A heat recovery system and control method thereof

Abstract

The present invention provides a heat recovery system and a control method thereof, wherein a heat recovery system includes: a heat exchange component outside the machine room, a heat exchange component inside the machine room and an air-conditioning system, the heat exchange component outside the machine room is connected with the heat exchange component inside the machine room to form a first air-conditioning loop to adjust the temperature in the machine room, the heat exchange component outside the machine room includes a soil source device and a second heat exchanger, the soil source device has a first end and a second end, the second heat exchanger has a third end and a fourth end, the first end is connected with the third end through a first pipeline, and the second end is connected with the fourth end through a second pipeline, the refrigerant in the first air-conditioning loop can be heat exchanged through the soil source device and / or the second heat exchanger, which can overcome the defect of low cooling efficiency of the machine room air-conditioning in the harsh environment of high temperature in summer in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of heat recovery, and in particular to a heat recovery system and a control method thereof. Background Art

[0002] The rapid development of the information industry and digital infrastructure has driven a rapid increase in the number and scale of computer rooms and base stations. According to statistics, air conditioning in computer rooms and base stations accounts for over 40% of their total energy consumption. Currently, computer room air conditioning systems commonly use air-source cooling systems. However, during harsh summer weather with high outdoor temperatures, cooling efficiency is low, energy consumption is high, and even failures may occur. This violates the high stability requirements of data center computer room air conditioning. However, soil-source cooling systems, with their stable temperature year-round and used when outdoor temperatures are high, circumvent this limitation of computer room heat recovery systems, ensuring year-round high system efficiency. Furthermore, computer room air conditioning systems emit a significant amount of heat year-round, which is released into the outdoor atmosphere, causing waste heat pollution and wasting energy. In today's climate of promoting energy conservation and emission reduction, fully utilizing this heat can significantly reduce system operating costs and improve energy efficiency.

[0003] In the related technology, it is proposed to recover the heat of the computer room air conditioner as a heat source for the comfort air conditioner to produce hot water for users. However, the comfort air conditioner of this system cannot provide cooling for users and has limited scope of use. In addition, the energy side of the computer room air conditioner uses an air source. In the harsh high temperature environment in summer, the computer room air conditioner has low cooling efficiency, high energy consumption and even operational failures. This violates the high stability requirements of the data center and causes significant losses to the data center. Summary of the Invention

[0004] Therefore, the present invention provides a heat recovery system and a control method thereof, which can overcome the defect of low cooling efficiency of the air conditioner in the computer room under the harsh environment of high temperature in summer in the prior art.

[0005] In order to solve the above problems, the present invention provides a heat recovery system, which includes:

[0006] A heat exchange component outside the computer room, a heat exchange component inside the computer room and an air-conditioning system, wherein the heat exchange component outside the computer room is connected to the heat exchange component inside the computer room to form a first air-conditioning circuit to adjust the temperature inside the computer room, the heat exchange component outside the computer room includes a soil source device and a second heat exchanger, the soil source device has a first end and a second end, the second heat exchanger has a third end and a fourth end, the first end is connected to the third end through a first pipeline, and the second end is connected to the fourth end through a second pipeline, and the refrigerant in the first air-conditioning circuit can be heat exchanged through the soil source device and / or the second heat exchanger.

[0007] In some embodiments, the heat exchange component inside the machine room includes a third heat exchanger, the third heat exchanger having a fifth end and a sixth end, the fifth end being connected to the first pipeline through a third pipeline, a sixth control valve and an eighth control valve being provided on the first pipeline, and the eighth control valve being located on the first pipeline near the third end relative to the sixth control valve, the third pipeline being connected between the sixth control valve and the eighth control valve, the sixth end being connected to the second pipeline through a fourth pipeline, a fifth control valve and a seventh control valve being provided on the second pipeline, the seventh control valve being located on the second pipeline near the fourth end relative to the fifth control valve, and the fourth pipeline being connected between the fifth control valve and the seventh control valve.

[0008] In some embodiments, when the heat recovery system is used in summer and the outdoor real-time temperature is greater than a first preset temperature, the fifth control valve and the sixth control valve are opened, the seventh control valve and the eighth control valve are closed, and the first air-conditioning circuit exchanges heat through the soil source device; when the outdoor real-time temperature does not exceed the first preset temperature, the fifth control valve and the sixth control valve are closed, the seventh control valve and the eighth control valve are opened, and the first air-conditioning circuit exchanges heat through the second heat exchanger;

[0009] When the heat recovery system is used in winter and the real-time outdoor temperature is greater than the second preset temperature, the fifth control valve and the sixth control valve are opened, the seventh control valve and the eighth control valve are closed, and the first air-conditioning circuit exchanges heat through the soil source device; when the real-time outdoor temperature does not exceed the second preset temperature, the fifth control valve and the sixth control valve are closed, the seventh control valve and the eighth control valve are opened, and the first air-conditioning circuit exchanges heat through the second heat exchanger.

[0010] In some embodiments, the heat recovery system further includes a first heat exchanger, which is disposed on the first air-conditioning circuit. The first heat exchanger is connected to the air-conditioning system, and the first heat exchanger can use the heat in the first air-conditioning circuit to heat domestic hot water and / or provide heat load to the air-conditioning system.

[0011] In some embodiments, the air-conditioning system includes a fourth heat exchanger, a fifth heat exchanger, and a sixth heat exchanger, and the fourth heat exchanger, the fifth heat exchanger, and the sixth heat exchanger are connected in series to form a second air-conditioning loop, and the fourth heat exchanger includes a seventh end and an eighth end, the seventh end is connected to the inlet end of the first heat exchanger through the fifth pipe, and the eighth end is connected to the outlet end of the first heat exchanger through the sixth pipe.

[0012] In some embodiments, a heating pipeline is provided on the sixth heat exchanger, and the heating pipeline has a water inlet and a water return port. When the heat recovery system is used in winter, the heating pipeline can exchange heat with the sixth heat exchanger to provide heating for the interior of a civil building.

[0013] In some embodiments, the sixth pipeline is connected to a water supply pipe, which can exchange heat between domestic water and the first heat exchanger to heat the domestic water. A ninth control valve is provided on the water supply pipe, and a first pump body is provided on the sixth pipeline. The first pump body is located between the ninth control valve and the first heat exchanger.

[0014] In some embodiments, a first control valve is provided on the sixth pipeline, a connection point between the water supply pipe and the sixth pipeline is located between the first control valve and the first pump body, and a second control valve is provided on the fifth pipeline;

[0015] The air-conditioning system also includes a cooling tower, the inlet of the cooling tower is connected to the sixth pipeline through a seventh pipeline, and the connection point of the seventh pipeline and the sixth pipeline is located between the first control valve and the fourth heat exchanger. A third control valve is provided on the seventh pipeline. The outlet of the cooling tower is connected to the fifth pipeline through an eighth pipeline, and a second pump body and a fourth control valve are provided on the fifth pipeline. The connection point of the eighth pipeline and the fifth pipeline is located between the second control valve and the fourth heat exchanger.

[0016] In some embodiments, when the air-conditioning system is cooling and the condensing pressure of the fifth heat exchanger is higher than the starting pressure of the fifth heat exchanger, the third control valve, the second pump body and the fourth control valve are opened, the fan on the fifth heat exchanger is turned off, and the second air-conditioning circuit exchanges heat through the cooling tower and the fourth heat exchanger; when the condensing pressure of the fifth heat exchanger is not higher than the starting pressure of the fifth heat exchanger, the third control valve, the second pump body and the fourth control valve are closed, the fan on the fifth heat exchanger is turned on, and the second air-conditioning circuit exchanges heat through the fifth heat exchanger.

[0017] In some embodiments, when the air conditioning system is heating:

[0018] When the heat recovered by the first heat exchanger is greater than the sum of the heat required for domestic hot water and the heat required for heating by the air conditioning system, the first control valve and the second control valve are opened, the fan on the fifth heat exchanger is turned off, the third control valve, the second pump body and the fourth control valve are closed, and the heat recovered by the first heat exchanger is exchanged with the fourth heat exchanger to cause the sixth heat exchanger to condense and release heat;

[0019] When the heat recovered by the first heat exchanger does not exceed the heat required for domestic hot water, the first control valve and the second control valve are closed, the fan on the fifth heat exchanger is turned on, and the refrigerant in the second air-conditioning circuit exchanges heat in the fourth heat exchanger and then exchanges heat with the fifth heat exchanger, so that the sixth heat exchanger condenses and releases heat;

[0020] When the heat recovered by the first heat exchanger is greater than the heat required for domestic hot water, but less than the sum of the heat required for domestic hot water and the heat required for heating by the air-conditioning system, the first control valve and the second control valve are opened, the fan on the fifth heat exchanger is turned on, the third control valve and the fourth control valve are closed, the second pump body is turned off, and the refrigerant in the second air-conditioning circuit exchanges heat with the fourth heat exchanger and the fifth heat exchanger, so as to cause the sixth heat exchanger to condense and release heat.

[0021] The present invention further provides a control method for the heat recovery system as described in any of the preceding items, comprising:

[0022] a judging step of detecting the working status of the air conditioning system;

[0023] The control step is to adjust the heat exchange mode of the heat exchange component outside the computer room and the cooling source of the air-conditioning system when the air-conditioning system is cooling; and to adjust the heat exchange mode of the heat exchange component outside the computer room and the heating source of the air-conditioning system when the air-conditioning system is heating.

[0024] In some embodiments, when the air conditioning system is cooling, the heat exchange mode of the heat exchange component outside the computer room is adjusted, specifically according to the following implementation, when the heat exchange component outside the computer room includes a soil source device and a second heat exchanger, and the heat exchange component inside the computer room includes a third heat exchanger:

[0025] A determination step of determining a relationship between the outdoor real-time temperature and a first preset temperature;

[0026] Control step: when the real-time outdoor temperature is greater than the first preset temperature, the fifth control valve and the sixth control valve are opened, the seventh control valve and the eighth control valve are closed, and the first air-conditioning circuit exchanges heat through the soil source device; when the real-time outdoor temperature does not exceed the first preset temperature, the fifth control valve and the sixth control valve are closed, the seventh control valve and the eighth control valve are opened, and the first air-conditioning circuit exchanges heat through the second heat exchanger.

[0027] In some embodiments, when the air-conditioning system is cooling, adjusting the cooling source of the air-conditioning system is specifically implemented as follows, when a first control valve is provided on the sixth pipeline and the air-conditioning system further includes a cooling tower:

[0028] a judging step, when the condensing pressure of the fifth heat exchanger is not higher than the starting pressure of the fifth heat exchanger;

[0029] The control step is as follows: when the condensing pressure of the fifth heat exchanger is higher than the starting pressure of the fifth heat exchanger, the third control valve, the second pump body and the fourth control valve are opened, the fan on the fifth heat exchanger is turned off, and the second air-conditioning circuit exchanges heat through the cooling tower and the fourth heat exchanger; when the condensing pressure of the fifth heat exchanger is not higher than the starting pressure of the fifth heat exchanger, the third control valve, the second pump body and the fourth control valve are closed, the fan on the fifth heat exchanger is turned on, and the second air-conditioning circuit exchanges heat through the fifth heat exchanger.

[0030] In some embodiments, when the air conditioning system is heating, the heat exchange mode of the heat exchange component outside the computer room is adjusted, specifically according to the following implementation, when the heat exchange component outside the computer room includes a soil source device and a second heat exchanger, and the heat exchange component inside the computer room includes a third heat exchanger:

[0031] A determination step of determining a relationship between the outdoor real-time temperature and a second preset temperature;

[0032] Control step: when the real-time outdoor temperature is greater than the second preset temperature, the fifth control valve and the sixth control valve are opened, the seventh control valve and the eighth control valve are closed, and the first air-conditioning circuit exchanges heat through the soil source device; when the real-time outdoor temperature does not exceed the second preset temperature, the fifth control valve and the sixth control valve are closed, the seventh control valve and the eighth control valve are opened, and the first air-conditioning circuit exchanges heat through the second heat exchanger.

[0033] In some embodiments, when the air conditioning system is heating, the heat source of the air conditioning system is adjusted, specifically according to the following implementation, when a first control valve is provided on the sixth pipeline and the air conditioning system further includes a cooling tower:

[0034] a determination step of determining the relationship between the heat recovered by the first heat exchanger, the heat required for domestic hot water, and the heat required for heating by the air-conditioning system;

[0035] a control step, wherein when the heat recovered by the first heat exchanger is greater than the sum of the heat required for domestic hot water and the heat required for heating by the air conditioning system, the first control valve and the second control valve are opened, the fan on the fifth heat exchanger is turned off, the third control valve, the second pump body, and the fourth control valve are closed, and the heat recovered by the first heat exchanger is exchanged with the fourth heat exchanger to cause the sixth heat exchanger to condense and release heat;

[0036] When the heat recovered by the first heat exchanger does not exceed the heat required for domestic hot water, the first control valve and the second control valve are closed, the fan on the fifth heat exchanger is turned on, and the refrigerant in the second air-conditioning circuit exchanges heat in the fourth heat exchanger and then exchanges heat with the fifth heat exchanger, so that the sixth heat exchanger condenses and releases heat;

[0037] When the heat recovered by the first heat exchanger is greater than the heat required for domestic hot water, but less than the sum of the heat required for domestic hot water and the heat required for heating by the air-conditioning system, the first control valve and the second control valve are opened, the fan on the fifth heat exchanger is turned on, the third control valve and the fourth control valve are closed, the second pump body is turned off, and the refrigerant in the second air-conditioning circuit exchanges heat with the fourth heat exchanger and the fifth heat exchanger, so as to cause the sixth heat exchanger to condense and release heat.

[0038] The present invention provides a heat recovery system and control method thereof. The computer room air conditioning system utilizes dual sources (soil source and air source) that work together to compensate for deficiencies and achieve stable and efficient operation. Specifically, the soil source device includes horizontal and vertical underground pipes. Refrigerant flows through both the underground pipes and the secondary heat exchanger. The soil source device directly exchanges heat with the soil source via the refrigerant, reducing heat loss caused by secondary heat exchange. Simultaneously, the heat recovery system utilizes air source cooling in the summer, with condensation occurring at the secondary heat exchanger. When outdoor temperatures are high and inclement in summer, the soil source, with its stable temperature year-round, is used for cooling, ensuring efficient operation of the computer room air conditioning system throughout the summer. The entire system ensures efficient, stable, and energy-saving operation of the computer room air conditioning system year-round. The soil source device and the second heat exchanger can simultaneously exchange heat with the refrigerant in the first air-conditioning loop, thereby improving the cooling efficiency and energy utilization rate in the machine room. In the first air-conditioning loop, the soil source device and the second heat exchanger can be regarded as an outdoor unit, and the third heat exchanger can be regarded as an indoor unit. Of course, the first air-conditioning loop also includes a compressor, and the air-conditioning system formed is a compressor-soil source device or a second heat exchanger-third heat exchanger-compressor. The first heat exchanger is arranged on the first air-conditioning loop, and its function is to condense the refrigerant in the loop and release heat at the first heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of the heat recovery system of the present invention.

[0040] The reference numerals indicate:

[0041] 0. Heat exchange assembly outside the machine room; 1. Heat exchange assembly inside the machine room; 2. Air conditioning system; 3. Third heat exchanger; 4. Second heat exchanger; 5. First heat exchanger; 6. Fourth heat exchanger; 7. Fifth heat exchanger; 8. Sixth heat exchanger; 9. Cooling tower; 10. First pump body; 11. Second pump body; 12. First control valve; 13. Second control valve; 14. Third control valve; 15. Fourth control valve; 16. Fifth control valve; 17. Sixth control valve; 18. Seventh control valve; 19. Eighth control valve; 20. Water inlet; 21. Return water inlet; 22. Soil source device; 23. Ninth control valve; 24. Water supply pipe. DETAILED DESCRIPTION

[0042] See also Figure 1As shown, according to an embodiment of the present invention, a heat recovery system is provided, which includes: a heat exchange component 0 outside the machine room, a heat exchange component 1 inside the machine room, a first heat exchanger 5 and an air-conditioning system 2, the heat exchange component 0 outside the machine room is connected to the heat exchange component 1 inside the machine room to form a first air-conditioning loop to adjust the temperature in the machine room, the heat exchange component 0 outside the machine room includes a soil source device 22 and a second heat exchanger 4, the soil source device 22 has a first end and a second end, the second heat exchanger 4 has a third end and a fourth end, the first end is connected to the third end through a first pipeline, and the second end is connected to the fourth end through a second pipeline, and the refrigerant in the first air-conditioning loop can be heat exchanged through the soil source device 22 and / or the second heat exchanger 4. In this technical solution, the heat recovery system of the present invention utilizes dual sources (soil source and air source) for the computer room air conditioning system, which work together to compensate for deficiencies and achieve stable and efficient operation. Specifically, the soil source device 22 includes a horizontal buried pipe and a vertical buried pipe. Refrigerant flows through both the buried pipe and the second heat exchanger 4. The soil source device 22 directly exchanges heat with the soil source through the refrigerant, reducing heat loss caused by secondary heat exchange. At the same time, the heat recovery system of the present invention uses air source cooling in the summer and condensation at the second heat exchanger 4. When the outdoor temperature is high and the weather is inclement in the summer, the soil source with stable temperature all year round is used for cooling, so that the computer room air conditioning system is in an efficient operating state throughout the summer. The entire system ensures that the computer room air conditioning operates efficiently, stably and energy-saving all year round. The soil source device 22 and the second heat exchanger 4 can simultaneously exchange heat with the refrigerant in the first air-conditioning loop, thereby improving the cooling efficiency and energy utilization rate in the machine room. In the first air-conditioning loop, the soil source device 22 and the second heat exchanger 4 can be regarded as an outdoor unit, and the third heat exchanger 3 can be regarded as an indoor unit. Of course, the first air-conditioning loop also includes a compressor, and the air-conditioning system formed is a compressor-soil source device 22 or a second heat exchanger 4-third heat exchanger 3-compressor. The first heat exchanger 5 is arranged on the first air-conditioning loop, and its function is to condense the refrigerant in the loop at the first heat exchanger 5 and release heat. In the heat recovery system of the present invention, the machine room air-conditioning can simultaneously use the soil source device 22 and the second heat exchanger 4 for heat exchange, and can also select either the soil source device 22 or the second heat exchanger 4 for heat exchange according to actual conditions.

[0043] In some embodiments, the heat recovery system further comprises a first heat exchanger (5), the first heat exchanger 5 being arranged on the first air conditioning circuit, the first heat exchanger 5 being connected to the air conditioning system 2, and the first heat exchanger 5 being capable of using the heat in the first air conditioning circuit to heat domestic hot water and / or providing a heat load to the air conditioning system 2. In this technical solution, the heat discharged from the first air conditioning circuit of the machine room can be recovered through the first heat exchanger 5 throughout the year, and domestic hot water, such as a hot water source for bathing, can be provided to users throughout the year. In winter, when the air conditioning system 2 needs to heat, the first heat exchanger 5 is connected to the air conditioning system 2 and can also provide a heat load to the air conditioning system 2. The dual function of recovering the heat discharged from the first air conditioning circuit of the machine room fully recovers the waste heat of the machine room. The machine room air conditioning discharges a large amount of heat to the outside during cooling throughout the year. This heat is discharged to the outdoor atmosphere, which not only causes waste heat pollution to the surrounding environment, but also wastes energy. In today's advocacy of energy conservation and emission reduction, making full use of this part of heat will greatly reduce the operating cost of the system and improve energy utilization. The heat load is the heat that the air conditioner needs to supply to the room to compensate for the vector heat of the room.

[0044] In some embodiments, the heat exchange assembly 1 inside the machine room includes a third heat exchanger 3, the third heat exchanger 3 having a fifth end and a sixth end, the fifth end being connected to the first pipeline through a third pipeline, a sixth control valve 17 and an eighth control valve 19 being provided on the first pipeline, and the eighth control valve 19 being located on the first pipeline near the third end relative to the sixth control valve 17, the third pipeline being connected between the sixth control valve 17 and the eighth control valve 19, the sixth end being connected to the second pipeline through a fourth pipeline, a fifth control valve 16 and a seventh control valve 18 being provided on the second pipeline, the seventh control valve 18 being located on the second pipeline near the fourth end relative to the fifth control valve 16, and the fourth pipeline being connected between the fifth control valve 16 and the seventh control valve 18. In this technical solution, through the sixth control valve 17, the eighth control valve 19, the fifth control valve 16 and the seventh control valve 18, the first air-conditioning circuit can freely select the soil source device 22 for heat exchange or the second heat exchanger 4. The heat exchange efficiency of the soil source device 22 or the second heat exchanger 4 is different, and different heat exchange methods can be selected in different environments to maximize the energy utilization rate while ensuring the temperature in the machine room.

[0045] In some embodiments, when the heat recovery system is used in summer and the outdoor real-time temperature is greater than a first preset temperature, the fifth control valve 16 and the sixth control valve 17 are opened, the seventh control valve 18 and the eighth control valve 19 are closed, and the first air-conditioning circuit exchanges heat through the soil source device 22; when the outdoor real-time temperature does not exceed the first preset temperature, the fifth control valve 16 and the sixth control valve 17 are closed, the seventh control valve 18 and the eighth control valve 19 are opened, and the first air-conditioning circuit exchanges heat through the second heat exchanger 4;

[0046] When the heat recovery system is used in winter and the real-time outdoor temperature is greater than the second preset temperature, the fifth control valve 16 and the sixth control valve 17 are opened, the seventh control valve 18 and the eighth control valve 19 are closed, and the first air-conditioning circuit exchanges heat through the soil source device 22; when the real-time outdoor temperature does not exceed the second preset temperature, the fifth control valve 16 and the sixth control valve 17 are closed, the seventh control valve 18 and the eighth control valve 19 are opened, and the first air-conditioning circuit exchanges heat through the second heat exchanger 4. In this technical solution, the first preset temperature is preferably 35°C, and the second preset temperature is preferably 10°C. When the first air-conditioning circuit of the computer room is in winter or summer, different condensation heat release methods are used to regulate the heat in the computer room at different outdoor temperatures. In summer, air source cooling is used, and the first air-conditioning circuit of the computer room condenses at the second heat exchanger 4. When the outdoor temperature is high and the weather is bad in summer, the soil source device 22 with stable temperature all year round is used for cooling, so that the air-conditioning system of the computer room is in an efficient operating state throughout the summer; when air source cooling is used in winter, the first air-conditioning circuit of the computer room is cooled by the soil source device 22. When the outdoor temperature is low and the weather is bad in winter, the second heat exchanger 4 is used for cooling, so that the first air-conditioning circuit of the computer room is in an efficient, stable and energy-saving operating state throughout the year. In the heat recovery system of the present invention, summer refers to the season when the average outdoor temperature is above 22°C, and winter is the beginning of winter when the average outdoor temperature is below 10°C. Among them, when the air-conditioning system 2 is cooling, it is summer, and when the air-conditioning system 2 is heating, it is winter.

[0047] In some embodiments, the air conditioning system 2 includes a fourth heat exchanger 6, a fifth heat exchanger 7, and a sixth heat exchanger 8. The fourth heat exchanger 6, the fifth heat exchanger 7, and the sixth heat exchanger 8 are connected in series to form a second air conditioning loop. The fourth heat exchanger 6 includes a seventh end and an eighth end. The seventh end is connected to the inlet end of the first heat exchanger 5 via a fifth pipe, and the eighth end is connected to the outlet end of the first heat exchanger 5 via the sixth pipe. In this technical solution, in the second air conditioning loop, the fourth heat exchanger 6 and the fifth heat exchanger 7 can be considered as outdoor units, and the sixth heat exchanger 8 can be considered as an indoor unit. The heat in the machine room above the first heat exchanger 5 can be transferred to the fourth heat exchanger 6 via the fifth and sixth pipes, providing heat load for the second air conditioning loop in winter. Of course, the second air conditioning loop also includes a compressor, forming an air conditioning system of compressor-fourth heat exchanger 6 and / or fifth heat exchanger 7-sixth heat exchanger 8-compressor.

[0048] In some embodiments, the sixth heat exchanger 8 is provided with a heating pipeline having a water inlet and a water return port. When the heat recovery system is used in winter, the heating pipeline can exchange heat with the sixth heat exchanger 8 to provide indoor heating for residential buildings. In this technical solution, in winter, the heat within the machine room absorbed by the fourth heat exchanger 6 can be supplied to the heating pipeline via the sixth heat exchanger 8 in the second air conditioning circuit to provide indoor heating for the residential building, thereby improving the utilization rate of thermal energy within the machine room.

[0049] In some embodiments, the sixth pipeline is connected to a water supply pipe 24, which can exchange heat between domestic water and the first heat exchanger 5 to heat the domestic water. A ninth control valve 23 is provided on the water supply pipe 24, and a first pump body 10 is provided on the sixth pipeline, located between the ninth control valve 23 and the first heat exchanger 5. In this technical solution, heat from the machine room can be recovered through the first heat exchanger 5, and heat can be exchanged with the water supply pipe throughout the year to provide domestic hot water, thereby improving the heat recovery rate of the machine room. The water supply pipe 24 has an inlet and an outlet. After the water entering the inlet exchanges heat with the first heat exchanger 5, it is discharged from the outlet to provide domestic hot water. The first pump body 10 can provide power for the water exchanged in the first heat exchanger 5, allowing the first heat exchanger 5 to continuously heat domestic hot water. All control valves involved in the present invention are preferably solenoid valves.

[0050] In some embodiments, a first control valve 12 is provided on the sixth pipeline, and a connection point between the water supply pipe 24 and the sixth pipeline is located between the first control valve 12 and the first pump body 10. A second control valve 13 is provided on the fifth pipeline;

[0051] The air conditioning system 2 also includes a cooling tower 9. The inlet of the cooling tower 9 is connected to the sixth pipeline through a seventh pipeline. The connection point between the seventh pipeline and the sixth pipeline is located between the first control valve 12 and the fourth heat exchanger 6. The seventh pipeline is provided with a third control valve 14. The outlet of the cooling tower 9 is connected to the fifth pipeline through an eighth pipeline. The fifth pipeline is provided with a second pump body 11 and a fourth control valve 15. The connection point between the eighth pipeline and the fifth pipeline is located between the second control valve 13 and the fourth heat exchanger 6. In this technical solution, the provision of the cooling tower 9 makes the air conditioning system 2 have a multi-source feature. At the same time, the multi-source system air source, heat recovery, and cooling tower can flexibly select energy systems according to the on-site energy conditions and user load conditions. In the heat recovery system of the present invention, the cooling tower 9 can be replaced with other water source systems, such as a surface water source system, a groundwater source system, a seawater source system, a sewage source system, a buried pipe water source system, etc.

[0052] In some embodiments, when the air-conditioning system 2 is cooling and the condensing pressure of the fifth heat exchanger 7 is higher than the starting pressure of the fifth heat exchanger 7, the third control valve 14, the second pump body 11 and the fourth control valve 15 are opened, the fan on the fifth heat exchanger 7 is turned off, and the second air-conditioning circuit exchanges heat through the cooling tower 9 and the fourth heat exchanger 6; when the condensing pressure of the fifth heat exchanger 7 is not higher than the starting pressure of the fifth heat exchanger 7, the third control valve 14, the second pump body 11 and the fourth control valve 15 are closed, the fan on the fifth heat exchanger 7 is turned on, and the second air-conditioning circuit exchanges heat through the fifth heat exchanger 7. In this technical solution, preferably, the relationship between the condensing pressure of the fifth heat exchanger 7 and the starting pressure of the fifth heat exchanger 7 can be replaced by determining whether there is sufficient water or whether a renewable water source is available. The judgment condition is whether the water source is sufficient, that is, whether the location is an urban area with perennial drought and water shortage. In this case, cooling towers cannot be used, and air cooling, that is, the fifth heat exchanger 7, can be used. If the water source is sufficient or there is free surface water, river water, or groundwater available in the city, then cooling towers can be given priority. During cooling, a dual-source mode of air source and cooling tower 9 is adopted, and they work together to compensate for the shortcomings, so that the air conditioning system operates stably and efficiently, reducing usage costs.

[0053] In some embodiments, when the air conditioning system 2 is heating:

[0054] When the heat recovered by the first heat exchanger 5 is greater than the sum of the heat required for domestic hot water and the heat required for heating by the air-conditioning system 2, the first control valve 12 and the second control valve 13 are opened, the fan on the fifth heat exchanger 7 is turned off, the third control valve 14, the second pump body 11 and the fourth control valve 15 are closed, and the heat recovered by the first heat exchanger 5 is exchanged with the fourth heat exchanger 6 to cause the sixth heat exchanger 8 to condense and release heat;

[0055] When the heat recovered by the first heat exchanger 5 does not exceed the heat required for domestic hot water, the first control valve 12 and the second control valve 13 are closed, the fan on the fifth heat exchanger 7 is turned on, and the refrigerant in the second air-conditioning circuit exchanges heat in the fourth heat exchanger 6 and then exchanges heat with the fifth heat exchanger 7, so that the sixth heat exchanger 8 condenses and releases heat;

[0056] When the heat recovered by the first heat exchanger 5 is greater than the heat required for domestic hot water, but less than the sum of the heat required for domestic hot water and the heat required for heating by the air conditioning system 2, the first control valve 12 and the second control valve 13 are opened, the fan on the fifth heat exchanger 7 is turned on, the third control valve 14 and the fourth control valve 15 are closed, the second pump body 11 is turned off, and the refrigerant in the second air conditioning circuit exchanges heat with the fourth heat exchanger 6 and the fifth heat exchanger 7, causing the sixth heat exchanger 8 to condense and release heat. In this technical solution, the heat recovered by the first heat exchanger 5 in the machine room is compared with the heat required for domestic hot water and the heat required for heating by the air conditioning system 2. Different heating methods are used in different situations to fully utilize the recovered heat in the machine room and improve the utilization rate of the heat in the machine room.

[0057] The present invention also provides a control method for a heat recovery system, comprising:

[0058] a judgment step of detecting the working status of the air conditioning system 2;

[0059] In the control step, when the air conditioning system 2 is cooling, the heat exchange mode of the heat exchange assembly 0 outside the computer room is adjusted, thereby adjusting the cooling source of the air conditioning system 2. When the air conditioning system 2 is heating, the heat exchange mode of the heat exchange assembly 0 outside the computer room is adjusted, thereby adjusting the heating source of the air conditioning system 2. In this technical solution, the operating status of the air conditioning system 2 is detected. When the air conditioning system 2 is cooling or heating, the heat exchange assembly 0 outside the computer room and the air conditioning system 2 are adjusted to improve the heat recovery rate of the computer room. In the control method of the heat recovery system of the present invention, when the first air conditioning circuit of the computer room is operating, domestic hot water can be heated through the first heat exchanger 5, so that users can use hot water year-round.

[0060] In some embodiments, when the air conditioning system 2 is cooling, the heat exchange mode of the heat exchange component 0 outside the machine room is adjusted, specifically according to the following implementation, when the heat exchange component 0 outside the machine room includes a soil source device 22 and a second heat exchanger 4, and the heat exchange component 1 inside the machine room includes a third heat exchanger 3:

[0061] A determination step of determining a relationship between the outdoor real-time temperature and a first preset temperature;

[0062] In the control step, when the outdoor real-time temperature is greater than a first preset temperature, the fifth control valve 16 and the sixth control valve 17 are opened, the seventh control valve 18 and the eighth control valve 19 are closed, and the first air-conditioning circuit exchanges heat through the soil source device 22. When the outdoor real-time temperature does not exceed the first preset temperature, the fifth control valve 16 and the sixth control valve 17 are closed, the seventh control valve 18 and the eighth control valve 19 are opened, and the first air-conditioning circuit exchanges heat through the second heat exchanger 4. In this technical solution, different condensation heat release methods are used to regulate the heat in the computer room at different outdoor temperatures. In the summer, air source cooling is used, and the first air-conditioning circuit of the computer room condenses at the second heat exchanger 4. When the outdoor temperature is high and the weather is inclement in the summer, the soil source device 22 with a stable temperature year-round is used for cooling, ensuring that the computer room air-conditioning system operates efficiently throughout the summer.

[0063] In some embodiments, when the air conditioning system 2 is cooling, the cooling source of the air conditioning system 2 is adjusted, specifically according to the following implementation, when the first control valve 12 is provided on the sixth pipeline and the air conditioning system 2 further includes a cooling tower 9:

[0064] a judging step of judging the relationship between the condensing pressure of the fifth heat exchanger 7 and the starting pressure of the fifth heat exchanger 7;

[0065] Control step: when the condensing pressure of the fifth heat exchanger 7 is higher than the starting pressure of the fifth heat exchanger 7, the third control valve 14, the second pump body 11 and the fourth control valve 15 are opened, the fan on the fifth heat exchanger 7 is turned off, and the second air-conditioning circuit exchanges heat through the cooling tower 9 and the fourth heat exchanger 6; when the condensing pressure of the fifth heat exchanger 7 is not higher than the starting pressure of the fifth heat exchanger 7, the third control valve 14, the second pump body 11 and the fourth control valve 15 are closed, the fan on the fifth heat exchanger 7 is turned on, and the second air-conditioning circuit exchanges heat through the fifth heat exchanger 7. In this technical solution, during cooling, a dual-source mode of air source and cooling tower 9 is adopted, which cooperate with each other to compensate for defects, while meeting cooling needs, improving energy utilization, making the air-conditioning system operate stably and efficiently, and reducing usage costs.

[0066] In some embodiments, when the air conditioning system 2 is heating, the heat exchange mode of the heat exchange component 0 outside the machine room is adjusted, specifically according to the following implementation, when the heat exchange component 0 outside the machine room includes a soil source device 22 and a second heat exchanger 4, and the heat exchange component 1 inside the machine room includes a third heat exchanger 3:

[0067] A determination step of determining a relationship between the outdoor real-time temperature and a second preset temperature;

[0068] In the control step, when the outdoor real-time temperature is greater than a second preset temperature, the fifth control valve 16 and the sixth control valve 17 are opened, the seventh control valve 18 and the eighth control valve 19 are closed, and the first air-conditioning circuit exchanges heat through the soil source device 22. When the outdoor real-time temperature does not exceed the second preset temperature, the fifth control valve 16 and the sixth control valve 17 are closed, the seventh control valve 18 and the eighth control valve 19 are opened, and the first air-conditioning circuit exchanges heat through the second heat exchanger 4. In this technical solution, when air source cooling is used in winter, the first air-conditioning circuit of the computer room is cooled by the soil source device 22. When the outdoor temperature is low and the weather is inclement in winter, the second heat exchanger 4 is used for cooling. This ensures that the first air-conditioning circuit of the computer room operates efficiently, stably and energy-efficiently throughout the year.

[0069] In some embodiments, when the air conditioning system 2 is heating, the heat source of the air conditioning system 2 is adjusted, specifically according to the following implementation, when the first control valve 12 is provided on the sixth pipeline and the air conditioning system 2 further includes a cooling tower 9:

[0070] a determination step of determining the relationship between the heat recovered by the first heat exchanger 5 , the heat required for domestic hot water, and the heat required for heating by the air-conditioning system 2 ;

[0071] Control step: when the heat recovered by the first heat exchanger 5 is greater than the sum of the heat required for domestic hot water and the heat required for heating by the air-conditioning system 2, the first control valve 12 and the second control valve 13 are opened, the fan on the fifth heat exchanger 7 is turned off, the third control valve 14, the second pump body 11 and the fourth control valve 15 are closed, and the heat recovered by the first heat exchanger 5 is exchanged with the fourth heat exchanger 6 to cause the sixth heat exchanger 8 to condense and release heat;

[0072] When the heat recovered by the first heat exchanger 5 does not exceed the heat required for domestic hot water, the first control valve 12 and the second control valve 13 are closed, the fan on the fifth heat exchanger 7 is turned on, and the refrigerant in the second air-conditioning circuit exchanges heat in the fourth heat exchanger 6 and then exchanges heat with the fifth heat exchanger 7, so that the sixth heat exchanger 8 condenses and releases heat;

[0073] When the heat recovered by the first heat exchanger 5 is greater than the heat required for domestic hot water, but less than the sum of the heat required for domestic hot water and the heat required for heating by the air conditioning system 2, the first control valve 12 and the second control valve 13 are opened, the fan on the fifth heat exchanger 7 is turned on, the third control valve 14 and the fourth control valve 15 are closed, the second pump body 11 is turned off, and the refrigerant in the second air conditioning circuit exchanges heat with the fourth heat exchanger 6 and the fifth heat exchanger 7, causing the sixth heat exchanger 8 to condense and release heat. In this technical solution, the heat recovered by the first heat exchanger 5 in the machine room is compared with the heat required for domestic hot water and the heat required for heating by the air conditioning system 2. Different heating methods are used in different situations to fully utilize the recovered heat in the machine room and improve the utilization rate of the heat in the machine room.

[0074] The present invention provides a heat recovery system: the heat exchange component 0 outside the machine room includes a soil source device 22 of a soil source. The soil source device 22 has a horizontal buried pipe and a vertical buried pipe, and refrigerant circulates in the pipe. By directly exchanging heat with the soil source through the refrigerant, the heat loss caused by the secondary heat exchange is reduced, and the energy utilization rate is high. At the same time, the system uses air source cooling in the summer, condensation at the second heat exchanger 4, and when the outdoor temperature is high and the weather is inclement in the summer, the soil source cooling with stable temperature all year round is used, so that the machine room air conditioning system is in an efficient operating state throughout the summer. The entire system enables the machine room air conditioning to be in an efficient, stable and energy-saving operating state all year round.

[0075] The present invention provides a heat recovery system comprising a first heat exchanger 5, which recovers heat from the machine room year-round. In the summer, this heat is recovered to provide domestic hot water for users. In the winter, it provides a heat source for the domestic hot water system (heat supply pipe 24) and the air conditioning system 2, recovering waste heat from the machine room. The machine room air conditioner emits a large amount of heat year-round during cooling. This heat is discharged into the outdoor atmosphere, causing waste heat pollution to the surrounding environment and wasting energy. In today's climate of energy conservation and emission reduction, fully utilizing this heat can significantly reduce system operating costs and improve energy efficiency.

[0076] Air conditioning system 2 and domestic hot water system: Air conditioning system 2, this system can provide cooling and heating for users. When heating in winter, priority is given to recovering the heat discharged from the machine room. If it is insufficient, air source heating (at the fifth heat exchanger 7) can be started. When cooling in summer, the cooling tower 9 can be activated, and the fan of the fifth heat exchanger 7 can also be activated to provide cold source cooling for the system. At the same time, in summer, the heat from the machine room can be recovered through the hot water inlet 20 and the return water outlet 21 to provide hot water for users. One system with multiple functions solves the cooling, heating and domestic hot water needs of users, reduces costs, and avoids multiple systems for one user, which increases unnecessary initial investment. At the same time, the multi-source system (air source, heat recovery, cooling tower (the cooling tower here can also be replaced by other renewable water sources)) can flexibly select the energy system according to the on-site energy situation and user load conditions.

[0077] Dual-source advantages: The computer room air conditioning system utilizes two sources: soil and air, which complement each other to compensate for deficiencies and ensure stable and efficient operation. The comfort air conditioning system utilizes air, heat recovery, and cooling towers, allowing for flexible selection of energy systems based on on-site energy availability and user load.

[0078] The heat recovery system of the present invention comprises the following components: a heat exchange assembly 0 outside the data center, a heat exchange assembly 1 inside the data center, and a first heat exchanger 5. The first heat exchanger 5 is connected to an air conditioning system 2. The data center air conditioner provides year-round cooling for the data center, while the comfort air conditioner provides users with cooling in the summer and heating in the winter, providing a highly efficient year-round system. The specific implementation scheme is as follows:

[0079] 1. Summer

[0080] 1) Computer room air conditioning: ① When the outdoor weather is hot and harsh in the summer, for example, when the outdoor temperature is greater than 35°C: the computer room air conditioning uses the soil source as a cold source, the fifth control valve 16 and the sixth control valve 17 are opened, the seventh control valve 18 and the eighth control valve 19 are closed, and the refrigerant flows into the soil source device 22 to condense and release heat, and evaporates and absorbs the heat in the data room at the third heat exchanger 3 to achieve the purpose of cooling. ② When the outdoor temperature is suitably lower than 35°C: use the air source as a cold source, the fifth control valve 16 and the sixth control valve 17 are closed, the seventh control valve 18 and the eighth control valve 19 are opened, and the refrigerant condenses and releases heat through the second heat exchanger 4, and evaporates and absorbs the heat in the data room at the third heat exchanger 3 to achieve the purpose of cooling. When the outdoor temperature is greater than 35°C or lower than 35°C, heat recovery is in operation;

[0081] 2) Heat recovery: At the same time, the first water pump 10 is turned on, the ninth control valve 23 is opened, the first control valve 12 and the second control valve 13 are closed, and the refrigerant condenses and releases heat at the first heat exchanger 5. The condensation heat of the computer room air conditioner is recovered through the first heat exchanger 5 through the domestic hot water supply pipe 24 to provide domestic hot water for users.

[0082] 3) Comfort air conditioning: In this case, comfort air conditioning provides summer cooling. ① When the water source is sufficient or a renewable water source is available, the cooling tower can be used first (the cooling tower can be replaced by another renewable water source). The fan of the fifth heat exchanger 7 is turned off. At this time, the third control valve 14 and the fourth control valve 15 are opened, and the second water pump 11 is started. The cooling water passes through the fourth heat exchanger 6 to absorb the condensation heat. The refrigerant passes through the fourth heat exchanger 6 to condense and release heat. The refrigerant passes through the sixth heat exchanger 8 to evaporate and absorb the user's indoor heat. The air-conditioned water passes through the water inlet 20 and the return water outlet 21 to cool the user. ② When the water source is insufficient or there is no water source, air source cooling is used. At this time, the fan of the fifth heat exchanger 7 is turned on, the third control valve 14 and the fourth control valve 15 are opened, and the second water pump 11 is turned off. The refrigerant condenses and releases heat in the fifth heat exchanger 7. The refrigerant evaporates in the sixth heat exchanger 8 to absorb the user's indoor heat. The air-conditioned water passes through the water inlet 20 and the return water outlet 21 to cool the user. The fifth heat exchanger 7 is a condenser during cooling and an evaporator during heating. In the fourth heat exchanger 6, the refrigerant and water are in different spaces, and the two exchange heat without mixing.

[0083] 2. Winter

[0084] 1) Computer room air conditioning: ① When the outdoor temperature is high in winter, for example, when the outdoor temperature is greater than 10°C: the computer room air conditioning uses the soil source as a cooling source, the fifth control valve 16 and the sixth control valve 17 are opened, the seventh control valve 18 and the eighth control valve 19 are closed, and the refrigerant flows into the soil source device 22 to condense and release heat. The refrigerant evaporates at the third heat exchanger 3 and absorbs heat in the data room, achieving the purpose of cooling. ② When the outdoor temperature is below 10°C: the air source is used as a cooling source, the fifth control valve 16 and the sixth control valve 17 are closed, the seventh control valve 18 and the eighth control valve 19 are opened, and the refrigerant condenses and releases heat through the second heat exchanger 4. The refrigerant evaporates at the third heat exchanger 3 and absorbs heat in the data room, achieving the purpose of cooling.

[0085] 2) Heat Recovery and Comfort Air Conditioning: The recovered heat is divided into two parts: one for providing domestic hot water to users, and the other for providing heat for air conditioning. The amount of heat allocated here is determined by user demand and the amount of heat recovered.

[0086] ① When the heat recovery capacity is sufficient to meet the user's hot water and air conditioning heat loads (i.e., heat recovery heat ≥ domestic hot water heat + air conditioning heat load):

[0087] Domestic hot water: Heat recovery is used to supply domestic hot water. The first water pump 10 is turned on, the ninth control valve 23 is opened, the first control valve 12 and the second control valve 13 are opened, the third control valve 14 and the fourth control valve 15 are closed, and the second water pump 11 is turned off. The refrigerant condenses and releases heat at the first heat exchanger 5. The hot water passes through the first heat exchanger 5 and the domestic hot water supply pipe 24 to recover the condensation heat of the computer room air conditioner to provide domestic hot water for users.

[0088] Comfortable air conditioning and heating: Heat recovery is used for air conditioning and heating. The fan of the fifth heat exchanger 7 is turned off, and the refrigerant evaporates in the fourth heat exchanger 6, absorbing heat. The refrigerant condenses in the sixth heat exchanger 8, releasing heat. The air-conditioned water flows through the user-side water inlet 20 and return water outlet 21 to heat the user. The refrigerant loop is: fourth heat exchanger 6 - fifth heat exchanger 7 - sixth heat exchanger 8 - fourth heat exchanger 6; the heat recovery water loop is: first heat exchanger 5 - first pump body 10-12 - fourth heat exchanger 6 - second control valve 13 - first heat exchanger 5.

[0089] ② When the heat recovery amount ≤ domestic hot water heat

[0090] Domestic hot water: Domestic hot water is produced using the recovered heat. At this time, the first water pump 10 is turned on, the ninth control valve 23 is opened, the first control valve 12 and the second control valve 13 are closed, and the refrigerant condenses and releases heat at the first heat exchanger 5. The hot water passes through the first heat exchanger 5 and the domestic hot water supply pipe 24 to recover the condensation heat of the computer room air conditioner to provide domestic hot water for users.

[0091] Comfort air conditioning heating: Use air source for heating. At this time, turn on the fan of the fifth heat exchanger 7, open the third control valve 14 and the fourth control valve 15, and turn off the second water pump 11. The refrigerant evaporates and absorbs heat in the fifth heat exchanger 7, and condenses and releases heat in the sixth heat exchanger 8. The air-conditioned water passes through the user-side water inlet 20 and the return water outlet 21 to heat the user.

[0092] ③ When the amount of domestic hot water is less than the amount of heat recovered and less than the amount of domestic hot water + the heat load of air conditioning, the heat recovered will be used first to produce domestic hot water, and the excess will be used for air conditioning heating.

[0093] Domestic hot water: Domestic hot water is produced using the recovered heat. The first water pump 10 is turned on, the ninth control valve 23 is opened, and the refrigerant condenses and releases heat at the first heat exchanger 5. The hot water passes through the first heat exchanger 5 and the domestic hot water supply pipe 24 to recover the condensation heat of the computer room air conditioner to provide domestic hot water for users.

[0094] Comfort air conditioning heating: Heat recovery provides part of the air conditioning heating capacity, and the insufficient heating capacity is provided by the air source. In this case, the air source is used for heating. At this time, the first control valve 12 and the second control valve 13 are opened, the fan of the fifth heat exchanger 7 is turned on, the third control valve 14 and the fourth control valve 15 are opened, and the second water pump 11 is closed. The refrigerant evaporates and absorbs heat at the fifth heat exchanger 7 and the fourth heat exchanger 6, and condenses and releases heat at the sixth heat exchanger 8. The air-conditioned water passes through the user-side water inlet 20 and the return water inlet 21 to heat the user.

[0095] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A heat recovery system, characterized in that: include: A heat exchange component (0) outside the machine room, a heat exchange component (1) inside the machine room, and an air conditioning system (2), wherein the heat exchange component (0) outside the machine room is connected to the heat exchange component (1) inside the machine room to form a first air conditioning loop to adjust the temperature inside the machine room, wherein the heat exchange component (0) outside the machine room comprises a soil source device (22) and a second heat exchanger (4), wherein the soil source device (22) has a first end and a second end, and the second heat exchanger (4) has a third end and a fourth end, wherein the first end is connected to the third end via a first pipeline, and the second end is connected to the fourth end via a second pipeline, and the refrigerant in the first air conditioning loop can be heat exchanged via the soil source device (22) and / or the second heat exchanger (4); The heat recovery system further comprises a first heat exchanger (5), the first heat exchanger (5) being arranged on the first air-conditioning circuit, the first heat exchanger (5) being connected to the air-conditioning system (2), and the first heat exchanger (5) being capable of using the heat in the first air-conditioning circuit to heat domestic hot water and / or providing a heat load for the air-conditioning system (2); The air-conditioning system (2) comprises a fourth heat exchanger (6), a fifth heat exchanger (7) and a sixth heat exchanger (8), wherein the fourth heat exchanger (6), the fifth heat exchanger (7) and the sixth heat exchanger (8) are connected in series to form a second air-conditioning circuit, and the fourth heat exchanger (6) comprises a seventh end and an eighth end, wherein the seventh end is connected to the inlet end of the first heat exchanger (5) through a fifth pipe, and the eighth end is connected to the outlet end of the first heat exchanger (5) through a sixth pipe; The sixth heat exchanger (8) is provided with a heat supply pipeline, the heat supply pipeline having a water inlet and a water return outlet. When the heat recovery system is used in winter, the heat supply pipeline can exchange heat with the sixth heat exchanger (8) to provide heat to the interior of the civil building; The sixth pipeline is connected to a water supply pipe (24), and the water supply pipe (24) can exchange heat between domestic water and the first heat exchanger (5) to heat the domestic water. The water supply pipe (24) is provided with a ninth control valve (23). The sixth pipeline is provided with a first pump body (10), and the first pump body (10) is located between the ninth control valve (23) and the first heat exchanger (5). The sixth pipeline is provided with a first control valve (12); the connection point between the water supply pipe (24) and the sixth pipeline is located between the first control valve (12) and the first pump body (10); and the fifth pipeline is provided with a second control valve (13); The air conditioning system (2) further comprises a cooling tower (9), the inlet of the cooling tower (9) being connected to the sixth pipeline via a seventh pipeline, and the connection point between the seventh pipeline and the sixth pipeline being located between the first control valve (12) and the fourth heat exchanger (6), the seventh pipeline being provided with a third control valve (14), the outlet of the cooling tower (9) being connected to the fifth pipeline via an eighth pipeline, the fifth pipeline being provided with a second pump body (11) and a fourth control valve (15), and the connection point between the eighth pipeline and the fifth pipeline being located between the second control valve (13) and the fourth heat exchanger (6).

2. The heat recovery system according to claim 1, characterized in that: The heat exchange assembly (1) inside the machine room includes a third heat exchanger (3), the third heat exchanger (3) having a fifth end and a sixth end, the fifth end being connected to the first pipeline through a third pipeline, a sixth control valve (17) and an eighth control valve (19) being provided on the first pipeline, and the eighth control valve (19) being located on the first pipeline near the third end relative to the sixth control valve (17), the third pipeline being connected between the sixth control valve (17) and the eighth control valve (19), the sixth end being connected to the second pipeline through a fourth pipeline, a fifth control valve (16) and a seventh control valve (18) being provided on the second pipeline, the seventh control valve (18) being located on the second pipeline near the fourth end relative to the fifth control valve (16), and the fourth pipeline being connected between the fifth control valve (16) and the seventh control valve (18).

3. The heat recovery system according to claim 2, characterized in that: When the heat recovery system is used in summer and the outdoor real-time temperature is greater than a first preset temperature, the fifth control valve (16) and the sixth control valve (17) are opened, the seventh control valve (18) and the eighth control valve (19) are closed, and the first air-conditioning circuit exchanges heat through the soil source device (22); when the outdoor real-time temperature does not exceed the first preset temperature, the fifth control valve (16) and the sixth control valve (17) are closed, the seventh control valve (18) and the eighth control valve (19) are opened, and the first air-conditioning circuit exchanges heat through the second heat exchanger (4); When the heat recovery system is used in winter and the outdoor real-time temperature is greater than a second preset temperature, the fifth control valve (16) and the sixth control valve (17) are opened, the seventh control valve (18) and the eighth control valve (19) are closed, and the first air-conditioning circuit exchanges heat through the soil source device (22); when the outdoor real-time temperature does not exceed the second preset temperature, the fifth control valve (16) and the sixth control valve (17) are closed, the seventh control valve (18) and the eighth control valve (19) are opened, and the first air-conditioning circuit exchanges heat through the second heat exchanger (4).

4. The heat recovery system according to claim 1, characterized in that: When the air-conditioning system (2) is cooling and the condensing pressure of the fifth heat exchanger (7) is higher than the starting pressure of the fifth heat exchanger (7), the third control valve (14), the second pump body (11) and the fourth control valve (15) are opened, the fan on the fifth heat exchanger (7) is closed, and the second air-conditioning circuit exchanges heat through the cooling tower (9) and the fourth heat exchanger (6); when the condensing pressure of the fifth heat exchanger (7) is not higher than the starting pressure of the fifth heat exchanger (7), the third control valve (14), the second pump body (11) and the fourth control valve (15) are closed, the fan on the fifth heat exchanger (7) is opened, and the second air-conditioning circuit exchanges heat through the fifth heat exchanger (7).

5. The heat recovery system according to claim 1, characterized in that: When the air conditioning system (2) is heating: When the heat recovered by the first heat exchanger (5) is greater than the sum of the heat required for domestic hot water and the heat required for heating by the air-conditioning system (2), the first control valve (12) and the second control valve (13) are opened, the fan on the fifth heat exchanger (7) is turned off, the third control valve (14), the second pump body (11) and the fourth control valve (15) are closed, and the heat recovered by the first heat exchanger (5) is exchanged with the fourth heat exchanger (6) to cause the sixth heat exchanger (8) to condense and release heat; When the heat recovered by the first heat exchanger (5) does not exceed the heat required for domestic hot water, the first control valve (12) and the second control valve (13) are closed, the fan on the fifth heat exchanger (7) is turned on, and the refrigerant in the second air-conditioning circuit exchanges heat with the fourth heat exchanger (6) and then exchanges heat with the fifth heat exchanger (7), so that the sixth heat exchanger (8) condenses and releases heat; When the heat recovered by the first heat exchanger (5) is greater than the heat required for domestic hot water and less than the sum of the heat required for domestic hot water and the heat required for heating by the air-conditioning system (2), the first control valve (12) and the second control valve (13) are opened, the fan on the fifth heat exchanger (7) is turned on, the third control valve (14) and the fourth control valve (15) are closed, the second pump body (11) is closed, and the refrigerant in the second air-conditioning circuit exchanges heat with the fourth heat exchanger (6) and the fifth heat exchanger (7), so as to condense and release heat in the sixth heat exchanger (8).

6. The control method of a heat recovery system according to any one of claims 1 to 5, characterized in that: include, A judgment step of detecting the working state of the air conditioning system (2); The control step comprises adjusting the heat exchange mode of the heat exchange component (0) outside the machine room and adjusting the cooling source of the air conditioning system (2) when the air conditioning system (2) is cooling; and adjusting the heat exchange mode of the heat exchange component (0) outside the machine room and adjusting the heating source of the air conditioning system (2) when the air conditioning system (2) is heating.

7. The control method of the heat recovery system according to claim 6, characterized in that: When the air conditioning system (2) is cooling, the heat exchange mode of the heat exchange component (0) outside the machine room is adjusted, specifically according to the following implementation, when the heat exchange component (0) outside the machine room includes a soil source device (22) and a second heat exchanger (4), and the heat exchange component (1) inside the machine room includes a third heat exchanger (3): A determination step of determining a relationship between the outdoor real-time temperature and a first preset temperature; Control step: when the outdoor real-time temperature is greater than a first preset temperature, the fifth control valve (16) and the sixth control valve (17) are opened, the seventh control valve (18) and the eighth control valve (19) are closed, and the first air-conditioning circuit exchanges heat through the soil source device (22); when the outdoor real-time temperature does not exceed the first preset temperature, the fifth control valve (16) and the sixth control valve (17) are closed, the seventh control valve (18) and the eighth control valve (19) are opened, and the first air-conditioning circuit exchanges heat through the second heat exchanger (4).

8. The control method of the heat recovery system according to claim 6, characterized in that: When the air-conditioning system (2) is cooling, the cooling source of the air-conditioning system (2) is adjusted, specifically according to the following implementation, when a first control valve (12) is provided on the sixth pipeline, and the air-conditioning system (2) further includes a cooling tower (9): a judging step of judging the relationship between the condensing pressure of the fifth heat exchanger (7) and the starting pressure of the fifth heat exchanger (7); Control step: when the condensing pressure of the fifth heat exchanger (7) is higher than the starting pressure of the fifth heat exchanger (7), the third control valve (14), the second pump body (11) and the fourth control valve (15) are opened, the fan on the fifth heat exchanger (7) is closed, and the second air-conditioning circuit exchanges heat through the cooling tower (9) and the fourth heat exchanger (6); when the condensing pressure of the fifth heat exchanger (7) is not higher than the starting pressure of the fifth heat exchanger (7), the third control valve (14), the second pump body (11) and the fourth control valve (15) are closed, the fan on the fifth heat exchanger (7) is opened, and the second air-conditioning circuit exchanges heat through the fifth heat exchanger (7).

9. The control method of the heat recovery system according to claim 6, characterized in that: When the air conditioning system (2) is heating, the heat exchange mode of the heat exchange component (0) outside the machine room is adjusted, specifically according to the following implementation, when the heat exchange component (0) outside the machine room includes a soil source device (22) and a second heat exchanger (4), and the heat exchange component (1) inside the machine room includes a third heat exchanger (3): a determination step of determining a relationship between the outdoor real-time temperature and a second preset temperature; Control step: when the outdoor real-time temperature is greater than the second preset temperature, the fifth control valve (16) and the sixth control valve (17) are opened, the seventh control valve (18) and the eighth control valve (19) are closed, and the first air-conditioning circuit exchanges heat through the soil source device (22); when the outdoor real-time temperature does not exceed the second preset temperature, the fifth control valve (16) and the sixth control valve (17) are closed, the seventh control valve (18) and the eighth control valve (19) are opened, and the first air-conditioning circuit exchanges heat through the second heat exchanger (4).

10. The control method of the heat recovery system according to claim 6, characterized in that: When the air-conditioning system (2) is heating, the heat source of the air-conditioning system (2) is adjusted, specifically according to the following implementation, when a first control valve (12) is provided on the sixth pipeline, and the air-conditioning system (2) further includes a cooling tower (9): a judging step of judging the relationship between the heat recovered by the first heat exchanger (5), the heat required for domestic hot water, and the heat required for heating by the air-conditioning system (2); A control step, when the heat recovered by the first heat exchanger (5) is greater than the sum of the heat required for domestic hot water and the heat required for heating by the air-conditioning system (2), the first control valve (12) and the second control valve (13) are opened, the fan on the fifth heat exchanger (7) is turned off, the third control valve (14), the second pump body (11) and the fourth control valve (15) are closed, and the heat recovered by the first heat exchanger (5) is exchanged with the fourth heat exchanger (6) to cause the sixth heat exchanger (8) to condense and release heat; When the heat recovered by the first heat exchanger (5) does not exceed the heat required for domestic hot water, the first control valve (12) and the second control valve (13) are closed, the fan on the fifth heat exchanger (7) is turned on, and the refrigerant in the second air-conditioning circuit exchanges heat with the fourth heat exchanger (6) and then exchanges heat with the fifth heat exchanger (7), so that the sixth heat exchanger (8) condenses and releases heat; When the heat recovered by the first heat exchanger (5) is greater than the heat required for domestic hot water and less than the sum of the heat required for domestic hot water and the heat required for heating by the air-conditioning system (2), the first control valve (12) and the second control valve (13) are opened, the fan on the fifth heat exchanger (7) is turned on, the third control valve (14) and the fourth control valve (15) are closed, the second pump body (11) is closed, and the refrigerant in the second air-conditioning circuit exchanges heat with the fourth heat exchanger (6) and the fifth heat exchanger (7), so as to condense and release heat in the sixth heat exchanger (8).

Images