A heating and cooling device

Abstract

The application discloses a heating and cooling device with a first system and a second system, and the heating and cooling device comprises a heat exchanger, which is internally provided with a first flow path and a second flow path, the first flow path and the second flow path are cross arranged, the first flow path is connected with a refrigerant flow path of the first system, and the second flow path is connected with a refrigerant flow path of the second system; wherein, when the first system operates in a refrigeration mode and the second system operates in a heating mode, the heat exchanger serves as an evaporator of the first system, and the heat exchanger serves as a condenser of the second system. The heat exchanger is used as the condenser and the evaporator of the two systems respectively, and the heat exchange efficiency of the two systems can be improved respectively through the cross flow paths in the heat exchanger.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cooling and heating equipment, and particularly relates to a cooling and heating equipment. BACKGROUND

[0002] Traditional air-cooled heat pump / air conditioning systems widely use finned heat exchangers as their core heat exchange components, which are designed for heat exchange with natural air. However, this design has significant efficiency and challenge under certain seasonal conditions. In summer, when the air conditioning system is in cooling mode, the outdoor finned heat exchanger acts as a condenser, responsible for discharging the heat generated in the refrigeration process to the outside. At this time, due to the high outdoor air temperature, the temperature difference between the heat exchanger and the air decreases, resulting in a significant reduction in heat exchange efficiency, thus greatly reducing the cooling capacity and energy efficiency of the air conditioning system.

[0003] Similarly, in winter heating mode, the outdoor finned heat exchanger is converted into an evaporator for absorbing heat from outdoor air for indoor use. However, as the outdoor temperature decreases, the heat capacity of the air also decreases, further increasing the difficulty of heat exchange, resulting in a severe decline in the heating capacity and energy efficiency of the heat pump system. More seriously, in a low-temperature and humid environment, the surface of the finned evaporator is prone to frost and even icing. As the frost and ice layer thickens, not only does it severely hinder heat exchange, resulting in a sharp decline in system heating capacity, but it also increases the system's energy consumption, and may even cause system failure due to factors such as blocked air ducts and increased mechanical load, leading to heat pump shutdown. CONTENT OF THE INVENTION

[0004] The purpose of the embodiments of the present application is to provide a cooling and heating equipment, which uses one heat exchanger as the condenser and evaporator of two systems respectively, and through the cross-flow path inside the heat exchanger, the heat exchange efficiency of the two systems can be improved respectively.

[0005] To achieve the above purpose, the following technical solutions are adopted in the present application:

[0006] On the one hand, a cooling and heating equipment is provided, which has a first system and a second system, and comprises: a heat exchanger, which is internally provided with a first flow path and a second flow path, the first flow path and the second flow path are cross arranged, the first flow path is connected with a refrigerant flow path of the first system, and the second flow path is connected with a refrigerant flow path of the second system; wherein, when the first system runs in cooling mode and the second system runs in heating mode, the heat exchanger acts as an evaporator of the first system, and the heat exchanger acts as a condenser of the second system.

[0007] Further, the first flow path comprises a plurality of rows of first branch flow paths arranged at intervals, and the second flow path comprises a plurality of rows of second branch flow paths, one row of the second branch flow paths being arranged between two adjacent rows of the first branch flow paths.

[0008] Further, the first branch flow paths in the same row are arranged at intervals, the second branch flow paths in the same row are arranged at intervals, and the first branch flow paths and the second branch flow paths are arranged in a staggered manner.

[0009] Further, the heat exchanger is a fin heat exchanger.

[0010] Further, the first system comprises a first compressor, a first use-side heat exchanger, and a first throttling element, an exhaust port of the first compressor is connected to the first use-side heat exchanger, the first throttling element, and the heat exchanger in sequence through pipelines, and an inlet port of the first compressor is connected to an outlet end of the heat exchanger.

[0011] Further, the first use-side heat exchanger is a double-pipe heat exchanger, and / or the first throttling element is an electronic expansion valve.

[0012] Further, the second system comprises a second compressor, a second use-side heat exchanger, and a second throttling element, an exhaust port of the second compressor is connected to the heat exchanger, the second throttling element, and the second use-side heat exchanger in sequence through pipelines, and an inlet port of the second compressor is connected to an outlet end of the second use-side heat exchanger.

[0013] Further, the second use-side heat exchanger is a double-pipe heat exchanger, and / or the second throttling element is an electronic expansion valve.

[0014] Further, a four-way valve is arranged in each of the first system and the second system, and the four-way valve is used to control the flow direction of refrigerant.

[0015] Further, when the first system and the second system operate in a cooling mode at the same time, the heat exchanger simultaneously serves as an evaporator of the first system and the second system; when the first system and the second system operate in a heating mode at the same time, the heat exchanger simultaneously serves as a condenser of the first system and the second system.

[0016] The beneficial effects of the present application are: the device comprises a first system and a second system, and the core is the heat exchanger inside, which innovatively sets a cross first flow path and a second flow path, the first flow path is connected with the refrigerant flow path of the first system, and the second flow path is connected with the refrigerant flow path of the second system. When the first system is in the refrigeration mode and the second system is in the heating mode, the heat exchanger ingeniously plays a dual role: for the first system, it works as an evaporator, and the low-temperature refrigerant flows in the first flow path and exchanges heat with the air. Due to the heat radiation effect of the high-temperature refrigerant in the second flow path, the temperature of the air around the first flow path is increased compared with the natural air, which not only increases the temperature difference between the low-temperature refrigerant and the air, significantly enhances the heat exchange effect, ensures the high energy efficiency of the heat pump heating, but also effectively slows down the frosting and icing phenomenon on the surface of the evaporator, ensuring the stable operation of the system.

[0017] At the same time, for the second system, the heat exchanger works as a condenser, and the high-temperature refrigerant flows in the second flow path and releases heat to the air. The heat radiation effect of the low-temperature refrigerant in the first flow path makes the temperature of the air around the second flow path relatively lower, further increasing the temperature difference between the high-temperature refrigerant and the air, thereby optimizing the heat exchange performance of the condenser and ensuring the high energy efficiency of the refrigeration. This cross flow path design not only significantly improves the heat exchange efficiency and reduces the energy consumption, but also enhances the stability and durability of the system by slowing down the frosting and icing phenomenon.

[0018] In addition, this design simplifies the system structure of the device, reduces the manufacturing cost and maintenance difficulty, and at the same time gives the system higher flexibility, which can flexibly switch between refrigeration and heating modes according to actual needs, meeting the diversified needs of users in different seasons and weather conditions. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described in detail below according to the drawings and embodiments.

[0020] Figure 1 The cross-sectional schematic diagram of the heat exchanger described in the embodiments of the present application;

[0021] Figure 2 The system schematic diagram of the cooling and heating device described in the embodiments of the present application.

[0022] In the figure: 1, heat exchanger; 101, first flow path; 102, second flow path; 2, first system; 201, first compressor; 202, first use side heat exchanger; 203, first throttling element; 3, second system; 301, second compressor; 302, second use side heat exchanger; 303, second throttling element. DETAILED DESCRIPTION

[0023] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects reached more clear, the technical solutions of the embodiments of the present application are further described in detail below. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0024] In the description of the present application, unless explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrated; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] In the present application, unless explicitly defined and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0026] As shown in Figure 1 , Figure 2 The present embodiment provides a cooling and heating device having a first system 2 and a second system 3, which comprises a heat exchanger 1, which is internally provided with a first flow path 101 and a second flow path 102, the first flow path 101 and the second flow path 102 are cross arranged, the first flow path 101 is connected with the refrigerant flow path of the first system 2, and the second flow path 102 is connected with the refrigerant flow path of the second system 3; wherein when the first system 2 runs in cooling mode and the second system 3 runs in heating mode, the heat exchanger 1 serves as the evaporator of the first system 2, and the heat exchanger 1 serves as the condenser of the second system 3.

[0027] Based on the above scheme, the device comprises a first system 2 and a second system 3, the core of which is a unique heat exchanger 1, which is ingeniously arranged with a cross first flow path 101 and a second flow path 102 inside, and the two flow paths are respectively connected with the refrigerant flow path of the first system 2 and the refrigerant flow path of the second system 3, forming a high-efficiency heat exchange mechanism. When the first system 2 (such as a household air conditioning refrigeration system) runs in a refrigeration mode, the low-temperature refrigerant flows in the first flow path 101 in the heat exchanger 1, and absorbs heat from the surrounding air as an evaporator, evaporates the refrigerant, and achieves the refrigeration effect. At the same time, the second system 3 (such as a household air conditioning heating system or a hot water supply system) runs in a heating mode, and the high-temperature refrigerant flows through the second flow path 102, which acts as a condenser to transfer heat to the surrounding air, condenses the refrigerant, and releases heat to achieve heating.

[0028] Especially important is that the design of the cross flow path causes the low-temperature refrigerant in the first flow path 101 to have a thermal radiation effect with the high-temperature refrigerant in the second flow path 102, which not only increases the temperature of the air around the first flow path 101, increases the temperature difference between the low-temperature refrigerant and the air, and significantly improves the heat exchange efficiency of the evaporator of the first system 2 as the first system 2, ensuring high energy efficiency of the device in the heating mode; At the same time, it also reduces the temperature of the air around the second flow path 102, increases the temperature difference between the high-temperature refrigerant and the air, and effectively improves the heat exchange efficiency of the condenser of the second system 3 as the second system 3, ensuring high performance in the refrigeration mode.

[0029] In addition, this design also has additional advantages in the winter heating mode: due to the thermal radiation effect of the low-temperature refrigerant in the first flow path 101, the surface temperature of the heat exchanger 1 as the evaporator of the first system 2 is relatively high, effectively slowing down the occurrence of frost and ice, not only prolonging the continuous operation time of the device, but also significantly improving the stability and reliability of the system.

[0030] Further, as Figure 1As shown, the first flow path 101 includes multiple rows of first branch flow paths arranged at intervals, and the second flow path 102 includes multiple rows of second branch flow paths, one row of the second branch flow paths being arranged between two adjacent rows of the first branch flow paths. The first flow path 101 is not only a continuous path, but also consists of multiple rows of first branch flow paths arranged at intervals. Such a design increases the surface area of the first flow path 101 in contact with air, which is conducive to more fully absorbing or releasing heat. At the same time, the second flow path 102 also adopts a similar design and consists of multiple rows of second branch flow paths. However, more ingeniously, one row of second branch flow paths is ingeniously arranged between two adjacent rows of first branch flow paths. Such a cross layout not only maximizes the use of the internal space of the heat exchanger 1, but also ensures that the heat radiation effect between the first flow path 101 and the second flow path 102 can be most effectively utilized. Under such a layout, when the first system 2 is in a cooling mode and the low-temperature refrigerant flows in the first branch flow path, it can not only exchange heat with the air flowing through, but also transfer part of the cold energy to the high-temperature refrigerant in the adjacent second branch flow path through the heat radiation effect. Such heat transfer not only helps to reduce the temperature of the air around the first branch flow path and improve the heat exchange efficiency of the evaporator, but also to a certain extent, pre-cools the high-temperature refrigerant in the second branch flow path, preparing for the subsequent condensation process.

[0031] Similarly, when the second system 3 is in a heating mode and the high-temperature refrigerant flows in the second branch flow path, it can not only release heat to the air, but also transfer part of the heat to the low-temperature refrigerant in the adjacent first branch flow path through the heat radiation effect. Such heat transfer helps to increase the temperature of the air around the first branch flow path, further improves the heat exchange efficiency of the evaporator, and to a certain extent, preheats the low-temperature refrigerant in the first branch flow path, providing more favorable conditions for the subsequent evaporation process.

[0032] In summary, by adopting the cross layout design of multiple rows of first branch flow paths and multiple rows of second branch flow paths, the cooling and heating device in the embodiment of the present application not only further improves the heat exchange efficiency of the heat exchanger 1, but also optimizes the heat radiation effect, realizes the energy transfer and cooperative work between the first system 2 and the second system 3, and thus improves the energy efficiency and stability of the entire cooling and heating device.

[0033] Further, in addition to the above-mentioned cross layout of multiple rows of first branch flow paths and multiple rows of second branch flow paths, multiple first branch flow paths in the same row are distributed at intervals, multiple second branch flow paths in the same row are distributed at intervals, and adjacent first branch flow paths and second branch flow paths are arranged staggered. The staggered arrangement design not only enhances heat exchange, but also helps to reduce the overall size and weight of the heat exchanger 1. Since the second branch flow path is staggered with the first branch flow path, the staggered cross arrangement can maximize the use of available space inside the heat exchanger 1 under the premise of ensuring heat exchange efficiency, or in other words, the first branch flow path and the second branch flow path can be reasonably installed in a smaller heat exchanger, reducing the amount of material used for the heat exchanger 1, thereby reducing manufacturing costs.

[0034] Specifically, the heat exchanger 1 is a finned heat exchanger. A finned heat exchanger is a high-efficiency heat exchange device widely used in refrigeration and air conditioning systems. Its structural feature is that a large number of fins are attached to the outer surface of the heat exchange pipe, which greatly increases the heat exchange area of the heat exchanger 1, thereby improving the heat exchange efficiency. The design of the fins usually takes into account the flow characteristics of the air and the heat exchange requirements. The shape, size, spacing, and arrangement of the fins will affect the flow resistance of the air, the heat exchange coefficient, and the overall heat exchange performance. In the design of the finned heat exchanger, in combination with the cross layout of multiple rows of first branch flow paths and multiple rows of second branch flow paths, a high-efficiency, compact heat exchange structure is formed. For the first branch flow path and the second branch flow path, the presence of the fins not only increases the contact area between them and the air, but also through the heat conduction of the fins, the heat in the refrigerant can be transferred to the air more quickly, or heat can be absorbed from the air. At the same time, the arrangement and shape design of the fins also help to guide the flow of air, so that the air can pass through the heat exchanger 1 more evenly, reducing flow resistance and improving heat exchange efficiency.

[0035] In some embodiments, the first system 2 includes a first compressor 201, a first usage-side heat exchanger 202, and a first throttling element 203. The exhaust port of the first compressor 201 is connected to the first usage-side heat exchanger 202, the first throttling element 203, and the heat exchanger 1 in sequence through pipelines. The outlet end of the heat exchanger 1 is connected to the suction port of the first compressor 201. When the first system 2 is in a refrigeration mode, the first compressor 201 compresses the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant, which is then discharged into the first usage-side heat exchanger 202. In the first usage-side heat exchanger 202, the high-temperature and high-pressure gaseous refrigerant becomes high-temperature and high-pressure liquid refrigerant through a heat release process, while absorbing the heat of the usage side (such as indoor or in-vehicle), achieving a refrigeration effect. Then, the high-temperature and high-pressure liquid refrigerant is throttled by the first throttling element 203, and both the pressure and temperature are reduced, becoming low-temperature and low-pressure liquid or gas-liquid mixed state refrigerant. Then, the refrigerant enters the heat exchanger 1, which works as an evaporator at this time. In the heat exchanger 1, the low-temperature and low-pressure refrigerant evaporates by absorbing heat from the air, becoming low-temperature and low-pressure gaseous refrigerant, while reducing the temperature of the air, achieving further refrigeration effect. Finally, the low-temperature and low-pressure gaseous refrigerant flows out of the outlet end of the heat exchanger 1, and through the pipeline, it returns to the suction port of the first compressor 201 again, completing a refrigeration cycle. In this process, the first system 2 achieves the purpose of absorbing heat from the usage side and releasing heat to the air through the heat exchanger 1 by continuously circulating the refrigerant.

[0036] In some embodiments, the first usage-side heat exchanger 202 is a double-pipe heat exchanger, and / or the first throttling element 203 is an electronic expansion valve. The double-pipe heat exchanger is a heat exchange device with simple structure and high efficiency, mainly composed of an inner pipe and an outer pipe. The fluid (in this scheme, the refrigerant) that needs to be heated or cooled usually flows in the inner pipe, while another fluid (in this scheme, usually air or water) flows in the outer pipe. When the two fluids flow in the double-pipe heat exchanger, heat exchange occurs between them, achieving temperature change. When the electronic expansion valve is used as the first throttling element 203, it can accurately adjust the flow and pressure of the refrigerant according to the actual needs of the system. For example, in the refrigeration mode, when the temperature and pressure of the refrigerant in the first usage-side heat exchanger 202 reach a certain level, the electronic expansion valve will automatically reduce the opening, thereby reducing the flow and pressure of the refrigerant, avoiding system overload and energy efficiency reduction. At the same time, the electronic expansion valve can also intelligently adjust according to environmental temperature, load changes, and other factors, ensuring that the heat pump equipment maintains high energy efficiency and stability under different working conditions.

[0037] In addition, the second system 3 is also designed as a complete refrigeration cycle, but it is different from the first system 2, and it is mainly used in heating mode. The second system 3 includes a second compressor 301, a second use-side heat exchanger 302 (which is mainly used as a condenser in this system, when the second system 3 is in heating mode), a second throttling element 303 (which is also used to adjust the flow and pressure of the refrigerant), and the heat exchanger 1 (which is mainly used as a condenser in this system, contrary to the first system 2).

[0038] Specifically, the exhaust port of the second compressor 301 is first connected to the heat exchanger 1 through a pipeline. When the second system 3 is in heating mode, the second compressor 301 compresses the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant, and discharges it into the heat exchanger 1. In the heat exchanger 1, the high-temperature and high-pressure gaseous refrigerant transfers heat to the air (or other media, such as water, etc.) through the heat release process, and at the same time, it is condensed into high-temperature and high-pressure liquid refrigerant. Then, the high-temperature and high-pressure liquid refrigerant is throttled by the second throttling element 303, and its pressure and temperature are reduced, becoming low-temperature and low-pressure liquid or gas-liquid mixed state refrigerant. Then, these refrigerants enter the second use-side heat exchanger 302, which is working as a condenser at this time. In the second use-side heat exchanger 302, the low-temperature and low-pressure refrigerant is re-evaporated into low-temperature and low-pressure gaseous refrigerant by absorbing heat from the heat source (such as an electric heater, a solar heat collector, etc.), while releasing heat to the use side (such as a water heater), achieving the heating effect. Finally, the low-temperature and low-pressure gaseous refrigerant flows out from the outlet end of the second use-side heat exchanger 302, and through the pipeline, it returns to the suction port of the second compressor 301 again, completing a heating cycle. In this process, the second system 3 achieves the purpose of absorbing heat from the heat source and releasing heat to the use side through the second use-side heat exchanger 302 by continuously circulating the refrigerant.

[0039] Similarly, the second use-side heat exchanger 302 is a double-pipe heat exchanger; and / or the second throttling element 303 is an electronic expansion valve.

[0040] It is worth mentioning that the first system 2 of the air conditioning device can be applied to indoor refrigeration, and the second system 3 can be applied to heating water.

[0041] Preferably, a four-way valve is arranged in each of the first system 2 and the second system 3, and the four-way valve is used to control the flow direction of the refrigerant. Through the switching of the four-way valve, the two systems of the air conditioning device can easily switch between refrigeration and heating modes, meeting the use requirements in different seasons and weather conditions. At the same time, the introduction of the four-way valve also makes the air conditioning device more flexible and efficient in dealing with complex working conditions, for example, in some cases, it may be necessary to provide refrigeration and heating services to two different areas at the same time, and the four-way valve can help to realize such complex cold and heat demand matching.

[0042] Optionally, when the first system 2 and the second system 3 run the refrigeration mode at the same time, the heat exchanger 1 simultaneously serves as the evaporator of the first system 2 and the second system 3; when the first system 2 and the second system 3 run the heating mode at the same time, the heat exchanger 1 simultaneously serves as the condenser of the first system 2 and the second system 3. By designing the heat exchanger 1 to be able to flexibly switch its role (evaporator or condenser) according to the operation mode of the system when the first system 2 and the second system 3 run at the same time, the cold and warm device described in the present application not only improves the energy efficiency and flexibility of the system, but also provides users with a more comfortable and energy-saving use experience.

[0043] It is particularly important to note that, since the heat exchanger 1 can be used as an evaporator and a condenser in the two systems at the same time, i.e., the functions of the traditional condenser and evaporator are integrated into a single heat exchanger 1, thereby significantly reducing the volume and space occupied by the device, which is undoubtedly a great advantage for those application scenarios with limited space or pursuing efficient space utilization.

[0044] In summary, the present application not only solves the problem of significant decline in air conditioning refrigeration capacity and energy efficiency due to high outdoor ambient temperature in summer, ensuring stable air conditioning refrigeration, but also solves the problem of significant decline in heat pump heating capacity and energy efficiency due to low outdoor ambient temperature in winter, ensuring stable heat pump heating. At the same time, it also solves the problem of frost and ice formation of the heat pump and a series of heat pump failures caused thereby, ensuring high capacity and energy efficiency and stability of the heat pump heating.

[0045] In the description herein, it should be understood that the terms "upper", "lower", "left", "right", and the like orientation or position relationship are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0046] In the description of the present application, the description referring to the terms "an embodiment", "an example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0047] In addition, it should be understood that, although the present application is described in terms of embodiments, each embodiment does not necessarily contain only one independent technical solution, and the description of the present application is only for the sake of clarity, and those skilled in the art should consider the present application as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0048] The technical principles of the present application are described above in conjunction with specific embodiments. These descriptions are only to explain the principles of the present application and cannot be interpreted as limiting the protection scope of the present application in any way. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without any creative effort, and these embodiments will all fall within the protection scope of the present application.

Claims

1. A heating and cooling device having a first system (2) and a second system (3), characterized in that, The cold and warm device comprises a heat exchanger (1) internally provided with a first flow path (101) and a second flow path (102), the first flow path (101) and the second flow path (102) are cross arranged, the first flow path (101) is connected with a refrigerant flow path of the first system (2), the second flow path (102) is connected with a refrigerant flow path of the second system (3); wherein, when the first system (2) operates in a refrigeration mode and the second system (3) operates in a heating mode, the heat exchanger (1) serves as an evaporator of the first system (2), and the heat exchanger (1) serves as a condenser of the second system (3).

2. The cooling and heating device according to claim 1, characterized in that The first flow path (101) comprises a plurality of rows of first branch flow paths arranged at intervals, and the second flow path (102) comprises a plurality of rows of second branch flow paths, one row of the second branch flow paths being arranged between two adjacent rows of the first branch flow paths.

3. The cooling and heating device according to claim 2, characterized in that The plurality of first branch flow paths in the same row are arranged at intervals, the plurality of second branch flow paths in the same row are arranged at intervals, and the adjacent first branch flow path and the second branch flow path are arranged in a staggered manner.

4. The cooling and heating device according to claim 1, wherein The heat exchanger (1) is a fin heat exchanger.

5. The cooling and heating device according to any one of claims 1 to 4, characterized in that The first system (2) comprises a first compressor (201), a first use side heat exchanger (202) and a first throttling element (203), an exhaust port of the first compressor (201) is connected with the first use side heat exchanger (202), the first throttling element (203) and the heat exchanger (1) in sequence through pipelines, and an outlet end of the heat exchanger (1) is connected with a suction port of the first compressor (201).

6. The heating and cooling device of claim 5, wherein, The first use side heat exchanger (202) is a double-pipe heat exchanger; and / or the first throttling element (203) is an electronic expansion valve.

7. The cooling and heating device according to any one of claims 1 to 4, characterized in that The second system (3) comprises a second compressor (301), a second use side heat exchanger (302) and a second throttling element (303), an exhaust port of the second compressor (301) is connected with the heat exchanger (1), the second throttling element (303) and the second use side heat exchanger (302) in sequence through pipelines, and an outlet end of the second use side heat exchanger (302) is connected with a suction port of the second compressor (301).

8. The cooling and heating device according to claim 7, characterized in that The second use side heat exchanger (302) is a double-pipe heat exchanger; and / or the second throttling element (303) is an electronic expansion valve.

9. The cooling and heating device according to any one of claims 1 to 4, characterized in that A four-way valve is arranged in the first system (2) and the second system (3), and the four-way valve is used for controlling the flow direction of the refrigerant.

10. The cooling and heating device according to any one of claims 1 to 4, characterized in that When the first system (2) and the second system (3) operate in a refrigeration mode at the same time, the heat exchanger (1) simultaneously serves as an evaporator of the first system (2) and the second system (3); when the first system (2) and the second system (3) operate in a heating mode at the same time, the heat exchanger (1) simultaneously serves as a condenser of the first system (2) and the second system (3).

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