CN212692267U

CN212692267U - Refrigerating device

Info

Publication number: CN212692267U
Application number: CN202021435916.7U
Authority: CN
Inventors: 黄粤宁; 张硕林
Original assignee: Ningbo Fine Brewing Valley Technology Co ltd
Current assignee: Ningbo Fine Brewing Valley Technology Co ltd
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2021-03-12
Anticipated expiration: 2030-07-20

Abstract

The invention discloses a refrigerating device, and relates to the field of refrigerating equipment structures. Provides a refrigerating device with high space utilization rate and small occupied area. The device comprises a cold air generating device, wherein the cold air generating device comprises a central pipe for guiding out cold air, the central pipe is vertically arranged, and a plurality of cold air holes are formed in the side wall of the central pipe; the refrigerating device further comprises a plurality of vertically arranged refrigerating chambers which are uniformly distributed around the central tube along the circumferential direction, and each refrigerating chamber is communicated with the central tube through a cold air hole. Has the advantages of exquisite structure, convenient use, good refrigeration effect, high space utilization rate, small occupied area and the like on the whole.

Description

Refrigerating device

Technical Field

The invention relates to the field of refrigeration equipment structures.

Background

At present, for satisfying the simultaneous refrigeration to a plurality of targets, generally need to adopt a plurality of refrigeration plant to carry out the synchronization work, not only the energy consumption is high, a plurality of refrigeration plant will also occupy very big space, wherein, representative like a chinese utility model patent of "constant temperature type fresh and alive aquatic products transport case", application number "201821213180.1" that the country announced in 2019 8 months and 6 days, this case is equipped with a plurality of components of a whole that can function independently boxes in the thermostatted container, all coil on the inner wall of each components of a whole that can function independently case and be equipped with independent constant temperature cooling tube, thereby realize the refrigeration to a plurality of components of a whole that can function independently cases.

However, when refrigerating the same kind of objects, as represented by refrigerating beer, people usually separately pack beer with different tastes in different tanks and refrigerate each tank through a refrigerating device; if the common independent refrigeration structural design in the prior art is adopted, the beer has a plurality of flavors, so that the equipment integrally occupies a larger space, and meanwhile, the equipment generates larger energy waste during respective refrigeration and has larger load on each electronic element in the equipment.

Disclosure of Invention

Aiming at the problems, the invention provides the refrigerating device which has the advantages of exquisite structure, convenient use, good refrigerating effect, high space utilization rate and small occupied area.

The technical scheme of the invention is as follows: the device comprises a cold air generating device 1, wherein the cold air generating device 1 comprises a central pipe 2 for guiding out cold air, the central pipe 2 is vertically arranged, and a plurality of cold air holes 20 are formed in the side wall of the central pipe 2;

the refrigerating device also comprises a plurality of vertically arranged refrigerating chambers 3, wherein the refrigerating chambers 3 are uniformly distributed around the central tube 2 along the circumferential direction, and each refrigerating chamber 3 is communicated with the central tube 2 through a cold air hole 20.

A plurality of partition plates 4 are fixedly connected to the side wall of the central tube 2, so that a plurality of refrigeration chambers 3 are partitioned around the central tube 2.

The top of refrigeration cavity 3 is sealed through roof 5, and the bottom is sealed through bottom plate 6, one side swing joint that refrigeration cavity 3 kept away from center tube 2 has cavity door 7.

One side of the partition plate 4, which is far away from the central pipe 2, is fixedly connected with heat-insulating upright columns 41, and a chamber door 7 which can be opened or closed is arranged between the adjacent heat-insulating upright columns 41;

the tops of the plurality of partition plates 4 are fixedly connected with a top plate 5, so that the tops of the refrigeration chambers 3 are sealed; the bottoms of the plurality of partition plates 4 are fixedly connected with a bottom plate 6 for sealing the bottom end of the central tube 2, so that the bottom of the refrigeration chamber 3 is sealed;

when the chamber door 7 is closed, the sealing between the chamber door 7 and the heat preservation upright 41 is kept, and meanwhile, the sealing between the chamber door 7 and the top plate 5 and between the chamber door 7 and the bottom plate 6 is also kept.

The heat-preservation upright column 41 comprises a first outer metal plate 411, a first inner metal plate 412 and a first heat-insulation support frame 413;

the inner metal plate I412 is fixedly connected with one side of the partition plate 4 far away from the central tube 2, and the outer metal plate I411 is fixedly connected with the outer side of the inner metal plate I412 through an insulation support frame I413, so that the insulation support frame I413 insulates heat between the outer metal plate I411 and the inner metal plate I412.

The top plate 5 comprises a second outer metal plate 51, a second inner metal plate 52 and a second heat insulation support frame 53;

the bottom of the inner side metal plate II 52 is fixedly connected with the tops of the plurality of partition plates 4, and the outer side metal plate II 51 is fixedly connected above the inner side metal plate II 52 through a heat insulation support frame II 53, so that the heat insulation support frame II 53 performs heat insulation between the outer side metal plate II 51 and the inner side metal plate II 52.

The bottom plate 6 comprises an outer side metal plate III 61, an inner side metal plate III 62 and a heat insulation support frame III 63;

the top of the inner side metal plate III 62 is fixedly connected with the bottoms of the plurality of partition plates 4, and the outer side metal plate III 61 is fixedly connected below the inner side metal plate III 62 through a heat insulation support frame III 63, so that the heat insulation support frame III 63 performs heat insulation between the outer side metal plate III 61 and the inner side metal plate III 62.

The end surface of the heat-insulating upright column 41 facing the cavity door 7, the end surface of the top plate 5 facing the cavity door 7 and the end surface of the bottom plate 6 facing the cavity door 7 are fixedly connected with strip-shaped sealing gaskets 8; the chamber door 7 is provided with a plurality of accommodating grooves for accommodating the sealing gaskets 8 on the surface facing the refrigeration chamber 3.

The sealing gasket 8 comprises a strip-shaped body, and one side of the body, which faces away from the chamber door 7, is provided with at least one buffer cavity 81 arranged along the length direction of the body;

one side of the body facing the cavity door 7 is provided with a hollow rib 82 which is connected with the body into a whole, and the hollow rib 82 is matched with the accommodating groove;

the two sides of the body are provided with a plurality of buffering convex wings 83 which are connected with the body into a whole, and the buffering convex wings 83 incline towards one side where the cavity door 7 is located.

At least one horizontally arranged interlayer 30 is arranged in the refrigeration cavity 3, and a plurality of communicating holes are formed in the interlayer 30.

The cold air generating device 1 further comprises a compressor, a condenser, a fan 11 and an evaporator 12, the cold air generating device comprises an equipment cavity 13 and a working cavity 14, a heat insulation layer 15 is arranged between the equipment cavity 13 and the working cavity 14, the working cavity 14 is communicated with all the refrigeration cavities 3, and the working cavity 14 is communicated with the top end of the central tube 2;

the compressor and the condenser are fixedly connected in an equipment cavity 13, the evaporator 12 and the fan 11 are fixedly connected in a working cavity 14, the fan 11 is arranged at the top of the central tube 2, one side of the evaporator 12 is connected with the compressor, and the other side of the evaporator is connected with the condenser.

According to the invention, the structural layout that the central pipe is used for refrigerating the peripheral refrigerating chambers is adopted, on one hand, compared with a plurality of refrigerating chambers which are adjacently arranged, the occupied space of the refrigerating device on the whole can be obviously reduced, and the space utilization rate is higher; on the other hand, the refrigeration of all the refrigeration chambers is simultaneously completed by one set of cold air generating device, and compared with the independent refrigeration of each refrigeration chamber, the energy consumption is lower. The invention has the advantages of exquisite structure, convenient use, good refrigeration effect, high space utilization rate, small occupied area and the like on the whole.

Drawings

FIG. 1 is a schematic structural diagram of the present application,

figure 2 is a perspective view of figure 1,

figure 3 is a plan view of a first embodiment of the refrigeration chamber in the present case,

figure 4 is a top view of a second embodiment of the refrigeration chamber of the present case,

figure 5 is a schematic view of the working state of the present invention,

FIG. 6 is a schematic structural view of the heat-insulating column in the present case;

figure 7 is a schematic structural view of the top plate in the present case,

FIG. 8 is a schematic structural diagram of the base plate in the present case;

FIG. 9 is a schematic structural diagram of the spacer in the present case;

in the figure, 1 is a cold air generating device, 11 is a fan, 12 is an evaporator, 13 is an equipment cavity, 14 is a working cavity, and 15 is a heat insulation layer;

2 is a central tube, 20 is a cold air hole, 3 is a refrigeration chamber, 4 is a partition plate, and 41 is a heat preservation upright post; 411 is a first outer metal plate, 412 is a first inner metal plate, and 413 is a first heat insulation support frame;

5 is a top plate, 51 is an outer side metal plate II, 52 is an inner side metal plate II, and 53 is a heat insulation support frame II;

6 is a bottom plate, 61 is an outer side metal plate III, 62 is an inner side metal plate III, and 63 is a heat insulation support frame III;

7 is a chamber door; 8 is a sealing gasket, 81 is a buffer cavity, 82 is a hollow convex rib, and 83 is a buffer convex wing.

Detailed Description

In order to clearly explain the technical features of the present patent, the following detailed description of the present patent is provided in conjunction with the accompanying drawings.

As shown in fig. 1 to 8, the invention comprises a cold air generating device 1, wherein the cold air generating device 1 comprises a central tube 2 for guiding out cold air, the central tube 2 is vertically arranged, and a plurality of cold air holes 20 are formed in the side wall of the central tube 2;

the refrigerating device also comprises a plurality of vertically arranged refrigerating chambers 3, wherein the refrigerating chambers 3 are uniformly distributed around the central tube 2 along the circumferential direction of the central tube, and each refrigerating chamber 3 is communicated with the central tube 2 through a cold air hole 20. In this way, the cold air in the central tube flows from top to bottom and is diffused to the surrounding refrigerating chambers through the cold air holes on the side wall of the central tube, so that all the refrigerating chambers are synchronously refrigerated.

The number of the refrigerating chambers 3 is n, and n is an integer greater than 1.

A plurality of cold air holes 20 distributed on the same plumb line from top to bottom form a cold air hole group, and a plurality of cold air hole group groups are uniformly arranged on the side wall of the central tube 2; the refrigeration chamber 3 is in communication with the central tube 2 through at least one cold gas vent array. As shown in fig. 5, on one hand, the high-efficiency refrigeration of the refrigeration chamber can be realized by the cold air column group; on the other hand, when in actual use, the number of the cold air hole array groups communicated with each refrigerating chamber is the same, so that the refrigerating effect of the central pipe on each refrigerating chamber is more uniform.

A plurality of separators 4 distributed in a multi-fork star shape are fixedly connected to the side wall of the central tube 2, so that a plurality of refrigeration chambers 3 are partitioned around the central tube 2. Preferably, the partitions have six partitions, so that the first embodiment of the overall shape of the refrigerator, i.e. the hexagonal prism shape as shown in fig. 3; and a second embodiment, cylindrical as shown in FIG. 4; has the advantages of beautiful appearance, convenient use, small occupied area, high utilization rate of vertical space and the like on the whole.

Further, one side of the partition plate 4, which is far away from the central pipe 2, is fixedly connected with heat-insulating upright columns 41, and a chamber door 7 which can be opened or closed is arranged between the adjacent heat-insulating upright columns 41;

when the chamber door 7 is closed, the sealing between the chamber door 7 and the heat preservation upright 41 is kept, and meanwhile, the sealing between the chamber door 7 and the top plate 5 and between the chamber door 7 and the bottom plate 6 is also kept. After the chamber door is closed, each refrigerating chamber can form a refrigerating space isolated from the outside and communicated with the central pipe. Thereby guaranteeing the refrigerating effect of the central pipe on each refrigerating chamber. Wherein, the heat insulation layer between the equipment cavity and the working cavity in the cold air generating device is also formed by the top plate.

Further, cavity door 7, heat preservation stand 41, roof 5 and bottom plate 6 all are hollow form, and the inside of four all is equipped with the heat preservation. Therefore, the refrigeration cavity can keep better temperature isolation effect with the outside, and the refrigeration effect of the refrigeration cavity on the target object can be ensured.

As shown in fig. 6, the heat-insulating upright 41 comprises a first outer metal plate 411, a first inner metal plate 412 and a first heat-insulating support frame 413;

the inner metal plate I412 is fixedly connected with one side of the partition plate 4 far away from the central tube 2, and the outer metal plate I411 is fixedly connected with the outer side of the inner metal plate I412 through an insulation support frame I413, so that the insulation support frame I413 insulates heat between the outer metal plate I411 and the inner metal plate I412. And an insulating layer is filled between the outer side metal plate I411 and the inner side metal plate I412. The outer side metal plate I is in direct contact with the air outside the refrigerating device, and the inner side metal plate I is in direct contact with the cavity, so that the outer side metal plate I and the inner side metal plate I are effectively isolated by the heat insulation support frame I, on one hand, electric leakage can be effectively prevented, on the other hand, the integral heat conduction capacity of the heat insulation upright column can be remarkably reduced, and the refrigerating effect of the refrigerating device can be ensured;

as shown in fig. 7, the top plate 5 includes a second outer metal plate 51, a second inner metal plate 52 and a second heat insulation support 53;

the bottom of the inner side metal plate II 52 is fixedly connected with the tops of the plurality of partition plates 4, the outer side metal plate II 51 is fixedly connected above the inner side metal plate II 52 through a heat insulation support frame II 53, namely the heat insulation support frame II 53 is fixedly connected at the edge of the inner side metal plate II 52, the outer side metal plate II 51 is positioned below the inner side metal plate II 52, and the outer side metal plate II 51 is fixedly connected with the heat insulation support frame II 53, so that the heat insulation support frame II 53 conducts heat insulation between the outer side metal plate II 51 and the inner side metal plate II 52. And an insulating layer is filled between the second outer metal plate 51 and the second inner metal plate 52.

As shown in fig. 8, the bottom plate 6 includes an outer metal plate three 61, an inner metal plate three 62 and a heat insulation support frame three 63;

the top of the third inner metal plate 62 is fixedly connected with the bottoms of the plurality of partition plates 4, the third outer metal plate 61 is fixedly connected below the third inner metal plate 62 through a third heat insulation support frame 63, namely, the third heat insulation support frame 63 is fixedly connected at the edge of the third inner metal plate 62, the third outer metal plate 61 is positioned below the third inner metal plate 62, and the third outer metal plate 61 is fixedly connected with the third heat insulation support frame 63, so that the third heat insulation support frame 63 insulates heat between the third outer metal plate 61 and the third inner metal plate 62. And an insulating layer is filled between the outer side metal plate III 61 and the inner side metal plate III 62.

Similarly, the outer side metal plate II and the outer side metal plate III are directly contacted with the outside of the refrigerating device, and the inner side metal plate II and the inner side metal plate III are directly contacted with the cavity; like this, through the effective isolation of thermal-insulated support frame two between outside metal sheet two, inboard metal sheet two, through the effective isolation of thermal-insulated support frame three between outside metal sheet three, inboard metal sheet three, can effectively prevent the electric leakage on the one hand, on the other hand also can show the heat-conduction ability that reduces on roof and the bottom plate to guarantee cold-storage device's cold-stored effect.

As shown in fig. 6-8, the end surface of the heat-insulating upright 41 facing the chamber door 7, the end surface of the top plate 5 facing the chamber door 7, and the end surface of the bottom plate 6 facing the chamber door 7 are fixedly connected with strip-shaped gaskets 8; the chamber door 7 is provided with a plurality of accommodating grooves for accommodating the sealing gaskets 8 on the surface facing the refrigeration chamber 3. Therefore, the sealing gasket plays a better role in buffering the door closing impact and improving the sealing performance on the inner side of the chamber door.

As shown in fig. 6-8, the gasket 8 includes an elongated body, and one side of the body facing away from the chamber door 7 is provided with at least one buffer cavity 81 arranged along the length direction thereof; when the chamber door is closed, the sealing effect between the heat-insulating upright post, the top plate or the bottom plate and the sealing gasket can be effectively ensured by means of the elastic deformation of the buffer cavity;

one side of the body facing the cavity door 7 is provided with a hollow rib 82 which is connected with the body into a whole, and the hollow rib 82 is matched with the accommodating groove; therefore, after the cavity door is closed, the hollow convex edge can be clamped into the accommodating groove, and the sealing performance between the cavity door and the sealing gasket can be effectively improved by means of the hollow convex edge;

the two sides of the body are provided with a plurality of buffering convex wings 83 which are connected with the body into a whole, and the buffering convex wings 83 incline towards one side where the cavity door 7 is located. Therefore, the impact force generated by closing the door can be further relieved when the chamber door is closed by means of the elastic deformation of the buffer convex wings, so that the integral structural stability of the scheme is ensured.

As shown in fig. 5, the cool air generating device 1 further includes a compressor, a condenser, a fan 11 and an evaporator 12, the cool air generating device includes an equipment cavity 13 and a working cavity 14, a heat insulating layer 15 (i.e. a top plate) is disposed between the equipment cavity 13 and the working cavity 14, the working cavity 14 is communicated with all the refrigeration cavities 3, and the working cavity 14 is communicated with the top end of the central tube 2;

the compressor and the condenser are fixedly connected in an equipment cavity 13, the evaporator 12 and the fan 11 are fixedly connected in a working cavity 14, the fan 11 is arranged at the top of the central tube 2, one side of the evaporator 12 is connected with the compressor, and the other side of the evaporator is connected with the condenser. Thus, refrigerant will circulate in the compressor- -condenser- -capillary tube- -evaporator- -compressor.

Among them, the compressor functions as suction, discharge and pressurization, specifically: the compressor absorbs the refrigerant vapor from the evaporator at low temperature and low pressure, and the refrigerant vapor finally becomes vapor at high temperature and high pressure after adiabatic compression by the compressor.

The condenser functions as liquefaction and heat dissipation, and specifically: the compressor introduces high-temperature high-pressure steam into the condenser, condenses refrigerant steam under the same pressure, and radiates heat to surrounding media to change the refrigerant steam into high-pressure low-temperature refrigerant cold liquid.

The capillary has the functions of throttling and reducing pressure, and particularly: the refrigerant cold liquid with high pressure and low temperature is subjected to intermediate enthalpy throttling in a capillary vessel, then is converted into refrigerant vapor with low temperature and low pressure, and then the refrigerant vapor is sent into an evaporator.

The evaporator functions as a vaporization and heat absorption, and specifically: the low-temperature and low-pressure refrigerant vapor passing through the capillary tube is boiled under the condition of the equal pressure of the evaporator, and the refrigerant vapor can absorb the heat of the surrounding medium in the boiling process and finally becomes the low-temperature and low-pressure dry saturated vapor of the refrigerant.

As shown in fig. 4, the working chamber where the evaporator is located is connected with the refrigerating chamber through a plurality of air holes, and the air in the refrigerating chamber is sucked by the fan and passes through the evaporator, and the heat is absorbed by the evaporator to become cold air, and then the cold air is blown by the fan to enter the central tube and then is sent to other chambers.

Since the density of the hot air is lower than that of the cold air, the air with higher temperature in the chamber is gathered to the upper part, sucked into the space containing the evaporator, cooled and then sent into each refrigeration chamber, so that the whole refrigeration process is circulated, and the temperature of each chamber can be rapidly and uniformly reduced.

As shown in fig. 9, at least one partition layer 30 horizontally disposed is disposed in the refrigerating chamber 3, and a plurality of communication holes are opened in the partition layer 30. Thereby separating two, three or more different refrigeration areas which are communicated with each other in the refrigeration chamber 3, and achieving the purpose of synchronously refrigerating more target areas.

While the invention has been described in terms of its preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. The refrigerating device comprises a cold air generating device (1), and is characterized in that the cold air generating device (1) comprises a central pipe (2) for guiding out cold air, the central pipe (2) is vertically arranged, and a plurality of cold air holes (20) are formed in the side wall of the central pipe (2);

the refrigerating device further comprises a plurality of vertically arranged refrigerating chambers (3), wherein the refrigerating chambers (3) are uniformly distributed around the central pipe (2) along the circumferential direction and are communicated with the central pipe (2) through cold air holes (20).

2. A cold storage device according to claim 1, wherein a plurality of partitions (4) are fixedly attached to the side walls of the central tube (2) to divide a plurality of cooling chambers (3) around the central tube (2).

3. A cold storage device according to claim 1, wherein the top of the refrigeration chamber (3) is sealed by a top plate (5) and the bottom by a bottom plate (6), and wherein a chamber door (7) is movably connected to the side of the refrigeration chamber (3) remote from the central tube (2).

4. A cold storage device according to claim 1, 2 or 3, wherein one side of the partition (4) far away from the central tube (2) is fixedly connected with heat-insulating columns (41), and a chamber door (7) which can be opened or closed is arranged between the adjacent heat-insulating columns (41);

the tops of the plurality of partition plates (4) are fixedly connected with top plates (5) so that the tops of the refrigeration chambers (3) are sealed; the bottoms of the plurality of partition plates (4) are fixedly connected with a bottom plate (6) for sealing the bottom end of the central tube (2), so that the bottom of the refrigeration chamber (3) is sealed;

when the chamber door (7) is closed, the sealing between the chamber door (7) and the heat preservation upright post (41) is kept, and meanwhile, the sealing between the chamber door (7) and the top plate (5) and before the chamber door (7) and the bottom plate (6) is also kept.

5. A cold storage device according to claim 4, wherein the heat-insulating upright (41) comprises a first outer metal plate (411), a first inner metal plate (412) and a first heat-insulating support frame (413);

the inner side metal plate I (412) is fixedly connected with one side, far away from the central pipe (2), of the partition plate (4), and the outer side metal plate I (411) is fixedly connected to the outer side of the inner side metal plate I (412) through a heat insulation support frame I (413), so that the heat insulation support frame I (413) conducts heat insulation between the outer side metal plate I (411) and the inner side metal plate I (412).

6. A cold storage device according to claim 4, wherein the top panel (5) comprises a second outer metal plate (51), a second inner metal plate (52) and a second heat insulating support frame (53);

the bottom of the inner side metal plate II (52) is fixedly connected with the tops of the plurality of partition plates (4), and the outer side metal plate II (51) is fixedly connected above the inner side metal plate II (52) through a heat insulation support frame II (53), so that the heat insulation support frame II (53) can insulate heat between the outer side metal plate II (51) and the inner side metal plate II (52).

7. A cold storage device according to claim 4, wherein the bottom panel (6) comprises an outer metal sheet three (61), an inner metal sheet three (62) and an insulating support frame three (63);

the top of the inner side metal plate III (62) is fixedly connected with the bottoms of the plurality of partition plates (4), and the outer side metal plate III (61) is fixedly connected below the inner side metal plate III (62) through a heat insulation support frame III (63), so that the heat insulation support frame III (63) insulates heat between the outer side metal plate III (61) and the inner side metal plate III (62).

8. A cold storage device as claimed in claim 4, wherein the end surface of the heat-insulating upright column (41) facing the chamber door (7), the end surface of the top plate (5) facing the chamber door (7) and the end surface of the bottom plate (6) facing the chamber door (7) are fixedly connected with strip-shaped sealing gaskets (8); the surface of the chamber door (7) facing the refrigeration chamber (3) is provided with a plurality of accommodating grooves for accommodating sealing gaskets (8);

the sealing gasket (8) comprises a long strip-shaped body, and one side of the body, which is back to the chamber door (7), is provided with at least one buffer cavity (81) arranged along the length direction of the body; one side of the body facing the cavity door (7) is provided with a hollow rib (82) which is connected with the body into a whole, and the hollow rib (82) is matched with the accommodating groove; the two sides of the body are provided with a plurality of buffering convex wings (83) which are connected with the body into a whole, and the buffering convex wings (83) incline towards one side where the cavity door (7) is located.

9. A cold storage device according to claim 1, 2 or 3, wherein at least one horizontally arranged partition (30) is arranged in the refrigerating chamber (3), and a plurality of communication holes are arranged on the partition (30).

10. A cold storage device according to claim 1, 2 or 3, wherein the cold air generating device (1) further comprises a compressor, a condenser, a fan (11) and an evaporator (12), the cold air generating device comprises an equipment chamber (13) and a working chamber (14), a heat insulating layer (15) is arranged between the equipment chamber (13) and the working chamber (14), the working chamber (14) is communicated with all the refrigeration chambers (3), and the working chamber (14) is communicated with the top end of the central tube (2);

the compressor and the condenser are fixedly connected in an equipment cavity (13), the evaporator (12) and the fan (11) are fixedly connected in a working cavity (14), the fan (11) is arranged at the top of the central pipe (2), one side of the evaporator (12) is connected with the compressor, and the other side of the evaporator is connected with the condenser.