JP3583830B2 - Refrigerant heater - Google Patents

Description

[0001]
[Industrial applications]
The present invention provides cooling and heating in which the refrigerant circulating in the refrigeration cycle is heated during heating and flows to the indoor heat exchanger by bypassing the outdoor heat exchanger and the decompression device to obtain the heating capacity. The present invention relates to a refrigerant heater mounted on a possible air conditioner for heating the refrigerant.
[0002]
[Prior art]
This type of air conditioner, which performs a heating operation by a refrigerant heating type, has a refrigerant heater for heating the refrigerant as shown in, for example, Japanese Utility Model Publication No. 2-18460, in which the indoor heat of the refrigeration cycle is provided. The refrigerant heater is disposed between the exchanger and the accumulator.The refrigerant heater attaches a gas burner or an oil burner as a heating means and a refrigerant pipe through which a refrigerant as a medium to be heated passes to a surface side and burns inward. A passage through which air flows is formed, and the heat exchanger is a heat exchanger that transfers heat of combustion to the refrigerant pipe by a number of fins arranged in parallel on the inner surface of the passage.
[0003]
Here, FIGS. 6 and 7 show general views of an example of the refrigerant heater 10 generally used in the related art. Indirect refrigerant heating unit 10 and the combustion device 2 comprises a gas burner as a heating means for heating the refrigerant, and attach the refrigerant pipe 3, the refrigerant flowing the refrigerant pipe 3 through the use of combustion heat The main component is a heat exchanger 4 that is to be electrically heated.
[0004]
The combustion device 2 includes a combustion blower 5 at a lower portion, and a burner 7 is incorporated in a horizontally long box-shaped housing 6 serving as a cover of the combustion device 2.
[0005]
The burner 7 of the embodiment is a petroleum burner in which kerosene is fed from a kerosene tank (not shown) through a kerosene port 8 and burns. Needless to say, an appropriate burner such as a gas burner is not limited to the petroleum burner. The housing 6 is formed of an iron plate.
[0006]
On the other hand, the heat exchanger 4 is connected to an upper portion of the housing 6 of the combustion device 2. Reference numeral 9 denotes a case of the heat exchanger 4, and the case 9 takes in a combustion fluid (combustion air) generated by the combustion device 2 from below and exhausts the gas through an exhaust port 11 formed on the front surface of the upper end. It is formed by extrusion using a metal material, for example, an aluminum material so as to form the passage 12 having a rectangular shape.
[0007]
The refrigerant pipes 3 are attached in a meandering manner to the outer surface of the case body 9, that is, to the wide front and rear surfaces. Accordingly, the heat exchanger performs heat exchange such that the combustion air flows through the passage 12 of the casing 9 and the heat is transmitted to the refrigerant pipe 3 so that the refrigerant flowing through the refrigerant pipe 3 is heated. It has become. Further, a tube supporting portion 16 having a receiving groove so as to be able to hold the refrigerant tube 3 by fitting the straight tube portion 3a of the refrigerant tube 3 is integrally formed in the case body 9 of the heat exchanger 4. At the same time, the refrigerant pipe 3 has a refrigerant inlet 17a and a refrigerant outlet 17b both positioned below, the refrigerant inlet 17a is connected to a not-shown indoor heat exchanger by piping, and the refrigerant outlet 17b is connected to a not-shown accumulator by piping. The heated refrigerant is allowed to flow into the compressor.
[0008]
By the way, in the above-described refrigerant heater 10, the conventional heat exchanger 4 and the combustion device 2 incorporating the burner 7 are separately assembled, and the lower portion of the heat exchanger 4 is joined to the upper portion of the combustion device 2. It was structured to be assembled. Therefore, mounting flanges 19a and 19b for joining are formed at the lower portion of the heat exchanger 4 and the upper portion of the combustion device 2, respectively. At the time of assembly, the packing 20 is interposed between the mounting flanges 19a and 19b. Measures were taken to prevent combustion air from leaking . Finally, an integrated refrigerant heater is manufactured by connecting the mounting flanges 19a and 19b to each other with bolts or screws.
[0009]
[Problems to be solved by the invention]
However, in the case of a conventional refrigerant heater in which such a separate heat exchanger and a combustion device are assembled and connected, there are many labor-intensive operations and steps involved in connection, and members such as packing are required. There was a problem of high cost. Further, there is a problem that the production does not progress, for example, after the assembly, a leak test of the joint is required.
[0010]
The present invention has been made in view of the above points, and improves the assemblability and reduces the number of parts by integrally forming a case body that constitutes a heat exchanger and a housing that houses a burner. It is an object of the present invention to provide a refrigerant heater capable of reducing cost, increasing productivity and reducing weight.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the refrigerant heater according to claim 1 of the present invention is interposed in a refrigeration cycle including a compressor, an outdoor heat exchanger, an expansion device, an indoor heat exchanger, and the like. In a refrigerant heater for heating a refrigerant circulating by bypassing the outdoor heat exchanger and an expansion device in a stage before sucking the refrigerant into a compressor, the refrigerant heater has a vertical type in which a passage for vertically passing a combustion fluid is formed. and the refrigerant pipe is attached to the outer surface of the device body casing has a combustion comprising a heat exchanger for heating the flowing refrigerant of the refrigerant pipe by heat exchange with the combustion fluid, a burner equipped in the lower part of the heat exchanger And a casing for housing the burner of the heat exchanger and the casing of the heat exchanger are flat in the front-rear direction by extrusion molding of an aluminum material which is a forming material of the casing. Right and left sides open The refrigerant pipes are formed on the front and rear outer surfaces of the main body case portion at a position above the portion accommodating the burner. A plurality of sets of pipe supporting portions for attaching the refrigerant pipe to meander in a direction different from the above are provided at intervals in the vertical direction of the front and rear outer surfaces.
[0012]
[0013]
[0014]
[Action]
In the refrigerant heater of the present invention configured as described above, the housing for accommodating the body case of the heat exchanger and the burner of the combustion device are formed in the front-rear direction by extrusion molding of an aluminum material that is a forming material of the housing case. The main body case has a configuration in which the main body case is integrally formed into a rectangular cylindrical shape with the left and right sides open, and a refrigerant pipe is attached to the main body case, and the left and right sides of the main body case are opened. By incorporating a burner from the part , the refrigerant heater can be almost completed, eliminating the need to connect the heat exchanger and the combustion device, which were separate parts as in the past, increasing the efficiency of production and performing it conventionally . This eliminates the need for packing at the joint between the body case of the heat exchanger and the housing of the combustion device that accommodates the burner, and can reduce the cost, such as omitting leakage inspection.
[0015]
Also, when the body case of the heat exchanger and the housing of the combustion device that houses the burner are made into a main body case part, the part that houses the burner is also a forming material of the body case that affects the ability of heating the refrigerant. Since it is made of aluminum material , heat exchange performance can be maintained high. In addition, the heat of the combustion device is conducted well from the lower part to the upper part of the main body case part, so that the temperature of the burner part can be lowered, and the safety is enhanced.
[0016]
In addition, the body case of the heat exchanger and the body of the combustion device that accommodates the burner are integrated into a main body case made of aluminum, which is a material for forming the body case, so that heat exchange performance and heating of the refrigerant can be achieved. The ability can be improved and the weight can be reduced. In addition, the main body case has a tube supporting portion for attaching the refrigerant tube to the front and rear outer surfaces at positions higher than the portion accommodating the burner so that the refrigerant tube meanders in a direction different from the flow direction of the combustion fluid. However, since a plurality of sets are projected from the front and rear outer surfaces at an interval in the vertical direction, the refrigerant pipes can be easily assembled to the main body case portion, and the heat exchange performance between the combustion fluid and the refrigerant is good.
[0017]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same or equivalent components as those of the conventional device described with reference to FIGS. 6 and 7 are denoted by the same reference numerals.
[0018]
FIG. 1 is a system diagram of an air conditioner that cools and heats a room. An indoor unit 21 installed in a room and an outdoor unit 22 installed outdoors are connected by a refrigerant pipe 23. The indoor unit 21 is provided with an indoor side heat exchanger 24 and a blower fan 25 therein, and the blower fan 25 exchanges heat in the indoor air sucked from the front inlet port 26a with the heat exchanger 24, and the heat exchange air Is discharged into the room through an outlet 26b formed at the bottom.
[0019]
The outdoor unit 22 houses a compressor 27, an outdoor heat exchanger 28, a throttle device 29, an accumulator 30 as a gas-liquid separator, a four-way switching valve 31, a refrigerant heater 10, and the like in its main body 22A. The four-way switching valve 31 performs a switching operation between cooling and heating. During cooling, a passage indicated by a solid arrow is provided, and the refrigerant discharged from the compressor 27 is discharged from the four-way switching valve 30 → the outdoor heat exchanger 28 → the expansion device 29. → A check valve 32 → the indoor heat exchanger 24 → the four-way switching valve 31 → the accumulator 30 → a cooling cycle is formed to circulate with the compressor 27, and the liquid refrigerant evaporates in the indoor heat exchanger 24 to perform cooling. At the time of heating, the passage indicated by a broken line arrow becomes the path indicated by the broken line arrow, and the refrigerant discharged from the compressor 27 is a four-way switching valve 31 → the indoor heat exchanger 24 → the solenoid valve 34 of the bypass circuit 33, and the refrigerant pipe in the heat exchanger of the refrigerant heater 10. A heating cycle that circulates from 3 → four-way switching valve 31 → accumulator 30 → compressor 27 is formed, and the refrigerant heated by refrigerant heater 10 radiates heat in indoor heat exchanger 24 to perform heating.
[0020]
As shown in FIG. 2, a condensing unit including a compressor (not shown), an outdoor heat exchanger 28 , a heat exchanger cooling fan 35, and the like are provided in the main body of the outdoor unit 22. A refrigerant heater 10 is provided in parallel with the condensing unit. In the present invention, as shown in FIGS. 3 to 5, the main body of the refrigerant heater 10 includes a vertical case body of a conventional heat exchanger and a housing 6 of a burner (combustion device). The main body case portion 40 is formed integrally. That is, as can be understood from FIG. 5 and the like, the main body case portion 40 has a rectangular cylindrical shape having a width B and a vertical dimension C (substantially longer than the width) and a space width A with left and right sides opened. der formations Ru. The main body case portion 40 has a rectangular tube shape that is flat in the front-rear direction, and is formed by extrusion using an aluminum material that is a forming material of a body case of a conventional heat exchanger. Things.
[0021]
Further, on the front and rear surfaces (both front and rear outer surfaces) of the main body case portion 40, in the section 41A located above the portion accommodating the burner 7 , the refrigerant pipe 3 is provided with the flow direction of the combustion gas (combustion fluid). A plurality of sets (seven sets in the embodiment shown in FIG. 5) of tube supports 16 having fitting grooves for attaching the refrigerant pipes 3 in a meandering manner so as to meander in different directions are vertically arranged at equal intervals to each other. They are integrally formed so as to protrude. Further, heat exchange fins 42 having different protruding lengths are integrally formed on the back sides of the front and rear surfaces of the main body case portion 40, respectively, and the front and rear surfaces of the lower portion where the tube support portion 16 is not formed are respectively formed. On the back side, a pair of positioning guides 43 for holding and positioning the burner 7 when the burner 7 is stored are provided one by one on the upper and lower sides. Reference numeral 44 denotes an ignition terminal, and reference numeral 45 denotes a combustion state confirmation terminal. Further, an exhaust port 11 is provided at the front of the exhaust top portion.
[0022]
Next, using the body casing portion 40, which describes how to assemble assembling the refrigerant heater 10. The burner 7 is inserted through one of the left and right side openings 40 a of the main body case 40, and is positioned and fixed by the positioning guide 43.
[0023]
On the other hand, the refrigerant pipes 3 are fitted to the pipe support parts 16 and attached to the front and rear faces of the main body case part 40 in a meandering manner. Thus, the main components of the burner 7 and the heat exchanger 4 forming the refrigerant heater 10 are assembled to the main body case 40. Then, the left and right side openings 40a of the main body case portion 40 are mounted so as to be closed by the side plates 50, 50 of separate members. Screw mounting portions 46 are provided at a plurality of locations on the side edge of the side opening of the main body case portion 40, and the side plates 50, 50 are mounted and fixed by screws screwed to the screw mounting portions 46. Thus, the main body of the refrigerant heater 10 is formed, and the combustion blower 5 is mounted below the main body, and the assembly is completed.
[0024]
Thus, when the main body casing portion 40 of the refrigerant heating apparatus formed by integrating the main body portion of the main body portion and the burner of the heat exchanger are sequentially assembled to the main body casing portion 40 of heat exchanger 4 and the burner 7 Te assembly may be Re, conventionally separately assembled have heat exchanger 4 and the burner (combustion device) 7 better without combining, reduces the number of steps it facilitates Te assembly. In addition, there is no seam between the heat exchanger 4 and the burner 7, so that the packing 20 interposed in the conventional joint is not required, and the inspection of the joint is not required.
[0025]
Further, conventionally, in iron casing 6 burner 7, the device body casing 9 of the heat exchanger because the body case 40 of the foreign material of the aluminum material, the device body of the fire heat of the burner 7 is efficiently heat exchanger 4 Although there was a concern that heat would not be transferred to the case 9, in the present invention, since the main body case portion 40 is an integral body of aluminum material, the heat conductivity is excellent and the heat exchange performance can be improved. Further, since the heat conduction from the burner 7 to the heat exchanger 4 is good, the surface temperature of the burner 7 can be reduced, the generation of an oxide film on the inner surface of the main body case portion 40 can be suppressed, and the durability is improved and the safety is improved . Can be increased. In addition, since the surface temperature of the burner 7 is lowered, the requirement for heat resistance is reduced, and a member made of a thin material can be used, and the weight can be reduced.
[0026]
Further, since there is no connection between the heat exchanger and the burner portion, the refrigerant pipe can be extended and attached to that portion, so that the heat exchange capacity can be increased.
[0027]
【The invention's effect】
Since the refrigerant heater of the present invention is configured as described above, a refrigerant tube is attached to the main body case portion, and if a burner is incorporated from the open portions on the left and right side surfaces of the main body case portion, the refrigerant heater can be substantially replaced. This eliminates the need to combine the heat exchanger and the combustion device, which were completed as separate parts as in the past. This eliminates the need for connecting the heat exchanger and the combustion device. This eliminates the need for packing at the joint with the casing of the combustion device, and can reduce the cost by, for example, omitting a leak test. In addition, when the body case of the heat exchanger and the housing of the combustion device that houses the burner are made into a main body case part, the part that houses the burner is also a forming material of the body case that affects the ability of heating the refrigerant. Since it is made of aluminum material, heat exchange performance can be maintained high. In addition, the heat of the combustion device is conducted well from the lower part to the upper part of the main body case part, so that the temperature of the burner part can be lowered, and the safety is enhanced. Further, the heat exchange performance, and the body case of the heat exchanger, which is integrated with the housing of the combustion device accommodating the burner, is made of an aluminum material which is a material for forming the case. The heating capacity of the refrigerant can be increased, and the weight can be reduced. In addition, the main body case has a tube supporting portion for attaching the refrigerant tube to the front and rear outer surfaces at positions higher than the portion accommodating the burner so that the refrigerant tube meanders in a direction different from the flow direction of the combustion fluid. However, since a plurality of sets are projected from the front and rear outer surfaces at an interval in the vertical direction, the refrigerant pipe can be easily assembled to the main body case portion, and the heat exchange performance between the combustion fluid and the refrigerant is good.
[0028]
[0029]
[0030]
[Brief description of the drawings]
FIG. 1 is a refrigeration cycle diagram of an air conditioner equipped with a refrigerant heater.
FIG. 2 is a front view of an outdoor exchanger provided with the refrigerant heater of the present invention.
FIG. 3 is a front view of a refrigerant heater provided with a main body case part in which the case part of the heat exchanger and the case part of the combustion device of the present invention are integrated.
FIG. 4 is a side view of the refrigerant heater of the present invention.
FIG. 5 is a perspective view of a main body case of the refrigerant heater of the present invention.
FIG. 6 is a front view of a refrigerant heater in which a conventional heat exchanger and a combustion device have a separate case configuration.
FIG. 7 is a side view of the conventional refrigerant heater.
[Explanation of symbols]
2 Combustion device 3 Refrigerant tube 4 Heat exchanger 6 Housing 7 Burner 9 Body case 10 Refrigerant heater
16 Tube support part 40 Body case part

Claims (1)

A refrigerant that is interposed in a refrigeration cycle including a compressor, an outdoor heat exchanger, an expansion device, an indoor heat exchanger, and the like, bypasses the outdoor heat exchanger and the expansion device during a heating operation, and circulates the refrigerant to the compressor. In a refrigerant heater that heats before the suction,
The refrigerant heater attaches a refrigerant pipe to an outer surface of a vertical case body forming a passage for vertically passing a combustion fluid, and heats a flowing refrigerant in the refrigerant pipe by heat exchange with the combustion fluid. a heat exchanger which, more together constituted a combustion apparatus comprising equipped with burners in the lower portion of the heat exchanger, a housing that houses the burner of the combustion device and the heat exchanger of the device body casing, said By extruding an aluminum material that is a forming material of the body case, a main body case part that is flat in the front-rear direction and is integrally formed into an open rectangular cylindrical shape with left and right side surfaces is formed. On both front and rear outer surfaces above the portion accommodating the burner, pipe support portions for attaching the refrigerant pipes so that the refrigerant pipes meander in a direction different from the flow direction of the combustion fluid are provided at upper and lower sides of the front and rear outer faces. Multiple sets protruding at intervals in the direction Refrigerant heating apparatus, characterized by being.

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