WO2016190025A1 - Condenser - Google Patents

Abstract

A core part (20) of this condenser (1) is provided with: a condensing portion (21) which causes a refrigerant to condense as a result of heat exchange between the refrigerant and an external fluid; and a supercooling portion (22) which is disposed at the upper side of the condensing portion (21), and which, as a result of heat exchange between the external fluid and liquid-phase refrigerant stored in a first liquid receiver (11), supercools the liquid-phase refrigerant. Furthermore, the first liquid receiver (11) and a second liquid receiver (12) are respectively configured so as to separate gas-phase refrigerant and the liquid-phase refrigerant, and store the separated liquid-phase refrigerant. The inside of the first liquid receiver (11) and the inside of the second liquid receiver (12) communicate via a liquid-reception-side communication portion (16). Moreover, the condensing portion (21) and the supercooling portion (22) communicate via a second header tank (6), a refrigerant introduction portion (111a), the first liquid receiver (11), and a supercooling-side communication portion (17) which guides the liquid-phase refrigerant stored inside the first liquid receiver (11) to the supercooling portion (22).

Description

Condenser Cross-reference to related applications

This application is based on Japanese Patent Application No. 2015-106670 filed on May 26, 2015, the contents of which are incorporated herein by reference.

The present disclosure relates to a condenser including a liquid receiver.

In recent years, there has been a demand for a thin condenser with good mountability while maintaining the heat dissipation performance of a conventional condenser. In response to such demands, in addition to the vertical receiver placed on the side of the core, which is the heat exchange part of the condenser, it is placed in a posture that lies sideways along the upper side of the core A configuration including a horizontally placed liquid receiver has been proposed (see, for example, Patent Document 1).

The condenser disclosed in Patent Document 1 has a configuration in which the liquid receivers are connected to each other via the internal space of the header tank so that the vertically placed liquid receiver and the horizontally placed liquid receiver communicate with each other. It has become.

JP 2012-67939 A

By the way, the condenser disclosed in Patent Document 1 has a supercooling portion disposed below the condensing portion, and the liquid refrigerant inside the vertically placed receiver is excessively passed from the bottom side of the vertically placed receiver. It is the structure led out to the cooling unit side.

However, in a situation where the dynamic pressure of air due to traveling wind does not act on the condenser, such as when the vehicle is idling, the high-temperature air that has passed through the radiator for cooling the engine again passes through the lower side of the condenser. The phenomenon of being caught in a condenser may occur. Such a phenomenon also occurs when other members such as other heat exchangers are arranged before and after the condenser.

When the entrainment of high-temperature air from the lower side of the condenser occurs, the cooling performance of the supercooling section arranged on the lower side of the condenser is lowered. A decrease in the cooling performance of the supercooling section is not preferable because it causes a decrease in the degree of supercooling of the liquid-phase refrigerant.

This disclosure is intended to provide a condenser capable of suppressing a decrease in cooling performance of a supercooling section due to entrainment of high-temperature air while achieving downsizing as a whole.

In one aspect of the present disclosure, a condenser that condenses the refrigerant by exchanging heat between the refrigerant and the external fluid is:
A core portion that is configured by stacking a plurality of tubes through which refrigerant flows up and down, and that dissipates the refrigerant by heat exchange with an external fluid that flows outside the tubes;
A first header tank extending along the tube stacking direction and connected to one end side of the tube in the longitudinal direction of the core;
A second header tank extending along the tube stacking direction and connected to the other end side of the tube in the longitudinal direction in the core portion;
A first liquid receiver that extends along the stacking direction of the tubes, is disposed adjacent to the second header tank, and communicates with the interior of the second header tank;
A refrigerant introduction part for guiding the refrigerant present in the second header tank to the inside of the first liquid receiver;
A second liquid receiver disposed on the upper side of the core portion, extending along the longitudinal direction of the tube, and connected to the first liquid receiver so as to communicate with the inside of the first liquid receiver.

The core unit condenses the refrigerant by heat exchange with the external fluid, and the liquid phase refrigerant disposed above the condensing unit and stored in the first receiver by heat exchange with the external fluid. It has a supercooling section for supercooling. In addition, the first liquid receiver and the second liquid receiver are configured to separate the gas-phase refrigerant and the liquid-phase refrigerant and store the separated liquid-phase refrigerant, respectively. The inside and the inside of the second liquid receiver are communicated with each other via the liquid receiving side communication portion. Furthermore, the condensing unit and the supercooling unit are connected to the supercooling side for guiding the liquid refrigerant stored in the second header tank, the refrigerant introducing unit, the first liquid receiver, and the first liquid receiver to the supercooling unit. It communicates through the part.

According to this, in addition to the first liquid receiver that extends in the tube stacking direction, the second liquid receiver that extends in the longitudinal direction of the tube is used, so the liquid receiver can be received without increasing the size of the liquid receiver. It is possible to secure a sufficient volume for storing the refrigerant in the entire vessel. As a result, the overall condenser can be reduced in size.

In the core part, the supercooling part is arranged above the condensing part. According to this, even if the phenomenon that the high temperature air is caught in the condenser again via the lower side of the condenser occurs, the supercooling part is hardly exposed to the high temperature air, so that the cooling performance in the supercooling part is ensured. be able to.

Therefore, in the condenser having the condensing part and the supercooling part in the core part, it is possible to suppress a reduction in the cooling performance of the supercooling part due to entrainment of high-temperature air while reducing the overall size.

Further, in another aspect of the present disclosure, the condenser is configured such that the liquid receiving side communication portion and the supercooling side communication portion are separate refrigerant flow paths. Thus, if the liquid receiving side communication part and the supercooling side communication part are configured as separate refrigerant flow paths, the gas phase refrigerant inside each liquid receiver is introduced to the supercooling side communication part. Can be suppressed.

It is a typical perspective view of the condenser concerning a 1st embodiment. It is typical sectional drawing which shows the internal structure of the condenser which concerns on 1st Embodiment. FIG. 3 is an enlarged view of a part III in FIG. 2. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. FIG. 5 is a VV cross-sectional view of FIG. 3. FIG. 4 is an arrow view in the direction of arrow VI in FIG. 3. It is a schematic diagram which shows the condenser with which the single liquid receiver was provided in the side of the core part. It is a schematic diagram which shows the condenser which concerns on 1st Embodiment. It is principal part sectional drawing for demonstrating the difference in the magnitude | size of the 1st liquid receiver of the condenser which concerns on 1st Embodiment, and the liquid receiver of the conventional condenser. It is a graph for demonstrating the filling characteristic of the refrigerant | coolant of the condenser which concerns on 1st Embodiment. It is typical sectional drawing which shows the modification 1 which changed the arrangement | positioning aspect of the filter in the condenser which concerns on 1st Embodiment. It is typical sectional drawing which shows the modification 2 which changed the arrangement | positioning aspect of the filter in the condenser which concerns on 1st Embodiment. It is typical sectional drawing which shows the modification 3 which changed the arrangement | positioning aspect of the filter in the condenser which concerns on 1st Embodiment. It is XIV-XIV sectional drawing of FIG. It is typical sectional drawing which shows the internal structure of the condenser which concerns on 2nd Embodiment. It is an enlarged view of the XVI part of FIG. It is XVII-XVII sectional drawing of FIG. FIG. 17 is a cross-sectional view taken along the line XVIII-XVIII in FIG. It is an enlarged view of the XIX part of FIG. FIG. 20 is a sectional view taken along line XX-XX in FIG. It is typical sectional drawing which shows the internal structure of the condenser which concerns on 3rd Embodiment. It is an enlarged view of the XXI part of FIG. FIG. 23 is a sectional view taken along line XXIII-XXIII in FIG. 22. FIG. 23 is a sectional view taken along line XXIV-XXIV in FIG. It is typical sectional drawing which shows the internal structure of the condenser which concerns on 4th Embodiment.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that, in each of the following embodiments, parts that are the same as or equivalent to the matters described in the preceding embodiment are denoted by the same reference numerals, and the description thereof may be omitted.

In addition, in each embodiment, when only a part of the constituent elements are described, the constituent elements described in the preceding embodiment can be applied to the other parts of the constituent elements.

Furthermore, the following embodiments can be partially combined with each other even if not specifically indicated, as long as the combination does not cause any trouble.

(First embodiment)
The condenser 1 according to the present embodiment is a heat exchanger that constitutes a vapor compression refrigeration cycle applied to a vehicle air conditioner. The refrigeration cycle is configured as a closed circuit in which a compressor, a condenser 1, a pressure reducing mechanism, an evaporator, and the like are sequentially connected by piping. The refrigeration cycle of this embodiment employs an engine-driven compressor that is driven by power from the engine as a compressor. The compressor may be an electric compressor that is driven by power from an electric motor.

The condenser 1 condenses the high-temperature and high-pressure gas-phase refrigerant discharged from a compressor (not shown) by exchanging heat with outside air as an external fluid. The condenser 1 leads the refrigerant condensed inside to an evaporator (not shown) that evaporates the refrigerant through a decompression mechanism (not shown).

The condenser 1 is disposed in an engine room in which an internal combustion engine (for example, an engine) that drives a vehicle is installed. The condenser 1 is arrange | positioned at the introduction path | route of the traveling wind formed in the foremost part in an engine room, for example.

First, the overall configuration of the condenser 1 of the present embodiment will be described with reference to FIG. Here, the arrows indicating up, down, left, and right in FIG. 1 indicate the up and down direction, the left and right direction, and the front and rear direction in the vehicle mounted state. The same applies to the drawings other than FIG.

The condenser 1 of the present embodiment includes, as main components, a core portion 2, a side plate 4, a pair of header tanks 5, 6, a pair of connectors 7, 8, and a pair of liquid receivers (that is, modulators) 11, 12 is provided.

The main members constituting the condenser 1 are made of an aluminum metal material such as aluminum or an aluminum alloy. The condenser 1 is brazed and joined with a brazing material provided in advance at a necessary portion of each member in a state where the members made of a metal material are assembled.

The core part 2 is a laminated body in which a plurality of tubes 2a through which a refrigerant flows are laminated vertically. The core part 2 constitutes a heat exchanging part that exchanges heat with the air that is an external fluid that flows outside the tube 2a to dissipate heat.

The core portion 2 is provided with fins 2b that promote heat exchange between the refrigerant and air between adjacent tubes 2a. The fin 2b of this embodiment is comprised with the corrugated fin bent in the waveform. The fins 2b are not limited to corrugated fins, and may be configured with plate fins or the like.

Each tube 2a of the present embodiment is constituted by a single-hole or multi-hole tube having a flat cross section. The tubes 2a are arranged at predetermined intervals so that their flat surfaces are arranged in parallel.

The core unit 2 of the present embodiment includes a condensing unit 21 that condenses the refrigerant and a supercooling unit (that is, a subcooler) 22 that cools the liquid phase refrigerant that has flowed out of the first receiver 11. The core part 2 of this embodiment has a configuration in which the supercooling part 22 is positioned above the condensing part 21. In the present embodiment, the portion of the core portion 2 that is located below the thick two-dot chain line DL in FIG. 1 constitutes the condensing unit 21, and the portion that is located above the thick two-dot chain line in FIG. Constitutes the supercooling section 22.

The side plate 4 is a reinforcing member that reinforces the core portion 2. The side plate 4 of the present embodiment is disposed at the lower end of the core 2 in the stacking direction of the tubes 2a (that is, the vertical direction in FIG. 1). The side plate 4 is joined to the fin 2b located at the lower end of the core portion 2.

The pair of header tanks 5 and 6 function as tanks that collect and distribute the refrigerant flowing through the tubes 2a. The pair of header tanks 5 and 6 are connected to both ends in the longitudinal direction of the tube 2a. That is, the first header tank 5 shown on the left side of FIG. 1 extends along the stacking direction of the tubes 2 a and is connected to one end side of the tube 2 a in the longitudinal direction in the core portion 2. Further, the second header tank 6 shown on the right side of FIG. 1 extends along the stacking direction of the tubes 2 a and is connected to the other end side in the longitudinal direction of the tubes 2 a in the core portion 2.

Each of the header tanks 5 and 6 is composed of a cylindrical hollow member extending along the stacking direction of the tubes 2a. Each header tank 5, 6 has an internal space communicating with the inside of each tube 2 a.

The pair of connectors 7 and 8 function as a refrigerant inlet / outlet in the condenser 1. The pair of connectors 7 and 8 are joined to the first header tank 5.

Among the pair of connectors 7 and 8, the inlet-side connector 7 constituting the refrigerant inlet is joined at a position close to the center side of the first header tank 5. An external pipe through which the refrigerant discharged from the compressor flows is connected to the inlet side connector 7.

Of the pair of connectors 7 and 8, the outlet side connector 8 constituting the refrigerant outlet is joined to a portion of the first header tank 5 above the inlet side connector 7. The outlet-side connector 8 is connected to an external pipe that guides the refrigerant that has passed through the condenser 1 to the decompression mechanism side.

The first liquid receiver 11 and the second liquid receiver 12 configured in a pair separate the refrigerant flowing out from the condensing unit 21 of the core unit 2 into a liquid phase refrigerant and a gas phase refrigerant, and temporarily store the liquid phase refrigerant. This tank is stored in A refrigerant storage space for storing a liquid-phase refrigerant is formed in each of the first liquid receiver 11 and the second liquid receiver 12. Each of the first liquid receiver 11 and the second liquid receiver 12 plays a role of adjusting the circulation amount of the refrigerant circulating in the cycle according to the load fluctuation of the refrigeration cycle.

Among the first liquid receiver 11 and the second liquid receiver 12, the first liquid receiver 11 is disposed adjacent to the second header tank 6. Of the first liquid receiver 11 and the second liquid receiver 12, the second liquid receiver 12 is disposed on the upper side of the core portion 2. A cylindrical space is formed inside each of the first liquid receiver 11 and the second liquid receiver 12. Each of the first liquid receiver 11 and the second liquid receiver 12 desirably has a circular cross-sectional shape of the inner wall in consideration of pressure resistance.

The 1st liquid receiver 11 adjacent to the 2nd header tank 6 is comprised with the hollow member extended along the lamination direction (namely, up-down direction) of the tube 2a. The 1st liquid receiver 11 of this embodiment is connected to the 2nd header tank 6 so that the refrigerant | coolant which flowed out from the 2nd header tank 6 may flow in.

The 2nd liquid receiver 12 distribute | arranged above the core part 2 is comprised with the hollow member extended along the longitudinal direction (namely, left-right direction) of the tube 2a. The second liquid receiver 12 of the present embodiment is connected to the first liquid receiver 11 via the second header tank 6 so as to communicate with the inside of the first liquid receiver 11.

Next, details of the condenser 1 of the present embodiment will be described with reference to FIGS. FIG. 2 is a schematic cross-sectional view of the condenser 1. FIG. 3 is an enlarged view of an essential part of FIG. For convenience of explanation, illustration of the tube 2a and the fin 2b constituting the core portion 2 is omitted in FIGS. FIG. 2 illustrates a state in which some components such as the connectors 7 and 8 appear on the front side rather than in a cross section. The same applies to the following drawings.

As shown in FIG. 2, the first header tank 5 of the present embodiment is provided with three separators 5a to 5c as partition members for partitioning the internal space up and down. The inside of the first header tank 5 is divided into four internal spaces 51a to 51c and 52a by three separators 5a to 5c.

Among the four internal spaces 51a to 51c and 52a, the internal spaces 51a to 51c excluding the uppermost internal space 52a constitute a communication space communicating with the core portion 2.

The upper internal space 51 a communicates with the supercooling unit 22 and is a space for collecting the refrigerant that has passed through the supercooling unit 22. The central internal space 51 b is a space that communicates with the condensing unit 21 and distributes the refrigerant to the condensing unit 21. The lower internal space 51 c is a space that communicates with the condensing unit 21 and changes the flow direction of the refrigerant in the condensing unit 21.

Here, the outlet connector 8 is connected to the first header tank 5 at a site forming the upper internal space 51a. Further, the first header tank 5 is connected to the inlet side connector 7 at a portion forming the central internal space 51b.

Among the internal spaces 51a to 51c, 52a, the uppermost internal space 52a constitutes a non-communication space in which communication with the core portion 2 is blocked on the upper side of the core portion 2. For convenience of explanation, the internal space 52a in the first header tank 5 may hereinafter be referred to as a first non-communication space 52a.

Further, the first header tank 5 is formed with a through-hole 53a that allows the inside of the second liquid receiver 12 and the first non-communication space 52a to communicate with each other at a portion where the first non-communication space 52a is formed. The end of the second liquid receiver 12 on the first header tank 5 side is connected to the through hole 53a.

Subsequently, in the second header tank 6 of the present embodiment, three separators 6a to 6c are provided as partition members that partition the internal space up and down. Each of the separators 6a to 6c is set so that the flow of the refrigerant in the condensing part 21 of the core part 2 becomes a meandering flow in an S shape.

Specifically, the separator 6a of the second header tank 6 is disposed at a position corresponding to the separator 5a of the first header tank 5 in the vertical direction. The separator 6b of the second header tank 6 is disposed at a position corresponding to the separator 5b of the first header tank 5 in the vertical direction. The separator 6c of the second header tank 6 is disposed below the separator 5c of the first header tank 5 in the vertical direction.

The inside of the second header tank 6 is divided into four internal spaces 61a to 61c and 62a by three separators 6a to 6c. Of the internal spaces 61a to 61c and 62a, the internal spaces 61a to 61c excluding the uppermost internal space 62a constitute a communication space communicating with the core portion 2.

The upper internal space 61 a is a space that communicates with the supercooling unit 22 and distributes the refrigerant to the supercooling unit 22. The upper internal space 61 a communicates with the internal space 51 a above the first header tank 5 through the tube 2 a constituting the supercooling unit 22.

Further, the upper internal space 61a communicates with the inside of the first liquid receiver 11 via a refrigerant outlet portion 111b of the first liquid receiver 11 described later. For this reason, the liquid-phase refrigerant inside the first liquid receiver 11 is introduced into the supercooling unit 22 via a refrigerant outlet unit 111b, an upper internal space 61a, and the like which will be described later.

The central internal space 61b is a space that changes the flow direction of the refrigerant in the condensing unit 21. The central internal space 61b communicates with the central internal space 51b of the first header tank 5 and the lower internal space 51c via the tube 2a constituting the condensing unit 21.

The lower internal space 61 c is a space for collecting the refrigerant that has passed through the condensing unit 21. The lower internal space 61 c communicates with the lower internal space 51 c of the first header tank 5 through the tube 2 a constituting the condensing unit 21.

The lower internal space 61 c communicates with the refrigerant storage space of the first liquid receiver 11 via the refrigerant introduction part 111 a in the first liquid receiver 11. For this reason, the refrigerant that has passed through the condensing unit 21 is introduced into the internal space of the first receiver 11 through the lower internal space 61c and the refrigerant introducing unit 111a.

Among the internal spaces 61a to 61c and 62a, the uppermost internal space 62a constitutes a non-communication space where communication with the core portion 2 is blocked on the upper side of the core portion 2. For convenience of explanation, hereinafter, the internal space 62a in the second header tank 6 may be referred to as a second non-communication space 62a.

Further, the second header tank 6 has a through-hole that communicates the inside of the first liquid receiver 11 and the lower internal space 61c through a refrigerant introduction part 111a described later at a portion forming the lower internal space 61c. A hole 63a is formed. The second header tank 6 has a through hole 63b that communicates the inside of the first liquid receiver 11 and the upper internal space 61a via a refrigerant outlet portion 111b, which will be described later, at a portion that forms the upper internal space 61a. Is formed.

Further, the second header tank 6 is formed with a through hole 63c that allows the inside of the first liquid receiver 11 and the second non-communication space 62a to communicate with each other at a portion where the second non-communication space 62a is formed.

The second header tank 6 is formed with a through hole 63d at a portion where the second non-communication space 62a is formed to communicate the inside of the second liquid receiver 12 and the second non-communication space 62a. The end of the second liquid receiver 12 on the second header tank 6 side is connected to the through hole 63d.

Next, the first liquid receiver 11 and the second liquid receiver 12 will be described. The first liquid receiver 11 of the present embodiment includes a cylindrical tubular portion 111, a cylindrical support portion 112 that reinforces the upper end portion of the tubular portion 111, and a screw-type tank that closes the upper end portion of the support portion 112. A cap 113 and a lid portion 114 for closing the lower end side of the cylindrical portion 111 are provided.

The cylindrical part 111 is disposed opposite to the part connected to the core part 2 in the second header tank 6 in the left-right direction. The cylindrical portion 111 has an outer diameter that is approximately the same as the dimension of the second header tank 6 in the front-rear direction.

In the cylindrical portion 111, a refrigerant introduction portion 111 a that introduces a refrigerant from the internal space 61 c of the second header tank 6 to the internal space of the first liquid receiver 11 at a portion corresponding to the through hole 63 a of the second header tank 6. Is provided. The refrigerant introduction part 111 a is joined to a part that forms the internal space 61 c below the second header tank 6.

In addition, the cylindrical portion 111 is provided with a refrigerant outlet portion 111b that leads the refrigerant from the inner space of the first liquid receiver 11 to the inner space 61a at a portion corresponding to the through hole 63b of the second header tank 6. Yes. The refrigerant outlet portion 111b is joined to a portion forming the upper internal space 61a in the second header tank 6.

The support part 112 is disposed opposite to the part connected to the supercooling part 22 in the second header tank 6 in the left-right direction. The support portion 112 is provided with a through hole 112 a that connects the refrigerant outlet portion 111 b and the internal space of the first liquid receiver 11 at a portion corresponding to the refrigerant outlet portion 111 b of the cylindrical portion 111.

In addition, the support portion 112 is provided with an upper communication portion 112b that communicates the second non-communication space 62a with the inside of the first liquid receiver 11 at a portion corresponding to the through hole 63c of the second header tank 6. ing. The upper communication part 112b is joined to a part of the second header tank 6 that forms the second non-communication space 62a.

The upper end portion of the support portion 112 is closed with a tank cap 113. As shown in FIG. 3, the tank cap 113 includes a lid portion 113 a that closes the upper end portion of the support portion 112, a first partition portion 113 b, and a second partition portion 113 c.

The lid portion 113a constitutes the upper end portion of the tank cap 113. A screw thread corresponding to a spiral groove formed on the inner peripheral side of the support portion 112 is formed on the outer periphery of the lid portion 113a so that the tank cap 113 can be attached and detached.

The first partition 113b constitutes the lower end of the tank cap 113. The first partition 113b is a partition that partitions the interior of the first liquid receiver 11 into a lower space 11a and an upper space 11b. In the first partition 113b of the present embodiment, a sealing member 11f is provided on the outer peripheral side in order to ensure airtightness between the lower space 11a and the second space 11d of the upper space 11b. .

The second partition 113c is disposed between the lid 113a and the first partition 113b. The second partition 113c is a partition that partitions the upper space 11b of the first receiver 11 into an upper first space 11c and a lower second space 11d.

The second partition 113c of the present embodiment is set so that the first space 11c and the upper communication part 112b communicate with each other, and the second space 11d and the refrigerant outlet part 111b communicate with each other. The second partition 113c is provided with a seal member 11e on the outer peripheral side thereof in order to ensure airtightness between the first space 11c and the second space 11d.

Between each partition part 113b and 113c, the communication pipe 161 which connects the upper side in the lower side space 11a of the 1st liquid receiver 11 and the 1st space 11c is provided. Each partition 113b, 113c is connected via the communication pipe 161.

As shown in FIGS. 3 and 4, the first liquid receiver 11 of the present embodiment includes a communication pipe 161, a first space 11 c of the first liquid receiver 11, an upper communication part 112 b, and a second header tank 6. The second liquid receiver 12 communicates with the second non-communication space 62a.

Therefore, in this embodiment, the communication pipe 161, the first space 11 c of the first liquid receiver 11, the upper communication part 112 b, and the second non-communication space 62 a of the second header tank 6 are included in the first liquid receiver 11. The liquid receiving side communication part 16 which makes the inside of this and the inside of the 2nd liquid receiver 12 communicate is comprised. In the present embodiment, the upper communication portion 112b constitutes a first communication portion that communicates the first space 11c with the inside of the second liquid receiver 12.

Further, a suction pipe 171 for sucking up the liquid refrigerant from the position close to the bottom of the lower space 11a of the first receiver 11 to the second space 11d is connected to the second partition 113c. The suction pipe 171 is arranged inside the first liquid receiver 11 so that the bottom side of the lower space 11a of the first liquid receiver 11 and the second space 11d of the first liquid receiver 11 communicate with each other. ing.

As shown in FIGS. 5 and 6, the first liquid receiver 11 of the present embodiment includes a supercooling unit via the suction pipe 171, the second space 11 d of the first liquid receiver 11, and the refrigerant outlet part 111 b. 22 communicates. For this reason, the liquid-phase refrigerant stored inside the first liquid receiver 11 is transferred to the supercooling section 22 via the suction pipe 171, the second space 11d of the first liquid receiver 11 and the refrigerant outlet section 111b. Derived.

Therefore, in the present embodiment, the suction pipe 171, the second space 11 d of the first receiver 11, and the refrigerant derivation unit 111 b remove the liquid refrigerant stored in the first receiver 11 from the supercooling unit 22. The supercooling side communication part 17 led to is constructed. In the present embodiment, the refrigerant derivation unit 111b constitutes a second communication unit that allows the second space 11d and the supercooling unit 22 to communicate with each other.

Here, the second space 11d constituting the supercooling side communication portion 17 is composed of the lower space 11a and the liquid receiving side communication portion by the seal member 11f of the first partition 113b and the seal member 11e of the second partition 113c. 16 is hermetically sealed with respect to the first space 11 c constituting the 16. For this reason, in the structure of this embodiment, it can suppress that the gaseous-phase refrigerant | coolant inside the 1st liquid receiver 11 and the 2nd liquid receiver 12 will be introduce | transduced with respect to the supercooling side communication part 17. FIG. . It is not preferable to introduce the gas-phase refrigerant to the supercooling side communication part 17 because the cooling performance of the refrigerant in the supercooling part 22 is reduced.

2, the desiccant 14 is arranged in the lower space 11a of the first liquid receiver 11 of the present embodiment. The desiccant 14 is a member that adsorbs water mixed in the refrigeration cycle. The desiccant 14 of the present embodiment is arranged in the lower space 11a of the first liquid receiver 11 so that at least a part thereof is below the liquid level of the refrigerant. The desiccant 14 is configured by containing a granular desiccant inside a bag-like member through which a refrigerant can pass. As the granular desiccant, for example, silica gel or zeolite excellent in adsorption performance can be employed even in a situation where the moisture concentration in the refrigerant is low.

Further, a filter 15 is disposed in the second space 11d of the first receiver 11 of the present embodiment as shown in FIGS. The filter 15 is a member that captures foreign matter in the refrigeration cycle. In the present embodiment, the filter 15 is composed of a semi-cylindrical mesh disposed in the second space 11d.

Subsequently, the second liquid receiver 12 has a cylindrical cylindrical portion 121 extending along the longitudinal direction of the tube 2 a on the upper side of the core portion 2. The cylindrical portion 121 has one end connected to the through hole 53 a of the first header tank 5 and the other end connected to the through hole 63 d of the second header tank 6.

The second liquid receiver 12 of this embodiment is disposed in contact with the upper part of the supercooling unit 22. Specifically, the 2nd liquid receiver 12 is joined with the site | part (for example, fin 2b) located in the uppermost part among the site | parts which comprise the supercooling part 22. FIG.

Next, how the refrigerant flows in the condenser 1 configured as described above will be described. When the air conditioner operation switch is turned on and the operation of the air conditioner is started during the operation of the engine, the compressor is driven by the power from the engine. Thereby, a compressor compresses and discharges a refrigerant. Then, the high-temperature and high-pressure gas-phase refrigerant discharged from the compressor flows into the central internal space 51 b of the first header tank 5 through the inlet-side connector 7.

After the refrigerant flowing into the internal space 51b is distributed to the upper tube 2a in the condensing part 21 as shown by the arrows in FIG. , Flows into the inner space 61b in the center of the second header tank 6.

The refrigerant flowing into the internal space 61b is distributed to the tube 2a on the middle stage side in the condensing unit 21 and is cooled by exchanging heat with air when passing through the tube 2a, and then below the first header tank 5. It flows into the internal space 51c.

The refrigerant flowing into the internal space 51c is distributed to the lower tube 2a in the condenser 1 and is cooled by exchanging heat with air when passing through the tube 2a. It flows into the internal space 61c. A saturated liquid refrigerant partially including a gas-phase refrigerant or a supercooled liquid refrigerant having a certain degree of supercooling flows into the internal space 61c.

The refrigerant that has flowed into the internal space 61c flows into the first liquid receiver 11 through the refrigerant introduction portion 111a, and is converted into a gas phase refrigerant and a liquid phase refrigerant due to a difference in specific gravity of the refrigerant inside the first liquid receiver 11. To be separated. In the first liquid receiver 11, a gas phase refrigerant having a low specific gravity gathers on the upper side, and a liquid phase refrigerant having a higher specific gravity than the gas phase refrigerant gathers on the lower side and is stored. At this time, water is adsorbed by the desiccant 14 in the liquid phase refrigerant stored in the first liquid receiver 11.

At least a part of the liquid-phase refrigerant stored in the first liquid receiver 11 is located above the second header tank 6 via the suction pipe 171 and the second space 11d and the refrigerant outlet portion 111b. Flows into the internal space 61a.

The liquid-phase refrigerant that has flowed into the internal space 61a is distributed to the tube 2a that constitutes the supercooling unit 22, and after passing through the tube 2a, the liquid phase refrigerant exchanges heat with air and is supercooled. Flows into the internal space 51a. Then, the liquid-phase refrigerant having the degree of supercooling that has flowed into the internal space 51 a flows out to the decompression mechanism side via the outlet-side connector 8.

Here, in the present embodiment, the first liquid receiver 11 and the second liquid receiver 12 are configured by the communication pipe 161, the first space 11c, the upper communication portion 112b, and the second non-communication space 62a. Communication is made via the liquid side communication part 16.

For this reason, a part of the liquid-phase refrigerant stored inside the first liquid receiver 11 can move to the inside of the second liquid receiver 12 via the liquid receiver side communication part 16. For this reason, the liquid-phase refrigerant can be stored inside the second liquid receiver 12.

As described above, the condenser 1 of the present embodiment can store the refrigerant flowing out of the condensing unit 21 of the core unit 2 in both the first liquid receiver 11 and the second liquid receiver 12. For this reason, the volume which can store the refrigerant | coolant in the whole condenser 1 is fully securable.

Here, FIG. 7 is a schematic view of a condenser CP of a comparative example in which a liquid receiver MT is provided on one side of the core part MC in the left-right direction. FIG. 8 is a schematic diagram of the condenser 1 according to the present embodiment. And FIG. 9 is principal part sectional drawing for demonstrating the magnitude | size difference between the liquid receiver MT of the condenser CP shown in FIG. 7, and the 1st liquid receiver 11 of the condenser 1 which concerns on this embodiment. is there. FIG. 9 shows a cut surface obtained by cutting a main part including the first liquid receiver 11 in the condenser 1 in the left-right direction.

As shown in FIG. 9, in the case of the condenser CP of the comparative example, the receiver MT sets the diameter of the receiver MT to the second header in order to store the refrigerant amount necessary for adjusting the load fluctuation in the refrigeration cycle. The tank 6 needs to be enlarged. For this reason, in the condenser CP of the comparative example, the liquid receiver MT protrudes forward and rightward by the dimensions A and B with respect to the second header tank 6. This is not preferable because it causes a wasteful space around the condenser CP.

On the other hand, in the case of the condenser 1 of the present embodiment, the liquid phase refrigerant can be stored in the second liquid receiver 12 in addition to the first liquid receiver 11. For this reason, it becomes possible to make the diameter of the 1st liquid receiver 11 smaller than the diameter of the liquid receiver MT of a comparative example. That is, in the condenser 1 of the present embodiment, the diameter of the first liquid receiver 11 can be made closer to the front-rear dimension of the core portion 2 and the front-rear dimension of the second header tank 6.

Next, the refrigerant charging characteristics in the condenser CP of the comparative example and the condenser 1 of the present embodiment will be described with reference to FIG.

FIG. 10 is a graph showing a measurement result of the degree of supercooling of the refrigerant on the outlet side of the condenser 1 when the refrigeration cycle is operated with a predetermined refrigerant charging amount. In the graph of FIG. 10, the horizontal axis indicates the refrigerant charging amount, and the vertical axis indicates the degree of refrigerant supercooling on the outlet side of the condenser 1.

In FIG. 10, the solid line indicates the measurement result in the condenser 1 of the present embodiment. Moreover, in FIG. 10, the dashed-dotted line has shown the measurement result in the condenser CP of a comparative example. In addition, FIG. 10 is a measurement result on the conditions which set the area of the core part in each condenser, and the volume of the whole liquid receiver equally.

The refrigerant charging characteristic is a characteristic indicating a change in the degree of supercooling of the refrigerant flowing out from the outlet-side connector 8 of the condenser 1 when the total amount of refrigerant circulating through the entire refrigeration cycle (that is, the refrigerant charging amount) is changed. is there. And as for the charging characteristic of the refrigerant, in order to stably exhibit the heat radiation performance in the condenser 1, it is desirable that a stable region where the degree of supercooling does not change even if the refrigerant charging amount fluctuates is wide. According to the knowledge of the present inventors, the region where the degree of supercooling is stable tends to expand with an increase in the volume capable of storing the refrigerant in the entire condenser 1 and narrow with a decrease in the volume. I know.

As shown in FIG. 10, when the refrigerant charge amount in the refrigeration cycle is increased, in the condenser 1 of this embodiment and the condenser CP of the comparative example, the refrigerant charge amount is in the range of about 480 g to 650 g, and the degree of supercooling is increased. Was stabilized at about 9 ° C. That is, the condenser 1 of the present embodiment is the same as the condenser CP of the comparative example in the region where the degree of supercooling is stable regardless of the change in the refrigerant charging amount.

From this measurement result, the condenser 1 of the present embodiment has a stable heat radiation performance comparable to the condenser CP of the comparative example, although the first receiver 11 is smaller than the condenser CP of the comparative example. It turns out that it is possible to demonstrate.

The condenser 1 of the present embodiment described above includes the second liquid receiver 12 extending in the longitudinal direction of the tube 2a in addition to the first liquid receiver 11 extending in the stacking direction of the tubes 2a. According to this, the volume which can store the refrigerant | coolant in the whole condenser 1 can fully be ensured, without enlarging the 1st liquid receiver 11. FIG. As a result, the condenser 1 as a whole can be downsized.

Further, in the present embodiment, the supercooling unit 22 is disposed above the condensing unit 21 in the core unit 2. According to this, even if a phenomenon occurs in which the high temperature air is caught again in the condenser 1 via the lower side of the condenser 1, the supercooling portion 22 becomes difficult to be exposed to the high temperature air. Cooling performance can be ensured.

Furthermore, in the condenser 1 of the present embodiment, the liquid receiving side communication portion 16 and the supercooling side communication portion 17 are configured as separate refrigerant flow paths. In other words, the condenser 1 of the present embodiment is configured such that the liquid receiving side communication portion 16 and the supercooling side communication portion 17 do not directly communicate with each other. According to this, it can suppress that the gaseous-phase refrigerant | coolant inside the 1st liquid receiver 11 and the 2nd liquid receiver 12 will be introduce | transduced with respect to the supercooling side communication part 17. FIG. It is not preferable to introduce the gas-phase refrigerant to the supercooling side communication part 17 because the cooling performance of the refrigerant in the supercooling part 22 is reduced.

Therefore, in the condenser 1 in which the core unit 2 includes the condensing unit 21 and the supercooling unit 22, it is possible to suppress a reduction in cooling performance of the supercooling unit 22 due to entrainment of high-temperature air while reducing the overall size. It becomes.

In the present embodiment, the upper side of the lower space 11a of the first liquid receiver 11 and the first space 11c communicating with the second liquid receiver 12 are communicated with each other via the communication pipe 161, and the suction pipe The liquid-phase refrigerant is sucked up from the bottom side of the lower space 11 a via the 171. According to this, the liquid-phase refrigerant stored in the first liquid receiver 11 can be appropriately guided to the supercooling unit 22.

Furthermore, in this embodiment, the second receiver 12 is brought into contact with the upper part of the supercooling unit 22 and an arrangement configuration is adopted. According to this, the 2nd liquid receiver 12 can be functioned also as a reinforcement member of the core part 2, and it becomes possible to aim at the improvement of the intensity | strength as the condenser 1 whole.

Here, in the present embodiment, the example in which the partition portions 113b and 113c that partition the inside of the first liquid receiver 11 are provided in the tank cap 113 has been described. However, the present invention is not limited thereto, and the partition portions 113b and 113c are disposed in the tank. You may comprise with a member different from the cap 113. FIG.

(Modification of the first embodiment)
In the first embodiment described above, the example in which the filter 15 that removes the foreign matters contained in the refrigerant is disposed in the second space 11d communicating with the supercooling unit 22 in the first liquid receiver 11 has been described, but the present invention is not limited to this. . For example, the filter 15 may be arranged as shown in FIGS.

(Modification 1)
As shown in FIG. 11, the filter 15 may be arranged on the refrigerant inlet side of the suction pipe 171. That is, the filter 15 may be configured to surround the lower end portion of the suction pipe 171 and the side portion of the lower end portion. In this case, the filter 15 may be fixed to the suction pipe 171 by welding or the like.

(Modification 2)
As shown in FIG. 12, the filter 15 may be arranged on the refrigerant outlet side in the suction pipe 171. That is, the filter 15 may be configured to surround the upper end portion of the suction pipe 171. Also in this case, the filter 15 may be fixed to the suction pipe 171 by welding or the like.

(Modification 3)
As shown in FIGS. 13 and 14, the filter 15 may be arranged only in a portion corresponding to the refrigerant derivation unit 111b in the second space 11d. In this case, the filter 15 may be fixed to the side surface of the tank cap 113 by welding or the like.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. This embodiment is different from the first embodiment in that a supercooling side communication portion 17 is provided in a liquid receiving side joint portion 115 that is a joint portion with the second header tank 6 in the first liquid receiver 11. Yes.

As shown in FIG. 15, the interior of the first liquid receiver 11 of the present embodiment is partitioned into a lower space 11a and an upper space 11b by a partition portion 113d provided in the tank cap 113.

The partition portion 113d of the present embodiment is set so that the upper space 11b and the upper communication portion 112b communicate with each other. As shown in FIG. 16, the partition portion 113d is provided with a seal member 11e in order to ensure airtightness between the lower side space 11a and the upper side space 11b.

In the partition portion 113d of the present embodiment, a communication pipe 161 that connects the upper side of the lower space 11a of the first receiver 11 and the upper space 11b is provided. The lid portion 113a and the partition portion 113d are connected via a communication pipe 161.

The first liquid receiver 11 of this embodiment is connected via the communication pipe 161, the upper space 11 b of the first liquid receiver 11, the upper communication portion 112 b, and the second non-communication space 62 a of the second header tank 6. It communicates with the second liquid receiver 12.

Therefore, in the present embodiment, the communication pipe 161, the upper space 11 b of the first receiver 11, the upper communication portion 112 b, and the second non-communication space 62 a of the second header tank 6 are included in the first receiver 11. The liquid receiving side communication part 16 which makes the inside of this and the inside of the 2nd liquid receiver 12 communicate is comprised. In the present embodiment, the upper communication portion 112b constitutes a first communication portion that communicates the first space 11c with the inside of the second liquid receiver 12.

Moreover, in the 1st liquid receiver 11 of this embodiment, the liquid receiving side junction part 115 which comprises the junction part joined to the 2nd header tank 6 in the site | part which forms the lower side space 11a in the cylindrical part 111 is provided. Is provided.

The liquid receiving side joining portion 115 extends from the lower side to the upper side of the through hole 63b of the second header tank 6 also from the portion corresponding to the through hole 63a of the second header tank 6. The liquid receiving side joining portion 115 is provided with a refrigerant introducing portion 111a at a portion corresponding to the through hole 63a of the second header tank 6.

In addition, the liquid receiving side joint 115 is formed with an internal communication portion 172 that connects the bottom side of the lower space 11 a of the first liquid receiver 11 and the supercooling portion 22. The internal communication part 172 communicates with the supercooling part 22 via the second header tank 6 in the upper part of the liquid receiving side joining part 115.

Specifically, as shown in FIG. 17, the internal communication portion 172 communicates with the inside of the second header tank 6 at a portion corresponding to the through hole 63 d of the second header tank 6 in the liquid receiving side joint portion 115. ing.

On the other hand, as shown in FIG. 18, the internal communication portion 172 is formed by the outer wall portion of the second header tank 6 at a portion other than the portion corresponding to the through hole 63 d of the second header tank 6 in the liquid receiving side joint portion 115. Communication with the inside of the second header tank 6 is blocked.

Further, as shown in FIG. 19, the internal communication portion 172 communicates with the lower space 11 a of the first liquid receiver 11 at a portion below the refrigerant introduction portion 111 a in the liquid receiving side joining portion 115. .

Specifically, as shown in FIG. 20, the internal communication portion 172 of the present embodiment does not communicate with the refrigerant introduction portion 111a in the portion where the refrigerant introduction portion 111a is formed in the liquid receiving side joint portion 115. It is formed on both sides of the refrigerant introduction part 111a. That is, the internal communication part 172 of the present embodiment is configured not to communicate directly with the refrigerant introduction part 111a at the liquid receiving side joining part 115.

Returning to FIG. 19, the internal communication portion 172 of the present embodiment includes a through-hole 115 a formed in a portion facing the second header tank 6 in the liquid receiving side joint portion 115, a vertically extending groove 115 b, and a second header tank. 6 outer wall portions.

Here, the portion that constitutes the groove 115b is formed on the outer wall portion of the second header tank 6 so that the internal communication portion 172 is formed between the liquid receiving side joint portion 115 and the outer wall of the second header tank 6. It is airtightly joined.

The first liquid receiver 11 of the present embodiment communicates with the supercooling section 22 through an internal communication section 172 provided at the liquid receiving side joining section 115 as shown in FIGS. For this reason, the liquid-phase refrigerant stored inside the first liquid receiver 11 is led out to the supercooling unit 22 via the internal communication unit 172.

Therefore, in the present embodiment, the internal communication portion 172 constitutes the supercooling side communication portion 17 that guides the liquid phase refrigerant stored in the first liquid receiver 11 to the supercooling portion 22. In the present embodiment, the internal communication portion 172 allows the bottom side of the lower space 11a of the first liquid receiver 11 to communicate with the supercooling portion 22, and the liquid stored on the bottom side of the lower space 11a. The 2nd communication part which guides a phase refrigerant to the supercooling part 22 is comprised.

In the lower space 11a of the first receiver 11 of the present embodiment, a filter 15 that captures foreign matter in the refrigeration cycle is disposed. The filter 15 is disposed at a position corresponding to the through hole 115 a of the liquid receiving side joint 115 that constitutes the refrigerant inlet side in the internal communication portion 172. More specifically, the filter 15 of the present embodiment has a position corresponding to the refrigerant introduction portion 111a of the liquid receiving side joint portion 115 and the penetration of the liquid receiving side joint portion 115 constituting the refrigerant inlet side in the internal communication portion 172. It arrange | positions so that the position corresponding to the hole 115a may be straddled. As a result, the liquid refrigerant after the foreign matter is removed by the filter 15 is introduced into the internal communication portion 172. The filter 15 of the present embodiment is configured by a cylindrical mesh.

Other configurations are the same as those in the first embodiment. In the present embodiment, the liquid refrigerant stored on the bottom side of the lower space 11 a of the first liquid receiver 11 is guided to the supercooling part 22 through the internal communication part 172 formed in the liquid receiving side joining part 115. It is configured. According to this, similarly to the first embodiment, the liquid-phase refrigerant stored in the first liquid receiver 11 can be appropriately guided to the supercooling unit 22.

Here, in this embodiment, the example in which the partition portion 113d that partitions the inside of the first liquid receiver 11 is provided in the tank cap 113 has been described. However, the present invention is not limited thereto, and the partition portion 113d is a separate member from the tank cap 113. You may comprise.

(Third embodiment)
Next, a third embodiment will be described with reference to FIGS. The present embodiment is different from the first embodiment in that the liquid receiving side communication portion 16 is provided in the liquid receiving side joint portion 116 which is a joint portion with the second header tank 6 in the first liquid receiver 11. Yes.

As shown in FIGS. 21 and 22, the first liquid receiver 11 of the present embodiment is partitioned into a lower space 11 a and an upper space 11 b by a partition portion 113 e provided in the tank cap 113. ing. In order to ensure airtightness between the lower space 11a and the upper space 11b, the partition portion 113e is provided with a seal member 11g on the outer peripheral side thereof.

The partition portion 113e of the present embodiment is set so that the upper space 11b and the refrigerant outlet portion 111b communicate with each other. In the present embodiment, a filter 15 that captures foreign matter in the refrigeration cycle is disposed in the upper space 11 b of the first receiver 11.

A suction pipe 171 that sucks the liquid refrigerant from the position close to the bottom of the lower space 11a of the first receiver 11 to the upper space 11b is connected to the partition 113e of the present embodiment. The suction pipe 171 is disposed inside the first liquid receiver 11 so that the bottom side of the lower space 11a of the first liquid receiver 11 and the upper space 11b of the first liquid receiver 11 communicate with each other. ing.

The first liquid receiver 11 of the present embodiment communicates with the supercooling unit 22 via the suction pipe 171, the upper space 11 b of the first liquid receiver 11, and the refrigerant derivation unit 111 b. For this reason, the liquid-phase refrigerant stored inside the first liquid receiver 11 is transferred to the supercooling section 22 via the suction pipe 171, the upper space 11 b of the first liquid receiver 11, and the refrigerant outlet section 111 b. Derived.

Therefore, in the present embodiment, the suction pipe 171, the upper space 11 b of the first receiver 11, and the refrigerant derivation unit 111 b remove the liquid refrigerant stored in the first receiver 11 from the supercooling unit 22. The supercooling side communication part 17 led to is constructed. In the present embodiment, the refrigerant derivation unit 111b constitutes a second communication unit that allows the second space 11d and the supercooling unit 22 to communicate with each other.

Here, the upper space 11b constituting the supercooling side communication portion 17 is hermetically sealed with respect to the lower space 11a by the seal member 11g of the partition portion 113e. For this reason, in the structure of this embodiment, it can suppress that the gaseous-phase refrigerant | coolant inside the 1st liquid receiver 11 and the 2nd liquid receiver 12 will be introduce | transduced with respect to the supercooling side communication part 17. FIG. .

Further, in the first liquid receiver 11 of the present embodiment, the liquid receiver that constitutes a joining portion that joins the portion forming the lower space 11 a and the upper space 11 b in the cylindrical portion 111 to the second header tank 6. A side joint 116 is provided.

The liquid receiving side joining portion 116 extends from the lower side to the upper side of the through hole 63c of the second header tank 6 also from the portion corresponding to the through hole 63b of the second header tank 6. The liquid receiving side joining portion 116 is provided with a refrigerant outlet portion 111b at a portion corresponding to the through hole 63b of the second header tank 6.

Further, the liquid receiving side joint 116 is formed with an internal communication portion 162 that allows the upper side of the lower space 11a of the first liquid receiver 11 to communicate with the second liquid receiver 12. The internal communication portion 162 communicates with the second liquid receiver 12 through the second non-communication space 62a of the second header tank 6 at the upper portion of the liquid receiving side joining portion 116. Further, the internal communication portion 162 communicates with the lower space 11a of the first liquid receiver 11 at a portion below the refrigerant outlet portion 111b in the liquid receiving side joining portion 116.

Here, as shown in FIG. 23, the internal communication portion 162 of the present embodiment is a refrigerant derivation so as not to communicate with the refrigerant derivation portion 111b at the portion where the refrigerant derivation portion 111b is formed in the liquid receiving side joining portion 116. It is formed on both sides of the portion 111b. That is, the internal communication part 162 of the present embodiment is configured not to communicate directly with the refrigerant outlet part 111b in the liquid receiving side joining part 116. In addition, as shown in FIG. 24, the 1st liquid receiver 11 of this embodiment is the 2nd header tank 6 between the downward side of the liquid receiving side junction part 116, and the upper side of the refrigerant | coolant introduction part 111a. It is configured not to touch.

Specifically, the internal communication portion 162 of the present embodiment includes a through hole 116a formed in a portion facing the second header tank 6 in the liquid receiving side joint portion 116, a vertically extending groove portion 116b, and a second header tank. 6 outer wall portions.

Here, the portion that constitutes the groove portion 116b is formed on the outer wall portion of the second header tank 6 so that the internal communication portion 162 is formed between the liquid receiving side joint portion 116 and the outer wall portion of the second header tank 6. Is airtightly bonded.

As described above, the first liquid receiver 11 of the present embodiment has the first communication portion 162 provided in the liquid reception side joint portion 116 and the second non-communication space 62a of the second header tank 6 through the first non-communication space 62a. 2 It communicates with the liquid receiver 12.

Accordingly, in the present embodiment, the internal communication portion 162 and the second non-communication space 62a of the second header tank 6 communicate with each other on the liquid receiving side that allows the inside of the first liquid receiver 11 and the inside of the second liquid receiver 12 to communicate with each other. Part 16 is configured. In the present embodiment, the internal communication portion 162 constitutes a first communication portion that connects the upper side in the lower space 11 a of the first liquid receiver 11 and the inside of the second liquid receiver 12.

Other configurations are the same as those in the first embodiment. In the present embodiment, a configuration in which the upper side of the lower space 11 a of the first liquid receiver 11 and the inside of the second liquid receiver 12 are communicated with each other via an internal communication part 162 formed in the liquid receiving side joining part 116. It is said. In the present embodiment, the liquid-phase refrigerant is sucked up from the bottom side of the lower space 11a through the suction pipe 171. According to this, similarly to the first embodiment, the liquid-phase refrigerant stored in the first liquid receiver 11 can be appropriately guided to the supercooling unit 22.

Here, in the present embodiment, the example in which the partition portion 113e that partitions the inside of the first liquid receiver 11 is provided in the tank cap 113 has been described. However, the present invention is not limited thereto, and the partition portion 113e is a separate member from the tank cap 113. You may comprise.

(Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIG. In this embodiment, the point which comprises the supercooling side communication part 17 by the external communication part 173 provided in the exterior of the 1st liquid receiver 11 is different from 1st Embodiment.

As shown in FIG. 25, in the first liquid receiver 11 of the present embodiment, the first partition 113b and the second partition 113c of the first embodiment are eliminated. That is, the first liquid receiver 11 of the present embodiment has a configuration in which the internal space is not particularly partitioned.

The first liquid receiver 11 of the present embodiment communicates with the second liquid receiver 12 via the upper communication portion 112b and the second non-communication space 62a of the second header tank 6. Therefore, in the present embodiment, the upper communication portion 112b and the second non-communication space 62a of the second header tank 6 receive the interior of the first liquid receiver 11 and the interior of the second liquid receiver 12. The liquid side communication part 16 is comprised.

Further, in the first liquid receiver 11 of the present embodiment, the liquid phase refrigerant inside the first liquid receiver 11 is guided to the supercooling section 22 in a portion that forms a lower space in the cylindrical portion 111. A communication unit 173 is connected.

The external communication part 173 is disposed outside the first liquid receiver 11. More specifically, the external communication part 173 of the present embodiment is disposed in a space formed between the first liquid receiver 11 and the second header tank 6.

The outer communication part 173 has an upper end joined to a part corresponding to the through hole 63a of the second header tank 6. The external communication part 173 communicates with the supercooling part 22 via the second header tank 6.

The lower end of the external communication portion 173 is connected to the lower portion of the first liquid receiver 11. Specifically, the external communication portion 173 of the present embodiment is connected to the upper side of the portion of the first liquid receiver 11 to which the refrigerant introduction portion 111a is connected. The external communication portion 173 communicates with the inside of the first liquid receiver 11 at its lower end.

The external communication portion 173 is not limited to the upper side of the portion of the first liquid receiver 11 to which the refrigerant introduction portion 111a is connected, but the lower side of the portion of the first liquid receiver 11 to which the refrigerant introduction portion 111a is connected. It may be connected to.

As described above, the first liquid receiver 11 according to the present embodiment communicates with the supercooling unit 22 via the external communication unit 173 provided outside the first liquid receiver 11. For this reason, the liquid-phase refrigerant stored in the first liquid receiver 11 is led to the supercooling unit 22 via the external communication unit 173.

Therefore, in the present embodiment, the external communication portion 173 provided outside the first liquid receiver 11 causes the supercooling side that guides the liquid-phase refrigerant stored inside the first liquid receiver 11 to the supercooling portion 22. The communication part 17 is comprised.

In the lower space of the first receiver 11 of the present embodiment, a filter 15 that captures foreign matters in the refrigeration cycle is disposed. More specifically, the filter 15 of the present embodiment is disposed so as to straddle the part constituting the refrigerant introduction part 111a in the first receiver 11 and the part constituting the refrigerant inlet side in the external communication part 173. Yes. As a result, the liquid refrigerant after the foreign matter is removed by the filter 15 is introduced into the external communication portion 173. In addition, the filter 15 of this embodiment is comprised by the cylindrical net-like body similarly to 2nd Embodiment.

Other configurations are the same as those in the first embodiment. In the present embodiment, the liquid refrigerant stored on the lower side of the first liquid receiver 11 is guided to the supercooling section 22 via the external communication section 173 disposed outside the first liquid receiver 11. . According to this, similarly to the first embodiment, the liquid-phase refrigerant stored in the first liquid receiver 11 can be appropriately guided to the supercooling unit 22.

(Other embodiments)
As mentioned above, although embodiment of this indication was described, this indication is not limited to the above-mentioned embodiment, and can change suitably. For example, various modifications are possible as follows.

(1) As in the above-described embodiments, in order to increase the strength of the condenser 1 as a whole, it is desirable to place the second liquid receiver 12 in contact with the upper part of the supercooling unit 22. However, the present invention is not limited to this. For example, it is good also as a structure which arrange | positions the 2nd liquid receiver 12 spaced apart from the site | part of the upper side of the supercooling part 22. FIG. In this case, a reinforcing member such as a side plate may be joined to the upper part of the supercooling unit 22.

(2) In each of the above-described embodiments, the example in which the second non-communication space 62a of the second header tank 6 is used as the supercooling side communication unit 17 is described, but the present invention is not limited to this. For example, the first liquid receiver 11 and the second liquid receiver 12 may be connected without using the second header tank 6.

Moreover, in each above-mentioned embodiment, the 1st header tank 5 side of the 2nd liquid receiver 12 is connected so that the inside of the 2nd liquid receiver 12 and the 1st non-communication space 52a of the 1st header tank 5 may connect. Although the example which connects the edge part of this to the 1st header tank 5 was demonstrated, it is not limited to this. The second liquid receiver 12 may be configured such that the inside thereof does not communicate with the first non-communication space 52 a of the first header tank 5.

(3) In each of the above-described embodiments, the example in which the first liquid receiver 11 is disposed on the right side of the core unit 2 has been described. However, the present invention is not limited to this. For example, the first liquid receiver 11 may be arranged on the left side of the core unit 2.

(4) In each of the above-described embodiments, the example in which the refrigerant flow is directed to the left and right three rotations as the condensing unit 21 of the core unit 2 has been described, but is not limited thereto. The condensing unit 21 may be configured such that the flow of the refrigerant is directed to the left and right for one or two rotations, or the refrigerant flow is turned to the left and right three times or more.

(5) Although it is desirable to arrange the fins 2b between the adjacent tubes 2a as in the above embodiments, the present invention is not limited to this, and the fins 2b may be omitted.

(6) In each of the above-described embodiments, the example in which the filter 15 that captures the foreign matter in the refrigeration cycle is arranged at various positions in the condenser 1 is described, but the present invention is not limited to this. The filter 15 may be disposed at any position as long as it is a section from the refrigerant outlet side of the condenser 21 in the condenser 1 to the outlet-side connector 8.

Here, the filter 15 may be provided in a portion other than the condenser 1, for example, on the refrigerant inlet side of the decompression mechanism downstream of the condenser 1 from the refrigerant flow. That is, the filter 15 is desirably disposed on a member having a space for storing the liquid-phase refrigerant, such as the condenser 1, but may be disposed other than the condenser 1.

(7) In each of the above-described embodiments, the inlet side connector 7 is connected to a portion corresponding to the central internal space 51 b of the first header tank 5, and the refrigerant introduction portion 111 a is connected to the internal space below the second header tank 6. Although the example which connects to the site | part corresponding to 61c was demonstrated, it is not limited to this.

In the condenser 1, for example, the inlet-side connector 7 is connected to a portion corresponding to the internal space 51 c below the first header tank 5, and the refrigerant introduction portion 111 a is connected to the central internal space 61 b of the second header tank 6. It may be a structure connected to a corresponding part.

In addition, in order to set it as such a structure, what is necessary is just to arrange | position the separator 5c of the 1st header tank 5 below the separator 6c of the 2nd header tank 6 in an up-down direction. For example, the separator 5c of the first header tank 5 is lowered to a position corresponding to the separator 6c of the second header tank 6 shown in FIG. 1, and the separator 6c of the second header tank 6 is lowered to the first header tank shown in FIG. It may be raised to a position corresponding to the separator 5c.

(8) In each of the embodiments described above, the example in which the cross-sectional shapes of the inner walls of the first liquid receiver 11 and the second liquid receiver 12 are circular in consideration of pressure resistance has been described, but the present invention is not limited to this. . For example, the first liquid receiver 11 and the second liquid receiver 12 may have a rectangular cross section on the inner wall.

Moreover, the first liquid receiver 11 and the second liquid receiver 12 may have different cross-sectional shapes. In the first liquid receiver 11 and the second liquid receiver 12, for example, the cross-sectional shape of one inner wall may be circular, and the cross-sectional shape of the other inner wall may be rectangular.

(9) As in the above-described embodiments, it is desirable to configure the liquid-receiving side communication portion 16 and the supercooling side communication portion 17 as separate refrigerant flow paths, but the present invention is not limited to this. For example, if a part of the liquid-receiving side communication part 16 is in a position that is in a position where the liquid-phase refrigerant is always present in the first liquid receiver 11, the liquid-receiving side communication part 16 and The supercooling side communication part 17 may be comprised as a common refrigerant flow path.

(10) In each of the above-described embodiments, the example in which the condenser 1 of the present disclosure is applied to a condenser of a refrigeration cycle applied to a vehicle air conditioner has been described, but the present invention is not limited to this. The condenser 1 of the present disclosure can be used as, for example, a condenser of a stationary air conditioner.

(11) In the above-described embodiment, the elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Needless to say.

(12) In the above-described embodiment, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly indicated that it is essential and clearly specified in principle. It is not limited to the specific number except in a limited case.

(13) In the above-described embodiment, when referring to the shape, positional relationship, etc. of the component, etc., its shape, unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. The positional relationship is not limited.

Claims (10)

1. A condenser that condenses the refrigerant by exchanging heat between the refrigerant and the external fluid,
   A core portion (2) configured by vertically stacking a plurality of tubes (2a) through which the refrigerant flows, and radiating the refrigerant by heat exchange with the external fluid flowing outside the tubes;
   A first header tank (5) extending along the stacking direction of the tubes and connected to one end side in the longitudinal direction of the tubes in the core portion;
   A second header tank (6) that extends along the stacking direction of the tubes and is connected to the other end side in the longitudinal direction of the tubes in the core portion;
   A first liquid receiver (11) that extends along the stacking direction of the tubes, is disposed adjacent to the second header tank, and communicates with the interior of the second header tank;
   A refrigerant introduction part (111a) for guiding the refrigerant present in the second header tank to the inside of the first liquid receiver;
   The second liquid receiver, which is disposed on the upper side of the core portion, extends along the longitudinal direction of the tube, and is connected to the first liquid receiver so as to communicate with the inside of the first liquid receiver. (12)
   The core portion condenses the refrigerant by heat exchange with the external fluid, and the liquid phase refrigerant stored in the first receiver that is disposed on the upper side of the condensing portion. A supercooling section (22) for supercooling by heat exchange with the fluid;
   The first liquid receiver and the second liquid receiver are each configured to separate a vapor-phase refrigerant and a liquid-phase refrigerant and store the separated liquid-phase refrigerant. The inside and the inside of the second liquid receiver communicate with each other via the liquid receiving side communication part (16),
   The condensing unit and the supercooling unit use the second header tank, the refrigerant introduction unit, the first liquid receiver, and the liquid phase refrigerant stored in the first liquid receiver as the supercooling unit. The condenser which is connected via the supercooling side communication part (17) which guides.
2. The condenser according to claim 1, wherein the liquid receiving side communication portion and the supercooling side communication portion are configured as separate refrigerant flow paths.
3. In the first liquid receiver,
   A first partition (113b) that partitions the interior of the first liquid receiver into a lower space (11a) and an upper space (11b);
   A second partition (113c) that partitions the upper space into a first space (11c) and a second space (11d);
   A first communication part (112b) for communicating the first space and the inside of the second liquid receiver;
   A second communication portion (111b) for communicating the second space and the supercooling portion;
   A communication pipe (161) for communicating the upper side in the lower side space with the first space;
   A suction pipe (171) for sucking up the liquid refrigerant from the position close to the bottom in the lower space to the second space;
   Is provided,
   The liquid receiving side communication portion includes the first space, the first communication portion, and the communication pipe.
   The condenser according to claim 1 or 2, wherein the supercooling side communication portion includes the second space, the second communication portion, and the suction pipe.
4. In the first liquid receiver,
   A partition (113d) that partitions the internal space of the first receiver into a lower space (11a) and an upper space (11b);
   A joint (115) for joining a portion forming the lower space in the first liquid receiver to the second header tank;
   A first communication portion (112b) for communicating the upper space with the interior of the second liquid receiver;
   A communication pipe (161) for communicating the upper side in the lower space with the upper space;
   A second communicating portion that is provided in the joining portion and communicates the bottom side in the lower space with the supercooling portion and guides the liquid refrigerant stored on the bottom side in the lower space to the supercooling portion. (172),
   Is provided,
   The liquid receiving side communication portion includes the upper space, the first communication portion, and the communication pipe.
   The condenser according to claim 1 or 2, wherein the supercooling side communication portion includes the second communication portion.
5. In the first liquid receiver,
   A partition (113e) that partitions the internal space of the first receiver into a lower space (11a) and an upper space (11b);
   A joint portion (116) for joining the portion forming the upper space and the portion forming the lower space to the second header tank;
   A first communication part (162) provided in the joint part for communicating the upper side in the lower space with the second liquid receiver;
   A second communication portion (111b) for communicating the upper space with the supercooling portion;
   A suction pipe (171) for sucking the liquid refrigerant from the position close to the bottom in the lower space to the upper space;
   Is provided,
   The liquid receiving side communication part is configured to include the first communication part,
   The condenser according to claim 1 or 2, wherein the supercooling side communication portion includes the upper space, the second communication portion, and the suction pipe.
6. A filter (15) for removing foreign substances contained in the refrigerant;
   The condenser according to claim 3 or 4, wherein the filter is disposed on one of a refrigerant inlet side and a refrigerant outlet side of the suction pipe.
7. A filter (15) for removing foreign substances contained in the refrigerant;
   The condenser according to claim 3, wherein the filter is disposed in the second space.
8. A filter (15) for removing foreign substances contained in the refrigerant;
   The condenser according to claim 5, wherein the filter is disposed in the upper space.
9. The second header tank is provided with a non-communication space (62a) that communicates with an end of the second receiver on the second header tank side and that is disconnected from the core. ,
   The condenser according to any one of claims 1 to 8, wherein the liquid receiving side communication section (16) includes the non-communication space.
10. The condenser according to any one of claims 1 to 8, wherein the second liquid receiver is disposed in contact with an upper portion of the supercooling unit.

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