Energy supply device and energy supply system

Abstract

The utility model discloses an energy supply device and an energy supply system, the energy supply device comprises a first pipeline and a second pipeline, the first pipeline is provided with a first heat exchanger and a first throttling element, and the second pipeline is provided with a second heat exchanger and a second throttling element; the first heat exchanger is provided with a first heat exchange flow channel and a second heat exchange flow channel, the first heat exchange flow channel is connected with the first pipeline, the second heat exchange flow channel is used for being connected with a terminal device, and a refrigerant flowing through the first heat exchange flow channel can exchange heat with a heat exchange medium flowing through the second heat exchange flow channel; the first temperature detection component is used for detecting the temperature of the heat exchange medium flowing through the second heat exchange runner; and the control unit, the energy supply device has a defrosting mode, and the defrosting mode has a first state, a second state and the like. When no water tank exists, frequent switching can be effectively avoided for defrosting, and reliable defrosting can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of energy supply, and particularly relates to an energy supply device and an energy supply system. Background Art

[0002] In an energy supply system with an energy supply device, the energy supply device is a device capable of outputting air after temperature adjustment and heat exchange medium after temperature adjustment outward. Two heat exchangers are arranged in the energy supply device. Among them, for the flow path where the heat exchanger for outputting the heat exchange medium after temperature adjustment is located, generally, a heat exchange medium storage tank is connected, so that the flow path meets the requirement of having the minimum heat exchange medium capacity, generally more than 60L. This design has the following advantages. On the one hand, connecting the heat exchange medium storage tank can ensure that the energy supply system does not frequently switch to perform defrosting operation on the outdoor unit, and ensure the stability of the system operation. On the other hand, during the defrosting process, the heat exchange medium storage tank can prevent the temperature of the heat exchange medium in this flow path from decreasing too much, so as to ensure the defrosting effect and avoid the outdoor unit not being defrosted cleanly due to too low temperature of the heat exchange medium, which affects the normal operation of the energy supply system.

[0003] However, installing the heat exchange medium storage tank also brings some problems, increasing the user's investment cost and installation cost. In addition, for some flat space, it is generally relatively cramped and inconvenient to install the water tank, which brings certain troubles to the user's use. Summary of the Utility Model

[0004] In order to overcome the above defects of the prior art, the technical problem to be solved by the embodiments of the present utility model is to provide an energy supply device and an energy supply system, which can effectively avoid frequent switching for defrosting without a water tank and can ensure reliable defrosting.

[0005] The specific technical solution of the embodiments of the present utility model is as follows:

[0006] An energy supply device, the energy supply device includes:

[0007] A first pipeline and a second pipeline, the first pipeline is provided with a first heat exchanger and a first throttling element, and the second pipeline is provided with a second heat exchanger and a second throttling element; the first heat exchanger has a first heat exchange flow path and a second heat exchange flow path, the first heat exchange flow path is connected to the first pipeline, and the second heat exchange flow path is used for connecting to an end device, and the refrigerant flowing through the first heat exchange flow path can exchange heat with the heat exchange medium flowing through the second heat exchange flow path;

[0008] A first temperature detection component, the first temperature detection component is used for detecting the temperature of the heat exchange medium flowing through the second heat exchange flow path;

[0009] A control unit, which is electrically connected to the first temperature detection component, the first throttling element, and the second throttling element. The energy supply device has a defrosting mode, and the defrosting mode has a first state and a second state. In the first state, the first throttling element is in an open state, and the second throttling element is in an open state or a closed state; in the second state, the first throttling element is in a closed state, and the second throttling element is in an open state. The control unit is configured to control the energy supply device to be in the first state or the second state based on the temperature of the heat exchange medium flowing through the second heat exchange channel detected by the first temperature detection component when the energy supply device is in the defrosting mode.

[0010] Preferably, the temperature of the heat exchange medium flowing through the second heat exchange channel detected by the first temperature detection component in the second state is lower than a first preset temperature.

[0011] Preferably, the temperature of the heat exchange medium flowing through the second heat exchange channel detected by the first temperature detection component in the first state is higher than a first preset temperature.

[0012] Preferably, the second heat exchanger is a heat exchanger for heat exchange between a refrigerant and air.

[0013] Preferably, the energy supply device includes:

[0014] A driving pump, which is communicated with the second heat exchange channel and electrically connected to the control unit. In the first state, the driving pump is in an operating state.

[0015] Preferably, the energy supply device includes:

[0016] A first blower electrically connected to the control unit, which is used to drive air to flow through the second heat exchanger. In the first state, when the second throttling element is in an open state, the first blower is in a closed state or an operating state; when the second throttling element is in a closed state, the first blower is in a closed state. In the second state, the first blower is in an operating state or a closed state.

[0017] Preferably, in the first state and the second state, when the first blower is in an operating state, the first blower operates at a low speed.

[0018] Preferably, the first throttling element and the second throttling element are electronic expansion valves.

[0019] An energy supply system, which includes the energy supply device as described above;

[0020] A third heat exchanger, one end of the third heat exchanger is communicated with one ends of a first throttle element and a second throttle element of the first pipeline and the second pipeline respectively;

[0021] A compressor and a switching component, the switching component has at least two working positions. When the switching component is in the first working position, the switching component makes the outlet of the compressor communicate with one ends of a first heat exchanger and a second heat exchanger of the first pipeline and the second pipeline respectively, and the inlet of the compressor communicate with the other end of the third heat exchanger; When the switching component is in the second working position, the switching component makes the outlet of the compressor communicate with the other end of the third heat exchanger, and the inlet of the compressor communicate with one ends of the first heat exchanger and the second heat exchanger of the first pipeline and the second pipeline respectively.

[0022] Preferably, the third heat exchanger is a heat exchanger for heat exchange between refrigerant and outdoor air.

[0023] Preferably, the energy supply system includes: an outdoor unit, and the outdoor unit includes the compressor and the third heat exchanger.

[0024] Preferably, the energy supply system includes:

[0025] A second temperature detection component, and the second temperature detection component is used for detecting the temperature of the third heat exchanger.

[0026] Preferably, the control unit is electrically connected to the second temperature detection component and the switching component;

[0027] The control unit is used for switching the switching component from the first working position to the second working position and entering the defrosting mode when the temperature of the third heat exchanger detected by the second temperature detection component is lower than a second preset temperature.

[0028] Preferably, the control unit is used for switching the switching component from the second working position to the first working position when the temperature of the outer surface of the third heat exchanger detected by the second temperature detection component is higher than a third preset temperature, and the third preset temperature is higher than the second preset temperature.

[0029] Preferably, the energy supply system includes:

[0030] An end device, the end device includes a fourth heat exchanger and a second blower, the fourth heat exchanger can be communicated with the second heat exchange flow channel, and the second blower is used for driving air to flow through the fourth heat exchanger.

[0031] Preferably, the energy supply system includes: a third temperature detection component, and the third temperature detection component is used for detecting the temperature of the heat exchange medium flowing through the fourth heat exchanger;

[0032] The control unit is configured to control the second blower based on the temperature of the heat exchange medium flowing through the fourth heat exchanger detected by the third temperature detection component.

[0033] Preferably, when the energy supply device is in the defrosting mode and the temperature of the heat exchange medium flowing through the fourth heat exchanger detected by the third temperature detection component exceeds a fourth preset temperature, the second blower is in an operating state;

[0034] When the energy supply device is in the defrosting mode and the temperature of the heat exchange medium flowing through the fourth heat exchanger detected by the third temperature detection component is lower than the fourth preset temperature, the second blower is in a closed state.

[0035] The technical solution of the present utility model has the following remarkable beneficial effects:

[0036] When the energy supply device is in the heating working state, frost or ice may appear on the outer surface of the third heat exchanger, resulting in too low temperature of the third heat exchanger, and the refrigerant flowing through the third heat exchanger cannot efficiently exchange heat with outdoor air. At this time, the energy supply system and the energy supply device need to enter the defrosting mode. The defrosting mode has a first state and a second state, and the control unit controls the energy supply device to be in the first state or the second state based on the temperature of the heat exchange medium flowing through the second heat exchange channel detected by the first temperature detection component. When the temperature of the heat exchange medium flowing through the second heat exchange channel detected by the first temperature detection component is relatively high, the energy supply device is in the first state. At this time, the refrigerant flowing through the first heat exchange channel of the first heat exchanger absorbs heat from the heat exchange medium flowing through the second heat exchange channel, and the temperature of the heat exchange medium flowing through the second heat exchange channel drops. Coupled with the heat generated by the compressor work, the third heat exchanger is defrosted. As the defrosting progresses, when the temperature of the heat exchange medium flowing through the second heat exchange channel detected by the first temperature detection component is relatively low, the energy supply device is in the second state. At this time, the refrigerant flowing through the second heat exchanger absorbs heat from the air flowing through the second heat exchanger. Although the temperature of the air flowing through the second heat exchanger drops, it will not freeze like the heat exchange medium flowing through the second heat exchange channel may. Coupled with the heat generated by the compressor work, the third heat exchanger is continuously defrosted. Through the above process, it is possible to effectively avoid freezing due to too low temperature drop of the heat exchange medium in the second heat exchange channel in the first state without installing a water tank, and at the same time, the defrosting operation can be continuously carried out for a long time, so as to ensure the defrosting effect on the third heat exchanger and prevent the energy supply system and the energy supply device from frequently switching to enter the defrosting mode.

[0037] With reference to the following description and the accompanying drawings, specific embodiments of the present invention are disclosed in detail, indicating the ways in which the principles of the present invention can be employed. It should be understood that the scope of the embodiments of the present invention is not thereby limited. Features described and / or illustrated for one embodiment can be used in the same or similar manner in one or more other embodiments, combined with the features in other embodiments, or replace the features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure of the present invention in any way. Additionally, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to assist in understanding the present invention, rather than specifically defining the shapes and proportional dimensions of the components of the present invention. Those skilled in the art can, under the teachings of the present invention, select various possible shapes and proportional dimensions according to specific circumstances to implement the present invention.

[0039] Figure 1 It is a schematic diagram of the principle of the energy supply device in the energy supply system in the heating mode in the embodiment of the present invention;

[0040] Figure 2 It is a schematic diagram of the principle of the energy supply device in the energy supply system in the defrosting mode in the embodiment of the present invention.

[0041] Reference numerals in the above drawings:

[0042] 1. First pipeline; 11. First heat exchanger; 111. First heat exchange flow channel; 112. Second heat exchange flow channel; 12. First throttling element; 2. Second pipeline; 21. Second heat exchanger; 22. Second throttling element; 3. First temperature detection component; 4. Switching assembly; 5. Driving pump; 6. First fan; 7. Third heat exchanger; 8. Compressor; 9. Gas-liquid separator. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] Combined with the description of the accompanying drawings and the specific embodiments of the present invention, the details of the present invention can be more clearly understood. However, the specific embodiments of the present invention described herein are only for the purpose of explaining the present invention and cannot be understood in any way as a limitation of the present invention. Under the teaching of the present invention, those skilled in the art can conceive any possible variations based on the present invention, and these should all be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0045] In order to effectively avoid frequent switching for defrosting even without a water tank and ensure reliable defrosting, an energy supply device and an energy supply system are proposed in this application. Figure 1 It is a schematic diagram of the principle of the energy supply device in the energy supply system in the heating mode according to an embodiment of the present invention. Figure 2 It is a schematic diagram of the principle of the energy supply device in the energy supply system in the defrosting mode according to an embodiment of the present invention, as Figure 1 and Figure 2As shown, the energy supply device may include: a first pipeline 1 and a second pipeline 2. The first pipeline 1 is provided with a first heat exchanger 11 and a first throttling element 12. The second pipeline 2 is provided with a second heat exchanger 21 and a second throttling element 22. The first heat exchanger 11 has a first heat exchange channel 111 and a second heat exchange channel 112. The first heat exchange channel 111 is connected to the first pipeline 1. The second heat exchange channel 112 is used to connect to the terminal device. The refrigerant flowing through the first heat exchange channel 111 and the heat exchange medium flowing through the second heat exchange channel 112 can perform heat exchange. A first temperature detection component 3 is used to detect the temperature of the heat exchange medium flowing through the second heat exchange channel 112. A control unit is electrically connected to the first temperature detection component 3, the first throttling element 12, and the second throttling element 22. The energy supply device has a defrosting mode. The defrosting mode has a first state and a second state. In the first state, the first throttling element 12 is in an open state, and the second throttling element 22 is in an open state or a closed state. In the second state, the first throttling element 12 is in a closed state, and the second throttling element 22 is in an open state. The control unit is used to control the energy supply device to be in the first state or the second state based on the temperature of the heat exchange medium flowing through the second heat exchange channel 112 detected by the first temperature detection component 3 when the energy supply device is in the defrosting mode.

[0046] The energy supply system may include the energy supply device as described above. The energy supply system may further include: a third heat exchanger 7. One end of the third heat exchanger 7 is communicated with one end of the first pipeline 1 and the second pipeline 2 where the first throttling element 12 and the second throttling element 22 are respectively provided. A compressor 8 and a switching component 4. The switching component 4 has at least two working positions. When the switching component 4 is in the first working position, the switching component 4 makes the outlet of the compressor 8 communicate with one end of the first pipeline 1 and the second pipeline 2 where the first heat exchanger 11 and the second heat exchanger 21 are respectively provided, and the inlet of the compressor 8 communicate with the other end of the third heat exchanger 7. When the switching component 4 is in the second working position, the switching component 4 makes the outlet of the compressor 8 communicate with the other end of the third heat exchanger 7, and the inlet of the compressor 8 communicate with one end of the first pipeline 1 and the second pipeline 2 where the first heat exchanger 11 and the second heat exchanger 21 are respectively provided.

[0047] Among them, the third heat exchanger 7 is a heat exchanger for heat exchange between the refrigerant and outdoor air. The second heat exchanger 21 is a heat exchanger for heat exchange between the refrigerant and air. This air is the air input from the return air duct and / or the fresh air duct to the energy supply device. After the temperature and / or humidity of this air is adjusted by the second heat exchanger 21, it is conveyed to the rooms in the user's indoor area that require it through the supply air duct. The first heat exchanger 11 is a heat exchanger for heat exchange between the refrigerant and the heat exchange medium. When the heat exchange medium flows through the second heat exchange flow path 112 of the first heat exchanger 11, it exchanges heat with the refrigerant flowing through the first heat exchange flow path 111, thereby achieving temperature adjustment. The heat exchange medium after temperature adjustment is then conveyed to the terminal device through a pipeline, so that the terminal device can supply cooling or heating to the rooms in the user's indoor area that require it.

[0048] As Figure 1 shown, when the energy supply device is in the heating operation state, frosting or icing may occur on the outer surface of the third heat exchanger 7, resulting in too low a temperature of the third heat exchanger 7, and the refrigerant flowing through the third heat exchanger 7 cannot efficiently exchange heat with outdoor air. At this time, as Figure 2 shown, the energy supply system and the energy supply device need to enter the defrosting mode. The defrosting mode has a first state and a second state. The control unit controls the energy supply device to be in the first state or the second state based on the temperature of the heat exchange medium flowing through the second heat exchange flow path 112 detected by the first temperature detection component 3. When the temperature of the heat exchange medium flowing through the second heat exchange flow path 112 detected by the first temperature detection component 3 is relatively high, the energy supply device is in the first state. At this time, the refrigerant flowing through the first heat exchange flow path 111 of the first heat exchanger 11 absorbs heat from the heat exchange medium flowing through the second heat exchange flow path 112, and the temperature of the heat exchange medium flowing through the second heat exchange flow path 112 drops. Coupled with the heat generated by the work of the compressor 8, the third heat exchanger 7 is defrosted. As the defrosting progresses, when the temperature of the heat exchange medium flowing through the second heat exchange flow path 112 detected by the first temperature detection component 3 is relatively low, the energy supply device is in the second state. At this time, the refrigerant flowing through the second heat exchanger 21 absorbs heat from the air flowing through the second heat exchanger 21. Although the temperature of the air flowing through the second heat exchanger 21 drops, it will not freeze like the heat exchange medium flowing through the second heat exchange flow path 112 may. Coupled with the heat generated by the work of the compressor 8, the third heat exchanger 7 continues to be defrosted. Through the above process, it is possible to effectively avoid freezing of the heat exchange medium in the second heat exchange flow path 112 due to too low a temperature in the first state without installing a water tank. At the same time, it is also possible to make the defrosting operation continue for a long time, thereby ensuring the defrosting effect on the third heat exchanger 7 and preventing the energy supply system and the energy supply device from frequently switching to the defrosting mode. Of course, it should be noted that, as feasible, the energy supply device and the energy supply system in the present application may also be equipped with a water tank.

[0049] Among them, the temperature of the heat exchange medium flowing through the second heat exchange flow path 112 detected by the first temperature detection component 3 in the second state is lower than the first preset temperature.

[0050] Among them, the first preset temperature can be determined according to the actual situation. Generally speaking, the first preset temperature can be set slightly higher than the freezing temperature of the heat exchange medium, so that the time for the energy supply system and the energy supply device to be in the first state in the defrosting mode can be increased as much as possible, thereby increasing the heat absorption amount of the refrigerant from the heat exchange medium and ensuring the heat absorption rate of the refrigerant from the heat exchange medium, which is more conducive to defrosting the third heat exchanger 7.

[0051] Furthermore, as a feasible solution, the temperature of the heat exchange medium flowing through the second heat exchange flow path 112 detected by the first temperature detection component 3 in the first state is higher than the first preset temperature.

[0052] Through the above method, the time for the energy supply system and the energy supply device to be in the first state in the defrosting mode can be increased as much as possible while ensuring that the temperature of the heat exchange medium in the second heat exchange flow path 112 does not freeze.

[0053] The energy supply device may include: a driving pump 5, the driving pump 5 is communicated with the second heat exchange flow path 112, and the driving pump 5 is electrically connected to the control unit. The driving pump 5 can drive the heat exchange medium to flow through the second heat exchange flow path 112 and deliver it to the terminal device. The heat exchange medium flowing through the terminal device can then flow back into the second heat exchange flow path 112 of the energy supply device, and circulate continuously in this way. In the first state, the driving pump 5 can be in an operating state, so that the heat exchange medium in the pipeline can continuously flow through the second heat exchange flow path 112 to exchange heat with the refrigerant flowing through the first heat exchange flow path 111, so as to make full use of all the heat exchange medium in the pipeline, delay the temperature drop rate of the heat exchange medium flowing through the second heat exchange flow path 112, and enable the defrosting operation to continue for a long time, thereby ensuring the defrosting effect on the third heat exchanger 7.

[0054] Among them, in the first state, the second throttling element 22 can be in an open state or a closed state. When the second throttling element 22 is in an open state, in the defrosting mode, the heat absorption amount of the refrigerant from the first heat exchanger 11 and the second heat exchanger 21 can reach the maximum, which is beneficial to improving the defrosting effect on the third heat exchanger 7.

[0055] As a feasible solution, the energy supply device may include: a first blower 6 electrically connected to the control unit, and the first blower 6 is used to drive air to flow through the second heat exchanger 21. The first blower 6 can suck air from the return air duct and / or the fresh air duct into the energy supply device, adjust the temperature and / or humidity through the second heat exchanger 21 and then send it out, and then deliver it to the rooms required by the user indoors through the air supply duct.

[0056] In the first state, when the second throttling element 22 is in the open state, the first blower 6 is in the closed state or the operating state. When the first blower 6 is in the closed state, since the room required by the user indoors needs to be heated, it is possible to avoid delivering cold air to the room required by the user indoors through the air supply passage, thereby affecting the user experience. Further, when the second throttling element 22 is in the open state and the first blower 6 is in the operating state, the first blower 6 operates at a low speed. In this way, the amount of cold air delivered to the room required by the user indoors through the air supply passage can be greatly reduced, making it basically imperceptible to the user and hardly affecting the user experience. At the same time, it can ensure to a certain extent that there is a continuous supply of air for heat exchange with the refrigerant flowing through the second heat exchanger 21, ensuring the smooth completion of the defrosting of the system and preventing the second heat exchanger 21 from frosting.

[0057] In the first state, when the second throttling element 22 is in the closed state, the first blower 6 can be in the closed state. In the second state, similarly, the first blower 6 can be in the operating state or the closed state. Similarly, further, when the first blower 6 is in the operating state, the first blower 6 can operate at a low speed.

[0058] As an alternative, the first throttling element 12 and the second throttling element 22 can be electronic expansion valves, or other throttling elements that can be controlled to open or close. Alternatively, the first throttling element 12 and the second throttling element 22 can be combined with a throttling element that cannot be controlled to open or close and a valve that can be controlled to open or close, thereby equivalent to using a throttling element that can be controlled to open or close.

[0059] As an alternative, the energy supply system can include: the inlet of the compressor 8 is also connected to a gas-liquid separator 9, and the refrigerant flowing back from the self-switching assembly 4 is delivered to the compressor 8 after passing through the gas-liquid separator 9.

[0060] As feasible, the energy supply system may include: an outdoor unit. The outdoor unit may include a compressor 8 and a third heat exchanger 7. The outdoor unit is used to be installed outdoors so that the third heat exchanger 7 can exchange heat with the outdoor air. The energy supply system may include: an indoor unit. The indoor unit may include: a first heat exchanger 11, a second heat exchanger 21, a first temperature detection component 3, and a control unit. The first throttling element 12 and the second throttling element 22 may be located in the outdoor unit or in the indoor unit. When the first throttling element 12 and the second throttling element 22 are in the indoor unit, the first pipeline 1 and the second pipeline 2 in the indoor unit may be connected in parallel or may be two independent pipelines, and both ends of the first pipeline 1 and the second pipeline 2 may be connected together outside the indoor unit respectively. When the first throttling element 12 and the second throttling element 22 are in the outdoor unit, one ends of the first pipeline 1 and the second pipeline 2 in the indoor unit are respectively connected to the first throttling element 12 and the second throttling element 22 in the outdoor unit through pipelines, and the other ends of the first pipeline 1 and the second pipeline 2 in the indoor unit may be connected together and then connected to the switching component 4 in the outdoor unit through a pipeline, or may be respectively connected to the switching component 4 in the outdoor unit through pipelines. The energy supply device may include an indoor unit, or may include components in the indoor unit and at least part of the outdoor unit, and no limitation is made thereto in this application. In other feasible embodiments, there is no distinction between the indoor unit and the outdoor unit for the energy supply device, and all components in the indoor unit and the outdoor unit may be integrated in a housing. The energy supply device may directly exchange heat with the outside air to achieve the function of the third heat exchanger 7, and the air after temperature and / or humidity adjustment through the second heat exchanger 21 is then delivered to the rooms required by the user indoors through the air supply channel, and the heat exchange medium passing through the first heat exchanger 11 is delivered to the terminal device through a pipeline.

[0061] When the energy supply device is in the heating operation state, frosting or icing may occur on the outer surface of the third heat exchanger 7. In order to enable the energy supply system and the energy supply device to enter the defrosting mode in a timely manner, as feasible, the energy supply system may include: a second temperature detection component, and the second temperature detection component is used to detect the temperature of the third heat exchanger 7. The control unit may be electrically connected to the second temperature detection component and the switching component 4.

[0062] Further, the control unit can be used to switch the switching component 4 from the first working position to the second working position and enter the defrosting mode when the temperature of the third heat exchanger 7 detected by the second temperature detection component is lower than the second preset temperature. The control unit can also be used to switch the switching component 4 from the second working position to the first working position when the temperature of the outer surface of the third heat exchanger 7 detected by the second temperature detection component is higher than the third preset temperature, and the third preset temperature is higher than the second preset temperature, so as to exit the defrosting mode and enter the heating mode. The second preset temperature can be set according to specific circumstances. Of course, whether the energy supply device and the energy supply system enter the defrosting mode can also be judged in combination with other conditions, not only based on the second preset temperature. For example, the temperature of the refrigerant after flowing through the third heat exchanger 7, etc.

[0063] The energy supply system can include: terminal devices. The terminal devices can be various devices that can cool or heat the indoor environment through a heat exchange medium. For example, the terminal devices can include, but are not limited to: fan coils, floor heating, etc.

[0064] Furthermore, the terminal device can include a fourth heat exchanger and a second fan. The fourth heat exchanger can communicate with the second heat exchange flow path 112, and the second fan is used to drive air to flow through the fourth heat exchanger, so as to realize the heating or cooling of the indoor environment. The energy supply system can include: a third temperature detection component, which is used to detect the temperature of the heat exchange medium flowing through the fourth heat exchanger. The control unit is used to control the second fan based on the temperature of the heat exchange medium flowing through the fourth heat exchanger detected by the third temperature detection component.

[0065] As a feasible solution, when the temperature of the heat exchange medium flowing through the fourth heat exchanger detected by the third temperature detection component exceeds the fourth preset temperature in the defrosting mode of the energy supply device, the second fan is in the operating state. In this way, in the defrosting mode, when the temperature of the heat exchange medium flowing through the fourth heat exchanger is relatively high, the terminal device can continue to use this part of the heat to heat the indoor environment. When the temperature of the heat exchange medium flowing through the fourth heat exchanger detected by the third temperature detection component is lower than the fourth preset temperature in the defrosting mode of the energy supply device, the second fan is in the closed state. In this way, in the defrosting mode, it can be avoided that the terminal device outputs cold air to the indoor environment, thus affecting the user experience.

[0066] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for various purposes. The term "consisting essentially of" describing a combination shall include the identified elements, ingredients, components or steps and other elements, ingredients, components or steps that do not materially affect the basic novel features of the combination. The use of the terms "comprising" or "including" to describe the combinations of elements, ingredients, components or steps herein also contemplates embodiments consisting essentially of these elements, ingredients, components or steps. By using the term "may" herein, it is intended that any of the attributes described as "may" include are optional. A plurality of elements, ingredients, components or steps can be provided by a single integrated element, ingredient, component or step. Alternatively, a single integrated element, ingredient, component or step can be separated into discrete multiple elements, ingredients, components or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step does not preclude the presence of other elements, ingredients, components or steps.

[0067] Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention shall be covered within the protection scope of the present invention.

Claims

1. An energy supply device, characterized in that, The energy supply device includes: A first pipeline and a second pipeline. The first pipeline is provided with a first heat exchanger and a first throttling element, and the second pipeline is provided with a second heat exchanger and a second throttling element. The first heat exchanger has a first heat exchange flow channel and a second heat exchange flow channel. The first heat exchange flow channel is connected to the first pipeline, and the second heat exchange flow channel is used to be connected to the terminal device. The refrigerant flowing through the first heat exchange flow channel and the heat exchange medium flowing through the second heat exchange flow channel can perform heat exchange. A first temperature detection component, which is used to detect the temperature of the heat exchange medium flowing through the second heat exchange flow channel. A control unit, which is electrically connected to the first temperature detection component, the first throttling element, and the second throttling element. The energy supply device has a defrosting mode, and the defrosting mode has a first state and a second state. In the first state, the first throttling element is in an open state, and the second throttling element is in an open state or a closed state. In the second state, the first throttling element is in a closed state, and the second throttling element is in an open state. The control unit is used to control the energy supply device to be in the first state or the second state based on the temperature of the heat exchange medium flowing through the second heat exchange flow channel detected by the first temperature detection component when the energy supply device is in the defrosting mode.

2. The energy supply device according to claim 1, characterized in that, In the second state, the temperature of the heat exchange medium flowing through the second heat exchange flow channel detected by the first temperature detection component is lower than a first preset temperature.

3. The energy supply device according to claim 1, wherein In the first state, the temperature of the heat exchange medium flowing through the second heat exchange flow channel detected by the first temperature detection component is higher than a first preset temperature.

4. The energy supply device according to claim 1, characterized in that, The second heat exchanger is a heat exchanger for heat exchange between refrigerant and air.

5. The energy supply device according to claim 1, characterized in that The energy supply device includes: A driving pump, which is communicated with the second heat exchange flow channel and is electrically connected to the control unit. In the first state, the driving pump is in an operating state.

6. The energy supply device according to claim 4, characterized in that, The energy supply device includes: A first fan electrically connected to the control unit, which is used to drive air to flow through the second heat exchanger. In the first state, when the second throttling element is in an open state, the first fan is in a closed state or an operating state. When the second throttling element is in a closed state, the first fan is in a closed state. In the second state, the first fan is in an operating state or a closed state.

7. The energy supply device according to claim 6, characterized in that, In the first state and the second state, when the first fan is in an operating state, the first fan operates at a low speed.

8. The energy supply device according to claim 1, characterized in that The first throttling element and the second throttling element are electronic expansion valves.

9. An energy supply system, characterized in that, The energy supply system includes the energy supply device as described in claim 1; A third heat exchanger, one end of which is communicated with one ends of the first pipeline and the second pipeline respectively where the first throttling element and the second throttling element are located; A compressor and a switching component, the switching component having at least two working positions. When the switching component is in the first working position, the switching component enables the outlet of the compressor to communicate with one end of a first heat exchanger and a second heat exchanger in a first pipeline and a second pipeline respectively, and the inlet of the compressor to communicate with the other end of a third heat exchanger; when the switching component is in the second working position, the switching component enables the outlet of the compressor to communicate with the other end of the third heat exchanger, and the inlet of the compressor to communicate with one end of the first heat exchanger and the second heat exchanger in the first pipeline and the second pipeline respectively.

10. The energy supply system according to claim 9, characterized in that, The third heat exchanger is a heat exchanger for heat exchange between a refrigerant and outdoor air.

11. The energy supply system according to claim 9, characterized in that, The energy supply system includes: an outdoor unit, and the outdoor unit includes the compressor and the third heat exchanger.

12. The energy supply system according to claim 9, characterized in that, The energy supply system includes: A second temperature detection component for detecting the temperature of the third heat exchanger.

13. The energy supply system according to claim 12, characterized in that, The control unit is electrically connected to the second temperature detection component and the switching component; The control unit is configured to switch the switching component from the first working position to the second working position and enter the defrosting mode when the temperature of the third heat exchanger detected by the second temperature detection component is lower than a second preset temperature.

14. The energy supply system according to claim 13, characterized in that, The control unit is configured to switch the switching component from the second working position to the first working position when the temperature of the outer surface of the third heat exchanger detected by the second temperature detection component is higher than a third preset temperature, and the third preset temperature is higher than the second preset temperature.

15. The energy supply system according to claim 9, characterized in that, The energy supply system includes: A terminal device, the terminal device including a fourth heat exchanger and a second blower, the fourth heat exchanger being capable of communicating with a second heat exchange flow path, and the second blower being used for driving air to flow through the fourth heat exchanger.

16. The energy supply system according to claim 15, characterized in that, The energy supply system includes: a third temperature detection component for detecting the temperature of a heat exchange medium flowing through the fourth heat exchanger; The control unit is configured to control the second blower based on the temperature of the heat exchange medium flowing through the fourth heat exchanger detected by the third temperature detection component.

17. The energy supply system according to claim 16, wherein When the energy supply device is in the defrosting mode and the temperature of the heat exchange medium flowing through the fourth heat exchanger detected by the third temperature detection component exceeds a fourth preset temperature, the second blower is in an operating state; When the energy supply device is in the defrosting mode and the temperature of the heat exchange medium flowing through the fourth heat exchanger detected by the third temperature detection component is lower than the fourth preset temperature, the second blower is in a closed state.

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