CN217004750U - Machine room air conditioner - Google Patents
Machine room air conditioner Download PDFInfo
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- CN217004750U CN217004750U CN202220773757.4U CN202220773757U CN217004750U CN 217004750 U CN217004750 U CN 217004750U CN 202220773757 U CN202220773757 U CN 202220773757U CN 217004750 U CN217004750 U CN 217004750U
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Abstract
The embodiment of the utility model provides a machine room air conditioner, which comprises a refrigeration module and a cold supply module, wherein in the refrigeration module, the cold production capacity of the refrigeration module is adjusted by controlling the running speed of a compressor; in the cooling module, a natural cooling condenser is arranged between an inlet and an outlet of a condensation channel of the heat exchanger, and the cooling capacity proportion of refrigerant flowing into the natural cooling condenser and the condensation channel of the heat exchanger is adjusted by controlling the running speed of the natural cooling condenser, so that the cooling capacity of the natural cooling condenser and the cooling capacity of the condensation channel of the heat exchanger can be reasonably distributed, and the cooling effect of the machine room air conditioner is improved.
Description
Technical Field
The utility model relates to the technical field of air conditioners, in particular to a machine room air conditioner.
Background
In recent years, with the rapid development of data rooms, especially the use of a large number of high-heating-density devices, the heat productivity of cabinet servers in the data rooms is large, and cooling is required all the year round.
However, in the current composite refrigeration system, when performing mechanical refrigeration, all refrigerants are used for mechanical refrigeration, and when performing natural refrigeration, all refrigerants are used for natural refrigeration, but sometimes all refrigerants are not needed for mechanical refrigeration or natural refrigeration, that is, the distribution of refrigerants is not reasonable, that is, the refrigeration effect of the existing composite refrigeration system is poor.
How to improve the refrigeration effect of the machine room air conditioner with the composite refrigeration system is a problem to be solved urgently by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model provides a machine room air conditioner and an operation control method and an operation control device thereof, which are used for improving the refrigeration effect of the machine room air conditioner.
In a first aspect, an embodiment of the present invention provides a machine room air conditioner, including: a refrigeration module and a cooling module;
the refrigeration module is composed of a compressor, a condenser, a refrigeration valve and an evaporation channel of a heat exchanger which are sequentially connected, wherein a high-pressure exhaust port of the compressor is connected with an inlet of the condenser, and a low-pressure air suction port of the compressor is connected with an outlet of the evaporation channel; the refrigerating capacity of the refrigerating module is adjusted by controlling the running speed of the compressor;
the cooling module comprises a natural cooling condenser, a refrigerant pump, a machine room evaporator, a condensing channel of a heat exchanger and a liquid storage device which are sequentially connected to form a loop, wherein an outlet of the machine room evaporator is connected with an inlet of the condensing channel, an inlet of the machine room evaporator is connected with an outlet of the refrigerant pump, and the natural cooling condenser is arranged between the inlet of the condensing channel and the outlet of the condensing channel; and adjusting the cooling capacity ratio of the refrigerants flowing into the natural condenser and the condensation channel by controlling the running speed of the natural condenser so as to adjust the cooling capacity of the cooling module.
In a possible implementation manner, the system further comprises a first temperature sensor arranged at the wind side inlet of the natural cold condenser and a second temperature sensor arranged at the wind side inlet of the machine room evaporator;
the first temperature sensor is used for acquiring outdoor temperature, and the second temperature sensor is used for acquiring indoor temperature.
In a possible implementation manner, the number of the machine room evaporators is multiple, and the multiple machine room evaporators are arranged in parallel.
In one possible implementation, the refrigeration module further comprises a first one-way valve and a second one-way valve;
the first one-way valve is connected to a pipeline between the condensation channel and the liquid reservoir;
the second one-way valve is connected to a pipeline between the natural cold condenser and the liquid storage device.
In a possible implementation manner, the device further comprises a three-way distribution valve;
the three-way distribution valve is connected with the machine room evaporator, the condensation channel and the natural cooling condenser, wherein the opening degree of the three-way distribution valve can be adjusted.
In a second aspect, an embodiment of the present invention further provides an operation control method for a machine room air conditioner, where the method is applied to any one of the machine room air conditioners in the first aspect, and the method includes:
acquiring indoor temperature and outdoor temperature;
controlling the operation speed of the compressor according to the indoor temperature and the outdoor temperature to adjust the cold production amount of the refrigeration module, and controlling the operation speed of the natural cold condenser to adjust the cold supply amount ratio of the refrigerant flowing into the natural cold condenser and the condensation channel to adjust the cold supply amount of the cold supply module.
In a possible implementation manner, if it is determined that the difference between the indoor temperature and the outdoor temperature is greater than or equal to a first preset value, then:
and controlling the refrigerant pump to operate and controlling the natural cooling condenser to operate at full speed so as to enable the cooling capacity proportion to be a set proportion, and operating the machine room air conditioner in a natural cooling refrigeration mode.
In a possible implementation manner, if it is determined that the difference between the indoor temperature and the outdoor temperature is smaller than a first preset value, then:
and controlling the refrigerant pump to operate and controlling the compressor to operate at full speed so as to enable the machine room air conditioner to operate in a mechanical refrigeration mode.
In a possible implementation manner, if it is determined that the outdoor temperature is decreased, whether a difference between the indoor temperature and the outdoor temperature is greater than or equal to a second preset value is determined, if yes, then:
and controlling the natural condenser to operate, and reducing the operating speed of the compressor to increase the cooling capacity proportion, wherein the machine room air conditioner operates in a composite refrigeration mode.
In one possible implementation, the reducing the operating speed of the compressor includes:
and reducing the running speed of the compressor according to the ratio relation of the difference value of the indoor temperature, the outdoor temperature and the second preset value and the difference value of the first preset value and the second preset value.
In a possible implementation manner, if it is determined that the outdoor temperature is decreased, whether a difference between the indoor temperature and the outdoor temperature is greater than or equal to a first preset value is determined, if yes, then:
and controlling the natural cooling condenser to run at full speed, controlling the compressor to be closed so as to enable the cooling capacity proportion to be a set proportion, and operating the machine room air conditioner in a natural cooling refrigeration mode.
In a third aspect, an embodiment of the present invention further provides an operation control device for a machine room air conditioner, which is applied to the machine room air conditioner according to any one of the first aspect, and the device includes:
an acquisition unit for acquiring an indoor temperature and an outdoor temperature;
and the control unit is used for controlling the running speed of the compressor according to the indoor temperature and the outdoor temperature so as to adjust the cold production capacity of the refrigeration module, controlling the running speed of the natural cold condenser and adjusting the cooling capacity proportion of the refrigerant flowing into the natural cold condenser and the condensation channel so as to adjust the cooling capacity of the cooling module.
In a possible implementation manner, if it is determined that the difference between the indoor temperature and the outdoor temperature is greater than or equal to a first preset value, then:
the control unit is specifically configured to:
and controlling the refrigerant pump to operate and controlling the natural cooling condenser to operate at full speed so as to enable the cooling capacity proportion to be a set proportion, and operating the machine room air conditioner in a natural cooling refrigeration mode.
In a possible implementation manner, if it is determined that the difference between the indoor temperature and the outdoor temperature is smaller than a first preset value, then:
the control unit is specifically configured to:
and controlling the refrigerant pump to operate and controlling the compressor to operate at full speed so as to enable the machine room air conditioner to operate in a mechanical refrigeration mode.
In a possible implementation manner, if it is determined that the outdoor temperature is decreased, it is determined whether a difference between the indoor temperature and the outdoor temperature is greater than or equal to a second preset value, and if so, the control unit is specifically configured to:
and controlling the natural condenser to operate, and reducing the operating speed of the compressor to increase the cooling capacity proportion, wherein the machine room air conditioner operates in a composite refrigeration mode.
In a possible implementation manner, the control unit is specifically configured to:
and reducing the running speed of the compressor according to the ratio relation of the difference value of the indoor temperature, the outdoor temperature and the second preset value and the difference value of the first preset value and the second preset value.
In a possible implementation manner, if it is determined that the outdoor temperature is decreased, it is determined whether a difference between the indoor temperature and the outdoor temperature is greater than or equal to a first preset value, and if so, the control unit is specifically configured to:
and controlling the natural cooling condenser to run at full speed, and controlling the compressor to be closed so as to enable the cooling capacity proportion to be a set proportion, and operating the machine room air conditioner in a natural cooling refrigeration mode.
The embodiment of the utility model has the following beneficial effects:
an embodiment of the present invention provides a machine room air conditioner, including: a refrigeration module and a cooling module; the refrigeration module is composed of a compressor, a condenser, a refrigeration valve and an evaporation channel of a heat exchanger which are connected in sequence, a high-pressure exhaust port of the compressor is connected with an inlet of the condenser, and a low-pressure air suction port of the compressor is connected with an outlet of the evaporation channel; the refrigerating capacity of the refrigerating module is adjusted by controlling the running speed of the compressor; the cooling module comprises a natural cooling condenser, a refrigerant pump, a machine room evaporator, a condensing channel of a heat exchanger and a liquid storage device which are sequentially connected to form a loop, wherein an outlet of the machine room evaporator is connected with an inlet of the condensing channel, an inlet of the machine room evaporator is connected with an outlet of the refrigerant pump, and the natural cooling condenser is arranged between the inlet of the condensing channel and an outlet of the condensing channel; the cooling capacity of the cooling module is adjusted by controlling the running speed of the natural condenser and adjusting the cooling capacity proportion of the refrigerant flowing into the natural condenser and the condensing channel. Because the cooling capacity proportion of the refrigerant flowing into the natural condenser and the condensing channel can be adjusted by controlling the running speed of the natural condenser, the cooling capacity of the condensing channel of the natural condenser and the condensing channel of the heat exchanger can be reasonably distributed, and the refrigerating effect of the machine room air conditioner is improved.
Drawings
In order to more clearly explain the technical solutions of the present application, the drawings required for the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a machine room air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another air conditioner in a machine room according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another air conditioner in a machine room according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another air conditioner in a machine room according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of a method for controlling operation of a machine room air conditioner according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an apparatus for controlling operation of an air conditioner of a machine room according to an embodiment of the present invention.
Icon:
1-a refrigeration module; 2-a cooling module; 101-refrigerant pump; 102-a machine room evaporator; 103-a heat exchanger; 1031-an evaporation channel; 1032-condensation channels; 104-a reservoir; 105-a compressor; 106-a condenser; 107-a refrigeration valve; 201-natural cold condenser; 301-a first temperature sensor; 302-a second temperature sensor; 401-a first one-way valve; 402-a second one-way valve; 501-three-way distribution valve.
Detailed Description
In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of protection of the present application.
The data center machine room needs to be refrigerated all the year round, so that the machine room is maintained at a stable temperature all the year round, and stable operation of equipment in the machine room is guaranteed. In winter, a natural cold source serving as a natural resource can be applied to an air conditioning system so as to reduce energy consumption of the air conditioning system, and the natural cold resource can be used for providing cold for the air conditioner through a natural cold condenser, so that a composite system is mostly adopted in a data center at present, and the composite system runs two modes of mechanical refrigeration or natural cold refrigeration when the air conditioner runs.
An embodiment of the present invention provides a machine room air conditioner, as shown in fig. 1, including: a refrigeration module 1 and a cooling module 2;
the refrigeration module 1 is composed of a compressor 105, a condenser 106, a refrigeration valve 107 and an evaporation passage 1031 of a heat exchanger 103 which are connected in sequence, wherein a high-pressure air outlet of the compressor 105 is connected with an inlet of the condenser 106, and a low-pressure air inlet of the compressor 105 is connected with an outlet of the evaporation passage 1031; the refrigerating capacity of the refrigerating module is adjusted by controlling the running speed of the compressor 105;
the cooling supply module 2 comprises a natural cooling condenser 201, a loop formed by a refrigerant pump 101, a machine room evaporator 102, a condensation channel 1032 of a heat exchanger 103 and a liquid accumulator 104 which are sequentially connected, wherein an outlet of the machine room evaporator 102 is connected with an inlet of the condensation channel 1032, an inlet of the machine room evaporator 102 is connected with an outlet of the refrigerant pump 101, and the natural cooling condenser 201 is arranged between an inlet of the condensation channel 1032 and an outlet of the condensation channel 1032; by controlling the operation speed of the natural cold condenser 201, the cooling capacity ratio of the refrigerant flowing into the natural cold condenser 201 and the condensation passage 1032 is adjusted to adjust the cooling capacity of the cooling module 2.
The machine room air conditioner provided by the embodiment of the utility model comprises a refrigeration module 1 and a cold supply module 2, wherein in the refrigeration module 1, the cold production capacity of the refrigeration module 1 is adjusted by controlling the running speed of a compressor 105; in the cooling module 2, the natural cooling condenser 201 is arranged between the inlet and the outlet of the condensation channel 1032 of the heat exchanger 103, and the cooling capacity ratio of the refrigerant flowing into the natural cooling condenser 201 and the condensation channel 1032 of the heat exchanger 103 is adjusted by controlling the operation speed of the natural cooling condenser 201, so that the cooling capacities of the natural cooling condenser 201 and the condensation channel 1032 of the heat exchanger 103 can be reasonably distributed, and the cooling effect of the machine room air conditioner is further improved.
In specific implementation, the air conditioner in the machine room provided by the embodiment of the utility model further comprises a first temperature sensor 301 arranged at the wind-side inlet of the natural cooling condenser 201 and a second temperature sensor 302 arranged at the wind-side inlet of the machine room evaporator 102;
the first temperature sensor 301 is used for acquiring the outdoor temperature Tout at the wind side inlet of the natural cooling condenser 201, and the second temperature sensor 302 is used for acquiring the indoor temperature Tin at the wind side inlet of the machine room evaporator 102.
The condenser 106 provided by the embodiment of the utility model can be a condensation water tower or a coil condenser and the like; the heat exchanger 103 can be in various forms such as a shell-and-tube heat exchanger or a plate heat exchanger; the natural cold condenser 201 utilizes natural cold resources and may be implemented in a variety of ways, including but not limited to: cooling water towers, fan coils, water sprays, and the like.
The proportional distribution of the cooling capacity of the refrigerant in the condensing channel 1032 of the heat exchanger 103 and the natural cooling condenser 201 provided by the embodiment of the present invention can be realized in different ways:
in a first way, as shown in fig. 1, the heat exchanger 103 and the natural cooling condenser 201 are arranged in the same horizontal position, and the refrigerant is distributed by itself by the condensation pressure:
for example, in the case where the natural cold condenser 201 is operated at full speed and the compressor 105 is not operated, the room air conditioner is operated in the natural cooling mode, the gaseous refrigerant evaporated by the room evaporator 102 has a condensing pressure of approximately 1:0 at the condensing passage 1032 of the natural cold condenser 201 and the heat exchanger 103 due to an extremely low condensing pressure at the position of the natural cold condenser 201, and the refrigerant flows to the natural cold condenser 201;
for another example, in the case where the natural condenser 201 is not operated and the compressor 105 is operated at full speed, the machine room air conditioner operates in the mechanical cooling mode, the gaseous refrigerant evaporated by the machine room evaporator 102 has a condensing pressure at the position of the natural condenser 201 that is very high, and at this time, the condensing pressure at the positions of the condensing channels 1032 of the natural condenser 201 and the heat exchanger 103 is approximately 0:1, and the refrigerant flows to the condensing channels 1032 of the heat exchanger 103;
for another example, in the case where the natural condenser 201 and the compressor 105 are simultaneously operated (neither is at full speed), and the machine room air conditioner is operated in the composite cooling mode, the gaseous refrigerant evaporated by the machine room evaporator 102 automatically distributes the flow direction of the refrigerant according to the ratio of the condensing pressures at the positions of the condensing passages 1032 of the natural condenser 201 and the heat exchanger 103, and if the ratio of the condensing pressures at a certain time is 1:2, the refrigerant automatically flows to the refrigerant at the positions of the condensing passages 1032 of the natural condenser 201 and the heat exchanger 103 according to the ratio of the condensing pressures at a certain time in a cooling capacity ratio of 2: 1.
It should be noted that, since the natural cooling condenser 201 needs to dissipate heat when condensing the refrigerant, so that the gaseous refrigerant is liquefied, and the pressure is reduced, the magnitude of the condensing pressure at the position of the natural cooling condenser 201 can be changed by controlling the operation speed of the natural cooling condenser 201.
The machine room air conditioner provided by the embodiment of the utility model adjusts the cooling capacity proportion of the refrigerant flowing into the natural condenser 201 and the condensing channel 1032 of the heat exchanger 103 by controlling the running speed of the natural condenser 201, so that the cooling capacities of the natural condenser 201 and the condensing channel 1032 of the heat exchanger 103 can be reasonably distributed, and the refrigerating effect of the machine room air conditioner is further improved.
Second, as shown in fig. 2, if the heat exchanger 103 and the natural cooling condenser 201 are disposed at different horizontal positions, the refrigerant flow direction can be distributed by disposing corresponding three-way distribution valves:
the three-way distribution valve 501 is connected with the machine room evaporator 102, the heat exchanger 103 and the natural cooling condenser 201, wherein the opening degree of the three-way distribution valve 501 can be adjusted.
For example, in the case where the natural cooling condenser 201 is operated at full speed and the compressor 105 is not operated, when the machine room air conditioner is operated in the natural cooling mode, the path connected to the machine room evaporator 102 and the path connected to the natural cooling condenser 201 in the three-way distribution valve 501 are adjusted to be completely opened, and the refrigerant flows to the natural cooling condenser 201;
as another example, in the case where the natural cooling condenser 201 is not operated and the compressor 105 is operated at full speed, and the machine room air conditioner is operated in the mechanical cooling mode, the path connected to the machine room evaporator 102 and the path connected to the condensation channel 1032 of the heat exchanger 103 in the three-way distribution valve 501 are adjusted to be completely opened, and the refrigerant flows to the condensation channel 1032 of the heat exchanger 103;
for another example, in the case where the natural cooling condenser 201 and the compressor 105 are simultaneously operated (neither is at full speed), when the machine room air conditioner operates in the hybrid cooling mode, the passage connected to the machine room evaporator 102 in the three-way distribution valve 501 is adjusted to be fully open, the passage connected to the natural cooling condenser 201 and the passage connected to the condensation passage 1032 of the heat exchanger 103 in the three-way distribution valve 501 are adjusted to be partially open, and the refrigerant flows to the natural cooling condenser 201 and the condensation passage 1032 of the heat exchanger 103, respectively, according to the opening degree of the three-way distribution valve 501.
Specifically, the degree of opening adjustment of the three-way distribution valve 501 may be adjusted according to the difference Tin-Tout between the indoor temperature and the outdoor temperature. If the difference value Tin-Tout between the indoor temperature and the outdoor temperature is determined to be larger than or equal to a first preset value Ta, controlling the passage between the three-way distribution valve 501 and the machine room evaporator 102 and the passage between the three-way distribution valve 501 and the natural condenser 201 to be completely opened; and if the difference value Tin-Tout between the indoor temperature and the outdoor temperature is determined to be less than the first preset value Ta, controlling the passage between the three-way distribution valve 501 and the machine room evaporator 102 and the passage between the three-way distribution valve 501 and the condensation channel 1032 of the heat exchanger 103 to be completely opened.
After the passage between the three-way distribution valve 501 and the machine room evaporator 102 and the passage between the three-way distribution valve 501 and the condensing channel 1032 of the heat exchanger 103 are completely opened, if the outdoor temperature Tout is reduced, three passages of the three-way distribution valve 501 are all controlled to be opened, the opening degree is determined according to the ambient temperature, if the difference value Tin-Tout between the indoor temperature and the outdoor temperature is greater than or equal to a second preset value Tb and smaller than a first preset value Ta, the opening degree of the three-way distribution valve 501 is controlled according to the ratio of (Tin-Tout-Tb)/(Ta-Tb), for example, if the ratio of (Tin-Tout-Tb)/(Ta-Tb) is 2/5, the ratio of the opening degree of the passage between the three-way distribution valve 501 and the natural condenser 201 and the opening degree of the passage between the three-way distribution valve 501 and the condensing channel 1032 of the heat exchanger 103 is 2/3, if the ratio of (Tin-Tout-Tb)/(Ta-Tb) is 3/5, the ratio of the opening degrees of the passage between the three-way distribution valve 501 and the natural cooling condenser 201 and the passage between the three-way distribution valve 501 and the condensation passage 1032 of the heat exchanger 103 is controlled to be 3/2, and if the ratio of (Tin-Tout-Tb)/(Ta-Tb) is 4/5, the ratio of the opening degrees of the passage between the three-way distribution valve 501 and the natural cooling condenser 201 and the passage between the three-way distribution valve 501 and the condensation passage 1032 of the heat exchanger 103 is controlled to be 4/1.
In an embodiment, as shown in fig. 3, the machine room air conditioner provided in the embodiment of the present invention may include a plurality of machine room evaporators 102, 2 machine room evaporators 102 are taken as an example for illustration, the plurality of machine room evaporators 102 are arranged in parallel, and by arranging the plurality of machine room evaporators 102 in parallel, the cooling capacity can be increased, and the operating efficiency of the machine room air conditioner can be improved.
In an embodiment, the air conditioner in the machine room according to the embodiment of the present invention may further include a check valve, as shown in fig. 4, the refrigeration module 2 further includes a first check valve 401 and a second check valve 402, the first check valve 401 is connected to a pipeline between the condensation channel 1032 of the heat exchanger 103 and the accumulator 104, and the second check valve 402 is connected to a pipeline between the natural cooling condenser 201 and the accumulator 104.
The one-way valve provided by the embodiment of the utility model has a one-way circulation function, and can ensure that the refrigerant flowing out of the condensation channel 1032 of the heat exchanger 103 or the natural condenser 201 can smoothly flow into the liquid accumulator 104, so that the air conditioner can stably run.
Based on the same concept of the utility model, an embodiment of the present invention further provides an operation control method for a machine room air conditioner, which is applied to any one of the machine room air conditioners provided in the above technical solutions, as shown in fig. 5, the method includes:
s501, acquiring indoor temperature and outdoor temperature;
s502, controlling the running speed of the compressor according to the indoor temperature and the outdoor temperature to adjust the cold production capacity of the refrigeration module, controlling the running speed of the natural condenser, and adjusting the proportion of the cooling capacity of the refrigerant flowing into the natural condenser and the condensation channel to adjust the cooling capacity of the cooling module.
According to the operation control method of the machine room air conditioner provided by the embodiment of the utility model, the operation speed of the compressor is controlled according to the indoor temperature and the outdoor temperature so as to adjust the cold production quantity of the refrigeration module, control the operation speed of the natural condenser and adjust the proportion of the cooling quantity of the refrigerant flowing into the natural condenser and the condensation channel, so that the cooling quantity of the natural condenser and the condensation channel of the heat exchanger can be reasonably distributed, and the refrigeration effect of the machine room air conditioner is further improved.
In specific implementation, when the machine room air conditioner is started, firstly, the indoor temperature Tin and the outdoor temperature Tout are obtained, then, the difference value Tin-Tout between the indoor temperature and the outdoor temperature is judged, and different running modes of the machine room air conditioner are controlled according to the difference value.
Specifically, if it is determined that the difference Tin-Tout between the indoor temperature and the outdoor temperature is greater than or equal to a first preset value Ta, then: the operation of the refrigerant pump 101 and the full-speed operation of the natural cooling condenser 201 are controlled so that the cooling capacity ratio is a set ratio, for example, 1:0, and the machine room air conditioner operates in a natural cooling and refrigerating mode, wherein the first preset value Ta can be set according to actual conditions.
If the difference value Tin-Tout between the indoor temperature and the outdoor temperature is smaller than the first preset value Ta, the method comprises the following steps: controlling the refrigerant pump 101 to run, and controlling the compressor 105 to run at full speed, so that the machine room air conditioner runs in a mechanical refrigeration mode; after the air conditioner in the machine room operates, if the outdoor temperature Tout is determined to be reduced, whether the difference value Tin-Tout between the indoor temperature and the outdoor temperature is larger than or equal to a second preset value Tb is judged, wherein the second preset value Tb is smaller than a first preset value Ta, if so, then: the natural condenser 201 is controlled to run, in the running moment, the natural condenser 201 can be controlled to run at full speed to supply cold quickly, the running speed of the natural condenser 201 is reduced according to indoor temperature and outdoor temperature after a period of time is preset, the running speed of the natural condenser 201 can also be increased gradually according to the indoor temperature and the outdoor temperature, the running speed of the compressor 105 is reduced, so that the proportion of the quantity of supplied cold is increased, the air conditioner in the machine room runs a composite refrigeration mode, the proportion of the quantity of supplied cold can be adjusted according to the difference value of the indoor temperature and the outdoor temperature, and the distribution of the flow direction of a refrigerant is more reasonable, so that the natural condenser and the compressor can be utilized in a balanced mode to the maximum extent in the refrigeration mode, and the energy consumption is reduced while the quantity of supplied cold is ensured.
In addition, if the reduction range of the outdoor temperature is large until the difference value Tin-Tout between the indoor temperature and the outdoor temperature is greater than or equal to the first preset value Ta, the natural cooling condenser 201 is controlled to run at full speed, and the compressor 105 is controlled to be closed, so that the cooling capacity ratio is a set ratio, for example, 1:0, and the machine room air conditioner runs in a natural cooling refrigeration mode.
It should be noted that, when the operation speed of the compressor 105 is reduced in the embodiment of the present invention, the operation speed of the compressor is reduced according to the ratio relationship between the difference Tin-Tout-Tb between the indoor temperature Tin, the outdoor temperature Tout and the second preset value Tb and the difference Ta-Tb between the first preset value Ta and the second preset value Tb, specifically, according to the ratio of (Tin-Tout-Tb)/(Ta-Tb), the ratio of the refrigerant concentrations flowing through the free cooling condenser 201 and the heat exchanger 103 is controlled, so as to increase the output ratio of the free cooling condenser 201 relative to the compressor 105, that is, to decrease the output ratio of the compressor 105 relative to the free cooling condenser 201. For example, if the ratio of (Tin-Tout-Tb)/(Ta-Tb) is 1/5, the output ratio of the natural cooling condenser 201 is controlled to 20%, the fan rotation speed of the natural cooling condenser 201 is adjusted to 20% of the full speed, and the output ratio of the compressor is reduced from the original full speed operation to 80%.
According to the operation control method of the machine room air conditioner provided by the embodiment of the utility model, the operation speeds of the natural condenser and the compressor are controlled according to the indoor temperature and the outdoor temperature, and the cooling capacity proportion of the refrigerant flowing into the condensation channels of the natural condenser and the heat exchanger is adjusted, so that the refrigeration mode of the machine room air conditioner can be continuously switched among the mechanical refrigeration mode, the composite refrigeration mode and the natural refrigeration mode, the cooling capacities of the condensation channels of the natural condenser and the heat exchanger can be reasonably distributed, and the refrigeration effect of the machine room air conditioner is further improved.
Based on the same utility model concept, the embodiment of the utility model also provides an operation control device of a machine room air conditioner, and the implementation of the device can refer to the implementation of the method, and repeated parts are not described again. As shown in fig. 6, the apparatus includes:
an acquisition unit 601 configured to acquire an indoor temperature and an outdoor temperature;
and a control unit 602 for controlling the operation speed of the compressor to adjust the cooling capacity of the cooling module according to the indoor temperature and the outdoor temperature, and controlling the operation speed of the natural cold condenser to adjust the cooling capacity ratio of the refrigerant flowing into the natural cold condenser and the condensing passage to adjust the cooling capacity of the cooling module.
Optionally, if it is determined that the difference Tin-Tout between the indoor temperature and the outdoor temperature is greater than or equal to the first preset value Ta, then:
the control unit 602 is specifically configured to:
the refrigerant pump 101 is controlled to operate, and the natural cooling condenser 201 is controlled to operate at full speed, so that the cooling capacity ratio is a set ratio, for example, 1:0, and the machine room air conditioner operates in a natural cooling and refrigerating mode.
Optionally, if it is determined that the difference Tin-Tout between the indoor temperature and the outdoor temperature is smaller than the first preset value Ta, then:
the control unit 602 is specifically configured to:
the refrigerant pump 101 is controlled to operate, and the compressor 105 is controlled to operate at full speed, so that the machine room air conditioner operates in a mechanical refrigeration mode.
Optionally, if it is determined that the outdoor temperature is decreased, it is determined whether a difference Tin-Tout between the indoor temperature and the outdoor temperature is greater than or equal to a second preset value Tb, if so, the control unit 602 is specifically configured to:
the natural cooling condenser 201 is controlled to operate, the operation speed of the compressor 105 is reduced, so that the cooling capacity proportion is increased, and the machine room air conditioner operates in a composite cooling mode.
Optionally, the control unit 602 is specifically configured to:
and reducing the operation speed of the compressor 105 according to the ratio of the difference Tin-Tout-Tb between the indoor temperature, the outdoor temperature and the second preset value to the difference Ta-Tb between the first preset value and the second preset value.
Optionally, if it is determined that the outdoor temperature is decreased, determining whether a difference Tin-Tout between the indoor temperature and the outdoor temperature is greater than or equal to a first preset value Ta, if yes:
the control unit 602 is specifically configured to:
the natural cooling condenser 201 is controlled to run at full speed, the compressor 105 is controlled to be closed, so that the cooling capacity ratio is set to be a set ratio, for example, 1:0, and the machine room air conditioner runs in a natural cooling mode.
The embodiment of the utility model provides a machine room air conditioner and an operation control method and an operation control device thereof, wherein the machine room air conditioner comprises the following components: a refrigeration module and a cooling module; the refrigeration module is composed of a compressor, a condenser, a refrigeration valve and an evaporation channel of a heat exchanger which are sequentially connected, a high-pressure exhaust port of the compressor is connected with an inlet of the condenser, and a low-pressure air suction port of the compressor is connected with an outlet of the evaporation channel; the refrigerating capacity of the refrigerating module is adjusted by controlling the running speed of the compressor; the cooling module comprises a natural cooling condenser, a refrigerant pump, a machine room evaporator, a condensing channel of a heat exchanger and a liquid storage device which are sequentially connected to form a loop, wherein an outlet of the machine room evaporator is connected with an inlet of the condensing channel, an inlet of the machine room evaporator is connected with an outlet of the refrigerant pump, and the natural cooling condenser is arranged between the inlet of the condensing channel and an outlet of the condensing channel; the cooling capacity of the cooling module is adjusted by controlling the running speed of the natural condenser and adjusting the cooling capacity proportion of the refrigerant flowing into the natural condenser and the condensing channel. Because the cooling capacity proportion of the refrigerant flowing into the natural condenser and the condensing channel can be adjusted by controlling the running speed of the natural condenser, the cooling capacity of the condensing channel of the natural condenser and the condensing channel of the heat exchanger can be reasonably distributed, and the refrigerating effect of the machine room air conditioner is improved.
Various modifications and alterations of this application may be made by those skilled in the art without departing from the spirit and scope of this application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (5)
1. A machine room air conditioner, comprising: a refrigeration module and a cooling module;
the refrigeration module is composed of a compressor, a condenser, a refrigeration valve and an evaporation channel of a heat exchanger which are sequentially connected, wherein a high-pressure exhaust port of the compressor is connected with an inlet of the condenser, and a low-pressure air suction port of the compressor is connected with an outlet of the evaporation channel; the refrigerating capacity of the refrigerating module is adjusted by controlling the running speed of the compressor;
the cooling supply module comprises a natural cooling condenser and a loop consisting of a refrigerant pump, a machine room evaporator, a condensation channel of a heat exchanger and a liquid storage device which are sequentially connected, wherein an outlet of the machine room evaporator is connected with an inlet of the condensation channel, an inlet of the machine room evaporator is connected with an outlet of the refrigerant pump, and the natural cooling condenser is arranged between the inlet of the condensation channel and the outlet of the condensation channel; and adjusting the cooling capacity proportion of the refrigerant flowing into the natural condenser and the condensation channel by controlling the running speed of the natural condenser so as to adjust the cooling capacity of the cooling module.
2. The air conditioner according to claim 1, further comprising a first temperature sensor provided at a wind-side inlet of said natural cold condenser and a second temperature sensor provided at a wind-side inlet of said machine room evaporator;
the first temperature sensor is used for acquiring outdoor temperature, and the second temperature sensor is used for acquiring indoor temperature.
3. The air conditioner according to claim 1, wherein the machine room evaporator is plural, and plural machine room evaporators are arranged in parallel.
4. The air conditioner of claim 1, wherein the refrigeration module further comprises a first check valve and a second check valve;
the first one-way valve is connected to a pipeline between the condensation channel and the liquid reservoir;
the second one-way valve is connected to a pipeline between the natural cold condenser and the liquid storage device.
5. The air conditioner of claim 1, further comprising a three-way distribution valve;
the three-way distribution valve is connected with the machine room evaporator, the condensation channel and the natural cooling condenser, wherein the opening degree of the three-way distribution valve can be adjusted.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220773757.4U CN217004750U (en) | 2022-04-01 | 2022-04-01 | Machine room air conditioner |
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| CN202220773757.4U CN217004750U (en) | 2022-04-01 | 2022-04-01 | Machine room air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106852086A (en) * | 2017-03-24 | 2017-06-13 | 广东申菱环境系统股份有限公司 | Double-stage tandem type liquid gas binary channels natural cooling data center heat dissipation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106852086A (en) * | 2017-03-24 | 2017-06-13 | 广东申菱环境系统股份有限公司 | Double-stage tandem type liquid gas binary channels natural cooling data center heat dissipation system |
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