Heat exchange system and air conditioner heat pump system

Abstract

The utility model discloses a heat exchange system and an air conditioner heat pump system.The heat exchange system comprises a refrigerant circulation system and a water circulation system, the refrigerant circulation system comprises a compressor, a throttling element, a first refrigerant heat exchanger and a second refrigerant heat exchanger, and the first refrigerant heat exchanger and the second refrigerant heat exchanger are both plate heat exchangers; water heat exchange pipelines of the first refrigerant heat exchanger and the second refrigerant heat exchanger correspondingly communicate with the water circulation systems, and at least one water circulation system is provided with a water heat exchanger. Compared with a finned heat exchanger, the first refrigerant heat exchanger and the second refrigerant heat exchanger are small in overall size, compact in structure and higher in heat exchange efficiency, so that the refrigerating or heating effect of the heat exchange system is more stable. And heat exchange with air is not needed, so that the first refrigerant heat exchanger and the second refrigerant heat exchanger do not need to be provided with cooling fans, noise is low, the frosting risk of a fin type heat exchanger is avoided, and the use comfort of a user is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, and more particularly to a heat exchange system and an air conditioner heat pump system. BACKGROUND

[0002] Traditional air conditioner systems rely on the evaporation and condensation processes of refrigerant to transfer heat, achieve refrigeration and heating functions, which requires the refrigerant circulation pipeline to extend to the user end. However, this design results in low integration of the whole machine, large refrigerant charge and potential safety hazards.

[0003] There is also a fluorine non-in-home air conditioner in the prior art, which centrally sets the evaporator and condenser of the refrigerant circulation on the outdoor unit side, and the refrigerant circulation pipeline does not need to extend to the user end. The heat exchanger at the user end exchanges heat with the refrigerant through circulating water to transfer cold or heat to the user end. This design significantly improves the integration and operating safety of the air conditioner system. Meanwhile, the specific heat capacity of the circulating water is higher, and the user experience is more comfortable during operation.

[0004] One of the heat exchangers of the current fluorine non-in-home air conditioner is a finned tube heat exchanger (refrigerant-air heat exchanger), and the other is a plate heat exchanger (refrigerant-water heat exchanger). The finned tube heat exchanger is large in size, and the system has low heat exchange efficiency, high noise and is prone to frosting during operation.

[0005] Therefore, how to reduce the system size, improve the heat exchange efficiency and reduce the noise is a problem to be solved by those skilled in the art. CONTENT OF THE INVENTION

[0006] Therefore, the purpose of the present application is to provide a heat exchange system to reduce the system size, improve the heat exchange efficiency and reduce the noise.

[0007] Another purpose of the present application is to provide an air conditioner heat pump system with the above heat exchange system.

[0008] To achieve the above purpose, the present application provides the following technical solution:

[0009] The first aspect of the present application provides a heat exchange system, comprising:

[0010] A refrigerant circulation system, the refrigerant circulation system comprising a compressor, a throttling device, a first refrigerant heat exchanger and a second refrigerant heat exchanger, the refrigerant heat exchange pipeline of the first refrigerant heat exchanger and the refrigerant heat exchange pipeline of the second refrigerant heat exchanger being in communication with each other to obtain a refrigerant circulation loop, the throttling device being arranged on the refrigerant circulation loop and located between the first refrigerant heat exchanger and the second refrigerant heat exchanger, the compressor being used to drive the refrigerant to circulate in the refrigerant circulation loop, and the first refrigerant heat exchanger and the second refrigerant heat exchanger both being plate heat exchangers.

[0011] The water circulation system is connected to the first refrigerant heat exchanger and the second refrigerant heat exchanger, and at least one of the water circulation systems is provided with a water heat exchanger.

[0012] In a possible implementation, the water circulation system connected to the first refrigerant heat exchanger is a first water circulation system, and the water circulation system connected to the second refrigerant heat exchanger is a second water circulation system.

[0013] The first water circulation system and the second water circulation system are both provided with the water heat exchanger, or the first water circulation system is provided with the water heat exchanger, and the second water circulation system is used to be connected to an external water source.

[0014] In a possible implementation, the water heat exchanger on the first water circulation system at least includes a first application end heat exchanger and a second application end heat exchanger, and the first application end heat exchanger and the second application end heat exchanger have different functions.

[0015] In a possible implementation, the first application end heat exchanger is used to exchange heat with a user end device.

[0016] And / or,

[0017] The second application end heat exchanger is used to exchange heat with an indoor environment.

[0018] In a possible implementation, the first application end heat exchanger is a plate heat exchanger, and the user end device is a water heater.

[0019] The second application end heat exchanger includes one or more of a fan coil, a floor heating heat exchanger, and a water heater.

[0020] In a possible implementation, the first application end heat exchanger and the second application end heat exchanger are connected in parallel on a loop of the first water circulation system.

[0021] And / or,

[0022] The first application end heat exchanger is multiple, and each first application end heat exchanger is connected in parallel on the loop of the first water circulation system.

[0023] And / or,

[0024] The second application end heat exchanger is multiple, and each second application end heat exchanger is connected in parallel on the loop of the first water circulation system.

[0025] In a possible implementation, the water inlet sides of the first application end heat exchanger and the second application end heat exchanger are connected in parallel through a first three-way valve.

[0026] The outlet water sides of the first application-side heat exchanger and the second application-side heat exchanger are connected in parallel through a second three-way valve.

[0027] In a possible implementation, the first three-way valve comprises a first port, a second port and a third port, the first port is in communication with the first refrigerant heat exchanger, the second port is in communication with the first application-side heat exchanger, and the third port is in communication with the second application-side heat exchanger.

[0028] When the first three-way valve is in a first working mode, the first port is in communication with the second port and is cut off from the third port.

[0029] When the first three-way valve is in a second working mode, the first port is in communication with the third port and is cut off from the second port.

[0030] When the first three-way valve is in a third working mode, the first port is in communication with both the second port and the third port.

[0031] In a possible implementation, a circulating water pump and an expansion tank are connected in series on the loop of the first water circulation system.

[0032] The expansion tank is arranged upstream of the first application-side heat exchanger and the second application-side heat exchanger.

[0033] And / or,

[0034] The circulating water pump is arranged downstream of the first application-side heat exchanger and the second application-side heat exchanger.

[0035] In a possible implementation, an exhaust valve and an electric heating device are connected in series on the loop of the first water circulation system.

[0036] The exhaust valve and the electric heating device are both arranged upstream of the first application-side heat exchanger and the second application-side heat exchanger.

[0037] The heat exchange system provided in the application comprises a refrigerant circulation system and a water circulation system. The refrigerant in the refrigerant circulation system circulates in the refrigerant circulation loop under the action of the compressor. According to the flow direction of the refrigerant in the refrigerant circulation loop, one of the first refrigerant heat exchanger and the second refrigerant heat exchanger becomes an evaporator, and the other becomes a condenser. The first refrigerant heat exchanger and the second refrigerant heat exchanger are both plate heat exchangers, so that the first refrigerant heat exchanger and the second refrigerant heat exchanger can be connected to the water circulation system to exchange heat with the first refrigerant heat exchanger and the second refrigerant heat exchanger through the circulating water in the water circulation system. Compared with air medium heat exchange, the whole machine has a small volume, a compact structure, and a higher heat exchange efficiency, so that the refrigeration or heating effect of the heat exchange system is more stable. Moreover, since air heat exchange is not required, the first refrigerant heat exchanger and the second refrigerant heat exchanger do not need to be provided with a heat dissipation fan, so that the noise is small, and there is no risk of frosting of the fin heat exchanger, improving the user comfort.

[0038] The second aspect of the application provides an air conditioner heat pump system comprising the heat exchange system according to any one of the above.

[0039] The air conditioner heat pump system provided in the application has all the technical effects of the heat exchange system described above, and details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0041] Figure 1 The system diagram of the air conditioner heat pump system disclosed in the embodiments of the application.

[0042] The meanings of various reference signs in the drawings are as follows:

[0043] 101-compressor; 102-four-way valve; 103-first refrigerant heat exchanger; 104-liquid storage tank; 105-throttling device; 106-second refrigerant heat exchanger;

[0044] 201-electric heating device; 202-expansion tank; 203-first application end heat exchanger; 204-user end equipment; 205-water pump; 206-second application end heat exchanger; 207-circulating water pump;

[0045] 301 - exhaust valve; 302 - first three-way valve; 303 - water supplement valve; 304 - water mixing valve; 305 - second three-way valve. DETAILED DESCRIPTION

[0046] The present application discloses a heat exchange system to reduce system volume, improve heat exchange efficiency and reduce noise;

[0047] The present application also discloses an air conditioning heat pump system with the above heat exchange system.

[0048] Hereinafter, embodiments will be described with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the application content recited in the claims in any way. Furthermore, the entire content of the configuration represented in the following embodiments is not limited to what is necessary as a solution to the application recited in the claims. Note that, for the sake of convenience of description, only the parts relevant to the application are shown in the drawings. The embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0049] As shown in Figure 1 The heat exchange system disclosed in the embodiments of the present application includes a refrigerant circulation system and a water circulation system. The refrigerant circulation system is a circuit with refrigerant as the heat exchange medium. Those skilled in the art can understand that the refrigerant circulation system generally includes a compressor 101, a throttling device 105, a first refrigerant heat exchanger 103 and a second refrigerant heat exchanger 106.

[0050] The refrigerant heat exchange pipeline of the first refrigerant heat exchanger 103 and the refrigerant heat exchange pipeline of the second refrigerant heat exchanger 106 are connected to each other to obtain a refrigerant circulation circuit. The throttling device 105 is arranged on the refrigerant circulation circuit and located between the first refrigerant heat exchanger 103 and the second refrigerant heat exchanger 106. The compressor 101 is used to drive the refrigerant to circulate in the refrigerant circulation circuit, i.e. the compressor 101 is responsible for compressing the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant, and driving the refrigerant to circulate in the refrigerant circulation circuit.

[0051] One of the first refrigerant heat exchanger 103 and the second refrigerant heat exchanger 106 is a condenser, and the other is an evaporator. The condenser is used to cool the high-temperature and high-pressure refrigerant discharged by the compressor 101, so that it condenses into high-pressure liquid refrigerant. The condenser releases heat by exchanging heat with the outside. The evaporator is a key component for the refrigerant to absorb surrounding heat and convert it into cold. In the evaporator, the liquid refrigerant evaporates rapidly, absorbs surrounding heat, thereby reducing the temperature and achieving the refrigeration effect. The throttling device 105 serves as a dividing point between high pressure and low pressure, throttles and depressurizes the high-pressure liquid refrigerant, and adjusts the amount of liquid refrigerant entering the evaporator to adapt to changes in refrigeration load. At the same time, it can also prevent the occurrence of liquid knock phenomenon of the compressor, and ensure the safe operation of the system.

[0052] Those skilled in the art can understand that the throttling member 105 can be an electronic expansion valve or a capillary tube, and the specific type of the throttling member 105 is not limited in the embodiment.

[0053] In the embodiment, the first refrigerant heat exchanger 103 and the second refrigerant heat exchanger 106 are both plate heat exchangers, i.e., the first refrigerant heat exchanger 103 and the second refrigerant heat exchanger 106 are both refrigerant-water heat exchangers, i.e., the two heat exchange mediums circulating in the first refrigerant heat exchanger 103 and the second refrigerant heat exchanger 106 are refrigerant and water.

[0054] The first refrigerant heat exchanger 103 and the second refrigerant heat exchanger 106 have water heat exchange pipelines in addition to refrigerant heat exchange pipelines, the heat exchange medium circulating in the refrigerant heat exchange pipelines is refrigerant, and the heat exchange medium circulating in the water heat exchange pipelines is water, and the water and the refrigerant complete heat exchange in the first refrigerant heat exchanger 103 and the second refrigerant heat exchanger 106.

[0055] The water heat exchange pipelines of the first refrigerant heat exchanger 103 and the second refrigerant heat exchanger 106 are both connected to water circulation systems, and the water circulation systems drive circulating water to flow in the water heat exchange pipelines of the first refrigerant heat exchanger 103 and the second refrigerant heat exchanger 106.

[0056] The at least one water circulation system is provided with a water heat exchanger, which can be arranged at an application end for application. For example, the water heat exchanger can be arranged indoors to complete indoor heating / cooling work. According to requirements, the water heat exchanger can also be arranged at other places to realize corresponding heating / cooling work of the places.

[0057] For ease of understanding, in the embodiment, the water circulation system connected to the first refrigerant heat exchanger 103 is defined as a first water circulation system, and the water circulation system connected to the second refrigerant heat exchanger 106 is defined as a second water circulation system.

[0058] The first water circulation system and the second water circulation system can both be provided with water heat exchangers. Since one of the first refrigerant heat exchanger 103 and the second refrigerant heat exchanger 106 is a condenser, and the other is an evaporator, one of the first refrigerant heat exchanger 103 and the second refrigerant heat exchanger 106 is in a heating state, and the other is in a cooling state.

[0059] When the water heat exchanger is arranged on the first water circulation system and the second water circulation system, the water heat exchanger on one of the first water circulation system and the second water circulation system is the refrigeration heat exchanger, and the water heat exchanger on the other is the heating heat exchanger. In this way, the cold and heat generated by the heat exchange system can be used at the same time. In an application scenario, when heating is needed in the user room, the water heat exchanger capable of heating can be arranged in the room to realize the heating in the room, and the water heat exchanger capable of generating cold can be arranged in the cold storage of the user to maintain the low-temperature environment of the cold storage, so that the food in the cold storage is in a low-temperature environment, and the storage time of the food is improved.

[0060] It should be noted that in another embodiment, the water heat exchanger can also be arranged only on one of the first water circulation system and the second water circulation system. For example, the first water circulation system is provided with the water heat exchanger, and the second water circulation system is used to be connected with the external water source, that is, the second water circulation system is not provided with the water heat exchanger, that is, the cold / heat of the second water circulation system is not utilized. The water in the external water source is pumped into the water heat exchange pipeline of the second refrigerant heat exchanger 106 by the circulating pump, exchanges heat with the refrigerant in the second refrigerant heat exchanger 106, and then is directly discharged or returned to the external water source.

[0061] The external water source includes but is not limited to city water, purified seawater, underground water, and circulating water after heat exchange with seawater, that is, the cleanliness of the external water source needs to be ensured as much as possible to improve the operation stability of the second refrigerant heat exchanger 106; of course, the heat exchanger with strong anti-pollution property can also be externally connected, and the circulating water exchanges heat in the heat exchanger with strong anti-pollution property and then exchanges heat with the second refrigerant heat exchanger 106.

[0062] The heat exchange system disclosed in the embodiment of the application includes a refrigerant circulation system and a water circulation system. The refrigerant in the refrigerant circulation system circulates in the refrigerant circulation loop under the action of the compressor 101. According to the flow direction of the refrigerant in the refrigerant circulation loop, one of the first refrigerant heat exchanger 103 and the second refrigerant heat exchanger 106 becomes an evaporator, and the other becomes a condenser.

[0063] In this embodiment, the first refrigerant heat exchanger 103 and the second refrigerant heat exchanger 106 are both plate heat exchangers, so that the first refrigerant heat exchanger 103 and the second refrigerant heat exchanger 106 can be connected to the water circulation system to exchange heat with the first refrigerant heat exchanger 103 and the second refrigerant heat exchanger 106 through the water circulation system. That is, the first refrigerant heat exchanger 103 and the second refrigerant heat exchanger 106 exchange heat through circulating water in the water circulation system. Compared with the fin heat exchanger, the whole machine has small volume, compact structure, and higher heat exchange efficiency, so that the refrigeration or heating effect of the heat exchange system is more stable. Moreover, since heat exchange with air is not required, the first refrigerant heat exchanger 103 and the second refrigerant heat exchanger 106 do not need to be provided with a heat dissipation fan, so the noise is smaller, and there is also no risk of frost formation of the fin heat exchanger, improving the user's comfort.

[0064] It should be noted that if the refrigerant circulation system has a refrigeration and heating switching function, the refrigerant circulation system can include a four-way valve 102. The four-way valve 102 has four valve ports, which are defined as a first valve port, a second valve port, a third valve port, and a fourth valve port. The first valve port of the four-way valve 102 is in communication with the exhaust port of the compressor 101, the second valve port is in communication with the first refrigerant port of the first refrigerant heat exchanger 103, the third valve port is in communication with the first refrigerant port of the second refrigerant heat exchanger 106, and the fourth valve port is in communication with the suction port of the compressor 101.

[0065] For example, only a water heat exchanger is provided on the first water circulation system. When the refrigerant circulation system is in a heating mode, the first valve port and the second valve port of the four-way valve 102 are in communication, and the third valve port and the fourth valve port are in communication. That is, the exhaust port of the compressor 101 is in communication with the first refrigerant port of the first refrigerant heat exchanger 103 (the first refrigerant heat exchanger 103 is a condenser), and the second refrigerant port of the first refrigerant heat exchanger 103 is in communication with the first side of the throttling element 105. The first refrigerant port of the second refrigerant heat exchanger 106 is in communication with the suction port of the compressor 101, and the second refrigerant port of the second refrigerant heat exchanger 106 is in communication with the second side of the throttling element 105.

[0066] When the refrigerant circulation system is in a refrigeration mode, the first valve port and the third valve port of the four-way valve 102 are in communication, and the second valve port and the fourth valve port are in communication. The exhaust port of the compressor 101 is in communication with the first refrigerant port of the second refrigerant heat exchanger 106, the second refrigerant port of the second refrigerant heat exchanger 106 is in communication with the second side of the throttling element 105, the suction port of the compressor 101 is in communication with the first refrigerant port of the first refrigerant heat exchanger 103 (the first refrigerant heat exchanger 103 is an evaporator), and the second refrigerant port of the first refrigerant heat exchanger 103 is in communication with the first side of the throttling element 105.

[0067] It should be noted that the refrigerant circulation system can further include a liquid storage tank 104. The liquid storage tank 104 can store excess liquid refrigerant when the load of the refrigerant circulation system changes, so as to avoid excessive refrigerant from entering the evaporator and affecting the system efficiency. The liquid storage tank 104 can also adjust the refrigerant flow according to the demand of the refrigerant circulation system, so as to ensure stable operation, prevent flow fluctuation, and improve system stability.

[0068] In addition, the liquid storage tank 104 can separate gaseous refrigerant and liquid refrigerant before the refrigerant enters the throttling device 105, so as to ensure that only liquid refrigerant enters the throttling device 105 and improve efficiency. The liquid storage tank 104 stores liquid refrigerant, which can prevent the liquid refrigerant from entering the compressor 101 and avoid liquid damage to the compressor. When the load changes, the liquid storage tank 104 can provide a buffer to store or release refrigerant, enhance the adaptability of the system, and maintain stable operation.

[0069] In an embodiment of the present application, the water heat exchanger on the first water circulation system includes at least a first application end heat exchanger 203 and a second application end heat exchanger 206, and the first application end heat exchanger 203 and the second application end heat exchanger 206 have different functions. In this embodiment, at least two heat exchangers with different functions can be provided on the first water circulation system. Those skilled in the art can select the corresponding application end heat exchanger according to different application scenarios.

[0070] For example, the first application end heat exchanger 203 can be used for heat exchange with the user end device 204, that is, the first application end heat exchanger 203 can heat the user end device 204 by heat exchange with the user end device 204.

[0071] The second application end heat exchanger 206 can be used for heat exchange with the indoor environment, that is, it can directly cool or heat indoor air.

[0072] As can be seen from the above description, the first application end heat exchanger 203 can be a plate heat exchanger, and the second application end heat exchanger 206 can be a fin heat exchanger, or other forms of heat exchangers. Specifically, the user end device 204 can be a water heater.

[0073] The water heater is an essential device in a family. In this embodiment, the heat generated by the first application end heat exchanger 203 can be used for heat exchange with water in the water heater, so as to heat the water in the water heater and facilitate user use.

[0074] It should be noted that the first application end heat exchanger 203 is not limited to one, and multiple first application end heat exchangers 203 can be set according to requirements. The user end devices 204 that exchange heat with each of the first application end heat exchangers 203 can also be different devices, such as a water heater that exchanges heat with one of the first application end heat exchangers 203, and an incubator, a heat preservation box, etc. that exchange heat with other first application end heat exchangers 203. Of course, the user end devices 204 that exchange heat with each of the first application end heat exchangers 203 can also be the same device, for example, all water heaters, and each water heater is arranged at a different location to provide hot water for users at different locations.

[0075] The second application end heat exchanger 206 can be one or more of a terminal radiator, such as a fan coil, a floor heating heat exchanger, and a water heater. Those skilled in the art can understand that the floor heating heat exchanger and the water heater are two different heater products, the floor heating heat exchanger is arranged under the floor, and the water heater is usually hung on the side wall.

[0076] Further, the first application end heat exchanger 203 and the second application end heat exchanger 206 can be connected in parallel on the loop of the first water circulation system. The first application end heat exchanger 203 and the second application end heat exchanger 206 are arranged in parallel, so that the first application end heat exchanger 203 and the second application end heat exchanger 206 can obtain the same refrigeration or heating effect, and avoid the problem of heat / cold attenuation of the heat exchanger located downstream due to series connection.

[0077] The first application end heat exchanger 203 can be set multiple according to requirements. When the first application end heat exchanger 203 is set multiple, each of the first application end heat exchangers 203 can also be connected in parallel on the loop of the first water circulation system. The effect brought by the parallel connection of the first application end heat exchanger 203 is the same as the above-mentioned embodiment, and will not be described here.

[0078] The second application end heat exchanger 206 can be set multiple according to requirements. When the second application end heat exchanger 206 is set multiple, each of the second application end heat exchangers 206 is connected in parallel on the loop of the first water circulation system. The effect brought by the parallel connection of the second application end heat exchanger 206 is the same as the above-mentioned embodiment, and will not be described here.

[0079] The water inlet sides of the first application end heat exchanger 203 and the second application end heat exchanger 206 are connected in parallel through the first three-way valve 302; and the water outlet sides of the first application end heat exchanger 203 and the second application end heat exchanger 206 are connected in parallel through the second three-way valve 305.

[0080] In order to improve the utilization rate of heat, in the embodiment, the first three-way valve 302 can be an electromagnetic switching valve, that is, the communication state of the first refrigerant heat exchanger 103 with the first application end heat exchanger 203 and / or the second application end heat exchanger 206 can be adjusted according to requirements.

[0081] For the convenience of understanding, the three valve ports of the first three-way valve 302 are defined as a first port, a second port and a third port. The first port is in communication with the first refrigerant heat exchanger 103, the second port is in communication with the first application end heat exchanger 203, and the third port is in communication with the second application end heat exchanger 206.

[0082] When the first three-way valve 302 is in the first working mode, the first port is in communication with the second port and is cut off from the third port. At this time, the first refrigerant heat exchanger 103 exchanges heat only with the first application end heat exchanger 203 and does not exchange heat with the second application end heat exchanger 206, so that the first application end heat exchanger 203 can quickly heat the user end device 204.

[0083] When the first three-way valve 302 is in the second working mode, the first port is in communication with the third port and is cut off from the second port. At this time, the first refrigerant heat exchanger 103 exchanges heat only with the second application end heat exchanger 206 and does not exchange heat with the first application end heat exchanger 203, so that the second application end heat exchanger 206 can quickly heat the indoor environment.

[0084] When the first three-way valve 302 is in the third working mode, the first port is in communication with the second port and the third port. At this time, the first refrigerant heat exchanger 103 can exchange heat with the first application end heat exchanger 203 and the second application end heat exchanger 206 at the same time, so that the first application end heat exchanger 203 can heat the user end device 204 and the second application end heat exchanger 206 can also heat the indoor environment.

[0085] Based on the above, the user can switch the working mode of the first three-way valve 302 according to requirements to achieve the effect in the corresponding working mode. For example, when the user needs to quickly heat the water in the user end device 204 (such as a water heater) before taking a bath, the first three-way valve 302 can be switched to the first working mode, so that the first refrigerant heat exchanger 103 exchanges heat only with the first application end heat exchanger 203. When the user does not need to use the water in the user end device 204 (such as a water heater), the first three-way valve 302 can be switched to the second working mode, so that the first refrigerant heat exchanger 103 exchanges heat only with the second application end heat exchanger 206. In this way, the indoor temperature can be maintained at a comfortable temperature, and energy saving can also be achieved. When the user needs to use hot water but does not want to lower the indoor temperature, the first three-way valve 302 can be switched to the third working mode.

[0086] In addition, it should be noted that when used in summer, the second application end heat exchanger 206 needs to provide cold to the indoor environment of the user, and if the user needs to use the user end device 204 (such as a water heater) to provide hot water at this time, the four-way valve 102 needs to switch the first refrigerant heat exchanger 103 to a heating state. In order to avoid the discomfort caused by the increase of the indoor environment temperature due to the heating of the second application end heat exchanger 206, the first three-way valve 302 can be switched to the first working mode, that is, the second application end heat exchanger 206 is shielded. When the user no longer uses the user end device 204 (such as a water heater) to provide hot water, the four-way valve 102 needs to switch the first refrigerant heat exchanger 103 back to the refrigeration state, and at the same time, the first three-way valve 302 is switched to the second working mode, restoring the refrigeration capacity of the second application end heat exchanger 206, and shielding the first application end heat exchanger 203.

[0087] In an embodiment of the present application, a circulating water pump 207 and an expansion tank 202 are connected in series on the loop of the first water circulation system. The expansion tank 202 is arranged upstream of the first application end heat exchanger 203 and the second application end heat exchanger 206. The circulating water pump 207 can be arranged downstream of the first application end heat exchanger 203 and the second application end heat exchanger 206.

[0088] The circulating water pump 207 is used to circulate water in the first water circulation system. In the present embodiment, the circulating water pump 207 is arranged downstream of the first application end heat exchanger 203 and the second application end heat exchanger 206, so that the water flowing through the circulating water pump 207 is water that has been heat-exchanged by the first application end heat exchanger 203 and the second application end heat exchanger 206, and the water temperature is relatively stable and will not be too high or too low, which helps to improve the service life of the circulating water pump 207 and reduce the mechanical seal damage or cavitation problems caused by high / low temperature.

[0089] In addition, in the present embodiment, an expansion tank 202 is arranged on the loop of the first water circulation system. The expansion tank 202 is also called an expansion tank or a pressure expansion tank. Its main function is to absorb and adjust the volume expansion caused by the change of water temperature, so as to maintain the stable pressure of the first water circulation system, prevent the pressure from being too high, and protect the equipment on the first water circulation system.

[0090] In the present embodiment, the expansion tank 202 is arranged upstream of the first application end heat exchanger 203 and the second application end heat exchanger 206, so that the water in the expansion tank 202 is water that has not been heat-exchanged by the first application end heat exchanger 203 and the second application end heat exchanger 206. The water temperature in the expansion tank 202 is higher / lower (in the heating mode, the water temperature in the expansion tank 202 is higher; in the refrigeration mode, the water temperature in the expansion tank 202 is lower), which can more effectively absorb the volume expansion caused by the change of water temperature, avoid the fluctuation of system pressure, and be more conducive to maintaining the stable pressure of the system, preventing the pressure from being too high or too low to cause damage to the equipment and pipelines.

[0091] The user-side device 204 can also exchange heat with the first application-side heat exchanger 203 through the water circulation system. Accordingly, the water circulation system of the user-side device 204 also needs to be driven by the water pump 205 to circulate water. The water pump 205 can also be arranged downstream of the user-side device 204, and has the same effect as the circulating water pump 207, which will not be described herein.

[0092] When the user-side device 204 is a water heater, it is provided with a water replenishing valve 303 and a water mixing valve 304 for controlling domestic water. The external water pipe can replenish water for the user-side device 204 through the water replenishing valve 303, and the water mixing valve 304 can adjust the water temperature of the water outlet of the user-side device 204, that is, by adjusting the amount of cold water mixed and the amount of hot water of the user-side device 204, the temperature of the water discharged by the water mixing valve 304 can be adjusted.

[0093] When the first refrigerant heat exchanger 103 is in a heating state, the water in the first water circulation system contains gas, and the accumulation of gas in the first water circulation system will cause air resistance, affecting water flow and heat exchange efficiency. Based on this, the embodiment can also be connected in series with an air exhaust valve 301 and an electric heating device 201 on the loop of the first water circulation system.

[0094] The main function of the air exhaust valve 301 is to exhaust the air accumulated in the first water circulation system to ensure normal operation of the system. In addition, by exhausting the gas through the air exhaust valve 301, cavitation can be avoided in the circulating water pump 207 and the pipeline, and at the same time, it can be ensured that the first application-side heat exchanger 203 and the second application-side heat exchanger 206 are filled with water, thereby improving the heat exchange efficiency. At the same time, the exhaust air can also prevent pressure fluctuations, avoid noise caused by the mixing of water flow and air, reduce the corrosion of oxygen to the pipeline, and prolong the service life of the pipeline, the first application-side heat exchanger 203 and the second application-side heat exchanger 206.

[0095] The air exhaust valve 301 can be arranged upstream of the first application-side heat exchanger 203 and the second application-side heat exchanger 206, so that the circulating water exhausts air before entering the first application-side heat exchanger 203 and the second application-side heat exchanger 206, preventing the influence of air on the first application-side heat exchanger 203 and the second application-side heat exchanger 206.

[0096] The embodiment increases the electric heating device 201 on the first water circulation system, which can assist in increasing the temperature of the circulating water through the electric heating device 201, so as to supplement the deficiency of the first refrigerant heat exchanger 103 when a higher water temperature is needed.

[0097] The air conditioner heat pump system disclosed by the embodiments of the present application comprises the heat exchange system disclosed by the above embodiments, wherein the refrigerant circulation system is integrated on the outdoor unit side, and part of the water circulation system is arranged at the user end according to the use requirement, for example, the water circulation system with the water heat exchanger can be arranged at the user end, and the heat and cold energy are utilized.

[0098] The air conditioner heat pump system disclosed by the embodiments of the present application has all the technical effects of the heat exchange system, and the details are not described herein.

[0099] As shown in the present application and claims, unless the context clearly indicates otherwise, the words "one", "an", "a", and / or "the" do not mean the singular, but can also include the plural. Generally, the terms "comprise" and "include" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements. The element defined by the statement "comprising a" does not exclude the presence of another identical element in the process, method, product or device comprising the element.

[0100] In the description of the present application, unless otherwise explicitly limited, the words such as arrangement, installation, connection, etc. should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0101] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0102] The principles and implementation modes of the present application are described by using specific examples, and the above description of the embodiments is only used to help understand the method and its core idea of the present application. It should be pointed out that for the person skilled in the art, without departing from the principles of the present application, some improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A heat exchange system characterized by, The application relates to a refrigerant circulation system and a water circulation system. The refrigerant circulation system comprises a compressor (101), a throttling device (105), a first refrigerant heat exchanger (103) and a second refrigerant heat exchanger (106), refrigerant heat exchange pipelines of the first refrigerant heat exchanger (103) and the second refrigerant heat exchanger (106) are communicated with each other to form a refrigerant circulation loop, the throttling device (105) is arranged on the refrigerant circulation loop and located between the first refrigerant heat exchanger (103) and the second refrigerant heat exchanger (106), the compressor (101) is used for driving refrigerant to circulate in the refrigerant circulation loop, and the first refrigerant heat exchanger (103) and the second refrigerant heat exchanger (106) are both plate heat exchangers. The water circulation system is connected with the water heat exchange pipelines of the first refrigerant heat exchanger (103) and the second refrigerant heat exchanger (106), and at least one water circulation system is provided with a water heat exchanger.

2. The heat exchange system of claim 1, wherein, The water circulation system connected with the first refrigerant heat exchanger (103) is a first water circulation system, and the water circulation system connected with the second refrigerant heat exchanger (106) is a second water circulation system. The first water circulation system and the second water circulation system are both provided with the water heat exchanger, or the first water circulation system is provided with the water heat exchanger, and the second water circulation system is used for being connected with an external water source.

3. The heat exchange system of claim 2, wherein, The water heat exchanger on the first water circulation system at least comprises a first application end heat exchanger (203) and a second application end heat exchanger (206), and the first application end heat exchanger (203) and the second application end heat exchanger (206) have different functions.

4. The heat exchange system of claim 3, wherein, The first application end heat exchanger (203) is used for heat exchange with a user end device (204). And / or, The second application end heat exchanger (206) is used for heat exchange with an indoor environment.

5. The heat exchange system of claim 4, wherein, The first application end heat exchanger (203) is a plate heat exchanger, and the user end device (204) is a water heater. And / or, The second application end heat exchanger (206) comprises one or more of a fan coil, a floor heating heat exchanger and a water heater.

6. The heat exchange system of claim 3, wherein, The first application end heat exchanger (203) and the second application end heat exchanger (206) are connected in parallel on a loop of the first water circulation system. And / or, The first application end heat exchanger (203) is multiple, and each first application end heat exchanger (203) is connected in parallel on the loop of the first water circulation system. And / or, The second application end heat exchanger (206) is multiple, and each second application end heat exchanger (206) is connected in parallel on the loop of the first water circulation system.

7. The heat exchange system of claim 6, wherein, The water inlet sides of the first application end heat exchanger (203) and the second application end heat exchanger (206) are connected in parallel through a first three-way valve (302). The water outlet sides of the first application end heat exchanger (203) and the second application end heat exchanger (206) are connected in parallel through a second three-way valve (305).

8. The heat exchange system of claim 7, wherein, The first three-way valve (302) comprises a first port, a second port and a third port, the first port is communicated with the first refrigerant heat exchanger (103), the second port is communicated with the first application end heat exchanger (203), and the third port is communicated with the second application end heat exchanger (206); When the first three-way valve (302) is in the first working mode, the first port is communicated with the second port, and is cut off with the third port; When the first three-way valve (302) is in the second working mode, the first port is communicated with the third port, and is cut off with the second port; When the first three-way valve (302) is in the third working mode, the first port is communicated with the second port and the third port.

9. Heat exchange system according to any of claims 3-8, characterized in that The circulating water pump (207) and the expansion tank (202) are connected in series on the loop of the first water circulation system.

10. The heat exchange system of claim 9, wherein, The expansion tank (202) is arranged upstream of the first application end heat exchanger (203) and the second application end heat exchanger (206). And / or, The circulating water pump (207) is arranged downstream of the first application end heat exchanger (203) and the second application end heat exchanger (206).

11. The heat exchange system of any one of claims 3-8, wherein, The exhaust valve (301) and the electric heating device (201) are arranged upstream of the first application end heat exchanger (203) and the second application end heat exchanger (206).

12. The heat exchange system of claim 11, wherein, The heat exchange system comprises the heat exchange system according to any one of claims 1-12, wherein the refrigerant circulation system is integrated in the outdoor unit.

13. An air conditioning and heat pump system characterized by comprising: ​

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