Condensation heat recovery double-circulation system and control method

Abstract

The invention discloses a condensation heat recovery dual-circulation system and a control method, relates to the technical field of air conditioning equipment, and provides the condensation heat recovery dual-circulation system to solve the problems that different equipment is deployed for a data machine room and an auxiliary room of a current data center due to different temperature requirements, so that resources are wasted and the like. On the basis that a natural cold source is utilized, another condenser is arranged in a second area (such as an auxiliary room), so that heat recycled in the first area (such as a data machine room) is reutilized to the second area to be released, refrigeration and cooling of the first area are achieved, heating and temperature rising of the second area are achieved, the energy utilization rate is greatly increased, and the energy consumption is reduced. Therefore, power consumption is reduced. Meanwhile, the system is a fluorine pump and compressor dual-power circulating system, the refrigerating and heating effects of the compressor mode are good, and the energy-saving effect of the fluorine pump mode is good. Therefore, the system can flexibly switch own working modes according to different actual application scenes so as to adapt to different working requirements.

Description

Technical Field

[0001] The present application relates to the technical field of air-conditioning equipment, and in particular to a condensation heat recovery dual circulation system and a control method. Background Art

[0002] For some auxiliary rooms in some data centers, such as oil machine rooms and office halls, the room temperature of the auxiliary rooms needs to be kept within a certain range to ensure the working needs of equipment and personnel. Therefore, in winter or transitional seasons when the temperature is low, heating equipment needs to be deployed to ensure that the room temperature of the auxiliary rooms is not too low. However, the data room of a data center is characterized by the need to cool the data room all day long throughout the year to ensure that the equipment in the data room does not overheat, and generally requires the deployment of refrigeration equipment such as air conditioners to achieve the cooling and cooling function.

[0003] Therefore, in the process of implementing this application, the inventors found that the prior art has at least the following problems: when the outdoor ambient temperature is low in winter, the data center has the characteristics that the data room needs air conditioning and other refrigeration equipment for cooling, and the auxiliary room needs heating equipment for heating. At this time, using two independent refrigeration and heating equipment will lead to problems such as waste of electricity and low energy utilization, which does not meet the current development direction and actual needs of energy conservation and emission reduction.

[0004] Therefore, technicians in this field are in urgent need of a condensation heat recovery dual-circulation system to solve the problem of low energy utilization caused by the need to deploy refrigeration equipment in data centers and heating equipment in auxiliary rooms to meet different temperature requirements. Summary of the invention

[0005] The purpose of the present application is to provide a condensing heat recovery dual-circulation system and control method to improve the problem of low energy utilization in the current data center where the data room and auxiliary rooms may be separately deployed with refrigeration equipment and heating equipment due to different temperature requirements.

[0006] In order to solve the above technical problems, the present application provides a condensation heat recovery dual circulation system, including: an evaporator, a compressor, a first condenser, a second condenser, a fluorine pump, a first bypass pipe and a second bypass pipe;

[0007] Wherein, the evaporator, the compressor, the first condenser, the second condenser and the fluorine pump are sequentially connected in series through pipelines to form a circulation loop; the first bypass pipe is connected in parallel at the inlet and outlet of the compressor, and the second bypass pipe is connected in parallel at the inlet and outlet of the fluorine pump;

[0008] The evaporator is disposed in a first region, the first condenser is disposed in a second region, and the second condenser is disposed in an outdoor environment.

[0009] In a possible embodiment, it further includes: a controller, a first temperature sensor and a second temperature sensor;

[0010] Wherein, the first temperature sensor is arranged in the first area, and the second temperature sensor is arranged in an outdoor environment;

[0011] The controller is connected to the first temperature sensor, the second temperature sensor, the controlled end of the compressor and the controlled end of the fluorine pump, and is used to control the condensation heat recovery dual circulation system to operate in compressor mode or fluorine pump mode according to the temperature values ​​collected by the first temperature sensor and the second temperature sensor.

[0012] In a possible embodiment, the invention further includes: a third temperature sensor, a third bypass pipe, a first electric two-way valve and a second electric two-way valve;

[0013] Wherein, the third temperature sensor is arranged in the second area;

[0014] The third bypass pipe is connected in parallel at the inlet and outlet of the first condenser;

[0015] The first electric two-way valve is arranged at the inlet of the first condenser, and the second electric two-way valve is arranged at the third bypass pipe;

[0016] The third temperature sensor, the controlled end of the first electric two-way valve and the controlled end of the second electric two-way valve are connected to the controller;

[0017] The controller is also used to control the switching states of the first electric two-way valve and the second electric two-way valve according to the temperature value collected by the third temperature sensor to select the branch where the first condenser is located or the branch where the third bypass pipe is located.

[0018] In a possible embodiment, it further includes: a first one-way valve, a second one-way valve and a third one-way valve;

[0019] Wherein, the first one-way valve is arranged at the first bypass pipe, the second one-way valve is arranged at the second bypass pipe, and the third one-way valve is arranged at the outlet of the first condenser.

[0020] In a possible embodiment, the present invention further includes: a first fan, a second fan, a first pressure sensor, and a second pressure sensor;

[0021] Wherein, the first fan is arranged at the first condenser, the second fan is arranged at the second condenser, the first pressure sensor is arranged at the outlet of the first condenser, and the second pressure sensor is arranged at the outlet of the second condenser;

[0022] The first fan, the second fan, the first pressure sensor and the second pressure sensor are connected to the controller, and the controller is also used to: control the speed of the first fan according to the pressure value collected by the first pressure sensor, and control the speed of the second fan according to the pressure value collected by the second pressure sensor.

[0023] In a possible embodiment, it further includes: a throttling device;

[0024] The throttling device is arranged at the inlet of the evaporator.

[0025] In order to solve the above technical problems, the present application also provides a condensation heat recovery dual cycle control method, which is applied to the condensation heat recovery dual cycle system as described above, comprising:

[0026] Obtain temperature values ​​of the outdoor environment and the first area;

[0027] Determine whether the difference between the temperature value of the outdoor environment and the temperature value of the first area is greater than a preset switching temperature difference;

[0028] If yes, turn on the fluorine pump and turn off the compressor;

[0029] If not, start the compressor and close the fluorine pump.

[0030] In a possible embodiment, after the steps of starting the fluorine pump and shutting down the compressor, the method further includes:

[0031] Determine whether the difference between the temperature value of the outdoor environment and the temperature value of the first area is less than the difference between the switching temperature difference and a preset first hysteresis;

[0032] If so, turn on the compressor and turn off the fluorine pump.

[0033] In a possible embodiment, after the steps of starting the fluorine pump and shutting down the compressor, and the steps of starting the compressor and shutting down the fluorine pump, the method further includes:

[0034] Obtaining the temperature value of the second area;

[0035] Determining whether the temperature value of the second area is less than a preset temperature setting value;

[0036] If yes, controlling the first condenser to enter an operating state to release heat to the second region;

[0037] If not, the first condenser is controlled to enter a standby or closed state.

[0038] In a possible embodiment, after the step of controlling the first condenser to enter an operating state to release heat to the second region, the method further includes:

[0039] Determine whether the temperature value of the second area is greater than the difference between the temperature setting value and a preset second hysteresis;

[0040] If so, the first condenser is controlled to enter a standby or closed state.

[0041] The condensation heat recovery dual circulation system provided by the present application has at least the following beneficial effects:

[0042] According to the different physical space locations of the components, the system is divided into three components: the first area, the second area and the outdoor environment. Among them, the first area partially meets the cooling demand of the first area through the evaporator (for example, the cooling demand of the data room in the data center all day and all year round). At the same time, the evaporator can recover the heat in the first area, so that the heat enters the second area along the circulation pipeline and releases heat through the first condenser to meet the heating demand of the second area in scenes such as low temperature (for example, the heating demand of the auxiliary room in the data center). In addition, when the second area does not need to be heated, the heat recovered in the first area can also be heat-circulated through the second condenser set in the outdoor environment. That is, on the basis of being able to utilize the natural cold source in the first area, the system also realizes the heat cycle between the first area and the second area, and recovers the heat in the first area and releases it to the second area to meet the heating needs of the second area. On the other hand, the system also includes two circulation devices, a compressor and a fluorine pump, and the system can be selected to work in the compressor mode or the fluorine pump mode according to the different cooling and heating needs of the actual scene. The compressor mode has better cooling and heating effects, and the fluorine pump mode has higher energy utilization, which makes the heat cycle based on the system more flexible and better adapted to the different needs in the actual application scenarios. In addition, the control structure of the system is simple and accurate, and the first area where the evaporator is deployed and the second area where the first condenser is deployed are not limited to the data room and auxiliary rooms of the data center, and can be quickly adapted to energy-saving renovations in different projects.

[0043] The condensation heat recovery dual-circulation control method provided in the present application corresponds to the above-mentioned condensation heat recovery dual-circulation system, and has the same effect as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 A structural diagram of a condensation heat recovery dual circulation system provided by the present invention;

[0046] Figure 2 A flow chart of a condensation heat recovery dual-cycle control method provided by the present invention;

[0047] Figure 3 A flow chart of another condensation heat recovery dual-cycle control method provided by the present invention;

[0048] Among them, 1 is an evaporator, 2 is a compressor, 3 is a first condenser, 4 is a second condenser, 5 is a fluorine pump, 6 is a first bypass pipe, 7 is a second bypass pipe, 8 is a first temperature sensor, 9 is a second temperature sensor, 10 is a third temperature sensor, 11 is a third bypass pipe, 12 is a first electric two-way valve, 13 is a second electric two-way valve, 14 is a first check valve, 15 is a second check valve, 16 is a third check valve, 17 is a first fan, 18 is a second fan, 19 is a first pressure sensor, 20 is a second pressure sensor, and 21 is a throttling device. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] The core of this application is to provide a condensation heat recovery dual circulation system and a control method.

[0051] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0052] In data centers, which have a high demand for refrigeration equipment, the data rooms need to be cooled and cooled all year round. However, data centers also include other auxiliary rooms, such as oil rooms, office halls, and other rooms. These rooms have fewer heating devices and the room temperature is more easily affected by the outdoor temperature. In winter and other seasons with lower temperatures, these auxiliary rooms need to be heated to ensure that the room temperature remains within a more comfortable range. At this point, the data center has two scenarios with completely different temperature requirements: a data room that needs to be equipped with refrigeration equipment for cooling and cooling, and an auxiliary room that needs to be equipped with heating equipment for heating and heating.

[0053] Generally, different temperature requirements require different temperature control equipment to be deployed to meet them, which will cause a huge waste of electricity. If the condensation heat during data center cooling can be recovered and used to assist room heating, the energy utilization rate can be greatly improved, thereby greatly reducing electricity consumption. Therefore, in order to achieve the above purpose, the present application provides a condensation heat recovery dual circulation system, such as Figure 1 As shown, it includes: an evaporator 1, a compressor 2, a first condenser 3, a second condenser 4, a fluorine pump 5, a first bypass pipe 6 and a second bypass pipe 7;

[0054] Among them, the evaporator 1, the compressor 2, the first condenser 3, the second condenser 4 and the fluorine pump 5 are connected through pipelines (i.e. Figure 1 The first bypass pipe 6 is connected in parallel at the inlet and outlet of the compressor 2 , and the second bypass pipe 7 is connected in parallel at the inlet and outlet of the fluorine pump 5 .

[0055] The evaporator 1 is arranged in the first area, the first condenser 3 is arranged in the second area, and the second condenser 4 is arranged in the outdoor environment. It should be noted that the present application can specifically solve the problem of resource waste caused by the completely different temperature requirements in the data center, where the data room needs to be cooled all day and all year round, while the auxiliary room needs to be heated during some periods. That is, the data center is an important scenario for the application of a condensation heat recovery dual-circulation system provided by the present application. At this time, the first area can be specifically the data room in the data center, and the second area can be specifically the auxiliary room in the data center. In the subsequent embodiments, for the convenience of explanation, the application scenario of the data center is also used as an example for explanation. However, it should also be noted that the application scenario of this system is not limited to the data center scenario. This system is applicable to any application scenario that has both cooling and heating requirements, and can bring about the effect of improving energy utilization. And in other application scenarios, the first area is not necessarily the data room, and the second area is not necessarily the auxiliary room.

[0056] exist Figure 1In the diagram, the flow direction of the coolant in some pipes is marked with arrows to indicate the flow direction of the coolant in the condensation heat recovery dual circulation system. At the same time, the inlet and outlet positions of the evaporator 1, the first condenser 3, and the second condenser 4 can be uniquely determined based on the flow direction of the coolant. For example, Figure 1 In the embodiment, the left side of the evaporator 1, the first condenser 3 and the second condenser 4 is the inlet position, and the right side is the outlet position. In addition, the number of the first condenser 3 and the second condenser 4 can be one or more. In particular, when there are multiple auxiliary rooms, at least one first condenser 3 should be provided in each auxiliary room, and the auxiliary rooms can be connected in parallel.

[0057] Based on the condensation heat recovery dual circulation system provided in this embodiment, the data room can realize heat exchange between the low-temperature condensed liquid in the system and the air in the data room through the evaporator 1, and the low-temperature condensed liquid vaporizes and absorbs heat to achieve a cooling effect. The heat absorbed in the data room circulates in the system through the coolant, and can be released in the auxiliary room and / or the outdoor environment through the first condenser 3 and / or the second condenser 4, which plays a heating role for the auxiliary room.

[0058] It should also be noted that the system uses a dual circulation device of compressor 2 and fluorine pump 5 to provide power for the circulation of the coolant in the system. When compressor 2 is working and fluorine pump 5 is turned off, that is, the system is working in compressor mode, at this time, the cooling (for data room) and heating effects (for auxiliary room) of the system are better. In addition, although the fluorine pump 5 is equivalent to a circuit break when the fluorine pump 5 stops working, the system has a second bypass pipe 7 in parallel at the inlet and outlet of the fluorine pump 5, so that even if the fluorine pump 5 stops working, the coolant can form a loop through the second bypass pipe 7 to complete the circulation in the system. Similarly, when compressor 2 is turned off and fluorine pump 5 is working, that is, the system is working in fluorine pump mode, at this time, the system has a better energy-saving effect under the premise of ensuring a certain cooling and heating capacity. In addition, although the compressor 2 is also equivalent to a circuit break when the compressor 2 stops working, the system also has a first bypass pipe 6 in parallel at the inlet and outlet of the compressor 2, so that even if the compressor 2 stops working, the coolant can form a loop through the first bypass pipe 6 to complete the circulation in the system. Based on the above settings, the system can freely switch between compressor mode and fluorine pump mode according to actual scene requirements, thereby flexibly controlling the system's working mode to adapt to different actual needs.

[0059] As can be seen from the above, the condensation heat recovery dual circulation system provided by the present application is provided with another condenser (i.e., the first condenser 3) in the second area on the basis of utilizing the natural cold source, so that the heat recovered in the first area is reused and released in the second area, which not only realizes the cooling and cooling of the first area but also realizes the heating and heating of the second area, greatly improving the energy utilization rate, thereby reducing the power consumption. At the same time, the system is also a dual-power circulation system of a fluorine pump 5 and a compressor 2. The first bypass pipe 6 and the second bypass pipe 7 ensure that the circulation loop is still unobstructed when either the fluorine pump 5 or the compressor 2 works alone, so that the system has two working modes: compressor mode and fluorine pump mode. The compressor mode has good cooling and heating effects, and the fluorine pump mode has good energy-saving effects. Therefore, the system can flexibly switch its own working mode according to different actual application scenarios to adapt to different work needs.

[0060] On the other hand, the condensation heat recovery dual circulation system provided in the above embodiment is only a basic implementation scheme, and the present application does not limit the condensation heat recovery dual circulation system to have more components to achieve other functions. In a possible embodiment, Figure 1 As shown, the above-mentioned condensation heat recovery dual circulation system also includes: a controller, a first temperature sensor 8 and a second temperature sensor 9.

[0061] The first temperature sensor 8 is arranged in the first area, and the second temperature sensor 9 is arranged in the outdoor environment. The controller is connected with the first temperature sensor 8, the second temperature sensor 9, the controlled end of the compressor 2 and the controlled end of the fluorine pump 5, and is used to control the condensation heat recovery dual circulation system to work in the compressor mode or the fluorine pump mode according to the temperature values ​​collected by the first temperature sensor 8 and the second temperature sensor 9.

[0062] It should be noted that the controller can be implemented by a device with control function such as a single chip microcomputer, a programmable logic controller (PLC), etc. This embodiment does not limit this and can be selected according to the actual control requirements of the compressor 2 and the fluorine pump 5.

[0063] For the first temperature sensor 8 and the second temperature sensor 9, this embodiment only requires that the first temperature sensor 8 is set in the first area to collect the room temperature in the first area, and the second temperature sensor 9 is set in the outdoor environment to collect the outdoor temperature. There is no restriction on the specific setting position, setting quantity, sensor model, etc. of the first temperature sensor 8 and the second temperature sensor 9, which can be freely set according to actual needs.

[0064] In this embodiment, the controller is responsible for switching control of whether the system works in compressor mode or fluorine pump mode. The controller collects the room temperature and outdoor temperature of the first area (such as a data room) through the first temperature sensor 8 and the second temperature sensor 9, and determines whether the system works in compressor mode or fluorine pump mode based on the two collected temperature values. Among them, the specific working mode switching control logic will be further explained in the subsequent embodiment of a condensation heat recovery dual-circulation control method, which will not be repeated here.

[0065] Based on the settings of the first temperature sensor 8, the second temperature sensor 9 and the controller, this embodiment can judge the cooling demand of the current first area based on the room temperature and outdoor temperature of the data room, so as to switch different working modes according to different cooling needs. If the cooling requirement is high, it switches to the compressor mode to ensure that the equipment in the data room is not damaged by overheating. If the cooling requirement is low, it switches to the fluorine pump mode to improve the power utilization rate while ensuring a certain cooling capacity, bringing better energy saving effect.

[0066] On the other hand, this embodiment also provides another possible embodiment, such as Figure 1 As shown, the system further includes: a third temperature sensor 10 , a third bypass pipe 11 , a first electric two-way valve 12 and a second electric two-way valve 13 .

[0067] Among them, the third temperature sensor 10 is arranged in the second area; the third bypass pipe 11 is connected in parallel at the inlet and outlet of the first condenser 3; the first electric two-way valve 12 is arranged at the inlet of the first condenser 3, and the second electric two-way valve 13 is arranged at the third bypass pipe 11; the third temperature sensor 10, the controlled end of the first electric two-way valve 12 and the controlled end of the second electric two-way valve 13 are connected to the controller.

[0068] The controller is also used to control the switching state of the first electric two-way valve 12 and the second electric two-way valve 13 according to the temperature value collected by the third temperature sensor 10 to select the branch where the first condenser 3 is located or the branch where the third bypass pipe 11 is located.

[0069] The setting principle of the third bypass pipe 11 in this embodiment is the same as that of the first bypass pipe 6 and the second bypass pipe 7 in the above embodiment, and it also serves as another channel when the parallel device (i.e., the first condenser 3) is not working to ensure that the circulation loop is not disconnected. Further, in this embodiment, the switch state of the two parallel branches where the first condenser 3 and the third bypass pipe 11 are located is controlled by the first electric two-way valve 12 and the second electric two-way valve 13. When the first condenser 3 is working, the controller controls the first electric two-way valve 12 to open and the second electric two-way valve 13 to close, thereby selecting the branch where the first condenser 3 is located and shutting off the third bypass pipe 11, ensuring that the coolant flows through the first condenser 3 to provide heating conditions. When the first condenser 3 is not working, the controller controls the first electric two-way valve 12 to close and the second electric two-way valve 13 to open, thereby selecting the third bypass pipe 11 and shutting off the branch where the first condenser 3 is located. The coolant flowing out of the evaporator 1 can flow to the second condenser 4 through the third bypass pipe 11 to achieve heat release and ensure the realization of the thermal cycle.

[0070] In other words, the implementation scheme provided in this embodiment supports the first condenser 3 set in the second area to be turned off and not run. When the first condenser 3 is turned off, the coolant can still circulate through the third bypass pipe 11, ensuring that the heat absorbed in the first area can be released in the outdoor environment to ensure thermal circulation. The free control of the switch of the first condenser 3 enables the system to work not only in application scenarios such as winter when auxiliary rooms need to be heated, but also when the second area does not need to be heated, the first condenser 3 can be turned off to avoid excessive temperature in the second area, thereby broadening the application scenarios of the system.

[0071] On the other hand, this embodiment also provides a further implementation scheme based on the above embodiment, such as Figure 1 As shown, the system further includes: a first one-way valve 14 , a second one-way valve 15 and a third one-way valve 16 .

[0072] The first one-way valve 14 is arranged at the first bypass pipe 6 , the second one-way valve 15 is arranged at the second bypass pipe 7 , and the third one-way valve 16 is arranged at the outlet of the first condenser 3 .

[0073] Specifically, one of the purposes of setting the above three one-way valves is to prevent the coolant in the pipeline from flowing back. The difference is that since the compressor 2 and the fluorine pump 5 are equivalent to being disconnected when they stop working, there will be no backflow phenomenon in the branch where they are located at this time, so the corresponding first one-way valve 14 and the second one-way valve 15 are arranged in another branch in parallel, that is, the first bypass pipe 6 and the second bypass pipe 7. However, for the first condenser 3, it does not have the above characteristics, and the first electric two-way valve 12 is arranged at the inlet of the first condenser 3 instead of the outlet, and has no blocking effect on the coolant flowing back from the outlet, so the third one-way valve 16 is specifically arranged at the outlet of the first condenser 3 instead of being arranged at the third bypass pipe 11 like the first one-way valve 14 and the second one-way valve 15.

[0074] Based on the setting of the one-way valve in this embodiment, it is ensured that the three components of the system in the data room, auxiliary room and outdoor environment can all achieve the effect of preventing backflow, avoiding damage to system components and other irreversible consequences caused by the backflow of coolant.

[0075] On the other hand, this embodiment also provides another possible embodiment, such as Figure 1 As shown, the system further includes: a first fan 17 , a second fan 18 , a first pressure sensor 19 and a second pressure sensor 20 .

[0076] The first fan 17 is disposed at the first condenser 3 , the second fan 18 is disposed at the second condenser 4 , the first pressure sensor 19 is disposed at the outlet of the first condenser 3 , and the second pressure sensor 20 is disposed at the outlet of the second condenser 4 .

[0077] The first fan 17, the second fan 18, the first pressure sensor 19 and the second pressure sensor 20 are connected to the controller, and the controller is also used to: control the rotation speed of the first fan 17 according to the pressure value collected by the first pressure sensor 19, and control the rotation speed of the second fan 18 according to the pressure value collected by the second pressure sensor 20.

[0078] In this embodiment, the heating effect of the first condenser 3 and the second condenser 4 is enhanced by the first fan 17 and the second fan 18. In addition, corresponding pressure sensors are also provided at the outlets of the first condenser 3 and the second condenser 4. The outlet pressures of the first condenser 3 and the second condenser 4 are collected by the pressure sensors, so that the controller can know the flow rate of the coolant flowing through the first condenser 3 and the second condenser 4, and accordingly control the rotation speeds of the first fan 17 and the second fan 18, thereby bringing better heating effect.

[0079] On the other hand, this embodiment also provides another possible implementation scheme, such as Figure 1As shown, the system further includes: a throttling device 21 , which is arranged at the inlet of the evaporator 1 .

[0080] The throttling device 21 is a branch of the flow meter, and is arranged at the inlet of the evaporator 1 to collect the inlet flow of the evaporator 1, thereby providing data support for the operation of the evaporator 1 and other components in the system. For example, for the controller provided in the above embodiment, the throttling device 21 can be connected to the controller to provide flow information at the inlet of the evaporator 1, and the controller is then connected to the controlled end of the evaporator 1 to issue corresponding control instructions to the evaporator 1 according to the flow rate information collected by the throttling device 21, thereby controlling the working state or operating parameters of the evaporator 1, etc., to achieve a better refrigeration effect.

[0081] In the above embodiment, a condensation heat recovery dual circulation system is described in detail. The present application also provides an embodiment corresponding to a condensation heat recovery dual circulation control method. It should be noted that the condensation heat recovery dual circulation control method provided in this embodiment is applied to the condensation heat recovery dual circulation system provided in any of the above embodiments, such as Figure 2 As shown, the method includes:

[0082] S11: Acquire temperature values ​​of the outdoor environment and the first area.

[0083] S12: Determine whether the temperature difference between the outdoor environment and the first area is greater than a preset switching temperature difference; if so, go to step S13; if not, go to step S14.

[0084] S13: Turn on the fluorine pump and turn off the compressor.

[0085] S14: Turn on the compressor and turn off the fluorine pump.

[0086] In combination with some embodiments of the above-mentioned condensation heat recovery dual-circulation system, it can be seen that a condensation heat recovery dual-circulation control method provided in this embodiment is to realize the switching control of the system working in the compressor mode or the fluorine pump mode. Specifically, the temperature value of the outdoor environment is T1, the temperature value of the first area is T2, and the switching temperature difference t0 is pre-established, then there is a judgment on whether T1-T2 is greater than t0; if T1-T2>t0, the system operates in the fluorine pump mode; if T1-T2≤t0, the system operates in the compressor mode.

[0087] It should also be noted that the temperature acquisition in the above step S11 can be achieved by the first temperature sensor and the second temperature sensor provided in the above system partial embodiment. Correspondingly, steps S11 to S14 of the method can be achieved by the controller provided in the same embodiment.

[0088] In addition, it is not difficult to know that the operation of the condensation heat recovery dual-cycle system is a continuous process, and the control of the working mode needs to be carried out at any moment during the operation. Therefore, the above steps S11 to S14 of this method are not only carried out once during the operation of the condensation heat recovery dual-cycle system, but are carried out periodically and repeatedly. The cycle length can be freely determined according to actual control needs to meet the control needs during the long-term operation of the condensation heat recovery dual-cycle system.

[0089] This embodiment provides a simple but effective control logic for switching the working mode of the system. The load condition of the first area is determined based on the temperature difference between the outdoor environment and the data room. When T1 - T2 > t0, it indicates that the load of the first area is small at this time, and the condensation heat recovery dual-cycle system is controlled to operate in the more energy-saving fluorine pump mode. When T1 - T2 ≤ t0, it indicates that the load of the first area is large at this time, and the condensation heat recovery dual-cycle system is controlled to operate in the compressor mode with better refrigeration effect. The control logic for switching the working mode provided by this embodiment is simple and efficient, and can realize automatic control of the system working mode switching, ensuring that the condensation heat recovery dual-cycle system can operate in a more suitable working mode in different application scenarios, bringing better refrigeration and energy-saving effects comprehensively.

[0090] On the other hand, on the basis of the above embodiment, this embodiment also provides another possible implementation. After step S14, this method further includes:

[0091] S15: Determine whether the temperature difference between the outdoor environment and the temperature value of the first area is less than the difference between the switching temperature difference and the preset first dead band. If so, go to step S13.

[0092] That is, this embodiment provides another control logic for switching the condensation heat recovery dual-cycle system from the fluorine pump mode to the compressor mode. On the basis of comparing the magnitude relationship between T1 - T2 and t0 in step S12 of the above embodiment, the first dead band t1 is introduced. That is, when the condensation heat recovery dual-cycle system first judges its working mode, it operates in the fluorine pump mode when T1 - T2 > t0, and operates in the compressor mode when T1 - T2 ≤ t0. However, when the condensation heat recovery dual-cycle system enters the fluorine pump mode, it needs T1 - T2 < t0 - t1 to exit the fluorine pump mode and operate in the compressor mode. Among them, the specific value of the first dead band t1 can be freely set according to actual needs. In a possible embodiment, the first dead band t1 can be 2°C. The purpose of introducing the first dead band in this embodiment is to prevent the condensation heat recovery dual-cycle system from frequently switching between the fluorine pump mode and the compressor mode when the temperature changes between the first area and the outdoor environment are relatively frequent, thereby affecting the refrigeration and heating effects of the system and even affecting the service life.

[0093] On the other hand, it can be seen from the above embodiments of the condensation heat recovery dual circulation system that in some embodiments, the condensation heat recovery dual circulation system can also freely control whether the first condenser is working to meet the different heating needs of the auxiliary room in different scenarios. In view of this, this embodiment also provides a control logic for whether the first condenser is working. After steps S13 and S14, the method further includes:

[0094] S21: Obtain the temperature value of the second area.

[0095] S22: Determine whether the temperature value of the second area is less than a preset temperature setting value; if so, go to step S23; if not, go to step S24.

[0096] S23: Control the first condenser to enter an operating state to release heat to the second region.

[0097] S24: Control the first condenser to enter a standby or shutdown state.

[0098] It is not difficult to see from the above steps that this embodiment determines whether the first condenser is working based on the size relationship between the actual temperature value T3 of the second area and the temperature setting value T0. Specifically, when T3<T0, it means that the actual temperature value T3 of the second area has not reached the temperature setting value T0 expected by the user, and heating is required at this time, that is, the first condenser needs to be turned on for heating. When T3≥T0, it means that the actual temperature value T3 of the second area has reached the temperature setting value T0 expected by the user, and heating is not required at this time, so the first condenser is turned off.

[0099] In addition, the acquisition of the actual temperature value T3 of the second area can be realized by the third temperature sensor provided in the above-mentioned condensation heat recovery dual circulation system. Accordingly, steps S21 to S24 provided in this embodiment can be realized by the controller.

[0100] It can be seen that this embodiment also provides a simple but effective control logic for the working state of the first condenser. Based on the actual temperature control needs of the second area, it is decided whether to turn on or off the first condenser, thereby realizing automatic switch control of the first condenser, and effectively ensuring the heating effect and efficiency of the condensation heat recovery dual circulation system.

[0101] In addition, in order to avoid frequent switching of the first condenser between the on and off states, this embodiment also provides a corresponding implementation scheme. After step S23, the above method further includes:

[0102] S25: Determine whether the temperature value of the second area is greater than the difference between the temperature setting value and the preset second hysteresis. If so, go to step S24.

[0103] Similarly to the switching control logic between the fluorine pump mode and the compressor mode provided in the above embodiments, a second dead zone t2 is introduced in this embodiment to avoid frequent switching of the first condenser. The specific value of the second dead zone t2 is not limited in this embodiment and may be equal to or different from the above first dead zone t1. In a possible embodiment, the second dead zone t2 is 3°C.

[0104] As can be seen from the above, based on the first condenser switching control logic provided in this embodiment, when the first condenser first determines its switching state, it is turned on when T3 < T0 and turned off when T3 ≥ T0. However, after the first condenser is turned on, it is necessary for T3 > T0 + t2 to turn off the first condenser. The purpose of introducing the second dead zone t2 in this embodiment is to prevent the first condenser from frequently switching when the temperature in the second area changes frequently, thereby affecting the heating effect and even the service life.

[0105] Finally, integrating the implementation schemes provided in the above method embodiments, the flow of a condensing heat recovery dual-cycle control method provided in this application is as Figure 3 shown:

[0106] First, corresponding to the above step S12, determine whether the condensing heat recovery dual-cycle system initially operates in the compressor mode or the fluorine pump mode according to the magnitude relationship between the temperature difference T1 - T2 between the indoor and outdoor of the first area and the preset switching temperature difference t0. Regardless of the operating mode, then corresponding to the above step S22, make the first judgment on whether the first condenser needs to be turned on or off, and determine whether the first condenser is turned on according to the magnitude relationship between the actual temperature T3 of the second area and the temperature set value T0. Thus, a complete control logic cycle is completed. Based on the fans and pressure sensors provided in some embodiments of the above system, the controller can control the rotation speeds a1 and a2 of the corresponding fans based on the pressure values P1 and P2 collected by the pressure sensor, thereby realizing the complete control of the condensing heat recovery dual-cycle system.

[0107] After that, that is, corresponding to the subsequent working mode switching control and the first condenser switching control during the continuous operation of the condensing heat recovery dual-cycle system. If the condensing heat recovery dual-cycle system operates in the fluorine pump mode, it is necessary to satisfy T1 - T2 < t0 - t1 to exit the fluorine pump mode and enter the compressor mode to avoid frequent switching of the working mode. If the first condenser is turned on, it is necessary to satisfy T3 > T0 + t2 to turn off the first condenser to avoid frequent switching of the first condenser. After that, the condensing heat recovery dual-cycle system continuously cycles in the above control logic to realize the switching control of the working mode and the switching state of the first condenser.

[0108] The above is a detailed introduction to a condensing heat recovery dual circulation system and control method provided by the present application. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can refer to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the present application.

[0109] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A condensation heat recovery double circulation system, characterized in that: include: An evaporator, a compressor, a first condenser, a second condenser, a fluorine pump, a first bypass pipe and a second bypass pipe; Wherein, the evaporator, the compressor, the first condenser, the second condenser and the fluorine pump are sequentially connected in series through pipelines to form a circulation loop; the first bypass pipe is connected in parallel at the inlet and outlet of the compressor, and the second bypass pipe is connected in parallel at the inlet and outlet of the fluorine pump; The evaporator is disposed in a first region, the first condenser is disposed in a second region, and the second condenser is disposed in an outdoor environment.

2. The condensation heat recovery dual circulation system according to claim 1 is characterized in that: Also includes: a controller, a first temperature sensor and a second temperature sensor; Wherein, the first temperature sensor is arranged in the first area, and the second temperature sensor is arranged in an outdoor environment; The controller is connected to the first temperature sensor, the second temperature sensor, the controlled end of the compressor and the controlled end of the fluorine pump, and is used to control the condensation heat recovery dual circulation system to operate in compressor mode or fluorine pump mode according to the temperature values ​​collected by the first temperature sensor and the second temperature sensor.

3. The condensation heat recovery dual circulation system according to claim 2 is characterized in that: Also includes: a third temperature sensor, a third bypass pipe, a first electric two-way valve and a second electric two-way valve; Wherein, the third temperature sensor is arranged in the second area; The third bypass pipe is connected in parallel at the inlet and outlet of the first condenser; The first electric two-way valve is arranged at the inlet of the first condenser, and the second electric two-way valve is arranged at the third bypass pipe; The third temperature sensor, the controlled end of the first electric two-way valve and the controlled end of the second electric two-way valve are connected to the controller; The controller is also used to control the switching states of the first electric two-way valve and the second electric two-way valve according to the temperature value collected by the third temperature sensor to select the branch where the first condenser is located or the branch where the third bypass pipe is located.

4. The condensation heat recovery dual circulation system according to claim 3 is characterized in that: Also includes: a first one-way valve, a second one-way valve and a third one-way valve; Wherein, the first one-way valve is arranged at the first bypass pipe, the second one-way valve is arranged at the second bypass pipe, and the third one-way valve is arranged at the outlet of the first condenser.

5. The condensation heat recovery dual circulation system according to claim 2 is characterized in that: Also includes: a first fan, a second fan, a first pressure sensor, and a second pressure sensor; Wherein, the first fan is arranged at the first condenser, the second fan is arranged at the second condenser, the first pressure sensor is arranged at the outlet of the first condenser, and the second pressure sensor is arranged at the outlet of the second condenser; The first fan, the second fan, the first pressure sensor and the second pressure sensor are connected to the controller, and the controller is also used to: control the speed of the first fan according to the pressure value collected by the first pressure sensor, and control the speed of the second fan according to the pressure value collected by the second pressure sensor.

6. The condensation heat recovery dual circulation system according to any one of claims 1 to 5, characterized in that: Also includes: Throttling device; The throttling device is arranged at the inlet of the evaporator.

7. A condensation heat recovery double cycle control method, characterized in that: The condensation heat recovery dual circulation system as claimed in any one of claims 1 to 6 comprises: Obtain temperature values ​​of the outdoor environment and the first area; Determine whether the difference between the temperature value of the outdoor environment and the temperature value of the first area is greater than a preset switching temperature difference; If yes, turn on the fluorine pump and turn off the compressor; If not, start the compressor and close the fluorine pump.

8. The condensation heat recovery dual cycle control method according to claim 7, characterized in that: After the steps of starting the fluorine pump and shutting down the compressor, the method further comprises: Determine whether the difference between the temperature value of the outdoor environment and the temperature value of the first area is less than the difference between the switching temperature difference and a preset first hysteresis; If so, turn on the compressor and turn off the fluorine pump.

9. The condensation heat recovery dual cycle control method according to claim 7, characterized in that: After the steps of starting the fluorine pump and shutting down the compressor, and the steps of starting the compressor and shutting down the fluorine pump, the method further comprises: Obtaining the temperature value of the second area; Determining whether the temperature value of the second area is less than a preset temperature setting value; If yes, controlling the first condenser to enter an operating state to release heat to the second region; If not, the first condenser is controlled to enter a standby or closed state.

10. The condensation heat recovery dual cycle control method according to claim 9, characterized in that: After the step of controlling the first condenser to enter an operating state to release heat to the second region, the method further includes: Determine whether the temperature value of the second area is greater than the difference between the temperature setting value and a preset second hysteresis; If so, the first condenser is controlled to enter a standby or closed state.

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