Machine room air side waste heat recovery system and machine room air side waste heat recovery system control method

Abstract

The invention provides a machine room air side waste heat recovery system, a machine room air side waste heat recovery system control method and a machine room air side waste heat recovery device.The machine room air side waste heat recovery system comprises a first circulation system, a second circulation system and an air heat exchanger, and the air heat exchanger comprises a first heat exchange pipeline and a second heat exchange pipeline; the first circulating system is communicated with the first heat exchange pipeline, the second circulating system is communicated with the second heat exchange pipeline, a first air inlet of the first circulating system is communicated with an indoor target room or the outdoor space, and the indoor space further comprises a machine room. A first air outlet of the first circulating system is communicated with the target room or the machine room, and a second air inlet and a second air outlet of the second circulating system are both communicated with the machine room. In this way, hot air in the machine room can be used for conducting heat exchange on air obtained by the first circulation system, and therefore the utilization rate of the hot air in the machine room is increased.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of infrastructure technology, and in particular to a computer room air-side waste heat recovery system and a computer room air-side waste heat recovery system control method. Background Art

[0002] With the continuous development of electronic technology, electronic devices are increasingly used in people's lives. Currently, data center computer rooms can house multiple electronic devices, which easily generate heat during use. To prevent this heat from accumulating within the computer room, additional heat dissipation devices are typically installed. These heat dissipation devices typically consume electricity, resulting in significant energy consumption. Summary of the Invention

[0003] The embodiments of the present application provide a computer room air-side waste heat recovery system and a computer room air-side waste heat recovery system control method to solve the current problem of high power consumption.

[0004] To solve the above problems, this application is implemented as follows:

[0005] In the first aspect, an embodiment of the present application provides a machine room air-side waste heat recovery device, comprising: a first circulation system, a second circulation system and an air heat exchanger, the air heat exchanger comprising a first heat exchange pipe and a second heat exchange pipe, the first circulation system is connected to the first heat exchange pipe, the second circulation system is connected to the second heat exchange pipe, the first air inlet of the first circulation system is connected to the target room indoors or outdoors, the indoors also includes a machine room, the first air outlet of the first circulation system is connected to the target room or the machine room, and the second air inlet and the second air outlet of the second circulation system are both connected to the machine room.

[0006] In a second aspect, an embodiment of the present application provides a method for controlling a machine room air-side waste heat recovery device, which is applied to the machine room air-side waste heat recovery device described in the first aspect. The method includes:

[0007] Controlling the first circulation system, the second circulation system and the air heat exchanger included in the air side waste heat recovery device of the machine room to be in working state;

[0008] The air obtained by the first circulation system is used to exchange heat with the hot air in the indoor machine room obtained by the second circulation system in the air heat exchanger to obtain heat-exchanged air, and the heat-exchanged air is used to be output to the target room through the first air outlet of the first circulation system.

[0009] In an embodiment of the present application, since the second air inlet and the second air outlet of the second circulation system are both connected to the computer room, the air obtained by the first circulation system can be used to exchange heat with the hot air in the indoor computer room obtained by the second circulation system in an air heat exchanger to obtain heat-exchanged air, and the heat-exchanged air is used to be output to the target room through the first air outlet of the first circulation system. In this way, the hot air in the computer room can be used to exchange heat with the air obtained by the first circulation system, thereby improving the utilization rate of the hot air in the computer room, and there is no need to set up additional heat dissipation devices for the hot air in the computer room, thereby reducing the consumption of electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments of the present application. 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 any creative work.

[0011] Figure 1 This is one of the structural diagrams of the air-side waste heat recovery device for the computer room provided in the embodiment of the present application;

[0012] Figure 2 This is the second structural diagram of the air-side waste heat recovery device for the computer room provided in the embodiment of the present application;

[0013] Figure 3 This is one of the flow charts of the method for controlling the air-side waste heat recovery device of the computer room provided in the embodiment of the present application;

[0014] Figure 4 This is the second flow chart of the control method of the air-side waste heat recovery device of the computer room provided in the embodiment of the present application;

[0015] Figure 5 This is the third structural diagram of the air-side waste heat recovery device for the computer room provided in the embodiment of the present application;

[0016] Figure 6 This is the fourth structural diagram of the air-side waste heat recovery device of the computer room provided in the embodiment of the present application. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0018] The terms "first", "second" etc. in the embodiments of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. In addition, the terms "comprise" and "have" and any deformation thereof are intended to cover non-exclusive inclusions, such as, the process, method, system, product or equipment comprising a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or that are intrinsic to these processes, methods, products or equipment. In addition, "and / or" is used in the present application to represent at least one of connected objects, such as A and / or B and / or C, and represents comprising independent A, independent B, independent C, and A and B all exist, B and C all exist, A and C all exist, and 7 situations that A, B and C all exist.

[0019] See Figure 1 , Figure 1 A schematic diagram of the structure of a machine room air side waste heat recovery device provided in an embodiment of the present application is shown as follows: Figure 1 As shown in the figure, the waste heat recovery device on the air side of the machine room includes:

[0020] A first circulation system 100, a second circulation system 200 and an air heat exchanger 4, the air heat exchanger 4 includes a first heat exchange pipe and a second heat exchange pipe, the first circulation system 100 is connected to the first heat exchange pipe, the second circulation system 200 is connected to the second heat exchange pipe, the first air inlet 1 of the first circulation system 100 is connected to the target room indoors or the outdoor A1, the indoor also includes a machine room 14, the first air outlet 9 of the first circulation system 100 is connected to the target room 15 or the machine room 14, and the second air inlet 12 and the second air outlet 13 of the second circulation system 200 are both connected to the machine room 14.

[0021] The working principle of the embodiment of the present application can be described as follows:

[0022] Since the second air inlet 12 and the second air outlet 13 of the second circulation system 200 are both connected to the machine room 14, the air obtained by the first circulation system 100 can be used to exchange heat with the hot air in the indoor machine room 14 obtained by the second circulation system 200 in the air heat exchanger 4 to obtain heat-exchanged air, and the heat-exchanged air is used to be output to the target room 15 through the first air outlet 9 of the first circulation system 100. In this way, the hot air in the machine room 14 can be used to exchange heat with the air obtained by the first circulation system 100, thereby improving the utilization rate of the hot air in the machine room 14, and there is no need to set up additional heat dissipation devices for the hot air in the machine room 14, thereby reducing the consumption of electricity.

[0023] It should be noted that the machine room air-side waste heat recovery device in the embodiment of the present application can be used in air conditioners, and the recovered heat in the machine room 14 can be used to heat the air obtained by the first circulation system 100, and the air obtained by the above-mentioned first circulation system 100 can be called fresh air. In this way, the utilization rate of the heat in the machine room 14 can be improved, and at the same time, there is no need to set up a heating device separately for the air obtained by the first circulation system 100, thereby reducing energy consumption. The air conditioners in the prior art usually do not have the function of recycling the heat in the machine room 14.

[0024] The positional relationship between the first heat exchange pipe and the second heat exchange pipe is not limited here. Optionally, the first heat exchange pipe and the second heat exchange pipe can be parallel to each other. Optionally, the first heat exchange pipe and the second heat exchange pipe can be arranged perpendicular to each other.

[0025] As an optional implementation, see Figure 1 The first circulation system 100 also includes a first return air valve 2, a cooling module 3, a temperature adjustment module 7 and a first fan 8. The first air inlet 1 is connected to the first heat exchange pipe through the first return air valve 2 and the cooling module 3 in sequence, and the first heat exchange pipe is also connected to the first air outlet 9 through the temperature adjustment module 7 and the first fan 8 in sequence.

[0026] Among them, the cooling module 3 can also be called an evaporative cooling module, and the temperature adjustment module 7 can be called a cooling or heating coil, and the temperature adjustment module 7 can also be called a cooling\heating coil.

[0027] It should be noted that the first fan 8 can be used to provide power for the flow of air, thereby increasing the air flow rate. When the first air inlet 1 is connected to the outdoor A1, the first return air valve 2 can be called the outdoor fresh air valve; when the first air inlet 1 is connected to the indoor room, the first return air valve 2 can be called the indoor return air valve.

[0028] In the embodiment of the present application, the cooling module 3 can cool down the air obtained by the first circulation system 100, and the temperature regulation module 7 can be used to regulate the temperature of the air after heat exchange in the first heat exchange pipe, and the temperature-regulated air is transported to the target room 15 or the machine room 14 through the first fan 8 and the first air outlet 9. In this way, the temperature regulation effect of the air obtained by the first circulation system 100 and the air after heat exchange in the first heat exchange pipe can be enhanced.

[0029] As an optional implementation, see Figure 1The first circulation system 100 also includes a third air inlet 5 and a fresh air valve 6. The third air inlet 5 is connected to the outdoor A1, and the third air inlet 5 is connected to the first connecting port through the fresh air valve 6. The first connecting port is located between the first heat exchange pipe and the temperature adjustment module 7.

[0030] Among them, the third air inlet 5 can also be called an outdoor fresh air inlet, and the fresh air valve 6 can also be called an outdoor fresh air valve. In this way, in the embodiment of the present application, by setting the third air inlet 5 and the fresh air valve 6, the channel for the outdoor air A1 to enter the first circulation system 100 is increased, making it more convenient for the outdoor air A1 to enter the first circulation system 100. At the same time, the amount of outdoor air A1 entering the first circulation system 100 is also increased.

[0031] It should be noted that the air entering the first circulation system 100 from the third air inlet 5 and the air entering the first circulation system 100 from the first air inlet 1 can converge at the first connection port, and then pass through the temperature adjustment module 7 together before entering the machine room 14 or the target room 15, thereby adjusting the temperature in the machine room 14 or the target room 15, that is, enhancing the temperature adjustment effect in the machine room 14 or the target room 15.

[0032] As an optional implementation, see Figure 1 The second circulation system 200 further includes a second fan 11 and a circulation air valve 10 , the second air inlet 12 is connected to the second heat exchange pipe through the second fan 11 , and the second heat exchange pipe is connected to the second air outlet 13 through the circulation air valve 10 .

[0033] The second fan 11 may also be referred to as an indoor-side circulation fan, and the circulation air valve 10 may be referred to as an indoor-side circulation air valve.

[0034] It should be noted that, optionally, the second fan 11 and the first fan 8 are fans provided with variable-frequency drives (VFDs). In this way, the frequencies of the second fan 11 and the first fan 8 can be adjusted, thereby better adjusting the air flow rate.

[0035] In the embodiment of the present application, the second fan 11 can provide power for the air in the machine room 14 to flow in the second circulation system 200, thereby increasing the flow rate of the air in the second circulation system 200. The circulating air valve 10 can adjust the air flow in the second circulation system 200, thereby enhancing the air flow regulation effect.

[0036] As an optional implementation, the target room 15 includes an office or a heat-demanding room, where the heat-demanding room is a room with heating or anti-freezing requirements.

[0037] The types of heat-demanding rooms are not limited here. Optionally, heat-demanding rooms may include battery rooms, diesel generator rooms, water pump rooms, etc.

[0038] In the embodiment of the present application, since the target room 15 includes an office or a heat-demanding room, the diversity of the types of the target room 15 is increased, thereby further expanding the diversity and flexibility of the application scenarios of the machine room wind-side waste heat recovery device in the embodiment of the present application.

[0039] See also Figure 4 , Figure 4 It is a flow chart of the control method of the air-side waste heat recovery device of the computer room provided in the embodiment of the present application. Figure 4 The control method of the equipment room air side waste heat recovery device shown can be applied to the equipment room air side waste heat recovery device described in the above embodiment, that is, the control method of the equipment room air side waste heat recovery device can be executed by the equipment room air side waste heat recovery device, and the equipment room air side waste heat recovery device can be applied to electronic equipment. Figure 4 As shown, the control method of the air-side waste heat recovery device of the machine room may include the following steps:

[0040] Step 401: Control the first circulation system, the second circulation system, and the air heat exchanger included in the air-side waste heat recovery device of the machine room to be in an operating state;

[0041] The air obtained by the first circulation system is used to exchange heat with the hot air in the indoor machine room obtained by the second circulation system in the air heat exchanger to obtain heat-exchanged air, and the heat-exchanged air is used to be output to the target room through the first air outlet of the first circulation system.

[0042] In an embodiment of the present application, the air obtained by the first circulation system is used to exchange heat with the hot air in the indoor machine room obtained by the second circulation system in an air heat exchanger to obtain heat-exchanged air, and the heat-exchanged air is used to be output to the target room through the first air outlet of the first circulation system. In this way, the hot air in the machine room can be used to exchange heat with the air obtained by the first circulation system, thereby improving the utilization rate of the hot air in the machine room and reducing energy consumption.

[0043] As an optional implementation, see Figure 2, the first air inlet of the first circulation system is connected to the outside, the first air outlet of the first circulation system is connected to the machine room, and the control of the first circulation system, the second circulation system and the air heat exchanger included in the wind side waste heat recovery device of the machine room are in working state, including:

[0044] When the outdoor temperature is lower than a first preset temperature, controlling the temperature regulating module included in the first circulation system to be in a state for heating the air obtained by the first circulation system, and controlling the second circulation system and the air heat exchanger to be in an operating state;

[0045] When the outdoor temperature is greater than a first preset temperature and less than a second preset temperature, the cooling module included in the first circulation system is controlled to be in a state for performing current enthalpy treatment on the air obtained by the first circulation system, the second fan included in the second circulation system is controlled to be in an off state, and the air heat exchanger is controlled to be in an operating state;

[0046] When the outdoor temperature is greater than the second preset temperature, the cooling module included in the first circulation system is controlled to be in a closed state, the third air inlet and the temperature adjustment module are controlled to be in an open state, the second fan included in the second circulation system is controlled to be in a closed state, and the air heat exchanger is controlled to be in a working state.

[0047] In this case, the outdoor temperature being less than the first preset temperature can be understood as indicating winter. In this case, the first air inlet of the first circulation system can be connected to the outside, meaning that the air drawn from the outside by the first circulation system is low-temperature air. This low-temperature air can then undergo heat exchange with the hot air drawn from the second circulation system in the air heat exchanger before entering the computer room through the first air outlet of the first circulation system. This achieves winter dew-point air supply to the computer room, raising the temperature in the computer room in winter. At the same time, this utilizes the hot air in the computer room to heat the fresh air in the computer room, reducing energy consumption for processing the outdoor fresh air. The outdoor fresh air can be understood as the air drawn from the outside by the first circulation system. When the outdoor temperature is too low (e.g., below the first preset temperature), the temperature control module can be controlled to operate, thereby heating the air drawn from the first circulation system to achieve winter dew-point air supply to the computer room. Dew-point air supply refers to air that has been cooled to a near-saturation point and then delivered to the room without reheating. This allows the computer room's airside waste heat recovery device to maximize the use of the hot air in the computer room to heat the fresh air that maintains positive pressure in the computer room, reducing energy consumption for heating the fresh air.

[0048] Among them, the situation where the outdoor temperature is greater than the first preset temperature and less than the second preset temperature can be understood as: it is summer outdoors at this time, and the dew point temperature of the outdoor air does not exceed the dew point temperature of the computer room. At this time, the cooling module can be used to perform enthalpy treatment on the air obtained by the first circulation system, thereby reducing the temperature of the outdoor fresh air and realizing dew point air supply to the computer room.

[0049] Among them, the situation where the outdoor temperature is greater than the second preset temperature can be understood as: when it is summer outdoors and the dew point temperature of the outdoor air is higher than the dew point temperature of the computer room, the cooling and cooling module included in the first circulation system is controlled to be in a closed state, the third air inlet and the temperature adjustment module are in an open state, and the second fan included in the second circulation system is controlled to be in a closed state, and the air heat exchanger is controlled to be in a working state. At this time, the outdoor fresh air can be cooled by the temperature adjustment module to realize dew point air supply to the computer room.

[0050] In the implementation manner of the present application, different components of the first circulation system and the second circulation system can be controlled to be in the open state according to different outdoor temperatures, thereby making the machine room air side waste heat recovery device work in different modes, thereby increasing the diversity of the working modes of the machine room air side waste heat recovery device and expanding the application scenarios of the machine room air side waste heat recovery device.

[0051] It should be noted that the switching steps of the working mode of the above-mentioned machine room air side waste heat recovery device can be referred to as follows Figure 3 shown.

[0052] As an optional embodiment, the machine room air-side waste heat recovery device is applied to an air conditioner, and the air conditioner includes at least one of the following: a chilled water type machine room air conditioner, a direct expansion type precision air conditioner, an indirect evaporative cooling air conditioner, and a direct ventilation air conditioner.

[0053] In the embodiment of the present application, the air conditioner includes at least one of the following: a chilled water type computer room air conditioner, a direct expansion type precision air conditioner, an indirect evaporative cooling air conditioner, and a direct ventilation air conditioner. In this way, the application scenarios of the computer room air side waste heat recovery device can be further expanded, that is, the application scope of the computer room air side waste heat recovery device can be further expanded.

[0054] As an optional implementation, see Figure 5 , the target room includes a heat-demanding room, and the first air inlet and the first air outlet of the first circulation system are both connected to the heat-demanding room;

[0055] The controlling of the first circulation system, the second circulation system and the air heat exchanger included in the air side waste heat recovery device of the machine room to be in a working state includes:

[0056] When the outdoor temperature is lower than the third temperature, the first circulation system, the second circulation system and the air heat exchanger are all controlled to be in working state, so that the air in the target room obtained by the first circulation system and the hot air in the machine room obtained by the second circulation system are heat exchanged in the air heat exchanger, and the obtained heat-exchanged air is input into the target room.

[0057] Among them, the heat-demand room can be understood as a room with heating or anti-freeze requirements in winter, and the third air inlet included in the first circulation system can always be in an open state. In this way, the third air inlet can be used as an exhaust air supply port for the heat-demand room.

[0058] In the embodiment of the present application, the outdoor temperature is lower than the third temperature, indicating that the target room has heating or anti-freeze requirements, and thus the air in the target room obtained by the first circulation system and the hot air in the machine room obtained by the second circulation system can be controlled to exchange heat in the air heat exchanger, and the obtained air after heat exchange can be input into the target room. In this way, the hot air in the machine room can be used to heat the air in the target room obtained by the above-mentioned first circulation system, and the heated air can be returned to the target room, so that the temperature of the target room can be maintained at a state greater than the third temperature, that is, the heated air can meet the winter air supply temperature requirement, thereby increasing the temperature in the target room and reducing the energy consumption of heating the air in the target room.

[0059] It should be noted that the target room may be composed of multiple rooms, and the purposes of the multiple rooms may be the same or different, which is not specifically limited here.

[0060] As an optional implementation, see Figure 6 , the target room includes an office, and the first air inlet and the first air outlet of the first circulation system are both connected to the office;

[0061] The controlling of the first circulation system, the second circulation system and the air heat exchanger included in the air side waste heat recovery device of the machine room to be in a working state includes:

[0062] When the outdoor temperature is lower than the fourth temperature, the first circulation system, the second circulation system and the air heat exchanger are all controlled to be in working state, so that the air in the target room obtained by the first circulation system and the hot air in the machine room obtained by the second circulation system are heat exchanged in the air heat exchanger, and the obtained heat-exchanged air is input into the target room.

[0063] Among them, the above-mentioned office can also be called an office area.

[0064] In the embodiment of the present application, the outdoor temperature is lower than the fourth temperature. It can be understood that it is winter at this time and the temperature in the office is relatively low. Therefore, the hot air in the computer room can be used to heat the air in the office, so that the temperature in the office is maintained at a state higher than the fourth temperature, that is, the temperature in the office can meet the requirements of the winter air supply temperature. At the same time, it can also reduce the energy consumption for heating the air in the office.

[0065] It should be noted that the third air inlet included in the first circulation system can be in an open state, so as to meet the requirement of fresh air supply in the office.

[0066] As an optional embodiment, the controlling of the first circulation system, the second circulation system and the air heat exchanger included in the air-side waste heat recovery device of the machine room to be in an operating state further includes:

[0067] When the outdoor temperature is greater than the fifth temperature, the cooling module included in the first circulation system, the components of the second circulation system except the second fan, and the air heat exchanger are controlled to be in working state, and the second fan is controlled to be in a stopped working state.

[0068] In the embodiment of the present application, when the outdoor temperature is greater than the fifth temperature, it can be understood that it is summer. However, when the outdoor hot and dry air is low, the cooling module, the components of the second circulation system except the second fan, and the air heat exchanger can be controlled to be in working state. In this way, the cooling module cools the air obtained from the first circulation system, and the air after the above cooling is cooled in the form of direct wind to cool the office.

[0069] As an optional embodiment, an exhaust vent is further provided in the target room, and the control of the first circulation system, the second circulation system, and the air heat exchanger included in the air side waste heat recovery device of the machine room are in a working state, further comprising:

[0070] When the outdoor temperature is greater than the sixth temperature and less than the seventh temperature, the first return air valve, the first fan, the third air inlet and the fresh air valve included in the first circulation system are controlled to be in working state. After the outdoor air enters the target room through the first circulation system, it enters the outdoor through the exhaust port.

[0071] For example: See Figure 6 ,like Figure 6 As shown, an exhaust port 16 is further provided in the target room 15. After the outdoor air enters the target room 15 through the first circulation system, it can enter the outside through the exhaust port 16, thereby enhancing the exhaust effect.

[0072] It should be noted that, optionally, the temperature adjustment module can choose to heat or cool the air in the first circulation system according to the temperature of the target room. For example, when the temperature of the target room is higher than a preset threshold, the temperature adjustment module can cool the air in the first circulation system, thereby lowering the temperature in the target room; when the temperature of the target room is lower than or equal to the preset threshold, the temperature adjustment module can heat the air in the first circulation system, thereby raising the temperature in the target room.

[0073] In the embodiment of the present application, if the outdoor temperature is greater than the sixth temperature and less than the seventh temperature, it can be understood that it is in the transition season. At this time, the outdoor air temperature meets the indoor comfort requirements. The full ventilation mode can be used. Outdoor fresh air enters the air conditioner through the third air inlet and is then delivered to the target room. After the outdoor air cools the target room, it is discharged to the outside through the exhaust port. In this way, the energy consumption of cooling the target room is reduced.

[0074] The above is a preferred implementation of the embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A waste heat recovery device on the air side of a machine room, characterized in that: include: A first circulation system, a second circulation system and an air heat exchanger, wherein the air heat exchanger includes a first heat exchange pipe and a second heat exchange pipe, the first circulation system is connected to the first heat exchange pipe, the second circulation system is connected to the second heat exchange pipe, the first air inlet of the first circulation system is connected to the target room indoors or the outdoors, the indoors also includes a machine room, the first air outlet of the first circulation system is connected to the target room or the machine room, and the second air inlet and second air outlet of the second circulation system are both connected to the machine room.

2. The machine room air side waste heat recovery device according to claim 1, characterized in that: The first circulation system also includes a first return air valve, a cooling module, a temperature adjustment module and a first fan. The first air inlet is connected to the first heat exchange pipe through the first return air valve and the cooling module in sequence, and the first heat exchange pipe is also connected to the first air outlet through the temperature adjustment module and the first fan in sequence.

3. The machine room air side waste heat recovery device according to claim 2, characterized in that: The first circulation system also includes a third air inlet and a fresh air valve. The third air inlet is connected to the outside of the room, and the third air inlet is connected to the first connecting port through the fresh air valve. The first connecting port is located between the first heat exchange pipe and the temperature regulation module.

4. The machine room air side waste heat recovery device according to claim 1, characterized in that: The second circulation system further includes a second fan and a circulation air valve. The second air inlet is connected to the second heat exchange pipe through the second fan, and the second heat exchange pipe is connected to the second air outlet through the circulation air valve.

5. The machine room air side waste heat recovery device according to any one of claims 1 to 4, characterized in that: The target room includes an office or a heat-demanding room, and the heat-demanding room is a room with heating or anti-freezing requirements.

6. A control method for a waste heat recovery device on the air side of a machine room, characterized in that: The method applied to the air-side waste heat recovery device of a computer room according to any one of claims 1 to 5 comprises: Controlling the first circulation system, the second circulation system and the air heat exchanger included in the air side waste heat recovery device of the machine room to be in working state; The air obtained by the first circulation system is used to exchange heat with the hot air in the indoor machine room obtained by the second circulation system in the air heat exchanger to obtain heat-exchanged air, and the heat-exchanged air is used to be output to the target room through the first air outlet of the first circulation system.

7. The method according to claim 6, characterized in that The first air inlet of the first circulation system is connected to the outside, the first air outlet of the first circulation system is connected to the machine room, and the first circulation system, the second circulation system and the air heat exchanger included in the wind side waste heat recovery device of the machine room are controlled to be in a working state, including: When the outdoor temperature is lower than a first preset temperature, controlling the temperature regulating module included in the first circulation system to be in a state for heating the air obtained by the first circulation system, and controlling the second circulation system and the air heat exchanger to be in an operating state; When the outdoor temperature is greater than a first preset temperature and less than a second preset temperature, the cooling module included in the first circulation system is controlled to be in a state for performing current enthalpy treatment on the air obtained by the first circulation system, the second fan included in the second circulation system is controlled to be in an off state, and the air heat exchanger is controlled to be in an operating state; When the outdoor temperature is greater than the second preset temperature, the cooling module included in the first circulation system is controlled to be in a closed state, the third air inlet and the temperature adjustment module are controlled to be in an open state, the second fan included in the second circulation system is controlled to be in a closed state, and the air heat exchanger is controlled to be in a working state.

8. The method according to claim 7, characterized in that The air-side waste heat recovery device of the machine room is applied to air conditioners, and the air conditioners include at least one of the following: a chilled water type machine room air conditioner, a direct expansion type precision air conditioner, an indirect evaporative cooling air conditioner, and a direct ventilation air conditioner.

9. The method according to claim 6, characterized in that The target room includes a heat-demanding room, and the first air inlet and the first air outlet of the first circulation system are both connected to the heat-demanding room; The controlling of the first circulation system, the second circulation system and the air heat exchanger included in the air side waste heat recovery device of the machine room to be in a working state includes: When the outdoor temperature is lower than the third temperature, the first circulation system, the second circulation system and the air heat exchanger are all controlled to be in working state, so that the air in the target room obtained by the first circulation system and the hot air in the machine room obtained by the second circulation system are heat exchanged in the air heat exchanger, and the obtained heat-exchanged air is input into the target room.

10. The method according to claim 6, characterized in that The target room includes an office, and the first air inlet and the first air outlet of the first circulation system are both connected to the office; The controlling of the first circulation system, the second circulation system and the air heat exchanger included in the air side waste heat recovery device of the machine room to be in a working state includes: When the outdoor temperature is lower than the fourth temperature, the first circulation system, the second circulation system and the air heat exchanger are all controlled to be in working state, so that the air in the target room obtained by the first circulation system and the hot air in the machine room obtained by the second circulation system are heat exchanged in the air heat exchanger, and the obtained heat-exchanged air is input into the target room.

11. The method according to claim 10, characterized in that The controlling of the first circulation system, the second circulation system and the air heat exchanger included in the air side waste heat recovery device of the machine room to be in a working state further includes: When the outdoor temperature is greater than the fifth temperature, the cooling module included in the first circulation system, the components of the second circulation system except the second fan, and the air heat exchanger are controlled to be in working state, and the second fan is controlled to be in a stopped working state.

12. The method according to claim 10, characterized in that The target room is also provided with an exhaust vent, and the control unit for controlling the air side waste heat recovery device of the machine room, including the first circulation system, the second circulation system and the air heat exchanger, is in a working state, further comprising: When the outdoor temperature is greater than the sixth temperature and less than the seventh temperature, the first return air valve, the first fan, the third air inlet and the fresh air valve included in the first circulation system are controlled to be in working state. After the outdoor air enters the target room through the first circulation system, it enters the outdoor through the exhaust port.

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