CN110307677A

CN110307677A - Freezer heat exchanger and refrigerating plant

Info

Publication number: CN110307677A
Application number: CN201910465499.6A
Authority: CN
Inventors: 藤野博之; 増野谦
Original assignee: EAST PREE Co Ltd
Current assignee: EAST PREE Co Ltd
Priority date: 2014-02-03
Filing date: 2015-02-03
Publication date: 2019-10-08
Anticipated expiration: 2035-02-03
Also published as: CN104819602B; CN110307677B; CN104819602A

Abstract

The issue of the present invention is to provide a kind of freezer heat exchangers, can extend the implementation interval of required defrosting movement under the premise of reducing cooling capacity.In order to solve the above problems, freezer heat exchanger has: the 1st heat exchanger, has the 1st coolant piping route；2nd heat exchanger has the 2nd coolant piping route being connected in series on the 1st coolant piping route, and is set side by side with the 1st heat exchanger；Multiple cooling fins, in the piping of piping and the 2nd coolant piping route for being linked to the 1st coolant piping route；And pressure fan, it blows to the 1st heat exchanger and the 2nd heat exchanger.Multiple cooling fins are opposite to being set side by side in parallel to each other, the piping of 1st coolant piping route and the piping of the 2nd coolant piping route, by it is orthogonal through multiple cooling fins in a manner of link, 1st heat exchanger and the 2nd heat exchanger are set side by side in a manner of making upstream side of the 1st heat exchanger as air-supply.

Description

Freezer heat exchanger and refrigerating plant

The application is that priority date is on 2 3rd, 2014 and on March 7th, 2014, the applying date are 2 months 2015 3 days, Shen It please number be the patent of invention Shen that 201510056319.0, invention and created name is " freezer heat exchanger and refrigerating plant " Divisional application please.

Technical field

The present invention relates to a kind of freezer heat exchanger and refrigerating plants, more particularly to one kind optionally to carry out The refrigerating plant that cooling operating is operated with heating and the freezer heat exchanger for being used for this refrigerating plant.

Background technique

As for the van cooler to the dispatching commodity such as convenience store, the van cooler for being placed with following refrigerating plant is able to reality Border application, the refrigerating plant is due to that can make the cargo being loaded into library maintain optimum temperature without by outdoor temperature shadow It is loud, therefore, it can will not only cool down, can also heat up in library.

It is namely mainly cooled in summer when outdoor temperature, which is higher than, maintains temperature in library according to the refrigerating plant, when It is namely mainly warmed in winter when outdoor temperature is lower than maintenance temperature.

In patent document 1, as overland transport refrigerating plant, an example of this refrigerating plant is recorded.Patent document 1 The overland transport is heat-pump-type with refrigerating plant.

In general, due to the attachment for the snow being blown into, having cannot make library outer heat-exchanger if van cooler is driven a vehicle in snowfall The case where being functioned to heat up the heat exchanger operated.At this point, defrosted (defrost) movement and make attachment snow melt Solution.

But if continually carrying out defrosting movement, that is, if the implementation interval of defrosting movement shortens, heating movement Efficiency will reduce.

Therefore, overland transport refrigerating plant described in patent document 1 has following construction, and the construction is in van cooler Under heating mode operating when snowfall in driving, the implementation interval for preventing defrosting from acting shortens.

Specifically, have: air duct, by the air exhausting guide of the engine of van cooler to the sucking of library outer heat-exchanger Side；The switch means of wind path in air duct；And panel (Panel) is configured at library in a manner of covering library outer heat-exchanger The front of the suction side of outer heat-exchanger.

For example, snow will not directly be blown into library outer heat-exchanger according to panel.So, since accumulated snow is able to be pressed down The function of heat exchanger is made and is maintained as, therefore, it is no longer necessary to shorten defrosting movement interval.

Advanced technical literature

(patent document)

Patent document 1: Japanese Unexamined Patent Publication 2010-255909 bulletin

Summary of the invention

Problems to be solved by the invention

But refrigerating plant described in patent document 1 is configured since panel is in a manner of covering library outer heat-exchanger In the front of the suction side of library outer heat-exchanger, therefore, driving wind (wind caused by vehicle traveling, base when van cooler is driven a vehicle In the relative velocity of vehicle and air) by panel mask, and cannot be directly blown on the outer heat-exchanger of library.

Therefore, in the cooling operating that outer heat-exchanger plays a role as condenser in library, may generate can not be true The case where protecting abundant air quantity.

If being unable to ensure sufficient air quantity, it will generate following problems: refrigerant cannot be condensed fully, cooling capacity drop It is low.

Therefore, for freezer heat exchanger and refrigerating plant, it can be desirable to cooling capacity can not made to drop Under the premise of low, extend the implementation interval of required defrosting movement.

Therefore, project to be solved by this invention is to provide a kind of freezer heat exchanger and uses the freezing The refrigerating plant of device heat exchanger, the freezer heat exchanger can be in the premises for reducing cooling capacity Under, extend the implementation interval of required defrosting movement.

Solve the technological means of project

In order to solve the above problems, the present invention has structure below.

(1) a kind of freezer heat exchanger, has:

1st heat exchanger has the 1st coolant piping route；

2nd heat exchanger has the 2nd coolant piping route being connected in series on aforementioned 1st coolant piping route, and It is set side by side with aforementioned 1st heat exchanger；

Multiple cooling fins, across the piping and aforementioned 2nd coolant piping route for being linked to aforementioned 1st coolant piping route Two side of piping on；And

Pressure fan blows to aforementioned 1st heat exchanger and aforementioned 2nd heat exchanger；

Also, aforesaid plurality of cooling fin is opposite to being set side by side in parallel to each other,

The piping of aforementioned 1st coolant piping route and the piping of aforementioned 2nd coolant piping route, with orthogonal through aforementioned The mode of multiple cooling fins links,

Aforementioned 1st heat exchanger and aforementioned 2nd heat exchanger, so that aforementioned 1st heat exchanger becomes by aforementioned pressure fan The mode of the upstream side of generated air-supply is set side by side.

(2) freezer heat exchanger as described in (1), wherein aforementioned 1st coolant piping route has two or more Path, number of path be Na (integer of Na:2 or more).

(3) freezer heat exchanger as described in (2), wherein aforementioned 2nd coolant piping route has two or more Path, number of path be Nb (integer of Nb:2 or more),

Aforesaid paths number Na and aforesaid paths number Nb meets 2≤Na≤Nb.

(4) freezer heat exchanger as described in any one of (1)-(3), wherein make aforementioned 1st heat exchanger and At least one party in aforementioned 2nd heat exchanger is fin tube type heat exchanger.

(5) freezer heat exchanger as described in any one of (1)-(3), wherein before as refrigerating plant Library outer heat-exchanger is stated in use, the refrigerating plant has the refrigerant including library inside heat exchanger and library outer heat-exchanger time Road, and selectively carry out making cooling operating cooling in library to operate with the heating to heat up in library is made,

In aforementioned cooling operating, aforementioned 1st heat exchanger is integrally sent out with aforementioned 2nd heat exchanger as condenser Function is waved,

In aforementioned heating operating, aforementioned 1st heat exchanger is functioned as subcooler, and aforementioned 2nd heat exchange Device is functioned as evaporator.

(6) freezer heat exchanger as described in (4), wherein when heat exchange outside the aforementioned library as refrigerating plant Device is in use, the refrigerating plant has the coolant loop including library inside heat exchanger and library outer heat-exchanger, and selectively Make cooling operating cooling in library to operate with the heating to heat up in library is made,

(7) a kind of refrigerating plant, has a coolant loop, and the coolant loop includes library inside heat exchanger, heat exchange outside library Device and the accumulator that refrigerant can be detained, and the refrigerating plant selectively carries out making cooling cooling operating in library and makes library The heating of interior heating operates, and the refrigerating plant is characterized in that:

Aforementioned library outer heat-exchanger is freezer heat exchanger described in (1),

In aforementioned heating operating, aforementioned 1st heat exchanger is functioned as subcooler, and aforementioned 2nd heat exchanger It is functioned as evaporator,

Aforementioned 1st heat exchanger has piping column group, and the piping column group is that a column of specified vol exist with the route of pipe line It is set side by side that M (integer of M:1 or more) is a to be formed on the direction of aforementioned air-supply in series, and aforementioned M is to hand over aforementioned 1st heat The maximum value when capacity of parallel operation is the range no more than the capacity of aforementioned accumulator.

(8) refrigerating plant as described in (7), wherein aforementioned 1st coolant piping route has two or more paths, road Diameter number is Na (integer of Na:2 or more),

Aforementioned piping column group is correspondingly arranged with aforementioned two or more paths respectively.

The effect of invention

According to the present invention, it obtains following effect: required defrosting can be extended under the premise of reducing cooling capacity The implementation interval of movement.

Detailed description of the invention

Fig. 1 be freezer heat exchanger and refrigerating plant of the invention embodiment i.e. library outer heat-exchanger 3 with make With the coolant loop figure of the refrigerating plant 51 of this library outer heat-exchanger 3.

Fig. 2 is the figure to illustrate the control system of refrigerating plant 51.

Fig. 3 is the figure to illustrate the control model of the four-way valve 2 in refrigerating plant 51, solenoid valve 11 and solenoid valve 13.

Fig. 4 is the schematic cross sectional view to illustrate the library outer heat-exchanger 3 in refrigerating plant 51.

Fig. 5 is the 1st perspective view to illustrate library outer heat-exchanger 3.

Fig. 6 is the 2nd perspective view to illustrate library outer heat-exchanger 3.

Fig. 7 is the figure to illustrate the path in library outer heat-exchanger 3.

Fig. 8 is to illustrate the mounting example of the refrigerating plant 51 i.e. side view of van cooler C.

Fig. 9 is the coolant loop figure to illustrate the cooling operating of refrigerating plant 51.

Figure 10 is the coolant loop figure to illustrate the heating operating of refrigerating plant 51.

Figure 11 is the table of the control carried out to the control unit 31 illustrated in refrigerating plant 51.

Figure 12 is that the local refrigerant to illustrate the major part of the coolant loop in change case 1 i.e. refrigerating plant 51A returns Lu Tu.

Figure 13 is that the local refrigerant to illustrate the major part of the coolant loop in change case 2 i.e. refrigerating plant 51B returns Lu Tu.

Figure 14 is the coolant loop figure in change case 3 i.e. refrigerating plant 57.

Figure 15 is the figure to illustrate the control system of refrigerating plant 57.

Figure 16 is the coolant loop figure to illustrate the cooling operating of refrigerating plant 57.

Figure 17 is the coolant loop figure to illustrate the heating operating of refrigerating plant 57.

Figure 18 is the table of the control carried out to the control unit 31 illustrated in refrigerating plant 57.

Figure 19 is the figure to illustrate the shunt circuit LP1a of change case 4.

Description of symbols

1 compressor

2 four-way valves

The port 2a-2d

3 library outer heat-exchangers

The 1st library outer heat-exchanger of 3A

The port 3Aa, 3Ab

The 2nd library outer heat-exchanger of 3B

The port 3Ba, 3Bb

3C pipe

3f cooling fin

3LA, 3LB coolant piping route

4 accumulators

5, the library 25A, 25B inside heat exchanger

6 hydraulic accumulators

7,12,22A, 22B, 72 expansion valves

The check-valves of 8-10,14-16,71,73

11,13,21A, 21B, 23 solenoid valves

17 gas-liquid heat exchangers

31 control units

32 input units

51,51A, 51B, 57 refrigerating plants

C van cooler

The library C1 (counter)

The inner space CV

D1-D4 difference unit

G, GA1, GA2, GB3-GB5 piping column group

FM1, FM2, FM25A, FM25B fan (pressure fan)

The shunt circuit LP1, LP2, LP72, LP1A

L1-L11,3LA, 3LB, L76, L77 match the route of pipe line

Na, Nb number of path

The path P1-P5

Qa, Qb capacity

RA, RB flow path

RK circulating direction limiting unit

S host body

Specific embodiment

Library outer heat-exchanger 3, the refrigerating plant 51 using this library outer heat-exchanger 3 and their change according to the embodiment Change example ,-Figure 19, illustrates the freezer heat exchanger and refrigerating plant of implementation form of the invention referring to Fig.1.

(embodiment)

The structure of refrigerating plant 51 is shown in Fig. 1 as this coolant loop figure and is painted in Fig. 2 of control system.

That is, the coolant loop of refrigerating plant 51 has a structure that compressor 1, four-way valve 2, comprising what is driven by motor Pressure fan, that is, fan FM1 library outer heat-exchanger 3, accumulator 4 include in the pressure fan i.e. library of fan FM2 driven by motor Heat exchanger 5, hydraulic accumulator 6, solenoid valve 11 and solenoid valve 13.

The movement of compressor 1, four-way valve 2, fan FM1, fan FM2, solenoid valve 11 and solenoid valve 13 in coolant loop, It is to be controlled by control unit 31.

About the instruction of operating as made by user, control unit 31 is conveyed to via input unit 32.

Library outer heat-exchanger 3 and library inside heat exchanger 5 are so-called fin and tube type (Fin and Tube) heat exchangers.And And library outer heat-exchanger 3 has a structure that the 1st library outer heat-exchanger 3A and the 2nd library outer heat-exchanger 3B；And by the 1st library The circuit (shunt circuit LP1) that outer heat-exchanger 3A and the 2nd library outer heat-exchanger 3B are connected in series on coolant loop.

1st library outer heat-exchanger 3A has coolant piping route 3LA, and the coolant piping route 3LA is by port (port) 3Aa is connect (referring to Fig. 4 and Fig. 7) with port 3Ab.Also, the 2nd library outer heat-exchanger 3B has coolant piping route 3LB, described Port 3Ba is connect (referring to Fig. 4 and Fig. 7) by coolant piping route 3LB with port 3Bb.About the detailed of this library outer heat-exchanger 3 Feelings are described in detail below.

For the coolant loop of refrigerating plant 51, make narration in detail.

The port 2a of compressor 1 and four-way valve 2, by matching route of pipe line L1 connection.

The port 3Ba of the port 2b and the 2nd library outer heat-exchanger 3B in library outer heat-exchanger 3 of four-way valve 2, by matching pipeline Road L2 connection.

The port 3Ab of the port 3Bb and the 1st library outer heat-exchanger 3A of 2nd library outer heat-exchanger 3B, via shunt circuit LP1 connection.

Shunt circuit LP1 has a structure that with route of pipe line L3 and with route of pipe line L4.

It is equipped on matching route of pipe line L3: expansion valve 7；And check-valves 8, the 1st library is connected in series in relative to expansion valve 7 The side outer heat-exchanger 3A only allows to circulate from the 1st library outer heat-exchanger 3A towards the 2nd library outer heat-exchanger 3B.

With check-valves 9 is equipped on route of pipe line L4,9, the check-valves allow from the 2nd library outer heat-exchanger 3B direction 1st library outer heat-exchanger 3A circulation.

The port 3Aa and accumulator 4 of 1st library outer heat-exchanger 3A, by matching route of pipe line L5 connection.

With on route of pipe line L5, it is provided with difference unit D1 and difference unit D2 halfway.Between difference unit D1 and difference unit D2, It is equipped with check-valves 10,10, the check-valves allow to circulate from the 1st library outer heat-exchanger 3A towards accumulator 4.

Accumulator 4 and library inside heat exchanger 5, connect via shunt circuit LP2.Shunt circuit LP2 has a structure that With route of pipe line L6 and match route of pipe line L7.

It is equipped on matching route of pipe line L6: solenoid valve 11；And expansion valve 12, library is connected in series in relative to solenoid valve 11 5 side of inside heat exchanger.

Solenoid valve 13 is equipped on matching route of pipe line L7.

The port 2d of library inside heat exchanger 5 and four-way valve 2, by matching route of pipe line L8 connection.With on route of pipe line L8, set halfway It is equipped with difference unit D3 and difference unit D4.Between difference unit D3 and difference unit D4, it is equipped with check-valves 14,14, the check-valves Allow to circulate from library inside heat exchanger 5 towards four-way valve 2.

With the difference unit D3 in route of pipe line L8 and with the difference unit D1 in route of pipe line L5, by matching route of pipe line L9 connection.Matching Check-valves 15 is equipped on route of pipe line L9,15, the check-valves allow to circulate from difference unit D3 towards difference unit D1.

With the difference unit D4 in route of pipe line L8 and with the difference unit D2 in route of pipe line L5, by matching route of pipe line L10 connection.Matching Check-valves 16 is equipped on route of pipe line L10,16, the check-valves allow to circulate from difference unit D4 towards difference unit D2.

Four difference unit and four check-valves, that is, difference unit D1-D4, check-valves 10 and check-valves 14-16 constitute circulation side To limiting unit RK.

Circulating direction limiting unit RK is selected corresponding to the flow path carried out with switching four-way valve 2, hot to being in and out of outside library The circulating direction of the refrigerant of the port 3Aa of exchanger 3 is limited.It is as explained further below described.

The port 2c and compressor 1 of four-way valve 2, via hydraulic accumulator 6, by matching route of pipe line L11 connection.

For this coolant loop, control unit 31 is selectively controlled, and becomes the movement of four-way valve 2 in Mode A and Mode B It is any.

It is concretely demonstrated, Mode A is following mode: port 2a being connect with port 2b, and by port referring to Fig. 3 2c is connect with port 2d.

Mode B is following mode: port 2a being connect with port 2d, and port 2b is connect with port 2c.

According to four-way valve 2, in Mode A, the route for selecting flow path RA to circulate as refrigerant is (referring to the thick line line of Fig. 9 Road).Also, in Mode B, select flow path RB (0 thick line route referring to Fig.1).That is, four-way valve 2 is in coolant loop, as It selects the flow path selector of the flow path of refrigerant circulation and functions.

Also, control unit 31 controls solenoid valve 11 and solenoid valve 13, alternately turns on them.This control and four-way valve 2 Movement link carry out.

Specifically, as shown in figure 3, in Mode A, solenoid valve 11 is opened, and solenoid valve 13 is closed.In Mode B In, solenoid valve 11 is closed, and solenoid valve 13 is opened.

Then, the details about library outer heat-exchanger 3 are illustrated referring to Fig. 4-Fig. 7.

Fig. 4 is schematic diagram corresponding with the cross section of library outer heat-exchanger 3.Fig. 5 is from library outer heat-exchanger 3 Left obliquely downward observation obtained by stereoscopic figure, Fig. 6 is stereoscopic figure obtained by from right obliquely downward.Fig. 7 be to Illustrate the figure in the path (coolant piping route 3LA, 3LB) of the inside of library outer heat-exchanger 3.

The all directions of the front and back up and down shown in fig. 6 Fig. 4-, be for easy understanding and the direction that suitably sets, not Limit setting pattern etc..

As described above, library outer heat-exchanger 3 is constituted in the form of fin tube type heat exchanger.

As shown in figure 4, the pipe 3c as pipeline is in the longitudinal direction 4 column, in the up-down direction respectively on cross section It is classified as 14 sections.That is, if it is N sections of M column of fin tube type heat exchanger, then M=4, N=14.

Each pipe 3c is arranged with turning back at the portion of left and right ends, to link shown in the thick line as Fig. 4.

Among 4 column, 1 column of forefront side are contained in the 1st library outer heat-exchanger 3A, and 3 column counted from rear side include In the 2nd library outer heat-exchanger 3B.

That is, the 1st library outer heat-exchanger 3A is 14 sections of 1 column, the 2nd library outer heat-exchanger 3B is 14 sections of 3 column.

Herein, by 1 column or two or more column being connected in series, group G is arranged as piping.In the case where 1 column, for convenience Also referred to as " piping column group ".

Therefore, the 1st library outer heat-exchanger 3A has M with 1 column piping column the group GA, the 2nd library outer heat-exchanger 3B of M=1 =33 column piping column group GB.

Also, in the 1st library outer heat-exchanger 3A, the pipe 3cA of 7 sections of parts of upper side as a coolant piping route and Path P 1 is constituted, 7 sections of parts of downside constitute path P 2 as a coolant piping route.

In the 2nd library outer heat-exchanger 3B, the pipe 3cB of 5 sections or 4 sections of each column of upper side totally 14 parts is as a refrigerant Constitute path P 3 with the route of pipe line, the pipe 3cB of 5 sections or 4 sections of each column of central portion totally 14 parts is as a coolant piping route And path P 4 is constituted, the pipe 3cB of 5 sections or 4 sections of each column of lower side totally 14 parts constitutes road as a coolant piping route Diameter P5.

Therefore, as shown in figure 4, in the 1st library outer heat-exchanger 3A, correspondingly it is arranged respectively with path P 1 and path P 2 There are piping column group GA1 and piping column group GA2.Also, in the 2nd library outer heat-exchanger 3B, distinguish correspondingly with path P 3-P5 It is provided with piping column group GB3-GB5.

The number of path Na of 1st library outer heat-exchanger 3A is 2 or more integer, and is the number of path of the 2nd library outer heat-exchanger Nb (integer of Nb:2 or more) is below.That is, 2≤Na≤Nb.

The library outer heat-exchanger 3 of refrigerating plant 51 meets this relationship, as described above, the path of the 1st library outer heat-exchanger 3A Number Na is that the number of path Nb of the 2, the 2nd library outer heat-exchanger 3B is 3 or less.

In the 1st library outer heat-exchanger 3A, port 3Aa disagreement is simultaneously connected to one end of path P 1 and one end of path P 2. Port 3Ab disagreement is simultaneously connected to the other end of path P 1 and the other end of path P 2.

That is, as shown in fig. 7, path P 1 and path P 2 are connected in parallel between port 3Aa and port 3Ab.

Also, as shown in figure 4, path P 1 and path P 2 configure in the following way: on air supply direction (front-rear direction) It does not overlap each other, becomes the independent region of essence in suction plane.

In the 2nd library outer heat-exchanger 3B, port 3Ba disagreement is three, and is connected to one end of path P 3-P5 Side.Port 3Bb disagreement is three, and is connected to the another side of path P 3-P5.

That is, as shown in fig. 7, path P 3-P5 is connected in parallel between port 3Ba and port 3Bb.

As shown in figure 4, path P 3-P5 is configured in the following way: on air supply direction (front-rear direction) each other generally Do not have overlapped, and becomes the independent region of essence in the one side of suction side (hereinafter also referred to as suction plane).

1st library outer heat-exchanger 3A is since number of path Na is fewer, and in suction plane, area shared by a path is bigger, Therefore, it is uneven to be easy to produce apparent surface temperature by the 1st library outer heat-exchanger 3A.

Therefore, if increasing number of path Na, in suction plane, area shared by a path will become smaller, overall surface The unevenness of temperature is suppressed.

That is, it is ideal to increase number of path Na from the viewpoint of the unevenness for inhibiting surface temperature.

On the other hand, in the case where being provided with two or more paths, number of path Na is more, the refrigerant of passage path Flow velocity is lower.

Therefore, in design, the flow velocity for considering the uneven degree and refrigerant of surface temperature, so that heat exchange function is good The mode that ground plays sets number of path Na.

For example, the number of path Nb of the number of path Na and the 2nd library outer heat-exchanger 3B of the 1st library outer heat-exchanger 3A can be made Identical quantity (Na=Nb), wherein the 2nd library outer heat-exchanger 3B plays work as evaporator in aftermentioned heating operating With it is further preferred that the number of path Nb of the 2nd library outer heat-exchanger 3B of number of path Na of the 1st library outer heat-exchanger 3A can be made (Na < Nb) below.

Consider the piping length between port 3Ba and port 3Bb, this flow path area being piped (matching bore), circulate in The speed etc. of refrigerant in piping suitably sets the number of path Nb of the 2nd library outer heat-exchanger 3B, so that liquid refrigerants can be made good Ground phase transformation is melted into gaseous coolant.

As shown in Figure 5 and Figure 6, multiple cooling fin 3f are located at heat exchange outside the 1st library outer heat-exchanger 3A and the 2nd library respectively On device 3B.

Specifically, multiple cooling fin 3f are adjacent to each other and opposite to being set side by side in parallel to each other.Moreover, outside the 1st library The coolant piping line of the piping of the coolant piping route of heat exchanger 3A, that is, pipe 3cA (referring to Fig. 4) and the 2nd library outer heat-exchanger 3B The piping on road, that is, pipe 3cB (referring to Fig. 4), by it is orthogonal through multiple cooling fin 3f in a manner of link together.

Therefore, between the 1st library outer heat-exchanger 3A and the 2nd library outer heat-exchanger 3B, via cooling fin 3f reciprocally into Row heat transmitting.

1st library outer heat-exchanger 3A and the 2nd library outer heat-exchanger 3B, is set side by side in the longitudinal direction.Specifically, 1 library outer heat-exchanger 3A is the circulation side being configured in a way that relative to wind caused by the driving as fan FM1 To, and become weather side.That is, the 1st library outer heat-exchanger 3A is upstream side heat exchanger, the 2nd library outer heat-exchanger 3B is downstream Side heat exchanger.

Refrigerating plant 51 described in detail above can be adapted for various equipment and device etc..For example, being placed in van cooler C.

Fig. 8 is the side view for indicating an example being placed on van cooler C, and a portion is cut surface.

Library inside heat exchanger 5 is configured in should maintain the library i.e. counter C1 of constant temperature (hereinafter, also referred to as in van cooler C Library C1) inner space CV in, carry out heat exchange with the air of inner space CV.

In the outside (such as top of driver's seat) of counter C1, it is configured with library outer heat-exchanger 3, carries out heat with outside air Exchange.

Other components are set to the outside of counter C1, and position is arranged and is not limited.

For example, compressor 1 and hydraulic accumulator 6 etc. are incorporated in host body S, and it is arranged at the lower section of car body.Control unit 31 It is arranged near driver's seat with input unit 32.Especially input unit 32 is configured in the maneuverable place of driver.

The power source of compressor 1 is such as battery of van cooler C or engine (not shown).

Then, the motion about refrigerating plant 51, based on the state being positioned on van cooler C, referring especially to Fig. 3, Fig. 7 and Fig. 9-Figure 11 is illustrated.

Refrigerating plant 51 is based on, via instruction made by input unit 32, selectively carrying out multiple modes as user Operating, that is, cooling operating, heating operating, the defrosting operating of library outer heat-exchanger 3 and the defrosting of library inside heat exchanger 5 operating, To make to become certain temperature in the C1 of library.

Firstly, illustrating cooling operating and heating operating.

The figure of coolant loop when Fig. 9 is to illustrate that cooling operates.Figure 10 is to illustrate refrigerant when heating operating The figure in circuit.Figure 11 is the table to the control of the control unit 31 when illustrating each operating.In the coolant loop of Fig. 9 and Figure 10 In, the piping position that refrigerant flows is painted with thick line, the flow direction of refrigerant is painted with block arrow.

(cooling operating)

As shown in figure 11, in cooling operating, control unit 31 makes 2 Mode A of four-way valve, and solenoid valve 11 is in an open state, Solenoid valve 13 is in off state, and fan FM1 and fan FM2 are operating condition.

In Fig. 9, this cools down the air supply direction as caused by fan FM1 and fan FM2 in operating, respectively with arrow DR1 and arrow DR2 are painted.

As shown in figure 9, according to the control of control unit 31, the high-pressure gaseous refrigerant to be spued by the discharge opening of compressor 1, from For the port 2a of the four-way valve 2 of Mode A, flow by port 2b with route of pipe line L2.

It flows into the gaseous coolant in route of pipe line L2, is supplied from port 3Ba hot outside the 2nd library into library outer heat-exchanger 3 In exchanger 3B, the either path in path P 3-P5 is flowed through, is then flowed out in the form of gas-liquid mixed refrigerant from port 3Bb.

The gas-liquid mixed refrigerant flowed out from port 3Bb is supplied from port 3Ab to heat exchange outside the 1st library by check-valves 9 Device 3A flows through the either path in path P 1 and path P 2, then flows out from port 3Aa.

In library outer heat-exchanger 3, fan FM1 according to the control of control unit 31 and be in operating condition, outside air to It flows in the direction arrow DR1 of Fig. 9.

Under this state, in library outer heat-exchanger 3, the 2nd library outer heat-exchanger 3B and the 1st library outer heat-exchanger 3A are as one The condenser of body and function.That is, gaseous coolant radiates to outside air and condenses, from end in the form of high-pressure liquid refrigerant Mouth 3Aa, which is flowed into, matches route of pipe line L5.

Specifically, refrigerant is at entrance, that is, port 3Ba of the 2nd library outer heat-exchanger 3B, all gas phases.Gas phase it is cold Matchmaker's (gaseous coolant) carries out heat exchange, part gaseous coolant with outside air with flowing in the 2nd library outer heat-exchanger 3B It condenses (liquefaction), liquid refrigerants increases relative to the ratio of gaseous coolant.

So, at outlet, that is, port 3Bb of the 2nd library outer heat-exchanger 3B, refrigerant becomes liquid refrigerants and gaseous state The gas-liquid mixed refrigerant that refrigerant mixes.Herein, the ratio of liquid refrigerants is different with operating condition.

Then, the gas-liquid mixed refrigerant flowed out from port 3Bb flows into the 1st library outer heat-exchanger 3A from port 3Ab.It utilizes 1st library outer heat-exchanger 3A, continues the heat exchange of refrigerant and outside air, is in the 3Aa of port in outlet, refrigerant is in high pressure Under it is substantially the entirety of become liquid phase (liquid).

Due to refrigerant in library outer heat-exchanger 3 from gas phase to undergoing phase transition of liquid phase, and reduce the volume of refrigerant.

In library outer heat-exchanger 3, heat outside the 1st library that the refrigerant for causing liquid phase ratio to get higher because volume reduces is circulated The number of path Na of exchanger 3A, the number of path Nb less than the 2nd library outer heat-exchanger 3B that the higher refrigerant of gas phase ratio is circulated. So, the refrigerant in the 1st library outer heat-exchanger 3A is circulated in, is handed over heat outside the 2nd library is circulated in the form of liquid refrigerants It is compared when parallel operation 3B, mass velocity becomes larger, and the degree of supercooling of refrigerant also becomes larger.

It flows into the high-pressure liquid refrigerant in route of pipe line L5, by check-valves 10, into accumulator 4.

In accumulator 4, it is detained the liquid refrigerants of surplus corresponding with operating conditions.

For example, the amount of the refrigerant of circulation can be less when the thermic load in the C1 of library is smaller, accumulate in accumulator 4 compared with More liquid refrigerants.On the other hand, when the thermic load in the C1 of library is larger, since the amount needs of the refrigerant of circulation are more, The quantitative change for lodging in the liquid refrigerants in accumulator 4 is few.

Accumulator 4 becomes following construction: when there is liquid refrigerants accumulation, flowing out liquid refrigerants.

Solenoid valve 13 is closed according to the control of control unit 31, and opens solenoid valve 11, therefore, is flowed out from accumulator 4 Liquid refrigerants flow into piping route L6.

That is, flowing into the liquid refrigerants in route of pipe line L6, enter expansion valve 12 by solenoid valve 11.

In expansion valve 12, liquid refrigerants expansion.So, liquid refrigerants is due to pressure and temperature reduction, and gasify quilt Promote, and becomes the gas-liquid mixed refrigerant that gas phase is mixed with liquid phase.

The gas-liquid mixed refrigerant flowed out from expansion valve 12, flows into library inside heat exchanger 5.

In library inside heat exchanger 5, fan FM2 is in operating condition according to the control of control unit 31, makes in the C1 of library Air is flowed to the direction of the arrow DR2 of Fig. 9.

In this case, the air in gas-liquid mixed refrigerant and library C1 carries out heat exchange, obtains heat from the air in the C1 of library Amount, it is completely vaporization, and become gaseous coolant.That is, library inside heat exchanger 5 is functioned as evaporator, then in the C1 of library It is cooled.

The gaseous coolant flowed out from library inside heat exchanger 5, flows into and matches route of pipe line L8.

With in route of pipe line L8, the pressure due to gaseous coolant in difference unit D3 is lower than with the difference unit D1 in route of pipe line L5 Pressure therefore may not flow into route of pipe line L9, but pass through check-valves 14 reach four-way valve 2.

Since four-way valve 2 becomes Mode A according to the control of control unit 31, gaseous coolant flows through end from port 2d Mouth 2c, further flows through hydraulic accumulator 6 and is back to the suction inlet of compressor 1.

(heating operating)

As shown in figure 11, in heating operating, control unit 31 makes 2 Mode B of four-way valve, and solenoid valve 11 is in off state, Solenoid valve 13 is in an open state, and fan FM1 and fan FM2 are operating condition.

The air supply direction of fan FM1 and fan FM2 in this heating operating, are mutually all certain direction with cooling operating, It is painted respectively with arrow DR3 and arrow DR4 in Figure 10.

As shown in Figure 10, according to the control of control unit 31, the high-pressure gaseous refrigerant to be spued by the discharge opening of compressor 1, from The port 2a of four-way valve 2 as Mode B, flows by port 2d with route of pipe line L8.Then, gaseous coolant is from difference unit D4 It flows into and matches route of pipe line L10, and enter accumulator 4.

In accumulator 4, gaseous coolant squeezes out the liquid refrigerants accumulated in cooling operating before, quickly full of by In liquid device 4.

Therefore, it after gaseous coolant is with the liquid refrigerants of burden, is flowed out from accumulator 4.According to the control of control unit 31 System makes solenoid valve 13 become opening state, and solenoid valve 11 becomes closed state, therefore, the gaseous coolant stream flowed out from accumulator 4 Enter to match route of pipe line L7, then flows into library inside heat exchanger 5.

In library inside heat exchanger 5, as described above, fan FM2 is in operating condition according to the control of control unit 31, library Air in C1 is flowed to the direction arrow DR4 of Figure 10.

In this case, the air in gaseous coolant and library C1 carries out heat exchange, the air in Xiang Ku C1 release heat and Condensation, essentially becomes high-pressure liquid refrigerant.Therefore, heating in the C1 of library.

From the refrigerant that library inside heat exchanger 5 flows out, containing liquid refrigerants, and contain and the thermic load etc. in the C1 of library The gaseous coolant of the corresponding amount of operating conditions.

Since at difference unit D3, pressure is lower than difference unit D4, and therefore, this contains the gas of the liquid refrigerants and gaseous coolant Liquid mixing refrigerant, which flows into, matches route of pipe line L9.Then, check-valves 15 is flowed through, the 1st library of library outer heat-exchanger 3 is flowed into from port 3Aa Outer heat-exchanger 3A.

In library outer heat-exchanger 3, fan FM1 according to the control of control unit 31 and be in operating condition, outside air to It flows in the direction arrow DR3 of Figure 10.Therefore, the 1st library outer heat-exchanger 3A is located at outside relative to the 2nd library outer heat-exchanger 3B The upstream side of air circulation.

Under this state, in the 1st library outer heat-exchanger 3A, liquid refrigerants is cooled, temperature decline.That is, heat is handed over outside the 1st library Parallel operation 3A functions liquid refrigerants as supercooling heat exchanger.

The gaseous coolant in the 1st library outer heat-exchanger 3A is flowed into together with liquid refrigerants, it is also substantially the entirety of according to this cooling As liquid refrigerants.

Liquid refrigerants after supercooling is flowed out from the port 3Ab of the 1st library outer heat-exchanger 3A, and flows into piping route L3.

With in route of pipe line L3, liquid refrigerants enters expansion valve 7 by check-valves 8.

In expansion valve 7, liquid refrigerants expansion.So, liquid refrigerants gasifies and is promoted due to pressure and temperature reduction Into, and become the gas-liquid mixed refrigerant for being mixed with gas phase and liquid phase.

The gas-liquid mixed refrigerant flowed out from expansion valve 7 flows into the 2nd library outer heat-exchanger 3B from port 3Bb.

In the 2nd library outer heat-exchanger 3B, the gas-liquid mixed refrigerant flowed into from port 3Bb utilizes the heat with outside air Exchange obtains heat from outside air and evaporates, and becomes gaseous coolant, flows into from port 3Ba and matches route of pipe line L2.That is, the 2nd library Outer heat-exchanger 3B is functioned as evaporator.

It flows into the gaseous coolant in route of pipe line L2, from the port 2b of the four-way valve 2 for becoming Mode B by port 2c, stream Through hydraulic accumulator 6 and it is back to the suction inlet of compressor 1.

In heating operating herein, refrigerating plant 51 obtains following effect.

The switching that cooling operating with heating operating are carried out using four-way valve, it is not dynamic merely with compressor in heating operating Make heat obtained to heat up, also heat up using by library outer heat-exchanger from outside air heat obtained.Cause This, obtains higher heating ability.

The switching of cooling operating and heating operating, is carried out merely with the switching of four-way valve and solenoid valve, without basis The measurement result of pressure sensor etc. is controlled.Therefore, the control of motion is simple.

In the 2nd library outer heat-exchanger 3B, gas-liquid mixed refrigerant carries out the heat exchange that heat is obtained from outside air, becomes Low-pressure gaseous refrigerant.

In library outer heat-exchanger 3, multiple cooling fin 3f are with the heat exchange outside the 1st library outer heat-exchanger 3A and the 2nd library The mode of device 3B is arranged.Therefore, in the 1st library outer heat-exchanger 3A, the partial heat that liquid refrigerants is released is transferred to heat dissipation Piece 3f is simultaneously moved to the 2nd library outer heat-exchanger, as the phase change in the 2nd library outer heat-exchanger heat of evaporation and be utilized.

So, since the evaporation of the liquid refrigerants in the 2nd library outer heat-exchanger is promoted, it can be to prevent Only liquid refrigerants is sucked into compressor, i.e., the generation of so-called liquid hammer (returning liquid) phenomenon.

Also, i.e. convenient operating conditions be for example in cold district middle rolling car, when making accumulated snow on cooling fin 3f because of snowfall, The snow being attached on cooling fin 3f, also can because cooling fin 3f by the 1st library outer heat-exchanger with heating operates due to the heat that carries out Clearing house release heat and become to warm, to melt.

Also, each cooling fin 3f is in the part of the 2nd library side outer heat-exchanger 3B, due to the fact that and becoming temperature Heat: because downstream circulating using the outside air being warmed in the heat exchange of the 1st library outer heat-exchanger 3A；And using Heat exchange in 1st library outer heat-exchanger 3A assigns the heat of cooling fin 3f, transmits to the downstream side of cooling fin 3f.

So, since whole cooling fin 3f expeditiously warm, it extremely efficient prevents on cooling fin 3f Accumulated snow or frosting.

Therefore, the implementation interval of the defrosting movement of refrigerating plant 51 is elongated, and efficiency of movement improves.

In heating operating herein, in accumulator 4, liquid refrigerants delay is had no.On the other hand, correspond to includes in the C1 of library Thermic load including operating conditions, refrigerant circulation required for coolant loop changes.

Therefore, in the 1st library outer heat-exchanger 3A of refrigerating plant 51, there are liquid refrigerants and corresponding with operating conditions Amount gaseous coolant.

In other words, the 1st library outer heat-exchanger 3A replaces accumulator 4 remaining to adjust and ensure in heating operating Liquid refrigerants, to make to recycle the coolant quantity for having most suitable operating conditions in coolant loop.

So, the on high-tension side pressure of coolant loop can be maintained into higher value.

Therefore, the refrigerant condensation temperature in library inside heat exchanger 5 is got higher, and heating ability improves.

Refrigerating plant 51 makes to circulate in cooling operating with heating operating according to circulating direction limiting unit RK etc. is used The direction of refrigerant in library inside heat exchanger 5 is identical.Also, make to utilize the fortune of fan FM2 with heating operating in cooling operating Airflow direction caused by turning is also identical.

Also, as shown in Figure 9 and Figure 10, the circulating direction of the refrigerant in library inside heat exchanger 5 can be with are as follows: with air-supply side To (arrow DR2, DR4) it is opposite to mode, (flowed into from downstream side towards upstream side from downstream side, flowed out from upstream side).

With due to first-class, heat exchanger effectiveness and the heat exchanger effectiveness in heating operating in cooling operating it Between, apparent difference will not be generated.So, heat exchanger effectiveness further increases.

In cooling operating with heating operating, the coolant quantity being enclosed in coolant loop is identical.That is, due to being operated in heating In, therefore storing liquid refrigerant does not cool down the liquid refrigerants being stranded in accumulator 4 when operating, is heating up in accumulator 4 When operating, the amount of the liquid refrigerants is adjusted and ensured in the 1st library outer heat-exchanger 3A.

Specifically, the amount of ensuring of the liquid refrigerants in the 1st library outer heat-exchanger 3A is to utilize the gasification for making liquid refrigerants (amount of gaseous coolant) variation is measured to adjust.

Following knot is obtained according to experiment about the adjustment function of the liquid refrigerants amount in the outer heat-exchanger 3A of this 1st library By: it is more satisfactory to be, by the capacity Qa of the liquid refrigerants of the 1st library outer heat-exchanger 3A, it is set as cold no more than the liquid of accumulator 4 The value (that is, Qa≤Qb) of the capacity Qb of matchmaker.

The adjustment of this capacity Qa is set, and is carried out using the columns of the pipe 3c for example increased and decreased in the 1st library outer heat-exchanger 3A.

That is, N sections of M column of the 1st library outer heat-exchanger 3A, be a column therein are made to the sizing construction of specified vol, and This sizing construction is set side by side M along the air supply direction of fan FM1 to form.

At this point, more satisfactory be, the value of M is made to be no more than the capacity of accumulator 4 in the capacity of the 1st library outer heat-exchanger 3A Maximum value in range.

Then, defrosting operating is illustrated.

(defrosting of library inside heat exchanger 5 operates)

If carrying out cooling operating for a long time, it is possible to the icing of moisture contained in the air in the C1 of library can be made to frost, And it is attached on the cooling fin of library inside heat exchanger 5.Since the frosting on cooling fin can hinder heat exchange, it carries out in library The defrosting of heat exchanger 5 operates to defrost.

As shown in figure 11, this defrosting operating is different from heating fortune only in terms of making fan FM1 and fan FM2 stopping Turn.

(defrosting of library outer heat-exchanger 3 operates)

If carrying out heating operating for a long time, it is possible to the icing of moisture contained in outside air can be made to frost, and attached In on the cooling fin 3f of library outer heat-exchanger 3.

As described above, accumulated snow or frosting on the cooling fin 3f of library outer heat-exchanger 3 are extremely not easy in refrigerating plant 51 It generates.But when driving when making van cooler C in snowfall, if snowfall is obviously more, library outer heat-exchanger 3 it is upper It may also can be blocked between the cooling fin 3f of the adjoining of wind side (the 1st library side outer heat-exchanger 3A).

At this point, since heat exchange is hindered, the defrosting operating of library outer heat-exchanger 3 is carried out, it is real to cooling fin 3f Row snow melt and defrosting.

As shown in figure 11, this defrosting operating is different from cooling fortune only in terms of making fan FM1 and fan FM2 stopping Turn.

The design parameter of library outer heat-exchanger 3, such as setting are as follows:

The a of thickness E in the front-back direction (referring to Fig. 5): 19.05mm of 1st library outer heat-exchanger 3A

The b of thickness E in the front-back direction (referring to Fig. 5): 57.15mm of 2nd library outer heat-exchanger 3B

In the front-back direction overall thickness (Ea+Eb): 76.20mm

Height Ec (referring to Fig. 5): 355.6mm of up and down direction

Effective width (width of aeration portion) Ed (referring to Fig. 5): 1050mm of left and right directions

Coolant piping diameter (outer diameter): φ 9.53mm

Spacing Ee (referring to Fig. 4): 25.4mm of coolant piping

(when cooling operating (library outer heat-exchanger 3 is functioned as condenser))

Heat dissipation capacity: 4.8kW

Cold medium flux in coolant piping: about 1.14kg/min

The flow velocity of refrigerant in the piping of 1st library outer heat-exchanger 3A: 0.165m/s (liquid phase state)

The flow velocity of refrigerant in the piping of 2nd library outer heat-exchanger 3B: 1.05m/s (gas phase state)

0.11 meter/second (m/s) (liquid phase state)

(when heating operating (library outer heat-exchanger 3 is at least functioned as evaporator))

Caloric receptivity: 2.5kW

Cold medium flux in coolant piping: about 2.10kg/min

The flow velocity of refrigerant in the piping of 1st library outer heat-exchanger 3A: 0.260m/s (liquid phase state)

The flow velocity of refrigerant in the piping of 2nd library outer heat-exchanger 3B: 6.45m/s (gas phase state)

0.173m/s (liquid phase state)

The refrigerant temperature of the inlet of 1st library outer heat-exchanger 3A: 20 DEG C

The refrigerant temperature in the exit of the 1st library outer heat-exchanger 3A: 5 DEG C

The parameter setting of library outer heat-exchanger 3 is other specifications, with obtain especially in cooling operating heat dissipation capacity (on It states in example as 4.8kW).

As setting procedure example, firstly, since the 2nd library outer heat-exchanger 3B is played in cooling operating as condenser Function, and functioned when heating up operating as evaporator, accordingly, it is considered to which the parameter and heating when cooling operating operate When parameter, be set as 3 column (as condenser be 4 column) 14 section of 3 path (step " A ").

Then, using such as more preferably path said conditions, that is, Na < Nb, make the path 2 of the 1st library outer heat-exchanger 3A.Into one Step, make columns M the capacity of the 1st library outer heat-exchanger 3A no more than accumulator 4 capacity in the range of maximum value and calculate Out 1.

In such step, specification is set as 14 section of 2 path of such as 1 column (step " B ").

As described above, library outer heat-exchanger 3 can benefit when having accumulated snow on the cooling fin 3f of the 1st library outer heat-exchanger 3A Melt this snow with heating operating.

As long as the 1st library outer heat-exchanger 3A releases the heat for making snow melting, extra heat is only expended in right The water melted is heated up and is made a futile effort.

Also, since accumulated snow spreads the entire suction plane of the 1st library outer heat-exchanger 3A, it is therefore preferable that be, and non local melt Change, but thawing region is made to be scattered in entire suction plane as far as possible.

As shown in parameter example, the difference of the refrigerant temperature of entrance and outlet in the 1st library outer heat-exchanger 3A is such as 15 ℃(deg)。

For example, entrance is upper side if making number of path Na 1, exports as lower side, upper side will only be made to become most High temperature, lower side become lowest temperature, generate the temperature gradient of mitigation in above-below direction.

It therefore, is to be divided into two parts in above-below direction when generating thawing region and non-thawing region.

In this regard, making number of path Na such as embodiment equally be 2, by the substantial shared area in each path in suction plane Domain is separated into upper side and is arranged with lower side.Further, it is possible to which the entrance in a path is arranged in side above, it is arranged in lower side The outlet in another path, the path of the outlet and lower side in the path of central part configuration upper side in above-below direction enter Mouthful.

At this point, due to suction plane up and down direction temperature gradient from upper side side downward, be in " high-low-high- It is low ", therefore when melting region and non-thawing region, alternately 2 thawings of appearance and non-melt are " the non-thawing-of thawing-when existing Thawing-non-thawing ＂.Therefore, it is more preferred by dispersion to melt region.

Since number of path Na is bigger, this dispersion extends finer and smoothlyer, therefore more preferably.

Also, number of path Na is bigger, and high temperature range is not also concentrated and dispersed.Therefore, be able to suppress to the water of thawing into The releasing of the extra heat of row heating, thus preferably.

So, preferably make 2 or more number of path Na.

The library outer heat-exchanger 3 and refrigerating plant 51 of embodiment are not limited to above structure, of the invention not departing from In the range of main idea, change case can also be made.

(change case 1)

Change case 1 is in the coolant loop of refrigerating plant 51, and in library, the upstream side of inside heat exchanger 5 matches route of pipe line L6 With downstream side between route of pipe line L8, setting carries out the gas-liquid heat exchanger 17 (refrigerating plant 51A) of heat exchange (referring to figure 12) example.Figure 12 is the main coolant loop (ginseng with refrigerating plant 51 indicated in the coolant loop of refrigerating plant 51A According to Fig. 1) the minor loop figure of different part.

Gas-liquid heat exchanger 17 is connected between solenoid valve 11 and expansion valve 12 relative to route of pipe line L6 is matched.Also, phase For matching route of pipe line L8, it is connected between library inside heat exchanger 5 and difference unit D3.

In the cooling operating of refrigerating plant 51A, refrigerant matching in tube portion by thick line expression shown in Figure 12, Xiang Jian The direction circulation of head.

The liquid refrigerants of expansion valve 12 will be entered in cooling operating, before this, in gas-liquid heat exchanger 17 with The gaseous coolant flowed out from library inside heat exchanger 5 carries out heat exchange and is cooled, and degree of supercooling increases.

So, since the heat using the heat exchange in library inside heat exchanger 5, obtained from the air in the C1 of library increases Add, therefore, improves ability cooling in the C1 of library.

Also, due to the evaporation that can further promote the liquid refrigerants in library inside heat exchanger 5, accordingly it is possible to prevent The generation of the liquid hit phenomenon of compressor 1.

On the other hand, in heating operating, liquid refrigerants is not circulated in route of pipe line L6, but circulates in the route of pipe line L7, therefore gas-liquid heat exchanger 17 does not generate effect.

(change case 2)

Relative to refrigerating plant 51, change case 2 has two or more library inside heat exchangers (refrigerating plant 51B).Herein, Referring to Fig.1 3, the example for having two libraries inside heat exchanger 25A, 25B is illustrated.Figure 13 is mainly to be painted refrigerating plant The minor loop figure with coolant loop (referring to Fig.1) different piece of refrigerating plant 51 of the coolant loop of 51B.

As shown in figure 13, refrigerating plant 51B is connected in parallel between accumulator 4 and difference unit D3 containing fan FM25A Library inside heat exchanger 25A and the library inside heat exchanger 25B containing fan FM25B.

It is connected with expansion valve 22A in the upstream side (4 side of accumulator) of library inside heat exchanger 25A, in library inside heat exchanger 25B Upstream side be connected with expansion valve 22B.

The upstream side of expansion valve 22A, 22B merge into a route, are connected to accumulator 4 via solenoid valve 23.

Between library inside heat exchanger 25A and expansion valve 22A between accumulator 4, it is equipped with solenoid valve 21A.

Between library inside heat exchanger 25B and expansion valve 22B between accumulator 4, it is equipped with solenoid valve 21B.

The downstream side of expansion valve 22A, 22B merge into a route, are connected to difference unit D3.

The movement of fan FM25A and fan FM25B and solenoid valve 21A and solenoid valve 21B, according to control unit 31 by Control.

This refrigerating plant 51B, such as it is placed in the van cooler for having the library that maintain two of constant temperature or more.

Library inside heat exchanger 25A and library inside heat exchanger 25B is cooled down and is heated up with the inside to respectively different libraries Mode be arranged.

The quantity of solenoid valve and position etc. are not limited to example shown in Figure 13.

According to this change case 2, can use combine each solenoid valve 21A, 21B, 23 opening state and closed state, respectively Independently carry out the cooling or heating in two or more libraries.For example, can be only by specific one or specific two or more Library is cooling or is cooled down whole libraries.

Change case 1 can be made to be appropriately combined with change case 2.

Circulating direction limiting unit RK is not limited to constitute using two or more check-valves, but according to using non-return Valve can use lower at original composition circulating direction limiting unit RK.

(change case 3)

In change case 3, refrigerating plant 51 is made to become refrigerating plant 57, the refrigerating plant 57 has and do not have circulation side To limiting unit RK and cooling operating can be carried out and the coolant loop operated that heats up.

The structure of refrigerating plant 57 is illustrated in this coolant loop figure i.e. Figure 14 and is painted in Figure 15 of control system.

That is, the coolant loop relative to refrigerating plant 51, the coolant loop of refrigerating plant 57 deletes circulating direction limiting unit RK, and become shunt circuit LP2 and solenoid valve 11 and solenoid valve 13 are replaced with into check-valves 71 respectively and check-valves 73 forms Shunt circuit LP72.Structure in addition to this is identical.

This structure due to not having circulating direction limiting unit RK, circulate in the side of the refrigerant in library inside heat exchanger 5 To opposite in cooling operating is operated with heating.

That is, when refrigerant flows into library inside heat exchanger 5 from accumulator 4, being circulated in the route of pipe line in the LP72 of shunt circuit L76；And when refrigerant circulates from library inside heat exchanger 5 to accumulator 4, it circulates in route of pipe line L77.

About the cooling operating and heating operating of this refrigerating plant 57, it is illustrated referring especially to Figure 16-Figure 18.

The figure of coolant loop when Figure 16 is to illustrate that cooling operates.Figure 17 is to illustrate refrigerant when heating operating The figure in circuit.Figure 18 is the table to the control of the control unit 31 when illustrating each operating.Figure 17 and Figure 18, with Fig. 9 and Figure 10 In the same manner, the piping position that refrigerant flows is painted with thick line, the flow direction of refrigerant is painted along piping with arrow.

(cooling operating)

As shown in the table of Figure 18, in the cooling operating of refrigerating plant 57, control unit 31 makes 2 Mode A of four-way valve, wind Fan FM1 and fan FM2 is operating condition.

The air supply direction as caused by fan FM1 and fan FM2 in this cooling operating, in Figure 16, respectively with arrow DR71 and arrow DR72 are painted.

From the phase of the refrigerant of the port 3Ba to port 3Aa of library outer heat-exchanger 3 and the effect of library outer heat-exchanger 3, It is identical as the cooling operating of refrigerating plant 51.

That is, outside cooling down in operating in refrigerating plant 57, the 2nd library outer heat-exchanger 3B of library outer heat-exchanger 3 and the 1st library Heat exchanger 3A, integrally functions as condenser.

So, gaseous coolant radiates for outside air and condenses, from port 3Aa in the form of high-pressure liquid refrigerant It flows into and matches route of pipe line L5.

It flows into the refrigerant in route of pipe line L5, it is substantially the entirety of under high pressure to become liquid phase.

This liquid refrigerants flows through accumulator 4 and flows into shunt circuit LP72.

In the LP72 of shunt circuit, only allows liquid refrigerants according to check-valves 71 and towards flowing into route of pipe line L76, go forward side by side Enter expansion valve 72.

In expansion valve 72, liquid refrigerants expansion.So, liquid refrigerants is due to pressure and temperature reduction, and gasify quilt Promote, and becomes the gas-liquid mixed refrigerant that gas phase is mixed with liquid phase.

The gas-liquid mixed refrigerant flowed out from expansion valve 72, flows into library inside heat exchanger 5.

In library inside heat exchanger 5, fan FM2 is in operating condition according to the control of control unit 31, makes in the C1 of library Air is flowed to the direction of the arrow DR72 of Figure 16.

In this case, the air in gas-liquid mixed refrigerant and library C1 carries out heat exchange, obtains heat from the air in the C1 of library Amount, completely it is vaporization and become gaseous coolant.That is, library inside heat exchanger 5 is functioned as evaporator, it is cold in the C1 of library But.

The gaseous coolant flowed out from library inside heat exchanger 5, which flows into, matches route of pipe line L8.

In refrigerating plant 57, with route of pipe line L8 by between library inside heat exchanger 5 and the port 2d of four-way valve 2 not divaricately Connection.Therefore, gaseous coolant flows through port 2c, further, flows through hydraulic accumulator 6 from the port 2d for the four-way valve 2 for becoming Mode A And it is back to the suction inlet of compressor 1.

(heating operating)

As shown in the table of Figure 18, in the heating operating of refrigerator 57, control unit 31 makes 2 Mode B of four-way valve, fan FM1 and fan FM2 is operating condition.

The air supply direction as caused by fan FM1 and fan FM2 in this heating operating is identical as cooling operating, is certain Direction, be painted respectively with arrow DR73 and arrow DR74 in Figure 17.

As shown in figure 17, according to the control of control unit 31, the high-pressure gaseous refrigerant that is spued by the discharge opening of compressor 1 from It flows by port 2d for the port 2a of the four-way valve 2 of Mode B and matches route of pipe line L8.

In refrigerating plant 57, as described above, with route of pipe line L8 by the port 2d of four-way valve 2 and library inside heat exchanger 5 it Between without divaricately connecting.

Therefore, gaseous coolant flows into the direction of library inside heat exchanger 5, flows into library inside heat exchanger 5 in cooling operate It is contrary.

In library inside heat exchanger 5, as described above, fan FM2 is in operating condition, library according to the control of control unit 31 Air in C1 is flowed to the direction arrow DR74 of Figure 17.

In this case, the air in gaseous coolant and library C1 carries out heat exchange, releases heat in the air in Xiang Ku C1, It is condensed, essentially becomes high-pressure liquid refrigerant.Therefore, it is warmed in the C1 of library.

The liquid refrigerants flowed out from library inside heat exchanger 5, flow through shunt circuit LP72 matches pipeline with check-valves 73 Road L77 and accumulator 4, by the 1st library outer heat-exchanger 3A for flowing into library outer heat-exchanger 3 from port 3Aa with route of pipe line L5.

In library outer heat-exchanger 3, according to the control of control unit 31, fan FM1 is in operating condition, and outside air is to figure 17 direction arrow DR73 flowing.Therefore, the 1st library outer heat-exchanger 3A is located at external empty relative to the 2nd library outer heat-exchanger 3B The upstream side of the circulation of gas.

In this case, in the 1st library outer heat-exchanger 3A, liquid refrigerants is cooled, temperature decline.That is, hot outside the 1st library Exchanger 3A functions liquid refrigerants as supercooling heat exchanger.

The gaseous coolant in the 1st library outer heat-exchanger 3A is flowed into together with liquid refrigerants, it is also substantially complete according to this cooling Portion becomes liquid refrigerants.

With in route of pipe line L3, liquid refrigerants enters expansion valve 7 via check-valves 8.

In expansion valve 7, liquid refrigerants expansion.So, liquid refrigerants gasifies and is promoted due to pressure and temperature reduction Into, and become the gas-liquid mixed refrigerant that gas phase is mixed with liquid phase.

In the 2nd library outer heat-exchanger 3B, the gas-liquid mixed refrigerant flowed into from port 3Bb utilizes the heat with outside air Exchange obtains heat from outside air and evaporates, and becomes gaseous coolant, flows into from port 3Ba and matches route of pipe line L2.That is, outside the 2nd library Heat exchanger 3B is functioned as evaporator.

Then, the defrosting operating of refrigerating plant 57 is illustrated.

(defrosting of library inside heat exchanger 5 operates)

Even if in refrigerating plant 57, if carrying out cooling operating for a long time, moisture contained in the air in the C1 of library It may also can freeze and frost, and be attached on the cooling fin of library inside heat exchanger 5.Since the frosting on cooling fin can hinder hot friendship It changes, therefore, the defrosting for carrying out library inside heat exchanger 5 operates to defrost.

As shown in the table of Figure 18, this defrosting operating is different from rising only in terms of making fan FM1 and fan FM2 stopping Temperature operating.

(defrosting of library outer heat-exchanger 3 operates)

Even if, if carrying out heating operating for a long time, moisture contained in outside air can also in refrigerating plant 57 It can freeze and frost, and be attached on the cooling fin 3f of library outer heat-exchanger 3.

In refrigerating plant 57, the effect of library outer heat-exchanger 3 is identical as refrigerating plant 51.Therefore, library outer heat-exchanger 3 Cooling fin 3f on accumulated snow or frosting be extremely not likely to produce.

But when driving a vehicle when making van cooler C in snowfall, if snowfall is obviously more, the windward of library outer heat-exchanger 3 It may also can be blocked between the cooling fin 3f of the adjoining of side (the 1st library side outer heat-exchanger 3A).

At this point, cannot function as heat exchanger since heat exchange is hindered and function, therefore, carries out heat outside library and hand over The defrosting of parallel operation 3 operates, and carries out snow melt and defrosting to cooling fin 3f.

As shown in the table of Figure 18, this defrosting operating is different from cold only in terms of making fan FM1 and fan FM2 stopping But it operates.

Refrigerating plant 57 especially in heating operating, obtains following effect.

In library outer heat-exchanger 3, multiple cooling fin 3f are to be across heat friendship outside the 1st library outer heat-exchanger 3A and the 2nd library The mode of parallel operation 3B is arranged.Therefore, in the 1st library outer heat-exchanger 3A, the partial heat that liquid refrigerants is released is transferred to scattered Backing 3f is simultaneously moved to the 2nd library outer heat-exchanger 3B, as the phase change in the 2nd library outer heat-exchanger 3B heat of evaporation and by It utilizes.

So, since the evaporation of the liquid refrigerants in the 2nd library outer heat-exchanger 3B is promoted, it can be with Liquid refrigerants is prevented to be sucked into compressor 1, i.e., the generation of so-called liquid hit phenomenon.

Also, even if operating conditions are the driving for example in cold district, when making accumulated snow on cooling fin 3f because of snowfall, The snow being attached on cooling fin 3f, also can because cooling fin 3f by the 1st library outer heat-exchanger with heating operates due to the heat that carries out Clearing house release heat and become to warm, to melt.

Also, the part of multiple each comfortable 2nd library sides outer heat-exchanger 3B cooling fin 3f, due to the fact that and becoming temperature Heat: because downstream circulating using the outside air being warmed in the heat exchange of the 1st library outer heat-exchanger 3A；And using Heat exchange in 1st library outer heat-exchanger 3A assigns the heat of cooling fin 3f, transmits to the downstream side of cooling fin 3f.

Therefore, the implementation interval of the defrosting movement of refrigerating plant 57 is elongated, and efficiency of movement improves.

Also, the 1st library outer heat-exchanger 3A has two or more path Ps 1, P2, and each path configures in the following way, That is, not being overlapped substantially on air supply direction (front-rear direction), become the independent region of essence in suction plane.

So, since the unevenness of the surface temperature of suction plane is suppressed, it is attached on cooling fin 3f Snow equably melts.

(change case 4)

Connect the shunt circuit of the port 3Bb of the port 3Ab and the 2nd library outer heat-exchanger 3B of the 1st library outer heat-exchanger 3A LP1 (referring to Fig.1, Fig. 4, Fig. 9 and Figure 10), alternatively 4, the shunt circuit LP1a of no check-valves 8 can also be substituted for.

In Figure 19, this shunt circuit LP1a is shown.

(other change case)

At least one of library outer heat-exchanger 3 and library inside heat exchanger 5 are not limited to above-mentioned fin and tube type heat exchange Device.It is also possible to such as coil pipe type (serpentine) or parallel type (parallel flow), will also obtains at this time identical Effect.

For library outer heat-exchanger 3 be not fin tube type heat exchanger the case where, be described in detail.

Firstly, preparing the heat exchanger of two coil pipe types or parallel type, it is set side by side in the longitudinal direction.Moreover, respectively Link coolant piping, makes one of heat exchanger as the 1st library outer heat-exchanger 3A, and another heat exchanger is as the 2nd Library outer heat-exchanger 3B and function.Further, multiple heat exchange fins are respectively relative to the cold of two heat exchangers Matchmaker's piping is installed by a manner of, makes two heat exchanger integrations.

The above embodiments and each change case, can also combine as far as possible and implement.

For example, change case 1 can be made to combine with change case 3, and gas-liquid heat exchanger 17 is applied to refrigerating plant 57.

At this point, solenoid valve 11 is replaced with check-valves 71 in part represented by Figure 12 of coolant loop, by solenoid valve 13 Replace with check-valves 73.

Claims

1. a kind of freezer heat exchanger, which is used as the fin and tube type of the library outer heat-exchanger for refrigerating plant Freezer heat exchanger, the refrigerating plant have the refrigerant including library inside heat exchanger and library outer heat-exchanger return Road can selectively carry out making cooling operating cooling in library and make the heating to heat up in library operating, which is characterized in that have

1st heat exchanger, the 1st heat exchanger have the 1st coolant piping route,

2nd heat exchanger, the 2nd heat exchanger have the 2nd coolant piping line being connected in series with aforementioned 1st coolant piping route Road, and be set side by side with aforementioned 1st heat exchanger,

Pressure fan, the pressure fan blow to aforementioned 1st heat exchanger and aforementioned 2nd heat exchanger,

The piping of aforementioned 1st coolant piping route and the piping of aforementioned 2nd coolant piping route are with orthogonal hot through the aforementioned 1st The mode of exchanger and the 2nd respective cooling fin of heat exchanger links,

It is multiple paths of Na that aforementioned 1st coolant piping route, which has number of path, and aforementioned 2nd coolant piping route has number of path For multiple paths of Nb, wherein the integer that Na is 2 or more, the integer that Nb is 3 or more, and aforesaid paths number Na and aforesaid paths Number Nb meets 2≤Na≤Nb,

When aforementioned pressure fan is blown, aforementioned 1st heat exchanger is disposed in parallel in upstream side, and aforementioned 2nd heat exchanger is set side by side In downstream side,

It, will in aforementioned 1st heat exchanger after condensing gaseous coolant in aforementioned 2nd heat exchanger in aforementioned cooling operating It is not condensed by the aforementioned gaseous coolant that aforementioned 2nd heat exchanger condenses, while increasing the degree of supercooling of condensed refrigerant,

In aforementioned heating operating, after increasing degree of supercooling in aforementioned 1st heat exchanger, by liquid refrigerants in aforementioned 2nd heat exchange Device is evaporated as evaporator.

2. freezer heat exchanger as described in claim 1, wherein in the air supply direction of aforementioned pressure fan, the aforementioned 1st Coolant piping route is formed as a column, and aforementioned 2nd coolant piping route is formed as multiple row.

3. freezer heat exchanger as claimed in claim 1 or 2, wherein aforementioned 1st coolant piping route with it is aforementioned Has expansion valve between 2nd coolant piping route, the expansion valve is only before aforementioned refrigerant is flowed to from aforementioned 1st coolant piping route It states and is functioned in the aforementioned heating operating of the 2nd coolant piping route.