JP2000274881A - Liquid receiver-integrated type condenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enlarge a capacity of a liquid receiving tank without increasing a size of liquid receiver-integrated type condenser by providing the tank for communicating with one header tank by extending in a direction parallel to a lengthwise direction of a tube at an end of a core and separating a refrigerant into a gas phase refrigerant and a liquid phase refrigerant to discharge the liquid phase refrigerant. SOLUTION: The liquid receiver integrated type condenser 200 integrated with a supercooler 230, a liquid receiver 200 and a condenser 210 comprises a core 213 having a plurality of condenser tubes 211 extended in a vertical direction (top to bottom direction), and corrugated radiating fins 212 arranged between the tubes 211 to expedite heat exchanging of a refrigerant with air. Both ends of the tubes 211 are connected to upper and lower header tanks 214, 215. In this case, a liquid receiving tank 221 is extended in a direction parallel to a lengthwise direction of the tube 211 to communicate with a first header tank 214 at its upper end side. An agitator 222 for agitating the refrigerant flowing into an upper portion in the tank 221 by colliding the refrigerant with the portion is provided at the upper portion in the tank 221.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a condenser for condensing a refrigerant, and a receiver (gas-liquid) for separating a refrigerant flowing out of the condenser into a gas-phase refrigerant and a liquid-phase refrigerant and discharging the liquid-phase refrigerant. (A separator).

[0002]

2. Description of the Related Art For example, in the invention described in Japanese Patent Application Laid-Open No. Hei 5-10633, a condenser core is constituted by a plurality of tubes extending in a horizontal direction, and a liquid receiver extends in parallel (horizontally) with the tubes. By integrating the tank with the core, a condenser integrated with a receiver is constructed.

[0003]

In the receiver (liquid receiving tank), the density difference between the gaseous refrigerant and the liquid refrigerant, in other words, the gravity acting on the gaseous refrigerant and the liquid refrigerant acting on the liquid refrigerant. The two refrigerants are separated by utilizing the difference from the gravity of the refrigerant. Therefore, in order to surely separate the refrigerant into gas and liquid, the vertical dimension of the receiver (liquid receiving tank) is sufficiently ensured, and the gas-phase refrigerant existing on the upper side in the receiver (liquid receiving tank) is provided. It is necessary to prevent the gaseous refrigerant and the liquid-phase refrigerant from being mixed again with the liquid-phase refrigerant existing on the lower side and being stirred by the refrigerant flow.

On the other hand, in the invention described in the above publication, the liquid receiver (liquid receiving tank) is provided so as to extend in the horizontal direction. There is a possibility that the inside is agitated by the flow of the refrigerant in the (liquid receiving tank) and the gas-phase refrigerant and the liquid-phase refrigerant cannot be sufficiently gas-liquid separated. In the invention described in the above publication, the size of the liquid receiver (liquid receiving tank) in the vertical direction is increased in order to surely separate the gas-phase refrigerant and the liquid-phase refrigerant. In view of the above, the present invention, in which a body condenser is enlarged, has an object to surely separate a gas-phase refrigerant and a liquid-phase refrigerant while suppressing an increase in the size of a receiver-integrated condenser. .

[0005]

In order to achieve the above object, according to the present invention, a plurality of tubes (211) extending vertically while a refrigerant flows therethrough are provided. And a core portion (213) provided between the tubes (211) and having radiation fins (212) for promoting heat exchange between the refrigerant and the air, and tubes (211) at both longitudinal ends of the tube (211). A plurality of tubes (211) extending in a direction perpendicular to the longitudinal direction of the
First and second header tanks (214, 215) communicating with
And extending in the direction parallel to the longitudinal direction of the tube (211) at the end of the core (213), and
4, 215), a liquid receiving tank (22) that separates the refrigerant flowing out of the core portion (213) into a gaseous refrigerant and a liquid phase and allows the liquid-phase refrigerant to flow out.
1).

Accordingly, the liquid receiving tank (2) is provided without increasing the size of the condenser integrated with the liquid receiving tank as compared with the invention described in the above-mentioned publication in which the liquid receiving tank is provided so as to extend in the horizontal direction.
11) The vertical dimension can be enlarged. Therefore, according to the condenser integrated with a receiver according to the present invention, the gas-phase refrigerant and the liquid-phase refrigerant can be surely separated while suppressing an increase in the size of the condenser integrated with the receiver.

According to the second aspect of the present invention, the liquid receiving tank (221) is located at the upper end of the liquid receiving tank (221) and is located above the header tank (214, 215). The agitator (222) which is in communication with the liquid receiving tank (211), and in which the refrigerant flowing from the header tank (214) into the liquid receiving tank (211) collides and agitates the refrigerant. Is provided.

Accordingly, the liquid-phase refrigerant and the gas-phase refrigerant in a supercooled state can be stirred (mixed), so that both refrigerants can be thermally uniformized, and the condensation of the refrigerant can be promoted. In the invention according to claim 3, the liquid receiving tank (221)
Communicates at the lower end of the liquid receiving tank (221) with the header tank (215) located on the lower side of the two header tanks (214, 215). The inlet (211a) and the refrigerant outlet (2
11b), a turning guide member (224) for turning the flow direction of the refrigerant flowing into the liquid receiving tank (211) from the refrigerant inlet (211a) is provided.

As a result, the refrigerant flowing into the liquid receiving tank (211) does not separate into gas and liquid, and the refrigerant outlet (21)
Since it can be prevented from flowing out of the liquid receiving tank (211) from 1b), gas-liquid separation can be reliably performed. According to the fourth aspect of the present invention, there is provided a subcooler (230) for cooling the refrigerant flowing out of the liquid receiving tank (211).
14) is connected to the tube (21)
It is characterized in that it is provided at one end in the longitudinal direction of 1).

Thus, both the refrigerant outlet (202) and the refrigerant inlet (201) are located on the same side, so that the assemblability of the condenser integrated with the receiver can be improved. Incidentally, the reference numerals in parentheses of the above means are examples showing the correspondence with specific means described in the embodiments described later.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIG. 1 is a schematic view of a vehicle refrigeration cycle using a receiver-integrated condenser according to a first embodiment of the present invention. This is a compressor that draws a driving force from a compressor (not shown) to suck and compress the refrigerant.

Reference numeral 210 denotes a condenser for cooling the refrigerant flowing out of the compressor 100 with air and condensing the gas-phase refrigerant.
Reference numeral 220 denotes a receiver that separates the refrigerant flowing out of the condenser 210 into a gas-phase refrigerant and a liquid-phase refrigerant, stores excess refrigerant in the refrigeration cycle, and discharges the liquid-phase refrigerant. Reference numeral 230 denotes a subcooler (subcooler) that cools the liquid refrigerant flowing out of the receiver 220 with air to increase the degree of subcooling of the refrigerant (subcooler).
0, the liquid receiver 220 and the condenser 210 are integrated to constitute a liquid receiver integrated condenser 200 (enclosed by a dashed line) according to the present embodiment. The details of the receiver-integrated condenser 200 will be described later.

A decompressor 300 decompresses the refrigerant flowing out of the supercooler 230 (condenser 200 integrated with the receiver), and an evaporator 400 evaporates the refrigerant depressurized by the decompressor 300. The decompressor 300 is provided by the evaporator 40.
This is a temperature-type expansion valve in which the degree of pressure reduction (throttle resistance) is adjusted so that the degree of heating of the refrigerant at the outlet 0 becomes a predetermined value. Next, FIG.
A description will be given of the condenser 200 with the integrated receiver.

FIG. 2 is a cross-sectional view of the condenser 200 integrated with the liquid receiver as viewed from the direction of air flow. Reference numeral 211 denotes a plurality of condenser tubes in which the refrigerant flows and extends in the vertical direction (vertical direction). . Reference numeral 212 denotes a corrugated (corrugated) radiation fin (hereinafter, abbreviated as a fin) that is disposed between the condenser tubes 211 to promote heat exchange between the refrigerant and the air. Are configured.

Further, the condenser tube 211 is provided at one end side (upper end side in this embodiment) and the other end side (lower end side in this embodiment) of the condenser tube 211 in the longitudinal direction.
First and second header tanks 214 and 215 that extend in a direction (horizontal direction) orthogonal to the longitudinal direction of the first tube and that communicate with a plurality of condenser tubes 211 are provided.
The internal space of the first header tank 214 located at the upper end side in the longitudinal direction of the condenser tube 211 is
It is divided into three by 6a and 216b.

The first header tank 214 has three spaces (hereinafter, referred to as "spaces") formed by the separators 216a and 216b.
The first space 214a, the second space 214b, and the third space 314c are called from the right side of the paper. ), The first and second spaces 214
a and 214b communicate with the condenser tube 211, and the third space 214c communicates with a subcooler tube 231 described later.

The internal space of the second header tank 215 located at the lower end side in the longitudinal direction of the condenser tube 211 is separated into two spaces by a separator 217 (hereinafter, referred to as a first space 215a and a second space 215b from the right side of the paper). )
The first space 215a is in communication with the condenser tube 211, and the second space 215b is in communication with a subcooler tube 231 described later. .

Reference numeral 221 denotes a square pipe-shaped liquid receiving tank.
The liquid receiving tank 211 extends in a direction (vertical direction) parallel to the longitudinal direction of the condenser tube 211, and communicates with the first header tank 214 (second space 214b) at the upper end side. The upper side of the liquid receiving tank 211, the liquid receiving tank 211 and the first header tank 214 (second
Below the communication portion with the space 214b), there is provided a stirrer 222 that collides the refrigerant flowing into the liquid receiving tank 211 from the first header tank 214 to stir the refrigerant. It is a thin metal plate obtained by press-forming a large number of holes (punch metal). In the present embodiment, the liquid receiver 210 is configured by the stirring body 222 and the liquid receiving tank 211.

The stirring body 222 is provided with a liquid receiving tank 211.
By stirring (mixing) the liquid-phase refrigerant and the gas-phase refrigerant in a supercooled state by colliding the refrigerant flowing therein, the two refrigerants are thermally homogenized to promote the condensation of the refrigerant. 2
Reference numeral 31 denotes a first header tank 214 for transferring the refrigerant flowing into the second header tank 215 (the second space 215b) from the refrigerant outlet 223 formed at the lower end of the liquid receiving tank 211.
This is a subcooler tube that circulates toward the (third space 214c), and the subcooler tube 231 is provided so as to extend in the vertical direction like the condenser tube 211.

Then, the subcooler tube 231, the first
Wavy radiating fins 232 arranged between the header tank 214 (third space 214c) and the second header tank 215 (second space 215b) and the subcooler tube 231
Constitutes a subcooler 230. By the way, one end in the longitudinal direction of the first header tank 214 (the core portion 213)
A refrigerant inlet 201 connected to the discharge side of the compressor 100 and a refrigerant outlet 202 connected to the inflow side of the pressure reducer 300 are formed on the (side) side.

The two fins 212 and 332 are in contact with the side surface of the liquid receiving tank 221 perpendicular to the direction of air flow, and the liquid receiving tank 221 and the two fins 212 and
32, both tubes 211, 231 and both header tanks 2
14, 215 are integrally joined by brazing. Next, features of the present embodiment will be described.

According to the present embodiment, since the liquid receiving tank 211 is provided so as to extend in the direction (vertical direction) parallel to the longitudinal direction of the condenser tube 211, the size of the condenser 200 can be increased. Without inviting, the vertical dimension of the liquid receiving tank 211 can be increased as compared with the invention described in the above publication in which the liquid receiving tank is provided so as to extend in the horizontal direction.

Therefore, according to the condenser integrated with the receiver 200 according to the present embodiment, the gas-phase refrigerant and the liquid-phase refrigerant are reliably separated while suppressing the enlargement of the condenser with the integrated receiver 200. can do. Further, since both the refrigerant inlet 201 and the refrigerant outlet 202 are provided on the upper end side of the receiver integrated condenser 200, external piping (not shown) can be easily connected to the receiver integrated condenser 200. Can be assembled to
The mountability (assemblability) of the liquid receiver integrated condenser 200 on the vehicle can be improved.

In recent years, there has been a strong demand for space saving in an engine room. For this reason, since the condenser 210 or the liquid receiver 220 and the engine have come close to each other, the problem that the liquid receiver 220 is heated by the heat from the engine and the refrigeration capacity is reduced has been remarkable in recent years. . To solve this problem, a means of disposing a heat insulating member between the liquid receiver 220 and the engine can be considered. However, this means increases the number of parts and increases the manufacturing cost of the refrigeration cycle. There is a risk.

On the other hand, in the present embodiment, since both the fins 212 and 232 are in contact with the liquid receiving tank 221 and the side surface, the liquid receiving tank 221 can be cooled, and the refrigerating capacity decreases. Can be prevented. (Second Embodiment) In the present embodiment, as shown in FIG.
The liquid receiving tank 211 and the second header tank 21
5 and a separator 224 (turning) between the refrigerant inlet 211a and the refrigerant outlet 211b of the liquid receiving tank 211 for turning the flow direction of the refrigerant flowing into the liquid receiving tank 211 from the refrigerant outlet 221a. Guide member)
Is provided.

The separator 224 is connected to the refrigerant outlet 2
By turning the flow direction of the refrigerant flowing into the liquid receiving tank 211 from the liquid receiving tank 211, the refrigerant flowing into the liquid receiving tank 211 does not undergo gas-liquid separation, and the refrigerant outlet 211 b
From the liquid receiving tank 211 (liquid receiver 210). By the way, in the above-described embodiment, the refrigerant inlet 201 and the refrigerant outlet 202 are provided on the upper end side of the receiver-integrated condenser 200, but both 201 and 202 are provided on the lower end side (the second header tank 2).
15).

In the above embodiment, the liquid receiving tank 2
Although 11 has a square pipe shape, it may have a round pipe shape.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a refrigeration cycle.

FIG. 2 is a cross-sectional view of the condenser integrated with a liquid receiver according to the first embodiment.

FIG. 3 is a cross-sectional view of a condenser integrated with a receiver according to a second embodiment.

[Explanation of symbols]

200: condenser integrated with receiver, 210: condenser, 211
... condenser tube, 212 ... radiation fin, 213 ...
Core part, 214 ... first header tank, 215 ... second header tank, 220 ... liquid receiver, 221 ... liquid receiver tank, 22
2. Stirrer, 230 supercooler, 231 subcooler tube, 232 radiation fins.

Claims (4)

[Claims] 1. A plurality of tubes (211) vertically extending while a refrigerant flows, and radiation fins (212) disposed between the tubes (211) to promote heat exchange between the refrigerant and air. (213) having a core portion
First and second header tanks (214, 214) extending at both ends in the longitudinal direction of the tube (211) in a direction orthogonal to the longitudinal direction of the tube (211) and communicating with the plurality of tubes (211). 215) and the tube (21) at the end of the core (213).
The refrigerant extending in the direction parallel to the longitudinal direction of 1) communicates with one of the header tanks (214, 215) and flows out of the core portion (213) into gaseous refrigerant and liquid. And a liquid receiving tank (221) for separating the liquid phase refrigerant from the liquid phase. 2. The liquid receiving tank (221) communicates at an upper end side of the liquid receiving tank (221) with a header tank (214) located above the two header tanks (214, 215). Further, in the liquid receiving tank (211), a stirrer (22) that agitates the refrigerant by colliding a refrigerant flowing from the header tank (214) into the liquid receiving tank (211).
2. The condenser integrated with a receiver according to claim 1, wherein 2) is provided. 3. The liquid receiving tank (221) communicates at a lower end side of the liquid receiving tank (221) with a header tank (215) located below the header tanks (214, 215). Further, a refrigerant inlet (21) of the liquid receiving tank (211) is provided.
1a) and a refrigerant outlet (211b), a turning guide member (2) for turning the flow direction of the refrigerant flowing from the refrigerant inlet (211a) into the liquid receiving tank (211).
24. The condenser integrated with a receiver according to claim 1, wherein 24) is provided. 4. A supercooler (230) for cooling a refrigerant flowing out of the liquid receiving tank (211), wherein a refrigerant outlet (202) of the subcooler (230) and a refrigerant outlet (202) of the header tank (214) are provided. The condenser integrated with a receiver according to any one of claims 1 to 3, wherein both the refrigerant inlet (201) is provided at one longitudinal end of the tube (211).