Heat pump system

Abstract

The utility model discloses a heat pump system which comprises a refrigerant loop formed by connecting a compressor, a first outdoor heat exchanger and an indoor heat exchanger through piping; the refrigerant branch is connected to the refrigerant loop, and a second outdoor heat exchanger is connected to the refrigerant branch; the water circulation loop flows through the second outdoor heat exchanger, and an indoor coil pipe and a pumping device for driving water flow to flow are arranged on the water circulation loop; the temperature detection unit is used for detecting the outdoor environment temperature, the indoor return air temperature and the indoor coil pipe temperature; the controller is configured to obtain the outdoor environment temperature, the indoor return air temperature and the indoor coil pipe temperature when the system operates in a refrigeration mode. And when it is determined that the outdoor environment temperature, the indoor return air temperature and the indoor coil pipe temperature meet the first preset condition, the refrigerant branch is controlled to be conducted, and the pumping device is started. According to the heat pump system, the second outdoor heat exchanger is arranged, and auxiliary heat dissipation can be conducted through heat exchange between the second outdoor heat exchanger and water in the water circulation loop during high-temperature refrigeration of the air conditioner.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat pump system technical field, concretely relates to a heat pump system structure with water system. BACKGROUND

[0002] Air conditioner plays a main refrigeration role in summer high temperature, but due to the standard beauty of residential building, air conditioner outdoor unit is usually hidden and assembled in louver, leading to poor air conditioner heat dissipation condition, and the requirement of air conditioner summer high temperature refrigeration capacity is higher and higher.

[0003] In some summer high temperature city, summer maximum temperature can reach 45 DEG C, and if air conditioner installation environment is poor and ventilation is not smooth, the temperature where air conditioner is located can be increased by 10 DEG C or more, and the heat dissipation environment of air conditioner can be between 55-60 DEG C, seriously affecting the play of air conditioner refrigeration capacity.

[0004] In order to improve the high temperature refrigeration capacity of air conditioner, the upper limit of system pressure needs to be improved, and the upper limit of temperature resistance of electrical components, so that the selection specification of air conditioner system and electrical components is higher and higher, which increases the cost of air conditioner invisibly.At the same time, the increase of system pressure makes the compression ratio of compressor increase, and the operation efficiency of compressor decreases, which increases the energy consumption of system. SUMMARY

[0005] In view of the above technical problems pointed out in the background art, a heat pump system is provided, which is provided with a second outdoor heat exchanger for cooperating with the main first outdoor heat exchanger, which can assist heat dissipation through the heat exchange between the second outdoor heat exchanger and water in the water circulation loop when the air conditioner is refrigerated in high temperature, and improve the summer high temperature refrigeration capacity of air conditioner.

[0006] A heat pump system, comprising:

[0007] A first refrigerant circuit for circulating the refrigerant in a circulation loop composed of a compressor, an outdoor heat exchanger, a first throttling element and an indoor heat exchanger;

[0008] A second refrigerant circuit for circulating the refrigerant in a circulation loop composed of a compressor, a water-fluorine heat exchanger, a second throttling element and an indoor heat exchanger;

[0009] A water circulation loop for circulating water in a circulation loop composed of a first use side end and a water-fluorine heat exchanger;

[0010] A drain line, which makes water flow from the water outlet end of the water-fluorine heat exchanger to the second use side end through the reversing valve.

[0011] In some embodiments of the present application, the reversing valve is a three-way valve, which comprises a first valve port, a second valve port and a third valve port;

[0012] The first valve port is connected with the water outlet of the water-fluorine heat exchanger, the second valve port is connected with the second use-side terminal, and the third valve port is connected with the water inlet of the first use-side terminal.

[0013] In some embodiments of the present application, when the first valve port is in communication with the third valve port, the drain pipeline is in communication; and when the first valve port is in communication with the second valve port, the water circulation loop is in communication.

[0014] In some embodiments of the present application, the three-way valve is an electric three-way valve.

[0015] In some embodiments of the present application, a pumping device is arranged on the pipeline between the water outlet of the first use-side terminal and the water inlet of the water-fluorine heat exchanger.

[0016] In some embodiments of the present application, a first water supplement pipeline is further arranged on the pipeline between the water outlet of the water-fluorine heat exchanger and the first use-side terminal, for supplementing water to the water circulation loop; and a second water supplement pipeline is further arranged on the drain pipeline, for supplementing water to the drain pipeline.

[0017] In some embodiments of the present application, a water supplement valve is arranged on each of the first water supplement pipeline and the second water supplement pipeline, for controlling the on-off of water supplement.

[0018] In some embodiments of the present application, the first use-side terminal is a floor heating coil, and the second use-side terminal is a toilet.

[0019] In some embodiments of the present application, in a first use state, the first valve port and the third valve port of the three-way valve are in communication, the water circulation loop is in communication, the pumping device is in operation, the second throttling element is opened, and the outdoor heat exchanger and the water-fluorine heat exchanger both work as condensers; after the second use-side terminal is drained, the first valve port and the second valve port are in communication, the drain pipeline is in communication, and water is supplemented to the second use-side terminal.

[0020] In some embodiments of the present application, after the second use-side terminal is supplemented with water, the first use-side terminal is supplemented with water in linkage, so as to reduce the water temperature. In some other embodiments of the present application, in order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0021] A heat pump system comprises:

[0022] A refrigerant circuit is formed by connecting an outdoor unit having a compressor and a first outdoor heat exchanger, and an indoor unit having an indoor heat exchanger, through a pipeline;

[0023] A refrigerant branch connected to the refrigerant circuit, a second outdoor heat exchanger connected in parallel with the first outdoor heat exchanger being connected to the refrigerant branch;

[0024] A water circulation circuit flowing through the second outdoor heat exchanger and capable of exchanging heat with the second outdoor heat exchanger, the water circulation circuit being provided with an indoor coil and a pumping device for driving water flow;

[0025] A temperature detection unit for detecting an outdoor ambient temperature, an indoor return air temperature and an indoor coil temperature;

[0026] A controller configured to, when the outdoor unit is in refrigeration operation, acquire the outdoor ambient temperature, the indoor return air temperature and the indoor coil temperature detected by the temperature detection unit;

[0027] When it is determined that the outdoor ambient temperature, the indoor return air temperature and the indoor coil temperature satisfy a first preset condition, the controller controls the refrigerant branch to be conducted and the pumping device to be started to make the second outdoor heat exchanger and the water circulation circuit exchange heat, wherein the first preset condition is a condition related to whether the second outdoor heat exchanger can be started.

[0028] The above embodiment has the following advantages and effects:

[0029] When the air conditioning system is in refrigeration operation, the outdoor ambient temperature, the indoor return air temperature and the indoor coil temperature can be detected in real time by the temperature detection unit to determine whether the air conditioning system is in high-temperature refrigeration mode, and when it is determined that the air conditioning system is in high-temperature refrigeration, the refrigerant branch is controlled to be conducted and the water circulation circuit is started to make the second outdoor heat exchanger exchange heat with the water system to assist the first outdoor heat exchanger to dissipate heat, thereby improving the heat dissipation capacity and high-temperature refrigeration capacity of the air conditioning system.

[0030] In some embodiments of the present application, the first preset condition is that the outdoor ambient temperature is greater than a first preset ambient temperature, the indoor return air temperature is less than or equal to a first indoor set temperature, and the indoor coil temperature is less than or equal to a coil set temperature.

[0031] The above embodiment has the following advantages and effects:

[0032] When the outdoor ambient temperature is greater than the first preset ambient temperature and the indoor return air temperature is less than or equal to the first indoor set temperature, it can be determined that the outdoor ambient temperature is too high and the indoor return air temperature is too low, and the air conditioning system has insufficient refrigeration capacity; when the indoor coil temperature is less than or equal to the coil set temperature, it can be determined that the indoor coil temperature is not high; and when the air conditioning system has insufficient refrigeration capacity and the coil temperature is not high, the heat exchange condition for starting the second outdoor heat exchanger is satisfied.

[0033] In some embodiments of the present application, the controller is configured to: after the refrigerant branch is controlled to perform the on operation, acquire the indoor return air temperature and the indoor coil temperature detected by the temperature detection unit; and when the indoor return air temperature meets a second preset condition or the indoor coil temperature meets a third preset condition, control the refrigerant branch to be disconnected.

[0034] The second preset condition is a condition for determining that the indoor return air temperature meets a refrigeration temperature.

[0035] The third preset condition is a condition for determining that the indoor coil temperature is too high.

[0036] The above embodiments have the following advantages and effects:

[0037] When the indoor coil temperature is too high, the indoor temperature will rise, which will affect the refrigeration effect. Therefore, the control of the control unit is to disconnect the refrigerant branch when one of the following conditions is met: the indoor coil temperature meets the third preset condition or the indoor return air temperature meets the second preset condition, so as to ensure the refrigeration effect.

[0038] In some embodiments of the present application, the second preset condition is that the indoor return air temperature is greater than a second indoor set temperature; and the third preset condition is that the indoor coil temperature is greater than a second coil set temperature.

[0039] The second coil set temperature is greater than the first coil set temperature, and the second indoor set temperature is greater than the first indoor set temperature.

[0040] The above embodiments have the following advantages and effects:

[0041] After the refrigerant branch is turned on, it will continuously exchange heat with the water circulation loop, which will continuously increase the indoor coil temperature. The second outdoor heat exchanger participates in heat dissipation, which will improve the refrigeration capacity, and the indoor return air temperature will continuously decrease.

[0042] Therefore, the refrigerant branch can be disconnected when the indoor return air temperature meets the refrigeration temperature requirement or the indoor coil temperature is too high, so as to ensure the refrigeration effect of the air conditioning system.

[0043] In some embodiments of the present application, the following are included:

[0044] A drain pipeline is connected to the water circulation loop, and a water containing and draining component for containing a certain amount of water and draining water outward is connected to the drain pipeline.

[0045] A control valve is arranged at the connection between the water circulation loop and the drain pipeline, and has a first state and a second state.

[0046] When the control valve is in the first state, the water flow is circulated back and forth along the water circulation loop under the driving of the pumping device;

[0047] When the control valve is in the second state, the water flow stored in the indoor coil is transported to the water storage and drainage component along the drainage pipeline under the driving of the pumping device, and the water flow does not circulate back and forth along the water circulation loop.

[0048] The above embodiments have the following advantages and effects:

[0049] By setting the control valve having the first state and the second state, the water flow flowing out of the water outlet side of the outdoor heat exchanger can be switched, and when the water system needs to be turned on, it is switched to the first state to assist in heat dissipation through the water circulation loop and the second outdoor heat exchanger.

[0050] When the indoor coil temperature is too high and high-temperature hot water needs to be discharged, the control valve can be switched to the second state to discharge the high-temperature water flow in the water circulation loop to the water storage and drainage component, so as to avoid the influence of the indoor coil temperature on the indoor temperature and the influence on the refrigeration effect.

[0051] In some embodiments of the present application, the controller is configured to: when it is determined that the outdoor ring temperature, the indoor return air temperature, and the indoor coil temperature satisfy a first preset condition, control the control valve to be in the first state.

[0052] The above embodiments have the following advantages and effects:

[0053] When it is detected that the outdoor ring temperature, the indoor return air temperature, and the indoor coil temperature satisfy the first preset condition, it indicates that the system satisfies the opening condition of the second outdoor heat exchanger, and the control valve is switched to the first state position by the control part, so that the water flow flows in the water circulation loop to dissipate heat for the second outdoor heat exchanger.

[0054] In some embodiments of the present application, the heat pump system comprises: a first water supplement pipeline connected to the water circulation loop, used for supplementing water to the water circulation loop;

[0055] A second water supplement pipeline connected to the drainage pipeline, used for supplementing water to the water storage and drainage component.

[0056] The above embodiments have the following advantages and effects:

[0057] When the control valve is in the second state, the water flow in the water circulation loop will flow into the drainage pipeline and enter the inside of the water storage and drainage component, at this time, it will cause the water flow and water pressure in the entire water circulation loop to decrease, and the first water supplement pipeline can be used for supplementing water to the water circulation loop to ensure the water amount in the water circulation loop and the water temperature in the water circulation loop.

[0058] When the indoor coil temperature is not high, the water circulation loop and the second outdoor heat exchanger can normally exchange heat, and if the water level in the water storage and drainage component is low due to drainage at this time, the second water supplement pipeline can be controlled to be conducted to supplement water for the water storage and drainage component alone, so as to ensure normal use of the water storage and drainage component.

[0059] In some embodiments of the present application, the controller is configured to: when the water storage and drainage component is in the drainage state, acquire the system running state and the indoor coil temperature;

[0060] When it is determined that the system is in the refrigeration running state and the indoor coil temperature is greater than the third indoor coil temperature, the control valve is controlled to be in the second state to make the water circulation loop supplement water for the water storage and drainage component, and the first water supplement pipeline is controlled to be conducted to supplement water for the water circulation loop.

[0061] The above embodiments have the following advantages and effects:

[0062] After the water storage and drainage component drains water, the water pressure decreases, and the internal water flow storage amount becomes less. If it is detected that the system is in the refrigeration running state and the indoor coil temperature reaches a value higher than the third indoor coil temperature, it indicates that the indoor coil temperature is continuously rising due to heat exchange with the second outdoor heat exchanger.

[0063] To avoid the indoor coil temperature from being too high, the control valve can be controlled to be in the second state, the water circulation loop is used to supplement water for the water storage and drainage component, and the first water supplement pipeline is controlled to supplement water for the water circulation loop, so as to keep the water flow in the water circulation loop stable.

[0064] In some embodiments of the present application, the heat pump system comprises a water level detection element arranged in the water storage and drainage component and used to detect the water level of the water storage and drainage component.

[0065] The controller is configured to: after the control valve is controlled to be in the second state and the first water supplement pipeline is conducted, acquire the value of the water level detection element.

[0066] When it is determined that the value of the water level detection element reaches a preset water level, the control valve is controlled to switch to the first state and the first water supplement pipeline is controlled to be disconnected.

[0067] The above embodiments have the following advantages and effects:

[0068] By acquiring the value of the water level detection element, the water level in the water storage and drainage component can be detected in real time, and when it is detected that the water level reaches the set water level, the first water supplement pipeline can be disconnected to terminate water supplement.

[0069] In some embodiments of the present application, the controller is configured to: when the water storage and drainage component is in the drainage state, acquire the system running state and the indoor coil temperature;

[0070] When it is determined that one of the system being in a refrigeration operation state and the indoor coil temperature being greater than the third indoor coil temperature is not satisfied, the control valve is controlled to be in a first state, and the second water supplement pipeline is controlled to be open to supplement water for the water storage and drainage component;

[0071] When it is determined that the water level detection element value reaches a preset water level, the second water supplement pipeline is controlled to be closed.

[0072] The above embodiment has the following advantages and effects:

[0073] When the water storage and drainage component drains water, the internal water flow storage amount becomes less, at this time, the water storage and drainage component needs to be supplemented with water, at this time, if it is detected that one of the system being in a refrigeration operation state and the indoor coil temperature being greater than the third indoor coil temperature is satisfied, it indicates that the system is not in a high-temperature environment refrigeration at this time.

[0074] If it is detected that the system is not in a high-temperature environment refrigeration state, water supplement through the water circulation loop is not needed, but water supplement through the second drainage pipeline to the water storage and drainage component can be used to ensure that the water circulation loop is normally exchanged with the second outdoor heat exchanger.

[0075] Other features and advantages of the present application will become more apparent after reading the specific embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0076] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative labor under the premise of the drawings.

[0077] Figure 1 It is a structure schematic diagram of a heat pump system according to an embodiment;

[0078] Figure 2 It is a structure schematic diagram of another heat pump system according to an embodiment;

[0079] Figure 3 It is a water flow path structure schematic diagram when the control valve of the heat pump system according to an embodiment is in a first state;

[0080] Figure 4 It is a water flow path structure schematic diagram when the control valve of the heat pump system according to an embodiment is in a second state;

[0081] Figure 5 It is a structure schematic diagram of a heat pump system with a first water supplement pipeline and a second water supplement pipeline according to an embodiment;

[0082] Figure 6Structure schematic diagram of another heat pump system with a first water supplement pipeline and a second water supplement pipeline according to the embodiment;

[0083] Figure 7 Control logic flow chart for controlling the second outdoor heat exchanger to be opened according to the heat pump system of the embodiment;

[0084] Figure 8 Logic flow chart for controlling the control valve according to the heat pump system of the embodiment;

[0085] Figure 9 Logic flow chart for controlling the water circulation loop to supplement the water storage and drainage component according to the heat pump system of the embodiment;

[0086] Figure 10 Logic flow chart for controlling the second water supplement pipeline to supplement the water storage and drainage component according to the heat pump system of the embodiment.

[0087] Reference signs:

[0088] Wherein, 110, compressor; 120, refrigerant circuit; 130, refrigerant branch; 140, gas-liquid separator; 150, first electronic expansion valve; 160, second electronic expansion valve; 210, first outdoor heat exchanger; 220, second outdoor heat exchanger; 300, indoor heat exchanger; 410, water circulation loop; 420, indoor coil; 430, pumping device; 500, drainage pipeline; 600, water storage and drainage component; 700, control valve; 810, first water supplement pipeline; 820, second water supplement pipeline. DETAILED DESCRIPTION

[0089] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0090] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0091] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0092] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0093] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0094] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0095] In some embodiments of this application, a heat pump system is proposed, which includes two parts: an air conditioning system and a water system. The air conditioning system is mainly used to achieve cooling or heating, while the water system can flow through the air conditioning system to exchange heat with it.

[0096] In some embodiments of the present application, the air conditioning system includes a refrigerant circuit 120 formed by connecting at least a compressor 110 constituting an outdoor unit, a first outdoor heat exchanger 210, and an indoor heat exchanger 300 constituting an indoor unit through a pipe.

[0097] The air conditioning system performs a refrigeration cycle of an air conditioner by using a compressor 110, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat an indoor space.

[0098] The low-temperature and low-pressure refrigerant enters the compressor 110, which compresses the refrigerant gas into a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0099] The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant formed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor 110. The evaporator can achieve a refrigeration effect by exchanging heat with a material to be cooled using the latent heat of evaporation of the refrigerant. Throughout the cycle, the air conditioner can adjust the temperature of the indoor space.

[0100] The outdoor unit of the air conditioner refers to the part of the refrigeration cycle including the compressor 110 and the outdoor heat exchanger, and the indoor unit of the air conditioner includes the indoor heat exchanger. The expansion valve can be provided in the indoor unit or the outdoor unit.

[0101] The indoor heat exchanger 300 and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger 300 serves as a condenser, the air conditioner functions as a heater in a heating mode, and when the indoor heat exchanger 300 serves as an evaporator, the air conditioner functions as a cooler in a cooling mode.

[0102] In some embodiments of the present application, the outdoor unit further includes a gas-liquid separator 140 connected to the compressor 110, which receives refrigerant from the high-pressure side compressor 110 to reduce system pressure.

[0103] In some embodiments of the present application, the outdoor unit includes a first electronic expansion valve 150 connected to the first outdoor heat exchanger 210 side, which can control the amount of refrigerant entering the first outdoor heat exchanger 210 by adjusting its opening degree.

[0104] In some embodiments of the present application, the indoor unit of the air conditioning system is provided one or more, and when multiple indoor units are provided, the multiple indoor units are connected in parallel to the refrigerant circuit 120, sharing one outdoor unit.

[0105] By connecting and using the plurality of indoor units and the one outdoor unit, a multi-connected structure is formed, so that at least one of the plurality of indoor units is used for refrigeration or heating.

[0106] In some embodiments of the present application, the air conditioning system further comprises a refrigerant branch 130 connected to the refrigerant circuit 120, and a second outdoor heat exchanger 220 connected in parallel with the first outdoor heat exchanger 210 on the refrigerant branch 130.

[0107] By providing the refrigerant branch 130 and the second outdoor heat exchanger 220 arranged on the refrigerant branch 130, when the outdoor ambient temperature is high and the high-temperature refrigeration capacity of the air conditioning system is insufficient, the second outdoor heat exchanger 220 can be turned on to cooperate with the first outdoor heat exchanger 210 to dissipate heat together, thereby improving the heat dissipation capacity and the refrigeration capacity at high temperature.

[0108] In some embodiments of the present application, a second electronic expansion valve 160 is provided on the refrigerant branch 130, at least for controlling the opening and closing of the refrigerant branch 130. In use, the second electronic expansion valve 160 can be controlled to open and close according to the actual outdoor ambient temperature, so as to control whether the second outdoor heat exchanger 220 participates in heat exchange.

[0109] The second outdoor heat exchanger 220 is arranged in parallel with the first outdoor heat exchanger 210, which can ensure that when the refrigerant branch 130 is turned on, the refrigerant in the split refrigerant circuit 120 and the first outdoor heat exchanger 210 cooperate to dissipate heat together, thereby improving the heat dissipation capacity.

[0110] In some embodiments of the present application, the water system comprises a water circulation circuit 410, and the water circulation circuit 410 flows through the second outdoor heat exchanger 220 and can exchange heat with the second outdoor heat exchanger 220.

[0111] The second outdoor heat exchanger 220 is a plate heat exchanger, part of the heat exchange tubes of which are used for the refrigerant split from the refrigerant circuit 120, and part of the heat exchange tubes are used for the water flow of the water circulation circuit 410. The refrigerant flowing through the inside of the heat exchange tubes exchanges heat with the water flow flowing through the inside of the heat exchange tubes, so as to achieve the effect of heat exchange between the water flow and the refrigerant in the water circulation circuit 410.

[0112] In some embodiments of the present application, an indoor coil 420 and a pumping device 430 for driving the water flow are provided on the water circulation circuit 410.

[0113] The pumping device 430 is a water pump, and the indoor coil 420 is a floor heating coil. The water pump and the floor heating coil are connected by a water pipe to form the water circulation circuit 410, and the water flow of the water circulation circuit 410 flows through the second outdoor heat exchanger 220.

[0114] When the water system is running, the pumping device 430 is in action to drive the water flow to circulate between the plate heat exchanger and the floor heating coil.

[0115] In some embodiments of the present application, the heat pump system comprises a temperature detection unit for detecting the outdoor ambient temperature, the indoor return air temperature and the indoor coil temperature.

[0116] The temperature detection unit comprises an outdoor ambient temperature sensor for detecting the outdoor ambient temperature, and the outdoor ambient temperature is denoted as Ta.

[0117] The return air temperature sensor is arranged on the return air side of the indoor unit for detecting the return air side temperature of the indoor unit, and the return air side temperature is denoted as Ti.

[0118] The indoor coil temperature sensor is arranged on the indoor coil 420 for detecting the temperature of the indoor coil 420, and the temperature of the indoor coil 420 is denoted as Tg.

[0119] The temperature detection unit can be used to detect the outdoor ambient temperature, the return air side temperature of the indoor unit and the temperature of the indoor coil in real time, so as to determine whether the second outdoor heat exchanger 220 needs to be started to assist in heat dissipation.

[0120] The controller is configured to obtain the outdoor ambient temperature, the return air temperature of the indoor unit and the temperature of the indoor coil 420 detected by the temperature detection unit when the air conditioning system is running in the cooling mode.

[0121] The problem of insufficient cooling capacity only exists when the air conditioning system is running in the cooling mode in a high-temperature environment, so the control unit needs to detect the outdoor ambient temperature in the cooling mode.

[0122] When the air conditioning system is running in the cooling mode in a high-temperature environment, the cooling capacity of the air conditioning system is limited, and the return air side temperature of the indoor cooling unit is affected, so the high-temperature cooling capacity can be obtained by detecting the return air side temperature of the indoor cooling unit.

[0123] The floor heating coil in the indoor unit will have a higher temperature when the second outdoor heat exchanger 220 is started to exchange heat, which will further increase the indoor temperature, so the temperature of the indoor coil 420 needs to be detected when the second outdoor heat exchanger 220 is started to exchange heat in the cooling mode in a high-temperature environment.

[0124] The control unit can determine whether the air conditioning system is running in the cooling mode in a high-temperature environment and whether the second outdoor heat exchanger 220 can be started to exchange heat by obtaining the above three temperatures in real time.

[0125] The control unit is configured to control the refrigerant branch 130 to be turned on and the pumping device 430 to be started to make the second outdoor heat exchanger 220 and the water circulation loop 410 exchange heat when it is determined that the outdoor ambient temperature, the indoor return air temperature and the indoor coil 420 temperature meet the first preset condition, wherein the first preset condition is a condition for enabling the second outdoor heat exchanger 220.

[0126] The first preset condition is a condition for enabling the second outdoor heat exchanger, and the condition for enabling the second outdoor heat exchanger 220 is met when the outdoor ambient temperature, the indoor return air temperature and the indoor coil 420 temperature meet the first preset condition.

[0127] After the condition for enabling the second outdoor heat exchanger 220 is met, the control unit controls the refrigerant branch 130 to be turned on to make the second outdoor heat exchanger 220 and the first outdoor heat exchanger 210 jointly operate to dissipate heat, and simultaneously, the pumping device 430 is started to exchange heat with the second outdoor heat exchanger 220.

[0128] In the initial operation stage, the air conditioning system receives a refrigeration operation instruction and operates according to a conventional refrigeration mode, at this time, only the first outdoor heat exchanger 210 participates in heat dissipation.

[0129] There is a temperature difference in 24 hours a day, the temperature is highest from 10:00 to 14:00 in the daytime, and the highest cooling capacity is required, and in the entire operation process of the air conditioning system part of the heat pump system, the cooling capacity is limited when the temperature continuously rises.

[0130] When the outdoor ambient temperature, the indoor return air temperature and the indoor coil 420 temperature meet the first preset condition, the second outdoor heat exchanger 220 needs to be started to assist in heat dissipation, at this time, the pumping device 430 is started, and the refrigerant branch 130 in which the second outdoor heat exchanger 220 is located is controlled to be turned on, the second outdoor heat exchanger 220 exchanges heat with the water system, the water system assists in heat dissipation, the first outdoor heat exchanger 210 and the second outdoor heat exchanger 220 are both condensers and both dissipate heat, the heat dissipation amount is increased, and the high-pressure side pressure of the system is reduced.

[0131] The temperature of tap water is generally 10-20℃ in summer, and in high-temperature refrigeration in summer, the water system is used to assist in heat dissipation, the high-pressure side heat dissipation capacity is improved, the high-pressure is reduced, the high-temperature refrigeration capacity is improved, and the equipment power consumption is reduced.

[0132] The water temperature of the floor heating coil rises for a short time when dissipating heat, but the room temperature does not rise because the floor heating process is slow, so the high-temperature refrigeration effect can be ensured without causing the indoor temperature to rise.

[0133] The above embodiment has the following advantages and effects:

[0134] When the air conditioning system is in refrigeration operation, the outdoor ambient temperature, the indoor return air temperature and the indoor coil 420 temperature can be detected in real time by the temperature detection unit to determine whether the air conditioning system is in high-temperature refrigeration mode, and when it is determined that the air conditioning is in high-temperature refrigeration, the refrigerant branch 130 is turned on and the water circulation loop 410 is started, so that the second outdoor heat exchanger 220 exchanges heat with the water system to assist the first outdoor heat exchanger 210 to dissipate heat, thereby improving the heat dissipation capacity and high-temperature refrigeration capacity of the air conditioning system.

[0135] In some embodiments of the present application, when the outdoor ambient temperature, the indoor return air temperature and the indoor coil 420 temperature do not satisfy the first preset condition, the refrigerant branch 130 is not controlled to perform the turn-on operation, and the refrigerant circuit 120 remains in the original state.

[0136] When the outdoor ambient temperature, the indoor return air temperature and the indoor coil 420 temperature do not satisfy the first preset condition, the refrigerant branch 130 is not controlled to perform the turn-on operation, and the refrigerant circuit 120 remains in the original state.

[0137] In some embodiments of the present application, the first preset condition is that the outdoor ambient temperature is greater than a first preset environment temperature, the indoor return air temperature is less than or equal to a first indoor set temperature, and the indoor coil 420 temperature is less than or equal to a first coil set temperature.

[0138] Let the first preset environment temperature be B, the first indoor set temperature be Ts-1, and the first coil set temperature be Ts-2.

[0139] That is, Ta>B ℃, Ts≥Ti+1, and Tground≤Ts-2.

[0140] The above embodiments have the following advantages and effects:

[0141] When the outdoor ambient temperature is greater than the first preset environment temperature and the indoor return air temperature is less than or equal to the first indoor set temperature, it can be determined that the outdoor ambient temperature is too high and the indoor return air temperature is too low, and the air conditioning system has insufficient refrigeration capacity. When the indoor coil 420 temperature is less than or equal to the coil set temperature, it can be determined that the indoor coil 420 temperature is not high, and the second outdoor heat exchanger 220 can be opened for heat exchange when the coil temperature is not high under the condition of insufficient refrigeration capacity of the air conditioning system.

[0142] In some embodiments of the present application, the controller is configured to, after the refrigerant branch 130 is controlled to perform the turn-on operation, acquire the indoor return air temperature and the indoor coil 420 temperature detected by the temperature detection unit, and control the refrigerant branch 130 to be turned off when the indoor return air temperature satisfies a second preset condition or the indoor coil 420 temperature satisfies a third preset condition.

[0143] The second preset condition is a condition for determining that the indoor return air temperature meets a refrigeration temperature.

[0144] The third preset condition is a condition for determining that the indoor coil 420 temperature is too high.

[0145] The above embodiment has the following advantages and effects:

[0146] When the indoor coil 420 temperature is too high, the indoor temperature will rise, affecting the refrigeration effect. Therefore, the control of the control unit is to disconnect the refrigerant branch 130 when one of the conditions that the indoor coil 420 temperature meets the third preset condition or the indoor return air temperature meets the second preset condition is met, so as to ensure the refrigeration effect.

[0147] In some embodiments of the present application, the second preset condition is that the indoor return air temperature is greater than a second indoor set temperature; and the third preset condition is that the indoor coil 420 temperature is greater than a second coil set temperature.

[0148] The second indoor set temperature is Ts+1, the second coil set temperature is Tground≤Ts, the second coil set temperature is greater than the first coil set temperature, and the second indoor set temperature is greater than the first indoor set temperature.

[0149] The second preset condition is Ts

[0150] The above embodiment has the following advantages and effects:

[0151] After the refrigerant branch 130 is turned on, it continuously exchanges heat with the water circulation loop 410, which will continuously raise the indoor coil 420 temperature. The second outdoor heat exchanger 220 participates in heat dissipation, which will improve the refrigeration capacity, and the indoor return air temperature will continuously decrease.

[0152] Therefore, as long as the indoor return air temperature meets the second indoor set temperature or the indoor coil 420 temperature is greater than the second coil set temperature, the refrigerant branch 130 can be disconnected to ensure the refrigeration effect of the air conditioning system.

[0153] In some embodiments of the present application, the water circulation loop 410 includes a water outlet main pipe section for outlet water after heat exchange with the second outdoor heat exchanger 220, and a coil inlet water section connected to the indoor coil 420 and the water outlet main pipe section, and a drain pipe 500 connected to the water outlet main pipe section.

[0154] The water flow after heat exchange from the plate heat exchanger flows into the water outlet main pipe section, and from the water outlet main pipe section, the water flow can flow into the drain pipe 500 into the toilet interior or flow into the coil inlet water section into the indoor coil 420.

[0155] In some embodiments of the present application, the drain pipeline 500 is connected with a water storage and drainage component 600 for storing a certain amount of water and draining water outward.

[0156] The water storage and drainage component 600 is a toilet, which includes a toilet tank and a drain passage connected with the toilet tank. The toilet tank can be used to store a certain height of water in a normal state, and the water can be drained outward through the drain passage when used.

[0157] In some embodiments of the present application, a control valve 700 is arranged at the connection between the water outlet main pipe section and the drain pipeline 500 and the coil water inlet section. The control valve 700 can be used to switch the flow path of the water flow flowing out of the water outlet main pipe section, so as to switch the water flow between the drain pipeline and the coil water inlet section.

[0158] In some embodiments of the present application, the control valve 700 has a first state and a second state.

[0159] When the control valve 700 is in the first state, the drain pipeline 500 is not communicated with the water outlet main pipe section, and the coil water inlet section and the water outlet main pipe section are communicated. The water flow is circulated back and forth along the water circulation loop 410 under the driving of the pumping device 430.

[0160] When the control valve 700 is in the first state, the water flow after heat exchange through the plate heat exchanger flows into the indoor coil 420 and circulates between the indoor coil 420 and the plate heat exchanger. At this time, the water flow and the plate heat exchanger exchange heat, so as to reduce the temperature of the refrigerant in the plate heat exchanger, and achieve the effect of assisting the heat exchange of the first outdoor heat exchanger 210.

[0161] When the control valve 700 is in the second state, the drain pipeline 500 and the water outlet main pipe section are communicated, and the coil water inlet section and the water outlet main pipe section are disconnected. The water flow stored in the indoor coil 420 is driven by the pumping device 430 to flow through the second outdoor heat exchanger 220 and then is transported to the water storage and drainage component 600 through the drain pipeline 500, and the water flow does not circulate back and forth along the water circulation loop 410.

[0162] When the control valve 700 is in the first state, the water flow in the water circulation loop 410 will continuously circulate between the plate heat exchanger and the indoor terminal. With heat exchange, the temperature of the water flow will continuously rise. When the water temperature reaches a high temperature, the temperature of the indoor coil 420 will rise, which will cause the indoor temperature to rise.

[0163] At this time, the control valve 700 needs to be controlled to switch to the second state, the water outlet main pipe section is directly connected to the drain pipe 500, the pumping device 430 is actuated, and the water flow is driven to flow from the indoor coil 420, pass through the plate heat exchanger, the water outlet main pipe section, and enter the drain pipe 500, and finally reach the water storage and drainage component, so as to transfer the high-temperature water flow in the water circulation loop 410 to the inside of the water storage and drainage component through the drain pipe 500, to avoid the problem of continuous increase of the indoor temperature caused by the continuous increase of the temperature of the indoor coil 420 due to the excessively high water temperature.

[0164] The above embodiment has the following advantages and effects:

[0165] The control valve 700 with the first state and the second state is arranged, the water flow flowing out of the water outlet side of the outdoor heat exchanger can be switched, the first state is switched to heat exchange through the water circulation loop 410 and the second outdoor heat exchanger 220 to assist heat dissipation when the water system needs to be started,

[0166] When the temperature of the indoor coil 420 is too high and the high-temperature hot water needs to be discharged, the control valve 700 can be switched to the second state to discharge the high-temperature water flow in the water circulation loop 410 to the water storage and drainage component, to avoid the influence of the temperature of the indoor coil 420 on the indoor temperature and the influence on the refrigeration effect.

[0167] In some embodiments of the present application, the control valve 700 is a three-way valve, which has a first valve port, a second valve port, and a third valve port, the first valve port is connected to the water outlet main pipe section, the second valve port is connected to the coil water inlet section, and the third valve port is connected to the drain pipe 500.

[0168] When the control valve 700 is in the first state, the first valve port and the second valve port are connected.

[0169] When the control valve 700 is in the second state, the first valve port and the third valve port are connected.

[0170] In some embodiments of the present application, the controller is configured to control the control valve 700 to be in the first state when it is determined that the outdoor ring temperature, the indoor return air temperature, and the temperature of the indoor coil 420 satisfy the first preset condition.

[0171] In some embodiments of the present application, the water system includes a first water supplement pipe 810 and a second water supplement pipe 820.

[0172] The first water supplement pipe 810 is connected to the water circulation loop 410 and is used to supplement water for the water circulation loop 410, and the first water supplement pipe 810 is used to act in linkage with the drain pipe 500.

[0173] When the drain pipe 500 is connected, it is also opened to supplement water for the water circulation loop 410.

[0174] The first water supplement pipeline 810 is connected between the control valve 700 and the indoor coil 420. When the control valve 700 is switched to the second state, the water flow in the indoor coil 420 enters the water storage and drainage component 600, and the water pressure in the water circulation loop 410 is reduced. Therefore, the first water supplement pipeline 810 needs to be opened to supplement water to the water circulation loop 410.

[0175] The first water supplement pipeline 810 is connected with an external tap water interface, and a first control valve 700 door for controlling the opening and closing of the first water supplement pipeline 810 is arranged above the first water supplement pipeline 810.

[0176] When the first water supplement pipeline 810 needs to be opened, the first control valve 700 door is opened, and the external tap water is introduced into the water circulation loop 410 to supplement water to the water circulation loop 410. At the same time, the introduced tap water also reduces the water temperature in the water circulation loop 410, thereby ensuring the cooling and heat dissipation effect of the water circulation loop 410 on the second outdoor heat exchanger 220.

[0177] Through the cooperation of the first water supplement pipeline 810 and the drainage pipeline 500, when the water temperature in the floor heating coil continuously rises, the high-temperature water is discharged into the water storage and drainage component 600 through the drainage pipeline 500. During the drainage process, the first water supplement pipeline 810 is used to introduce tap water to supplement water. By discharging excess heat and introducing new low-temperature water, the water temperature in the water circulation loop 410 is kept constant.

[0178] In some embodiments of the present application, the water system comprises a second water supplement pipeline 820 connected to the drainage pipeline 500 for supplementing water to the water storage and drainage component 600.

[0179] When the temperature of the indoor coil 420 is not high, the water circulation loop 410 and the second outdoor heat exchanger 220 can normally exchange heat. If the water level in the water storage and drainage component 600 is low due to drainage at this time, the second water supplement pipeline 820 can be controlled to supplement water to the water storage and drainage component 600 alone to ensure normal use of the water storage and drainage component 600.

[0180] The second water supplement pipeline 820 is provided with a second control valve 700, which can be used to control the opening and closing of the second water supplement pipeline 820.

[0181] In some embodiments of the present application, the controller is configured to obtain the system operating state and the temperature of the indoor coil 420 when the water storage and drainage component 600 is in the drainage state. When it is determined that the system is in a refrigeration operating state and the temperature of the indoor coil 420 is greater than a third indoor coil 420 temperature, the control valve 700 is controlled to be in the second state to make the water circulation loop 410 supplement water to the water storage and drainage component 600, and the first water supplement pipeline 810 is controlled to be turned on to supplement water to the water circulation loop 410.

[0182] The water pressure of the water storage and drainage component 600 will decrease after the water is drained, and the internal water flow storage amount will decrease. At this time, the water storage and drainage component 600 needs to be replenished with water, which can be replenished through the water circulation loop 410 or the second water replenishment pipeline 820.

[0183] To determine which way to replenish water, the system operating state and the indoor coil 420 temperature need to be detected. If it is detected that the system is in a refrigeration operating state and the indoor coil 420 temperature is higher than the third indoor coil 420 temperature value, it indicates that the indoor coil 420 temperature is continuously rising due to heat exchange with the second outdoor heat exchanger 220.

[0184] To avoid the indoor coil 420 temperature being too high, the control valve 700 can be controlled to be in the second state to make the drainage pipeline 500 and the water circulation loop 410 communicate, so that the high-temperature water in the indoor coil 420 is transported to the water storage and drainage component for water replenishment, and the first water replenishment pipeline 810 is controlled to replenish water.

[0185] In some embodiments of the present application, a water level detection element is arranged in the water storage and drainage component 600 to detect the water level of the water storage and drainage component 600. The water level detection element can determine whether the water level of the water storage and drainage component 600 meets the standard and whether water replenishment is needed.

[0186] After the control valve 700 is controlled to be in the second state and the first water replenishment pipeline 810 is controlled to replenish water, the control unit can obtain the value of the water level detection element to determine whether the water level of the water storage and drainage component 600 meets the standard.

[0187] When the control unit determines that the value of the water level detection element meets the preset water level, the control valve 700 can be controlled to switch to the first state and the first water replenishment pipeline 810 can be controlled to be disconnected, so as to terminate the water replenishment from the water circulation loop 410 to the water storage and drainage component 600, and ensure the normal operation of the heat pump system.

[0188] In some embodiments of the present application, the controller is configured to: when the water storage and drainage component 600 is in a drainage state, obtain the system operating state and the indoor coil 420 temperature;

[0189] When it is determined that one of the system is in a refrigeration operating state and the indoor coil 420 temperature is greater than the third indoor coil 420 temperature does not meet the condition, the control valve 700 is controlled to be in the first state, and the second water replenishment pipeline 820 is controlled to replenish water for the water storage and drainage component 600.

[0190] When the water storage amount in the water storage and drainage component 600 is reduced, the water storage and drainage component 600 needs to be replenished with water, which can be replenished through the water circulation loop 410 or the second water replenishing pipeline 820.

[0191] At this time, if only one of the following conditions is met, it indicates that the system is not in a high-temperature environment for refrigeration: the system is in a refrigeration operation state, and the temperature of the indoor coil 420 is greater than the temperature of the third indoor coil 420.

[0192] If only the system is detected to be in a refrigeration operation state but the temperature of the indoor coil 420 is not high, it indicates that the water temperature in the water circulation loop 410 is not high.

[0193] Alternatively, only the temperature of the indoor coil 420 is detected to be higher than the temperature of the third indoor coil 420, but the system is not in a refrigeration operation state, which may be in a winter indoor heating mode.

[0194] Therefore, when one of the above two conditions is not met, the heat of the water flow in the water circulation loop 410 does not need to be released through the drainage pipeline 500, but the water storage and drainage component 600 can be replenished with water through the second water replenishing pipeline 820 connected to the drainage pipeline 500.

[0195] The controller is configured to control the second water replenishing pipeline 820 to be disconnected when it is determined that the water level detection element value reaches the preset water level.

[0196] After the water level in the water storage and drainage component 600 reaches the preset water level due to the water replenishment of the second water replenishing pipeline 820, the second water replenishing pipeline 820 is disconnected without the need for continuous water replenishment.

[0197] In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0198] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A heat pump system, characterized by, The heat pump system comprises: a first refrigerant circuit for circulating the refrigerant in a circulation loop composed of a compressor, an outdoor heat exchanger, a first throttling element and an indoor heat exchanger; a second refrigerant circuit for circulating the refrigerant in a circulation loop composed of a compressor, a water-fluorine heat exchanger, a second throttling element and an indoor heat exchanger; a water circulation circuit for circulating water in a circulation loop composed of a first use-side terminal and a water-fluorine heat exchanger; a drainage pipeline for making water flow from a water outlet end of the water-fluorine heat exchanger to a second use-side terminal through a reversing valve.

2. The heat pump system according to claim 1, wherein: the reversing valve is a three-way valve comprising a first valve port, a second valve port and a third valve port; the first valve port is connected to the water outlet of the water-fluorine heat exchanger, the second valve port is connected to the second use-side terminal, and the third valve port is connected to a water inlet of the first use-side terminal.

3. The heat pump system according to claim 2, wherein: when the first valve port is in communication with the third valve port, the drainage pipeline is in communication; when the first valve port is in communication with the second valve port, the water circulation circuit is in communication.

4. The heat pump system of claim 2, wherein, The three-way valve is an electrically-driven three-way valve.

5. The heat pump system according to claim 3, wherein: a pumping device is arranged on a pipeline between a water outlet of the first use-side terminal and a water inlet of the water-fluorine heat exchanger.

6. The heat pump system according to claim 1, wherein: a first water supplementing pipeline is further arranged on a pipeline between the water outlet of the water-fluorine heat exchanger and the first use-side terminal, for supplementing water to the water circulation circuit; a second water supplementing pipeline is further arranged on the drainage pipeline, for supplementing water to the drainage pipeline.

7. The heat pump system of claim 6, wherein, A water supplementing valve is arranged on each of the first water supplementing pipeline and the second water supplementing pipeline, for controlling the on-off of water supplementing.

8. The heat pump system according to claim 1, wherein: the first use-side terminal is a floor heating coil, and the second use-side terminal is a toilet.

9. The heat pump system of claim 5, wherein, In a refrigeration cycle, in a first use state, the first valve port and the third valve port of the three-way valve are in communication, the water circulation circuit is in communication, the pumping device is in operation, the second throttling element is open, and the outdoor heat exchanger and the water-fluorine heat exchanger both work as condensers; after the second use-side terminal is drained, the first valve port and the second valve port are in communication, the drainage pipeline is in communication, and the second use-side terminal is supplemented with water.

10. The heat pump system of claim 9, wherein After the second use-side terminal is supplemented with water, the first use-side terminal is supplemented with water in linkage, and the water temperature is lowered.

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