A computer room air conditioner and its operation control method and device

Abstract

This invention provides a data center air conditioner and its operation control method and device. The data center air conditioner includes a refrigeration module and a cooling supply module. In the refrigeration module, the cooling capacity is adjusted by controlling the operating speed of the compressor. In the cooling supply module, a natural cooling condenser is installed between the inlet and outlet of the condensing channel of the heat exchanger. By controlling the operating speed of the natural cooling condenser, the cooling capacity ratio of the refrigerant flowing into the condensing channel of the natural cooling condenser and the heat exchanger is adjusted, thereby rationally distributing the cooling capacity of the condensing channel of the natural cooling condenser and the heat exchanger, and thus improving the cooling effect of the data center air conditioner.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a computer room air conditioner and its operation control method and device. Background Technology

[0002] In recent years, with the rapid development of data centers, especially the large-scale use of high heat density equipment, the rack servers in data centers generate a lot of heat and require cooling throughout the year. In order to reduce energy consumption, large air conditioning systems in data centers now adopt composite cooling systems, which usually include mechanical cooling and natural cooling. Mechanical cooling uses the cold source provided by the compressor for cooling, while natural cooling uses the natural cold source for cooling.

[0003] However, in current combined refrigeration systems, all the refrigerant is used for mechanical refrigeration during mechanical refrigeration and all the refrigerant is used for natural refrigeration during natural refrigeration. But sometimes it is not necessary to use all the refrigerant for mechanical refrigeration or natural refrigeration, that is, the distribution of refrigerant is not reasonable. In other words, the refrigeration effect of existing combined refrigeration systems is poor.

[0004] Improving the cooling effect of computer room air conditioners with composite refrigeration systems is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] This invention provides a computer room air conditioner and its operation control method and device, which are used to improve the cooling effect of the computer room air conditioner.

[0006] In a first aspect, embodiments of the present invention provide a computer room air conditioner, comprising: a refrigeration module and a cooling supply module;

[0007] The refrigeration module consists of a compressor, a condenser, a refrigeration valve, and an evaporation channel of a heat exchanger connected in sequence. The high-pressure exhaust port of the compressor is connected to the inlet of the condenser, and the low-pressure suction port of the compressor is connected to the outlet of the evaporation channel. The cooling capacity of the refrigeration module is adjusted by controlling the operating speed of the compressor.

[0008] The cooling module includes a natural cooling condenser and a circuit consisting of a refrigerant pump, a machine room evaporator, a heat exchanger condensing channel, and a liquid receiver connected in sequence. The outlet of the machine room evaporator is connected to the inlet of the condensing channel, and the inlet of the machine room evaporator is connected to the outlet of the refrigerant pump. The natural cooling condenser is installed between the inlet and outlet of the condensing channel. By controlling the operating speed of the natural cooling condenser, the cooling capacity ratio of the refrigerant flowing into the natural cooling condenser and the condensing channel is adjusted to regulate the cooling capacity of the cooling module.

[0009] In one possible implementation, a first temperature sensor is provided at the air-side inlet of the natural cooling condenser and a second temperature sensor is provided at the air-side inlet of the machine room evaporator.

[0010] The first temperature sensor is used to acquire the outdoor temperature, and the second temperature sensor is used to acquire the indoor temperature.

[0011] In one possible implementation, there are multiple evaporators in the computer room, and the multiple evaporators are connected in parallel.

[0012] In one possible implementation, the refrigeration module further includes a first check valve and a second check valve;

[0013] The first check valve is connected to the pipeline between the condensation channel and the liquid reservoir;

[0014] The second check valve is connected to the pipeline between the natural cooling condenser and the liquid receiver.

[0015] One possible implementation also includes a three-way distribution valve;

[0016] The three-way distribution valve is connected to the evaporator in the machine room, the condensation channel, and the natural cooling condenser, wherein the opening of the three-way distribution valve is adjustable.

[0017] Secondly, embodiments of the present invention also provide an operation control method for a computer room air conditioner, applied to any of the computer room air conditioners described in the first aspect, the method comprising:

[0018] Get indoor and outdoor temperatures;

[0019] Based on the indoor and outdoor temperatures, the operating speed of the compressor is controlled to adjust the cooling capacity of the refrigeration module, and the operating speed of the natural cooling condenser is controlled to adjust the ratio of refrigerant supply to the natural cooling condenser and the condensation channel, thereby adjusting the cooling capacity of the cooling module.

[0020] In one possible implementation, 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:

[0021] The refrigerant pump is controlled to operate, and the natural cooling condenser is controlled to operate at full speed so that the cooling capacity ratio is set, and the computer room air conditioner operates in natural cooling mode.

[0022] In one possible implementation, if it is determined that the difference between the indoor temperature and the outdoor temperature is less than a first preset value, then:

[0023] Control the operation of the refrigerant pump and control the compressor to run at full speed so that the computer room air conditioner operates in mechanical refrigeration mode.

[0024] In one possible implementation, if it is determined that the outdoor temperature has decreased, it is determined whether the difference between the indoor temperature and the outdoor temperature is greater than or equal to a second preset value; if so, then:

[0025] The operation of the natural cooling condenser is controlled, and the operating speed of the compressor is reduced to increase the cooling capacity ratio, so that the computer room air conditioner operates in a composite cooling mode.

[0026] In one possible implementation, reducing the operating speed of the compressor includes:

[0027] The compressor's operating speed is reduced based on the ratio of the difference between the indoor temperature, outdoor temperature, and the second preset value to the difference between the first preset value and the second preset value.

[0028] In one possible implementation, if it is determined that the outdoor temperature has decreased, it is determined whether the difference between the indoor temperature and the outdoor temperature is greater than or equal to a first preset value; if so, then:

[0029] The air conditioner is controlled to run at full speed and the compressor is controlled to shut down, so that the cooling capacity ratio is set and the computer room air conditioner operates in natural cooling mode.

[0030] Thirdly, embodiments of the present invention also provide an operation control device for a computer room air conditioner, applied to a computer room air conditioner as described in any of the first aspects, the device comprising:

[0031] The acquisition unit is used to acquire indoor and outdoor temperatures;

[0032] The control unit is used to control the operating speed of the compressor according to the indoor temperature and the outdoor temperature to adjust the cooling capacity of the refrigeration module, and to control the operating speed of the natural cooling condenser, and to adjust the ratio of the cooling capacity of the refrigerant flowing into the natural cooling condenser and the condensation channel to adjust the cooling capacity of the cooling module.

[0033] In one possible implementation, 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:

[0034] The control unit is specifically used for:

[0035] The refrigerant pump is controlled to operate, and the natural cooling condenser is controlled to operate at full speed so that the cooling capacity ratio is set, and the computer room air conditioner operates in natural cooling mode.

[0036] In one possible implementation, if it is determined that the difference between the indoor temperature and the outdoor temperature is less than a first preset value, then:

[0037] The control unit is specifically used for:

[0038] Control the operation of the refrigerant pump and control the compressor to run at full speed so that the computer room air conditioner operates in mechanical refrigeration mode.

[0039] In one possible implementation, if it is determined that the outdoor temperature has decreased, the control unit determines whether the difference between the indoor temperature and the outdoor temperature is greater than or equal to a second preset value. If so, the control unit is specifically used for:

[0040] The operation of the natural cooling condenser is controlled, and the operating speed of the compressor is reduced to increase the cooling capacity ratio, so that the computer room air conditioner operates in a composite cooling mode.

[0041] In one possible implementation, the control unit is specifically used for:

[0042] The compressor's operating speed is reduced based on the ratio of the difference between the indoor temperature, outdoor temperature, and the second preset value to the difference between the first preset value and the second preset value.

[0043] In one possible implementation, if it is determined that the outdoor temperature has decreased, it is determined whether the difference between the indoor temperature and the outdoor temperature is greater than or equal to a first preset value. If so, the control unit is specifically used for:

[0044] The air conditioner is controlled to run at full speed and the compressor is controlled to shut down, so that the cooling capacity ratio is set and the computer room air conditioner operates in natural cooling mode.

[0045] The beneficial effects of the embodiments of the present invention are as follows:

[0046] This invention provides a data center air conditioner and its operation control method and device. The data center air conditioner includes a refrigeration module and a cooling supply module. The refrigeration module consists of an evaporation channel of a compressor, a condenser, a refrigeration valve, and a heat exchanger connected in sequence. The high-pressure exhaust port of the compressor is connected to the inlet of the condenser, and the low-pressure suction port of the compressor is connected to the outlet of the evaporation channel. The cooling capacity of the refrigeration module is adjusted by controlling the operating speed of the compressor. The cooling supply module includes a natural cooling condenser and a circuit consisting of a refrigerant pump, a data center evaporator, a condensation channel of the heat exchanger, and a liquid receiver connected in sequence. The outlet of the data center evaporator is connected to the inlet of the condensation channel, and the inlet of the data center evaporator is connected to the outlet of the refrigerant pump. A natural cooling condenser is installed between the inlet and outlet of the condensation channel. The cooling capacity of the cooling supply module is adjusted by controlling the operating speed of the natural cooling condenser and regulating the ratio of refrigerant flowing into the natural cooling condenser and the condensation channel. By controlling the operating speed of the natural cooling condenser and adjusting the proportion of refrigerant flowing into the natural cooling condenser and condensing channel, the cooling capacity of the natural cooling condenser and the condensing channel of the heat exchanger can be rationally allocated, thereby improving the cooling effect of the computer room air conditioner. Attached Figure Description

[0047] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of the structure of a computer room air conditioner provided in an embodiment of the present invention;

[0049] Figure 2 This is a schematic diagram of another computer room air conditioner provided in an embodiment of the present invention;

[0050] Figure 3 This is a schematic diagram of another computer room air conditioner provided in an embodiment of the present invention;

[0051] Figure 4 This is a schematic diagram of another computer room air conditioner provided in an embodiment of the present invention;

[0052] Figure 5 A flowchart illustrating a method for controlling the operation of a computer room air conditioner, provided in an embodiment of the present invention;

[0053] Figure 6 This is a schematic diagram of the structure of a computer room air conditioning operation control device provided in an embodiment of the present invention.

[0054] icon:

[0055] 1-Refrigeration module; 2-Cooling supply module; 101-Refrigerant pump; 102-Evaporator in computer room; 103-Heat exchanger; 1031-Evaporation channel; 1032-Condensation channel; 104-Liquid receiver; 105-Compressor; 106-Condenser; 107-Refrigeration valve; 201-Natural cooling condenser; 301-First temperature sensor; 302-Second temperature sensor; 401-First check valve; 402-Second check valve; 501-Three-way distribution valve. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art are within the scope of protection of this application.

[0057] Data center server rooms require year-round cooling to maintain a stable temperature throughout the year, ensuring the stable operation of equipment. In winter, natural cold sources, as a natural resource, can be utilized in air conditioning systems to reduce energy consumption. Natural cooling condensers can be used to provide cooling capacity for air conditioning. Therefore, most data centers currently employ hybrid systems, which operate in both mechanical and natural cooling modes during air conditioning operation.

[0058] This invention provides a data center air conditioner, such as... Figure 1 As shown, it includes: a refrigeration module 1 and a cooling supply module 2;

[0059] The refrigeration module 1 consists of a compressor 105, a condenser 106, a refrigeration valve 107, and an evaporation channel 1031 of a heat exchanger 103 connected in sequence. The high-pressure exhaust port of the compressor 105 is connected to the inlet of the condenser 106, and the low-pressure suction port of the compressor 105 is connected to the outlet of the evaporation channel 1031. The cooling capacity of the refrigeration module is adjusted by controlling the operating speed of the compressor 105.

[0060] The cooling module 2 includes a natural cooling condenser 201 and a circuit consisting of a refrigerant pump 101, a machine room evaporator 102, a heat exchanger 103, a condensing channel 1032, and a liquid receiver 104 connected in sequence. The outlet of the machine room evaporator 102 is connected to the inlet of the condensing channel 1032, and the inlet of the machine room evaporator 102 is connected to the outlet of the refrigerant pump 101. The natural cooling condenser 201 is installed between the inlet and outlet of the condensing channel 1032. By controlling the operating speed of the natural cooling condenser 201, the cooling capacity ratio of the refrigerant flowing into the natural cooling condenser 201 and the condensing channel 1032 is adjusted to regulate the cooling capacity of the cooling module 2.

[0061] The air conditioner for the computer room provided in this embodiment of the invention includes a refrigeration module 1 and a cooling supply module 2. In the refrigeration module 1, the cooling capacity of the refrigeration module 1 is adjusted by controlling the operating speed of the compressor 105. In the cooling supply module 2, a natural cooling condenser 201 is provided between the inlet and outlet of the condensation channel 1032 of the heat exchanger 103. By controlling the operating speed of the natural cooling condenser 201, 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, thereby rationally distributing the cooling capacity of the natural cooling condenser 201 and the condensation channel 1032 of the heat exchanger 103, thereby improving the cooling effect of the air conditioner for the computer room.

[0062] In a specific implementation, the computer room air conditioner provided in this embodiment of the invention also includes a first temperature sensor 301 disposed at the air-side inlet of the natural cooling condenser 201 and a second temperature sensor 302 disposed at the air-side inlet of the computer room evaporator 102.

[0063] The first temperature sensor 301 is used to acquire the outdoor temperature Tout at the air-side inlet of the natural cooling condenser 201, and the second temperature sensor 302 is used to acquire the indoor temperature Tin at the air-side inlet of the machine room evaporator 102.

[0064] The condenser 106 provided in this embodiment of the invention can be in various forms such as a condensing tower or a coil condenser; the heat exchanger 103 can be in various forms such as a shell and tube heat exchanger or a plate heat exchanger; the natural cooling condenser 201 utilizes natural cooling resources and can be implemented in various ways, including but not limited to: cooling towers, fan coil units, water spray, etc.

[0065] The refrigerant's cooling capacity distribution in the condensation channel 1032 of the heat exchanger 103 and the natural cooling condenser 201, as provided in this embodiment of the invention, can be achieved in different ways:

[0066] Method 1, such as Figure 1 As shown, the heat exchanger 103 and the natural cooling condenser 201 are positioned at the same horizontal level, and the refrigerant is self-distributed by the condensing pressure.

[0067] For example, when the natural cooling condenser 201 is running at full speed and the compressor 105 is not running, the computer room air conditioner is running in natural cooling mode. The gaseous refrigerant after evaporation in the computer room evaporator 102 has an extremely low condensing pressure at the location of the natural cooling condenser 201. At this time, the condensing pressure at the location of the condensing channel 1032 of the natural cooling condenser 201 and the heat exchanger 103 is approximately 1:0, and all the refrigerant flows to the natural cooling condenser 201.

[0068] For example, when the natural cooling condenser 201 is not running, but the compressor 105 is running at full speed, the computer room air conditioner is running in mechanical cooling mode. Due to the extremely high condensing pressure at the location of the natural cooling condenser 201, the condensing pressure at the location of the condensing channel 1032 of the heat exchanger 103 is approximately 0:1 after the gaseous refrigerant evaporates through the computer room evaporator 102. All the refrigerant flows to the condensing channel 1032 of the heat exchanger 103.

[0069] For example, when the natural cooling condenser 201 and compressor 105 are running simultaneously (neither at full speed), the computer room air conditioner operates in a combined cooling mode. The gaseous refrigerant after evaporation by the computer room evaporator 102 is automatically distributed according to the condensing pressure ratio at the condensing channel 1032 of the natural cooling condenser 201 and heat exchanger 103. If the condensing pressure ratio is 1:2 at a certain moment, the cooling capacity ratio of the refrigerant automatically flowing to the condensing channel 1032 of the natural cooling condenser 201 and heat exchanger 103 is 2:1.

[0070] It is worth noting that since the natural cooling condenser 201 needs to dissipate heat when condensing the refrigerant, the gaseous refrigerant liquefies, which in turn leads to a decrease in pressure. Therefore, by controlling the operating speed of the natural cooling condenser 201, the condensing pressure at the location of the natural cooling condenser 201 can be changed.

[0071] The computer room air conditioner provided in this embodiment of the invention controls the operating speed of the natural cooling condenser 201 and adjusts the cooling capacity ratio of the refrigerant flowing into the condensing channel 1032 of the natural cooling condenser 201 and the heat exchanger 103, thereby rationally distributing the cooling capacity of the natural cooling condenser 201 and the condensing channel 1032 of the heat exchanger 103, and thus improving the cooling effect of the computer room air conditioner.

[0072] Method 2, such as Figure 2 As shown, if the heat exchanger 103 and the natural cooling condenser 201 are installed at different horizontal positions, the refrigerant flow can be distributed by setting corresponding three-way distribution valves:

[0073] The three-way distribution valve 501 is connected to the evaporator 102, heat exchanger 103 and natural cooling condenser 201 in the machine room. The opening degree of the three-way distribution valve 501 is adjustable.

[0074] For example, when the natural cooling condenser 201 is running at full speed and the compressor 105 is not running, the computer room air conditioner runs in natural cooling mode. The passage in the three-way distribution valve 501 connected to the computer room evaporator 102 and the passage connected to the natural cooling condenser 201 are fully opened, and all the refrigerant flows to the natural cooling condenser 201.

[0075] For example, when the natural cooling condenser 201 is not running, but the compressor 105 is running at full speed, the computer room air conditioner is running in mechanical cooling mode. The passage in the three-way distribution valve 501 that connects to the computer room evaporator 102 and the passage that connects to the condensing passage 1032 of the heat exchanger 103 are fully opened, and all the refrigerant flows to the condensing passage 1032 of the heat exchanger 103.

[0076] For example, when the natural cooling condenser 201 and the compressor 105 are running simultaneously (neither at full speed), the computer room air conditioner operates in a combined cooling mode. The passage in the three-way distribution valve 501 connected to the computer room evaporator 102 is fully opened, and the passage in the three-way distribution valve 501 connected to the natural cooling condenser 201 and the passage connected to the condensing channel 1032 of the heat exchanger 103 are partially opened. The refrigerant flows to the natural cooling condenser 201 and the condensing channel 1032 of the heat exchanger 103 respectively according to the opening degree of the three-way distribution valve 501.

[0077] Specifically, the opening degree of the three-way distribution valve 501 can be adjusted according to the temperature difference between the indoor and outdoor temperatures, Tin-Tout. If the temperature difference Tin-Tout is determined to be greater than or equal to the first preset value Ta, the passage between the three-way distribution valve 501 and the evaporator 102 in the machine room, and the passage between the three-way distribution valve 501 and the natural cooling condenser 201 are fully opened. If the temperature difference Tin-Tout is determined to be less than the first preset value Ta, the passage between the three-way distribution valve 501 and the evaporator 102 in the machine room, and the passage between the three-way distribution valve 501 and the condensation channel 1032 of the heat exchanger 103 are fully opened.

[0078] After the passages between the three-way distribution valve 501 and the evaporator 102 in the machine room, and between the three-way distribution valve 501 and the condensing passage 1032 of the heat exchanger 103 are fully opened, if the outdoor temperature Tout decreases, then all three passages of the three-way distribution valve 501 will be opened. The opening degree should be determined according to the ambient temperature. If the difference between the indoor and outdoor temperatures, Tin-Tout, is greater than or equal to the second preset value Tb and less than the first preset value Ta, then the opening degree of the three-way distribution valve 501 will be controlled according to the ratio (Tin-Tout-Tb) / (Ta-Tb). For example, if the ratio (Tin-Tout-Tb) / (Ta-Tb) is 2 / 5, then the three-way distribution valve 501 will be controlled to open with the natural cooling condenser 201. The ratio of the opening degree of the passage between the three-way distribution valve 501 and the condensing passage 1032 of the heat exchanger 103 is 2 / 3. If the ratio of (Tin-Tout-Tb) / (Ta-Tb) is 3 / 5, then the ratio of the opening degree of the passage between the three-way distribution valve 501 and the natural cooling condenser 201 and the condensing passage 1032 of the heat exchanger 103 is 3 / 2. If the ratio of (Tin-Tout-Tb) / (Ta-Tb) is 4 / 5, then the ratio of the opening degree of the passage between the three-way distribution valve 501 and the natural cooling condenser 201 and the condensing passage 1032 of the heat exchanger 103 is 4 / 1.

[0079] In one embodiment, such as Figure 3 As shown in the figure, the computer room air conditioner provided in this embodiment of the invention may include multiple computer room evaporators 102. The figure illustrates two computer room evaporators 102 as an example. Multiple computer room evaporators 102 are connected in parallel. By setting multiple computer room evaporators 102 in parallel, the cooling capacity can be increased and the operating efficiency of the computer room air conditioner can be improved.

[0080] In one embodiment, the computer room air conditioner provided by the present invention may further include a one-way valve, such as... Figure 4 As shown, the refrigeration module 2 also includes a first one-way valve 401 and a second one-way valve 402. The first one-way valve 401 is connected to the pipeline between the condensing channel 1032 of the heat exchanger 103 and the liquid receiver 104, and the second one-way valve 402 is connected to the pipeline between the natural cooling condenser 201 and the liquid receiver 104.

[0081] The one-way valve provided in this embodiment of the invention has a one-way flow function, which can ensure that the refrigerant flowing out from the condensing channel 1032 of the heat exchanger 103 or the natural cooling condenser 201 flows smoothly into the liquid receiver 104, thereby enabling the air conditioner to operate stably.

[0082] Based on the same inventive concept, embodiments of the present invention also provide an operation control method for a data center air conditioner, applicable to any of the data center air conditioners provided in the above technical solutions, such as... Figure 5 As shown, the method includes:

[0083] S501, Obtain indoor and outdoor temperatures;

[0084] S502. Based on the indoor and outdoor temperatures, control the compressor's operating speed to adjust the cooling capacity of the refrigeration module, and control the operating speed of the natural cooling condenser to adjust the ratio of refrigerant supply in the natural cooling condenser and condensation channel to adjust the cooling capacity of the cooling module.

[0085] In the operation control method of the computer room air conditioner provided in this embodiment of the invention, the operating speed of the compressor is controlled according to the indoor temperature and the outdoor temperature to adjust the cooling capacity of the refrigeration module, the operating speed of the natural cooling condenser is controlled, and the cooling capacity ratio of the refrigerant flowing into the natural cooling condenser and the condensation channel is adjusted, so that the cooling capacity of the natural cooling condenser and the condensation channel of the heat exchanger can be reasonably allocated, thereby improving the cooling effect of the computer room air conditioner.

[0086] In practice, when the computer room air conditioner starts up, it first obtains the indoor temperature Tin and the outdoor temperature Tout, then determines the difference between the indoor and outdoor temperatures, Tin-Tout, and controls the computer room air conditioner to operate in different modes based on this difference.

[0087] Specifically, if the difference between indoor and outdoor temperatures, Tin-Tout, is greater than or equal to the first preset value Ta, then: control the refrigerant pump 101 to run and control the natural cooling condenser 201 to run at full speed so that the cooling capacity ratio is a set ratio, for example, 1:0, and the computer room air conditioner runs in natural cooling mode. The value of the first preset value Ta can be set according to the actual situation.

[0088] If it is determined that the temperature difference between indoor and outdoor temperatures, Tin-Tout, is less than the first preset value, Ta, then: control the refrigerant pump 101 to run and control the compressor 105 to run at full speed so that the computer room air conditioner operates in mechanical cooling mode; after the computer room air conditioner starts running, if it is determined that the outdoor temperature, Tout, decreases, then determine whether the temperature difference between indoor and outdoor temperatures, Tin-Tout, is greater than or equal to the second preset value, Tb, where the second preset value, Tb, is less than the first preset value, Ta. If so, then: control the natural cooling condenser 201 to run. At the moment of operation, the natural cooling condenser 201 can be controlled to run at full speed first. The system provides rapid cooling. After a preset period, the operating speed of the natural cooling condenser 201 is reduced based on the indoor and outdoor temperatures. Alternatively, the operating speed of the natural cooling condenser 201 can be gradually increased based on the indoor and outdoor temperatures, while the operating speed of the compressor 105 is reduced. This increases the proportion of cooling capacity. The computer room air conditioner operates in a composite cooling mode. Since the proportion of cooling capacity can be adjusted according to the difference between indoor and outdoor temperatures, the refrigerant flow distribution is more reasonable. Therefore, this cooling mode can maximize the balanced use of the natural cooling condenser and the compressor, reducing energy consumption while ensuring cooling capacity.

[0089] In addition, if the outdoor temperature drops significantly until the difference between the indoor and outdoor temperatures, Tin-Tout, 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 shut down, so that the cooling capacity ratio is set, for example, 1:0, so that the computer room air conditioner runs in natural cooling mode.

[0090] It is worth noting that, in this embodiment of the invention, when reducing the operating speed of compressor 105, the compressor operating speed is reduced based on the ratio of the difference between indoor temperature Tin, outdoor temperature Tou, and the second preset value Tb (Tin-Tout-Tb) to the difference between the first preset value Ta and the second preset value Tb (Ta-Tb). Specifically, based on the ratio of (Tin-Tout-Tb) / (Ta-Tb), the proportion of refrigerant concentration flowing through the natural cooling condenser 201 and the heat exchanger 103 is controlled, thereby increasing the output ratio of the natural cooling condenser 201 relative to compressor 105, which in turn reduces the output ratio of compressor 105 relative to natural cooling condenser 201. For example, if the ratio of (Tin-Tout-Tb) / (Ta-Tb) is 1 / 5, then the output ratio of natural cooling condenser 201 is controlled to 20%, and the fan speed of natural cooling condenser 201 is adjusted to 20% of full speed, thus reducing the compressor output ratio from full speed to 80%.

[0091] The operation control method for a computer room air conditioner provided in this invention controls the operating speed of the natural cooling condenser and compressor based on the indoor and outdoor temperatures, and adjusts the cooling capacity ratio of the refrigerant flowing into the condensing channels of the natural cooling condenser and heat exchanger. This allows the computer room air conditioner to continuously switch between mechanical cooling mode, combined cooling mode, and natural cooling mode without interruption, and can rationally allocate the cooling capacity of the condensing channels of the natural cooling condenser and heat exchanger, thereby improving the cooling effect of the computer room air conditioner.

[0092] Based on the same inventive concept, embodiments of the present invention also provide an operation control device for a computer room air conditioner. The implementation of this device can refer to the implementation of the above-described method; repeated details will not be elaborated further. For example... Figure 6 As shown, the device includes:

[0093] Acquisition unit 601 is used to acquire indoor temperature and outdoor temperature;

[0094] The control unit 602 is used to control the operating speed of the compressor according to the indoor temperature and the outdoor temperature to adjust the cooling capacity of the refrigeration module, and to control the operating speed of the natural cooling condenser to adjust the ratio of refrigerant supply in the natural cooling condenser and the condensation channel to adjust the cooling capacity of the cooling module.

[0095] Optionally, if the difference between indoor and outdoor temperatures, Tin-Tout, is determined to be greater than or equal to a first preset value, Ta, then:

[0096] Control unit 602 is specifically used for:

[0097] Control the operation of refrigerant pump 101 and control the natural cooling condenser 201 to run at full speed so that the cooling capacity ratio is set, for example, 1:0, and the computer room air conditioner runs in natural cooling mode.

[0098] Optionally, if it is determined that the difference between the indoor temperature and the outdoor temperature, Tin-Tout, is less than the first preset value Ta, then:

[0099] Control unit 602 is specifically used for:

[0100] Control the operation of refrigerant pump 101 and compressor 105 to run at full speed so that the computer room air conditioner operates in mechanical refrigeration mode.

[0101] Optionally, if it is determined that the outdoor temperature has decreased, the control unit 602 determines whether the difference between the indoor and outdoor temperatures, Tin-Tout, is greater than or equal to a second preset value, Tb. If so, the control unit 602 is specifically used for:

[0102] Control the operation of the natural cooling condenser 201 and reduce the operating speed of the compressor 105 to increase the proportion of cooling capacity, so that the computer room air conditioner operates in a composite cooling mode.

[0103] Optionally, the control unit 602 is specifically used for:

[0104] Based on the ratio of the difference between indoor temperature, outdoor temperature, and the second preset value (Tin-Tout-Tb) to the difference between the first preset value and the second preset value (Ta-Tb), the operating speed of compressor 105 is reduced.

[0105] Optionally, if it is determined that the outdoor temperature has decreased, determine whether the difference between the indoor and outdoor temperatures, Tin-Tout, is greater than or equal to a first preset value, Ta. If so, then:

[0106] Control unit 602 is specifically used for:

[0107] Control the natural cooling condenser 201 to run at full speed and control the compressor 105 to shut down so that the cooling capacity ratio is set, for example, 1:0, and the computer room air conditioner runs in natural cooling mode.

[0108] This invention provides a data center air conditioner and its operation control method and device. The data center air conditioner includes a refrigeration module and a cooling supply module. The refrigeration module consists of an evaporation channel of a compressor, a condenser, a refrigeration valve, and a heat exchanger connected in sequence. The high-pressure exhaust port of the compressor is connected to the inlet of the condenser, and the low-pressure suction port of the compressor is connected to the outlet of the evaporation channel. The cooling capacity of the refrigeration module is adjusted by controlling the operating speed of the compressor. The cooling supply module includes a natural cooling condenser and a circuit consisting of a refrigerant pump, a data center evaporator, a condensation channel of the heat exchanger, and a liquid receiver connected in sequence. The outlet of the data center evaporator is connected to the inlet of the condensation channel, and the inlet of the data center evaporator is connected to the outlet of the refrigerant pump. A natural cooling condenser is installed between the inlet and outlet of the condensation channel. The cooling capacity of the cooling supply module is adjusted by controlling the operating speed of the natural cooling condenser and regulating the ratio of refrigerant flowing into the natural cooling condenser and the condensation channel. By controlling the operating speed of the natural cooling condenser and adjusting the proportion of refrigerant flowing into the natural cooling condenser and condensing channel, the cooling capacity of the natural cooling condenser and the condensing channel of the heat exchanger can be rationally allocated, thereby improving the cooling effect of the computer room air conditioner.

[0109] Those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A computer room air conditioner, characterized in that, include: Refrigeration module and cooling supply module; The refrigeration module consists of a compressor, a condenser, a refrigeration valve, and an evaporation channel of a heat exchanger connected in sequence. The high-pressure exhaust port of the compressor is connected to the inlet of the condenser, and the low-pressure suction port of the compressor is connected to the outlet of the evaporation channel. The cooling capacity of the refrigeration module is adjusted by controlling the operating speed of the compressor. The cooling module includes a natural cooling condenser and a circuit consisting of a refrigerant pump, a machine room evaporator, a heat exchanger condensing channel, and a liquid receiver connected in sequence. The outlet of the machine room evaporator is connected to the inlet of the condensing channel, and the inlet of the machine room evaporator is connected to the outlet of the refrigerant pump. The natural cooling condenser is installed between the inlet and outlet of the condensing channel. By controlling the operating speed of the natural cooling condenser, the cooling capacity ratio of the refrigerant flowing into the natural cooling condenser and the condensing channel is adjusted to regulate the cooling capacity of the cooling module. The computer room air conditioner operates in the following manner: Get indoor and outdoor temperatures; Based on the indoor temperature and the outdoor temperature, the operating speed of the compressor is controlled to adjust the cooling capacity of the refrigeration module, and the operating speed of the natural cooling condenser is controlled to adjust the ratio of the cooling capacity of the refrigerant flowing into the natural cooling condenser and the condensation channel to adjust the cooling capacity of the cooling module. If it is determined that the outdoor temperature has decreased, determine whether the difference between the indoor temperature and the outdoor temperature is greater than or equal to a second preset value. If so, then: The operation of the natural cooling condenser is controlled, and the operating speed of the compressor is reduced according to the ratio of the difference between the indoor temperature, the outdoor temperature and the second preset value to the difference between the first preset value and the second preset value, so as to increase the cooling capacity ratio, and the computer room air conditioner operates in a composite cooling mode.

2. The air conditioner as described in claim 1, characterized in that, It also includes a first temperature sensor installed at the air-side inlet of the natural cooling condenser and a second temperature sensor installed at the air-side inlet of the machine room evaporator; The first temperature sensor is used to acquire the outdoor temperature, and the second temperature sensor is used to acquire the indoor temperature.

3. The air conditioner as described in claim 1, characterized in that, The computer room evaporator is a plurality of units, and the plurality of computer room evaporators are connected in parallel.

4. The air conditioner as described in claim 1, characterized in that, The refrigeration module also includes a first one-way valve and a second one-way valve; The first check valve is connected to the pipeline between the condensation channel and the liquid reservoir; The second check valve is connected to the pipeline between the natural cooling condenser and the liquid receiver.

5. The air conditioner as described in claim 1, characterized in that, It also includes a three-way distribution valve; The three-way distribution valve is connected to the evaporator in the machine room, the condensation channel, and the natural cooling condenser, wherein the opening of the three-way distribution valve is adjustable.

6. The air conditioner as described in claim 1, characterized in that, 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 refrigerant pump is controlled to operate, and the natural cooling condenser is controlled to operate at full speed so that the cooling capacity ratio is set, and the computer room air conditioner operates in natural cooling mode.

7. The air conditioner as described in claim 1, characterized in that, If it is determined that the difference between the indoor temperature and the outdoor temperature is less than a first preset value, then: Control the operation of the refrigerant pump and control the compressor to run at full speed so that the computer room air conditioner operates in mechanical refrigeration mode.

8. The air conditioner as described in claim 1 or 7, characterized in that, If it is determined that the outdoor temperature has decreased, determine whether the difference between the indoor temperature and the outdoor temperature is greater than or equal to a first preset value. If so, then: The air conditioner is controlled to run at full speed and the compressor is controlled to shut down, so that the cooling capacity ratio is set and the computer room air conditioner operates in natural cooling mode.

9. An operation control device for a computer room air conditioner, characterized in that, Applied to the computer room air conditioner as described in any one of claims 1-8, the device comprises: The acquisition unit is used to acquire indoor and outdoor temperatures; The control unit is used to control the operating speed of the compressor according to the indoor temperature and the outdoor temperature to adjust the cooling capacity of the refrigeration module, and to control the operating speed of the natural cooling condenser, and to adjust the ratio of the cooling capacity of the refrigerant flowing into the natural cooling condenser and the condensation channel to adjust the cooling capacity of the cooling module.

10. The apparatus as claimed in claim 9, characterized in that, 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 used for: The refrigerant pump is controlled to operate, and the natural cooling condenser is controlled to operate at full speed so that the cooling capacity ratio is set, and the computer room air conditioner operates in natural cooling mode.

11. The apparatus as claimed in claim 9, characterized in that, If it is determined that the difference between the indoor temperature and the outdoor temperature is less than a first preset value, then: The control unit is specifically used for: Control the operation of the refrigerant pump and control the compressor to run at full speed so that the computer room air conditioner operates in mechanical refrigeration mode.

12. The apparatus as claimed in claim 11, characterized in that, If it is determined that the outdoor temperature has decreased, the control unit determines whether the difference between the indoor temperature and the outdoor temperature is greater than or equal to a second preset value. If so, the control unit is specifically used for: The operation of the natural cooling condenser is controlled, and the operating speed of the compressor is reduced to increase the cooling capacity ratio, so that the computer room air conditioner operates in a composite cooling mode.

13. The apparatus as claimed in claim 12, characterized in that, The control unit is specifically used for: The compressor's operating speed is reduced based on the ratio of the difference between the indoor temperature, outdoor temperature, and the second preset value to the difference between the first preset value and the second preset value.

14. The apparatus as claimed in claim 11, characterized in that, If it is determined that the outdoor temperature has decreased, the control unit determines whether the difference between the indoor temperature and the outdoor temperature is greater than or equal to a first preset value. If so, the control unit is specifically used for: The air conditioner is controlled to run at full speed and the compressor is controlled to shut down, so that the cooling capacity ratio is set and the computer room air conditioner operates in natural cooling mode.

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