Cooling and heating system

Abstract

The embodiment of the utility model provides a cooling and heating system. The cooling and heating system comprises an indirect evaporative cooling air conditioner, an exhaust shaft and an exhaust chamber. An air source heat pump is arranged in the exhaust chamber, a first heat exchanger is arranged in the indirect evaporative cooling air conditioner, and the air source heat pump communicates with the first heat exchanger through a first output pipeline; the indirect evaporative cooling air conditioner is communicated with the exhaust shaft through a first exhaust pipeline; an indoor air port of the indirect evaporative cooling air conditioner communicates with the machine room, and an outdoor side air supply port of the indirect evaporative cooling air conditioner communicates with the external environment. The air source heat pump is used for transmitting a refrigerant for heating or cooling the first heat exchanger to the first heat exchanger; the indirect evaporative cooling air conditioner is used for providing cooling and heating functions for the machine room based on the temperature of the first heat exchanger through the indoor air port and the outdoor side air supply port; and air is exhausted to the air exhaust shaft based on the first air exhaust pipeline. The cooling and heating system is used for avoiding internal moisture condensation of the indirect evaporative cooling air conditioner and improving the working efficiency of the indirect evaporative cooling air conditioner.

Description

Technical Field

[0001] This application relates to the fields of heat exchange technology and air conditioning technology, and in particular to a cooling and heating system. Background Art

[0002] With the booming development of the digital economy, the advancement of various new technologies has driven the rapid development of data centers. The construction of data centers requires air conditioning to cool the server rooms.

[0003] However, during the process of cooling the computer room, water droplets will condense inside the air conditioner, which is called condensation; this will affect the normal operation of the air conditioner.

[0004] Therefore, there is an urgent need for a technical solution to prevent water droplets from condensing inside the air conditioner in order to ensure its normal operation. Utility Model Content

[0005] The cooling and heating system provided in this application embodiment is used to avoid condensation inside the indirect evaporative cooling air conditioner, thereby improving the working efficiency of the indirect evaporative cooling air conditioner.

[0006] In a first aspect, embodiments of this application provide a cooling and heating system, including: an indirect evaporative cooling air conditioner, an exhaust shaft, and an exhaust chamber;

[0007] An air source heat pump is installed in the exhaust chamber, and a first heat exchanger is installed in the indirect evaporative cooling air conditioner. The air source heat pump is connected to the first heat exchanger through a first output pipe. The indirect evaporative cooling air conditioner is connected to the exhaust shaft through a first exhaust pipe. The indoor air outlet of the indirect evaporative cooling air conditioner is connected to the machine room, and the outdoor air outlet of the indirect evaporative cooling air conditioner is connected to the external environment.

[0008] An air source heat pump is used to transfer refrigerant to a first heat exchanger through a first output pipe, thereby heating or cooling the first heat exchanger.

[0009] An indirect evaporative cooling air conditioner is used to provide cooling and heating functions to the computer room based on the temperature of the first heat exchanger through indoor air outlets and outdoor air outlets; and to exhaust air to the exhaust shaft through the first exhaust duct.

[0010] The cooling and heating system provided in this application incorporates an indirect evaporative cooling air conditioner, an exhaust shaft, and an exhaust chamber. An air-source heat pump is installed in the exhaust chamber and connected to a first heat exchanger to raise or lower its temperature. Based on the temperature change of the first heat exchanger, the temperature of the air entering the indirect evaporative cooling air conditioner from the outdoor air outlet is adjusted. This prevents condensation inside the air conditioner due to low ambient air temperatures in winter and avoids low efficiency due to high ambient air temperatures in summer. Based on these technical means, the operating efficiency of the indirect evaporative cooling air conditioner can be guaranteed. Attached Figure Description

[0011] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0012] Figure 1 Schematic diagram of the cooling and heating system provided in this application Figure 1 ;

[0013] Figure 2 Schematic diagram of the cooling and heating system provided in this application Figure 2 .

[0014] Figure label:

[0015] 1: Indirect evaporative cooling air conditioner; 2: Heat exchange core; 3: Humidification module; 4: Indoor return air vent; 5: Indoor supply air vent; 6: Outdoor return air vent; 7: Outdoor supply air vent; 8: Second air valve; 9: Third air valve; 10: First air valve; 11: Exhaust shaft; 12: Exhaust chamber; 13: Air source heat pump; 14: First valve; 15: Second valve; 16: Third valve; 17: Second heat exchanger; 18: Third heat exchanger; 19: First heat exchanger; 20: Heating water supply pipe; 21: Heating water return pipe; 22: Domestic hot water supply pipe; 23: Domestic hot water return pipe.

[0016] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. Detailed Implementation

[0017] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0018] First, let me explain the terms used in this application:

[0019] Indirect evaporative cooling air conditioning refers to a process in which the cooling capacity of outdoor air is transferred to indoor air through a non-contact heat exchanger, thereby cooling the indoor air. The outdoor air is humidified air obtained through direct evaporative cooling. Furthermore, because the outdoor and indoor air are not in direct contact, the humidity of the indoor air remains constant.

[0020] Air source heat pump: This refers to an energy-saving device that can transfer heat from a lower heat source to a higher heat source. In an air source heat pump, the lower heat source is air.

[0021] Refrigerant: refers to a working medium that can exchange heat with other media within a heat exchanger. Freon can be used as a refrigerant.

[0022] With the booming development of the digital economy, data centers, as the infrastructure supporting its growth, are also experiencing rapid development driven by various new technologies. Data center server rooms house electrical equipment capable of data processing, which requires heat dissipation during operation. Therefore, air conditioning is essential during data center construction to cool the server rooms.

[0023] In one alternative implementation, an indirect evaporative cooling air conditioner is used as the air conditioner for the computer room to cool it down. In an exemplary scenario, the ambient temperature is low in winter. The air temperature entering the indirect evaporative cooling air conditioner through the outdoor air outlet is low, while the air temperature entering through the indoor air outlet is high. When heat exchange occurs in the heat exchange core of the indirect evaporative cooling air conditioner, water droplets will condense inside the air conditioner, i.e., condensation will occur in the heat exchange core, which will affect the normal operation of the indirect evaporative cooling air conditioner.

[0024] The cooling and heating system provided in this application includes an indirect evaporative cooling air conditioner, an exhaust shaft, and an exhaust chamber. An air source heat pump is installed in the exhaust chamber and connected to a first heat exchanger to raise or lower the temperature of the first heat exchanger. Based on the temperature rise or fall of the first heat exchanger, the air temperature entering the indirect evaporative cooling air conditioner from the outdoor air outlet is adjusted to avoid an excessive temperature difference between the outdoor air outlet and the indoor air outlet, thereby preventing condensation inside the indirect evaporative cooling air conditioner.

[0025] The technical solution of this application and how it solves the above-mentioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0026] Figure 1 Schematic diagram of the cooling and heating system provided in this application Figure 1 ,like Figure 1 As shown, the cooling and heating system includes: an indirect evaporative cooling air conditioner 1, an exhaust shaft 11, and an exhaust chamber 12.

[0027] An air source heat pump 13 is installed in the exhaust chamber 12, and a first heat exchanger 19 is installed in the indirect evaporative cooling air conditioner 1. The air source heat pump 13 is connected to the first heat exchanger 19 through a first output pipe. The indirect evaporative cooling air conditioner 1 is connected to the exhaust shaft 11 through a first exhaust pipe. The indoor air outlet of the indirect evaporative cooling air conditioner 1 is connected to the machine room, and the outdoor air outlet 7 of the indirect evaporative cooling air conditioner 1 is connected to the external environment.

[0028] The air source heat pump 13 is used to transfer refrigerant to the first heat exchanger 19 through the first output pipe, so as to heat up or cool down the first heat exchanger 19.

[0029] The indirect evaporative cooling air conditioner 1 is used to provide cooling and heating functions to the computer room based on the temperature of the first heat exchanger 19 through indoor air outlets and outdoor air outlets 7; and to exhaust air to the exhaust shaft 11 through the first exhaust duct.

[0030] For example, such as Figure 1 As shown, the cooling and heating system includes an indirect evaporative cooling air conditioner 1, an exhaust shaft 11, and an exhaust chamber 12. An air source heat pump 13 is installed in the exhaust chamber 12, and the air source heat pump 13 is connected to a first heat exchanger 19 through a first output pipe, thereby transferring refrigerant to the first heat exchanger 19 to raise or lower its temperature. It can be understood that the refrigerant is a working medium, and Freon can be selected as the refrigerant transferred by the air source heat pump to the first heat exchanger.

[0031] For example, such as Figure 1 As shown, the first heat exchanger 19 is located near the outdoor air outlet 7 of the indirect evaporative cooling air conditioner 1, and the outdoor air outlet 7 is directly connected to the external environment. It can be understood that when the air from the outside environment enters the indirect evaporative cooling air conditioner through the outdoor air outlet, it passes through the first heat exchanger, which has already been heated or cooled, thereby achieving the heating or cooling of the air from the outside environment.

[0032] Because the various electrical devices in the computer room generate heat during operation, the air temperature inside the computer room is higher than that of the outside environment. After heat exchange between the outside air and the air inside the computer room, the air temperature inside the computer room decreases and is returned to the computer room through indoor air vents; the outside air temperature rises and is exhausted to the exhaust shaft through the first exhaust duct.

[0033] In one exemplary application scenario, when the ambient temperature is extremely low, the temperature of the ambient air is also extremely low. When this extremely low-temperature ambient air enters the indirect evaporative cooling air conditioner from the outdoor air outlet and exchanges heat with the air inside the computer room, the large temperature difference between the ambient air and the air inside the computer room causes water droplets to condense in the indirect evaporative cooling air conditioner, resulting in condensation. Consequently, the indirect evaporative cooling air conditioner has a poor cooling effect on the air inside the computer room.

[0034] In another exemplary application scenario, when the ambient temperature is high, the ambient air temperature is also high. When the high-temperature ambient air enters the indirect evaporative cooling air conditioner from the outdoor air outlet and exchanges heat with the air in the computer room, the indirect evaporative cooling air conditioner operates inefficiently because the temperature difference between the ambient air and the air in the computer room is small, or the ambient air temperature is higher than the air temperature in the computer room. It cannot cool the air in the computer room to the preset temperature range. The preset temperature range can be set as follows: the air temperature in the computer room should be greater than or equal to 18°C ​​and less than or equal to 27°C.

[0035] For the above-mentioned exemplary application scenario, the temperature of the air entering the external environment from the outdoor air outlet is adjusted by heating and cooling the first heat exchanger, thereby avoiding condensation and ensuring the working efficiency of the indirect evaporative cooling air conditioner.

[0036] The cooling and heating system provided in this application embodiment uses an indirect evaporative cooling air conditioner. A first heat exchanger connected to an air source heat pump is installed at the outdoor air outlet of the indirect evaporative cooling air conditioner. The air source heat pump transfers refrigerant to the first heat exchanger to raise or lower its temperature. The air from the outside environment entering the indirect evaporative cooling air conditioner after passing through the first heat exchanger exchanges heat with the air in the computer room. This avoids condensation on the heat exchange core within the indirect evaporative cooling air conditioner caused by a large temperature difference between the two air streams, thus preventing low efficiency due to condensation. It also avoids the problem of the indirect evaporative cooling air conditioner being unable to cool the air in the computer room due to a high outside ambient temperature, resulting in low efficiency. Therefore, it ensures the efficient operation of the indirect evaporative cooling air conditioner, delivering air to the computer room that meets its temperature requirements.

[0037] Figure 2 Schematic diagram of the cooling and heating system provided in this application Figure 2 ,like Figure 2 As shown, the cooling and heating system includes: an indirect evaporative cooling air conditioner 1, an exhaust shaft 11, and an exhaust chamber 12.

[0038] An air source heat pump 13 is installed in the exhaust chamber 12, and a first heat exchanger 19 is installed in the indirect evaporative cooling air conditioner 1. The air source heat pump 13 is connected to the first heat exchanger 19 through a first output pipe. The indirect evaporative cooling air conditioner 1 is connected to the exhaust shaft 11 through a first exhaust pipe. The indoor air outlet of the indirect evaporative cooling air conditioner 1 is connected to the machine room, and the outdoor air outlet 7 of the indirect evaporative cooling air conditioner 1 is connected to the external environment.

[0039] The air source heat pump 13 is used to transfer refrigerant to the first heat exchanger 19 through the first output pipe, so as to heat up or cool down the first heat exchanger 19.

[0040] The indirect evaporative cooling air conditioner 1 is used to provide cooling and heating functions to the computer room based on the temperature of the first heat exchanger 19 through indoor air outlets and outdoor air outlets 7; and to exhaust air to the exhaust shaft 11 through the first exhaust duct.

[0041] Based on the foregoing embodiments, such as Figure 2 As shown, the indirect evaporative cooling air conditioner 1 is equipped with a heat exchange core 2, in which non-contact heat exchange can be carried out between the air in the outside environment and the air in the machine room.

[0042] Optionally, an outdoor side pipe and an indoor side pipe are respectively installed in the heat exchange core. The air from the outside environment circulates in the outdoor side pipe, and the air in the computer room circulates in the indoor side pipe. The outer walls of the outdoor side pipe and the inner side pipe are in contact with each other, realizing non-contact heat exchange between the air from the outside environment and the air in the computer room.

[0043] Furthermore, such as Figure 2 As shown, a humidification module 3 can also be installed in the outdoor pipe. The humidification module 3 sprays water into the outdoor pipe to cool the ambient air. Then, through non-contact heat exchange, the air in the computer room is cooled down to a temperature within the preset temperature range.

[0044] For example, such as Figure 2 As shown, the indirect evaporative cooling air conditioner 1 can also be provided with an outdoor return air inlet 6, which is connected to the first exhaust duct, so that the indirect evaporative cooling air conditioner 1 is connected to the exhaust shaft 11 through the first exhaust duct.

[0045] Furthermore, such as Figure 2 As shown, the indoor air outlets of the indirect evaporative cooling air conditioner 1 may include: an indoor return air outlet 4 and an indoor supply air outlet 5. It can be understood that the indoor return air outlet of the indirect evaporative cooling air conditioner is connected to the machine room, and the indoor supply air outlet of the indirect evaporative cooling air conditioner is also connected to the machine room. Air in the machine room can enter the indirect evaporative cooling air conditioner through the indoor return air outlet, undergo heat exchange in the heat exchange core, and then return to the machine room through the indoor supply air outlet.

[0046] In one exemplary application scenario, when the ambient temperature is extremely low, the temperature of the air in the outside environment is also low. At this time, the low temperature inside the exhaust fan can cause the air source heat pump to malfunction or operate at low efficiency.

[0047] In one example, the indirect evaporative cooling air conditioner 1 is spatially connected to the exhaust chamber 12 via a second exhaust duct, and a first air valve 10 is installed on the second exhaust duct.

[0048] For example, the operating ambient temperature range of an air source heat pump is 15°C to 25°C, with a minimum operating ambient temperature of 5°C. Therefore, when the ambient temperature is extremely low, resulting in a low temperature inside the exhaust air chamber and preventing the air source heat pump from operating normally, the heat from the hot air discharged through the outdoor return air vent of the indirect evaporative cooling air conditioner can be recovered to raise the temperature inside the exhaust air chamber.

[0049] For example, such as Figure 2 As shown, the outdoor return air vent 6 of the indirect evaporative cooling air conditioner 1 is also connected to the second exhaust duct, which is spatially connected to the exhaust chamber 12. Furthermore, a first air valve 10 is installed on the second exhaust duct to control its opening.

[0050] For a practical application example, when ambient air enters the heat exchange core from the outdoor air inlet and exchanges heat with the air in the machine room, the temperature of the ambient air rises, and it is then exhausted from the outdoor return air inlet. Optionally, the opening degree of the first air valve can be set to 100%, meaning the first air valve is in the open state. At this time, the ambient air after heat exchange is exhausted into the exhaust chamber through the second exhaust duct. This raises the ambient temperature of the exhaust chamber, ensuring that the ambient temperature of the exhaust chamber meets the operating temperature requirements of the air source heat pump.

[0051] It should be noted that when the ambient temperature is suitable, that is, when the temperature of the exhaust room is sufficient to meet the requirements of the air source heat pump, you can choose to close the first air valve or reduce the opening of the first air valve, for example, set the opening of the first air valve to 30%.

[0052] In the example above, by connecting a second exhaust duct to the exhaust chamber, warmed ambient air discharged from the outdoor return air vent can be routed into the exhaust chamber along the second exhaust duct, preventing the air source heat pump from malfunctioning when the temperature in the exhaust chamber is too low. A properly functioning air source heat pump can prevent condensation on the heat exchange core of the indirect evaporative cooling air conditioner when the ambient temperature is low. This ensures the efficiency of the indirect evaporative cooling air conditioner even in low ambient temperatures.

[0053] As illustrated in the foregoing examples, low ambient temperatures in winter can lead to low efficiency for air-source heat pumps and indirect cooling air conditioners. This example, based on a winter usage environment, describes the specific operation of the cooling and heating system provided in this application embodiment when the ambient temperature is low.

[0054] In one example, an air source heat pump is used to transfer refrigerant that heats the first heat exchanger through a first output pipe when the indirect evaporative cooling air conditioner is in its first operating state.

[0055] An indirect evaporative cooling air conditioner is used to exhaust air into the space of the exhaust chamber through a second exhaust duct and a first air valve at a first opening degree when the indirect evaporative cooling air conditioner is in its first working state; wherein the first opening degree is greater than a first preset opening degree.

[0056] For example, an indirect evaporative cooling air conditioner can be set to several different operating states. The first operating state can also be called the first winter mode. In the first winter mode, the ambient temperature is extremely low, and the air source heat pump is in heating mode. In heating mode, the air source heat pump transfers higher-temperature refrigerant to the first heat exchanger through the first output pipe to raise the temperature of the first heat exchanger.

[0057] In one alternative implementation, such as Figure 2As shown, a first valve 14, which is in the open state, is installed on the first output pipe.

[0058] For example, by opening the first valve, the air source heat pump and the first heat exchanger are connected. The refrigerant with a higher temperature can be transferred from the air source heat pump to the first heat exchanger through the first output pipe, thereby raising the temperature of the first heat exchanger.

[0059] Furthermore, based on the first heat exchanger that is heated, the air entering from the outdoor air outlet is heated to appropriately reduce the temperature difference between the outdoor air and the air in the computer room, and to prevent condensation from occurring when the outdoor air and the air in the computer room exchange heat in the heat exchange core.

[0060] For example, in the first winter mode, the outside ambient temperature is extremely low, and the ambient temperature in the exhaust room is also low, which may affect the heating effect of the air source heat pump. Therefore, the opening degree of the first air valve is set to a first opening degree, which is greater than a first preset opening degree. For example, the first preset opening degree can be set to 50%, and the first opening degree can be set to 100%, that is, the first air valve is set to a fully open state. At this time, the heat-exchanged outside ambient air discharged from the outdoor return air vent is exhausted into the exhaust room through the second exhaust duct. This increases the ambient temperature in the exhaust room and ensures the normal operation of the air source heat pump.

[0061] It should be noted that the first preset opening degree and the first opening degree in this example are only used to illustrate the working process of the cooling and heating system, and do not represent a limitation on the specific values ​​of the first preset opening degree and the first opening degree. In practical applications, the values ​​of the first preset opening degree and the first opening degree can be set according to specific circumstances.

[0062] In one alternative implementation, during winter, when the ambient temperature is no longer extremely low, ambient air directly enters the heat exchange core through the outdoor air outlet to exchange heat with the air in the machine room, preventing condensation from forming on the heat exchange core. The indirect evaporative cooling air conditioner can be set to a second winter mode, in which the first valve is closed. That is, the air source heat pump no longer transfers refrigerant to the first heat exchanger through the first output pipe, and the first heat exchanger does not heat up.

[0063] In one alternative implementation, during spring when the ambient temperature is already high, the ambient air cannot cool the air inside the computer room through the heat exchange core. The indirect evaporative cooling air conditioner can be set to a first energy-saving mode. In this mode, the first valve is also kept closed, and the humidification module is activated to spray and cool the ambient air through the outdoor pipes in the heat exchange core. Then, non-contact heat exchange cools the air inside the computer room, and the cooled air is then supplied to the computer room through the indoor return air vent.

[0064] Optionally, in the first energy-saving mode, the opening of the first air valve can be reduced so that when the ambient air is discharged from the outdoor return air vent, most of it is discharged from the exhaust shaft along the first exhaust duct, and a small portion is discharged from the exhaust chamber along the second exhaust duct.

[0065] In the above example, when the indirect evaporative cooling air conditioner is in its first operating state, on the one hand, the air source heat pump heats up the first heat exchanger to heat the air entering the external environment from the outdoor air outlet, thereby avoiding condensation on the heat exchange core; on the other hand, the opening of the first air valve is controlled so that the heat-exchanged external ambient air discharged from the outdoor return air outlet enters the exhaust chamber through the second exhaust duct, raising the ambient temperature in the exhaust chamber and ensuring the normal operation of the air source heat pump.

[0066] As illustrated in the foregoing examples, in summer, the ambient temperature is high, and the temperature of the outside air may be higher than the temperature of the air inside the computer room, making it impossible to cool the air inside the computer room and resulting in low efficiency of the indirect evaporative cooling air conditioner. This example, based on the summer usage environment, describes the specific process of the cooling and heating system provided in this application embodiment operating when the ambient temperature is high.

[0067] In one example, an air source heat pump is used to transfer refrigerant through a first output pipe to a first heat exchanger to cool the first heat exchanger when the indirect evaporative cooling air conditioner is in its second operating state.

[0068] When the indirect evaporative cooling air conditioner is in its second operating state, the first air valve is in a second opening degree; wherein, the second opening degree is less than or equal to the first preset opening degree.

[0069] As illustrated by the foregoing example, indirect evaporative cooling air conditioners can be configured with various operating states. For instance, the second operating state can also be referred to as summer mode. In summer mode, the ambient temperature is high, and the humidification module is on. However, simply using the humidification module to spray and cool the ambient air is insufficient to cool the air inside the server room. At this time, the air source heat pump operates in cooling mode, transferring a lower-temperature refrigerant to the first heat exchanger through the first output pipe to cool the first heat exchanger.

[0070] In one alternative implementation, such as Figure 2 As shown, a first valve 14, which is in the open state, is installed on the first output pipe.

[0071] For example, by opening the first valve, the air source heat pump and the first heat exchanger are in a connected state, and the cooler refrigerant can be transferred from the air source heat pump to the first heat exchanger through the first output pipe to cool the first heat exchanger.

[0072] Furthermore, the first heat exchanger, which is used for cooling, cools the ambient air entering from the outdoor air outlet to prevent the ambient air temperature from exceeding the temperature of the air inside the computer room. The cooled ambient air then undergoes a second cooling process within the heat exchange core via a humidification module. This two-stage cooling process allows for heat exchange between the ambient air and the air inside the computer room, thus further cooling the air within the computer room.

[0073] For example, in summer mode, high ambient temperatures can lead to high temperatures in both the outside and exhaust vent spaces, potentially affecting the cooling performance of the air source heat pump. Therefore, the opening degree of the first air valve is set to a second opening degree, where the first opening degree is less than or equal to a first preset opening degree. For instance, the first preset opening degree can be set to 50%, and the second opening degree can be set to 0, effectively closing the first air valve completely. In this case, the heat-exchanged ambient air exhausted from the outdoor return air vent is only vented to the exhaust shaft through the first exhaust duct. This prevents excessively high ambient temperatures in the exhaust vent space, thus ensuring the normal operation of the air source heat pump.

[0074] In one alternative implementation, considering the water shortage in some areas and the fact that water quality in some areas does not meet the spray cooling requirements of the humidification module, the indirect evaporative cooling air conditioner can be set to a water-saving mode. In this mode, the humidification module is turned off. That is, only the air source heat pump transfers a lower-temperature refrigerant to the first heat exchanger to cool it down, thereby cooling the ambient air. Based on the cooled ambient air, heat exchange occurs between the ambient air and the air in the machine room within the heat exchange core, thus cooling the air in the machine room.

[0075] In the above example, when the indirect evaporative cooling air conditioner is in its second operating state, on the one hand, the air source heat pump cools down the first heat exchanger, thereby cooling the air entering the external environment from the outdoor air outlet, thus ensuring the heat exchange efficiency between the air in the external environment and the air in the machine room; on the other hand, the opening of the first air valve is controlled so that the heat-exchanged external air discharged from the outdoor return air outlet enters the exhaust shaft through the first exhaust duct, avoiding excessively high ambient temperature in the exhaust room and ensuring the normal operation of the air source heat pump.

[0076] As can be seen from the foregoing examples, the air source heat pump operates in heating mode in both the first and second winter modes. In both modes, the heat generated by the air source heat pump is used to heat the heating water supply within the building housing the equipment room, or to heat the domestic hot water supply within the building. Based on the foregoing examples, this example explains how the heat generated by the air source heat pump is used to heat the heating water supply.

[0077] In one example, such as Figure 2 As shown, a second heat exchanger 17 is also installed in the exhaust chamber 12; the air source heat pump 13 is connected to the second heat exchanger 17 through the second output pipe; the second heat exchanger 17 is connected to the heating water supply pipe 20 and the heating water return pipe 21 respectively.

[0078] The air source heat pump 13 is also used to transfer refrigerant to the second heat exchanger 17 through the second output pipe, so as to heat the water in the heating water supply pipe 20.

[0079] For example, when the indirect evaporative cooling air conditioner is in its first operating state, i.e., in its first winter mode, the air source heat pump is in heating mode. The air source heat pump transfers a higher-temperature refrigerant to the second heat exchanger through the second output pipe, thereby raising the temperature of the second heat exchanger.

[0080] In one alternative implementation, such as Figure 2 As shown, a second valve 15 is installed on the second output pipe.

[0081] For example, with the second valve in the open state, the air source heat pump and the second heat exchanger are in a connected state, and the high-temperature refrigerant can be transferred from the air source heat pump to the second heat exchanger through the second output pipe to raise the temperature of the second heat exchanger.

[0082] Furthermore, the second heat exchanger is connected to both the heating supply water pipe and the heating return water pipe. It should be noted that the second heat exchanger is connected to an air-source heat pump via copper pipes. The air-source heat pump transfers the higher-temperature refrigerant into the copper pipes of the second heat exchanger through a second output pipe. The heating supply water pipe and the heating return water pipe are directly connected to the inner cavity of the second heat exchanger. It can be understood that the interior of the second heat exchanger can be divided into an inner copper pipe area and an outer copper pipe area. The refrigerant flows in the inner copper pipe area, and the heating supply water flows in the outer copper pipe area. This achieves non-contact heat exchange between the refrigerant and the heating supply water, thereby raising the temperature of the water in the heating supply water pipe.

[0083] It should be noted that in the aforementioned example, when the indirect evaporative cooling air conditioner is in the second winter mode, the first valve is controlled to be closed and the second valve is controlled to be open. At this time, the refrigerant of the air source heat pump is transferred to the second heat exchanger through the second output pipe at a higher temperature, so as to raise the temperature of the second heat exchanger, thereby raising the temperature of the water in the heating water supply pipe.

[0084] It should also be noted that in the aforementioned example, when the indirect evaporative cooling air conditioner is in the first energy-saving mode, the second valve is closed. At this time, the refrigerant from the air source heat pump is no longer transferred to the second heat exchanger through the second output pipe.

[0085] It should also be noted that in the aforementioned example, when the indirect evaporative cooling air conditioner is in its second operating state, i.e., in summer mode, the air source heat pump is in cooling mode. The first valve is controlled to be open, and the second valve is controlled to be closed. At this time, the refrigerant from the air source heat pump is transferred to the first heat exchanger through the first output pipe at a lower temperature to cool the first heat exchanger. It can be understood that in summer mode, there is no need to provide heating for the building where the machine room is located.

[0086] In the example above, by setting up a second heat exchanger connected to the air source heat pump and connecting the second heat exchanger to both the heating supply pipe and the heating return pipe, the heat generated by the air source heat pump can be used to heat the heating water in the heating supply pipe. This enables the cooling and heating system to simultaneously cool the air in the computer room and heat the heating water supply in the building where the computer room is located.

[0087] Building on the previous example, this example explains how the heat generated by an air source heat pump can be used to heat domestic hot water.

[0088] In one example, such as Figure 2 As shown, a third heat exchanger 18 is also installed in the exhaust chamber 12; the air source heat pump 13 is connected to the third heat exchanger 18 through the third output pipe; the third heat exchanger 18 is connected to the domestic hot water supply pipe 22 and the domestic hot water return pipe 23 respectively.

[0089] The air source heat pump 13 is also used to transfer refrigerant to the third heat exchanger 18 through the third output pipe, so as to heat the water in the domestic hot water supply pipe 22.

[0090] For example, when the indirect evaporative cooling air conditioner is in its first operating state, i.e., in its first winter mode, the air source heat pump is in heating mode. The air source heat pump transfers a higher-temperature refrigerant to the third heat exchanger through the third output pipe, thereby raising the temperature of the third heat exchanger.

[0091] In one alternative implementation, such as Figure 2 As shown, a third valve 16 is installed on the third output pipe.

[0092] For example, with the third valve in the open state, the air source heat pump and the third heat exchanger are in a connected state, and the high-temperature refrigerant can be transferred from the air source heat pump to the third heat exchanger through the third output pipe to raise the temperature of the third heat exchanger.

[0093] Furthermore, the third heat exchanger is connected to both the domestic hot water supply pipe and the domestic hot water return pipe. It should be noted that the third heat exchanger is connected to an air-source heat pump via copper pipes. The air-source heat pump transfers the higher-temperature refrigerant into the copper pipes of the third heat exchanger through the third output pipe. The domestic hot water supply and return pipes are directly connected to the inner cavity of the third heat exchanger. In essence, the interior of the third heat exchanger can be divided into an inner copper pipe area and an outer copper pipe area. Refrigerant flows in the inner copper pipe area, while domestic hot water flows in the outer copper pipe area. This achieves non-contact heat exchange between the refrigerant and the domestic hot water, thereby raising the temperature of the water in the domestic hot water supply pipe.

[0094] In one alternative implementation, during winter, when the ambient temperature is not extremely cold, heating is no longer required in the building housing the computer room. The indirect evaporative cooling air conditioner can be set to a second energy-saving mode. In this mode, the first valve and the second valve are both closed, while the third valve is open. At this time, the refrigerant from the air source heat pump is transferred to the third heat exchanger through the third output pipe, where a higher-temperature refrigerant is used to raise the temperature of the third heat exchanger, thereby raising the temperature of the water in the domestic hot water supply pipe. That is, in the second energy-saving mode, the heat energy generated by the air source heat pump is only used for heating domestic hot water.

[0095] It should be noted that in the aforementioned example, when the indirect evaporative cooling air conditioner is in the first energy-saving mode, the on / off states of the first valve, the second valve, and the third valve are the same as in the second energy-saving mode, and will not be repeated here.

[0096] It should also be noted that in the aforementioned example, when the indirect evaporative cooling air conditioner is in the second winter mode, the first valve is controlled to be closed, and the second valve and the third valve are controlled to be open. At this time, the refrigerant from the air source heat pump is transferred to the second heat exchanger through the second output pipe at a higher temperature, thereby raising the temperature of the second heat exchanger and thus the water in the heating water supply pipe; and the refrigerant from the air source heat pump is transferred to the third heat exchanger through the third output pipe at a higher temperature, thereby raising the temperature of the third heat exchanger and thus the water in the domestic hot water supply pipe. That is, in the second winter mode, the heat energy generated by the air source heat pump is used simultaneously for heating both the heating water supply and domestic hot water.

[0097] It should also be noted that in the aforementioned example, when the indirect evaporative cooling air conditioner is in its second operating state, i.e., in summer mode, the air source heat pump is in cooling mode. The first valve is controlled to be open, the second valve to be closed, and the third valve to be closed. At this time, the refrigerant from the air source heat pump is transferred to the first heat exchanger through the first output pipe at a lower temperature to cool the first heat exchanger. It can be understood that in summer mode, there is no need for heating or domestic hot water supply to the building where the computer room is located.

[0098] In the example above, by setting up a third heat exchanger connected to the air source heat pump and connecting the third heat exchanger to both the domestic hot water supply pipe and the domestic hot water return pipe, the heat generated by the air source heat pump can be used to heat the domestic hot water in the domestic hot water supply pipe. This enables the cooling and heating system to simultaneously cool the air in the computer room and heat the domestic hot water in the building where the computer room is located.

[0099] It should be noted that the functions of providing heating water and providing domestic hot water in the two examples above can be implemented separately or in combination.

[0100] In the two examples above, the second heat exchanger connected to the air source heat pump can heat the heating water supply pipes; the third heat exchanger connected to the air source heat pump can heat the domestic hot water pipes. This achieves the cooling and heating system providing cooling for the air in the computer room while simultaneously heating the heating water supply or domestic hot water supply for the building where the computer room is located.

[0101] In one example, such as Figure 2 As shown, the indirect evaporative cooling air conditioner 1 of the cooling and heating system is equipped with an outdoor return air vent 6, a third air valve 9 is installed on the first exhaust duct, and a second air valve 8 is installed at the connection between the first exhaust duct and the exhaust shaft 11.

[0102] For example, the indirect evaporative cooling air conditioner is equipped with an outdoor return air vent, which is connected to the first exhaust duct and the second exhaust duct. A third air valve is installed on the first exhaust duct, which is normally open. A second air valve is installed at the connection between the first exhaust duct and the exhaust shaft.

[0103] Based on the description of the first air valve in the previous example, it can be seen that when the third air valve is open, the exhaust air of the indirect evaporative cooling air conditioner can be controlled by controlling the opening degree of the first air valve and the second air valve respectively.

[0104] In one optional embodiment, the second air valve is in a third opening degree when the indirect evaporative cooling air conditioner is in a first operating state; the third opening degree is less than or equal to the second preset opening degree.

[0105] Taking a practical application example, when the indirect evaporative cooling air conditioner is in its first working state, that is, when the indirect evaporative cooling air conditioner is in its first winter mode, the first air valve is at its first opening degree, which is greater than the first preset opening degree; the second air valve is at its third opening degree, which is less than or equal to the second preset opening degree.

[0106] It should be noted that the specific values ​​of the second preset opening and the first preset opening can be the same or different.

[0107] For example, the first preset opening can be set to 50%, the second preset opening can be set to 100%, the third preset opening can also be set to 50%, and the fourth preset opening can be set to 0%. At the same time, the third air valve is in the open state.

[0108] Understandably, in this mode, the first and third air valves are open, while the second air valve is closed. At this time, the air from the outside environment that has undergone heat exchange in the heat exchange core is exhausted into the exhaust chamber through the second exhaust duct via the outdoor return air vent.

[0109] It should be noted that when the indirect evaporative cooling air conditioner is in the first energy-saving mode, the second air valve is controlled to be open, and the opening of the first air valve is controlled to be reduced. When the ambient air is discharged from the outdoor return air vent, most of it is discharged from the exhaust shaft along the first exhaust duct, and a small part is discharged from the exhaust chamber along the second exhaust duct.

[0110] In one optional embodiment, the second air valve is in a fourth opening degree when the indirect evaporative cooling air conditioner is in a second working state; the fourth opening degree is greater than the second preset opening degree.

[0111] Taking a practical application example, when the indirect evaporative cooling air conditioner is in the second working state, that is, when the indirect evaporative cooling air conditioner is in summer mode, the first air valve is in the second opening degree, which is less than or equal to the first preset opening degree; the second air valve is in the fourth opening degree, which is greater than the second preset opening degree.

[0112] For example, the second opening degree can be set to 0; the fourth opening degree can be set to 100%. At the same time, the third air valve is in the open state.

[0113] Understandably, in this mode, the second and third air valves are open, while the first air valve is closed. At this time, the air from the outside environment that has undergone heat exchange in the heat exchange core is exhausted into the exhaust shaft through the first exhaust duct via the outdoor return air vent.

[0114] In the example above, by installing a second and a third air valve in the first exhaust duct, the second and third air valves can be used together with the first air valve to control how the heat-exchanged ambient air is discharged from the outdoor return air vent in different modes of the indirect evaporative cooling air conditioner. This can avoid the poor operating efficiency of the air source heat pump caused by excessively cold ambient temperatures in winter and excessively hot ambient temperatures in summer.

[0115] The cooling and heating system provided in this application embodiment, by installing a first heat exchanger connected to an air source heat pump at the outdoor air outlet of the indirect evaporative cooling air conditioner, can heat the ambient air in winter, avoiding condensation in the heat exchange core; and can cool the ambient air in summer, avoiding low heat exchange efficiency of the heat exchange core. Furthermore, by installing different air valves in the exhaust duct connected to the outdoor return air outlet of the indirect evaporative cooling air conditioner, and controlling the opening of these valves according to different operating modes, the heat from the heated ambient air can be transferred to the exhaust chamber where the air source heat pump is located to raise the temperature in winter, ensuring the normal operation of the air source heat pump. Based on the above technical means, the working efficiency of the indirect evaporative cooling air conditioner can be effectively improved. Moreover, while the indirect evaporative cooling air conditioner cools the air in the machine room, the heat energy generated by the air source heat pump can also heat the heating water supply and domestic hot water of the building where the machine room is located, realizing the system's cooling and heating functions.

[0116] Finally, it should be noted that other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and alterations may be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A cooling and heating system, characterized in that, include: Indirect evaporative cooling air conditioning, exhaust shaft, exhaust chamber; An air source heat pump is installed in the exhaust chamber, and a first heat exchanger is installed in the indirect evaporative cooling air conditioner. The air source heat pump is connected to the first heat exchanger through a first output pipe. The indirect evaporative cooling air conditioner is connected to the exhaust shaft through a first exhaust pipe. The indoor air outlet of the indirect evaporative cooling air conditioner is connected to the machine room, and the outdoor air outlet of the indirect evaporative cooling air conditioner is connected to the external environment. The air source heat pump is used to transfer refrigerant to the first heat exchanger through the first output pipe, so as to heat up or cool down the first heat exchanger. The indirect evaporative cooling air conditioner is used to provide cooling and heating functions to the computer room based on the temperature of the first heat exchanger through the indoor air outlet and the outdoor air outlet; and to exhaust air to the exhaust shaft based on the first exhaust duct.

2. The system according to claim 1, characterized in that, The indirect evaporative cooling air conditioner is connected to the space of the exhaust chamber through a second exhaust duct, and a first air valve is installed on the second exhaust duct.

3. The system according to claim 2, characterized in that, The air source heat pump is used to transfer refrigerant that causes the first heat exchanger to heat up through the first output pipe when the indirect evaporative cooling air conditioner is in the first working state. The indirect evaporative cooling air conditioner is used to exhaust air into the space of the exhaust chamber through a second exhaust duct and a first air valve at a first opening degree when the indirect evaporative cooling air conditioner is in a first working state; wherein, the first opening degree is greater than a first preset opening degree.

4. The system according to claim 2, characterized in that, The air source heat pump is used to transfer refrigerant to the first heat exchanger through the first output pipe to cool the first heat exchanger when the indirect evaporative cooling air conditioner is in the second working state. When the indirect evaporative cooling air conditioner is in its second operating state, the first air valve is at a second opening degree; wherein the second opening degree is less than or equal to the first preset opening degree.

5. The system according to claim 1, characterized in that, The first output pipe is equipped with a first valve that is in the open state.

6. The system according to claim 1, characterized in that, The exhaust chamber is also equipped with a second heat exchanger; the air source heat pump is connected to the second heat exchanger through a second output pipe; the second heat exchanger is connected to the heating water supply pipe and the heating water return pipe respectively; The air source heat pump is also used to transfer refrigerant through the second output pipe to the second heat exchanger to heat the water in the heating water supply pipe.

7. The system according to claim 6, characterized in that, A second valve is installed on the second output pipe.

8. The system according to claim 1, characterized in that, The exhaust chamber is also equipped with a third heat exchanger; the air source heat pump is connected to the third heat exchanger through a third output pipe; the third heat exchanger is connected to the domestic hot water supply pipe and the domestic hot water return pipe respectively. The air source heat pump is also used to transfer refrigerant through the third output pipe to the third heat exchanger to raise the temperature of the water in the domestic hot water supply pipe.

9. The system according to claim 8, characterized in that, A third valve is installed on the third output pipe.

10. The system according to any one of claims 1-9, characterized in that, The indirect evaporative cooling air conditioner is provided with an outdoor return air vent, the first exhaust duct is provided with a third air valve, and the connection between the first exhaust duct and the exhaust shaft is provided with a second air valve. The second air valve is in a third opening degree when the indirect evaporative cooling air conditioner is in the first working state; the third opening degree is less than or equal to the second preset opening degree. The second air valve is in a fourth opening degree when the indirect evaporative cooling air conditioner is in a second working state; the fourth opening degree is greater than the second preset opening degree.

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