100 or the welding connection form 1300 of FIG. 6 may be assembled by directly welding the plate 165 to the tube plate 166, and the refrigerant plate connected to the inlet header 116 may be installed in the plate blocking flange 106. An inlet 110 is attached, and a refrigerant outlet 109 is attached to the hard plate blocking flange 106 at the outlet header 117.

In addition, the intermediate header 119 is composed of a hard plate 107, a tube plate 42, a hard plate flange 120 and a hard plate blocking flange 120, the hard plate blocking flange 120 bolts 113 to the hard plate flange 118 As a fastening form, as shown in FIG. 5, the flange connection form 1200 or the welding connection form 1400 of FIG. 6 may be assembled by directly installing the hard plate 157 on the tube plate 152.

In addition, the shape of the hard plates (107, 115, 157, 165) can be produced in a variety of forms, such as hemispherical or square or cylindrical.

The flow of the heat fluid and the refrigerant of the heat exchanger according to FIGS. 5 and 6 will be described separately for use as an evaporator and a condenser.

First, the flow of the refrigerant when used as an evaporator flows into the inlet header 116 through the refrigerant inlet 110 and is uniformly distributed to the heat transfer tube 104, and is introduced again from the intermediate header 119 to the heat transfer tube 104. And is discharged to the outlet header 117 and the refrigerant outlet 109. At this time, the refrigerant is changed from the liquid state to the gas state by heat exchange with the heat fluid (water) inside the shell (101) in the heat transfer tube 104, the heat fluid inside the shell (101) Cool down. In addition, the thermal fluid inside the shell 101 enters the thermal fluid inlet 111 and is changed in direction by the partition wall 105, and is cooled by heat exchange with a refrigerant inside the heat pipe 104. Is discharged to the outlet 112.

The flow of the refrigerant when used as a condenser is in the opposite direction as when used as the evaporator and is uniformly distributed to the heat pipes 104 by entering the outlet header 117 through the refrigerant outlet 109 and the intermediate header 119. In the heat transfer tube 104 again, the inlet header 116 and the refrigerant inlet 110 are discharged, and the refrigerant outlet 109, the outlet header 117, the refrigerant inlet 110 and the inlet header 116 are It is opposite to the flow of the refrigerant in the evaporator, the heat transfer tube 104 and the tube plate 102 by the expansion and contraction process by the thermal expansion of the heat transfer tube 104 by the high temperature and high pressure refrigerant inside the heat transfer tube 104, Damage to the connection portion of the 116 and the like can be absorbed thermal stress because the tube plate 102 is fluid in a form that is not fixed inside the shell (101).

At this time, the refrigerant is exchanged with the heat fluid (water) inside the shell (101) in the heat transfer tube 104 to change from a gas state of high temperature and high pressure to a liquid state, the inside of the shell (101) The heat fluid. In addition, the thermal fluid inside the shell 101 enters the thermal fluid inlet 111 and is changed in direction by the partition wall 105, and is heated and exchanged with a refrigerant inside the heat pipe 104. Is discharged to the outlet 112.

The heat exchanger of FIG. 5 removes the bolt 113 connecting the shell flange 103 and the tube plate flange 116 to remove the contaminants of the heat transfer tube 104. It can be cleaned in an open form.

In addition, the heat exchanger of FIG. 6 removes the bolt 113 connecting the shell flange 153 and the tube plate flange 166 when the contaminants of the heat transfer tube 154 are removed. ) Can be cleaned in an open form.

The heat exchanger form of the flange connection form (1100, 1200) and welding connection form (1300, 1400) of Figure 5 can also be produced in a mixed form, in this case the flange connection form (1100) and weld connection form (1400) or It is manufactured in the form of welding connection form (1300) and flange connection form (1200).

Therefore, the heat recovery from the contaminated heat source fluid is more effective than the conventional heat exchanger type, the heat exchanger is easy to clean, and the structure is simple, so that the source of river heat or groundwater or bathroom wastewater or domestic wastewater or various process water wastewater or As a heat exchanger such as sea water, high performance can be achieved.

As will be apparent from the foregoing description, the present invention is a system for heat exchange between a high temperature fluid and a low temperature fluid, which can be used in an open or closed type, and particularly recovers heat from fluids such as river water or sea water or domestic waste water or industrial waste water. Used for heating or heating, it is possible to reduce the manufacturing cost of heat exchanger and to remove contaminants of heat exchanger easily, and to reduce the oil consumption of oil boiler by heat recovery of various waste heat sources and natural heat sources. When using a pump, the performance improvement provides energy savings.

Claims (3)

In the form of a heat exchanger for both an evaporator and a condenser, a refrigerant flows inside the heat pipe and a shell and tube heat exchanger in which a heat fluid flows into the space between the heat pipe and the shell. The shell and tube (heat transfer tube) in the form of a structure that can be disassembled, the shell (101) each flange (shell flange) 103, thermal fluid inlet 111 and outlet ( 112 is attached, and the left and right tube plates 102 and 116 are attached to both ends of the heat transfer tube group 104, and the plate plates 115 and 107 are attached to the tube plates 102 and 116. The flanges l14 and 118 are connected to the hard plate blocking flanges 106 and 120 by the bolts 113, and the shell flanges 103 and the tube plate flanges 116 are bolted by fastening the bolts 113. Heat exchanger characterized by the above. The tube plate (102) is fixed to the end of the heat pipe (104) and moves in fluid inside the shell (101) to absorb the expansion and contraction of the heat pipe (104). Heat exchanger. The connection form of the tube plate (102, 116), the light plate (107, 115) and the hard plate blocking flange (106, 120) is a flange connection form (1100, 1200) or weld connection form (1300, 1400) or Heat exchanger characterized in that it is produced in a mixed form.

Images