CN107532807A - Compressor unit, heat source unit and air regulator - Google Patents

Abstract

The present invention proposes a compressor unit for an air conditioner, comprising: a compressor (37) disposed in a first housing (44); and a first heat source heat exchanger unit port ( 42) and a second heat source heat exchanger unit port (43) configured to connect the compressor unit to the heat source heat exchanger (5) of the heat source heat exchanger unit (31) of the air conditioner, The heat source heat exchanger is provided in a second housing (2) separated from the first housing and configured to exchange heat with a heat source; a first indoor unit port (46) and a second indoor unit port (47 ), which is configured to connect the compressor unit to an indoor heat exchanger (53) of at least one indoor unit (50) of the air conditioner; a first refrigerant pipe (49), which connects the second a heat source heat exchanger unit port (43) fluidly connected to said first indoor unit port (46); and a secondary cooling heat exchanger (40) disposed within said first housing and connected to said first refrigeration A refrigerant pipe is fluidly connected for heat transfer with refrigerant flowing through said first refrigerant pipe.

Description

Compressor unit, heat source unit and air conditioner

technical field

The present invention relates to an air conditioner, and in particular, the present invention relates to an air conditioner using external air or circulating water as a heat source. Such an air conditioner may also be called a heat pump. Additionally, air conditioners can be used to cool and/or heat the space to be conditioned. More particularly, the present invention relates to a compressor unit for the air conditioner and a heat source unit for the air conditioner.

Background technique

Generally, an air conditioner consists of one or more outdoor units and one or more indoor units connected by refrigerant piping. The outdoor unit and the indoor unit each comprise a heat exchanger, which exchanges heat with the heat source on the one hand and with the space to be conditioned on the other hand. The outdoor unit of the air conditioner is mostly installed outside the building, for example, on the roof or on the facade. However, in some cases this is considered unfavorable from an aesthetic point of view. Therefore, EP 2 108 897 A1 proposes to integrate the outdoor unit into the ceiling of the building so as to be hidden therein and not be noticed from outside the building.

However, the outdoor units proposed in this document have certain disadvantages. One negative aspect is that outdoor units may produce disturbing noises that can be perceived by people inside the building. A second negative aspect concerns installation and maintenance, since the outdoor unit is relatively heavy and requires a relatively large installation space in relation to its height due to its construction.

reference list

patent documents

PTL 1: EP 2 108 897 A1

Contents of the invention

technical problem

In order to overcome these deficiencies, the applicant of the present application has considered dividing the heat source unit into a compressor unit and a heat source heat exchanger unit. In addition, some appliances need to integrate the secondary cooling part into the refrigerant circuit to improve efficiency. However, integrating the secondary cooling part into a separate heat source unit requires installing more pipes between the heat source heat exchanger unit and the compressor unit and the indoor unit, resulting in more complicated and high installation costs. Additionally, more tubing is required for the gaseous refrigerant to flow therethrough. Such pipes are more expensive due to the larger diameter required and thus more material. In addition, more time must be used for installation. Finally, there may be a loss in efficiency if the gaseous refrigerant tubing between the compressor unit and the heat source heat exchanger unit becomes too long. In the case of disposing the sub-cooling heat exchanger close to the heat source heat exchanger (ie, in the heat source heat exchanger unit), the above disadvantages have been recognized.

problem solution

Therefore, an object that the present invention intends to solve is to provide a compressor unit preferably as a part of the above-mentioned heat source unit and a heat source unit having this compressor unit, even if a sub-cooling part is integrated, such compressor unit and heat source unit It is also possible to reduce pipework, especially the gaseous refrigerant pipework for connecting several of these units to a minimum, thereby ensuring ease of installation and lower installation costs.

This object is solved by a compressor unit according to claim 1 or a heat source unit according to claim 5 . Embodiments of the invention are defined in the dependent claims, the following description and the drawings.

According to one aspect, a compressor unit for an air conditioner is proposed. Air conditioners are configured to condition, heat or cool a space, such as a room within a building. The compressor unit includes a compressor disposed in the first housing. Thus, the first housing houses, preferably encapsulates, the compressor. In addition, sound insulators may be provided inside or outside the housing to prevent the noise generated by the compressor from being transmitted to the environment in which the compressor unit is installed. In addition, a first heat source port and a second heat source port are provided, and preferably, the first heat source port and the second heat source port can be accessed from outside the housing for easy connection. The first heat source port and the second heat source port are configured to connect the compressor to a heat source heat exchanger of a heat source unit of the air conditioner using refrigerant piping. The first heat source port and the second heat source port may be any kind of ports capable of connecting a refrigerant pipe to a compressor, such as a pipe that is open at one end and has an external thread at that end. However, so-called self-sealing connectors or quick fasteners can also be used. In most cases, however, this will be due to the specifications required to use lace or raised connectors. A heat source heat exchanger is provided in a second housing separate from the first housing and configured to exchange heat with the heat source. In this context, "separate" means that the housings represent separate components or units and shall not include the meaning that one housing is disposed within another housing. In certain embodiments, the heat source heat exchanger unit uses outside air (ie, the air outside the building) as a heat source. For this purpose, the second housing preferably has a first connection piece on one side of the heat exchanger and a second connection piece on the opposite side of the heat exchanger. The first connection and the second connection are preferably connected to ducts in fluid communication with the outside of the building, so that outside air can pass through the first heat exchanger. In addition, the compressor unit includes a first indoor unit port and a second indoor unit port configured to connect the compressor to at least one indoor unit of the air conditioner by means of refrigerant piping indoor heat exchanger. The first indoor unit port and the second indoor unit port may be of the same kind or a different kind from the first heat source port and the second heat source port. Additionally, the compressor unit comprises a first refrigerant pipe, preferably arranged within the first housing. The first refrigerant tube fluidly connects the first heat source port and the first indoor unit port. Thus, the first heat source port and the first indoor unit port are used to fluidly connect the heat source heat exchanger unit to one or more indoor units using refrigerant tubing. Even if it is possible to guide the connection between the heat source heat exchanger unit and the indoor unit, on the one hand it is proposed to connect these units via the compressor unit so that the part of the refrigerant pipe connecting these units passes through the first housing of the compressor unit. In addition, a secondary cooling heat exchanger is disposed within the first housing and is fluidly connected to the first refrigerant pipe so that the secondary cooling refrigerant flows through the first refrigerant pipe. Since the first refrigerant pipe passes through the first case, the secondary cooling heat exchanger can be integrated into the air conditioner without connecting the compressor unit and the heat source heat exchanger unit (in particular, the heat source heat exchanger and the compressor additional gaseous refrigerant piping required through the suction side of the secondary cooling heat exchanger). This additional long gaseous refrigerant tubing is integrated into the compressor unit and is therefore much shorter, requiring less material and requiring less installation time. Therefore, convenient installation is achieved and installation cost is reduced.

According to this embodiment, the compressor unit further comprises a second refrigerant pipe. The second refrigerant tube fluidly communicates or connects the second heat source port and the second indoor unit port. A compressor and preferably a four-way valve are interposed between the second heat source port and the second indoor unit port, or more specifically, the compressor and preferably a four-way valve are interposed between the second refrigerant connecting these ports. in the fittings. A collector may be included on the suction side of the compressor. In addition, the bypass passage is connected to the second refrigerant pipe on the suction side of the compressor between the compressor and the four-way valve, and the sub-cooling heat exchanger is fluidly connected to the bypass passage so that the Heat transfer occurs between the refrigerant and the refrigerant flowing through the first refrigerant pipe. Thus, all plumbing associated with the secondary cooling unit is housed in the first housing such that in one embodiment only the four ports. In particular, by placing the sub-cooling heat exchanger in the compressor unit and forming a loop of refrigerant pipes connecting the heat source heat exchanger module to the indoor unit via the compressor unit, it is possible to avoid a gap between the heat source heat exchanger unit and the indoor unit. Additional routes between. An additional advantage of locating the secondary cooling heat exchanger in the compressor module is that the large diameter tubes normally required for gaseous refrigerant to flow therethrough can be avoided.

According to one aspect, the compressor unit does not include the main expansion valve of the air conditioner. The "main expansion valve" of an air conditioner is defined as the expansion valve through which all of the refrigerant in the refrigerant circuit passes during cooling.

During heating, the main expansion valve limits the superheat after the heat source heat exchanger. During cooling, the main expansion valve is kept fully open to avoid high pressure drop. During cooling, all refrigerant passes through the main expansion valve. During heating, the entire refrigerant is divided and flows between the sub-cooling heat exchanger and the heat source heat exchanger.

In heating operation, there is a relatively large pressure drop due to the relatively long refrigerant piping connecting the sub-cooling heat exchanger to the heat source heat exchanger. Since the main expansion valve is not provided in the compressor unit, a refrigerant pressure drop between the compressor unit and the heat source heat exchanger unit can be compensated and two-phase flow noise can be reduced.

According to one embodiment, the compressor unit may comprise an oil separator on the discharge side of the compressor between the compressor and the four-way valve.

According to another aspect, a heat source unit for an air conditioner is proposed, the heat source unit includes the above-mentioned compressor unit and a heat source heat exchanger unit. As described above, the heat source heat exchanger unit has the heat source heat exchanger provided in the second case separated from the first case. The heat source heat exchanger is configured to exchange heat with a heat source, particularly outside air, and is fluidly connected or communicated with the compressor unit via the first heat source port and the second heat source port. In this context, since the first refrigerant pipe connects the first heat source port and the first indoor unit port, the connection of the heat source heat exchanger unit and the indoor unit forms a loop via the compressor unit (first housing). Thereby, the secondary cooling unit can be integrated into the compressor unit without the need for additional piping required to connect the compressor unit with the heat source heat exchanger unit.

As mentioned before, the main expansion valve of the air conditioner is arranged in the second housing, that is, in the heat source heat exchanger unit. Thus, the pressure drop between the compressor unit and the heat source heat exchanger unit is kept as low as possible and two-phase flow noise can be avoided.

As previously described, one or more indoor units may be fluidly connected or communicated with the compressor unit via the first indoor unit port and the second indoor unit port. In this context, the first indoor unit port is used to connect the indoor unit (in particular, the indoor heat exchanger) to the heat source heat exchanger unit (in particular, the heat source heat exchanger). The second indoor unit port is used to connect the indoor unit (in particular, the indoor heat exchanger) to the second refrigerant pipe and thus to the compressor. If more than one indoor unit is provided, the indoor units can be connected in parallel.

Other features and effects of the heat source unit can be obtained from the following description of the embodiments. In describing these embodiments, reference is made to the accompanying drawings.

Description of drawings

[Fig. 1] Fig. 1 shows a schematic circuit diagram of an air conditioner,

[ Fig. 2] Fig. 2 is a schematic sketch of the air conditioner shown in Fig. 1 installed in a building,

[ Fig. 3] Fig. 3 shows a perspective view of a heat source heat exchanger unit,

[ Fig. 4] Fig. 4 is a perspective view of a compressor unit,

[FIG. 5] FIG. 5 shows a longitudinal section of the heat source heat exchanger unit of FIG. 3, and

[ Fig. 6] Fig. 6 shows a schematic circuit diagram of an air conditioner according to a modification of the configuration shown in Fig. 1 .

detailed description

Figure 1 shows the circuit diagram of the air conditioner. The air conditioner has a heat source unit 30 including a heat source heat exchanger unit 31 and a compressor unit 32 .

The heat source heat exchanger unit 31 comprises a heat exchanger 5 consisting of an upper heat exchanger element 6 and a lower heat exchanger element 7 disposed relative to each other so as to form a "V" shape in side or cross-sectional view (see Figure 5). The heat source heat exchanger unit 31 also includes a main expansion valve 33 of the refrigerant circuit. As becomes clear in FIG. 1 , the entire amount of refrigerant contained in the circuit also passes through the main expansion valve 33 during cooling. In other words, the entire refrigerant delivered or supplied from the compressor 37 flows through the main expansion valve 33 during cooling.

The heat source heat exchanger unit is also shown in more detail in FIGS. 3 and 5 .

3 and 5 show a heat source heat exchanger unit 31 which may be part of the heat source unit 30 .

The heat source heat exchanger unit 31 includes a housing 2 (second housing) configured to be connected to an external air duct of the air conditioner. In particular, the heat source heat exchanger unit is configured as an "outdoor" unit of the air conditioner, however, the outdoor unit is in particular arranged in the ceiling of the building. Therefore, a first connection piece 3 is provided on the casing 2, the first connection piece 3 is connected with the air duct, thereby communicating the heat source heat exchanger unit 31 with the outside of the building and enabling the outside air to be brought into the casing 2 . At the opposite end of the housing 2, a connecting piece 4 (see FIG. 5 ) is provided, and the connecting piece 4 is provided for connecting the heat source heat exchanger unit 31 to the air duct leading to the outside of the building again, and can transfer the passing heat to the outside of the building. Air from the exchanger 5 is exhausted to the outside.

The housing 2 is generally rectangular and flat, which means that the height H is smaller than the width W and length L . In one embodiment, the height H is not greater than 50 cm, preferably not greater than 45 cm, more preferably not greater than 40 cm and most preferably not greater than 35 cm.

The heat source heat exchanger unit 31 also includes a heat exchanger 5 (heat source heat exchanger) also visible in FIG. 3 . However, the configuration of the heat exchanger 5 can best be seen in FIG. 5 . FIG. 5 also shows a side view of a heat exchanger 5 in the sense of the present application.

The heat exchanger 5 comprises an upper heat exchanger element 6 and a lower heat exchanger element 7 . Both the upper heat exchanger element 6 and the lower heat exchanger element 7 are flat or planar shaped and are positioned at an angle a therebetween. As can be seen from FIG. 1 , the upper heat exchanger element 6 and the lower heat exchanger element 7 are fluidly connected in parallel with the refrigerant tubes. Therefore, the heat exchanger 5 has a V-shape, wherein the "V" is oriented horizontally. The line CL passing through the apex 8 of the "V" is oriented horizontally, that is, elongated along the length L of the heat source heat exchanger unit 31 . The line CL is also the center line of the heat exchanger 5 , or in other words, the line of symmetry about the heat exchanger elements 6 , 7 .

The heat exchanger 5 is arranged in the air duct formed by the housing 2 such that all air sucked in through the opening at the connection 3 flows through the heat exchanger 5 at the top or bottom or sides of the heat exchanger 5 in the width direction , without any air bypassing the heat exchanger 5.

The upper heat exchanger element 6 and the lower heat exchanger element 7 are connected to each other at an apex 8 by a connecting element 9 . The connecting element is impermeable to air and also serves to mechanically or physically connect the upper heat exchanger element 6 and the lower heat exchanger element 7 . Each of the upper heat exchanger element 6 and the lower heat exchanger element 7 includes a heat exchanger coil 10 (loop of tubes) and cooling fins 11 disposed therebetween. The heat exchanger of this embodiment is suitable for outdoor applications, ie, as part of a heat source unit of an air conditioner. In this case, the fins of the upper heat exchanger element 6 and the lower heat exchanger element 7 are preferably quiche-type fins. Even though louvered fins are preferred for good quality air flow through the heat exchanger because they are provided with several holes that allow air to flow through the fins, condensation can collect in these holes and when the ambient temperature is below about 7 Celsius, this can cause problems with frost formation during heated operations. In order to prevent these problems, it is preferable to use quiche-type fins in these cases.

Two backward bent centrifugal fans 20 are arranged in the housing. These backward bent centrifugal fans 20 each have a suction opening 21 . In a side view ( FIG. 5 ), the central axis of the suction opening 21 and thus the fan 20 is substantially coincident or aligned with the central line CL of the heat exchanger 5 . However, in some appliances it may be sufficient in the depicted embodiment that the central axis of the suction opening 21 and the central line CL of the heat exchanger 5 are parallel, but displaced relative to each other in the horizontal direction.

In use, the fan 20 generates suction at the suction opening 21, thereby inducing a fluid flow in direction F (air flow). Thus, air, in particular external air, is introduced through the connection 3 towards the open end 12 of the heat exchanger 5, passes through the upper heat exchanger element 6 and the lower heat exchanger element 7, and is sucked through the suction opening 21 to pass through the connection Piece 4 flows out. The casing 2 thus defines a duct leading from the connection 3 to the connection 4 via the heat exchanger 5 and the fan 20 . In this context, the connection piece 3 and the connection piece 4 define an inlet opening 13 and an outlet opening 14 .

Furthermore, a drain pan 15 is provided inside the housing. The drain pan 15 is divided into two halves 16 , 17 along the length L of the housing 2 in side view. In Fig. 5, the two halves 16, 17 are identified by dashed lines, one half being to the left and the other half being to the right of the dashed line. The drain pan 15 has a lowermost position 18 at which a drain opening 19 is arranged. The bottom of the drain pan 15 slopes towards the drain opening 19 and thus towards the lowest point 18 . Water falling into the drain pan from any component is therefore directed towards the drain opening 19 and lowest point 18 furthest from the fan 20 . Thus, it is prevented that water accumulated in the drain pan can be sucked into the fan 20 and thus into the duct through the opening 14 . The drain opening 19 is directly connected to the drainage system so that the water is drained directly.

Furthermore, in the case 2, on the side facing the drain pan 15 with respect to the line CL, an acoustic and/or heat insulator 22 is provided. In cross section and thus in side view ( FIG. 5 ), the inner surfaces of the drain pan 15 and the spacer 22 , respectively pointing towards the heat exchanger 15 , should be approximated so that the ducts formed in the housing 2 are as symmetrical as possible.

In addition, the distance between the apex 8 and the inlet of the suction opening 21 should be as short as possible in order to reduce the length. In particular, the high velocity area of the fan should not overlap the heat exchanger 5 and/or the drain pan 15 in side view.

On one side of the housing 2, a first refrigerant pipe connection 34 and a second refrigerant pipe connection 35 for connecting the heat source heat exchanger unit 31 to the refrigerant pipes of the refrigerant circuit can be seen. In addition, a connection port 36 for connecting the drain opening 19 to a drain system (not shown) extends from the same side surface of the housing 2 as the refrigerant pipe connectors 34 and 35 .

Apart from the connections 3 and 4 and the refrigerant line connections 34 and 35 and the connection 36 to the drainage system, the housing 2 is completely closed. Thus, as can be seen from FIG. 5 , the housing may be soundproof, thus encapsulated, to prevent any noise, for example from a fan, from being transmitted to the space to be conditioned. In addition, since the compressor 37 is not provided in the housing 2 but in the compressor unit 32 as described below, no air transfer is caused and flows into the air duct connected to the outside of the building via the heat source heat exchanger unit 31. Compressor noise.

The compressor unit 32 has a housing 44 (first housing), wherein, in FIG. 4 , the front wall of the housing 44 and the corresponding sound insulation have been removed to partially show the interior of the housing 44 . The compressor 37 (see FIG. 1 ) is disposed in the housing 44 . In addition, all other components of the compressor unit described below (if present) will also be located in the housing 44 . Additionally, the compressor unit may include an optional accumulator 38 and four-way valve 39 .

In addition, the compressor unit 32 includes a sub-cooling heat exchanger 40 and a sub-cooling expansion valve 41 . The secondary cooling heat exchanger is a tube heat exchanger.

The compressor unit 32 also includes a first refrigerant pipe connection 42 and a second refrigerant pipe connection 43 (first heat source heat exchanger unit port and second heat source heat exchanger unit port) as shown in FIG. 4 .

Shut-off valves 45 (two shut-off valves, one for each connection 42, 43) may be provided adjacent to the first refrigerant pipe connection 42 and the second refrigerant pipe connection 43, respectively.

In addition, the third refrigerant pipe connection 46 and the fourth refrigerant pipe connection 47 (the first indoor unit port and the second indoor unit port) are provided for connecting to one or more refrigerant pipes arranged in fluid communication with the space to be conditioned. Indoor unit 50 (in this embodiment, one). Shut-off valves 48 (two shut-off valves, one for each connection 46 , 47 ) are also provided adjacent to the first refrigerant pipe connection 46 and the second refrigerant pipe connection 47 , respectively.

Ports 42, 43 and 46, 47 are located near the front of the compressor unit to improve serviceability. In particular, as shown in FIG. 4, the ports are easily accessible if the front wall of the housing 44 and corresponding insulator are removed.

In addition, the refrigerant pipe 80 (the second refrigerant pipe) connects the refrigerant pipe connection 42 and the refrigerant pipe connection 47 with the four-way valve 39, the compressor 37, the collector 38, and the refrigerant pipe 57 inserted in sequence. The connecting piece 81 of the connecting piece 82 leading to the refrigerant pipe 52 is connected with the four-way valve 39 .

Considering the cooling operation (solid arrow in FIG. 1 ), the above-mentioned components are arranged in the following order from the refrigerant pipe connection 47 to the refrigerant pipe connection 42: four-way valve 39, collector 38, compressor 37, Four-way valve 39 and refrigerant pipe connection piece 42 . Considering the heating operation (dotted arrow in Fig. 1), the above-mentioned components are arranged in the following order from the refrigerant pipe connection 42 to the refrigerant pipe connection 47: four-way valve 39, collector 38, compressor 37, four-way Through valve 39 and refrigerant pipe fitting 47.

Furthermore, a refrigerant pipe 49 connects the first refrigerant pipe connection 43 with the third refrigerant pipe connection 46 . The sub-cooling heat exchanger 40 is configured for heat exchange between the refrigerant flowing in the refrigerant pipe 49 and the refrigerant flowing in the refrigerant pipe 52 . The sub-cooling expansion valve 41 is provided in the refrigerant pipe 52 between the sub-cooling heat exchanger and the refrigerant pipe connection 43 . In other words, the sub-cooling expansion valve 41 is disposed between the refrigerant pipe 52 and the connection of the refrigerant pipe 49 and the sub-cooling heat exchanger 40 . In any case, the sub-cooling expansion valve 41 is provided upstream of the sub-cooling heat exchanger 40 of the refrigerant pipe 52 during heating and cooling operations.

The refrigerant pipe 51 connects the collector 38 and the four-way valve 39 . In addition, one end of the refrigerant pipe 52 (gas refrigerant pipe) is connected to the refrigerant pipe 49 , and the other end is connected to the refrigerant pipe 51 . In addition, the refrigerant pipe 57 connects the refrigerant pipe 49 and the refrigerant pipe 51 , so that the pressure regulating valve 58 is integrated at an intermediate position at the refrigerant pipe 57 .

The casing 44 of the compressor unit 32 may be soundproofed so that the noise generated by the compressor 37 can be prevented from leaking from the casing to disturb people in the building. Furthermore, the housing 44 can, due to its compact size, be placed on the floor for ease of installation and maintenance, even under cabinets in kitchens or other technical equipment rooms. The housing 44 may also include legs 59 as shown in FIG. 4 for arranging and securing the housing 44 on a horizontal support surface. The dimensions of the housing 44 (in particular in relation to its height, width and depth) comply with DIN EN 1116 for kitchen furniture and kitchen appliances.

An example of the indoor unit 50 includes connections to the compressor unit 32 via the third refrigerant pipe connection 54 and the fourth refrigerant pipe connection 55 and the third refrigerant connection 46 and the fourth refrigerant connection 47 respectively. The indoor heat exchanger 53 (second heat exchanger) to which the refrigerant pipes are respectively connected. Optionally, the indoor unit 50 may include an indoor expansion valve 56 disposed between the indoor heat exchanger 53 and the third refrigerant pipe connection 54 . In principle, the indoor unit 50 can be configured as a common indoor unit used in these air conditioners in principle.

As best seen in FIG. 2 , an air conditioner may be installed in a building 70 . In a possible implementation, the heat source heat exchanger unit 31 may be arranged in the ceiling 71 of the space to be conditioned 72 and be hidden in the ceiling 71 . The connections 3 and 4 are preferably connected to the air duct 73 such that the housing 2 of the heat source heat exchanger unit 31 forms part of the air duct 73 . The ends of the air duct 73 are exposed to the outside of the building at two ends 74 and 75, so that outside air can be drawn in through the end 74, pass through the heat exchanger 5 of the heat source heat exchanger unit 31 and pass through the end 75 discharge.

The heat source heat exchanger unit 31 is connected to the compressor unit 32 through the refrigerant pipe 76 using the refrigerant pipe connectors 34 , 35 and 43 , 42 respectively. The compressor unit 32 is again connected to the indoor unit 50 using third to fourth refrigerant pipe connections 46 , 47 and 54 , 55 respectively.

The above air conditioner operates as follows. During refrigeration operation (solid arrow in FIG. 1 ), refrigerant flow entering the compressor unit 32 at the refrigerant pipe connection 47 passes through the four-way valve 39 and is directed into the collector 38 . While passing through the collector, the associated liquid refrigerant is separated from the gaseous refrigerant and the liquid refrigerant is temporarily stored in the collector 38 .

Subsequently, gaseous refrigerant is introduced into the compressor 37 and compressed. The compressed refrigerant is introduced into the heat source heat exchanger unit 31 via the first refrigerant pipe connections 42 , 35 and the refrigerant pipe 71 . The refrigerant passes through the heat exchanger 5 with the plates 6, 7 of the heat source heat exchanger unit 31, whereby the refrigerant condenses (the heat exchanger 5 acts as a condenser). Thus, heat is transferred to the outside air passing in parallel through the heat exchanger elements 6 , 7 of the heat exchanger 5 . Expansion valve 33 is fully open to avoid high pressure drop during cooling. The refrigerant then flows into the compressor unit 32 via the third refrigerant pipe connection 34 , 43 and the refrigerant pipe. In the compressor unit 32 , the refrigerant flows partly through the refrigerant pipe 52 , through the secondary cooling expansion valve 41 and the secondary cooling heat exchanger 40 , and partly through the refrigerant introduced via the third refrigerant pipe connection 46 . The refrigerant pipe 49 , the refrigerant pipe and the third refrigerant connection 54 enter the indoor unit 50 . Then, the refrigerant is further expanded by the indoor expansion valve 56 , evaporated in the heat exchanger 53 (the heat exchanger 53 functions as an evaporator), thereby cooling the space to be conditioned 72 . Thus, heat is transferred from the air in the space to be conditioned to the refrigerant flowing through the heat exchanger 53 . In cooling, the main purpose of the sub-cooling heat exchanger 40 is to sub-cool the liquid refrigerant flowing to the indoor unit 50 through the refrigerant pipe 49 . Finally, the refrigerant is again introduced into the compressor unit 32 via the fourth refrigerant pipe connection 55, 47 and the refrigerant pipe.

It is well known that the performance of an indoor air conditioner is equal to the product of enthalpy flow and mass flow. Thus, as the enthalpy flow increases, a reduced mass flow can be used. A secondary cooling heat exchanger is used to increase the enthalpy flow in the chamber. Therefore, mass flow can be reduced without compromising performance. As a result, the pressure drop in the liquid line can be reduced, so that the compressor 37 needs to deliver less work, thereby increasing the efficiency of the overall system.

During heating, the circuit is reversed, wherein heating is shown with dashed arrows in FIG. 1 . The process is in principle the same. However, during heating, the first heat exchanger 5 functions as an evaporator, while the second heat exchanger 53 functions as a condenser. In particular, the refrigerant is introduced into the compressor unit 32 via the first refrigerant pipe connection 42, flows into the collector 38 via the four-way valve 39, is then compressed in the compressor 37, then flows into the four-way valve 39 and Through the fourth refrigerant pipe connection 47, 55 and the refrigerant pipe, enters the indoor unit 50 (specifically, the indoor heat exchanger 53) in which the refrigerant is condensed (the indoor heat exchanger 53 functions as a condenser). The refrigerant is then expanded by the expansion valve 56 and reintroduced via the third refrigerant pipe interconnection 54, 46 into the compressor unit 32 where it flows into the pipe 49 and through the secondary The heat exchanger 40 is cooled.

By having refrigerant injection after the evaporator, the suction superheat before the compressor can be optimized. As a result, discharge temperatures can be lowered, with the attendant benefits of better system efficiency and longer life. During heating, the secondary cooling heat exchanger 40 is used to improve the refrigerant quality at the compressor inlet via the refrigerant pipe 52 connected to the refrigerant pipe 51 upstream of the compressor 37 at the suction of the refrigerant pipe 52 side. In addition, the sub-cooling heat exchanger 40 is used to evaporate the two-phase refrigerant in the refrigerant pipe 49 as needed.

Subsequently, part of the refrigerant flows into the refrigerant pipe 52, expands in the sub-cooling expansion valve 41 and flows through the sub-cooling heat exchanger 40, and then is reintroduced into the refrigerant pipe 51 upstream of the collector 38, thereby convecting The refrigerant passing through the refrigerant pipe 49 of the sub-cooling heat exchanger 40 is pre-cooled. The remainder flows into the heat source heat exchanger unit 31 via the second refrigerant pipe connections 43 , 34 and the refrigerant pipes. The refrigerant is further expanded by the main expansion valve 33 in the heat source heat exchanger unit 31, then evaporates in the heat exchanger 5 (the heat exchanger 5 serves as an evaporator), and then passes through the first refrigerant pipe connection pieces 35 and 42 and The refrigerant tubing is reintroduced into the compressor unit 32 .

Because of the separation of the compressor unit 32 and the heat source heat exchanger unit 31, the compressor unit 32 can be installed in an area insensitive to noise so that no noise disturbance is caused by the compressor even if it is installed indoors. Additionally, the housing 44 of the compressor unit 32 can be well insulated with sound insulation. In addition, due to the separation concept between the heat source heat exchanger unit 31 and the compressor unit 32 that can be transmitted into the space to be conditioned, there is no compressor noise in the air flowing through the heat source heat exchanger unit 31 .

Since the unit weight of the heat source heat exchanger unit 31 and the compressor unit 32 is light, installation is improved. Additionally, the compressor unit 32 may be floor mounted so that there is no need to lift a heavy compressor unit. Since the footprint (width and depth) of the compressor unit 32 is relatively small and the height of the compressor unit 32, especially its housing, is low, the compressor unit 32 can even be concealed when arranged in the room to be conditioned, Such as under a cabinet or counter.

The heat source heat exchanger unit 31 also has the advantage of not being disturbed by noise. Since no compressor is included in the heat source heat exchanger unit 31, the only sound that can be entrained in the airflow is the noise of the fan, so that the noise in the airflow is drastically reduced. Furthermore, the housing 2 can be completely closed into the space to be conditioned 72 so that no sound is transmitted into the space. In addition, the housing can be well insulated with sound insulation. Because the height of the heat source heat exchanger unit 31 is low, it is easy to hide the unit in, for example, the ceiling. Therefore, the unit 31 is invisible from the outside. Installation is also improved due to the lower height of the heat source heat exchanger unit 31 compared to units with a compressor in the same housing. In particular, the lower height is aided by the use of a "V" shaped heat exchanger 5, enabling high efficiency and relatively low height.

Because the secondary cooling unit and especially the secondary cooling heat exchanger are integrated into the compressor unit instead of the heat source heat exchanger unit, a long gaseous refrigerant line connecting the heat source heat exchanger with the suction side of the compressor can be compressed The shorter line 52 contained in the machine unit is replaced. Therefore, the large-diameter piping required to flow the gaseous refrigerant can be shortened. In other words, the heat source heat exchanger unit and the indoor unit can be avoided by placing the sub-cooling heat exchanger in the compressor unit and connecting the refrigerant piping connecting the heat source heat exchanger module with the indoor unit through the compressor unit in a loop. Additional routes between units.

If the secondary cooling heat exchanger is provided in the heat source heat exchanger module and the fluid connection between the units 31 and 50 will not go around through the casing 44 of the compressor unit 32 but directly, then the third heat source heat exchanger must At the compressor unit 32 there is an additional line connecting the compressor unit 32 and the heat source heat exchanger unit 31 to realize the line 52 . The present embodiment is therefore improved compared to the present case, with the result that installation is simpler and less expensive to install.

In addition, since the main expansion valve 33 is provided in the heat source heat exchanger unit 31, the refrigerant pressure drop caused by the relatively long refrigerant piping between the compressor unit 32 and the heat source heat exchanger unit 31 can be compensated and the two-phase flow Noise can be reduced at least to some extent.

FIG. 6 shows a circuit diagram of an air conditioner according to a modification of the configuration shown in FIG. 1 . The difference between the configurations in Figures 1 and 6 is the use of a heat source heat exchanger module 31' configured to utilize a water heat source.

The air conditioner according to this modification has a heat source unit 30 including a heat source heat exchanger unit 31', a cooling tower 90, and a compressor unit 32. The heat source heat exchanger unit 31' works in cooperation with the cooling tower 90 to serve as a source of hot water.

During cooling operation (solid arrow in FIG. 8 ), gaseous refrigerant is introduced into the compressor 37 and compressed. The compressed refrigerant is introduced into the heat source heat exchanger unit 31' via the first refrigerant pipe connections 42, 43 and the refrigerant pipe 76. The refrigerant passes through the coolant circuit portion of the water-refrigerant heat exchanger 5' of the heat source heat exchanger unit 31', whereby the refrigerant condenses (the water-refrigerant heat exchanger 5' functions as a condenser). Thus, heat is transferred to the water passing through the water circuit part of the water-refrigerant heat exchanger 5'. Expansion valve 33 is fully open to avoid high pressure drop during cooling. The refrigerant then flows into the compressor unit 32 via the third refrigerant pipe connection 34 , 43 and the refrigerant pipe.

Water is circulated through the water loop comprising the cooling tower 90 and the water loop portion of the water-refrigerant heat exchanger 5'. At the cooling tower 90, the circulating water releases heat, thereby being cooled.

Regarding the installation, the heat source heat exchanger unit 31' may be arranged in the ceiling of the space to be conditioned, while the cooling tower 90 may be arranged, for example, on the roof of a building.

A boiler plant (not shown) for heating circulating water may also be used instead of or in addition to the cooling tower 90 for the heating operation.

Claims (7)

1. a kind of compressor unit (32) for air regulator, the compressor unit (32) includes：

Compressor (37), the compressor are arranged in the first housing (44), and

First heat exchanger of heat source unit port (43) and Secondary Heat Source heat exchanger unit port (42), the first thermal source heat Exchanger unit port and Secondary Heat Source heat exchanger unit port are configured to the compressor unit being connected to the sky The heat exchanger of heat source (5) of at least one heat exchanger of heat source unit (31) of gas adjuster, the heat exchanger of heat source are set In the second housing (2) separated with first housing and be configured to thermal source exchanged heat,

Unit port (47) in first indoor unit port (46) and second Room, in the first indoor unit port and second Room Unit port is configured to the compressor unit being connected at least one indoor unit (50) of the air regulator Indoor heat converter (53),

First refrigerant pipe fitting (49), the first refrigerant pipe fitting fluidly connect the first heat exchanger of heat source unit port (43) and the first indoor unit port (46), and

Pair cooling heat exchanger (40), the secondary cooling heat exchanger are arranged in the first shell body and are fluidly connected to institute The first refrigerant pipe fitting is stated, to carry out heat transfer with the refrigerant that will flow through the first refrigerant pipe fitting.

2. compressor unit according to claim 1, the compressor unit also includes：

Second refrigerant pipe fitting (80), the second refrigerant pipe fitting fluidly connect the Secondary Heat Source heat exchanger unit port (42) unit port (47) and in the second Room, in the second refrigerant pipe fitting, the compressor (37) and four-way valve (39) it is plugged between the Secondary Heat Source heat exchanger unit port and the second refrigerant unit port, and

Bypass channel (52), the bypass channel is between the compressor and the four-way valve (39) in the compressor (37) Suction side be fluidly connected to the second refrigerant pipe fitting, the secondary cooling heat exchanger (40) is fluidly connected to the bypass Passage (52), so as to the refrigerant in the bypass channel is flowed into and the refrigeration flowed into the first refrigerant pipe fitting (49) Heat transfer is carried out between agent.

3. compressor unit according to claim 1 or 2, wherein, the compressor unit (32) does not include the air The main expansion valve (33) of adjuster.

4. the compressor unit according to any one of preceding claims, the compressor unit is additionally included in the pressure It is located at the oil eliminator of the discharge side of the compressor (37) between contracting machine and four-way valve (39).

5. a kind of heat source unit for air regulator, the heat source unit includes：

Compressor unit (32) according to any one of preceding claims, and

Heat exchanger of heat source unit (31), the heat exchanger of heat source unit have heat exchanger of heat source (5), the thermal source heat exchange Device be arranged in the second housing (2) separated with first housing (44) and be configured to thermal source exchanged heat, wherein, institute Heat exchanger of heat source unit is stated via the first heat exchanger of heat source unit port (43) and the Secondary Heat Source heat exchanger Unit port (42) is fluidly connected to the compressor unit.

6. heat source unit according to claim 5, wherein, the main expansion valve (33) of the air regulator is arranged on described In second housing (2).

7. a kind of air regulator, the air regulator has the heat source unit according to claim 5 or 6, wherein, at least One indoor unit (50) connects via unit port (47) fluid in the first indoor unit port (46) and the second Room It is connected to the compressor unit (32).