Heat exchange system, refrigeration equipment and control method

Abstract

The present application provides a heat exchange system, a refrigeration device, and a control method. The heat exchange system is applied to a refrigeration device including an air conditioner. The heat exchange system includes a heat exchanger, a first heat exchange cycle, and a second heat exchange cycle. The heat exchanger has a first flow channel and a second flow channel, and the second flow channel is suitable for connecting to the air conditioner; the outlet end of the cooling water tower, the first pipe, the first flow channel, the second pipe, and the inlet end of the cooling water tower are connected in sequence, the first switch valve controls the on-off of the first pipe, and the second switch valve controls the on-off of the second pipe; the third pipe and the fourth pipe are respectively connected to the two ends of the first flow channel, and the ends of the third pipe and the fourth pipe away from the first flow channel are respectively connected to the outlet end and the inlet end of the cold source, the third switch valve controls the on-off of the third pipe, and the fourth switch valve controls the on-off of the fourth pipe. The heat exchange system can choose to use the first heat exchange cycle or the second heat exchange cycle according to demand, so as to meet the different needs of energy saving and efficient refrigeration.

Description

Technical Field

[0001] The present application relates to the field of air-conditioning technology, and in particular to a heat exchange system, refrigeration equipment and control method. Background Art

[0002] With the advent of the 5G era and the rapid development of data centers, energy conservation requirements are becoming increasingly stringent. Water-fluorine heat pipe air conditioners, which use chilled water from a chiller as a cooling medium, are commonly used to cool data centers.

[0003] At present, water-fluorine conversion heat pipe air conditioners require a cold source to supply chilled water as a cooling medium all year round. With the introduction of energy-saving policies for data centers, water-fluorine conversion heat pipe air conditioners are also facing challenges. Summary of the Invention

[0004] The purpose of this application is to provide a heat exchange system, refrigeration equipment and control method to improve at least one of the above technical problems. This application achieves the above purpose through the following technical solutions.

[0005] In a first aspect, an embodiment of the present application provides a heat exchange system for use in a refrigeration device including an air conditioner, the heat exchange system comprising a heat exchanger, a first heat exchange cycle, and a second heat exchange cycle. The heat exchanger comprises a first flow channel and a second flow channel, the second flow channel being adapted to be connected to the air conditioner; the first heat exchange cycle comprising a cooling water tower, a first pipe, a second pipe, a first switch valve, and a second switch valve, wherein the outlet of the cooling water tower, the first pipe, the first flow channel, the second pipe, and the inlet of the cooling water tower are sequentially connected; the first switch valve is connected to the first pipe and controls the on / off of the first pipe; the second switch valve is connected to the second pipe and controls the on / off of the second pipe; the second heat exchange cycle comprises a third pipe, a fourth pipe, a third switch valve, and a fourth switch valve, wherein the third pipe and the fourth pipe are connected to both ends of the first flow channel, respectively; the ends of the third pipe and the fourth pipe facing away from the first flow channel are connected to the outlet and inlet of a cold source, respectively; the third switch valve is connected to the third pipe and controls the on / off of the third pipe; the fourth switch valve is connected to the fourth pipe and controls the on / off of the fourth pipe.

[0006] In one embodiment, the heat exchange system also includes a refrigeration cycle, which includes a fifth pipe, a sixth pipe and a liquid storage tank. The fifth pipe and the sixth pipe are respectively connected to the second flow channel, and the ends of the fifth pipe and the sixth pipe facing away from the second flow channel are respectively connected to the inlet and outlet ends of the air conditioner; the liquid storage tank is connected to the fifth pipe, the inlet end of the liquid storage tank is connected to the second flow channel, and the outlet end of the liquid storage tank is connected to the inlet end of the air conditioner.

[0007] In one embodiment, the refrigeration cycle further includes a first booster pump, which is connected to the fifth pipeline and is located between the outlet end of the liquid storage tank and the inlet end of the air conditioner.

[0008] In one embodiment, the refrigeration cycle further includes a first filter connected to the third pipe, an inlet end of the first filter is connected to an outlet end of the liquid storage tank, and an outlet end of the first filter is connected to the first booster pump.

[0009] In one embodiment, the first heat exchange cycle further includes a second booster pump, which is connected to the first pipeline and is located between the outlet end of the cooling water tower and the first flow channel.

[0010] In one embodiment, the first heat exchange cycle further includes a second filter connected to the first pipeline, an inlet end of the second filter connected to an outlet end of the cooling water tower, and an outlet end of the second filter connected to a second booster pump.

[0011] In a second aspect, an embodiment of the present application provides a refrigeration device, which includes the heat exchange system in any of the above embodiments and an air conditioner, and the air conditioner is connected to the second flow channel.

[0012] In a third aspect, an embodiment of the present application provides a control method, which is applied to the heat exchange system in any of the above embodiments, the method comprising: in response to a first mode signal, controlling the first switch valve and the second switch valve to be in an on state, and controlling the third switch valve and the fourth switch valve to be in an off state; and in response to a second mode signal, controlling the first switch valve and the second switch valve to be in an off state, and controlling the third switch valve and the fourth switch valve to be in an on state.

[0013] In one embodiment, the method further includes: obtaining the ambient temperature; if the ambient temperature is less than or equal to a temperature threshold, issuing a first mode signal; if the ambient temperature is greater than the temperature threshold, obtaining a cooling load demand; if the cooling load demand is less than a load demand threshold, obtaining an adjusted temperature; and if the ambient temperature is less than or equal to the sum of the temperature threshold and the adjusted temperature, issuing a first mode signal.

[0014] In one embodiment, the method further includes: issuing a second mode signal if the cooling load demand is greater than or equal to a load demand threshold; and issuing a second mode signal if the ambient temperature is greater than the sum of a temperature threshold and an adjustment temperature.

[0015] In the heat exchange system, refrigeration equipment and control method provided in the embodiment of the present application, the heat exchange system includes a heat exchanger, a first heat exchange cycle and a second heat exchange cycle, and the heat exchange system can choose to use the first heat exchange cycle or the second heat exchange cycle according to demand. Among them, the first heat exchange cycle includes a cooling water tower, a first pipe and a second pipe, and the outlet end of the cooling water tower, the first pipe, the first flow channel, the second pipe and the inlet end of the cooling water tower are connected in sequence. The second heat exchange cycle includes a third pipe and a fourth pipe, the third pipe and the fourth pipe are connected to the two ends of the first flow channel respectively, and the ends of the third pipe and the fourth pipe away from the first flow channel are connected to the outlet end and the inlet end of the cold source respectively. When the ambient temperature is low, the first switch valve and the second switch valve are connected to the first pipe and the second pipe respectively, and the third switch valve and the fourth switch valve are cut off from the third pipe and the fourth pipe respectively. The heat exchange system uses the first cooling medium provided by the cooling water tower for heat exchange, which helps the heat exchange system to make more full use of the natural cold source and improve the energy saving effect of the heat exchange system. When the ambient temperature is high, the first switch valve and the second switch valve cut off the first pipeline and the second pipeline respectively, and the third switch valve and the fourth switch valve connect the third pipeline and the fourth pipeline respectively. The heat exchange system uses the second cooling medium provided by the cold source for heat exchange, which helps to provide a cooling medium with a lower temperature and improves the cooling effect of the heat exchange system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic structural diagram of a refrigeration device provided in an embodiment of the present application is shown.

[0018] Figure 2 A flow chart of the control method provided in an embodiment of the present application is shown.

[0019] Figure 3 A flow chart of a control method provided in another embodiment of the present application is shown. DETAILED DESCRIPTION

[0020] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application.

[0021] In order to enable those skilled in the art to better understand the present application, 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 those skilled in the art without making creative work are within the scope of protection of this application.

[0022] See also Figure 1 , an embodiment of the present application provides a heat exchange system 10 , which can be applied to a refrigeration device 1 including an air conditioner 50 .

[0023] The heat exchange system 10 includes a heat exchanger 11 , a first heat exchange cycle, and a second heat exchange cycle.

[0024] The heat exchanger 11 has a first flow channel 111 and a second flow channel 113. The first flow channel 111 connects the first heat exchange cycle and the second heat exchange cycle, and the second flow channel 113 is suitable for connecting to the air conditioner 50. The first flow channel 111 and the second flow channel 113 can exchange heat, so that the heat exchanger 11 can realize heat exchange for the air conditioner 50. Specifically, the first heat exchange cycle can include a first cooling medium, the second heat exchange cycle can include a second cooling medium, and the second flow channel 113 can allow a third cooling medium to flow. In this way, the first cooling medium and the third cooling medium can exchange heat within the heat exchanger 11, and the second cooling medium can exchange heat with the third cooling medium within the heat exchanger 11.

[0025] The first cooling medium and the second cooling medium can be the same cooling medium. The medium flowing into the first heat exchange cycle can be referred to as the first cooling medium, and the medium flowing into the second heat exchange cycle can be referred to as the second cooling medium. Both the first cooling medium and the second cooling medium can be liquid cooling media, such as water or other cooling media. The third cooling medium can be a gaseous refrigerant or a liquid refrigerant. In the embodiment of the present application, the third cooling medium can be Freon.

[0026] The heat exchanger 11 may be a plate heat exchanger, a shell and tube heat exchanger, or other heat exchange devices.

[0027] The first heat exchange loop includes a cooling water tower 13, a first pipe 15, and a second pipe 17. The outlet of the cooling water tower 13, the first pipe 15, the first flow channel 111, the second pipe 17, and the inlet of the cooling water tower 13 are sequentially connected. In this way, the cooling water tower 13 can provide a first cooling medium, which can flow within the first heat exchange loop to exchange heat with a third cooling medium in the second flow channel 113.

[0028] The cooling water tower 13 can utilize air to exchange heat with the first cooling medium, thereby reducing the temperature of the first cooling medium, helping to more fully utilize the natural cooling source and improving the energy saving effect of the heat exchange system 10. The specific structure of the cooling water tower 13 can refer to the existing structure and will not be described in detail in this application.

[0029] The first heat exchange cycle also includes a first on-off valve 19 and a second on-off valve 21. The first on-off valve 19 is connected to the first pipe 15 and controls the on-off of the first pipe 15. The second on-off valve 21 is connected to the second pipe 17 and controls the on-off of the second pipe 17. In this way, when the cooling water tower 13 is needed to provide the first cooling medium, the first on-off valve 19 and the second on-off valve 21 are controlled to connect the first pipe 15 and the second pipe 17, respectively. The first cooling medium provided by the cooling water tower 13 can flow to the heat exchanger 11 through the first pipe 15, and exchange heat with the third cooling medium in the second flow channel 113 in the first flow channel 111. After the heat exchange, the first cooling medium flows back to the cooling water tower 13 through the second pipe 17 to be cooled again, thereby forming a heat exchange cycle.

[0030] The second heat exchange cycle includes a third pipe 23 and a fourth pipe 25. The third pipe 23 and the fourth pipe 25 are connected to both ends of the first flow channel 111, and the ends of the third pipe 23 and the fourth pipe 25 facing away from the first flow channel 111 are connected to the outlet and inlet of the cold source, respectively. The cold source can provide a second cooling medium, which can flow within the second heat exchange cycle to exchange heat with the third cooling medium in the second flow channel 113. Using the cold source to provide the second cooling medium helps provide a lower temperature cooling medium, thereby improving the cooling effect of the heat exchange system 10.

[0031] The third pipe 23 and the first pipe 15 may have the same pipe section, and the fourth pipe 25 and the second pipe 17 may also have the same pipe section. The same pipe section may be a water pipe or a water pipe joint, etc.

[0032] The cold source can be a chiller, for example, a refrigeration device or equipment consisting of a compressor, a condenser, an evaporator, a cold storage tank, etc.; the cold source can also be a water tank filled with chilled water; or the cold source can also be other devices or equipment that can provide a low-temperature cooling medium, which is not limited in this application. In addition, the temperature of the second cooling medium provided by the cold source is lower than the temperature of the first cooling medium provided by the cooling water tower 13.

[0033] The second heat exchange cycle also includes a third on-off valve 27 and a fourth on-off valve 29. The third on-off valve 27 is connected to the third pipe 23 and controls the on-off of the third pipe 23. The fourth on-off valve 29 is connected to the fourth pipe 25 and controls the on-off of the fourth pipe 25. In this way, when a cold source is needed to provide a second cooling medium, the third on-off valve 27 and the fourth on-off valve 29 are controlled to open the third pipe 23 and the fourth pipe 25, respectively. As a result, the second cooling medium provided by the cold source can flow to the heat exchanger 11 through the third pipe 23 and exchange heat with the third cooling medium in the second flow channel 113 in the first flow channel 111. After heat exchange, the second cooling medium flows back to the cold source through the fourth pipe 25 to be cooled again, thereby forming a heat exchange cycle.

[0034] The first on-off valve 19, the second on-off valve 21, the third on-off valve 27, and the fourth on-off valve 29 can be electric valves. The heat exchange system 10 can also include a processor, which can be connected to the first on-off valve 19, the second on-off valve 21, the third on-off valve 27, and the fourth on-off valve 29. The connection method can be a signal connection, an electrical connection, etc. The processor can control the above-mentioned on-off valves to be independently turned on and off. For example, the processor can control the conduction and cutoff of the first on-off valve 19, the conduction and cutoff of the second on-off valve 21, the conduction and cutoff of the third on-off valve 27, and the conduction and cutoff of the fourth on-off valve 29.

[0035] Among them, the processor can control the first switch valve 19 and the second switch valve 21 to be turned on, and control the third switch valve 27 and the fourth switch valve 29 to be turned off; the processor can also control the third switch valve 27 and the fourth switch valve 29 to be turned on, and control the first switch valve 19 and the second switch valve 21 to be turned off.

[0036] In the heat exchange system 10 provided in the present application, the heat exchange system 10 includes a heat exchanger 11, a first heat exchange cycle and a second heat exchange cycle. The heat exchange system 10 can choose to use the first heat exchange cycle or the second heat exchange cycle according to demand. Among them, the first heat exchange cycle includes a cooling water tower 13, a first pipe 15 and a second pipe 17, and the outlet end of the cooling water tower 13, the first pipe 15, the first flow channel 111, the second pipe 17 and the inlet end of the cooling water tower 13 are connected in sequence. When the ambient temperature is low, such as in spring, autumn and winter, the first switch valve 19 and the second switch valve 21 respectively connect the first pipe 15 and the second pipe 17, and the third switch valve 27 and the fourth switch valve 29 respectively cut off the third pipe 23 and the fourth pipe 25. The heat exchange system 10 uses the first cooling medium provided by the cooling water tower 13 for heat exchange, which helps the heat exchange system 10 to make more full use of the natural cold source and improve the energy saving effect of the heat exchange system 10.

[0037] The second heat exchange cycle includes a third pipe 23 and a fourth pipe 25. The third pipe 23 and the fourth pipe 25 are connected to both ends of the first flow channel 111, and the ends of the third pipe 23 and the fourth pipe 25 facing away from the first flow channel 111 are connected to the outlet and inlet of the cold source, respectively. When the ambient temperature is high, such as in summer, the third on-off valve 27 and the fourth on-off valve 29 respectively open the third pipe 23 and the fourth pipe 25, while the first on-off valve 19 and the second on-off valve 21 respectively block the first pipe 15 and the second pipe 17. The heat exchange system 10 uses the second cooling medium provided by the cold source for heat exchange, which helps provide a cooler cooling medium and improves the cooling effect of the heat exchange system 10.

[0038] In some embodiments, the heat exchange system 10 may further include a refrigeration cycle, which may include a fifth pipe 31 and a sixth pipe 33. The fifth pipe 31 and the sixth pipe 33 are respectively connected to the second flow channel 113, and the ends of the fifth pipe 31 and the sixth pipe 33 facing away from the second flow channel 113 are respectively connected to the inlet and outlet ends of the air conditioner 50. In this way, a third cooling medium can flow within the refrigeration cycle. After the third cooling medium exchanges heat with the cooling medium in the first flow channel 111 in the second flow channel 113, it flows to the air conditioner 50 through the fifth flow channel and exchanges heat with the outside world through the air conditioner 50, thereby achieving a cooling and cooling effect. After the heat exchange, the third cooling medium flows through the sixth pipe 33 to the second flow channel 113 and continues to exchange heat with the cooling medium in the first flow channel 111, thereby forming a refrigeration cycle. The refrigeration cycle may include a third cooling medium.

[0039] In some embodiments, the refrigeration cycle may further include a liquid storage tank 35, which may be connected to the fifth pipe 31. The inlet of the liquid storage tank 35 is connected to the second flow channel 113, and the outlet of the liquid storage tank 35 is connected to the inlet of the air conditioner 50. In this manner, the third cooling medium condenses into a liquid state after heat exchange in the second flow channel 113 and is stored in the liquid storage tank 35. The liquid refrigerant in the liquid storage tank 35 may flow to the air conditioner 50 under the action of gravity or a pressurizing device.

[0040] Specifically, when the gaseous third cooling medium exchanges heat in the second flow channel 113, the third cooling medium releases heat and condenses into a liquid cooling medium and is stored in the liquid storage tank 35. The liquid cooling medium flows to the air conditioner 50 under the action of gravity or a booster device to exchange heat with the outside world. The liquid cooling medium absorbs heat and evaporates into a gaseous cooling medium. The gaseous cooling medium flows to the second flow channel 113 through the sixth pipe 33 to continue to exchange heat, thereby forming a refrigeration cycle.

[0041] In some embodiments, the refrigeration cycle may further include a first booster pump 37, which is connected to the fifth pipe 31 and located between the outlet of the liquid storage tank 35 and the inlet of the air conditioner 50. In this way, the first booster pump 37 can provide power for the flow of the third cooling medium, accelerate the flow rate of the third cooling medium, reduce the temperature loss caused by heat exchange between the third cooling medium and the outside world due to slow flow, and improve refrigeration efficiency.

[0042] In some embodiments, the refrigeration cycle may further include a first filter 39 connected to the third pipe 23. The inlet of the first filter 39 is connected to the outlet of the liquid storage tank 35, and the outlet of the first filter 39 is connected to the first booster pump 37. In this way, the first filter 39 can filter impurities in the third cooling medium to reduce the problem of pipe blockage caused by excessive impurities.

[0043] In some embodiments, the first filter 39 may be a drying filter.

[0044] In some embodiments, the first heat exchange cycle may further include a second booster pump 41, which is connected to the first pipe 15 and located between the outlet of the cooling water tower 13 and the first flow channel 111. In this way, the second booster pump 41 can provide power for the flow of the first cooling medium, accelerate the flow rate of the first cooling medium, reduce the temperature loss caused by the first cooling medium exchanging heat with the outside due to excessively slow flow, and improve the heat exchange efficiency.

[0045] In some embodiments, the first heat exchange cycle further includes a second filter 43, which is connected to the first pipe 15. The inlet of the second filter 43 is connected to the outlet of the cooling water tower 13, and the outlet of the second filter 43 is connected to the second booster pump 41. In this way, the second filter 43 can filter impurities in the first cooling medium to reduce the problem of pipe blockage caused by excessive impurities.

[0046] The present application also provides a refrigeration device 1, comprising the heat exchange system 10 of any of the aforementioned embodiments and an air conditioner 50, wherein the air conditioner 50 is connected to the second flow channel 113. Specifically, the inlet of the air conditioner 50, the fifth pipe 31, the second flow channel 113, the sixth pipe 33, and the outlet of the air conditioner 50 are sequentially connected. Furthermore, because the refrigeration device 1 includes the heat exchange system 10, the refrigeration device 1 has all the beneficial effects of the heat exchange system 10, which will not be further detailed here.

[0047] The air conditioner 50 may include a throttle valve, an evaporator, a compressor, and other structures. The throttle valve, evaporator, compressor, and second flow channel 113 of the heat exchanger 11 may be connected to form a circulation loop, and the third cooling medium may flow within this circulation loop. The inlet end of the air conditioner 50 may refer to the inlet end of the throttle valve, that is, the fifth pipe 31 connects the second flow channel 113 and the inlet end of the throttle valve respectively; the outlet end of the air conditioner 50 may refer to the outlet end of the compressor, that is, the sixth pipe 33 connects the outlet end of the compressor and the second flow channel 113 respectively. The air conditioner 50 may be an in-row air conditioner, a backplane air conditioner, a room-level air conditioner, a rack-mounted air conditioner, a central air conditioner, or other air conditioner.

[0048] In some embodiments, the number of the air conditioner 50 may be one or more. When the number of the air conditioner 50 is multiple, the multiple air conditioners 50 are connected in parallel between the fifth pipe 31 and the sixth pipe 33 .

[0049] Please continue reading Figure 2 The embodiment of the present application also provides a control method, which is applied to the heat exchange system 10 in any of the above embodiments, and includes step 010 and step 020.

[0050] Step 010: In response to the first mode signal, the first switch valve 19 and the second switch valve 21 are controlled to be in the on state, and the third switch valve 27 and the fourth switch valve 29 are controlled to be in the off state.

[0051] At this time, the first heat exchange cycle is operating, and the first on-off valve 19 and the second on-off valve 21 are both in the on state. The heat exchange system 10 utilizes the first cooling medium provided by the cooling water tower 13 to exchange heat. The first cooling medium can flow along the first heat exchange cycle to exchange heat with the third heat exchange medium in the second flow channel 113. This helps the heat exchange system 10 more fully utilize the natural cooling source and improves the energy saving effect of the heat exchange system 10. At this time, the heat exchange system 10 operates in the natural cooling mode.

[0052] Step 020: In response to the second mode signal, the first switch valve 19 and the second switch valve 21 are controlled to be in the cut-off state, and the third switch valve 27 and the fourth switch valve 29 are controlled to be in the on state.

[0053] At this time, the second heat exchange cycle is operating, and the third on-off valve 27 and the fourth on-off valve 29 are both in the on state. The heat exchange system 10 uses the second cooling medium provided by the cold source to exchange heat. The second cooling medium can flow along the second heat exchange cycle to exchange heat with the third heat exchange medium in the second flow channel 113, which helps to improve the cooling effect of the heat exchange system 10. At this time, the heat exchange system 10 operates in the mechanical cooling mode.

[0054] In some embodiments, the control method further includes: if the cooling water tower 13 is working, controlling the cold source to stop working.

[0055] In some embodiments, the control method further includes: if the cold source is working, controlling the cooling water tower 13 to stop working.

[0056] In some embodiments, the first mode signal and the second mode signal may be generated according to a user input operation.

[0057] For example, the heat exchange system 10 may be provided with a touch screen display that can display functions such as a natural cooling mode option and a mechanical cooling mode option. When the user requires the heat exchange system 10 to operate in the natural cooling mode, the user can touch the natural cooling mode option to trigger and generate a first mode signal; when the user requires the heat exchange system 10 to operate in the mechanical cooling mode, the user can touch the mechanical cooling mode option to trigger and generate a second mode signal.

[0058] In addition to being able to receive user input via a touchscreen display, the heat exchange system 10 can also receive user input via buttons. For example, the heat exchange system 10 can be provided with a natural cooling button and a mechanical cooling button. When the user requires the heat exchange system 10 to operate in natural cooling mode, the user can press the natural cooling button to trigger and generate a first mode signal; when the user requires the heat exchange system 10 to operate in mechanical cooling mode, the user can press the mechanical cooling button to trigger and generate a second mode signal.

[0059] The heat exchange system 10 may also be provided with a communication module, which may be communicatively connected to a user's terminal so that the user may trigger and generate the first mode signal and the second mode signal through application software associated with the heat exchange system 10 .

[0060] The first mode signal and the second mode signal may also be generated according to the ambient temperature.

[0061] For details, please refer to Figure 3 In some embodiments, the method may further include step 110 , step 120 , step 130 , step 140 and step 150 .

[0062] Step 110: Acquire the ambient temperature.

[0063] In some embodiments, the ambient temperature may be a wet-bulb temperature or a dry-bulb temperature. In the embodiments of the present application, the ambient temperature is a wet-bulb temperature.

[0064] In some embodiments, the ambient temperature can be obtained via a temperature detector. For example, the heat exchange system 10 may further include a temperature detector for detecting the ambient temperature. The temperature detector may be connected to the processor via a signal connection, an electrical connection, or the like. The temperature detector may be a thermometer, a temperature sensor, or the like.

[0065] Step 120: If the ambient temperature is less than or equal to the temperature threshold, issue a first mode signal.

[0066] In some embodiments, the temperature threshold can be preset according to requirements.

[0067] In some embodiments, the processor may be configured to issue a first mode signal.

[0068] When the temperature detector detects that the ambient temperature is less than or equal to the temperature threshold, the processor sends a first mode signal to control the first switch valve 19 and the second switch valve 21 to be turned on, and controls the third switch valve 27 and the fourth switch valve 29 to be turned off. The heat exchange system 10 uses the first cooling medium provided by the cooling water tower 13 for heat exchange, which helps the heat exchange system 10 to make more full use of the natural cold source and improve the energy-saving effect of the heat exchange system 10.

[0069] Step 130: If the ambient temperature is greater than the temperature threshold, obtain the cooling load demand.

[0070] When the ambient temperature is high, in order to improve the energy-saving effect of the heat exchange system 10 and to determine whether the first heat exchange cycle can continue to be used for heat exchange, the processor continues to obtain the cooling load demand.

[0071] In some embodiments, the cooling load requirement can be determined based on the input temperature and the indoor temperature. When the indoor temperature is higher than the input temperature, the cooling load requirement increases. The indoor temperature is the ambient temperature of the space where the air conditioner 50 is located. It is understood that the air conditioner 50 can also be installed outdoors. In this case, the cooling load requirement can be determined based on the input temperature and the outdoor temperature. When the outdoor temperature is higher than the input temperature, the cooling load requirement increases. The embodiments of this application are described using the indoor temperature as the basis.

[0072] In some embodiments, the input temperature may be generated based on a user input operation, such as a touch screen, a button, an application software, etc. in the above examples, which will not be described in detail here.

[0073] Step 140: If the cooling load demand is less than the load demand threshold, obtain an adjustment temperature.

[0074] When the cooling load at the end of the air conditioner 50 is relatively small, in order to improve the energy-saving effect of the heat exchange system 10 and to determine whether the first heat exchange cycle can continue to be used for heat exchange, the processor continues to obtain the adjusted temperature.

[0075] In some embodiments, both the load demand threshold and the adjustment temperature can be preset according to demand.

[0076] Step 150 : If the ambient temperature is less than or equal to the sum of the temperature threshold and the adjusted temperature, issue a first mode signal.

[0077] When the ambient temperature is less than or equal to the sum of the temperature threshold and the adjustment temperature, although the ambient temperature is higher than the temperature threshold at this time, the cooling load demand at this time is less than the load demand threshold, that is, the cooling demand at the end of the air conditioner 50 is relatively small. At this time, the processor sends a first mode signal, and the first heat exchange cycle starts working, which helps the heat exchange system 10 to make more full use of the natural cold source and improve the energy-saving effect of the heat exchange system 10.

[0078] In some embodiments, the method may further include step 160: if the cooling load demand is greater than or equal to a load demand threshold, issuing a second mode signal.

[0079] The method may further include step 170: if the ambient temperature is greater than the sum of the temperature threshold and the adjustment temperature, issuing a second mode signal.

[0080] In some embodiments, the processor may be configured to issue a second mode signal.

[0081] When the cooling load demand is greater than or equal to the load demand threshold, the cooling load demand is high, the processor sends a second mode signal, and the second heat exchange cycle starts working, which helps to improve the heat exchange efficiency, thereby improving the cooling efficiency of the heat exchange system 10.

[0082] When the ambient temperature is greater than the sum of the temperature threshold and the adjustment temperature, the ambient temperature is relatively high, the processor sends a second mode signal, and the second heat exchange cycle starts working, which helps to improve the heat exchange efficiency, thereby improving the cooling efficiency of the heat exchange system 10.

[0083] As an example, the temperature threshold is set to 10°C, the load demand threshold is set to 50%, and the adjustment temperature is set to 3°C.

[0084] When the ambient temperature is less than or equal to 10° C., for example, the ambient temperature is 10° C., 9° C., 6° C., etc., the processor sends a first mode signal.

[0085] When the ambient temperature is greater than 10°C, for example, the ambient temperature is 11°C, 13°C, 18°C, etc., the processor obtains the cooling load demand. If the cooling load demand is greater than or equal to 50%, for example, the cooling load demand is 50%, 53%, 61%, etc., the processor sends a second mode signal; if the cooling load demand is less than 50%, for example, the cooling load demand is 50%, 48%, 39%, etc., the processor obtains the adjusted temperature. When the ambient temperature is less than or equal to the sum of the temperature threshold and the adjusted temperature, for example, the ambient temperature is 13°C, 12°C, 10°C, etc., the processor sends a first mode signal; when the ambient temperature is greater than the sum of the temperature threshold and the adjusted temperature, for example, the ambient temperature is 14°C, 15°C, 17°C, etc., the processor sends a second mode signal.

[0086] As another example, the temperature threshold is set to 5°C, the load demand threshold is set to 80%, and the adjusted temperature is set to 4°C.

[0087] When the ambient temperature is less than or equal to 5° C., for example, the ambient temperature is 5° C., 4° C., 2° C., etc., the processor sends a first mode signal.

[0088] When the ambient temperature is greater than 5°C, for example, the ambient temperature is 6°C, 7°C, 8°C, etc., the processor obtains the cooling load demand. If the cooling load demand is greater than or equal to 80%, for example, the cooling load demand is 81%, 85%, 91%, etc., the processor sends a second mode signal; if the cooling load demand is less than 80%, for example, the cooling load demand is 79%, 78%, 69%, etc., the processor obtains the adjusted temperature. When the ambient temperature is less than or equal to the sum of the temperature threshold and the adjusted temperature, for example, the ambient temperature is 9°C, 8°C, 6°C, etc., the processor sends a first mode signal; when the ambient temperature is greater than the sum of the temperature threshold and the adjusted temperature, for example, the ambient temperature is 10°C, 12°C, 16°C, etc., the processor sends a second mode signal.

[0089] As can be seen from the above example, when the ambient temperature is less than or equal to the temperature threshold, the ambient temperature is relatively low, and the processor issues a first mode signal, which helps the heat exchange system 10 more fully utilize the natural cooling source, thereby improving the energy saving effect of the heat exchange system 10. When the ambient temperature is greater than the temperature threshold, the cooling load demand is less than the load demand threshold, and the ambient temperature is less than or equal to the sum of the temperature threshold and the adjustment temperature, although the ambient temperature is higher than the temperature threshold, the cooling load demand is less than the load demand threshold. At this time, the processor issues the first mode signal, which helps the heat exchange system 10 more fully utilize the natural cooling source, thereby improving the energy saving effect of the heat exchange system 10.

[0090] When the ambient temperature is greater than the temperature threshold and the cooling load demand is greater than or equal to the load demand threshold, the cooling load demand is high, and the processor issues a second mode signal, which helps improve the heat exchange efficiency of heat exchange system 10, thereby improving the cooling efficiency of heat exchange system 10. When the ambient temperature is greater than the temperature threshold, the cooling load demand is less than the load demand threshold, and the ambient temperature is greater than the sum of the temperature threshold and the adjustment temperature, although the cooling load demand is less than the load demand threshold, the ambient temperature is high, and the processor issues a second mode signal, which helps improve the heat exchange efficiency, thereby improving the cooling efficiency of heat exchange system 10.

[0091] In summary, in the heat exchange system 10, refrigeration equipment 1 and control method provided in the embodiment of the present application, the heat exchange system 10 includes a heat exchanger 11, a first heat exchange cycle and a second heat exchange cycle, and the heat exchange system 10 can choose to use the first heat exchange cycle or the second heat exchange cycle according to demand. Among them, the first heat exchange cycle includes a cooling water tower 13, a first pipe 15 and a second pipe 17, and the outlet end of the cooling water tower 13, the first pipe 15, the first flow channel 111, the second pipe 17 and the inlet end of the cooling water tower 13 are connected in sequence. The second heat exchange cycle includes a third pipe 23 and a fourth pipe 25, and the third pipe 23 and the fourth pipe 25 are respectively connected to the two ends of the first flow channel 111, and the ends of the third pipe 23 and the fourth pipe 25 facing away from the first flow channel 111 are respectively connected to the outlet end and the inlet end of the cold source.

[0092] When the ambient temperature is low, the first on-off valve 19 and the second on-off valve 21 respectively connect the first pipe 15 and the second pipe 17, and the third on-off valve 27 and the fourth on-off valve 29 respectively block the third pipe 23 and the fourth pipe 25. The heat exchange system 10 uses the first cooling medium provided by the cooling water tower 13 for heat exchange, which helps the heat exchange system 10 more fully utilize the natural cold source and improves the energy saving effect of the heat exchange system 10. When the ambient temperature is high, the third on-off valve 27 and the fourth on-off valve 29 respectively connect the third pipe 23 and the fourth pipe 25, and the first on-off valve 19 and the second on-off valve 21 respectively block the first pipe 15 and the second pipe 17. The heat exchange system 10 uses the second cooling medium provided by the cold source for heat exchange, which helps provide a lower temperature cooling medium and improves the cooling effect of the heat exchange system 10.

[0093] In this application, the terms "first", "second", etc. are only used to distinguish descriptions and should not be understood as specific or special structures. The descriptions of the terms "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of this application. In this application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this application and the features of the different embodiments or examples, unless they are contradictory.

[0094] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A control method, characterized in that: Applicable to a heat exchange system, the heat exchange system comprising: A heat exchanger having a first flow channel and a second flow channel, wherein the second flow channel is suitable for connecting to an air conditioner; a first heat exchange cycle, comprising a cooling water tower, a first pipe, a second pipe, a first on-off valve, and a second on-off valve, wherein the outlet of the cooling water tower, the first pipe, the first flow channel, the second pipe, and the inlet of the cooling water tower are sequentially connected, the first on-off valve is connected to the first pipe and controls the on-off of the first pipe, and the second on-off valve is connected to the second pipe and controls the on-off of the second pipe; and a second heat exchange cycle, comprising a third pipe, a fourth pipe, a third on-off valve, and a fourth on-off valve, wherein the third pipe and the fourth pipe are respectively connected to both ends of the first flow channel, and ends of the third pipe and the fourth pipe facing away from the first flow channel are respectively connected to the outlet and inlet of the cold source, the third on-off valve is connected to the third pipe and controls the on-off of the third pipe, and the fourth on-off valve is connected to the fourth pipe and controls the on-off of the fourth pipe; The method comprises: In response to a first mode signal, controlling the first switch valve and the second switch valve to be in an on state, and controlling the third switch valve and the fourth switch valve to be in an off state; and In response to a second mode signal, the first switch valve and the second switch valve are controlled to be in a cut-off state, and the third switch valve and the fourth switch valve are controlled to be in a conducting state; Get the ambient temperature; If the ambient temperature is less than or equal to the temperature threshold, sending the first mode signal; If the ambient temperature is greater than the temperature threshold, obtaining a cooling load demand; If the cooling load demand is less than the load demand threshold, obtaining an adjusted temperature; and If the ambient temperature is less than or equal to the sum of the temperature threshold and the adjustment temperature, the first mode signal is issued.

2. The method according to claim 1, characterized in that The method further comprises: If the cooling load demand is greater than or equal to the load demand threshold, issuing the second mode signal; and If the ambient temperature is greater than the sum of the temperature threshold and the adjusted temperature, the second mode signal is issued.

3. The method according to claim 1, characterized in that The heat exchange system also includes a refrigeration cycle, which includes a fifth pipe, a sixth pipe and a liquid storage tank. The fifth pipe and the sixth pipe are respectively connected to the second flow channel, and the ends of the fifth pipe and the sixth pipe facing away from the second flow channel are respectively connected to the inlet and outlet ends of the air conditioner; the liquid storage tank is connected to the fifth pipe, the inlet end of the liquid storage tank is connected to the second flow channel, and the outlet end of the liquid storage tank is connected to the inlet end of the air conditioner.

4. The method according to claim 3, characterized in that The refrigeration cycle further includes a first booster pump connected to the fifth pipeline and located between the outlet end of the liquid storage tank and the inlet end of the air conditioner.

5. The method according to claim 4, characterized in that The refrigeration cycle further includes a first filter connected to the third pipe, an inlet end of the first filter is connected to an outlet end of the liquid storage tank, and an outlet end of the first filter is connected to the first booster pump.

6. The method according to claim 1, characterized in that The first heat exchange cycle further includes a second booster pump, which is connected to the first pipeline and is located between the outlet end of the cooling water tower and the first flow channel.

7. The method according to claim 6, characterized in that The first heat exchange cycle further includes a second filter, which is connected to the first pipeline. The inlet end of the second filter is connected to the outlet end of the cooling water tower, and the outlet end of the second filter is connected to the second booster pump.

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