Air conditioner, water heater and refrigerated cabinet combined control system

Abstract

The invention discloses an air conditioner, water heater and refrigerated cabinet combined control system which comprises an indoor heat exchanger, a water heater, a refrigerated cabinet, a compressor, a first valve system, a second valve system, a first heat exchanger and a second heat exchanger. The compressor, a refrigerant pipeline of the first heat exchanger and a refrigerant pipeline of the second heat exchanger are sequentially connected to form a refrigerant circulating system, the water heater is communicated with a circulating water pipeline of the first heat exchanger, and the refrigerated cabinet is communicated with a circulating water pipeline of the second heat exchanger; a water inlet and a water outlet of the indoor heat exchanger are respectively connected with the first valve system and the second valve system; the first valve system and the second valve system are used for controlling a circulating water pipeline of the first heat exchanger to communicate with the indoor heat exchanger when the indoor heat exchanger is in a first mode; and when the indoor heat exchanger is in the second mode, a circulating water pipeline of the second heat exchanger is controlled to communicate with the indoor heat exchanger.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning control, and in particular to an air conditioning, water heater and refrigerator combined control system. Background Art

[0002] In the prior art, air conditioners, water heaters, and refrigerators mostly work independently. On the one hand, refrigerators and air conditioners in cooling mode will directly discharge heat to the outdoor environment, and on the other hand, water heaters and air conditioners in heating mode need to consume electricity to heat. Therefore, existing home appliances consume more electricity when working, and the energy utilization rate is low. Summary of the invention

[0003] To this end, this application discloses the following technical solutions:

[0004] The present application provides an air conditioner, water heater, and refrigerator joint control system, comprising:

[0005] Indoor heat exchanger, water heater, refrigerator, compressor, first valve system, second valve system, first heat exchanger and second heat exchanger;

[0006] The refrigerant pipeline of the first heat exchanger is connected to the outlet of the compressor, the refrigerant pipeline of the first heat exchanger and the refrigerant pipeline of the second heat exchanger are connected in series, and the refrigerant pipeline of the second heat exchanger is connected to the inlet of the compressor;

[0007] The water heater is connected to the circulating water pipeline of the first heat exchanger, and the refrigerator is connected to the circulating water pipeline of the second heat exchanger;

[0008] The water inlet of the indoor heat exchanger is connected to the water outlet of the circulating water pipeline of the first heat exchanger and the water outlet of the circulating water pipeline of the second heat exchanger through the first valve system;

[0009] The water outlet of the indoor heat exchanger is connected to the water inlet of the circulating water pipeline of the first heat exchanger and the water inlet of the circulating water pipeline of the second heat exchanger through the second valve system;

[0010] The first valve system and the second valve system are used for:

[0011] When the indoor heat exchanger is in the first mode, controlling the circulating water pipeline of the first heat exchanger to be connected to the indoor heat exchanger;

[0012] When the indoor heat exchanger is in the second mode, the circulating water pipeline of the second heat exchanger is controlled to be connected to the indoor heat exchanger.

[0013] Optionally, the first valve system includes a first water-side proportional three-way valve, a second water-side proportional three-way valve and a first switch three-way valve;

[0014] The second valve system includes a second on-off three-way valve, a first check valve and a second check valve;

[0015] The first water-side proportional three-way valve connects the first heat exchanger, the first switch three-way valve and the water heater;

[0016] The second water-side proportional three-way valve is connected to the second heat exchanger, the first switch three-way valve and the refrigerator;

[0017] The first switch three-way valve is connected to the first water-side proportional three-way valve, the second water-side proportional three-way valve and the water inlet of the indoor heat exchanger;

[0018] The second on-off three-way valve is connected to the water outlet of the indoor heat exchanger, the first check valve and the second check valve;

[0019] The first check valve connects the second on-off three-way valve and the first heat exchanger;

[0020] The second check valve connects the second on-off three-way valve and the second heat exchanger.

[0021] Optionally, a third heat exchanger is also included;

[0022] The third heat exchanger is used to exchange heat between the refrigerant and the outdoor environment, and the refrigerant circulation pipeline of the third heat exchanger is connected to the outlet of the compressor.

[0023] Optionally, it also includes a proportional three-way valve on the first refrigerant side;

[0024] The first refrigerant-side proportional three-way valve connects the outlet of the compressor, the refrigerant circulation pipeline of the first heat exchanger, and the refrigerant circulation pipeline of the third heat exchanger.

[0025] Optionally, further comprising a fourth heat exchanger;

[0026] The fourth heat exchanger is used to exchange heat between the refrigerant and the outdoor environment, and the refrigerant circulation pipeline of the fourth heat exchanger is connected to the inlet of the compressor.

[0027] Optionally, it also includes a proportional three-way valve on the second refrigerant side;

[0028] The second refrigerant-side proportional three-way valve connects the refrigerant circulation pipeline of the first heat exchanger, the refrigerant circulation pipeline of the second heat exchanger, and the refrigerant circulation pipeline of the fourth heat exchanger.

[0029] Optionally, it also includes a second buffer water tank and a first buffer water tank;

[0030] The second buffer water tank is connected between the valve system and the circulating water pipeline of the first heat exchanger;

[0031] The first buffer water tank is connected between the valve system and the circulating water pipeline of the second heat exchanger.

[0032] Optionally, a water purification module is also included;

[0033] The water purification module is connected between the valve system and the water heater.

[0034] Optionally, it also includes a third check valve, a fourth check valve and a fifth check valve;

[0035] The third check valve is arranged at the water outlet of the refrigerator;

[0036] The fourth check valve is arranged at the water outlet of the indoor heat exchanger;

[0037] The fifth check valve is arranged at the water outlet of the water heater.

[0038] Optionally, it also includes a water supply valve, a first water mixing valve and a second water mixing valve;

[0039] The water supply valve is arranged at the water inlet of the refrigerator;

[0040] The first water mixing valve is arranged at the water inlet of the indoor heat exchanger;

[0041] The second water mixing valve is arranged at another water inlet of the water heater.

[0042] The beneficial effect of the present application is that, depending on the mode of the indoor heat exchanger, the system of the present solution can provide the heat discharged by the refrigerator to the indoor heat exchanger and the water heater, or provide the heat discharged by the refrigerator and the indoor heat exchanger to the water heater. Thus, the present solution can improve the energy utilization rate of household appliances to a certain extent and reduce the power consumption of household appliances that require heating, such as water heaters and indoor heat exchangers. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0044] Figure 1 It is a structural schematic diagram of an air conditioner, water heater and refrigerator joint control system provided in an embodiment of the present application;

[0045] Figure 2It is a structural schematic diagram of another air-conditioner, water heater and refrigerator joint control system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] First, the numbers of various components that may be involved in the system of the present application are explained.

[0048] Compressor 101, third heat exchanger 102, first heat exchanger 103, electronic expansion valve 104, fourth heat exchanger 105, second heat exchanger 106, first buffer water tank 201, first circulating water pump 202, refrigerator 203, second circulating water pump 204, indoor heat exchanger 205, third circulating water pump 206, water purification module 207, water heater 208, second buffer water tank 209, second refrigerant side proportional three-way valve 301, first refrigerant side proportional three-way valve 302, second water side proportional three-way valve 401, water supply valve 402, third check valve 403, first switch three-way valve 404, first mixing valve 405, fourth check valve 406, first water side proportional three-way valve 407, second mixing valve 408, fifth check valve 409, second check valve 410, second switch three-way valve 411, first check valve 412.

[0049] This application embodiment provides a combined control system of an air conditioner, water heater 208 and refrigerator 203. Figure 1 , which is a schematic diagram of the structure and working principle of the system.

[0050] Figure 1 In the figure, the linear arrows indicate the flow direction of the fluid in the corresponding pipeline, the white triangular arrows indicate the flow direction of the circulating water when the indoor heat exchanger 205 is in the second mode, that is, in the cooling mode, and the black triangular arrows indicate the flow direction of the circulating water when the indoor heat exchanger 205 is in the first mode, that is, in the heating mode.

[0051] like Figure 1 As shown, the system of this embodiment may include an indoor heat exchanger 205, a water heater 208, a refrigerator 203, a compressor 101, a first valve system, a second valve system, a first heat exchanger 103 and a second heat exchanger 106;

[0052] The refrigerant pipeline of the first heat exchanger 103 is connected to the outlet of the compressor 101, the refrigerant pipeline of the first heat exchanger 103 and the refrigerant pipeline of the second heat exchanger 106 are connected in series, and the refrigerant pipeline of the second heat exchanger 106 is connected to the inlet of the compressor 101;

[0053] The water heater 208 is connected to the circulating water pipeline of the first heat exchanger 103, and the cold storage cabinet 203 is connected to the circulating water pipeline of the second heat exchanger 106;

[0054] The water inlet of the indoor heat exchanger 205 is connected to the water outlet of the circulating water pipeline of the first heat exchanger 103 and the water outlet of the circulating water pipeline of the second heat exchanger 106 through the first valve system;

[0055] The water outlet of the indoor heat exchanger 205 is connected to the water inlet of the circulating water pipeline of the first heat exchanger 103 and the water inlet of the circulating water pipeline of the second heat exchanger 106 through the second valve system;

[0056] The first valve system and the second valve system are used for:

[0057] When the indoor heat exchanger 205 is in the first mode, the circulating water pipeline of the first heat exchanger 103 is controlled to be connected to the indoor heat exchanger 205;

[0058] When the indoor heat exchanger 205 is in the second mode, the circulating water pipeline of the second heat exchanger 106 is controlled to be connected to the indoor heat exchanger 205 .

[0059] The indoor heat exchanger 205 may include but is not limited to fan coil units, floor heating and other heat exchangers. The first heat exchanger 103 and the second heat exchanger 106 may be plate heat exchangers or other heat exchangers with refrigerant pipelines and circulating water pipelines.

[0060] The first valve system and the second valve system may both be composed of one or more valves with different functions.

[0061] As an example, see Figure 1 , the first valve system may include a first water side proportional three-way valve 407 , a second water side proportional three-way valve 401 and a first switch three-way valve 404 ;

[0062] The first water-side proportional three-way valve 407 connects the first heat exchanger 103, the first switch three-way valve 404 and the water heater 208;

[0063] The second water-side proportional three-way valve 401 connects the second heat exchanger 106, the first switch three-way valve 404 and the refrigerator 203;

[0064] The first switch three-way valve 404 connects the first water-side proportional three-way valve 407, the second water-side proportional three-way valve 401 and the water inlet of the indoor heat exchanger 205;

[0065] As an example, see Figure 1 , the second valve system may include a second switch three-way valve 411 , a first check valve 412 and a second check valve 410 ;

[0066] The second on-off three-way valve 411 connects the water outlet of the indoor heat exchanger 205, the first check valve 412 and the second check valve 410;

[0067] The first check valve 412 connects the second on / off three-way valve 411 and the first heat exchanger 103;

[0068] The second check valve 410 connects the second on-off three-way valve 411 and the second heat exchanger 106 .

[0069] The structures of the first valve system and the second valve system are not limited to the above examples. For example, in some embodiments, the first valve system may also only include the first switch three-way valve 404, and the three ports of the first switch three-way valve 404 are respectively connected to the water inlet of the indoor heat exchanger 205, the first heat exchanger 103 and the second heat exchanger 106, which are used to control the circulating water discharged from the first heat exchanger 103 or the second heat exchanger 106 to enter the indoor heat exchanger 205; the second valve system may only include the second switch three-way valve 411, and the three ports of the second switch three-way valve 411 are respectively connected to the water outlet of the indoor heat exchanger 205, the first heat exchanger 103 and the second heat exchanger 106, which are used to control the circulating water discharged from the indoor heat exchanger 205 to enter the first heat exchanger 103 or the second heat exchanger 106.

[0070] Combine the following Figure 1 The operating principle of the system of this embodiment is described.

[0071] The high-temperature and high-pressure refrigerant output by the compressor 101 after compression first enters the first heat exchanger 103 for heat exchange. At this time, the high-temperature and high-pressure refrigerant can heat the circulating water in the circulating water pipeline of the first heat exchanger 103, so that the first heat exchanger 103 discharges high-temperature circulating water;

[0072] After heat exchange in the first heat exchanger 103, the low-temperature refrigerant enters the second heat exchanger 106 along the pipeline, exchanges heat with the circulation number in the circulating water pipeline of the second heat exchanger 106 in the second heat exchanger 106, absorbs the heat of the circulating water in the second heat exchanger 106, and makes the second heat exchanger 106 discharge low-temperature circulating water;

[0073] Finally, the refrigerant with a higher temperature discharged from the second heat exchanger 106 flows back to the compressor 101, completing the refrigerant circulation.

[0074] In some optional embodiments, an electronic expansion valve 104 (such as Figure 2As shown), the low-temperature refrigerant discharged from the first heat exchanger 103 is throttled and reduced in pressure by the electronic expansion valve 104 to become a low-temperature and low-pressure refrigerant, and then enters the second heat exchanger 106 for heat exchange.

[0075] In this embodiment, the indoor heat exchanger 205 can operate in a first mode, which can also be called a heating mode. In the heating mode, the indoor heat exchanger 205 can use the input circulating water to heat the air, thereby achieving the effect of heating the indoor environment where the indoor heat exchanger 205 is located.

[0076] When the indoor heat exchanger 205 is in the first mode, the first end (the end connected to the first heat exchanger 103) and the third end (the end connected to the indoor heat exchanger 205) of the first switch three-way valve 404 are connected, and the second end (the end connected to the second heat exchanger 106) and the third end of the first switch three-way valve 404 are closed;

[0077] The first end (the end connected to the first heat exchanger 103) and the third end (the end connected to the indoor heat exchanger 205) of the second switch three-way valve 411 are connected, and the second end (the end connected to the second heat exchanger 106) and the third end of the second switch three-way valve 411 are closed;

[0078] Based on the states of the first switch three-way valve 404 and the second switch three-way valve 411, the high-temperature circulating water discharged from the first heat exchanger 103 can enter the water heater 208 and the indoor heat exchanger 205 respectively. On the one hand, the water heater 208 can use the high-temperature circulating water to heat the bathing water of the water heater 208, or discharge the high-temperature circulating water as bathing water. On the other hand, the indoor heat exchanger 205 can use the incoming high-temperature circulating water to heat the air so as to heat the indoor environment.

[0079] At the same time, the low-temperature circulating water discharged from the second heat exchanger 106 can only flow into the circulating water pipeline of the refrigerator 203, absorb the heat in the storage room of the refrigerator 203 in the circulating water pipeline, and then be discharged from the refrigerator 203, flow back to the circulating water pipeline of the second heat exchanger 106, and transfer the absorbed heat to the refrigerant of the second heat exchanger 106.

[0080] In this embodiment, the indoor heat exchanger 205 can also operate in the second mode, which can also be called the cooling mode. In the cooling mode, the indoor heat exchanger 205 can use the input circulating water to absorb the heat of the indoor air, thereby achieving the effect of lowering the indoor ambient temperature of the indoor heat exchanger 205.

[0081] When the indoor heat exchanger 205 is in the second mode, the first end and the third end of the first switch three-way valve 404 are closed, and the second end and the third end of the first switch three-way valve 404 are opened;

[0082] The first end and the third end of the second switch three-way valve 411 are closed and cut off, and the second end and the third end of the second switch three-way valve 411 are opened and conducted;

[0083] Based on the states of the first switch three-way valve 404 and the second switch three-way valve 411, the high-temperature circulating water discharged from the first heat exchanger 103 only enters the water heater 208, so that the water heater 208 can use the high-temperature circulating water to heat the bathing water of the water heater 208, or discharge the high-temperature circulating water as bathing water.

[0084] At the same time, the low-temperature circulating water discharged from the second heat exchanger 106 can flow into the circulating water pipelines of the refrigerator 203 and the indoor heat exchanger 205. On the one hand, the low-temperature circulating water can absorb the heat in the storage room of the refrigerator 203 in the circulating water pipeline, and then be discharged from the refrigerator 203 and flow back to the circulating water pipeline of the second heat exchanger 106. On the other hand, the low-temperature circulating water can absorb the heat of the air in the indoor environment in the indoor heat exchanger 205, and then be discharged from the indoor heat exchanger 205 and flow back to the circulating water pipeline of the second heat exchanger 106. Therefore, the low-temperature circulating water can transfer the heat in the storage room of the refrigerator 203 and the heat of the indoor environment where the indoor heat exchanger 205 is located to the refrigerant of the second heat exchanger 106.

[0085] Whether the indoor heat exchanger 205 works in the first mode or the second mode can be determined according to a control instruction of the user, or the outdoor temperature of the area where the indoor heat exchanger 205 is located can be detected, and the indoor heat exchanger 205 can work in the first mode or the second mode based on the outdoor temperature. For example, if the outdoor temperature is too low (lower than a certain threshold), the indoor heat exchanger 205 can work in the first mode, and if the outdoor temperature is too high (higher than a certain threshold), the indoor heat exchanger 205 can work in the second mode.

[0086] When the indoor heat exchanger 205 is operating in the first mode, the first water-side proportional three-way valve 407 can divert the high-temperature circulating water discharged from the first heat exchanger 103, and control the ratio of the circulating water entering the water heater 208 and the circulating water entering the indoor heat exchanger 205 based on the heating requirements of the water heater 208 and the indoor heat exchanger 205. For example, when the user is not using the water heater 208 or the target temperature that the indoor heat exchanger 205 needs to reach is high, more high-temperature circulating water is controlled to enter the indoor heat exchanger 205, and a small amount of high-temperature circulating water enters the water heater 208. When the user is using the water heater 208 or the target temperature that the indoor heat exchanger 205 needs to reach is low, a small amount of high-temperature circulating water is controlled to enter the indoor heat exchanger 205, and a large amount of high-temperature circulating water enters the water heater 208.

[0087] When the indoor heat exchanger 205 is operating in the second mode, the second water-side proportional three-way valve 401 can divert the low-temperature circulating water discharged from the second heat exchanger 106, and control the ratio of the circulating water entering the refrigerator 203 and the circulating water entering the indoor heat exchanger 205 based on the cooling requirements of the refrigerator 203 and the indoor heat exchanger 205. For example, when the target temperature of the refrigerator 203 to be cooled is low and / or the temperature of the indoor heat exchanger 205 to be cooled is high, more low-temperature circulating water is controlled to enter the refrigerator 203, and a small amount of low-temperature circulating water enters the indoor heat exchanger 205. When the target temperature of the refrigerator 203 to be cooled is high and / or the temperature of the indoor heat exchanger 205 to be cooled is low, more low-temperature circulating water is controlled to enter the indoor heat exchanger 205, and a small amount of high-temperature circulating water enters the refrigerator 203.

[0088] The first check valve 412 and the second check valve 410 can prevent the circulating water from flowing into the indoor heat exchanger 205 and affecting the system performance when the indoor heat exchanger 205 is not started and the refrigerator 203 or the water heater 208 is started.

[0089] Optionally, the refrigerator 203 may use an air-cooled heat exchanger to achieve refrigeration, and utilize the forced convection effect to increase the heat exchange coefficient between the circulating cold water and the environment inside the refrigerator 203 .

[0090] Optionally, the water heater 208 may include an internal stop valve. When the water temperature in the internal water tank is too low, the stop valve is opened to discharge the internal circulating water to the first heat exchanger 103 , thereby absorbing the heat of the refrigerant in the first heat exchanger 103 .

[0091] The beneficial effect of the present application is that, depending on the mode of the indoor heat exchanger 205, the system of the present solution can provide the heat discharged by the refrigerator 203 to the indoor heat exchanger 205 and the water heater 208 for use, or provide the heat discharged by the refrigerator 203 and the indoor heat exchanger 205 to the water heater 208 for use. Thus, the present solution can improve the energy utilization rate of household appliances to a certain extent, and reduce the power consumption of household appliances that require heating, such as the water heater 208 and the indoor heat exchanger 205.

[0092] First, the water air conditioner (i.e., the indoor heat exchanger 205) is used as the driving core of the entire system. The system has a low refrigerant charge, is environmentally friendly, safe and reliable, has strong replaceability of the outdoor unit, and can be used in parallel with the outdoor unit.

[0093] Second, the heat in each link is effectively utilized, the energy utilization rate is high, and energy saving is achieved;

[0094] Third, whether the indoor heat exchanger 205 works in heating mode or cooling mode does not affect the preparation of hot water and the use of the refrigerator 203, and the system is efficient and flexible;

[0095] Fourth, the indoor heat exchanger 205 can be expanded and used in parallel, and the system has strong changeability and scalability.

[0096] See also Figure 2 , which is a schematic diagram of the structure and working principle of a system provided in another embodiment of the present application.

[0097] Figure 2 In the figure, the linear arrows indicate the flow direction of the fluid in the corresponding pipeline, the white triangular arrows indicate the flow direction of the circulating water when the indoor heat exchanger 205 is in the second mode, that is, in the cooling mode, and the black triangular arrows indicate the flow direction of the circulating water when the indoor heat exchanger 205 is in the first mode, that is, in the heating mode.

[0098] In some optional embodiments, the system of this embodiment may further include a third heat exchanger 102;

[0099] The third heat exchanger 102 is used to exchange heat between the refrigerant and the outdoor environment, and the refrigerant circulation pipeline of the third heat exchanger 102 is connected to the outlet of the compressor 101.

[0100] like Figure 2 As shown, when including the third heat exchanger 102, the refrigerant discharged from the compressor 101 can be divided into two paths, one path enters the first heat exchanger 103 for heat exchange with the circulating water in the first heat exchanger 103, and the other path enters the third heat exchanger 102 for heat exchange with the outdoor environment where the third heat exchanger 102 is located. Then, the two low-temperature refrigerants discharged from the first heat exchanger 103 and the third heat exchanger 102 are mixed and enter the second heat exchanger 106 through the electronic expansion valve 104.

[0101] The third heat exchanger 102 may be an air-cooled heat exchanger or other heat exchangers suitable for heat exchange in an outdoor environment.

[0102] Optionally, under the premise of including the third heat exchanger 102, it may also include Figure 2 The first refrigerant side proportional three-way valve 302 is shown; Figure 2 As shown, the first refrigerant side proportional three-way valve 302 connects the outlet of the compressor 101 , the refrigerant circulation pipeline of the first heat exchanger 103 , and the refrigerant circulation pipeline of the third heat exchanger 102 .

[0103] The refrigerant discharged from the compressor 101 can be diverted by the first refrigerant side proportional three-way valve 302 and enter the first heat exchanger 103 and the third heat exchanger 102 respectively. The first refrigerant side proportional three-way valve 302 can adjust the ratio of the refrigerant entering the first heat exchanger 103 and the third heat exchanger 102 according to the heating demand of the water heater 208 and the indoor heat exchanger 205 in the first mode.

[0104] For example, when the water heater 208 and the indoor heat exchanger 205 in the first mode require more heat (for example, heating to a higher temperature is required), more high-temperature and high-pressure refrigerant can be controlled to enter the first heat exchanger 103, and a small amount of high-temperature and high-pressure refrigerant can enter the third heat exchanger 102. When the water heater 208 and the indoor heat exchanger 205 in the first mode require less heat (for example, no heating is required or only heating to a lower temperature is required), a small amount of high-temperature and high-pressure refrigerant can be controlled to enter the first heat exchanger 103, and more high-temperature and high-pressure refrigerant can enter the third heat exchanger 102.

[0105] In some optional embodiments, the system of this embodiment may further include a fourth heat exchanger 104;

[0106] The fourth heat exchanger 104 is used to exchange heat between the refrigerant and the outdoor environment. The refrigerant circulation pipeline of the fourth heat exchanger 104 is connected to the inlet of the compressor 101.

[0107] like Figure 2 As shown, in the case where the fourth heat exchanger 104 is included, the refrigerant flowing out of the electronic expansion valve 104 can be divided into two paths, one path enters the second heat exchanger 106 for heat exchange with the circulating water in the second heat exchanger 106, and the other path enters the fourth heat exchanger 104 for heat exchange with the outdoor environment where the fourth heat exchanger 104 is located, and then the two paths of high-temperature refrigerants discharged from the second heat exchanger 106 and the fourth heat exchanger 104 are mixed and flow back to the compressor 101.

[0108] The fourth heat exchanger 104 may be an air-cooled heat exchanger or other heat exchangers suitable for heat exchange in an outdoor environment.

[0109] Optional, such as Figure 2 As shown, under the premise of including the fourth heat exchanger 104 , the system of this embodiment may further include a second refrigerant side proportional three-way valve 301 .

[0110] The second refrigerant-side proportional three-way valve 301 connects the refrigerant circulation pipeline of the first heat exchanger 103 , the refrigerant circulation pipeline of the second heat exchanger 106 , and the refrigerant circulation pipeline of the fourth heat exchanger 104 .

[0111] The refrigerant flowing through the electronic expansion valve 104 can be diverted by the second refrigerant side proportional three-way valve 301 and enter the second heat exchanger 106 and the fourth heat exchanger 104 respectively. The second refrigerant side proportional three-way valve 301 can adjust the refrigerant ratio entering the second heat exchanger 106 and the fourth heat exchanger 104 according to the cooling demand of the refrigerator 203 and the indoor heat exchanger 205 in the second mode.

[0112] For example, when the cooling demand of the refrigerator 203 and the indoor heat exchanger 205 in the second mode is strong, for example, when the storage room and the indoor environment need to be cooled to a lower temperature, more low-temperature and low-pressure refrigerant can be controlled to enter the second heat exchanger 106, and a small amount of low-temperature and low-pressure refrigerant can be controlled to enter the fourth heat exchanger 104. When the cooling demand of the refrigerator 203 and the indoor heat exchanger 205 in the second mode is weak, for example, when the storage room and the indoor environment need to be cooled to a higher temperature, a small amount of low-temperature and low-pressure refrigerant can be controlled to enter the second heat exchanger 106, and more low-temperature and low-pressure refrigerant can be controlled to enter the fourth heat exchanger 104.

[0113] By setting the third heat exchanger 102 and the fourth heat exchanger 104, and the corresponding first refrigerant side proportional three-way valve 302 and second refrigerant side proportional three-way valve 301, the refrigerant entering the heat exchanger can be controlled in linkage according to the cooling demand and heating demand of the indoor heat exchanger 205, the refrigerator 203 and the water heater 208, so as to prevent liquid hammer and compressor overheating caused by mismatch of the system's cooling and heating demands.

[0114] The third heat exchanger 102 and the fourth heat exchanger 104 may be regarded as an outdoor unit of an air conditioner.

[0115] Through the proportional three-way valves on the refrigerant side and the water side in multiple places in the system, the system of this embodiment can dynamically adjust the water system circulation according to the load of the indoor heat exchanger 205, the refrigerator 203 and the water heater 208, so as to effectively adapt to the needs of different working conditions.

[0116] In some optional embodiments, such as Figure 2 As shown, the system of this embodiment may further include a second buffer water tank 209 and a first buffer water tank 201;

[0117] The second buffer water tank 209 is connected between the valve system and the circulating water pipeline of the first heat exchanger 103;

[0118] The first buffer water tank 201 is connected between the valve system and the circulating water pipeline of the second heat exchanger 106 .

[0119] The first buffer water tank 201 and the second buffer water tank 209 can store circulating water when the circulating water discharged from the connected heat exchanger is excessive, and replenish circulating water to the circulating water pipeline when the discharged circulating water is insufficient, and can store or discharge circulating water according to the strength of the water pressure in the circulating water pipeline to stabilize the water pressure of the circulating water in the pipeline.

[0120] In some optional embodiments, the system of this embodiment may further include a water purification module 207; the water purification module 207 is connected between the valve system and the water heater 208, and is used to filter, purify, and soften the circulating water discharged from the first heat exchanger 103 and about to enter the water heater 208, so as to avoid excessive impurities in the circulating water and affect the normal operation of the water heater 208.

[0121] In some optional embodiments, such as Figure 2 As shown, the system of this embodiment further includes a third check valve 403, a fourth check valve 406 and a fifth check valve 409;

[0122] The third check valve 403 is disposed at the water outlet of the refrigerator 203;

[0123] The fourth check valve 406 is disposed at the water outlet of the indoor heat exchanger 205;

[0124] The fifth check valve 409 is disposed at the water outlet of the water heater 208 .

[0125] The fourth check valve 406 is used to cooperate with the first check valve 412 and the second check valve 410 to further prevent the circulating water from flowing into the indoor heat exchanger 205 when the indoor heat exchanger 205 is not started but the refrigerator 203 or the water heater 208 is started.

[0126] The third check valve 403 is used to prevent the circulating water discharged from the indoor heat exchanger 205 from entering the refrigerating cabinet 203 when the indoor heat exchanger 205 works in the cooling mode and the refrigerating cabinet 203 is not started.

[0127] The fifth check valve 409 is used to prevent the circulating water discharged from the indoor heat exchanger 205 from entering the water heater 208 when the indoor heat exchanger 205 works in the heating mode and the water heater 208 is not started.

[0128] Optionally, the system of this embodiment further includes a water supply valve 402, a first water mixing valve 405 and a second water mixing valve 408;

[0129] The water supply valve 402 is arranged at the water inlet of the refrigerator 203;

[0130] The first water mixing valve 405 is disposed at the water inlet of the indoor heat exchanger 205;

[0131] The second mixing valve 408 is disposed at another water inlet of the water heater 208 .

[0132] The water supply valve 402 can be connected to a normal temperature water pipeline, and according to the refrigeration demand of the refrigerator 203 , the circulating water entering the refrigerator 203 is mixed with the normal temperature water, thereby adjusting the temperature and flow of the circulating water entering the refrigerator 203 .

[0133] The first mixing valve 405 is used for the water mixing and water replenishment process of the water heater 208. The first mixing valve 405 can be connected to the normal temperature water pipeline. According to the heating demand of the water heater 208, the circulating water entering the water heater 208 and the normal temperature water are mixed, thereby adjusting the temperature and flow of the circulating water entering the water heater 208.

[0134] Furthermore, the first water mixing valve 405 can be used to directly discharge domestic hot water from the water heater 208 .

[0135] The second mixing valve 408 is used for the water mixing and water replenishment process of the indoor heat exchanger 205. The first mixing valve 405 can be connected to the normal temperature water pipeline. According to the heating or cooling of the indoor heat exchanger 205, the circulating water entering the indoor heat exchanger 205 is mixed with the normal temperature water, thereby adjusting the temperature and flow rate of the circulating water entering the indoor heat exchanger 205.

[0136] In some optional embodiments, the system of this embodiment may further include a first circulating water pump 202 , a second circulating water pump 204 and a third circulating water pump 206 .

[0137] The first circulating water pump 202 is located at the water inlet of the refrigerator 203 and is used to pressurize and pump the low-temperature circulating water discharged from the second heat exchanger 106 into the refrigerator 203;

[0138] The second circulating water pump 204 is located at the water inlet of the indoor heat exchanger 205, and is used to pressurize and pump the circulating water flowing out of the first switch three-way valve 404 into the indoor heat exchanger 205;

[0139] The third circulating water pump 206 is located at the water inlet of the water heater 208 and is used to pressurize and pump the high-temperature circulating water discharged from the first heat exchanger 103 into the water heater 208 .

[0140] Among them, the switching state of the first circulating water pump 202 can be consistent with the switching state of the refrigerator 203, that is, the first circulating water pump 202 is started when the refrigerator 203 is started, and the first circulating water pump 202 is turned off when the refrigerator 203 is turned off; similarly, the switching state of the second circulating water pump 204 can be consistent with the switching state of the indoor heat exchanger 205, and the switching state of the third circulating water pump 206 can be consistent with the switching state of the water heater 208.

[0141] It should be noted that, when a device mentioned in any embodiment of the present application transfers refrigerant or water to another device, it means that the refrigerant or water flows out from one end of the corresponding pipeline of the previous device, and then flows into one end of the corresponding pipeline of the latter device through various pipelines and / or valves.

[0142] Illustratively, in the aforementioned embodiment, the third heat exchanger 102103 transfers the refrigerant after heat exchange to the compressor 101101, which means that after the refrigerant exchanges heat with the outdoor environment in the third heat exchanger 102103, it flows out from one end of the refrigerant pipeline of the third heat exchanger 102103, passes through the refrigerant side proportional three-way valve 301 and the four-way reversing valve 102, and then flows into one end of the refrigerant pipeline of the compressor 101101, thereby being compressed in the compressor 101101.

[0143] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0144] For the convenience of description, the above system or device is described by dividing it into various modules or units according to its functions. Of course, when implementing the present application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0145] It can be known from the description of the above implementation methods that those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present application or certain parts of the embodiments.

[0146] Finally, it should be noted that, in this article, relational terms such as first, second, third and fourth are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0147] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An air conditioner, water heater and refrigerator joint control system, characterized in that: include: Indoor heat exchanger, water heater, refrigerator, compressor, first valve system, second valve system, first heat exchanger and second heat exchanger; The refrigerant pipeline of the first heat exchanger is connected to the outlet of the compressor, the refrigerant pipeline of the first heat exchanger and the refrigerant pipeline of the second heat exchanger are connected in series, and the refrigerant pipeline of the second heat exchanger is connected to the inlet of the compressor; The water heater is connected to the circulating water pipeline of the first heat exchanger, and the refrigerator is connected to the circulating water pipeline of the second heat exchanger; The water inlet of the indoor heat exchanger is connected to the water outlet of the circulating water pipeline of the first heat exchanger and the water outlet of the circulating water pipeline of the second heat exchanger through the first valve system; The water outlet of the indoor heat exchanger is connected to the water inlet of the circulating water pipeline of the first heat exchanger and the water inlet of the circulating water pipeline of the second heat exchanger through the second valve system; The first valve system and the second valve system are used for: When the indoor heat exchanger is in the first mode, controlling the circulating water pipeline of the first heat exchanger to be connected to the indoor heat exchanger; When the indoor heat exchanger is in the second mode, the circulating water pipeline of the second heat exchanger is controlled to be connected to the indoor heat exchanger.

2. The system according to claim 1, characterized in that The first valve system includes a first water side proportional three-way valve, a second water side proportional three-way valve and a first switch three-way valve; The second valve system includes a second on-off three-way valve, a first check valve and a second check valve; The first water-side proportional three-way valve connects the first heat exchanger, the first switch three-way valve and the water heater; The second water-side proportional three-way valve is connected to the second heat exchanger, the first switch three-way valve and the refrigerator; The first switch three-way valve is connected to the first water-side proportional three-way valve, the second water-side proportional three-way valve and the water inlet of the indoor heat exchanger; The second on-off three-way valve is connected to the water outlet of the indoor heat exchanger, the first check valve and the second check valve; The first check valve connects the second on-off three-way valve and the first heat exchanger; The second check valve connects the second on-off three-way valve and the second heat exchanger.

3. The system according to claim 1, characterized in that Also included is a third heat exchanger; The third heat exchanger is used to exchange heat between the refrigerant and the outdoor environment, and the refrigerant circulation pipeline of the third heat exchanger is connected to the outlet of the compressor.

4. The system according to claim 3, characterized in that It also includes a first refrigerant side proportional three-way valve; The first refrigerant-side proportional three-way valve connects the outlet of the compressor, the refrigerant circulation pipeline of the first heat exchanger, and the refrigerant circulation pipeline of the third heat exchanger.

5. The system according to claim 1, characterized in that Also included is a fourth heat exchanger; The fourth heat exchanger is used to exchange heat between the refrigerant and the outdoor environment, and the refrigerant circulation pipeline of the fourth heat exchanger is connected to the inlet of the compressor.

6. The system according to claim 5, characterized in that Also included is a second refrigerant side proportional three-way valve; The second refrigerant-side proportional three-way valve connects the refrigerant circulation pipeline of the first heat exchanger, the refrigerant circulation pipeline of the second heat exchanger, and the refrigerant circulation pipeline of the fourth heat exchanger.

7. The system according to claim 1, characterized in that Also includes a second buffer water tank and a first buffer water tank; The second buffer water tank is connected between the valve system and the circulating water pipeline of the first heat exchanger; The first buffer water tank is connected between the valve system and the circulating water pipeline of the second heat exchanger.

8. The system according to claim 1, characterized in that Also includes water purification module; The water purification module is connected between the valve system and the water heater.

9. The system according to claim 1, characterized in that Also includes a third check valve, a fourth check valve and a fifth check valve; The third check valve is arranged at the water outlet of the refrigerator; The fourth check valve is arranged at the water outlet of the indoor heat exchanger; The fifth check valve is arranged at the water outlet of the water heater.

10. The system according to claim 1, characterized in that It also includes a water supply valve, a first water mixing valve and a second water mixing valve; The water supply valve is arranged at the water inlet of the refrigerator; The first water mixing valve is arranged at the water inlet of the indoor heat exchanger; The second water mixing valve is arranged at another water inlet of the water heater.

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