CN112351651A - Condenser, air conditioner special for air cooling machine room and control method of air conditioner special for air cooling machine room - Google Patents

Abstract

The embodiment of the invention provides a condenser, a special air conditioner for an air cooling machine room and a control method of the special air conditioner for the air cooling machine room. Wherein the condenser comprises at least one condensing unit, each condensing unit comprising a first split manifold assembly and a second split manifold assembly. The two ends of the first shunting and collecting assembly can be connected with the air inlet main pipe and the liquid outlet main pipe, and the two ends of the second shunting and collecting assembly can be connected with the air inlet main pipe and the liquid outlet main pipe. The first shunting and collecting assembly and the second shunting and collecting assembly can be switched between a serial state of being connected between the air inlet main pipe and the liquid outlet main pipe in series and a parallel state of being connected between the air inlet main pipe and the liquid outlet main pipe in parallel. The condenser can be matched with various refrigeration modes of the special air conditioner for the air cooling machine room in different working states, can fully utilize a natural cold source, reduces the working time of the compressor, and has better energy conservation.

Description

Condenser, air conditioner special for air cooling machine room and control method of air conditioner special for air cooling machine room

Technical Field

The invention relates to the technical field of refrigeration air conditioners, in particular to a condenser, a special air conditioner for an air cooling machine room and a control method of the special air conditioner for the air cooling machine room.

Background

At present, a data center machine room is divided into a cloud computing data center and an edge data center. Wherein, large-scale cloud computing data center adopts chilled water system mostly. The edge data center is wide in coverage, small in size and possibly has a water shortage scene, and is suitable for adopting an air cooling system.

In the air cooling system for the data center, the most common product is a special air conditioner for a conventional air cooling machine room. The principle of the system is mechanical compression refrigeration all year round, and the main components comprise a compressor, a condenser, a throttle valve and an evaporator. However, in consideration of the cost of the whole life cycle, the air cooling system which can fully utilize natural cold sources except for hot summer and warm winter areas is a more reasonable special air conditioner product for the air cooling machine room, namely a refrigerant pump-compressor double-circulation system.

The refrigerant pump-compressor double circulation system combines the heat pipe principle, when the outdoor temperature is lower, especially under the winter condition, the refrigerant pump-compressor double circulation system can utilize the outdoor natural cold source for cooling, and the high-efficiency heat exchange between the refrigerant and the outdoor natural cold source is realized by the drive of the pump. Under different outdoor temperatures, different refrigeration modes, namely a compression refrigeration mode, a mixed refrigeration mode and a refrigerant pump refrigeration mode, can be operated.

There are relatively mature products. In a conventional refrigerant pump-compressor dual cycle system, the compressor and the refrigerant pump are located on a single conduit and connected in series. Under different refrigeration modes, the condenser is shared. The existing condenser is generally designed according to the requirements of compression refrigeration modes, and the condenser with the same flow path structure used in different refrigeration modes can cause that the air conditioner special for the air cooling machine room cannot fully utilize a natural cold source, so that the starting time of the compressor is prolonged, and the energy saving performance is poor.

Disclosure of Invention

The embodiment of the invention provides a condenser, a special air conditioner for an air cooling machine room and a control method of the special air conditioner for the air cooling machine room, which are used for solving the problems that in the prior art, the special air conditioner for the air cooling machine room uses the condenser with the same flow path structure in different refrigeration modes, so that a natural cold source cannot be fully utilized, the starting time of a compressor is prolonged, and the energy saving performance is poor.

According to an embodiment of the first aspect of the invention, there is provided a condenser comprising at least one condensing unit, each of said condensing units comprising a first and a second split flow concentrating assembly.

The two ends of the first shunting and collecting assembly can be connected with the air inlet main pipe and the liquid outlet main pipe, and the two ends of the second shunting and collecting assembly can be connected with the air inlet main pipe and the liquid outlet main pipe.

The first flow dividing and collecting assembly and the second flow dividing and collecting assembly can be switched between a serial state of being connected between the air inlet main pipe and the liquid outlet main pipe in series and a parallel state of being connected between the air inlet main pipe and the liquid outlet main pipe in parallel.

According to an embodiment of the present invention, the first flow-splitting and collecting assembly includes a first flow-splitting pipe and a first collecting pipe, and the second flow-splitting and collecting assembly includes a second flow-splitting pipe and a second collecting pipe.

The first collecting pipe and the second collecting pipe are connected through a communicating pipeline, the first collecting pipe and the second collecting pipe are both connected with the air inlet main pipe, and the first collecting pipe and the second collecting pipe are both connected with the liquid outlet main pipe.

According to an embodiment of the present invention, a first solenoid valve is disposed between the first collecting pipe and the second collecting pipe, a second solenoid valve is disposed at an inlet of the second collecting pipe, and a third solenoid valve is disposed at an outlet of the first collecting pipe.

According to an embodiment of the second aspect of the invention, a special air conditioner for an air cooling machine room is provided, which comprises a liquid storage tank, a refrigerant pump, a throttling device, an indoor air conditioner terminal, a gas-liquid separator, a compressor and the condenser.

The outlet of the liquid storage tank is connected with the inlet of the refrigerant pump, a refrigerant pump bypass pipeline is arranged on the refrigerant pump, the outlet of the refrigerant pump is connected with the inlet of the throttling device, and a throttling device bypass pipeline is arranged on the throttling device.

The outlet of the throttling device is connected with the tail end of the indoor air conditioner, the tail end of the indoor air conditioner is connected with the inlet of the gas-liquid separator, the outlet of the gas-liquid separator is connected with the inlet of the compressor, and the compressor is provided with a compressor bypass pipeline.

The outlet of the compressor is connected with the air inlet main pipe, and the liquid outlet main pipe is connected with the inlet of the liquid storage tank.

The refrigerant pump bypass pipeline is provided with a fourth electromagnetic valve, the throttling device bypass pipeline is provided with a fifth electromagnetic valve, and the compressor bypass pipeline is provided with a sixth electromagnetic valve.

According to the embodiment of the invention, the special air conditioner for the air cooling machine room is configured to be capable of operating in a compression refrigeration mode.

Wherein, in the compression refrigeration mode, the compressor is started, the refrigerant pump is closed, the fourth solenoid valve is turned on, the fifth solenoid valve and the sixth solenoid valve are turned off, and the condenser is in the parallel state, wherein the first solenoid valve is turned off, and the second solenoid valve and the third solenoid valve are turned on.

According to the embodiment of the invention, the air conditioner special for the air cooling machine room is configured to be capable of operating in a mixed cooling mode.

Wherein, in the hybrid cooling mode, the compressor is started, the refrigerant pump is started, the fourth solenoid valve, the fifth solenoid valve, and the sixth solenoid valve are turned off, and the condenser is in the parallel state, wherein the first solenoid valve is turned off, and the second solenoid valve and the third solenoid valve are turned on.

According to the embodiment of the invention, the special air conditioner for the air cooling machine room is configured to be capable of operating in a refrigeration mode of a refrigerant pump.

Wherein, in the refrigerant pump cooling mode, the compressor is off, the refrigerant pump is on, the fourth solenoid valve is off, the fifth solenoid valve and the sixth solenoid valve are on, and the condenser is in the series state, wherein the first solenoid valve is on, and the second solenoid valve and the third solenoid valve are off.

According to an embodiment of the third aspect of the present invention, there is provided a control method for an air conditioner dedicated to an air-cooled room as described above, including:

and controlling the refrigerant pump, the throttling device and the compressor to start and stop, so that the air-cooled machine room special air conditioner is switched among a compression refrigeration mode, a mixed refrigeration mode and a refrigerant pump refrigeration mode, and the condenser is correspondingly controlled to be switched between a parallel state and a series state.

According to an embodiment of the present invention, the control method further includes:

starting a compressor, closing a refrigerant pump, switching on a fourth electromagnetic valve, and switching off a fifth electromagnetic valve and a sixth electromagnetic valve to enable the special air conditioner for the air cooling machine room to be in the compression refrigeration mode, and simultaneously switching off a first electromagnetic valve, and switching on a second electromagnetic valve and a third electromagnetic valve to enable the condenser to be in a parallel state;

starting a compressor, starting a refrigerant pump, turning off a fourth electromagnetic valve, a fifth electromagnetic valve and a sixth electromagnetic valve to enable the special air conditioner for the air cooling machine room to be in the mixed refrigeration mode, and simultaneously turning off a first electromagnetic valve, and turning on a second electromagnetic valve and a third electromagnetic valve to enable the condenser to be in a parallel state;

and closing the compressor, starting the refrigerant pump, switching off the fourth electromagnetic valve, and switching on the fifth electromagnetic valve and the sixth electromagnetic valve to enable the special air conditioner for the air cooling machine room to be in a refrigeration mode of the refrigerant pump, and simultaneously switching on the first electromagnetic valve, and switching off the second electromagnetic valve and the third electromagnetic valve to enable the condenser to be in a series connection state.

According to an embodiment of the present invention, the control method further includes: when the air conditioner special for the air cooling machine room is switched from the compression refrigeration mode or the mixed refrigeration mode to the refrigeration mode of the refrigerant pump, the compressor is closed firstly, and then the condenser is adjusted to be switched from the parallel state to the serial state;

when the air conditioner special for the air cooling machine room is switched from the refrigerant pump refrigeration mode to the compression refrigeration mode or the mixed refrigeration mode, the condenser is firstly adjusted to be switched from the serial connection state to the parallel connection state, and then the compressor is started;

when the condenser is switched from the parallel state to the series state, the first electromagnetic valve is firstly switched on, then the second electromagnetic valve is switched off, and finally the third electromagnetic valve is switched off;

when the condenser is switched from the series connection state to the parallel connection state, the third electromagnetic valve is firstly switched on, then the second electromagnetic valve is switched on, and finally the first electromagnetic valve is switched off.

Compared with the condenser in the prior art, the condenser provided by the embodiment of the invention is provided with the first shunt current-collecting component and the second shunt current-collecting component, and the first shunt current-collecting component and the second shunt current-collecting component can be connected in series or in parallel, so that the condenser can work in a parallel state or a series state selectively, and further the condenser is matched with three modes of an air conditioner special for an air cooling machine room.

Based on the fact that the air conditioner special for the air cooling machine room is in a compression refrigeration mode and a mixed refrigeration mode, the condenser is switched to be in a parallel connection state:

in the compression refrigeration mode and the hybrid refrigeration mode, the compressor is in an operating state. The compressor works to enable a condensation side pipeline of the air conditioner special for the air cooling machine room to be in a high-pressure high-temperature state, and the lower condensation pressure is beneficial to improving the refrigerating capacity of the condenser. The condensing pressure of the condenser in the parallel state is lower than that of the condenser in the series state, so that a better refrigerating effect can be realized; meanwhile, the pressure drop of the inlet and the outlet of the condenser in the parallel state is smaller than that of the inlet and the outlet of the condenser in the serial state, which is beneficial to maintaining the stability of the operation of the compressor; in the parallel state of the condenser, the length of the condenser flow passage through which the refrigerant flows is the length of the single condenser tube flow passage.

Based on the fact that the air conditioner special for the air cooling machine room is in a refrigerant pump refrigeration mode, the condenser is switched to be in a series connection state:

in the refrigeration mode of the refrigerant pump, the fluid pressure on the condensation side is low, the temperature difference between the refrigerant and the outdoor air is limited, and the heat transfer coefficient needs to be improved to ensure the heat exchange effect. The condenser is in a series state, so that the flow speed and the heat transfer coefficient of the refrigerant in the condenser are larger; in addition, when the condenser is in a serial state, the refrigerant flows through the first shunt and flow-collecting assembly and the second shunt and flow-collecting assembly to be condensed twice, the length of a flow passage of the condenser flowing through the condenser is twice that of the flow passage of the condenser in a parallel state, the refrigerant is in full contact with outdoor low-temperature air and exchanges heat, and the refrigerating capacity of the condenser in a refrigerant pump mode is improved.

Through the structure, the special machine room for the air-cooled air conditioner can be matched with different working states of the condenser under different operation modes, a natural cold source is fully utilized, the working time of the compressor is shortened, and the energy-saving performance is better.

Further, the air conditioner dedicated to the air-cooled machine room provided by the embodiment of the invention also has the advantages as described above because the air conditioner includes the condenser as described above.

Furthermore, the control method for the air conditioner special for the air cooling machine room, provided by the embodiment of the invention, can realize that the condenser is correspondingly controlled to be switched between a parallel state and a serial state when the air conditioner special for the air cooling machine room is switched among the compression refrigeration mode, the mixed refrigeration mode and the refrigerant pump refrigeration mode, so as to realize better matching. The control method of the special air conditioner for the air cooling machine room is simple to operate.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of a condenser according to an embodiment of the present invention;

FIG. 2 is a first schematic plan view of a condenser according to an embodiment of the present invention;

FIG. 3 is a schematic plan view of a condenser according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a plane structure of a condenser according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a planar structure of a condenser according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a system of an air conditioner dedicated for an air cooling machine room according to an embodiment of the present invention;

fig. 7 is a first flowchart of a control method of an air conditioner dedicated for an air cooling machine room according to an embodiment of the present invention;

fig. 8 is a flowchart of a second method for controlling an air conditioner dedicated for an air-cooled machine room according to an embodiment of the present invention;

fig. 9 is a flow chart of a third method for controlling an air conditioner dedicated for an air-cooled machine room according to an embodiment of the present invention.

Reference numerals:

1: a liquid storage tank; 2: a refrigerant pump; 3: a fourth solenoid valve; 4: a throttling device; 5: a fifth solenoid valve; 6: an indoor air conditioner terminal; 7: a gas-liquid separator; 8: a compressor; 9: a sixth electromagnetic valve; 10: a condenser; 101 a first shunt tube; 102: a first header; 103: a second shunt pipe; 104: a second header; 105: a first solenoid valve; 106: a second solenoid valve; 107: a third electromagnetic valve; 108: a condenser tube; 11: an intake manifold; 12: and (4) a liquid outlet main pipe.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification to make the purpose, technical solution, and advantages of the embodiments of the present invention more clear, and the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are a part of embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The condenser, the air conditioner dedicated to the air-cooled machine room, and the control method of the air conditioner dedicated to the air-cooled machine room according to the embodiments of the present invention are described below with reference to fig. 1 to 9. It should be understood that the following description is only exemplary embodiments of the present invention and does not constitute any particular limitation of the present invention.

As shown in fig. 1 to 5, an embodiment of a first aspect of the present invention provides a condenser 10. The condenser 10 includes at least one condensing unit, each condensing unit including a first split manifold assembly and a second split manifold assembly.

The two ends of the first shunting and collecting assembly can be connected with the air inlet main pipe 11 and the liquid outlet main pipe 12, and the two ends of the second shunting and collecting assembly can be connected with the air inlet main pipe 11 and the liquid outlet main pipe 12.

The first flow dividing and collecting assembly and the second flow dividing and collecting assembly can be switched between a serial state in which the first flow dividing and collecting assembly and the second flow dividing and collecting assembly are connected in series between the air inlet main pipe 11 and the liquid outlet main pipe 12 and a parallel state in which the first flow dividing and collecting assembly and the second flow dividing and collecting assembly are connected in parallel between the air inlet main pipe 11 and the liquid outlet main pipe 12.

It should be understood herein that the condenser 10 comprises at least one condensing unit, and the number of condensing units can be freely increased or decreased as required to meet the required size of condensing area.

Meanwhile, it should be noted that the arrangement mode of each condensing unit is not limited in any way, and the condensing units can be freely matched and installed according to requirements. For example, the condensing units may be arranged in a straight shape, a U shape, a V shape, or the like.

Compared with the condenser in the prior art, the condenser 10 provided by the embodiment of the invention is provided with the first shunt current-collecting component and the second shunt current-collecting component, and the first shunt current-collecting component and the second shunt current-collecting component can be connected in series or in parallel, so that the condenser 10 can work in a parallel state or a series state selectively, and further is matched with three modes of the special air conditioner for the air-cooled machine room.

Based on that the special air conditioner for the air cooling machine room is in a compression refrigeration mode and a mixed refrigeration mode, the condenser 10 is switched to be in a parallel state:

in the compression refrigeration mode and the hybrid refrigeration mode, the compressor is in an operating state. The compressor works to make the condensation side pipeline of the special air conditioner for the air cooling machine room in a high-pressure and high-temperature state, and the lower condensation pressure is helpful to improve the refrigerating capacity of the condenser 10. The condensing pressure of the condenser 10 in the parallel state is lower than that in the series state, so that a better refrigerating effect can be realized; meanwhile, the pressure drop of the inlet and the outlet of the condenser 10 in the parallel state is smaller than that of the inlet and the outlet in the serial state, which is beneficial to maintaining the stability of the operation of the compressor; in the parallel state of the condensers 10, the length of the flow passage of the condenser 10 through which the refrigerant flows is equal to the length of the flow passage of the single condensation tube 108.

Based on the special air conditioner for the air-cooled machine room being in the refrigeration mode of the refrigerant pump, the condenser 10 is switched to the series state:

in the refrigeration mode of the refrigerant pump, the fluid pressure on the condensation side is low, the temperature difference between the refrigerant and the outdoor air is limited, and the heat transfer coefficient needs to be improved to ensure the heat exchange effect. The condenser 10 is in a series state, the flow velocity and the heat transfer coefficient of the refrigerant in the condenser 10 are larger; in addition, when the condenser 10 is in a series state, the refrigerant flows through the first and second shunt and current collecting assemblies to be condensed twice, and the length of the flow channel of the condenser 10 through which the refrigerant flows is twice that of the flow channel of the condenser in a parallel state, so that the refrigerant can be in full contact with outdoor low-temperature air and exchange heat, and the refrigerating capacity of the condenser 10 in a refrigerant pump mode is further improved.

Through the structure, the special machine room for the air-cooled air conditioner can be matched with different working states of the condenser 10 under different operation modes, a natural cold source is fully utilized, the working time of a compressor is shortened, and the energy-saving performance is better.

In one embodiment of the present invention, the first split manifold assembly comprises a first split pipe 101 and a first manifold 102, and the second split manifold assembly comprises a second split pipe 103 and a second manifold 104.

The first collecting pipe 102 and the second collecting pipe 103 are connected through a communicating pipe, the first collecting pipe 101 and the second collecting pipe 103 are both connected with the air inlet main pipe 11, and the first collecting pipe 102 and the second collecting pipe 104 are both connected with the liquid outlet main pipe 12.

When the condensers 10 are in the parallel state, the connection line between the first header 102 and the second header 103 is in the interrupted state. The refrigerant enters the first shunt tubes 101 and the second shunt tubes 103 from the air inlet manifold 11, then flows through the condenser tubes 108, is conveyed to the first manifold 102 and the second manifold 104, and finally is discharged from the liquid outlet manifold 12.

When the condensers 10 are connected in series, the connection line between the first header 102 and the second header 103 is connected. The refrigerant enters the first branch pipe 101 from the intake manifold 11, flows to the condensation pipe 108, then flows to the first manifold 102, then enters the condensation pipe 108 through the second branch pipe 103, and finally flows to the liquid outlet manifold 12 from the second manifold 104 and is discharged.

In one embodiment of the present invention, a first solenoid valve 105 is disposed between the first collecting pipe 102 and the second collecting pipe 103, a second solenoid valve 106 is disposed at an inlet of the second collecting pipe 103, and a third solenoid valve 107 is disposed at an outlet of the first collecting pipe 102.

In response to the condenser 10 being in the parallel state, the first solenoid valve 105 is turned off, so that the connection line between the first header 102 and the second header 103 is in the off state, and the second solenoid valve 106 and the third solenoid valve 107 are turned on. Refrigerant can flow to the first shunt tubes 101 and the second shunt tubes 103 from the air inlet manifold 11 and enter the condensation tubes 108 for condensation, and finally flows to the liquid outlet manifold 12 from the first manifold 102 and the second manifold 104 for discharge.

In response to the condenser 10 being in the series state, the first solenoid valve 105 is turned on, so that the connection line between the first header 102 and the second header 103 is in the on state, and the second solenoid valve 106 and the third solenoid valve 107 are turned off. The refrigerant can flow from the air inlet manifold 11 to the first branch pipe 101, enter the condensation pipe 108, flow from the first branch pipe 102 to the second branch pipe 103, enter the condensation pipe 108, and finally flow to the liquid outlet manifold 12 through the second branch pipe 104 and be discharged.

In an embodiment of the second aspect of the present invention, as shown in fig. 6, there is provided an air-cooled machine room dedicated air conditioner comprising a liquid reservoir 1, a refrigerant pump 2, a throttling device 4, an indoor air conditioning terminal 6, a gas-liquid separator 7, a compressor 8 and a condenser 10 as described above.

The outlet of the liquid storage tank 1 is connected with the inlet of the refrigerant pump 2, a refrigerant pump bypass pipeline is arranged on the refrigerant pump 2, the outlet of the refrigerant pump 2 is connected with the inlet of the throttling device 4, and a throttling device bypass pipeline is arranged on the throttling device 4.

The outlet of the throttling device 4 is connected with the tail end 6 of the indoor air conditioner, the tail end 6 of the indoor air conditioner is connected with the inlet of the gas-liquid separator 7, the outlet of the gas-liquid separator 7 is connected with the inlet of the compressor 8, and the compressor 8 is provided with a compressor bypass pipeline. The outlet of the compressor 8 is connected with the inlet manifold 11, and the outlet manifold 12 is connected with the inlet of the liquid storage tank 1.

It should be noted herein that the indoor air-conditioning terminal 6 may be any one of a precision air conditioner, a train air conditioner, or a back panel air conditioner.

In yet another embodiment of the present invention, a temperature sensor is provided on the condenser 10 for monitoring the outdoor ambient temperature; a temperature sensor is also arranged at the tail end 6 of the indoor air conditioner and used for monitoring the indoor return air temperature.

When the special air conditioner for air cooling of the machine room works, refrigerant steam flowing out of the indoor air conditioner terminal 6 flows through the gas-liquid separator 7, enters the compressor 8, is compressed, enters the condenser 10 through the air inlet main pipe 11, or directly flows into the air inlet main pipe 11 through the compressor bypass pipeline, enters the condenser 10, is condensed and cooled by the condenser 10, is discharged into the liquid storage tank 1 through the liquid outlet main pipe 12, and the refrigerant in the liquid storage tank 1 is conveyed to the throttling device 4 through the refrigerant pump 2 or the refrigerant pump bypass pipeline, is throttled, flows into the indoor air conditioner terminal 6, or directly flows into the indoor air conditioner terminal 6 through the throttling device bypass pipeline, is refrigerated, and is circulated and reciprocated.

In one embodiment of the invention, a fourth solenoid valve 3 is arranged on a refrigerant pump bypass pipeline, a fifth solenoid valve 5 is arranged on a throttling device bypass pipeline, and a sixth solenoid valve 9 is arranged on a compressor bypass pipeline.

Specifically, when the fourth electromagnetic valve 3 is in the on state, the refrigerant pump 2 stops working, and the refrigerant enters the throttling device 4 or the throttling device bypass pipeline through the refrigerant pump bypass pipeline; when the fourth electromagnetic valve 3 is in an off state, the refrigerant pump 2 is started, and the refrigerant enters the throttling device 4 or the throttling device bypass pipeline from the refrigerant pump 2.

When the fifth electromagnetic valve 5 is in a connection state, the throttling device 4 is closed, and the refrigerant flows to the indoor air conditioner tail end 6 through a throttling device bypass pipeline; when the fifth electromagnetic valve 5 is in an off state, the throttling device 4 is opened, and the refrigerant flows to the indoor air conditioning terminal 6 through the throttling device 4.

When the sixth electromagnetic valve 9 is in a connection state, the compressor 8 stops working, and the refrigerant flows to the air inlet header pipe 11 from the compressor bypass pipeline and then enters the condenser 10; when the sixth solenoid valve 9 is in the off state, the compressor 8 is started and refrigerant flows from the compressor 8 to the intake manifold 11 and into the condenser 10.

In one embodiment of the present invention, the air-cooled machine room dedicated air conditioner is configured to be capable of operating in a compression cooling mode.

In the compression refrigeration mode, the fourth electromagnetic valve 3 is switched on, the refrigerant pump 2 is closed and is in a bypass state, the sixth electromagnetic valve 9 is switched off, the compressor 8 is started, the fifth electromagnetic valve 5 is switched off, and the throttling device 4 is switched on; at the same time, the first solenoid valve 105 is turned off, and the second solenoid valve 106 and the third solenoid valve 107 are turned on, so that the condenser 10 is in a parallel state.

Therefore, refrigerant steam out of the indoor air conditioner terminal 6 enters the compressor 8 after passing through the gas-liquid separator 7, is compressed to a high-temperature and high-pressure state and then enters the condenser 10, is condensed in the condenser 10 in a parallel state, flows to a refrigerant pump bypass pipeline through the liquid storage tank 1, is throttled at the throttling device 4, and finally enters the indoor air conditioner terminal 6 to finish refrigeration.

In one embodiment of the present invention, the air-cooled room-dedicated air conditioner is configured to be capable of operating in a hybrid cooling mode.

In the mixed refrigeration mode, the fourth electromagnetic valve 3 is switched off, the refrigerant pump 2 is started, the sixth electromagnetic valve 9 is switched off, the compressor 8 is started, the fifth electromagnetic valve 5 is switched off, and the throttling device 4 is switched on; at the same time, the first solenoid valve 105 is turned off, and the second solenoid valve 106 and the third solenoid valve 107 are turned on, so that the condenser 10 is in a parallel state.

Therefore, refrigerant steam out of the indoor air conditioner terminal 6 enters the compressor 8 after passing through the gas-liquid separator 7, is compressed to a high-temperature and high-pressure state and then enters the condenser 10, is condensed in the condenser 10 in a parallel state, enters the liquid storage tank 1, is pressurized by the refrigerant pump 2, is conveyed to the throttling device 4 for throttling, and finally enters the indoor air conditioner terminal 6 to finish refrigeration. The start-up of the refrigerant pump 2 increases the circulation pressure, enabling the energy consumption of the compressor 8 to be reduced.

In one embodiment of the invention, the air-cooled machine room dedicated air conditioner is configured to be capable of operating in a refrigerant pump cooling mode.

In the refrigeration mode of the refrigerant pump, the fourth electromagnetic valve 3 is switched off, the refrigerant pump 2 is started, the sixth electromagnetic valve 9 is switched on, the compressor 8 is switched off, the fifth electromagnetic valve 5 is switched on, and the throttling device 4 is in a bypass state; at the same time, the first solenoid valve 105 is turned on, and the second solenoid valve 106 and the third solenoid valve 107 are turned off, so that the condenser 10 is in a series state.

Therefore, under the action of the refrigerant pump 2, refrigerant steam which is discharged from the indoor air conditioner terminal 6 passes through the gas-liquid separator 7 and the compressor bypass pipeline and then enters the condenser 10 in the serial state, fully contacts with an outdoor natural cold source in the condenser 10 for condensation, then enters the liquid storage tank 1, and then is sent to the indoor air conditioner terminal 6 through the action of the refrigerant pump 2 to finish refrigeration.

In the refrigerant pump cooling mode, the refrigerant pump 2 is used to drive the circulation of the refrigerant in the system, and the condenser 10 is connected in series. Therefore, the heat transfer coefficient of the condenser 10 and the contact time of the refrigerant and an external natural cold source can be increased, the natural cold source is fully utilized, and energy is saved.

In an embodiment of the third aspect of the present invention, there is provided a control method for an air conditioner dedicated to an air-cooled machine room as described above, including:

the refrigerant pump 2, the throttling device 4 and the compressor 8 are controlled to start and stop, so that the air conditioner special for the air-cooled machine room is switched among a compression refrigeration mode, a mixed refrigeration mode and a refrigerant pump refrigeration mode, and meanwhile the condenser 10 is correspondingly controlled to be switched between a parallel state and a series state.

In an embodiment of the present invention, the method for controlling an air conditioner dedicated for an air-cooled machine room further includes:

the parallel connection state matching of the compression refrigeration mode and the condenser 10 is realized:

the compressor 8 is started, the refrigerant pump 2 is turned off, the fourth electromagnetic valve 3 is turned on, and the fifth electromagnetic valve 5 and the sixth electromagnetic valve 9 are turned off, so that the air-cooled machine room dedicated air conditioner is in the compression refrigeration mode, and at the same time, the first electromagnetic valve 105 is turned off, and the second electromagnetic valve 106 and the third electromagnetic valve 107 are turned on, so that the condenser 10 is in the parallel state.

The parallel state matching of the hybrid refrigeration mode and the condenser 10 is realized:

the compressor 8 is started, the refrigerant pump 2 is started, the fourth electromagnetic valve 3, the fifth electromagnetic valve 5 and the sixth electromagnetic valve 9 are switched off, so that the special air conditioner for the air cooling machine room is in a mixed refrigeration mode, and meanwhile, the first electromagnetic valve 105 is switched off, and the second electromagnetic valve 106 and the third electromagnetic valve 107 are switched on, so that the condenser 10 is in a parallel connection state.

As can be understood from the above-described embodiments, the compressor 8 is in an operating state in the compression refrigeration mode and the hybrid refrigeration mode. As described above, the condenser 10 has a lower condensing pressure in the parallel state than in the series state, and thus can achieve a better cooling effect; meanwhile, the pressure drop of the inlet and the outlet of the condenser 10 in the parallel state is smaller than that of the inlet and the outlet in the serial state, which is beneficial to maintaining the stability of the operation of the compressor 8.

The matching of the refrigerant pump refrigeration mode and the series state of the condenser 10 is realized:

the compressor 8 is turned off, the refrigerant pump 2 is started, the fourth electromagnetic valve 3 is turned off, and the fifth electromagnetic valve 5 and the sixth electromagnetic valve 9 are turned on, so that the air-cooled machine room dedicated air conditioner is in the refrigerant pump cooling mode, and at the same time, the first electromagnetic valve 105 is turned on, and the second electromagnetic valve 106 and the third electromagnetic valve 107 are turned off, so that the condenser 10 is in the series state.

In the refrigerant pump cooling mode, the refrigerant pump 2 is started and the compressor 8 is turned off. As described above, the condenser 10 is in the series state, the flow velocity and the heat transfer coefficient of the refrigerant in the condenser 10 are larger; in addition, when the condenser 10 is in a series state, the refrigerant flows through the first and second shunt and current collecting assemblies to be condensed twice, and the length of the flow channel of the condenser 10 through which the refrigerant flows is twice that of the flow channel of the condenser in a parallel state, so that the refrigerant can be in full contact with outdoor low-temperature air and exchange heat, and the refrigerating capacity of the condenser 10 in a refrigerant pump mode is further improved.

By the control method, the special air conditioner for the air cooling machine room can be matched with different working states of the condenser 10 in different running modes, a natural cold source is fully utilized, the working time of the compressor 8 is shortened, and the energy-saving performance is better.

In order to maximally ensure the stable operation of the system when the air conditioner special for the air-cooled machine room is switched between the refrigeration modes and the working state of the condenser 10 is switched, the electromagnetic valves need to be connected or closed according to a certain sequence.

Specifically, in an embodiment of the present invention, when the air-conditioning system dedicated to the air-cooling machine room is switched from the compression refrigeration mode or the hybrid refrigeration mode to the refrigerant pump refrigeration mode, the compressor 8 is turned off first, and then the condenser 10 is adjusted to be switched from the parallel state to the series state;

when the air conditioner special for the air cooling machine room is switched from the refrigeration mode of the refrigerant pump to the compression refrigeration mode or the mixed refrigeration mode, the condenser 10 is firstly adjusted to be switched from the serial state to the parallel state, and then the compressor 8 is started.

Furthermore, when the condenser 10 is switched from the parallel state to the series state, the first electromagnetic valve 105 is firstly switched on, then the second electromagnetic valve 106 is switched off, and finally the third electromagnetic valve 107 is switched off;

when the condenser 10 is switched from the series state to the parallel state, the third solenoid valve 107 is first turned on, the second solenoid valve 106 is then turned on, and finally the first solenoid valve 105 is turned off.

For example, specifically, as shown in fig. 7 to 9, in one embodiment of the present invention, the temperature sensor on the condenser 10 detects the outdoor ambient temperature as Td, the temperature sensor on the indoor air conditioning terminal 6 detects the indoor return air temperature as Ti, and a and B are set as preset temperature parameters, wherein a > B, and the setting of a and B is determined by the operating conditions of the air-conditioning dedicated to the air-cooling room and the local climate conditions.

When the Ti-Td is larger than or equal to A, the special air conditioner for the air cooling machine room operates a refrigerant pump refrigeration mode;

when B is less than or equal to Ti-Td and less than A, the special air conditioner for the air cooling machine room operates in a mixed refrigeration mode;

and when the Ti-Td is less than B, the special air conditioner for the air cooling machine room operates in a compression refrigeration mode.

Assuming that the current air-cooling machine room special air-conditioning operation mode is a refrigerant pump refrigeration mode, corresponding to the condenser 10 is in a serial state, when the system detects that B is not less than Ti-Td and is less than A and the temperature state does not change obviously within a certain time, the operation mode of the air-cooling machine room special air-conditioning is switched from the refrigerant pump refrigeration mode to a mixed refrigeration mode, and meanwhile, the condenser 10 is switched from the serial state to a parallel state. The specific operation sequence is as follows: the third solenoid valve 107 is first switched on, the second solenoid valve 106 is switched on, the first solenoid valve 105 is switched off, the fifth solenoid valve 5 is switched off, the compressor 8 is then switched on, and the sixth solenoid valve 9 is switched off. Otherwise, the special air conditioner for the air cooling machine room keeps the refrigeration mode of the refrigerant pump unchanged.

Assuming that the current air-cooling machine room special air conditioner operation mode is a mixed refrigeration mode, corresponding to the condenser 10 being in a parallel state, when the system detects that Ti-Td is larger than or equal to A and the temperature state does not change obviously within a certain time, the air-cooling machine room special air conditioner operation mode is switched from the mixed refrigeration mode to a refrigerant pump refrigeration mode, and meanwhile, the condenser 10 is switched from the parallel state to a series state. The specific operation sequence is as follows: the sixth solenoid valve 9 is first switched on, the compressor 8 is then switched off, the fifth solenoid valve 5 is then switched on, the first solenoid valve 105 is then switched on, the second solenoid valve 106 is then switched off and finally the third solenoid valve 107 is switched off.

When the system detects that Ti-Td is less than B and the temperature state is not obviously changed within a certain time, the operation mode of the special air conditioner for the air cooling machine room is switched from the hybrid refrigeration mode to the compression refrigeration mode, and meanwhile, the parallel connection state of the condensers 10 is kept unchanged. The specific operation sequence is as follows: the fourth electromagnetic valve 3 is turned on, and then the refrigerant pump 2 is turned off. Otherwise, the special air conditioner for the air cooling machine room keeps the mixed refrigeration mode unchanged.

Assuming that the current air-cooling machine room special air conditioner operation mode is a compression refrigeration mode, corresponding to the condenser 10 is in a parallel state, when the system detects that B is not less than Ti-Td and A is not more than A and the temperature state does not change obviously within a certain time, the air-cooling machine room special air conditioner operation mode is switched from the compression refrigeration mode to a mixed refrigeration mode, and meanwhile, the condenser 10 keeps the parallel state unchanged. The specific operation sequence is as follows: the refrigerant pump 2 is turned on and then the fourth electromagnetic valve 3 is turned off. Otherwise, the special air conditioner for the air-cooled machine room keeps the compression refrigeration mode unchanged.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A condenser, comprising at least one condensing unit, each of said condensing units comprising a first and a second split-flow assembly,

wherein, two ends of the first shunting and collecting component can be connected with an air inlet main pipe and a liquid outlet main pipe, two ends of the second shunting and collecting component can be connected with the air inlet main pipe and the liquid outlet main pipe,

the first flow dividing and collecting assembly and the second flow dividing and collecting assembly can be switched between a serial state of being connected between the air inlet main pipe and the liquid outlet main pipe in series and a parallel state of being connected between the air inlet main pipe and the liquid outlet main pipe in parallel.

2. The condenser of claim 1, wherein the first flow splitting and collecting assembly comprises a first flow splitting tube and a first collecting tube, wherein the second flow splitting and collecting assembly comprises a second flow splitting tube and a second collecting tube,

the first collecting pipe and the second collecting pipe are connected through a communicating pipeline, the first collecting pipe and the second collecting pipe are both connected with the air inlet main pipe, and the first collecting pipe and the second collecting pipe are both connected with the liquid outlet main pipe.

3. The condenser according to claim 2, wherein a first solenoid valve is disposed between the first collecting pipe and the second collecting pipe, a second solenoid valve is disposed at an inlet of the second collecting pipe, and a third solenoid valve is disposed at an outlet of the first collecting pipe.

4. An air conditioner special for an air cooling machine room, which is characterized by comprising a liquid storage tank, a refrigerant pump, a throttling device, an indoor air conditioner tail end, a gas-liquid separator, a compressor and a condenser according to any one of claims 1 to 3,

wherein the outlet of the liquid storage tank is connected with the inlet of the refrigerant pump, the refrigerant pump is provided with a refrigerant pump bypass pipeline, the outlet of the refrigerant pump is connected with the inlet of the throttling device, the throttling device is provided with a throttling device bypass pipeline,

the outlet of the throttling device is connected with the tail end of the indoor air conditioner, the tail end of the indoor air conditioner is connected with the inlet of the gas-liquid separator, the outlet of the gas-liquid separator is connected with the inlet of the compressor, the compressor is provided with a compressor bypass pipeline,

the outlet of the compressor is connected with the air inlet main pipe, the liquid outlet main pipe is connected with the inlet of the liquid storage tank,

the refrigerant pump bypass pipeline is provided with a fourth electromagnetic valve, the throttling device bypass pipeline is provided with a fifth electromagnetic valve, and the compressor bypass pipeline is provided with a sixth electromagnetic valve.

5. The air conditioner dedicated to the air-cooled room according to claim 4, wherein the air conditioner dedicated to the air-cooled room is configured to be operable in a compression cooling mode,

wherein, in the compression refrigeration mode, the compressor is started, the refrigerant pump is closed, the fourth solenoid valve is turned on, the fifth solenoid valve and the sixth solenoid valve are turned off, and the condenser is in the parallel state, wherein the first solenoid valve is turned off, and the second solenoid valve and the third solenoid valve are turned on.

6. The air-cooled machine room dedicated air conditioner according to claim 4, wherein the air-cooled machine room dedicated air conditioner is configured to be operable in a hybrid cooling mode,

wherein, in the hybrid cooling mode, the compressor is started, the refrigerant pump is started, the fourth solenoid valve, the fifth solenoid valve, and the sixth solenoid valve are turned off, and the condenser is in the parallel state, wherein the first solenoid valve is turned off, and the second solenoid valve and the third solenoid valve are turned on.

7. The air conditioner special for the air cooling room according to claim 4, wherein the air conditioner special for the air cooling room is configured to be operated in a cooling mode of a refrigerant pump,

wherein, in the refrigerant pump cooling mode, the compressor is off, the refrigerant pump is on, the fourth solenoid valve is off, the fifth solenoid valve and the sixth solenoid valve are on, and the condenser is in the series state, wherein the first solenoid valve is on, and the second solenoid valve and the third solenoid valve are off.

8. A control method for the special air conditioner for the air cooling machine room of any one of claims 4 to 7, characterized by comprising the following steps:

and controlling the refrigerant pump, the throttling device and the compressor to start and stop, so that the air-cooled machine room special air conditioner is switched among a compression refrigeration mode, a mixed refrigeration mode and a refrigerant pump refrigeration mode, and the condenser is correspondingly controlled to be switched between a parallel state and a series state.

9. The control method according to claim 8, characterized by further comprising:

starting a compressor, closing a refrigerant pump, switching on a fourth electromagnetic valve, and switching off a fifth electromagnetic valve and a sixth electromagnetic valve to enable the special air conditioner for the air cooling machine room to be in the compression refrigeration mode, and simultaneously switching off a first electromagnetic valve, and switching on a second electromagnetic valve and a third electromagnetic valve to enable the condenser to be in a parallel state;

starting a compressor, starting a refrigerant pump, turning off a fourth electromagnetic valve, a fifth electromagnetic valve and a sixth electromagnetic valve to enable the special air conditioner for the air cooling machine room to be in the mixed refrigeration mode, and simultaneously turning off a first electromagnetic valve, and turning on a second electromagnetic valve and a third electromagnetic valve to enable the condenser to be in a parallel state;

and closing the compressor, starting the refrigerant pump, switching off the fourth electromagnetic valve, and switching on the fifth electromagnetic valve and the sixth electromagnetic valve to enable the special air conditioner for the air cooling machine room to be in a refrigeration mode of the refrigerant pump, and simultaneously switching on the first electromagnetic valve, and switching off the second electromagnetic valve and the third electromagnetic valve to enable the condenser to be in a series connection state.

10. The control method according to claim 8, characterized by further comprising:

when the air conditioner special for the air cooling machine room is switched from the compression refrigeration mode or the mixed refrigeration mode to the refrigeration mode of the refrigerant pump, the compressor is closed firstly, and then the condenser is adjusted to be switched from the parallel state to the serial state;

when the air conditioner special for the air cooling machine room is switched from the refrigerant pump refrigeration mode to the compression refrigeration mode or the mixed refrigeration mode, the condenser is firstly adjusted to be switched from the serial connection state to the parallel connection state, and then the compressor is started;

when the condenser is switched from the parallel state to the series state, the first electromagnetic valve is firstly switched on, then the second electromagnetic valve is switched off, and finally the third electromagnetic valve is switched off;

when the condenser is switched from the series connection state to the parallel connection state, the third electromagnetic valve is firstly switched on, then the second electromagnetic valve is switched on, and finally the first electromagnetic valve is switched off.

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