Tianfluland water system and control method

Abstract

The invention relates to the technical field of air conditioners, and provides a Tianshu water system and a control method.The system comprises an outdoor unit, an indoor unit and a water module, the outdoor unit comprises a compressor, a condenser and a heat exchanger, the condenser and the heat exchanger are connected, the compressor is connected to the condenser through a control valve set, and the heat exchanger is connected to the control valve set; the indoor unit is connected to the control valve set and connected to a pipeline between the condenser and the heat exchanger. The water module communicates with the water channel of the heat exchanger. According to the Tiansha water system provided by the invention, when the condenser is defrosted, the refrigerant output by the compressor is divided into two paths, one path enters the condenser through the control valve bank to defrost the condenser, and the other path enters the indoor unit to heat the indoor space, so that normal heating of the indoor unit is ensured while the condenser is defrosted, and the working efficiency of the indoor unit is improved. And indoor temperature reduction is avoided, so that the use comfort of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a natural fluorine and ground water system and a control method thereof. Background Art

[0002] After the air conditioning system has been running for a period of time, affected by local temperature, humidity and other factors, a layer of frost will form on the surface of the outdoor unit condenser, affecting the heat exchange effect of the condenser.

[0003] The existing air-conditioning system includes an advanced natural fluorine and ground water system. When the air-conditioning system detects that the outdoor unit has reached the defrost condition, the system enters the defrost mode; in the defrost mode, the condenser is defrosted by switching the system to the cooling mode, and the evaporator evaporates the refrigerant by taking heat from the room.

[0004] However, when the air conditioning system switches to cooling mode for defrosting, it actually extracts heat from the indoor environment, causing the indoor temperature to drop, making it uncomfortable for users. Summary of the invention

[0005] The present invention provides a natural fluorine and ground water system and a control method, which are used to solve the defect of the prior art that the indoor temperature drops during defrosting, and realize the normal heating of the indoor unit while the condenser is defrosted, thereby improving the user comfort.

[0006] The present invention provides a natural fluorine and ground water system, comprising: The outdoor unit comprises a compressor and a connected condenser and a heat exchanger, wherein the compressor is connected to the condenser through a control valve group, and the heat exchanger is connected to the control valve group; An indoor unit, the indoor unit is connected to the control valve group, and the indoor unit is connected to a pipeline between the condenser and the heat exchanger; A water module, the water module being connected to a water channel of the heat exchanger; When the condenser is defrosted, the refrigerant output by the compressor is divided into two paths, one path enters the condenser through the control valve group, and the other path enters the indoor unit through the control valve group. The refrigerant output by the condenser and the refrigerant output by the indoor unit are combined and then flow back to the compressor through the heat exchanger and the control valve group.

[0007] According to a natural fluorine and ground water system provided by the present invention, the control valve group comprises: A main four-way valve, the main four-way valve comprising a first main valve port, a second main valve port and a third main valve port, the first main valve port being connected to the exhaust port of the compressor, the second main valve port being connected to the indoor unit, and the third main valve port being connected to the suction port of the compressor; A secondary four-way valve, the secondary four-way valve includes a first secondary valve port, a second secondary valve port, a third secondary valve port and a fourth secondary valve port, the first secondary valve port is connected to the exhaust port of the compressor, the second secondary valve port is connected to the heat exchanger, the third secondary valve port is connected to the intake port of the compressor, and the fourth secondary valve port is connected to the condenser.

[0008] According to a natural fluorine and ground water system provided by the present invention, the water module comprises a buffer water tank and a floor heating component, the buffer water tank is connected to the water channel of the heat exchanger, the floor heating component is connected to the buffer water tank, and a first fluid driving member is arranged between the floor heating component and the buffer water tank; When the condenser is defrosted, the first fluid driving member is in a closed state.

[0009] According to a natural fluorine and ground water system provided by the present invention, an outdoor expansion valve is provided at one end of the condenser connected to the heat exchanger; when the condenser is defrosted, the outdoor expansion valve is in a fully open state.

[0010] A natural fluorine and ground water system provided according to the present invention further includes a controller, the indoor unit has an indoor expansion valve, and the controller is used to adjust the opening of the indoor expansion valve based on the indoor ambient temperature.

[0011] According to a natural fluorine and ground water system provided by the present invention, a throttle valve is provided in the pipeline between the condenser and the heat exchanger, the indoor unit is connected between the condenser and the throttle valve, and the controller adjusts the opening of the throttle valve based on the evaporation saturation temperature of the system.

[0012] According to a natural fluorine and ground water system provided by the present invention, the condenser is provided with a defrost sensor.

[0013] The present invention also provides a control method for the natural fluorine and ground water system as described in any one of the above, comprising the following steps: Receiving a defrost instruction; Based on the defrost instruction, the natural fluorine and ground water system is controlled to enter the defrost mode. In the defrost mode, the refrigerant output by the compressor is divided into two paths, one path enters the condenser through the control valve group, and the other path enters the indoor unit through the control valve group. After the refrigerant output by the condenser and the refrigerant output by the indoor unit are combined, they are returned to the compressor through the heat exchanger and the control valve group in sequence.

[0014] A control method for a natural fluorine and ground water system provided by the present invention also includes: Get the current indoor ambient temperature; When the current indoor ambient temperature is lower than the indoor ambient temperature before defrosting, the opening degree of the indoor expansion valve is increased.

[0015] A control method for a natural fluorine and ground water system provided by the present invention further includes: when the current indoor ambient temperature is greater than the indoor ambient temperature before defrosting, reducing the opening of the indoor expansion valve.

[0016] The natural fluorine and ground water system and control method provided by the present invention divide the refrigerant output by the compressor into two paths, one path enters the condenser through the control valve group to defrost the condenser, and the other path enters the indoor unit to heat the room. Therefore, while the condenser is defrosted, the indoor unit can be heated normally to avoid the indoor temperature from dropping, thereby improving the user's comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the natural fluorine and ground water system provided by the present invention.

[0019] Figure 2 yes Figure 1 Schematic diagram of the local enlarged structure at A in the figure.

[0020] Figure 3 This is one of the flow charts of the control method of the natural fluorine and ground water system provided by the present invention.

[0021] Figure 4 This is the second flow chart of the control method of the natural fluorine and ground water system provided by the present invention.

[0022] Figure 5 This is the third flow chart of the control method of the natural fluorine and ground water system provided by the present invention.

[0023] Reference numerals: 110, compressor; 120, condenser; 130, heat exchanger; 140, outdoor expansion valve; 150, defrost sensor; 170, gas-liquid separator; 180, economizer; 190, electronic expansion valve; 200, control valve group; 210, main four-way valve; d 1 , the first main valve port; e 1 , the second main valve port; s 1 , the third main valve port; c 1 , the fourth main valve port; 220, auxiliary four-way valve; d 2 , the first auxiliary valve port; e 2 , the second auxiliary valve port; s 2, the third auxiliary valve port; c 2 , the fourth auxiliary valve port; 300, indoor unit; 310, indoor expansion valve; 320, gas pipe stop valve; 400, water module; 410, buffer water tank; 420, floor heating assembly; 430, first connecting pipe; 440, second connecting pipe; 450, first fluid driving member; 460, second fluid driving member; 500. Throttle valve. DETAILED DESCRIPTION

[0024] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0027] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0029] The embodiment of the present invention provides a natural fluorine ground water system, such as Figure 1 As shown, the natural fluorine and ground water system includes an outdoor unit, an indoor unit 300 and a water module 400, and the indoor unit 300 and the water module 400 are both connected to the outdoor unit.

[0030] Specifically, the outdoor unit includes a compressor 110 and a connected condenser 120 and a heat exchanger 130. The compressor 110 is connected to the condenser 120 through a control valve group 200, and the heat exchanger 130 is connected to the control valve group 200; the indoor unit 300 is connected to the control valve group 200, and the indoor unit 300 is connected to the pipeline between the condenser 120 and the heat exchanger 130; the water module 400 is connected to the water channel of the heat exchanger 130.

[0031] When the condenser 120 is defrosted, the refrigerant output by the compressor 110 is divided into two paths, one path enters the condenser 120 through the control valve group 200, and the other path enters the indoor unit 300 through the control valve group 200. The refrigerant output by the condenser 120 and the refrigerant output by the indoor unit 300 are combined and then flow back to the compressor 110 through the heat exchanger 130 and the control valve group 200.

[0032] It can be understood that when the condenser 120 is defrosted, the exhaust port of the compressor 110 outputs high-temperature and high-pressure gaseous refrigerant, a part of the high-temperature and high-pressure gaseous refrigerant enters the indoor unit 300 through the control valve group 200 to heat the indoor room; the other part of the high-temperature and high-pressure gaseous refrigerant enters the condenser 120 through the control valve group 200 to heat and frost the condenser 120 to achieve defrosting of the condenser 120. The frosted condenser 120 outputs liquid refrigerant, which is combined with the refrigerant output by the indoor unit 300 and then enters the heat exchanger 130. After entering the heat exchanger 130, the refrigerant exchanges heat with the water module 400 and then returns to the suction port of the compressor 110 through the control valve group 200.

[0033] It should be noted that if the indoor unit 300 fan is not turned during defrosting, it will still take heat from the room, causing indoor temperature fluctuations and reducing comfort. However, the defrosting process of the condenser 120 in this embodiment takes heat from the compressor 110, not from the indoor unit 300; and while the compressor 110 delivers high-temperature and high-pressure gaseous refrigerant to the condenser 120, it also delivers high-temperature and high-pressure gaseous refrigerant to the indoor unit 300 to ensure that the indoor unit 300 does not stop and can heat normally.

[0034] In the natural fluorine and ground water system provided by the embodiment of the present invention, the refrigerant output by the compressor 110 is divided into two paths. One path enters the condenser 120 through the control valve group 200 to defrost the condenser 120, and the other path enters the indoor unit 300 to heat the room. Therefore, while the condenser 120 is defrosted, the indoor unit 300 is guaranteed to heat normally, avoiding the indoor temperature from dropping, thereby improving the user's comfort.

[0035] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the control valve group 200 includes a main four-way valve 210 and an auxiliary four-way valve 220; the main four-way valve 210 includes a first main valve port d 1 、Second main valve port e 1 and the third main valve port s 1 , the first main valve port d 1 Connected to the exhaust port of the compressor 110, the second main valve port e 1 Connected to the indoor unit 300, the third main valve port s 1 The auxiliary four-way valve 220 includes a first auxiliary valve port d 2 、Second auxiliary valve port e 2 、The third auxiliary valve port 2 And the fourth auxiliary valve port c 2 , the first auxiliary valve port d 2 Connected to the exhaust port of the compressor 110, the second auxiliary valve port e 2 Connected to the heat exchanger 130, the third sub-valve port s 2 Connected to the air intake port of the compressor 110, the fourth sub-valve port c 2 It is connected to the condenser 120. It should be noted that the main four-way valve 210 also has a fourth main valve port c 1 , the fourth main valve port c 1 In normally closed state.

[0036] When the main four-way valve 210 is powered on, the first main valve port d 1 And the second main valve port e 1 When the auxiliary four-way valve 220 is powered on, the first auxiliary valve port d 2 and the second auxiliary valve port e 2When the auxiliary four-way valve 220 loses power, the first auxiliary valve port d 2 And the fourth auxiliary valve port c 2 Connectivity.

[0037] Specifically, the exhaust port of the compressor 110 is connected to an exhaust pipeline, and the exhaust pipeline has two output ports, one of which is connected to the first main valve port d of the main four-way valve 210. 1 The other output port is connected to the first auxiliary valve port d of the auxiliary four-way valve 220. 2 The third main valve port s of the main four-way valve 210 1 and the third auxiliary valve port s of the auxiliary four-way valve 220 2 Both are connected to the air intake port of the compressor 110 .

[0038] Furthermore, the second main valve port e 1 The pipeline between the indoor unit 300 is provided with a gas pipe stop valve 320 .

[0039] In one embodiment of the present invention, Figure 1 As shown, an outdoor expansion valve 140 is provided at one end of the condenser 120 connected to the heat exchanger 130; when the condenser 120 is defrosted, the outdoor expansion valve 140 is in a fully open state.

[0040] It is understandable that the number of the condenser 120 may be one or more, and one end of the condenser 120 is connected to the fourth sub-valve port c 2 , the other end of the condenser 120 is connected to the heat exchanger 130; when there are multiple condensers 120, the multiple condensers 120 are arranged in parallel.

[0041] For example, the number of condensers 120 is two, and one end of the two condensers 120 is connected to the fourth sub-valve port c 2 The other ends of the two condensers 120 are connected to a condensation pipeline after being brought together. An outdoor expansion valve 140 is provided at one end of the condensation pipeline close to the condenser 120, and the other end of the condensation pipeline is connected to the heat exchanger 130 through a pipeline.

[0042] It can be understood that when the condenser 120 is defrosted, the main four-way valve 210 is powered on, the auxiliary four-way valve 220 is powered off, and the outdoor expansion valve 140 is fully opened, so that the high-temperature and high-pressure gaseous refrigerant enters the condenser 120 to heat and defrost the condenser 120. The condensed liquid refrigerant is collected and enters the heat exchanger 130. The gaseous refrigerant after heat exchange returns to the suction port of the compressor 110 through the auxiliary four-way valve 220.

[0043] Furthermore, the condenser 120 is provided with a defrost sensor 150 , and whether the condenser 120 is frosted is detected by the defrost sensor 150 .

[0044] It is understandable that the defrost sensor 150 is used to collect temperature information of the condenser 120 in real time, and generates a defrost instruction based on the temperature information, and sends the defrost instruction to the controller, and the controller controls the working states of valves such as the main four-way valve 210 and the auxiliary four-way valve 220 based on defrosting refrigeration. For example, when the condenser 120 is defrosted, the main four-way valve 210 is powered on, the auxiliary four-way valve 220 is powered off, and the outdoor expansion valve 140 is fully opened.

[0045] In one embodiment of the present invention, the indoor unit 300 has an indoor expansion valve 310, and the controller is used to adjust the opening degree of the indoor expansion valve 310 based on the indoor ambient temperature.

[0046] It can be understood that part of the refrigerant output by the compressor 110 enters the indoor unit 300 for indoor heating. In order to avoid indoor temperature fluctuations, the indoor temperature is obtained in real time, and when the indoor temperature fluctuates, the opening of the indoor expansion valve 310 is adjusted to adjust the indoor temperature, thereby avoiding indoor temperature fluctuations and further improving user comfort.

[0047] Specifically, when a decrease in the indoor ambient temperature is detected, the opening of the indoor expansion valve 310 is increased; when an increase in the indoor ambient temperature is detected, the opening of the indoor expansion valve 310 is reduced; when the indoor ambient temperature remains constant, the opening of the indoor expansion valve 310 remains unchanged.

[0048] It should be noted that the fluctuation of indoor ambient temperature not only affects the user's comfort experience, but also causes additional wear of the internal components of the system, reducing the overall life and reliability of the system. In this embodiment, the indoor ambient temperature is adjusted in real time by the indoor expansion valve 310 to avoid additional wear of the components caused by the indoor ambient temperature fluctuation, thereby improving the overall life and reliability of the system.

[0049] In this embodiment, both the indoor expansion valve 310 and the outdoor expansion valve 140 may be electronic expansion valves.

[0050] In one embodiment of the present invention, a throttle valve 500 is provided in the pipeline between the condenser 120 and the heat exchanger 130, the indoor unit 300 is connected between the condenser 120 and the throttle valve 500, and the controller is used to adjust the opening of the throttle valve 500 based on the evaporation saturation temperature of the pipeline.

[0051] Specifically, the output of the condenser 120 is connected to a first pipeline, the output of the indoor unit 300 is connected to a second pipeline, the first pipeline and the second pipeline are connected to one end of the manifold, the other end of the manifold is connected to the first inlet of the heat exchanger 130, and the first outlet of the heat exchanger 130 is connected to the second auxiliary valve port e. 2The first inlet and the first outlet of the heat exchanger 130 are connected to form a refrigerant channel; a throttle valve 500 is provided on the manifold, and the controller is used to adjust the opening of the throttle valve 500 based on the evaporation saturation temperature of the system to ensure that the refrigerant is completely vaporized.

[0052] In this embodiment, the first pipeline is provided with a saturation temperature sensor, and the saturation temperature sensor is used to detect the evaporation saturation temperature of the system.

[0053] In one embodiment of the present invention, the third main valve port s of the main four-way valve 210 1 and the third auxiliary valve port s of the auxiliary four-way valve 220 2 The third pipeline is connected to the air inlet of the compressor 110; one end of the third pipeline has two connecting ports, which are respectively connected to the third main valve port s 1 And the third auxiliary valve port s 2 The other end of the third pipe is connected to the air intake port of the compressor 110 .

[0054] like Figure 1 As shown, the natural fluorine and ground water system also includes an economizer 180, which has a first channel and a second channel. The first channel of the economizer 180 is connected to the first pipeline, the inlet of the second channel is connected to the outlet of the condenser 120 through the electronic expansion valve 190, and the outlet of the second channel is connected to the third pipeline.

[0055] It can be understood that the refrigerant output by the condenser 120 is divided into two paths, one of which enters the first path of the first economizer 180, and the other enters the second path of the first economizer 180 after being cooled by the electronic expansion valve 190. The refrigerants in the first path and the second path exchange heat. After the heat exchange, the cooled refrigerant in the first path enters the manifold, and the low-temperature gas in the second path returns to the compressor 110, thereby improving the heating efficiency of the system.

[0056] In this embodiment, the other end of the third pipeline is connected to the air intake port of the compressor 110 through the gas-liquid separator 170 .

[0057] Furthermore, a filter is provided between the gas-liquid separator 170 and the air intake of the compressor 110 .

[0058] In one embodiment of the present invention, Figure 1 As shown, the water module 400 includes a buffer water tank 410 and a floor heating component 420 . The buffer water tank 410 is connected to the water channel of the heat exchanger 130 , and the floor heating component 420 is connected to the buffer water tank 410 . A first fluid driving component 450 is arranged between the floor heating component 420 and the buffer water tank 410 .

[0059] It is understandable that the buffer water tank 410 is connected to the water channel of the heat exchanger 130 and the floor heating component 420. When the condenser 120 is defrosted, the refrigerant output by the condenser 120 and the refrigerant output by the indoor unit 300 are collected and enter the refrigerant channel of the heat exchanger 130, and heat is exchanged with the water channel of the heat exchanger 130. The low temperature refrigeration in the refrigerant channel will reduce the water temperature in the water channel, thereby making the water temperature in the buffer water tank 410 lower. If the first fluid driving component 450 is in the working state, the low temperature buffer water tank 410 will make the floor heating component 420 unable to achieve the heat extraction function. Therefore, in this embodiment, when the condenser 120 is defrosted, the first fluid driving component 450 is in a closed state, so that the floor heating component 420 does not extract heat.

[0060] In this embodiment, the heat exchanger 130 further has a second inlet and a second outlet, which are connected to form a water channel; the second inlet and the second outlet are respectively connected to the buffer water tank 410 through the first connecting pipe 430, and the first connecting pipe 430 is provided with a second fluid driving member 460.

[0061] The buffer water tank 410 is connected to the floor heating assembly 420 through a second connecting pipe 440 , and a first fluid driving member 450 is disposed on the second connecting pipe 440 .

[0062] Optionally, the first fluid driving component 450 and the second fluid driving component 460 may both be water pumps.

[0063] Based on the natural fluorine and ground water system provided in any of the above embodiments, an embodiment of the present invention further provides a control method, such as Figure 3 As shown, the control method includes the following steps: Step 10: Receive a defrost instruction.

[0064] Step 20, based on the defrost instruction, control the natural fluorine and ground water system to enter the defrost mode. In the defrost mode, the refrigerant output by the compressor 110 is divided into two paths, one path enters the condenser 120 through the control valve group 200, and the other path enters the indoor unit 300 through the control valve group 200. After the refrigerant output by the condenser 120 and the refrigerant output by the indoor unit 300 are combined, they are returned to the compressor 110 through the heat exchanger 130 and the control valve group 200 in sequence.

[0065] It can be understood that when frost is detected on the condenser 120, a defrost command is issued, the controller receives the defrost command, and controls the natural fluorine and ground water system to enter the defrost mode based on the defrost command, and the exhaust port of the compressor 110 outputs high-temperature and high-pressure gaseous refrigerant, a part of the high-temperature and high-pressure gaseous refrigerant enters the indoor unit 300 through the control valve group 200 to heat the indoor room; the other part of the high-temperature and high-pressure gaseous refrigerant enters the condenser 120 through the control valve group 200, heats and frosts the condenser 120 to achieve defrosting of the condenser 120, and the frosted condenser 120 outputs liquid refrigerant, which is combined with the refrigerant output by the indoor unit 300 and enters the heat exchanger 130. After the refrigerant enters the heat exchanger 130, it exchanges heat with the water module 400 and then returns to the suction port of the compressor 110 through the control valve group 200.

[0066] According to the control method of the natural fluorine and ground water system provided in the embodiment of the present invention, the refrigerant output by the compressor 110 is divided into two paths, one path enters the condenser 120 through the control valve group 200 to defrost the condenser 120, and the other path enters the indoor unit 300 to heat the indoor room. Thus, while the condenser 120 is defrosted, the indoor unit 300 is guaranteed to heat normally, avoiding the indoor temperature from dropping, thereby improving the user's comfort.

[0067] Optionally, when the indoor unit 300 has an indoor expansion valve 310, Figure 4 As shown, the control method also includes the following steps: Step 30: Get the current indoor ambient temperature.

[0068] Step 40: when the current indoor ambient temperature is lower than the indoor ambient temperature before defrosting, increase the opening of the indoor expansion valve 310.

[0069] It is understandable that the current indoor ambient temperature TAO is obtained, and the current indoor ambient temperature TAO is compared with the indoor ambient temperature tao before defrosting. When the current indoor ambient temperature TAO is less than the indoor ambient temperature tao before defrosting, that is, when the indoor ambient temperature decreases, the opening of the indoor expansion valve 310 is gradually increased to increase the indoor ambient temperature until the current indoor ambient temperature TAO is equal to the indoor ambient temperature tao before defrosting. It should be noted here that when the current indoor ambient temperature TAO is equal to the indoor ambient temperature tao before defrosting, the opening of the indoor expansion valve 310 remains unchanged.

[0070] Further, such as Figure 5 As shown, the control method also includes the following steps: Step 50: When the current indoor ambient temperature is greater than the indoor ambient temperature before defrosting, reduce the opening of the indoor expansion valve 310.

[0071] It can be understood that when the current indoor ambient temperature TAO is greater than the indoor ambient temperature tao before defrosting, that is, the indoor ambient temperature increases, the opening of the indoor expansion valve 310 is gradually closed to reduce the indoor ambient temperature until the current indoor ambient temperature TAO is equal to the indoor ambient temperature tao before defrosting.

[0072] In a specific embodiment of the present invention, the control valve group 200 includes a main four-way valve 210 and an auxiliary four-way valve 220, and the control method includes the following contents: When the system heating operation reaches the defrost condition and the system issues a defrost command, the first fluid driving component 450 stops, the second fluid driving component 460 starts, and the main four-way valve 210 is powered on, so that the high-temperature and high-pressure gaseous refrigerant output by the compressor 110 enters the indoor unit 300 to heat the room, and the indoor expansion valve 310 of the indoor unit 300 is adjusted according to the indoor ambient temperature.

[0073] At the same time, the auxiliary four-way valve 220 is powered off, and the outdoor expansion valve 140 is fully opened, so that the high-temperature and high-pressure gaseous refrigerant enters the condenser 120 to heat and defrost the condenser 120. The condensed liquid refrigerant is combined with the liquid refrigerant output by the indoor unit 300 and throttled by the throttle valve 500, and heat is exchanged in the buffer water tank 410, so that the gaseous refrigerant after heat exchange and evaporation passes through the second auxiliary valve port e of the auxiliary four-way valve 220. 2 、The third auxiliary valve port 2 Back to the compressor 110. It should be noted here that the valve opening of the throttle valve 500 is adjusted according to the evaporation saturation temperature of the system to ensure that the refrigerant is completely vaporized. If the low pressure at this time is detected to be less than the set threshold, the electronic expansion valve 190 is opened. The electronic expansion valve 190 is first opened at the minimum allowable opening and gradually increases until the temperature detected by the saturation temperature sensor Tliqc is equal to the high pressure saturation temperature.

[0074] After defrosting, all valves and water pumps are initialized and resume normal operation before defrosting.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A natural fluorine and ground water system, characterized in that: include: The outdoor unit includes a compressor second sensor VT02 and a connected condenser second sensor VT02 and a heat exchanger second sensor VT02, wherein the compressor second sensor VT02 is connected to the condenser second sensor VT02 through a control valve group second sensor VT02, and the heat exchanger second sensor VT02 is connected to the control valve group second sensor VT02; The second indoor unit sensor VT02 is connected to the second control valve group sensor VT02, and the second indoor unit sensor VT02 is connected to the pipeline between the second condenser sensor VT02 and the second heat exchanger sensor VT02; A water module second sensor VT02, wherein the water module second sensor VT02 is connected to a water channel of the heat exchanger second sensor VT02; When the condenser second sensor VT02 is defrosted, the refrigerant output by the compressor second sensor VT02 is divided into two paths, one path enters the condenser second sensor VT02 through the control valve group second sensor VT02, and the other path enters the indoor unit second sensor VT02 through the control valve group second sensor VT02. After the refrigerant output by the condenser second sensor VT02 and the refrigerant output by the indoor unit second sensor VT02 are combined, they flow back to the compressor second sensor VT02 through the heat exchanger second sensor VT02 and the control valve group second sensor VT02.

2. The natural fluorine and ground water system according to claim 1, characterized in that: The second sensor VT02 of the control valve group includes: The main four-way valve second sensor VT02 includes a first main valve port second sensor VT02, a second main valve port second sensor VT02 and a third main valve port second sensor VT02, wherein the first main valve port second sensor VT02 is connected to the exhaust port of the compressor second sensor VT02, the second main valve port second sensor VT02 is connected to the indoor unit second sensor VT02, and the third main valve port second sensor VT02 is connected to the suction port of the compressor second sensor VT02; The auxiliary four-way valve second sensor VT02, the auxiliary four-way valve second sensor VT02 includes a first auxiliary valve port second sensor VT02, a second auxiliary valve port second sensor VT02, a third auxiliary valve port second sensor VT02 and a fourth auxiliary valve port second sensor VT02, the first auxiliary valve port second sensor VT02 is connected to the exhaust port of the compressor second sensor VT02, the second auxiliary valve port second sensor VT02 is connected to the heat exchanger second sensor VT02, the third auxiliary valve port second sensor VT02 is connected to the intake port of the compressor second sensor VT02, and the fourth auxiliary valve port second sensor VT02 is connected to the condenser second sensor VT02.

3. The natural fluorine and ground water system according to claim 1, characterized in that: The second sensor VT02 of the water module includes a second sensor VT02 of a buffer water tank and a second sensor VT02 of a floor heating component. The second sensor VT02 of the buffer water tank is connected to the water channel of the second sensor VT02 of the heat exchanger. The second sensor VT02 of the floor heating component is connected to the second sensor VT02 of the buffer water tank. A second sensor VT02 of a first fluid driving member is provided between the second sensor VT02 of the floor heating component and the second sensor VT02 of the buffer water tank. When the condenser second sensor VT02 is defrosted, the first fluid driving member second sensor VT02 is in a closed state.

4. The natural fluorine and ground water system according to claim 1, characterized in that: An outdoor expansion valve second sensor VT02 is provided at one end of the condenser second sensor VT02 connected to the heat exchanger second sensor VT02; when the condenser second sensor VT02 is defrosted, the outdoor expansion valve second sensor VT02 is in a fully open state.

5. The natural fluorine and ground water system according to claims 1 to 4, characterized in that: It also includes a controller, wherein the indoor unit second sensor VT02 has an indoor expansion valve second sensor VT02, and the controller is used to adjust the opening degree of the indoor expansion valve second sensor VT02 based on the indoor ambient temperature.

6. The natural fluorine and ground water system according to claim 5, characterized in that: The pipeline between the condenser second sensor VT02 and the heat exchanger second sensor VT02 is provided with a throttle valve second sensor VT02, the indoor unit second sensor VT02 is connected between the condenser second sensor VT02 and the throttle valve second sensor VT02, and the controller adjusts the opening of the throttle valve second sensor VT02 based on the system's evaporation saturation temperature.

7. The natural fluorine and ground water system according to any one of claims 1 to 4, characterized in that: The condenser second sensor VT02 is provided with a defrost sensor second sensor VT02.

8. A method for controlling a natural fluorine and ground water system according to any one of claims 1 to 7, characterized in that: include: Receiving a defrost instruction; Based on the defrost instruction, the natural fluorine and ground water system is controlled to enter the defrost mode. In the defrost mode, the refrigerant output by the second sensor VT02 of the compressor is divided into two paths, one path enters the second sensor VT02 of the condenser through the second sensor VT02 of the control valve group, and the other path enters the second sensor VT02 of the indoor unit through the second sensor VT02 of the control valve group. After the refrigerant output by the second sensor VT02 of the condenser and the refrigerant output by the second sensor VT02 of the indoor unit are combined, they flow back to the second sensor VT02 of the compressor through the second sensor VT02 of the heat exchanger and the second sensor VT02 of the control valve group in turn.

9. The control method of the natural fluorine and ground water system according to claim 8, characterized in that: Also includes: Get the current indoor ambient temperature; When the current indoor ambient temperature is lower than the indoor ambient temperature before defrosting, the opening degree of the second sensor VT02 of the indoor expansion valve is increased.

10. The control method of the natural fluorine and ground water system according to claim 9, characterized in that: Also includes: When the current indoor ambient temperature is greater than the indoor ambient temperature before defrosting, the opening degree of the second sensor VT02 of the indoor expansion valve is reduced.

Images