Cold storage device for communication base station and control method thereof

Abstract

The invention relates to the technical field of cold storage devices, provides a cold storage device for a communication base station and a control method of the cold storage device, and provides the cold storage device which utilizes a phase change material to absorb energy and refrigerate when the electricity price is low, and starts an evaporator to release the cold energy absorbed by the phase change material when the temperature in a cabinet is detected to exceed the requirement; the number of the phase change modules and the power of the compressor are adaptively configured according to the heating value in the cabinet, so that the cold storage capacity is controlled, the cold storage capacity can be stored when the electricity price is low, the cold storage capacity is released when the electricity price is high, and more efficient energy utilization and lower electric charge expenditure are achieved.

Description

Technical Field

[0001] The present disclosure relates to the technical field related to cold storage devices, and in particular, to a cold storage device for a communication base station and a control method thereof. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art.

[0003] With the rapid development of 5G communication technology and the continuous expansion of the scale of data center information infrastructure construction, the demand for electricity and energy has increased significantly. As an important part of the communication network, the energy storage power supply system of base stations and data centers has become a core link to ensure the stability and reliability of communication services. However, this type of backup energy storage system will generate a lot of heat during operation, causing the temperature inside the system cabinet to rise. If the heat cannot be dissipated in a timely and effective manner, it will not only affect the stability and service life of the cabinet, but may also cause the equipment to operate in a less efficient manner or even fail.

[0004] The inventors found in their research that, at present, outdoor power cabinets for communications mainly use air conditioners as a means of temperature control. According to statistics, air conditioning electricity consumption usually accounts for 15% to 40% of the total electricity consumption of communication base stations, which brings huge electricity bills to communication operators. Especially under the peak-valley electricity price system, electricity prices are usually at their peak during the high temperature period during the day, and this is also the time period with the highest air conditioning usage rate, which further exacerbates the increase in electricity costs. Although the use of energy storage batteries to power air conditioners has achieved a balance between peak and valley electricity prices to a certain extent, the battery charging and discharging efficiency loss is relatively high, resulting in the inability to significantly reduce overall energy consumption and operating costs. Summary of the invention

[0005] In order to solve the above-mentioned problems, the present disclosure proposes a cold storage device for a communication base station and a control method thereof, which utilizes phase change materials to absorb energy for cooling when electricity prices are low, and when it is detected that the temperature inside the cabinet exceeds the requirement, the evaporator is started to release the cold absorbed by the phase change material; the number of phase change modules and the power of the compressor are adaptively configured according to the heating value inside the cabinet, so as to control the cold storage capacity to store cold when electricity prices are low and release cold at peak times, thereby achieving more efficient energy utilization and lower electricity bills.

[0006] In order to achieve the above objectives, the present disclosure adopts the following technical solutions:

[0007] A first aspect of the present disclosure provides a cold storage control method for a cold storage device for a communication base station, which is applied to a cold storage device for a communication base station, wherein the cold storage device includes a refrigeration device and a phase change module, and includes the following steps:

[0008] Obtain the electricity price period and the temperature inside the cabinet;

[0009] Adaptively configure the number of phase change modules connected based on the heat generated inside the communication base station cabinet and the duration of each electricity price period;

[0010] According to the temperature inside the cabinet body and the current electricity price period, the operating power of the refrigeration device and the operating status of the phase change module are adaptively configured to execute the corresponding control mode.

[0011] A second aspect of the present disclosure provides a cold storage device for a communication base station, comprising: a refrigeration device, a heat absorption device, a phase change module and a control module; the control module is configured to execute the above-mentioned cold storage control method for a cold storage device for a communication base station.

[0012] The refrigeration device and the heat absorption device are respectively connected to the phase change module through the control execution component to realize the cold storage and release of the phase change module; the control module is respectively communicated with the refrigeration device, the heat absorption device and the control execution component to control the control execution component to open and close the connecting pipes between the refrigeration device, the heat absorption device and the phase change module.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The method disclosed in the present invention monitors the electricity price period and cabinet temperature in real time through the control module, and dynamically adjusts the cold storage strategy in combination with the heating law of the power cabinet and the electricity price. The phase change module stores cold energy during the low electricity price period and releases cold energy during the high electricity price period to meet the temperature control requirements of the cabinet and minimize the electricity cost. The control module dynamically allocates the power of the refrigeration device by calculating the heat generation and cold energy requirements, and switches the cold storage and cold energy release modes according to the cabinet temperature. Intelligent matching of electricity prices and temperature control requirements is achieved, reducing electricity demand during high electricity price periods, thereby reducing operating costs. The utilization efficiency of the cold storage device is improved, and the temperature control stability of the communication base station cabinet is effectively guaranteed. Automated control reduces manual intervention and improves the convenience and reliability of operation.

[0015] The advantages of the present disclosure and the advantages of additional aspects will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure. The exemplary embodiments of the present disclosure and the description thereof are used to explain the present disclosure but do not constitute a limitation of the present disclosure.

[0017] Figure 1 is a schematic diagram of a cold storage device according to Embodiment 1 of the present disclosure;

[0018] Figure 2 is a schematic structural diagram of a phase change module 1 of a cold storage device according to Embodiment 1 of the present disclosure;

[0019] Figure 3 is a structural explosion diagram of the phase change module 1 of the cold storage device of Example 1 of the present disclosure;

[0020] Figure 4 is a first structural schematic diagram of a cold storage device according to Embodiment 1 of the present disclosure;

[0021] Figure 5 is a schematic structural diagram of a cold storage device in Embodiment 1 of the present disclosure arranged in a cabinet;

[0022] Figure 6 is an external schematic diagram of a cabinet according to Embodiment 1 of the present disclosure;

[0023] Figure 7 is a cross-sectional view of a cabinet of Embodiment 1 of the present disclosure from a certain perspective;

[0024] Figure 8 is a method flow chart of Embodiment 2 of the present disclosure;

[0025] Wherein: 1. phase change module, 2. evaporator, 3. compressor, 4. condenser, 5. external pipeline, 6. mounting frame, 7. mounting frame;

[0026] 1-1, refrigeration pipe, 1-2, phase change material, 1-3, liquid injection port, 1-4, first shell, 1-5, second shell, 1-6, sealing ring, 1-7, cover plate; DETAILED DESCRIPTION

[0027] The present disclosure is further described below in conjunction with the accompanying drawings and embodiments.

[0028] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present disclosure. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present disclosure belongs.

[0029] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof. It should be noted that, in the absence of conflict, the various embodiments in the present disclosure and the features in the embodiments can be combined with each other. The embodiments will be described in detail below in conjunction with the accompanying drawings.

[0030] Example 1

[0031] In the technical solutions disclosed in one or more embodiments, Figures 1 to 7As shown, a cold storage device for a communication base station includes: a refrigeration device, a heat absorption device, a phase change module 1 and a control module;

[0032] The refrigeration device and the heat absorption device are respectively connected to the phase change module 1 through the control execution component, so as to realize the cold storage and cold release of the phase change module 1;

[0033] The control module is respectively connected to the refrigeration device, the heat absorption device and the control execution component for controlling the control execution component to open and close the connecting pipes between the refrigeration device, the heat absorption device and the phase change module 1.

[0034] In this embodiment, a phase change module 1 is provided to realize the storage of cold energy, so that cold energy can be stored at a time when electricity is sufficient or electricity price is low. The stored cold energy can be released at a time when temperature is high or electricity price is high, thereby improving the cooling effect while realizing the regulation of energy consumption of the communication base station.

[0035] A further technical solution is that the control module is configured to adaptively configure the number of phase change modules 1 and the operation of the refrigeration device according to the heat generation inside the communication base station cabinet, so as to control the cold storage capacity and the internal temperature of the communication base station.

[0036] One possible implementation method is as follows: Figure 1 As shown, the control execution component includes a first three-way valve, a second three-way valve, a switch valve and a throttling control valve; the first three-way valve and the second three-way valve are respectively connected to the pipelines at both ends of the phase change module 1, and the refrigeration device and the heat absorption device delivery pipeline are respectively connected through the first three-way valve and the second three-way valve to form a cold storage pipeline and a cold release pipeline respectively; the switch valve is provided on the connecting pipeline between the second three-way valve and the phase change module 1, and the throttling control valve is provided on the connecting pipeline between the second three-way valve and the heat absorption device;

[0037] Specifically, Figure 1 As shown, the left pipeline is a cold storage pipeline. When the first three-way valve and the second three-way valve are respectively connected to the left side of the figure, the two ends of the refrigeration device are connected to the phase change module 1, and the phase change module 1 can be stored with cold through the refrigeration cycle; the two ends of the heat absorption device are connected to the phase change module 1, and the phase change module 1 can be released with cold through the heat absorption cycle;

[0038] A specific setting method that can be realized is that the refrigeration device is arranged outside the cabinet body, the heat absorption device is arranged inside the cabinet body, and the phase change module 1 is arranged on the inner wall of the cabinet body;

[0039] The cabinet body is a cabinet in which the cold storage device of this embodiment is installed, and in this embodiment, it can be a cabinet of a communication base station;

[0040] In some embodiments, multiple phase change modules 1 can be provided, and the multiple phase change modules 1 are connected through the external pipe 5 to form a parallel connection structure, which can be connected to the refrigeration device and the heat absorption device through the control execution component respectively. After each phase change module 1 is removed separately, it will not affect the work of other phase change modules 1;

[0041] Furthermore, another feasible technical solution is that multiple phase change modules 1 are set to be connected in series, and a controllable bypass pipe is set for each phase change module 1, so that bypass can be achieved through the bypass pipe when the corresponding phase change module 1 is removed.

[0042] In the above scheme, each phase change module 1 is connected in series through a pipeline to form a loop. Such a setting is convenient for delaying the cold storage time and making the cold release effect better. Each phase change module 1 is connected in series to form a cold storage and release loop.

[0043] In this embodiment, cold storage refers to the process of storing cold energy, and cold release refers to the process of releasing the stored cold energy.

[0044] Specifically, Figure 2 As shown, each phase change module 1 includes a heat-insulating shell, a refrigeration pipe 1-1 arranged in the heat-insulating shell, a phase change material 1-2 is injected into the space outside the refrigeration pipe 1-1 in the heat-insulating shell, and the refrigeration pipe 1-1 is used to provide a pipeline for the circulation of the refrigerant;

[0045] Optionally, the refrigeration pipe 1-1 is bent and arranged in the heat-insulating shell;

[0046] Specifically, the refrigeration pipe 1-1 is arranged in the heat-insulating shell in a bow-shaped bending shape with the ends connected. The structure of the refrigeration pipe 1-1 is set as a curved structure to increase the heat exchange area.

[0047] Optionally, a liquid injection port 1-3 is provided on the top of the heat-insulating shell, and the phase change material 1-2 can be injected into the cavity of the heat-insulating shell through the liquid injection port 1-3; the phase change material 1-2 realizes cold storage and cold release through the change of state;

[0048] Furthermore, a plurality of first temperature sensors are provided in the phase change module 1 for detecting the temperature of the phase change module 1, and the plurality of first temperature sensors are respectively connected to the control module;

[0049] like Figure 3 As shown, it is an exploded view of the heat-insulating shell structure of the phase change module 1, and the heat-insulating shell includes a first shell 1-4, a second shell 1-5, a sealing ring 1-6 and a cover plate 1-7; the first shell 1-4 and the second shell 1-5 are nested and connected, and the outer wall of the second shell 1-5 is adapted to the inner wall of the first shell 1-4 to achieve a tight fit, and the cover plate 1-7 presses the second shell 1-5 into the first shell 1-4 through the sealing ring 1-6;

[0050] The first shell 1-4 and the second shell 1-5 are respectively quadrilateral shells with single-side openings;

[0051] Optionally, the heat-insulating shell of the phase change module 1 is made of heat-insulating material, and the cabinet body of the communication base station cabinet is also made of heat-insulating material; through the double-layer heat-insulating shell and the cabinet body, the cold energy is delayed from being dissipated outside the cabinet.

[0052] In some embodiments, the heat absorption device is an evaporator 2, which is installed inside a cabinet of a communication base station. One end of the evaporator 2 is connected to one end of a pipe in the phase change module 1 through a first three-way valve, and the other end of the evaporator 2 is connected to the other end of the pipe in the phase change module 1 through a throttling control valve, a second three-way valve, and a switch valve.

[0053] In some embodiments, the control module may be a single chip microcomputer controller or a PLC controller.

[0054] Furthermore, it also includes a second temperature sensor, which is arranged inside the cabinet body and is communicatively connected to the control module; the second temperature sensor transmits the collected temperature to the control module.

[0055] In the above scheme, when the first temperature sensor detects that the temperature inside the cabinet exceeds the preset set value, the control module controls the throttling control valve to open and the throttling control valve works. At this time, the main controller controls the throttling control valve according to different temperatures to adjust the refrigerant flow rate flowing through the evaporator 2. The evaporator 2 evaporates the cold absorbed by the refrigerant to the inside of the cabinet body, thereby cooling the equipment inside the cabinet.

[0056] In some embodiments, the refrigeration device includes a compressor 3 and a condenser 4; the compressor 3 and the condenser 4 are installed on the outside of the cabinet, one end of the compressor 3 is connected to the refrigeration pipe 1-1 in the phase change module 1, and the other end is connected to the condenser 4 through an external pipe 5, and the other end of the condenser is connected to the phase change module 1.

[0057] In the above scheme, the compressor 3 in the refrigeration device compresses the low-temperature and low-pressure gas into a high-temperature and high-pressure gas. After the compressor 3 discharges the high-temperature and high-pressure gas into the condenser 4, it absorbs external cold energy, thereby condensing the high-temperature and high-pressure gas into a low-temperature and high-pressure liquid. After the liquid in the condenser 4 enters the phase change module 1, the temperature in the phase change module 1 is reduced, thereby realizing cold energy storage.

[0058] When the above device is used, if cold storage is performed when the electricity price is at a low point, the switch valve is opened, the compressor 3 works, and the refrigerant absorbs the heat of the phase change module and becomes a low-temperature, low-pressure gas and flows to the compressor 3. The compressor 3 compresses it into a high-temperature, high-pressure gas and flows to the condenser 4 outside the cabinet. The refrigerant releases heat in the condenser 4 and becomes a low-temperature, high-pressure liquid. This process is repeated continuously, and the phase change material 1-2 of the phase change module 1 is converted from liquid to solid, thereby storing cold. The cold storage capacity of the phase change module is used preferentially during the parity period or peak period.

[0059] like Figures 3 to 5 As shown, it is a structural diagram of a communication cabinet, and a phase change module 1 is arranged on the inner wall of the cabinet. Each phase change module 1 has a certain cold storage capacity, and the number of phase change modules 1 required for each cabinet is configured according to the required cold storage capacity of the heat dissipation in the cabinet, and multiple phase change modules 1 are connected and arranged by setting interfaces.

[0060] A specific example is that in order to realize the setting of components inside the cabinet, the cabinet is set as a frame structure, including a mounting frame 6 and a mounting rack 7. The mounting rack 7 can be set on both sides and the rear side of the cabinet. The mounting frame 6 provides an installation space for the phase change module 1, and the mounting frame 6 and the phase change module 1 can be fixed by bolts.

[0061] An installation box is provided at the top of the cabinet, in which a condenser 4 and a compressor 3 are provided, a plurality of heat dissipation holes are provided on the side wall of the installation box for heat dissipation, an evaporator is provided at the bottom of the installation box, and a switch valve and a throttling control valve are provided on the corresponding pipelines.

[0062] Example 2

[0063] Based on Example 1, this embodiment provides a control method for a cold storage device for a communication base station as described in Example 1, which can be implemented in a control module, such as Figure 8 As shown, the following steps are included:

[0064] Step S1, obtaining the electricity price period and the temperature inside the cabinet;

[0065] Step S2: Adaptively configure the number of connected phase change modules 1 according to the heat generated inside the communication base station cabinet and the duration of each electricity price period;

[0066] Step S3: According to the temperature inside the cabinet body and the current electricity price period, the operating power of the refrigeration device and the operating state of the phase change module 1 are adaptively configured to execute a corresponding control mode.

[0067] The method of this embodiment monitors the electricity price period and cabinet temperature in real time through the control module, and dynamically adjusts the cold storage strategy in combination with the heating law of the base station cabinet and the electricity price. The phase change module 1 stores cold energy during the low electricity price period and releases cold energy during the high electricity price period to meet the temperature control requirements of the cabinet and minimize the electricity cost. The control module dynamically allocates the power of the refrigeration device by calculating the heat generation and cold energy requirements, and switches the cold storage and cold energy release modes according to the cabinet temperature. Intelligent matching of electricity prices and temperature control requirements is achieved, reducing electricity demand during high electricity price periods, thereby reducing operating costs. The utilization efficiency of the cold storage device is improved, and the temperature control stability of the communication base station cabinet is effectively guaranteed. Automated control reduces manual intervention and improves the convenience and reliability of operation.

[0068] In step S2, the heat generated by the cabinet includes the heat generated by the internal equipment and the conduction heat. The conduction heat is calculated according to the parameters of the cabinet body and the temperature difference between the inside and outside of the cabinet body. The cold stored by the phase change module 1 during the valley period is used for the cold release during the parity period and the peak period. The specifications and quantity of the phase change module 1 are adaptively adjusted based on the balance between the cold storage and the cold release. The adaptive configuration method of the quantity of the phase change module 1 includes the following steps:

[0069] Step S21, calculating the heat generation and conduction heat inside the computer cabinet;

[0070] Step S22, calculating the cold storage capacity of a single phase change module 1;

[0071] Step S23, according to the heat generation inside the cabinet, the cold storage capacity and the duration of the electricity price period in the area, cold storage is performed during the valley period, cold is released during the normal period and the peak period, and the specifications and quantity of the phase change module 1 are adaptively adjusted to balance the cold storage capacity and the cold release capacity;

[0072] In step S21, the heat generated by the equipment inside the cabinet body can be queried from the specification sheet of each equipment or the manufacturer;

[0073] The conduction heat, that is, the heat conducted by the cabinet due to the temperature difference between the inside and outside, can be calculated according to the following formula:

[0074] P = A × λ × ΔT ÷ d;

[0075] Where: P is the rate of heat transfer through the material (in W, i.e., watts); A is the area of ​​heat transfer, λ is the thermal conductivity of the material (in W / (m·K)), ΔT is the temperature difference between the inside and outside of the cabinet, and d is the thickness of the material (in m);

[0076] For example, if the size of the cabinet is 800*800*1800, the heat transfer area A is 7.04 square meters; for PU material, the thermal conductivity λ is known to be 0.022~0.033W / (m·K), and the middle value 0.028W / (m·K) can be used for calculation; ΔT is the temperature difference (in K or ℃), the highest temperature in the cabinet is 35 degrees, and the outdoor temperature generally does not exceed 45 degrees. The cabinet uses sandwich panels with a thickness d of 50mm, that is, 0.05m.

[0077] Under this condition, taking the temperature difference of 10 degrees as an example, the heat conducted by the cabinet is:

[0078] P=7.04×0.028×10÷0.05=39.42W;

[0079] Furthermore, the calculation process of the configuration quantity of the phase change module 1 is as follows:

[0080] The internal volume of the phase change module 1 is V, and the melting latent heat per standard volume is Q 融 ;

[0081] Then the cooling capacity that can be stored in each phase change module 1 is: Q 蓄 =Q 融 ×V;

[0082] The total heat generated by the cabinet P f = Heat generated by internal equipment P s +Conduction heat P c ;

[0083] The cold energy stored during the off-peak period is used to release the cold energy during the parity period and the peak period. The number N of the configured phase change modules 1 is:

[0084] N=P f ×(t 1 +t 2 ) / Q 蓄 ;

[0085] Among them, t 1 is the duration of the normal period, t 2 The duration of the peak period.

[0086] In practical applications, P can be calculated based on c The number of phase change modules actually selected is adjusted according to the collected external temperature and the actual external temperature.

[0087] In the above scheme, the number of phase change modules 1 is related to the ambient temperature and the duration of the electricity price. The number of phase change modules 1 can be adaptively adjusted according to the change of the ambient temperature and the duration of the electricity price. First, the stored cold capacity can meet the cold capacity required during normal and peak periods under ideal conditions, and the cabinet body can be cooled at the lowest cost. Second, the number of phase change modules 1 can be adjusted in real time after the ambient temperature changes, so that more phase change modules 1 are turned on in summer and fewer phase change modules 1 are turned on in winter, avoiding energy waste caused by storing too much cold capacity.

[0088] The calculation process of the number N of phase change modules 1 is described below with a specific example:

[0089] The inner dimensions of the phase change module 1 are: 600mm×100mm×800mm, and its volume is 48L. Excluding the internal refrigeration pipe, 46L of liquid can be injected. When water is injected, the weight is 46kg.

[0090] Using water as the phase change material, when ice melts into water, it absorbs a certain amount of heat, which is called the latent heat of melting (L_f). For ice, the latent heat of melting is about 334kJ / kg;

[0091] Then the cold capacity that can be stored in each phase change module 1 is: 334*46=15456 kJ.

[0092] If the heat generated in the cabinet is 200W, the total heat dissipation power in the cabinet is 200+39.42=239.42W;

[0093] For the convenience of calculation, the heating power is taken as 240W;

[0094] The local low temperature duration is 8 hours, so the phase change module 1 needs to provide cooling capacity for 16 hours;

[0095] The total calorific value is: 240W*16*3600S / 1000=13824KJ;

[0096] If the loss of conversion efficiency is not considered, a phase change module 1 of the above specifications can meet the heat dissipation requirement for 16 hours; in actual use, one more module may be considered.

[0097] In step S3, according to the temperature inside the cabinet body and the current electricity price period, the operating power of the refrigeration device and the operating state of the phase change module 1 are adaptively configured, and the corresponding control mode is executed, including:

[0098] Step S31, during the valley period, the heat absorption device is controlled to work according to the temperature in the cabinet body, and at the same time, the cold storage mode is turned on, and the refrigeration device stores cold in the phase change module 1;

[0099] Step S32, in normal time, the heat absorbing device is controlled to work according to the temperature in the cabinet body. When the heat absorbing device needs to be turned on, the cooling mode is turned on to control the phase change module 1 to release cooling, and the phase change module 1 is controlled to store cooling according to the next electricity price period;

[0100] Step S33, during the peak period, the heat absorbing device is controlled to work according to the temperature in the cabinet body. When the heat absorbing device needs to be turned on, the cooling mode is turned on to control the phase change module 1 to release cooling;

[0101] Among them, the cold storage mode refers to the working mode in which the control module controls the operation of the refrigeration device so that the phase change module 1 stores cold energy; the cold release mode refers to the working mode in which the control module controls the operation of the heat absorption device so that the phase change module 1 releases cold energy and the heat absorption device operates; the control mode also includes air-conditioning mode and standby mode. The air-conditioning mode refers to the working mode in which the refrigeration device is directly connected to the heat absorption device for cooling operation; the standby mode refers to the working mode in which neither the refrigeration device nor the heat absorption device is operating.

[0102] In some embodiments, in step 31, the control logic in the valley period is used, and the control process includes the following steps:

[0103] Step S31.1, judging whether cooling needs to be released according to the obtained temperature inside the cabinet;

[0104] Specifically, when the temperature inside the cabinet exceeds the set warning temperature range, it is determined that cooling needs to be released;

[0105] The temperature in the cabinet is compared with the upper limit and lower limit of the preset warning temperature range to determine whether the temperature in the cabinet is the warning temperature, and then determine the cooling strategy that needs to be implemented in the cabinet.

[0106] Among them, the preset warning temperature range is the controllable temperature range of the power cabinet, which is the temperature range that does not affect the operation of the cabinet. Optionally, the warning temperature range can be set to between 26°C and 35°C.

[0107] Step S31.2, when in the stage where cold release is required, if the phase change module 1 has not completed cold storage, part of the cold energy of the refrigeration device is supplied to the heat absorption device for cabinet cooling, and the other part is supplied to the phase change module 1 for cold storage, and the cold storage mode and the air conditioning mode are operated simultaneously; otherwise, the phase change module 1 has completed cold storage, and all the cold energy of the refrigeration device is supplied to the heat absorption device for cabinet cooling, which is the air conditioning mode;

[0108] In this step, the refrigeration is performed by the refrigeration device, and only the cold energy is transferred to the phase change module 1 and stored as a primary cold storage mode;

[0109] In this step, if the refrigeration device is controlled to operate, the heat absorption device releases cold and the phase change module 1 stores cold, this can cool the power cabinet within the controllable range of the warning temperature while ensuring that the phase change module 1 stores cold energy during low-peak periods, which is a secondary cold storage mode.

[0110] A1) If the phase change module 1 has not completed cold storage and the temperature in the cabinet is within the preset warning temperature range, the first-level cold storage mode is executed: the compressor 3 in the refrigeration device works, the switch valve is opened, the throttling control valve is closed, the heat absorption device does not work, and the phase change module 1 is preferentially stored in cold energy until the phase change module 1 completes cold storage and ends the cold storage stage.

[0111] A2) If the current cold storage state of the phase change module 1 is incomplete cold storage, and the temperature in the cabinet exceeds the preset upper limit of the warning temperature range, the secondary cold storage mode is executed to control the operation of the refrigeration device, so that the heat absorption device releases cold and the phase change module 1 stores cold, until the current cold storage state of the phase change module 1 is changed to complete cold storage and the cold storage stage is ended. During this process, the refrigeration device operates at full power until the cold storage is completed and the operating power of the refrigeration device is adjusted according to the temperature;

[0112] A3) If the phase change module 1 has completed cold storage, the air conditioning mode is executed to release cold, that is, the switch valve is disconnected, the throttling control valve is opened, and the operating power of the refrigeration device is regulated according to the temperature in the cabinet; at this time, the refrigeration device is directly connected to the heat absorption device, and the cold energy produced by the refrigeration device is directly transferred to the heat absorption device for evaporation, thereby cooling the power cabinet until the temperature in the cabinet is lower than the lower limit of the preset warning temperature range, and then switching to standby mode.

[0113] Step S31.3: When the cold release is not required, if the phase change module 1 has not completed the cold storage, all the cold capacity of the refrigeration device is used for the cold storage of the phase change module 1, which is the cold storage mode; otherwise, the phase change module 1 completes the cold storage, and the refrigeration device and the heat absorption device stop working, which is the standby mode;

[0114] Furthermore, a method for determining whether the phase change module 1 has completed cold storage is to monitor the temperature change of the phase change module 1 by installing temperature sensors at multiple positions of the phase change module 1 to determine the current cold storage state of the phase change module 1, specifically:

[0115] 1) detecting the temperature of each second temperature sensor installed on the phase change module 1, and comparing the temperature of each second temperature sensor with a preset cold storage temperature;

[0116] The preset cold storage temperature is the temperature at which the phase change module 1 undergoes a phase change state change.

[0117] 2) When the temperature of each second temperature sensor reaches the preset cold storage temperature and remains unchanged within a certain preset time, it indicates that the phase change module 1 has reached the preset cold storage temperature, and the current state of the phase change module 1 is judged to be completed cold storage. When the temperature of any temperature sensor does not reach the preset cold storage temperature, the current cold storage state of the phase change module 1 is judged to be incomplete cold storage.

[0118] For example, the phase change material is water, the preset time period can be 5 minutes, and the preset cold storage temperature can be 0°C. If the temperature detected by each temperature sensor reaches 0°C and remains stable within 5 minutes, it indicates that cold storage is completed. If any temperature sensor does not reach 0°C, it indicates that cold storage is not completed.

[0119] Step S32 is the control logic in normal time. The control process includes:

[0120] Step S32.1: judging whether the temperature inside the cabinet exceeds a set threshold range according to the obtained temperature inside the cabinet, and if it is higher than the set threshold range, cooling needs to be released;

[0121] Step S32.2: During normal periods, if the temperature in the cabinet is higher than the set threshold range and needs to be released, the heat absorption module is turned on to release the cold; the cold capacity of the phase change module 1 is released first, and if it is insufficient, the refrigeration device is turned on to supplement the cold capacity;

[0122] Specifically, during normal periods, if cold release is required and the phase change module 1 has stored cold energy, the phase change module 1 is controlled to enter the cold release mode until the cold energy of the phase change module 1 is fully released, that is, the cold release is completed. At the same time, the refrigeration module is controlled to be turned on according to the proportion of the temperature in the cabinet being higher than the set threshold range; at this time, if the temperature is high and cold release is still required, the refrigeration module and the heat absorption module are turned on to execute the air conditioning mode and perform temperature control until the temperature in the cabinet meets the set requirements;

[0123] In normal times, if cold release is required and the phase change module 1 has no stored cold capacity, the refrigeration module and the heat absorption module are turned on to execute the air conditioning mode and perform temperature control until the temperature inside the cabinet meets the set requirements;

[0124] Step S32.3: In normal periods, determine whether the phase change module 1 needs to store cold energy. If cold energy needs to be stored and the next electricity price period is a peak period, control the phase change module 1 to be in cold storage mode; otherwise, the phase change module 1 does not start the cold storage mode.

[0125] Among them, it is judged whether the phase change module 1 needs to store cold energy. When the temperature in the phase change module 1 is not less than the set value, it means that the phase change module needs to store cold energy and has cold energy storage space.

[0126] In step S32.2, the current cooling state of the phase change module 1 is determined, and the current cooling state includes incomplete cooling and completed cooling;

[0127] In the cooling stage of the phase change module 1, the temperature change of the phase change module 1 is monitored to determine whether the cooling of the phase change module is completed, and the following steps are performed:

[0128] (B1) setting a cooling release temperature threshold, and comparing the acquired temperature in the phase change module 1 with the cooling release temperature threshold;

[0129] Specifically, the temperature of each second temperature sensor of the phase change module 1 is detected, and the temperature of each second temperature sensor is compared with the preset cooling release temperature threshold to generate a second comparison result. The preset cooling release temperature is the temperature at which the phase change material is converted from the state after cold storage to the original state. For example, the phase change state of water of the phase change material is 0°C, and the temperature of the original state can be 5°C. If the phase change material is water, the cooling release temperature threshold can be set to 5°C.

[0130] (B2) If the temperature detected in the phase change module 1 is greater than the preset cooling release temperature, it is determined that the current cooling release state of the phase change module 1 is completed;

[0131] (B3) If any temperature detected in the phase change module 1 is lower than the preset cooling release temperature, it is determined that the current cooling release state of the phase change module 1 is incomplete cooling release.

[0132] In the above step S32.2, there are two cooling modes:

[0133] Primary cooling mode: The cooling device is not running, and the phase change module 1 and the heat absorption device are running to release cooling capacity;

[0134] If the current electricity price period is a parity period, the next period type is a valley period, and the current cooling state of the phase change module 1 is incomplete cooling, the first-level cooling mode is executed, the refrigeration device is controlled to work so that the heat absorption device releases cooling, and when the current cooling state of the phase change module 1 is changed to complete cooling, the air conditioning mode is switched to the air conditioning mode until the temperature in the cabinet is lower than the lower limit of the preset warning temperature range, and then the standby mode is switched;

[0135] The current electricity price period is a parity period, and the next period type is a valley period, indicating that cold storage can be performed in the next period. Therefore, when the current cold release state of the phase change module 1 is incomplete cold release, the first-level cold release mode is executed. At this time, the compressor 3 of the refrigeration device does not work, the switch valve and the throttling control valve are opened, the heat absorption device releases cold, and the cold stored in the phase change module 1 flows to the heat absorption device for evaporation, so as to cool down the power cabinet. When the phase change module completes cold release, it switches to the air conditioning mode. At this time, the compressor 3 and the throttling control valve of the refrigeration device work, and the switch valve is closed until the temperature in the cabinet is lower than the lower limit of the preset warning temperature range, and then switches to the standby mode.

[0136] Secondary cooling mode: the refrigeration device is running, the phase change module 1 is turned on to release cooling, and the heat absorption device is releasing cooling; after the secondary cooling mode, if the temperature reaches the required range, step S32.3 can be executed to control whether the phase change module 1 stores cooling during normal periods;

[0137] In step S32.3, if the next time period type is a peak time period, and the current cooling state of the phase change module 1 is incomplete cooling, in order to meet the cooling needs of the next peak time period and reduce electricity costs, the refrigeration device is controlled to operate, the switch valve and the throttling control valve are opened, and the cooling capacity generated by the refrigeration device is transferred to the phase change module 1 for cooling storage and the heat absorption device for cooling release until the cooling capacity meets the needs of the next time period, ending the cooling release stage and switching to standby mode.

[0138] Furthermore, during normal periods, it is possible to evaluate whether the cold storage capacity of the current cold storage module can meet the demand for use during the next period, i.e., the peak period. If it cannot meet the cold demand during the peak period, cold storage is performed.

[0139] The remaining cooling capacity Q needs to be calculated 余 , Q 余 =Q 蓄 -Q 用 , and the used cooling capacity Q 用 It can be estimated by the following method:

[0140] First, the heat absorption P of the refrigerant in the phase change module 1 吸 It can be calculated by the following formula:

[0141] P 吸 =mr×ΔH;

[0142] Where: P 吸 is the heat absorption of the refrigerant, in W or J / s;

[0143] m_r is the mass flow rate of refrigerant, in kg / s;

[0144] ΔH is the incremental enthalpy, in J / kg;

[0145] The incremental enthalpy ΔH can be calculated using the following formula:

[0146] ΔH=m×cp×ΔT;

[0147] Where: ΔH is the change in enthalpy; m is the mass of the refrigerant; cp is the specific heat capacity of the refrigerant; ΔT is the temperature change of the refrigerant.

[0148] Used cooling capacity Q 用 It can be calculated by the following formula:

[0149] Q 用 =∑P i ×ti ÷η;

[0150] Where: Q 用 is the cooling capacity used; P i is the power of the refrigerant at different temperatures in the cabinet through absorbing heat in the phase change module 1; t i is the time maintained at a certain temperature. For the convenience of calculation, the minimum unit is 1°C. η is the cooling efficiency. This value is generally an empirical value and can be obtained from test data.

[0151] If it is calculated that the current cold storage capacity cannot meet the next peak usage, then refrigeration needs to be turned on during the current period so that the cold storage capacity of the phase change module can meet the usage.

[0152] In step S33, there is the control logic when the electricity price period is the peak period. Specifically: if the current electricity price period is the peak period, and the current state of the phase change module 1 is that the cooling is not completed, the phase change module 1 is released first, and then the refrigeration device is used for cooling; the refrigeration device is controlled to make the heat absorption device release cooling, and when the current cooling state of the phase change module 1 is changed to complete cooling, the air-conditioning mode is switched until the temperature in the cabinet is lower than the lower limit of the preset warning temperature range, the cooling stage is ended, and the system is switched to the standby mode.

[0153] In this step, the current electricity price period is a peak period. If the next period type is a parity period or a valley period, generally, only cold is released but not stored during the peak period. Therefore, if the heat absorption device releases cold at this time, the switch valve is closed, the throttling switch valve is opened, the refrigeration device does not work, and the phase change module 1 continues to release cold. When the phase change module 1 completes the cold release, it switches to the air-conditioning mode to continue releasing cold until the temperature in the cabinet is lower than the lower limit of the preset warning temperature range.

[0154] In the above step S3, the control of cold release and cold storage is carried out in different time periods, and cold is released in each time period according to the temperature in the cabinet; in the cold release process in the cold release mode, the flow rate of the cold release amount can be adjusted according to the temperature change in the cabinet, and the temperature change in the cabinet is detected. Based on the temperature change in the cabinet, the heat absorption device is controlled to adjust the cold release amount. The cold release amount adjustment steps are as follows:

[0155] If the temperature in the current cabinet rises within the warning temperature range, the cooling capacity will be increased;

[0156] If the current temperature in the cabinet drops within the warning temperature range, the cooling capacity will be reduced;

[0157] If the current cabinet temperature exceeds the upper limit of the warning temperature range, the control execution component is fully opened and the cooling capacity is the maximum value.

[0158] In a further technical solution, during the cooling process, the amount of cooling released is controlled by controlling a throttling control valve connected to the heat absorbing device. During the cooling process of the heat absorbing device, the opening of the throttling control valve is controlled step by step according to the degree of temperature change in the cabinet;

[0159] Specifically, during the parity or peak hours, if the temperature still rises, the throttling control valve is controlled to increase the flow area (the size of the throttling port) by 10% for every 1 degree increase, thereby increasing the flow, heat exchange and cooling; if it drops by 1 degree, the throttling control valve is controlled to reduce the flow area by 10% to reduce the flow, thereby reducing the flow and heat exchange; if the temperature inside the cabinet exceeds the upper limit of the set warning temperature range, the throttling control valve is fully opened. For example, the preset warning temperature range can be 26 degrees-35 degrees. If it is greater than or equal to 35 degrees, the throttling control valve is fully opened (100%).

[0160] The method of this embodiment monitors the electricity price period and cabinet temperature in real time through the control module, and dynamically adjusts the cold storage strategy in combination with the heating law of the outdoor power supply for communication and the electricity price. In the low-price period, the cold storage is fully stored, the efficient cold storage characteristics of the phase change material are utilized to reduce the energy consumption during the peak period, and the number and specifications of the phase change module 1 are dynamically adjusted to accurately match the demand according to the actual heat output, avoiding over-configuration or waste of resources. Combined with the total heat dissipation of the cabinet and the valley duration, the power demand of the compressor 3 is accurately estimated to provide a scientific basis for system design. The control module dynamically allocates the power of the refrigeration device by calculating the heat output and cold demand, and switches the cold storage and cold release modes according to the cabinet temperature. Intelligent matching of electricity prices and temperature control requirements is achieved, reducing the electricity demand during high electricity price periods, thereby reducing operating costs. The utilization efficiency of the cold storage device is improved, and the temperature control stability of the outdoor power supply for communication is effectively guaranteed. Automatic control reduces manual intervention and improves the convenience and reliability of operation.

[0161] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

[0162] Although the above describes the specific implementation methods of the present disclosure in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present disclosure. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present disclosure, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present disclosure.

Claims

1. A cold storage control method for a cold storage device for a communication base station, applied to a cold storage device for a communication base station, the cold storage device comprising a refrigeration device and a phase change module, characterized in that: The steps include: Obtain the electricity price period and the temperature inside the cabinet; Adaptively configure the number of phase change modules connected based on the heat generated inside the communication base station cabinet and the duration of each electricity price period; According to the temperature inside the cabinet body and the current electricity price period, the operating power of the refrigeration device and the operating status of the phase change module are adaptively configured to execute the corresponding control mode.

2. A cold storage control method for a cold storage device for a communication base station according to claim 1, characterized in that: The method for adaptively configuring the number of phase change modules comprises the following steps: Heat generation and conduction inside the computer cabinet; Calculate the cold storage capacity of a single phase change module; Based on the calculated heat generation and cold storage capacity inside the cabinet and the length of the electricity price period in the area, cold is stored during the off-peak period and released during the normal and peak periods. The specifications and quantity of the phase change modules are adaptively adjusted to balance the cold storage and release capacity.

3. A cold storage control method for a cold storage device for a communication base station according to claim 1, characterized in that: According to the temperature inside the cabinet and the current electricity price period, the operating power of the refrigeration device and the operating status of the phase change module are adaptively configured to execute the corresponding control mode, including: During the off-peak period, the heat absorption device is controlled to work according to the temperature inside the cabinet body. At the same time, the cold storage mode is turned on and the refrigeration device stores cold in the phase change module. In normal times, the heat absorbing device is controlled to work according to the temperature in the cabinet body. When the heat absorbing device needs to be turned on, the cooling mode is turned on to control the phase change module to release cooling, and the phase change module is controlled to store cooling according to the next electricity price period; During peak hours, the heat absorbing device is controlled to work according to the temperature inside the cabinet body. When the heat absorbing device needs to be turned on, the cooling mode is turned on to control the phase change module to release cooling.

4. A cold storage control method for a cold storage device for a communication base station as claimed in claim 3, characterized in that: During the valley period, the control process includes the following steps: Determine whether cooling is required based on the obtained temperature inside the cabinet; When the cold needs to be released, if the phase change module has not completed cold storage, part of the cold energy of the refrigeration device is supplied to the heat absorption device for cabinet cooling, and the other part is supplied to the phase change module for cold storage, and the cold storage mode and air conditioning mode are operated simultaneously; otherwise, the phase change module has completed cold storage, and all the cold energy of the refrigeration device is supplied to the heat absorption device for cabinet cooling, which is the air conditioning mode; When it is in the stage where cold release is not required, if the phase change module has not completed cold storage, all the cold capacity of the refrigeration device is used to store cold in the phase change module, which is the cold storage mode; Otherwise, the phase change module completes cold storage, and the refrigeration device and the heat absorption device stop working, entering the standby mode; Alternatively, the corresponding control modes include: The cold storage mode is a working mode in which the control module controls the operation of the refrigeration device to make the phase change module store cold energy; The cold release mode is a working mode in which the control module controls the heat absorption device to work, so that the phase change module releases cold energy and the heat absorption device operates; The control mode also includes air conditioning mode and standby mode. The air conditioning mode is a working mode in which the refrigeration device is directly connected to the heat absorption device for cooling operation; the standby mode is a working mode in which neither the refrigeration device nor the heat absorption device is in operation.

5. A cold storage control method for a cold storage device for a communication base station as claimed in claim 3, characterized in that: During normal times, the control process includes: According to the obtained temperature inside the cabinet, it is determined whether the temperature inside the cabinet exceeds the set threshold range. If it is higher than the set threshold range, cooling needs to be released; During normal periods, if the temperature inside the cabinet is higher than the set threshold range and needs to be released, the heat absorption module is turned on to release the cold; the cold capacity of the phase change module is released first, and if it is insufficient, the refrigeration device is turned on to supplement the cold capacity; During normal periods, it is determined whether the phase change module needs to store cold energy. If cold energy needs to be stored and the next electricity price period is a peak period, the phase change module is controlled to be in cold storage mode; otherwise, the phase change module does not start the cold storage mode.

6. A cold storage control method for a cold storage device for a communication base station as claimed in claim 5, characterized in that: By monitoring the temperature change of the phase change module, it is determined whether the phase change module has completed cooling. Specifically: Setting a cooling release temperature threshold, and comparing the acquired temperature in the phase change module with the cooling release temperature threshold; If the temperature detected in the phase change module is greater than the preset cooling release temperature, it is determined that the current cooling release state of the phase change module is completed; If there is an area where the temperature detected in the phase change module is lower than the preset cooling release temperature, it is determined that the current cooling release state of the phase change module is incomplete cooling release.

7. A cold storage control method for a cold storage device for a communication base station according to claim 1, characterized in that: During the cooling process, the amount of cooling released is controlled by controlling the throttling control valve connected to the heat absorption device. During the cooling process of the heat absorption device, the opening of the throttling control valve is controlled step by step according to the degree of temperature change in the cabinet.

8. A cold storage device for a communication base station, characterized in that: include: A refrigeration device, a heat absorption device, a phase change module and a control module; the control module is configured to execute a cold storage control method for a cold storage device for a communication base station according to any one of claims 1 to 7; The refrigeration device and the heat absorption device are respectively connected to the phase change module through the control execution component to realize the cold storage and release of the phase change module; the control module is respectively communicated with the refrigeration device, the heat absorption device and the control execution component to control the control execution component to open and close the connecting pipes between the refrigeration device, the heat absorption device and the phase change module.

9. A cold storage device for a communication base station as claimed in claim 8, characterized in that: The control execution component includes a first three-way valve, a second three-way valve, a switch valve and a throttling control valve; the first three-way valve and the second three-way valve are respectively connected to the pipelines at both ends of the phase change module, and the refrigeration device and the heat absorption device delivery pipelines are respectively connected through the first three-way valve and the second three-way valve to form a cold storage pipeline and a cold release pipeline respectively; the switch valve is arranged on the connecting pipeline between the second three-way valve and the phase change module, and the throttling control valve is arranged on the connecting pipeline between the second three-way valve and the heat absorption device.

10. A cold storage device for a communication base station according to claim 8, characterized in that: A plurality of phase change modules are provided, and the plurality of phase change modules are connected through external pipelines to form a parallel connection structure; Alternatively, a plurality of phase change modules are arranged in a structure connected in series, and a controllable bypass pipe is provided for each phase change module.

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