WO2016119367A1

WO2016119367A1 - Air conditioning unit having tubesheet combined heat-exchanging evaporative condenser

Info

Publication number: WO2016119367A1
Application number: PCT/CN2015/081395
Authority: WO
Inventors: 李志明; 谭栋; 张勇
Original assignee: 广州市华德工业有限公司
Priority date: 2015-01-28
Filing date: 2015-06-12
Publication date: 2016-08-04
Also published as: CN105987531A

Abstract

An air conditioning unit having a tubesheet combined heat-exchanging evaporative condenser (2), comprising a compressor (1), an evaporative condenser (2), a throttling device (3), an evaporator (4) and a fan (5); the evaporative condenser (2) comprises a cooling fan (21), a water distributor (23), a water-collecting reservoir (24) and a tubesheet combined heat exchanger (25); the tubesheet combined heat exchanger (25) is formed by connecting a plurality of tubesheet combined heat-exchanging members via an inlet header and an outlet header; the tubesheet combined heat-exchanging members comprise a heat-transferring plate (27), and a coil pipe (26) formed by machining a heat-exchanging pipe; the heat-transferring plate (27) is provided with a receiving groove (28), and a shape of the receiving groove (28) matches a shape of the coil pipe (26); the coil pipe (26) is placed in the receiving groove (28), and a heat-conducting bonding layer (29) is filled in a gap between the coil pipe (26) and the receiving groove (28); the heat-conducting bonding layer (29) enables a full contact between the heat-transferring plate (27) and the coil pipe (26), thus increasing a heat-exchange area; and the heat-transferring plate (27) can guide cooling water to form a continuous flow surface, thus increasing an evaporation area of the cooling water, improving a heat-exchange efficiency and reducing a volume of the condenser.

Description

Air conditioning unit with plate tube composite heat exchange evaporative condenser

Technical field

The invention relates to the field of heat exchange equipment, in particular to an air conditioning unit with a plate type and a coil type composite heat exchange type evaporating condenser.

Background technique

At present, the air-conditioning unit on the market usually uses a curved coil to form a heat exchanger, and the outer surface of the heat exchanger is cooled by spray water, and the circulating spray water is used to evaporate and remove heat. However, the outer surface of the heat exchanger tube of the coil heat exchanger is generally a smooth surface, and the heat exchange efficiency is low. At the same time, the surface area of the cooling water evaporating heat transfer is small, and the spacing of the coils needs to be increased to increase the heat exchange time between the cooling water and the air, resulting in a bulky volume of the entire heat exchanger. On the other hand, since there is no medium to guide the flow of cooling water between the upper and lower tubes of the coil, when the cooling water descends from above, under the traction of the vertical wind direction, the cooling water is disorderly fluttering and easy to generate flying water, and the coil is clothed. The water is uneven, easy to store dry spots, reduce heat exchange capacity and there is a risk of scaling.

In the patent of the applicant's earlier application number CN202836298U, a heat exchange tube for a coupling coupling coil evaporative condenser is disclosed, and a filler sheet is installed between the coils to guide the spray water to form a water film, and the solution is solved. The problem of disorderly flying water of cooling water. The multi-piece packing piece is attached to the coil tube by means of a buckle or the like, and the installation and disassembly are cumbersome; in such a mounting manner, the packing piece and the coil tube are not closely installed, which can meet the requirement of guiding the spray water to form a water film. However, the need for direct heat exchange with the coil cannot be met, and the filler sheet is not a heat exchange material and cannot exchange heat with the coil. Therefore, although the invention patent improves the heat exchange efficiency to some extent, However, since the heat exchange efficiency is improved only by increasing the utilization rate of the cooling water, the heat exchange efficiency is not greatly improved.

Summary of the invention

In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to increase the heat exchange efficiency to a greater extent by changing the heat exchange structure of the coil.

In order to solve the above technical problem, the technical solution adopted by the present invention is an air conditioning unit with a plate and tube composite heat exchange type evaporative condenser, including a compressor, an evaporative condenser, a throttling device, an evaporator and a fan. The evaporative condenser comprises a cooling fan, a water distributor and a sump; the evaporative condenser further comprises a plate-tube composite heat exchanger; the plate-tube composite heat exchanger is fed by a plurality of plate-tube composite heat exchangers The tube and the tube assembly are connected; the tube tube composite heat exchange sheet comprises a heat transfer sheet and a coil processed by the heat exchange tube; the heat transfer sheet is provided with a seating groove, and the shape of the receiving groove Matching the shape of the coil; the coil is placed in the mounting groove, and the gap between the coil and the mounting groove is filled with a thermally conductive adhesive layer. The heat transfer plate can guide the spray cooling water from the upper heat exchange tube to the lower heat exchange tube to improve the utilization of the cooling water; and at the same time, the heat conductive adhesive layer fills the gap between the full coil and the heat transfer plate to make the disk The tube is in full contact with the heat transfer plate, and the heat transfer plate becomes a rib of the coil, increasing the effective heat exchange area of the coil.

Preferably, the thermally conductive adhesive layer is a metal filler. Such a structure can be realized by soaking liquid metal and then cooling, so that the heat conductive adhesive layer can be sufficiently filled into the gap, and the heat conductivity of the metal is good, thereby further improving the rib formation of the heat transfer sheet.

More preferably, the gap between the coil and the seating groove is less than 10 mm. Such a knot The structure gap is small. When the liquid metal is immersed, due to the viscosity of the liquid metal, the liquid metal will have a capillary action, and after penetrating into the inner surface of the heat transfer plate and the coil contact surface, a uniform layer can be formed in the contact surface. The thin filler not only completely fuses the heat transfer plate and the coil into a whole body, but also has a thin filling layer to reduce the contact thermal resistance between the heat transfer plate and the coil.

More preferably, the heat transfer sheet is also stamped with a plurality of limiting slots and/or positioning pads. Such a structure ensures that the gap between the coil and the heat transfer plate can be sufficiently small when the liquid metal is immersed.

Preferably, the metal filler is one or more of zinc, tin, aluminum, and copper. These metals have low melting point and low price, and are used for liquid metal immersion, which is extremely cost-effective.

In a preferred embodiment, the thermally conductive adhesive layer is a thermally conductive adhesive. Direct use of thermal adhesives makes processing easier.

Preferably, the exhaust port of the compressor is connected to the gas pipe of the evaporative condenser, and the liquid pipe of the evaporative condenser is connected to the liquid pipe of the evaporator through the throttling device, and the gas pipe of the evaporator and the suction of the compressor Port connection; the evaporative condenser is one or more in parallel.

Preferably, the exhaust port of the compressor is connected to the gas pipe of the evaporative condenser, and the liquid pipe of the evaporative condenser is connected to the liquid pipe of the evaporator through the throttling device, and the gas pipe of the evaporator and the suction of the compressor The air port is connected, so the air conditioning unit has a refrigeration cycle mode and a heat pump cycle mode; the air conditioning unit is provided with a first refrigeration valve, a second refrigeration valve, a first heat pump valve and a second heat pump valve; the first refrigeration valve is disposed at a connecting line between the exhaust port of the compressor and the gas pipe of the evaporative condenser, and the second refrigerating valve is disposed at the suction port of the compressor On the connecting pipe of the gas pipe of the evaporator, the first heat pump valve is disposed on the connecting pipe of the exhaust port of the compressor and the gas pipe of the evaporator, and the second heat pump valve is disposed at the suction port of the compressor and the evaporating type The connecting line of the gas pipe of the condenser.

Preferably, the exhaust port of the compressor is provided with a first reversing valve, and the suction port of the compressor is provided with a second reversing valve; the two outlets of the first reversing valve are respectively connected with the gas of the evaporating condenser The tube and the gas pipe of the evaporator are connected, and the two inlets of the second reversing valve are respectively connected with the gas pipe of the evaporative condenser and the gas pipe of the evaporator; the first reversing valve and the second reversing valve are two Three-way reversing valve.

Preferably, the air conditioning unit is provided with a four-way reversing valve, and the four interfaces of the four-way reversing valve are respectively connected with the compressor exhaust port, the gas pipe of the evaporative condenser, the gas pipe of the evaporator, and the suction of the compressor. Air port connection.

Compared with the prior art, the air conditioning unit with the plate tube composite heat exchange type evaporative condenser has the following beneficial effects:

1) The thermal conductive adhesive layer makes the heat transfer plate and the coil fully contact, so that the coil can generate a ribbing effect through the heat exchange plate and increase the effective heat exchange area;

2) The heat exchange plate can simultaneously drain the cooling water to form a continuous water flow surface, and increase the evaporation surface area of the cooling water;

3) Increasing the effective heat exchange area and the evaporation water evaporation area not only improves the heat exchange efficiency, but also helps to reduce the condenser volume.

The above description is only an overview of the technical solutions of the present invention, and the above-described and other objects, features and advantages of the present invention can be more clearly understood. , the following special implementation is better For example, in conjunction with the drawings, the details are as follows.

DRAWINGS

1 is a schematic view showing the principle of a refrigeration cycle mode of an air conditioning unit with a plate and tube composite heat exchange type evaporative condenser according to the present invention;

2 is a schematic view showing the principle of an air conditioning unit with a plate and tube composite heat exchange type evaporative condenser according to the present invention;

3 is a schematic view showing the principle of a heat pump cycle mode of an air conditioning unit with a plate and tube composite heat exchange type evaporative condenser according to the present invention;

4 is a schematic view showing the principle of using a plurality of evaporators in parallel for an air conditioning unit with a plate and tube composite heat exchange type evaporative condenser according to the present invention;

5 is a schematic view showing the principle of using a two-position three-way reversing valve for an air conditioning unit with a plate and tube composite heat exchange type evaporative condenser according to the present invention;

6 is a schematic view showing the principle of using a four-way reversing valve for an air conditioning unit with a plate and tube composite heat exchange type evaporative condenser according to the present invention;

Figure 7 is a schematic structural view of a plate-tube composite heat exchange type evaporating condenser of the present invention;

8 is a schematic structural view of a plate-tube composite heat exchange sheet of a plate-tube composite heat exchange type evaporating condenser according to the present invention;

9 is a schematic structural view of a heat transfer plate of a plate-tube composite heat exchange sheet of a plate-tube composite heat exchange type evaporating condenser according to the present invention;

Figure 10 is a cross-sectional view taken along line A-A of Figure 8.

detailed description

The specific embodiments, structures, features and functions of the present invention are described in detail below with reference to the accompanying drawings and preferred embodiments, in which:

Example 1

1 is a schematic view showing the principle of a refrigeration cycle mode of an air conditioning unit of the present invention. As can be seen from FIG. 1, the air conditioning unit includes a compressor 1, an evaporative condenser 2, a throttling device 3, an evaporator 4, and a fan 5; The exhaust port 8 of the compressor is connected to the gas pipe 2a of the evaporative condenser, and the liquid pipe 2b of the evaporative condenser is connected to the liquid pipe 4a of the evaporator through a throttling device, and the gas pipe 4b of the evaporator and the suction of the compressor The port 9 is connected. The evaporative condenser 2 employs a plate-tube composite heat exchange sheet, which will not be described in detail herein.

Working principle: when the refrigerant is compressed by the compressor 1 into a high temperature and high pressure state, the refrigerant enters the evaporative condenser 2 through the pipeline of the refrigeration system. After passing through the evaporative condenser 2, the gas in the high temperature and high pressure state is cooled into a low temperature and high pressure liquid, and The low-temperature low-pressure liquid is formed in the evaporator 4 through the throttling device 3 to exchange heat with the air to obtain cold air, and then the refrigerant liquid is evaporated and vaporized in the evaporator 4 and sucked away by the compressor 1 to complete the refrigeration cycle mode.

Example 2

2 is a schematic view showing the principle of the air conditioning unit of the present invention, which is different from the first embodiment in that the air conditioning unit is provided with a first refrigerating valve 10, a second refrigerating valve 11, and a first heat pump valve 12. And a second heat pump valve 13; the first refrigerating valve 10 is disposed on a connecting line of the exhaust port 8 of the compressor and the gas pipe 2a of the evaporative condenser, and the second refrigerating valve 11 is disposed at the suction port 9 of the compressor On the connecting line with the gas pipe 4b of the evaporator, The first heat pump valve 12 is disposed on the connecting line of the exhaust port 8 of the compressor and the gas pipe 4b of the evaporator, and the second heat pump valve 13 is disposed at the suction port 9 of the compressor and the gas pipe of the evaporating condenser. 2a on the connecting line. Therefore, the air conditioning unit has a refrigeration cycle mode and a heat pump cycle mode. Also, the evaporative condenser 2 employs a plate-tube composite heat exchange sheet.

Working principle: When the heat pump is in the circulation mode, as shown in FIG. 3, the first heat pump valve 12 and the second heat pump valve 13 are opened at this time, the first refrigeration valve 10 and the second refrigeration valve 11 are closed, and the refrigerant passes through the compressor. 1 After the gas is compressed into a high-temperature and high-pressure state, the refrigerant enters the evaporator 4 through the pipeline of the refrigeration system, exchanges heat with the air to obtain hot air, and then the gas in the high-temperature and high-pressure state is cooled into a low-temperature high-pressure liquid, and is cooled by the throttling device 3 The low pressure liquid enters the evaporative condenser 2, and then the refrigerant liquid evaporates and vaporizes in the evaporative condenser 2 and is sucked away by the compressor 1, completing the heat pump circulation mode. Also, the evaporative condenser 2 employs a plate-tube composite heat exchange sheet.

Example 3

Fig. 4 is a schematic view showing the principle of the air conditioning unit of the present invention in which a plurality of evaporators are connected in parallel, which is different from the first embodiment in that the evaporator 4 is connected in parallel by a plurality of evaporators. Also, the evaporative condenser 2 employs a plate-tube composite heat exchange sheet.

Example 4

FIG. 5 is a schematic view showing the principle of using a two-position three-way reversing valve for the air conditioning unit of the present invention, which is different from the first embodiment in that the exhaust port 8 of the compressor 1 is provided with the first two positions. Three-way reversing valve 14, the suction port 9 of the compressor is provided with a second two-position three-way reversing valve 15; the two outlets of the first two-position three-way reversing valve 14 are respectively connected with the gas pipe of the evaporative condenser 2a is connected to the gas pipe 4b of the evaporator, and two of the second two-position three-way switching valve 15 The inlets are respectively connected to the gas pipe 2a of the evaporative condenser and the gas pipe 4b of the evaporator.

Example 5

6 is a schematic view showing the principle of using a four-way reversing valve for the air conditioning unit of the present invention, which is different from the first embodiment in that the four ports of the four-way reversing valve 16 are respectively arranged with the row of the compressor. The gas port 8, the gas pipe 2a of the evaporative condenser, the gas pipe 4b of the evaporator, and the suction port 9 of the compressor are connected.

The evaporative condenser 2 used in the above embodiment will be described in detail below.

As shown in FIG. 7, the evaporative condenser 2 includes a cooling fan 21, a water pump 22, a water distributor 23, a sump 24, and a plate-tube composite heat exchanger 25; the plate-tube composite heat exchanger 25 is located in the water distributor. Between the 23 and the sump 24, the water distributor 23 and the sump 24 are connected by a water pump 22; the fan 21 is located at one end of the plate-tube composite heat exchanger 25. The plate tube composite heat exchanger 25 is composed of a plurality of plate tube composite heat exchange sheets connected through an inlet header and an outlet header. As shown in FIG. 8 and FIG. 9, the plate-tube composite heat exchange sheet includes a coil 26 processed by a heat exchange tube (the processing may be a bending of a long heat exchange tube into a coil, or may be The heat exchange tubes of the curved section are welded together with the heat exchange tubes of the straight section to form a coil), and further comprise a heat transfer sheet 27. In this embodiment, the coil 26 is formed by continuous S-shaped bending of the heat exchange tubes, wherein the straight sections of the heat exchange tubes are substantially parallel or non-parallel, and the coil 26 can also adopt other suitable for use in the evaporation condenser. shape. The heat exchange tube of the coil 26 may be a copper tube, a stainless steel tube or a galvanized steel tube, etc., and the cross-sectional shape of the internal flow passage may be a circular shape, an elliptical shape, a spiral shape, a corrugated shape or an olive shape. As can be understood by those skilled in the art, the inner and outer surfaces of the coil 26 can adopt a smooth surface, preferably an enhanced heat transfer surface provided with internal and external threads. At the same time, the outer surface of the coil 26 may also be provided with a hydrophilic or anti-corrosive coating. The coil 26 is provided with an inlet and an outlet of the flow passage for connecting with the inlet header and the outlet header. In this embodiment, the heat exchange tube is bent with a plurality of straight pipe sections; the straight pipe sections adjacent to the heat exchange pipe are parallel to each other, and the pipe spacing of the straight pipe sections adjacent to the heat exchange pipe is the same, or the pipe spacing is located The lower layer that receives the spray cooling water first receives the lower layer of the spray cooling water gradually becomes smaller; or the length of the straight pipe section of the heat exchange tube may be sprayed and cooled from the upper layer that is first received by the cooling water spray to the rear. The lower layer of water is gradually increasing. The material of the heat transfer plate 27 may be a carbon steel plate, a stainless steel plate, an aluminum sheet, a copper sheet or the like. The plate-tube composite heat exchange fins are disposed longitudinally, that is, the cooling wind blown by the cooling fan 21 flows along a substantially longitudinal direction of the coil pipe 26.

As shown in FIG. 9 and FIG. 10, the heat transfer plate 27 is provided with a receiving groove 28. In the embodiment, the receiving groove 28 is realized by punching the heat transfer plate 27, or may be produced. The heat transfer sheet 27 is directly formed; the shape of the seating groove 28 matches the shape of the coil 26. The coil 26 is placed in the seating groove 28, and a gap between the coil 26 and the seating groove 28 is filled with a thermally conductive adhesive layer 29. In this embodiment, the thermally conductive adhesive layer 29 is a metal filler zinc. The specific method may be that the heat transfer sheet 27 and the coil 26 are immersed in the high temperature liquid zinc, so that the liquid zinc flows into the gap between the coil 26 and the seating groove 28, and the gap is filled, and the liquid metal is adhered. When the liquid metal is cooled and solidified into a solid state, it becomes a thermally conductive adhesive layer 29, and is filled between the coil 26 and the seating groove 28, and the both are fixed. In addition to zinc, tin, aluminum, copper and other metals or combinations thereof can be used, all of which have the characteristics of low melting point and low price, and are cost-effective.

Further, in this embodiment, the gap between the coil 26 and the seating groove 28 is less than 10 mm. When the liquid metal is immersed, the liquid gold is viscous due to the viscosity of the liquid metal. The capillary action occurs, and after the penetration into the contact surface of the heat transfer sheet 27 and the coil 26, the thermally conductive adhesive layer 29 formed in the contact gap can be made uniform and thin, not only the heat transfer sheet 27 The coil 26 is completely fused integrally, and since the thickness of the thermally conductive adhesive layer 29 is thin, the contact thermal resistance between the heat transfer sheet 27 and the coil 26 is effectively reduced. The smaller the gap between the coil 26 and the seating groove 28, the more obvious the capillary action of the liquid metal permeation, the more uniform the thermal conductive adhesive layer 29 is formed, and the relative cost and processing difficulty are relatively large; the gap width of 10 mm is The cost is the best choice, and the gap width of 5 mm is the best cost-effective choice, and the optimal choice for uniformity within 3 mm. Further, in order to ensure that the high temperature liquid metal is immersed, the distance between the coil 26 and the heat transfer plate 27 can be sufficiently small, and a plurality of limit grooves and/or positioning pads can be punched out on the heat transfer plate 27 (Fig. Not shown), before the immersion, the coil 26 is pre-fixed by the limit slot mounting or the positioning of the solder joint. It is also possible to pre-fix the two by means of a clamp, but the operation is complicated.

The heat of the coil 26 is conducted to the heat transfer sheet 27 through the thermally conductive adhesive layer 29, and the heat transfer sheet 27 becomes the rib of the coil 26, which greatly increases the heat exchange area and directly enhances the heat exchange effect of the coil 26; The hot plate 27 has the effect of guiding the cooling water, so that the cooling water forms a continuous water flow on the surface of the heat transfer plate 27, avoids the disordered flying water of the cooling water, and improves the utilization rate of the cooling water. In addition, since the heat transfer sheet 27 is integrated, the cooling water at the coupling with the coil 26 can be prevented from flowing alternately, and the water distribution rate can be ensured.

On the other hand, the thermally conductive adhesive layer 29 can be replaced by a thermal conductive adhesive; only the thermal conductive adhesive is evenly applied to the mounting groove 28 of the heat transfer plate 27, and the coil 26 is directly placed into the mounting groove 28. Can be bonded (for some thermal adhesives that need to be combined, It is also necessary to apply a matching thermal conductive adhesive on the coil 26 for easy installation and simple process. However, the existing thermal conductive adhesives, such as silicone thermal conductive adhesives, epoxy resin AB adhesives, and polyurethane thermal conductive adhesives, are not as strong as zinc, aluminum, etc., and are prone to unevenness during the laminating process, resulting in unevenness. When the coil 26 is adhered to the seating groove 28, an air layer insulation phenomenon may occur, which affects heat exchange efficiency.

In addition, the heat transfer plate 27 may be provided with openings, corrugations, bends, water guides, dovetail grooves, reinforcing ribs and the like to achieve an effect of increasing the water distribution effect, preventing the flying water, and enhancing the solidity. Further, a plurality of elongated holes, round holes or other shaped through holes (not shown) may be formed at the receiving groove 28, and when the coil 26 is disposed in the receiving groove 28, a part of the coil 26 may be exposed. Outside the tank 28, it can be directly in contact with the cooling water. This method can increase the direct contact area between the coil and the water. At the same time, the opening of the hole can disturb the heat transfer of the copper tube due to the unevenness of the water flow, but it is certain To a lesser extent, the ribbing of the heat transfer sheets is weakened.

The above embodiments are merely preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention belong to the present invention. The scope of the claim.

Claims

An air conditioning unit with a tube-tube composite heat exchange evaporative condenser, comprising a compressor, an evaporative condenser, a throttling device, an evaporator and a fan, the evaporative condenser comprising a cooling fan, a water distributor and a set a water tank; characterized in that: the evaporative condenser further comprises a plate tube composite heat exchanger; the plate tube composite heat exchanger is composed of a plurality of plate tube composite heat exchange sheets connected through an inlet header and an outlet header; The plate tube composite heat exchange sheet comprises a heat transfer plate and a coil processed by the heat exchange tube; the heat transfer plate is provided with a seating groove, the shape of the receiving groove is matched with the shape of the coil; the coil is placed In the mounting groove, the gap between the coil and the mounting groove is filled with a thermally conductive adhesive layer.
The air conditioning unit with a tube-tube composite heat exchange type evaporative condenser according to claim 1, wherein the heat conductive adhesive layer is a metal filler.
The air conditioning unit with a tube-tube composite heat exchange type evaporative condenser according to claim 2, wherein a gap between the coil and the seating groove is less than 10 mm.
The air conditioning unit with a plate tube composite heat exchange type evaporative condenser according to claim 3, wherein the heat transfer plate is further stamped with a plurality of limiting slots and/or positioning pads.
The air conditioning unit with a tube-tube composite heat exchange type evaporative condenser according to claim 2, wherein the metal filler is one or more of zinc, tin, aluminum, and copper.
The air conditioning unit with a tube-tube composite heat exchange type evaporative condenser according to claim 1, wherein the heat conductive adhesive layer is a heat conductive adhesive.
The air conditioning unit with a plate tube composite heat exchange type evaporative condenser according to claim 1, wherein: the exhaust port of the compressor and the gas pipe of the evaporative condenser Connected, the liquid pipe of the evaporative condenser is connected to the liquid pipe of the evaporator through a throttling device, and the gas pipe of the evaporator is connected to the suction port of the compressor; the evaporative condenser is connected in parallel.
The air conditioning unit with a plate tube composite heat exchange type evaporative condenser according to claim 1, wherein the exhaust port of the compressor is connected to a gas pipe of the evaporative condenser, and the liquid of the evaporative condenser The tube is connected to the liquid pipe of the evaporator through a throttling device, and the gas pipe of the evaporator is connected to the suction port of the compressor; the air conditioning unit is provided with a first refrigeration valve, a second refrigeration valve, a first heat pump valve and a a second heat pump valve; the first refrigeration valve is disposed on a connecting line between the exhaust port of the compressor and the gas pipe of the evaporative condenser, and the second refrigeration valve is disposed at a connection between the suction port of the compressor and the gas pipe of the evaporator In the pipeline, the first heat pump valve is disposed on the connecting pipe of the exhaust port of the compressor and the gas pipe of the evaporator, and the second heat pump valve is disposed at the connection of the suction port of the compressor and the gas pipe of the evaporating condenser. On the pipeline.
The air conditioning unit with a plate-tube composite heat exchange type evaporative condenser according to claim 1, wherein the exhaust port of the compressor is provided with a first reversing valve, and the suction port of the compressor is provided. a second reversing valve; the two outlets of the first reversing valve are respectively connected with the gas pipe of the evaporative condenser and the gas pipe of the evaporator, and the two inlets of the second reversing valve are respectively connected with the gas pipe of the evaporating condenser Connected to the gas pipe of the evaporator; the first reversing valve and the second reversing valve are two-position three-way reversing valves.
The air conditioning unit with a plate tube composite heat exchange type evaporative condenser according to claim 1, wherein the air conditioning unit is provided with a four-way reversing valve, and the four interfaces of the four-way reversing valve are respectively compressed. The exhaust port of the machine, the gas pipe of the evaporative condenser, the gas pipe of the evaporator, and the suction port of the compressor are connected.