JP2011051393A - Cold-storage heat exchanger and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cold-storage heat exchanger preventing leakage of a cold-storage material from the inside of cold-storage material containers and easily taking out the cold-storage material from the inside of the cold-storage material containers when abandoned. <P>SOLUTION: This cold-storage heat exchanger 1 includes: a plurality of coolant flow tubes 13; and the cold-storage material containers 14 brazed to one surface of each of the coolant flow tubes 13 and having the cold-storage material filled therein. The cold-storage material containers 14 is filled with the cold-storage material produced by gelling liquid paraffin by using gelling agent made of 12-hydroxystearic acid. The cold-storage material in the cold-storage material containers 14 is cooled by means of a cold energy of coolant passing through the coolant flow tubes 13. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a cold storage heat exchanger used for a car air conditioner of a vehicle that temporarily stops an engine that is a driving source of a compressor when the vehicle is stopped, and a method for manufacturing the same.

  In this specification and claims, the term “liquid paraffin” is intended to mean a paraffinic hydrocarbon that is liquid at room temperature and atmospheric pressure. “Normal temperature” means 20 ± 15 ° C. defined in JIS Z8703.

  In recent years, automobiles have been proposed that automatically stop the engine when the vehicle stops, such as when waiting for a signal, for the purpose of environmental protection or improvement in automobile fuel efficiency.

  By the way, in a normal car air conditioner, when the engine is stopped, the compressor using the engine as a driving source stops, so that the refrigerant is not supplied to the evaporator, and the cooling capacity is rapidly reduced.

  Therefore, in order to solve such a problem, a plurality of refrigerant circulation pipe portions through which the refrigerant flows and a plurality of cool storage material containers in which the cool storage material is enclosed are provided, and the cool storage material in the cool storage material container is a coolant. A car air conditioner using a cold storage heat exchanger that is cooled by the cold heat of the refrigerant flowing in the circulation pipe portion is considered. In the car air conditioner, when the compressor is operating, the low-pressure gas-liquid mixed phase two-phase refrigerant compressed by the compressor and cooled by the refrigerant cooler and decompressed by the decompressor is stored in the cold storage heat. By evaporating while flowing through the refrigerant flow pipe part of the exchanger, the passenger compartment is cooled, and further, the cold storage material in the cold storage material container is cooled by the cold heat of the refrigerant flowing in the refrigerant flow pipe part, and the compressor When the vehicle stops, the vehicle interior is cooled using the cold energy stored in the cold storage material in the cold storage material container of the cold storage heat exchanger (see Patent Document 1).

  In the regenerator heat exchanger described in Patent Document 1, decanol and tetradecane are used as the regenerator material enclosed in the regenerator material container, but these regenerator materials are liquid at room temperature, and for some reason. If the cool storage material leaks from the cool storage material container, there is a risk of burning, which is dangerous.

  Moreover, the gel-like thing obtained by the chemical reaction is also known as a general cold storage material. However, since the gel-like regenerator material by such a chemical reaction cannot be fluidized again, when enclosed in the regenerator container of the regenerator heat exchanger as described above, when the regenerator heat exchanger is discarded. It is extremely difficult to take out the regenerator material from the regenerator container.

Japanese Patent No. 4043776

  The object of the present invention is to solve the above-mentioned problems, prevent leakage of the regenerator material from the regenerator material container, and easily store the regenerator material from the regenerator material container at the time of disposal. It is in providing an exchanger and its manufacturing method.

  In order to achieve the above object, the present invention comprises the following aspects.

1) It has a plurality of refrigerant flow pipe parts through which refrigerant flows and a cold storage material container in which a cold storage material is enclosed, and the cold storage material in the cold storage material container is cooled by the cold heat of the refrigerant flowing in the refrigerant flow pipe part. In the cold storage heat exchanger designed to
A cold storage heat exchanger in which a cold storage material obtained by gelling liquid paraffin using a gelling agent made of 12-hydroxystearic acid is enclosed in a cold storage material container.

  2) The cold storage heat exchanger according to 1) above, wherein the content of 12-hydroxystearic acid in the cold storage material is 2 to 20% by mass with the cold storage material being 100% by mass.

  3) The regenerative heat exchanger according to 1) or 2), wherein the regenerator material is blended so that particles made of a heat conductive material are dispersed throughout.

  4) The cold storage heat exchanger according to 3) above, wherein the amount of the granular material is 20 to 50 parts by weight with respect to 100 parts by weight of the cold storage material.

5) It has a plurality of refrigerant flow pipe parts through which the refrigerant flows and a cold storage material container in which the cold storage material is enclosed, and the cold storage material in the cold storage material container is cooled by the cold heat of the refrigerant flowing in the refrigerant flow pipe part. A method of manufacturing a regenerator heat exchanger adapted to comprise:
A composition comprising liquid paraffin and 12-hydroxystearic acid as a gelling agent is heated to a temperature equal to or higher than the melting point of 12-hydroxystearic acid, placed in a cold storage container, and then cooled to room temperature to gel the liquid paraffin. The manufacturing method of the cool storage heat exchanger including making a cool storage material and enclosing the cool storage material in the cool storage material container.

6) It has a plurality of refrigerant flow pipe parts through which the refrigerant flows and a cold storage material container in which the cold storage material is enclosed, and the cold storage material in the cold storage material container is cooled by the cold heat of the refrigerant flowing in the refrigerant flow pipe part. A method of manufacturing a regenerator heat exchanger adapted to comprise:
A liquid paraffin and a gel composition containing 12-hydroxystearic acid as a gelling agent are placed in a cold storage container, heated to a temperature equal to or higher than the melting point of 12-hydroxystearic acid, and then cooled to room temperature to gel the liquid paraffin. The manufacturing method of the cool storage heat exchanger including making the cool storage material into a cold storage material and enclosing the cool storage material in the cool storage material container.

  7) The method for producing a regenerative heat exchanger according to the above 5) or 6), wherein the content of 12-hydroxystearic acid in the composition is 2 to 20% by mass with the composition as 100% by mass.

  8) The method for producing a regenerative heat exchanger according to any one of 5) to 7) above, wherein a granule made of a heat conductive material is blended in the composition so as to be dispersed throughout.

  9) The regenerative heat exchanger according to 8), wherein the amount of the granular material is 20 to 50 parts by weight with respect to 100 parts by weight of the composition.

  According to the cold storage heat exchanger of 1), since the cold storage material obtained by gelling liquid paraffin using a gelling agent made of 12-hydroxystearic acid is enclosed in the cold storage material container, the cold storage material container Leakage of the regenerator material from the inside can be prevented. And if it heats to about 80 degreeC exceeding the melting | fusing point of 12-hydroxystearic acid in a cool storage material, a cool storage material can be completely reflowed. Therefore, when the cool storage heat exchanger is discarded, the cool storage material can be easily taken out from the cool storage material container.

  According to the cold storage heat exchanger of 2) above, since the content of 12-hydroxystearic acid in the cold storage material is 2 to 20% by mass with the cold storage material being 100% by mass, a sufficient cold storage effect is secured. Above, the whole cold storage material can be completely gelled. Moreover, the temperature at which the gelled regenerator material completely reflows can be maintained at a relatively high temperature.

  According to the cold storage heat exchanger of 3) above, since the granular material made of the heat conductive material is blended so as to be dispersed throughout the cold storage material, the heat transfer performance of the cold storage material is improved, and the cold storage material The efficiency at the time of storing cold heat and releasing the cold heat stored in the cold storage material is improved. In addition, since the cool storage material is gelatinized, it becomes possible to mix | blend the granular material which consists of heat conductive materials in a cool storage material so that it may disperse | distribute to the whole.

  According to the cold storage heat exchanger of the above 4), the heat transfer performance can be effectively improved while ensuring a sufficient cold storage effect of the cold storage material.

  According to the manufacturing method of the regenerator heat exchanger of the above 5) and 6), leakage of the regenerator material from the inside of the regenerator container in the manufactured regenerator heat exchanger can be prevented. And if it heats to about 80 degreeC exceeding the melting | fusing point of 12-hydroxystearic acid in a cool storage material, a cool storage material can be completely reflowed. Therefore, when the cool storage heat exchanger is discarded, the cool storage material can be easily taken out from the cool storage material container.

  According to the manufacturing method of the regenerator heat exchanger of the above 7), the entire regenerator material can be completely gelled while ensuring a sufficient regenerator effect of the regenerator material of the manufactured regenerator heat exchanger. Moreover, the temperature at which the gelled regenerator material completely reflows can be maintained at a relatively high temperature.

  According to the manufacturing method of the regenerator heat exchanger of the above 8), the heat transfer performance of the regenerator material of the manufactured regenerator heat exchanger is improved, and when storing the cold energy in the regenerator material, and the cold energy stored in the regenerator material The efficiency at the time of releasing is improved. In addition, since the cool storage material is gelatinized, it becomes possible to mix | blend the granular material which consists of heat conductive materials in a cool storage material so that it may disperse | distribute to the whole.

  According to the method for manufacturing a cold storage heat exchanger of 9) above, it is possible to effectively improve the heat conduction performance while ensuring a sufficient cold storage effect of the cold storage material of the manufactured cold storage heat exchanger.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. It is the AA line expanded sectional view which abbreviate | omitted a part of FIG. FIG. 3 is an enlarged sectional view taken along line B-B in FIG. 2. FIG. 3 is an enlarged sectional view taken along the line CC in FIG. 2. It is a perspective view which shows the some cool storage material container integrated. It is a disassembled perspective view which shows one cool storage material container. It is a graph which shows the relationship between content of 12-hydroxystearic acid as a gelatinizer in the cool storage material enclosed in a cool storage material container, and the heat of fusion at the time of defrosting the frozen cool storage material.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the following description, the downstream side in the ventilation direction (the direction indicated by the arrow X in FIGS. 1 to 4) is the front, and the opposite side is the rear. In addition, it is assumed that the upper and lower sides and the left and right sides in FIG.

  In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

  FIG. 1 shows the overall configuration of a regenerative heat exchanger according to the present invention, and FIGS.

  1 and 2, the regenerator heat exchanger (1) includes an aluminum first header tank (2) and an aluminum second header tank (3) extending in the horizontal direction and spaced apart in the vertical direction. And a heat exchange core portion (4) provided between the header tanks (2) and (3).

  The first header tank (2) is integrated with the refrigerant inlet header (5) located on the front side (downstream in the ventilation direction) and the refrigerant inlet header (5) located on the rear side (upstream in the ventilation direction). And a refrigerant outlet header portion (6). A refrigerant inlet (7) is provided at the right end of the refrigerant inlet header (5), and a refrigerant outlet (8) is provided at the right end of the refrigerant outlet header (6). The second header tank (3) includes a first intermediate header portion (9) located on the front side and a second intermediate header portion (11) located on the rear side and integrated with the first intermediate header portion (9). And. The first intermediate header portion (9) and the second intermediate header portion (11) of the second header tank (3) are joined across the right end portions of the intermediate header portions (9) and (11), and The inside is communicated via a communication member (12) that forms a passage.

  As shown in FIG. 1 to FIG. 4, the heat exchange core part (4) is made of a plurality of, two aluminum extruded sections, with the width direction facing in the front-rear direction and spaced in the front-rear direction. The flat refrigerant flow pipe (13) (refrigerant flow pipe section) and the width direction thereof are directed in the front-rear direction, and both refrigerants are brought into contact so as to straddle one side of the front and rear refrigerant flow pipes (13), here the left side. A plurality of sets (15) of flat aluminum cold storage containers (14) brazed to the flow pipe (13) and filled with a cold storage material (not shown) are arranged at intervals in the left-right direction. Has been. The upper end of the front refrigerant flow pipe (13) is connected to the refrigerant inlet header (5), and the lower end is connected to the first intermediate header (9). The upper end of the rear refrigerant flow pipe (13) is connected to the refrigerant outlet header (6), and the lower end is connected to the second intermediate header (11). The gap between adjacent ones of the refrigerant circulation pipe (13) and the cool storage material container (14) (15) is a ventilation gap (16), and an aluminum corrugated fin (17) is provided in the ventilation gap (16). Is disposed and brazed to the refrigerant flow pipe (13) and the cold storage material container (14). In addition, aluminum corrugated fins (17) are also arranged outside the ones located at the left and right ends of the set (15) consisting of the refrigerant flow pipe (13) and the cold storage container (14), and the corrugated fins (17 ) Is brazed over both the front and rear refrigerant flow pipes (13), and the corrugated fin (17) at the left end is brazed to the cold storage material container (14). Aluminum side plates (18) are disposed outside the corrugated fins (17) at the left and right ends, and are brazed to the corrugated fins (17).

  As shown in FIGS. 3 to 5, the front portion of the cool storage material container (14) is protruded forward from the front coolant circulation pipe (13), and the front coolant circulation in the cool storage material container (14). In the portion protruding forward from the pipe (13), the container height which is the dimension in the thickness direction (left-right direction) of the cold storage container (14) is the other part, that is, the front side of the refrigerant circulation pipe (13) on the front side. An internal volume increasing portion (22) is provided which is higher than the container height of the container main body (21) located behind the edge. The container height of the internal volume increasing part (22) is equal to the pipe height (pipe part height) which is the dimension in the thickness direction of the refrigerant flow pipe (13), and the container body part (21) of the regenerator container (14). It is equal to the height of the container plus the height. The upper and lower ends of the internal volume increasing portion (22) of the cold storage material container (14) protrude outward in the vertical direction, and the protruding tank forming portion (23) bulging outward in the left-right direction is formed on the protruding portion. Is provided. The tank forming portions (23) of the internal volume increasing portions (22) of the adjacent cool storage material containers (14) are brazed to each other, whereby all the cool storage material containers (14) are integrated. Further, the inside of the tank forming portion (23) of the inner volume increasing portion (22) of the adjacent cold storage material container (14) has a communication hole (24) formed in the bulging end wall of the tank forming portion (23). Is communicated through. The upper and lower tank forming portions (23) of the inner volume increasing portion (22) of all the regenerator containers (14) form the upper and lower communication tanks (25), and all the regenerator containers (14) The inside communicates with the upper and lower communication tanks (25). Although not shown in the figure, a regenerator filling port is formed in one of the upper and lower communication tanks (25), and an air vent is formed in the other, and all the regenerator containers are formed through the regenerator filling port. (14) The cold storage material is filled inside.

  As shown in FIG. 6, the cool storage material container (14) is composed of two vertical rectangular aluminum plates (26) and (27) whose peripheral portions are brazed to each other. All the aluminum plates (26) and (27) are made of an aluminum brazing sheet having a brazing filler metal layer on both sides, and the outer shapes viewed from both the left and right sides are the same. The left aluminum plate (26) constituting the regenerator container (14) occupies most of the portion excluding the front side portion, and forms a first bulge portion for forming the container body portion (21) bulged to the left ( 28) and a first bulge for forming an internal volume increasing portion (22) connected to the front side of the first bulging portion (28) and bulging to the left and having the same bulging height as the first bulging portion (28). Two bulges (29) and a tank formed at the upper and lower ends of the second bulge (29) and bulging to the left and having a higher bulge than the second bulge (29) And a third bulging portion (31) for forming the portion (23). A communication hole (24) is formed in the bulging end wall of the third bulging portion (31) in the left aluminum plate (26) constituting the cold storage material container (14) excluding the leftmost cold storage material container (14). Yes. The right aluminum plate (27) constituting the cold storage material container (14) includes a flat part (32) for forming the container body part (21) that occupies most of the front part, and the front side of the flat part (32). And a first bulging portion (33) for forming an inner volume increasing portion (22) that bulges to the right and the upper and lower ends of the first bulging portion (33) and bulges to the right. And a second bulging portion (34) for forming a tank forming portion (23) having a bulging height higher than that of the first bulging portion (33). A communication hole (24) is formed in the bulging end wall of the second bulging portion (34) in the right aluminum plate (27) constituting the cold storage material container (14) excluding the rightmost cold storage material container (14). Yes. Then, the two aluminum plates (26) and (27) are brazed in combination so that the openings of the bulging portions (28), (29), (31), (33), and (34) face each other. A material container (14) is formed. The tank forming portions (23) of two adjacent cool storage material containers (14) are mutually connected so that the communication holes (24) of the third bulging portion (31) and the second bulging portion (34) communicate with each other. It is brazed.

  The front portion of the corrugated fin (17) protrudes forward from the front refrigerant flow tube (13), and the front refrigerant flow tube in the corrugated fin (17) excluding the corrugated fins (17) at both left and right ends. Portions protruding forward from (13) are brazed to the left and right side surfaces of the internal volume increasing portion (22) of the cold storage material container (14) located on the left and right sides. Further, the portion of the corrugated fin (17) located at the left end that protrudes forward from the front refrigerant flow pipe (13) is the left side surface of the internal volume increasing portion (22) of the regenerator container (14) located on the right side. The portion of the corrugated fin (17) that is brazed to the front and protrudes forward from the front refrigerant flow pipe (13) is the inner volume increasing portion (22) of the regenerator container (14) located on the left side. Is brazed to the right side of

  As the cold storage material, a material obtained by gelling liquid paraffin using a gelling agent made of 12-hydroxystearic acid is used. As the liquid paraffin, hexadecane, pentadecane, and tetradecane are preferably used, and these are used alone or in admixture of two or more. The cold storage material is prepared by heating a composition comprising liquid paraffin and 12-hydroxystearic acid as a gelling agent to a temperature equal to or higher than the melting point of 12-hydroxystearic acid and then cooling to room temperature. Is absorbed, and as a result, liquid paraffin is gelled.

  The content of 12-hydroxystearic acid in the cold storage material is preferably 2 to 20% by mass, and preferably 2 to 10% by mass with respect to 100% by mass of the cold storage material. If the content of 12-hydroxystearic acid in the regenerator is too small, the entire regenerator may not be completely gelled and liquid paraffin may remain, and the gelated regenerator completely reflows. If the temperature drops too much, on the contrary, if it is too much, there is a possibility that a sufficient cold storage effect cannot be obtained.

  Moreover, it is preferable to mix | blend the granular material which consists of heat conductive materials in a cool storage material so that the whole may disperse | distribute. It is preferable that the compounding quantity of the granular material which consists of heat conductive materials is 20-50 weight part with respect to 100 weight part of cool storage materials. In this case, the heat conduction performance of the cold storage material is improved, and the efficiency at the time of storing cold heat in the cold storage material and releasing the cold heat stored in the cold storage material is improved. In addition, since the cool storage material is gelatinized, it becomes possible to mix | blend the granular material which consists of heat conductive materials in a cool storage material so that it may disperse | distribute to the whole. Here, when there are too few compounding quantities of the granular material which consists of heat conductive materials, the heat conductive performance improvement effect of a cool storage material is not enough, and when too large, there exists a possibility that the cool storage effect of a cool storage material may fall remarkably too much. As the granular material made of a heat conductive material, for example, particles or powder made of metal such as aluminum, copper (including copper alloy), iron (including iron alloy), or particles or powder made of carbon are used.

  Enclosure of the regenerator material in the regenerator container (14) when the regenerator heat exchanger (1) is manufactured is performed by the following method. That is, a composition in which a predetermined amount of 12-hydroxystearic acid is contained in liquid paraffin composed of at least one of hexadecane, pentadecane, and tetradecane under normal atmospheric pressure is obtained. The composition is a liquid. In addition, you may mix | blend the granule which consists of heat conductive materials in the said composition, and may disperse | distribute it to the whole. Next, the composition is heated to a temperature equal to or higher than the melting point of 12-hydroxystearic acid and then put into all the regenerator containers (14) through the regenerator filling port. Next, by cooling the composition to room temperature, the liquid paraffin is gelled to obtain a cold storage material. Thereafter, the regenerator filling port and the air vent port are closed by appropriate means (not shown). Thus, the gelled cold storage material is enclosed in the cold storage material container (14).

  The enclosure of the regenerator material in the regenerator material container (14) when the regenerator heat exchanger (1) is manufactured is also performed by the following method. That is, a composition in which a predetermined amount of 12-hydroxystearic acid is contained in liquid paraffin composed of at least one of hexadecane, pentadecane, and tetradecane under normal atmospheric pressure is obtained. The composition is a liquid. In addition, you may mix | blend the granule which consists of heat conductive materials in the said composition, and may disperse | distribute it to the whole. Next, the composition is put into all the regenerator containers (14) through the regenerator filling port. Next, the regenerator heat exchanger (1) is heated so that the temperature of the composition is equal to or higher than the melting point of 12-hydroxystearic acid, and then cooled to room temperature to gel the liquid paraffin to obtain a regenerator material. . Thereafter, the regenerator filling port and the air vent port are closed by appropriate means (not shown). Thus, the gelled cold storage material is enclosed in the cold storage material container (14).

  In the two methods described above, the amount of the cold storage material filled in the cold storage material container (14) is preferably set to an amount that fills the entire cold storage material container (14) up to the upper end.

  The above-described regenerative heat exchanger (1) includes a compressor that uses a vehicle engine as a drive source, a condenser that cools the refrigerant discharged from the compressor (refrigerant cooler), and an expansion valve that decompresses the refrigerant that has passed through the condenser ( Car air conditioner is configured with a decompressor. In the car air conditioner, when the compressor is operating, the low-pressure gas-liquid mixed-phase two-phase refrigerant compressed by the compressor and passed through the condenser and the expansion valve passes through the refrigerant inlet (7) to store cold heat. It enters into the inlet header part (5) of the exchanger (1) and flows into the first intermediate header part (9) through the front all refrigerant circulation pipe (13). The refrigerant that has entered the first intermediate header portion (9) passes through the communication member (12), enters the second intermediate header portion (11), and then passes through the rear refrigerant flow pipe (13). It flows into the outlet header (6) and flows out from the refrigerant outlet (8). Then, while the refrigerant flows through the refrigerant flow pipe (13), heat exchange is performed with the air passing through the ventilation gap (16), and the refrigerant flows out as a gas phase.

  At this time, the cool storage material in the container body (21) of the cool storage material container (14) is cooled by the coolant flowing in the refrigerant flow pipes (13) on both sides, and is cooled by the coolant through the ventilation gap (16). The cool storage material in the internal volume increasing part (22) of the cool storage material container (14) is cooled by the air thus formed, and as a result, the cool storage material is frozen and cold energy is stored.

  When the compressor stops, the cold heat of the cool storage material in the container main body (21) of the cool storage material container (14) is transferred from the left side of the container main body (21) to the left side of the cool storage material container (14). It is transmitted to the air passing through the ventilation gap (16) through the corrugated fin (17) brazed to the refrigerant, and the refrigerant flow pipe (13) and the refrigerant flow pipe ( It is transmitted to the air passing through the ventilation gap (16) through the corrugated fin (17) brazed to 13), and the regenerator material is thawed. Also, the cold heat of the regenerator material in the internal volume increasing portion (22) of the regenerator container (14) will be transferred from the left and right side surfaces of the internal volume increasing portion (22) to the left and right side surfaces of the internal volume increasing portion (22). It is transmitted to the air passing through the ventilation gap (16) through the attached corrugated fin (17), and the cold storage material is thawed. Therefore, even if the temperature of the wind that has passed through the evaporator (1) rises, the wind is cooled, so that a rapid decrease in the cooling capacity is prevented.

  When disposing of the regenerator heat exchanger (1), heat the regenerator heat exchanger (1) to about 80 ° C where the temperature of the regenerator material exceeds the melting point of 12-hydroxystearic acid. Next, after the liquid paraffin reflowed by opening the regenerator filling port and the air vent port to flow out from the regenerator filling port, the regenerator heat exchanger (1) is discarded.

  For reference, the relationship between the content of 12-hydroxystearic acid in the gelled cold storage material and the heat of solidification when freezing the cold storage material and the heat of fusion when thawing the frozen cold storage material is obtained. It was. That is, as liquid paraffin, what consists of tetradecane: 15 mass% and hexadecane: 85 mass% is used, The composition which consists of the said liquid paraffin and 12-hydroxy stearic acid as a gelatinizer is 12-hydroxy stearic acid. A gelled regenerator material was obtained by heating to above the melting point and cooling to room temperature. And when changing the content of 12-hydroxystearic acid when the regenerator material is 100% by mass, the content of 12-hydroxystearic acid in the gelled regenerator material and freezing the regenerator material The relationship between the heat of solidification and the heat of fusion when thawing a frozen cold storage material was determined.

Table 1 shows the relationship between the content of 12-hydroxystearic acid in the cold storage material, the heat of solidification when the cold storage material is frozen, and the heat of fusion when the frozen cold storage material is thawed. Moreover, the relationship between content of 12-hydroxystearic acid in a cool storage material and the heat of fusion at the time of defrosting the frozen cool storage material is shown in FIG.

  Table 1 shows solidification heat when freezing liquid paraffin (content of 12-hydroxystearic acid: 0) composed of tetradecane: 15% by mass and hexadecane: 85% by mass, and after freezing the liquid paraffin The ratio when the heat of fusion at the time of thawing is 100 is shown.

  Further, the relationship between the content of 12-hydroxystearic acid in the gelled regenerator and the temperature at which the regenerator completely reflows was determined. That is, the gelled regenerator material obtained as described above was heated at 50 ° C. to 5 ° C. intervals for 15 minutes, and the fluidization state of the regenerator material was observed. As a result, when the content is 0.5% by mass or less, it fluidizes at 55 ° C., when the content is 0.5 to 1.0% by mass, fluidizes at 60 ° C., and 1.0 to 2.0% by mass at 65 ° C. Fluidized. Moreover, at 80 degreeC, the cool storage material fluidized by all content.

  In the above embodiment, the refrigerant flow pipe portion of the regenerator heat exchanger is a flat hollow body formed by brazing the peripheral portions with two aluminum plates facing each other, as in the case of a so-called laminated evaporator. May be provided. That is, it may be formed in a bulging shape between both aluminum plates constituting the flat hollow body.

  The cold storage heat exchanger according to the present invention is suitably used for a refrigeration cycle that constitutes a car air conditioner for a vehicle that temporarily stops an engine that is a drive source of a compressor when the vehicle is stopped.

(1): Cold storage heat exchanger
(13): Refrigerant distribution pipe (refrigerant distribution pipe)
(14): Cold storage container

Claims (9)

A plurality of refrigerant flow pipe portions through which the refrigerant flows and a cold storage material container in which the cold storage material is sealed are provided so that the cold storage material in the cold storage material container is cooled by the cold heat of the refrigerant flowing in the refrigerant flow pipe portion. In the cold storage heat exchanger
A cold storage heat exchanger in which a cold storage material obtained by gelling liquid paraffin using a gelling agent made of 12-hydroxystearic acid is enclosed in a cold storage material container. The cold storage heat exchanger according to claim 1, wherein the content of 12-hydroxystearic acid in the cold storage material is 2 to 20% by mass with the cold storage material being 100% by mass. The regenerator heat exchanger according to claim 1 or 2, wherein the regenerator material is blended so that a granular material made of a heat conductive material is dispersed throughout. The cold storage heat exchanger according to claim 3, wherein the amount of the granular material is 20 to 50 parts by weight with respect to 100 parts by weight of the cold storage material. A plurality of refrigerant flow pipe portions through which the refrigerant flows and a cold storage material container in which the cold storage material is sealed are provided so that the cold storage material in the cold storage material container is cooled by the cold heat of the refrigerant flowing in the refrigerant flow pipe portion. A method of manufacturing a cold storage heat exchanger
A composition comprising liquid paraffin and 12-hydroxystearic acid as a gelling agent is heated to a temperature equal to or higher than the melting point of 12-hydroxystearic acid, placed in a cold storage container, and then cooled to room temperature to gel the liquid paraffin. The manufacturing method of the cool storage heat exchanger including making a cool storage material and enclosing the cool storage material in the cool storage material container. A plurality of refrigerant flow pipe portions through which the refrigerant flows and a cold storage material container in which the cold storage material is sealed are provided so that the cold storage material in the cold storage material container is cooled by the cold heat of the refrigerant flowing in the refrigerant flow pipe portion. A method of manufacturing a cold storage heat exchanger
A liquid paraffin and a gel composition containing 12-hydroxystearic acid as a gelling agent are placed in a cold storage container, heated to a temperature equal to or higher than the melting point of 12-hydroxystearic acid, and then cooled to room temperature to gel the liquid paraffin. The manufacturing method of the cool storage heat exchanger including making the cool storage material into a cold storage material and enclosing the cool storage material in the cool storage material container. The method for producing a regenerative heat exchanger according to claim 5 or 6, wherein the content of 12-hydroxystearic acid in the composition is 2 to 20% by mass with 100% by mass of the composition. The manufacturing method of the cool storage heat exchanger in any one of Claims 5-7 which mix | blends the granular material which consists of heat conductive materials in the said composition so that it may disperse | distribute to the whole. The regenerative heat exchanger according to claim 8, wherein the amount of the granule is 20 to 50 parts by weight with respect to 100 parts by weight of the composition.

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