Water heater system and control method thereof

Abstract

The application relates to a hot water machine system and a control method thereof. The hot water machine system comprises a main machine comprising a first fan arranged outdoors; a waste heat collector arranged at an air outlet of the first fan; a first pipeline, a first end of the first pipeline being in communication with an air outlet of the waste heat collector, a second end of the first pipeline being in communication with a first room, and a first control valve being arranged at an upstream of the first pipeline; a second pipeline, a first end of the second pipeline being in communication with a fresh air outlet, a second end of the second pipeline being in communication with a downstream of the first pipeline, and a second control valve being arranged on the second pipeline; a first temperature detection device, the first temperature detection device being configured to detect a first temperature of the first room; and a controller, the controller being electrically connected with the first control valve and the second control valve. The cold air or the hot air discharged by the main machine can be recycled, the normal heating or refrigeration of other rooms is not affected, the energy consumption of the unit is reduced, the energy is saved, and the user experience is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, and in particular to a hot water machine system and a control method thereof. BACKGROUND

[0002] In recent years, with the increasing global energy consumption, people pay more attention to the importance of energy saving. In the related art, the existing multifunctional hot water machine has five modes of refrigeration, heating, hot water making, refrigeration-hot water making, and heating-hot water making. In the refrigeration mode, the hot air (hot air temperature is 15°-60°) is discharged from the outlet of the outdoor fan of the main unit. In the heating mode, the cold air (cold air temperature is -32°-20°) is discharged from the outlet of the outdoor fan of the main unit. Currently, the hot air and the cold air at the outlet of the outdoor fan are directly discharged into the air, which wastes these energies, resulting in high energy consumption of the unit and easy to cause user complaints. SUMMARY

[0003] The present application provides a hot water machine system and a control method thereof to solve the technical problem that the hot air and the cold air discharged from the existing hot water unit are directly discharged into the air, which wastes these energies, resulting in high energy consumption of the unit and easy to cause user complaints.

[0004] In a first aspect, the present application provides a hot water machine system, comprising: a main unit comprising a first fan arranged outdoors; a waste heat collector arranged at an air outlet of the first fan; a first pipeline, a first end of the first pipeline being in communication with an air outlet of the waste heat collector, a second end of the first pipeline being in communication with a first room, so as to introduce the cold air or the hot air recovered by the waste heat collector into the first room, a first control valve being arranged at an upstream of the first pipeline; a second pipeline, a first end of the second pipeline being in communication with a fresh air inlet, a second end of the second pipeline being in communication with a downstream of the first pipeline, the fresh air inlet being used to introduce outdoor fresh air, a second control valve being arranged on the second pipeline; a first temperature detection device, the first temperature detection device being configured to detect a first temperature of the first room; and a controller, the controller being electrically connected with the first control valve and the second control valve, the controller being configured to, when the main unit is in a heating mode, if the first temperature of the first room is greater than a first temperature threshold, control the first control valve and the second control valve to be in an open state, so as to make the cold air discharged by the first fan mixed with the outdoor fresh air and then enter the first room from the first pipeline.

[0005] In a possible implementation, the second temperature detection device is arranged, the second temperature detection device is configured to detect a second temperature of the second end of the first pipeline; the controller is electrically connected with the second temperature detection device, and the controller is configured to, when the main unit is in the heating mode, control an opening degree of the second control valve based on a difference between the second temperature of the second end of the first pipeline and the first temperature threshold.

[0006] In a possible implementation, the water heater system comprises a third pipeline, a first end of the third pipeline is in communication with the air outlet of the waste heat collector, a second end of the third pipeline is in communication with the outdoor, and a third control valve is arranged on the third pipeline; the controller is electrically connected with the third control valve, and the controller is configured to, in a state where the host is in the heating mode, the opening degree of the second control valve is adjusted to the maximum, and the second temperature is less than the first temperature threshold, control the third control valve to be in an open state.

[0007] In a possible implementation, the controller is electrically connected with the first fan, and the controller is configured to, in a state where the host is in the heating mode, the opening degree of the second control valve reaches the minimum opening degree, and the second temperature is greater than the first temperature threshold, control the rotating speed of the first fan to increase.

[0008] In a possible implementation, the water heater system comprises a first heat exchanger and a second heat exchanger, the first heat exchanger is arranged outdoors, the first fan is arranged on the first heat exchanger, the second heat exchanger is arranged in the second room, a fifth pipeline is connected between the refrigerant inlet of the second heat exchanger and the refrigerant outlet of the first heat exchanger, and an electronic expansion valve is arranged on the fifth pipeline; the controller is electrically connected with the electronic expansion valve, and the controller is configured to, in a state where the host is in the heating mode, the opening degree of the second control valve reaches the minimum opening degree, and the second temperature is greater than the first temperature threshold, control the opening degree of the electronic expansion valve to decrease.

[0009] In a possible implementation, the fresh air outlet is provided with a heating element, the controller is electrically connected with the heating element, and the controller is configured to, in a state where the host is in the cooling mode, if the first temperature is less than the second temperature threshold, control the first control valve and the second control valve to be in an open state, and control the heating element to be turned on, so that the hot air discharged by the first fan and the outdoor fresh air are mixed and then enter the first room from the first pipeline, wherein the first temperature threshold is less than the second temperature threshold.

[0010] In a possible implementation, the heating element is provided with a plurality of heating elements, the water heater system comprises a second temperature detection device, the second temperature detection device is configured to detect a second temperature of a second end of the first pipeline; the controller is electrically connected with the second temperature detection device, and the controller is configured to, in a state where the host is in the heating mode, control the opening degree of the second control valve and / or the number of heating elements turned on based on a difference between the second temperature and the second temperature threshold.

[0011] In a possible implementation, the hot water machine system comprises a water tank, a converter, a fourth pipeline and a third temperature detection device, a first end of the fourth pipeline is connected with the air outlet of the waste heat collector, a second end of the fourth pipeline is connected with the converter, a fourth control valve is arranged on the fourth pipeline, and the converter is arranged in the water tank; the third temperature detection device is configured to detect a third temperature of the water tank; and the controller is electrically connected with the third temperature detection device and the fourth control valve, and is configured to, when the host is in the refrigeration mode, control the fourth control valve to be in an open state if the third temperature is less than a third temperature threshold, so that the hot air discharged by the first air fan is heated by the converter to heat the water stored in the water tank.

[0012] In a possible implementation, the hot water machine system comprises a compressor, a refrigerant inlet of the first heat exchanger is connected with an exhaust port of the compressor through a sixth pipeline, a refrigerant outlet of the second heat exchanger is connected with an air inlet of the compressor through a seventh pipeline, and the sixth pipeline and the seventh pipeline are provided with a four-way valve; a flow path of the four-way valve is controllably switched between the compressor, the first heat exchanger and the second heat exchanger, so as to realize switching of the compressor between the refrigeration mode and the heating mode.

[0013] In a second aspect, the present application provides a control method of a hot water machine system, which is applied to the hot water machine system as described above, and the control method comprises the following steps: obtaining an operation mode of a host of the hot water machine system and a first temperature of a first room; and when the host is in a heating mode, controlling a first control valve and a second control valve to be in an open state if the first temperature is greater than a first temperature threshold.

[0014] In a possible implementation, the hot water machine system comprises a second temperature detection device, and the control method comprises the following steps: obtaining a second temperature of a second end of the first pipeline; and when the host is in the heating mode, controlling an opening degree of the second control valve based on a difference between the second temperature and the first temperature threshold.

[0015] In a possible implementation, the control of the opening degree of the second control valve based on the difference between the second temperature and the first temperature threshold comprises: increasing the opening degree of the second control valve if the difference between the second temperature and the first temperature threshold is a negative value; and decreasing the opening degree of the second control valve if the difference between the second temperature and the first temperature threshold is a positive value.

[0016] In a possible implementation, the hot water machine system comprises a third pipeline, a first end of the third pipeline is in communication with the air outlet of the waste heat collector, a second end of the third pipeline is in communication with the outdoor, and a third control valve is arranged on the third pipeline; and the control method comprises the following step: when the host is in the heating mode, controlling the third control valve to be in an open state if the opening degree of the second control valve is adjusted to a maximum and the second temperature is less than the first temperature threshold.

[0017] In a possible implementation, the control method comprises: obtaining the rotating speed of the first fan; and when the host is in the heating mode, if the opening degree of the second control valve reaches the minimum opening degree and the second temperature is greater than the first temperature threshold, the rotating speed of the first fan is controlled to increase.

[0018] In a possible implementation, the water heater system comprises a first heat exchanger and a second heat exchanger, the first heat exchanger is arranged outdoors, the first fan is arranged on the first heat exchanger, the second heat exchanger is arranged in the second room, and the refrigerant inlet of the second heat exchanger is connected with the refrigerant outlet of the first heat exchanger through a fifth pipeline, and an electronic expansion valve is arranged on the fifth pipeline. The control method comprises: when the host is in the heating mode, if the opening degree of the second control valve reaches the minimum opening degree and the second temperature is greater than the first temperature threshold, the opening degree of the electronic expansion valve is controlled to decrease.

[0019] In a possible implementation, the water heater system comprises a heating component arranged at the fresh air inlet. The control method comprises: when the host is in the cooling mode, if the first temperature is less than the second temperature threshold, the first control valve and the second control valve are controlled to be in the open state, and the heating component is controlled to be turned on, wherein the first temperature threshold is less than the second temperature threshold.

[0020] In a possible implementation, the heating component is arranged in plurality. The water heater system comprises a second temperature detection device. The control method comprises: obtaining the second temperature of the second end of the first pipeline; and when the host is in the cooling mode, the opening degree of the second control valve and / or the number of the heating components that are turned on are controlled based on the difference between the second temperature and the second temperature threshold.

[0021] In a possible implementation, the water heater system comprises a water tank, a converter, a fourth pipeline and a third temperature detection device. The first end of the fourth pipeline is connected with the air outlet of the waste heat collector, the second end of the fourth pipeline is connected with the converter, the fourth control valve is arranged on the fourth pipeline, and the converter is arranged in the water tank. The control method comprises: obtaining the third temperature of the water tank; and when the host is in the cooling mode, if the third temperature is less than the third temperature threshold, the fourth control valve is controlled to be in the open state.

[0022] Compared with the prior art, the above technical solutions provided by the embodiments of the present application have the following advantages:

[0023] The hot water machine system and the control method thereof provided by the embodiment of the present application, if T1>Tm1, indicating that the temperature of the first room is too high at this time, the first control valve and the second control valve are controlled to be in the open state, the cold air discharged by the first fan is mixed with the outdoor fresh air downstream of the first pipeline to obtain low-temperature mixed air, and the low-temperature mixed air enters the first room from the first pipeline and cools the first room, thereby improving the user experience. By recycling the cold air discharged by the host, and simultaneously utilizing the low temperature of the outdoor fresh air, the first room can be cooled separately without affecting the normal heating of other rooms. Compared with the existing air conditioning system for cooling the first room, the energy consumption of the unit can be reduced, the energy can be saved, and the user experience can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained from these drawings without any creative labor.

[0026] One or more embodiments are exemplarily illustrated by pictures in the drawings corresponding thereto, and these exemplary illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified. The drawings in the drawings do not constitute a proportional limitation.

[0027] Figure 1 A structural schematic diagram of a hot water machine system provided by the embodiment of the present application;

[0028] Figure 2 A working principle schematic diagram of a host provided by the embodiment of the present application, wherein the hollow arrow shows the refrigerant flow direction in the cooling mode, and the solid arrow shows the refrigerant flow direction in the heating mode;

[0029] Figure 3 A flowchart of a control method of a hot water machine system provided by the embodiment of the present application.

[0030] Explanation of reference numerals:

[0031] 100, hot water machine system;

[0032] 1, host; 11, first fan; 12, compressor; 13, first heat exchanger; 14, second heat exchanger; 15, electronic expansion valve; 16, four-way valve;

[0033] 2, waste heat collector; 3, first room; 4, fresh air outlet; 41, heating element; 42, filter screen; 5, water tank; 6, converter;

[0034] G1, first pipeline; G2, second pipeline; G3, third pipeline; G4, fourth pipeline; G5, fifth pipeline; G6, sixth pipeline; G7, seventh pipeline;

[0035] V1, first control valve; V2, second control valve; V3, third control valve; V4, fourth control valve. DETAILED DESCRIPTION

[0036] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0037] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplicity, the elements and settings of the particular examples in the following description are depicted in the drawings. It should be noted, however, that these are merely examples and are not intended to limit the present application. In addition, the present application can make repeated reference numerals and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not indicate a relationship between the various embodiments and / or settings being discussed.

[0038] For the convenience of description, spatial relative terms can be used in the description to describe the relative position relationship or movement condition of one element or feature with respect to another element or feature as shown in the drawings, such as "inner", "outer", "inboard", "outboard", "under", "below", "on", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is flipped over or the posture is changed or the movement state is changed, the directional indications will also change accordingly, for example: the element described as "under" or "below" another element or feature will be oriented as "above" or "over" the other element or feature. Therefore, the example term "below" can include both upward and downward orientations. The device can be additionally oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the description are interpreted accordingly.

[0039] In the prior art, the multifunctional water heater has five modes of refrigeration, heating, hot water making, refrigeration-hot water making, and heating-hot water making. In the refrigeration mode, hot air (hot air temperature: 15°-60°) is discharged from the air outlet of the outdoor fan of the main unit. In the heating mode, cold air (cold air temperature: -32°-20°) is discharged from the air outlet of the outdoor fan of the main unit. Currently, the hot air and cold air at the air outlet of the outdoor fan are directly discharged into the air, which wastes the energy and leads to high energy consumption of the unit, thereby easily causing complaints from users.

[0040] To solve the technical problem that the hot air and cold air discharged from the existing water heater unit are directly discharged into the air, which wastes the energy and leads to high energy consumption of the unit, thereby easily causing complaints from users, the present application provides a water heater system and a control method thereof, which can recycle the cold air or hot air discharged from the main unit without affecting the normal heating or refrigeration of other rooms, thereby reducing the energy consumption of the unit, saving energy, and improving user experience.

[0041] As shown in Figure 1 The present application provides a water heater system 100, which comprises a main unit 1, a waste heat collector 2, a first pipeline G1, a second pipeline G2, a first temperature detection device, and a controller. The main unit 1 comprises a first fan 11 arranged outdoors, and the waste heat collector 2 is arranged at the air outlet of the first fan 11. It should be noted that the waste heat collector can adopt an air heat recovery device in the prior art. The air heat recovery device is a device that transfers the excess heat generated by one device to another device for heating or energy conversion, and is an economical and environmentally friendly device. The specific structure and working principle thereof can refer to the prior art. Arranging the waste heat collector 2 at the air outlet of the first fan 11 can recycle the hot air or cold air discharged from the air outlet of the first fan 11 of the main unit 1.

[0042] The first end of the first pipeline G1 is in communication with the air outlet of the waste heat collector 2, and the second end of the first pipeline G1 is in communication with a first room 3, so as to introduce the cold air or hot air recycled by the waste heat collector 2 into the first room 3. A first control valve V1 is arranged upstream of the first pipeline G1. By controlling the first control valve V1 to be in an open state, the cold air or hot air recycled by the waste heat collector 2 is introduced into the first room 3 from the first pipeline G1, thereby achieving the temperature reduction or temperature rise of the first room 3.

[0043] The first end of the second pipeline G2 is communicated with the fresh air inlet 4, the second end of the second pipeline G2 is communicated with the downstream of the first pipeline G1, the fresh air inlet 4 is communicated with the outdoor, used for introducing outdoor fresh air, and the second control valve V2 is arranged on the second pipeline G2. The second control valve V2 can adopt an existing proportional regulating valve, by controlling the second control valve V2 to be in an open state, so that the outdoor fresh air is introduced into the first pipeline G1 from the second pipeline G2, and mixed with the recovered cold air or hot air, and the low-temperature mixed air or high-temperature mixed air is introduced into the first room 3 from the downstream of the first pipeline G1.

[0044] The first temperature detection device is configured to detect the first temperature of the first room 3; the controller is electrically connected with the first control valve V1 door and the second control valve V2 door, and the controller is configured to, when the main machine 1 is in the heating mode, if the first temperature T1 of the first room 3 is greater than the first temperature threshold Tm1, control the first control valve V1 and the second control valve V2 to be in the open state, so that the cold air discharged by the first fan 11 is mixed with the outdoor fresh air and then enters the first room 3 from the first pipeline G1.

[0045] It can be understood that in winter or transition season, the bedroom needs heating, and in the case that the kitchen temperature is too high due to cooking, causing user discomfort, the cold air discharged by the first fan 11 can be used to cool the kitchen. Specifically, when the main machine 1 is in the heating mode, if T1>Tm1, it indicates that the temperature of the first room 3 is too high at this time, the first control valve V1 and the second control valve V2 are controlled to be in the open state, the outlet air temperature Tf of the first fan 11 in the heating mode is -32°~20°, and the outdoor fresh air temperature Th in winter or transition season is also low, generally Th

[0046] Optionally, the fresh air inlet 4 is provided with a filter screen 42 away from one end of the second pipeline G2, and the filter screen 42 can filter dust and impurities in the outdoor fresh air, so as to improve the cleanliness of the fresh air, and further improve the user experience.

[0047] In some embodiments, a second temperature detection device is included, which is configured to detect a second temperature T2 of the second end of the first pipeline G1; the controller is electrically connected with the second temperature detection device, and the controller is configured to control the opening degree of the second control valve V2 based on the difference between the second temperature of the second end of the first pipeline G1 and the first temperature threshold when the host 1 is in the heating mode.

[0048] The second control valve V2 can adopt a proportional regulating valve in the prior art, the opening degree of which can be adjusted, and the specific structure of the second control valve V2 can refer to the prior art. It can be understood that the second temperature of the second end of the first pipeline G1 represents the mixed air temperature, and in the heating mode, if T2>Tm1, the first control valve V1 and the second control valve V2 are both controlled to be in the open state, and at this time, the second control valve V2 is in the minimum opening degree.

[0049] Specifically, in one example, if the difference between the second temperature and the first temperature threshold is negative, i.e., T2

[0050] In another example, if the difference between the second temperature and the first temperature threshold is positive, i.e., T2>Tm1, the opening degree of the second control valve V2 is reduced. That is, in the case where the mixed air temperature is higher than the first temperature threshold, the opening degree of the second control valve V2 is reduced, so that less outdoor fresh air is mixed with the cold air discharged by the first air fan 11, thereby reducing the mixed air temperature, and when T2=Tm1, the current opening degree of the second control valve V2 is maintained, so that the first temperature T1 of the first room 3 gradually decreases to the target temperature Tm1 under the action of the low-temperature mixed air.

[0051] In some embodiments, the hot water machine system 100 includes a third pipeline G3, a first end of the third pipeline G3 is in communication with the air outlet of the waste heat collector 2, a second end of the third pipeline G3 is in communication with the outdoor, and a third control valve V3 is arranged on the third pipeline G3; the controller is electrically connected with the third control valve V3, and the controller is configured to control the third control valve V3 to be in the open state when the host 1 is in the heating mode, and the opening degree of the second control valve V2 is adjusted to the maximum, and the second temperature is less than the first temperature threshold.

[0052] In the state that the opening degree of the second control valve V2 is adjusted to the maximum, and the second temperature is less than the first temperature threshold, that is, the outdoor fresh air inlet air volume is the maximum, but the mixed air temperature is still lower than the first temperature threshold, at this time, the third control valve V3 is controlled to be in the open state, so that a part of the cold air of the first fan 11 is discharged to the outdoor from the third pipeline G3, and the cold air is mixed with the outdoor fresh air, so as to improve the mixed air temperature. Until T2=Tm1, the first temperature T1 of the first room 3 is gradually reduced to the target temperature Tm1 under the action of the low-temperature mixed air.

[0053] In some embodiments, the controller is electrically connected with the first fan 11, and the controller is configured to, in the state that the host 1 is in the heating mode, the opening degree of the second control valve V2 reaches the minimum opening degree, and the second temperature is greater than the first temperature threshold, control the rotating speed of the first fan 11 to increase.

[0054] In the state that the opening degree of the second control valve V2 reaches the minimum opening degree, and the second temperature is greater than the first temperature threshold, that is, the outdoor fresh air inlet air volume is the minimum, but the mixed air temperature is still higher than the first temperature threshold, at this time, the rotating speed of the first fan 11 is controlled to increase, the heat exchange efficiency of the first fan 11 and the first heat exchanger 13 is accelerated, and the cold air outlet air volume of the first fan 11 is improved, so that more cold air is mixed with the outdoor fresh air, thereby reducing the mixed air temperature. Until T2=Tm1, the current rotating speed of the first fan 11 is maintained, so that the first temperature T1 of the first room 3 is gradually reduced to the target temperature Tm1 under the action of the low-temperature mixed air.

[0055] In some embodiments, as shown in Figure 2 The hot water machine system 100 includes the first heat exchanger 13 and the second heat exchanger 14, the first heat exchanger 13 is arranged outdoors, the first fan 11 is arranged on the first heat exchanger 13, the second heat exchanger 14 is arranged in the second room, the refrigerant inlet of the second heat exchanger 14 and the refrigerant outlet of the first heat exchanger 13 are connected through the fifth pipeline G5, and the electronic expansion valve 15 is arranged on the fifth pipeline G5; the controller is electrically connected with the electronic expansion valve 15, and the controller is configured to, in the state that the host 1 is in the heating mode, the opening degree of the second control valve V2 reaches the minimum opening degree, and the second temperature is greater than the first temperature threshold, control the opening degree of the electronic expansion valve 15 to decrease.

[0056] The host 1 is in the heating mode, the compressor 12 inhales the low-temperature and low-pressure gas from the first heat exchanger 13 (equivalent to the evaporator in the heating mode), and is compressed to high-temperature and high-pressure liquid, and the high-temperature and high-pressure liquid enters the second heat exchanger 14 (equivalent to the condenser in the heating mode) after throttling by the electronic expansion valve 15, and the high-temperature and high-pressure refrigerant is liquefied to medium-temperature and high-pressure liquid by heat exchange with the external medium in the second heat exchanger 14, and is then sent to the suction port of the compressor 12. In the state that the opening degree of the second control valve V2 reaches the minimum opening degree, and the second temperature is greater than the first temperature threshold, that is, the outdoor fresh air intake amount is minimum, but the mixed air temperature is still higher than the first temperature threshold, at this time, the opening degree of the electronic expansion valve 15 is reduced, the refrigerant flow rate sucked by the compressor 12 on the low-pressure side is reduced, more low-temperature refrigerant in the first heat exchanger 13 exchanges heat with the air, so as to reduce the temperature of the cold air discharged by the first fan 11, and further reduce the mixed air temperature, and at the same time, the suction superheat degree of the compressor 12 can be reduced, so as to ensure the efficiency of the compressor 12, thereby being beneficial to the heating or hot water production of the unit.

[0057] Of course, the present embodiment can be combined with the above-mentioned embodiments to obtain more embodiments. In a preferred example, if the opening degree of the second control valve V2 reaches the minimum opening degree, and the rotation speed of the first fan 11 reaches the maximum, but the second temperature is still greater than the first temperature threshold, the opening degree of the electronic expansion valve 15 is further reduced. That is, the mixed air temperature is reduced by preferentially increasing the rotation speed of the first fan 11, and then by reducing the opening degree of the electronic expansion valve 15.

[0058] In some embodiments, the fresh air port 4 is provided with a heating element 41, and the controller is electrically connected with the heating element 41, and the controller is configured to, in the cooling mode of the host 1, if the first temperature is less than the second temperature threshold Tm2, control the first control valve V1 and the second control valve V2 to be in the open state, and control the heating element 41 to be turned on, so that the hot air discharged by the first fan 11 mixes with the outdoor fresh air and then enters the first room 3 from the first pipeline G1, wherein Tm1

[0059] It should be noted that the heating element 41 can use existing resistance wire. After the heating element 41 is turned on, the outdoor fresh air can be heated, and the heated outdoor fresh air is mixed with the hot air discharged by the first fan 11 to obtain high-temperature mixed air. It can be understood that in summer or transition season, the bedroom needs to be cooled, and the laundry room needs to be dried due to low temperature and high humidity. The hot air discharged by the first fan 11 can be used to heat the laundry room to dry the clothes. Specifically, when the main machine 1 is in cooling mode, if T1 < Tm2, it indicates that the temperature of the first room 3 is too low, which is not conducive to drying clothes. The outlet temperature Tf of the outlet of the outdoor fan of the main machine 1 is 15°~60°, and the temperature of the outdoor fresh air in summer or transition season is also relatively high. Generally, Th < Tf. The first control valve V1 and the second control valve V2 are in the open state, the hot air discharged by the first fan 11 is mixed with the outdoor fresh air downstream of the first pipeline G1 to obtain high-temperature mixed air, and the high-temperature mixed air enters the first room 3 from the first pipeline G1 and heats the first room 3, thereby drying the clothes. By recycling the hot air discharged by the main machine 1 and using the high temperature of the outdoor fresh air, the first room 3 can be heated separately without affecting the normal cooling of other rooms. Compared with the existing air conditioning system for heating the first room 3, the energy consumption of the unit can be reduced, the energy can be saved, and the user experience can be improved.

[0060] In some embodiments, the heating element 41 is provided with a plurality of heating elements, and the hot water machine system 100 comprises a second temperature detection device configured to detect a second temperature of a second end of the first pipeline G1; the controller is electrically connected with the second temperature detection device, and the controller is configured to, when the main machine 1 is in heating mode, control the opening degree of the second control valve V2 and / or the number of heating elements 41 turned on based on the difference between the second temperature and the second temperature threshold, thereby adjusting the mixed air temperature.

[0061] It can be understood that the second temperature T2 of the second end of the first pipeline G1 represents the mixed air temperature. In cooling mode, if T1 < Tm2, the first control valve V1 and the second control valve V2 are both in the open state, and the second control valve V2 is in the lowest opening degree. Of course, the present embodiment can also be combined with the above-mentioned embodiments to obtain more embodiments, which are described as follows.

[0062] The opening of the second control valve V2 is controlled based on the difference between the second temperature and the second temperature threshold, and specifically, in one example, if the difference between the second temperature and the second temperature threshold is positive, i.e. T2>Tm2, the opening of the second control valve V2 is increased. That is, in the case where the mixed air temperature is higher than the second temperature threshold, since ThTf, the opening of the second control valve V2 is increased so that more outdoor fresh air is mixed with the hot air discharged by the first air fan 11, thereby appropriately reducing the mixed air temperature until T2=Tm1, the current opening of the second control valve V2 is maintained, so that the first temperature T1 of the first room 3 gradually increases to the target temperature Tm2 under the action of the high-temperature mixed air.

[0063] In one example, the hot water machine system 100 comprises a third pipeline G3 and a third control valve V3, and if the opening of the second control valve V2 reaches the maximum and T2>Tm2, the third control valve V3 is controlled to be in the open state so that part of the hot air discharged by the first air fan 11 is discharged outdoors through the third pipeline G3, thereby appropriately reducing the mixed air temperature.

[0064] The opening of the second control valve V2 is controlled based on the difference between the second temperature and the second temperature threshold, and specifically, in one example, if the difference between the second temperature and the second temperature threshold is negative, i.e. T2

[0065] The number of heating elements 41 that are turned on is controlled based on the difference between the second temperature and the second temperature threshold, and specifically, taking the case where the heating elements 41 are provided in two groups as an example, only one of the heating elements 41 is initially controlled to be turned on. In one example, if the second control valve V2 is already at the minimum opening and the difference between the second temperature and the second temperature threshold is still negative, i.e. T2

[0066] In one example, if the mixed air temperature T2 is still less than the second temperature threshold Tm2 after all the heating elements 41 are turned on, the speed of the first air fan 11 is controlled to be increased, thereby increasing the heat exchange efficiency of the first air fan 11 and the first heat exchanger 13, so as to increase the outlet air temperature Tf of the first air fan 11 and further increase the mixed air temperature.

[0067] In one example, if the rotation speed of the first fan 11 reaches the maximum rotation speed and the mixed air temperature T2 is still less than the second temperature threshold Tm2, the opening degree of the electronic expansion valve 15 is reduced to increase the refrigerant flow rate on the high-pressure side of the compressor 12, so that the first heat exchanger 13 has more high-temperature refrigerant to exchange heat with the air, thereby increasing the outlet air temperature Tf of the first fan 11 and further increasing the mixed air temperature. At this time, within a certain range, increasing the rotation speed of the first fan 11 and reducing the opening degree of the electronic expansion valve 15 are both conducive to the refrigeration of the second heat exchanger 14.

[0068] In some embodiments, a water tank 5, a converter 6, a fourth pipeline G4, and a third temperature detection device are included. The first end of the fourth pipeline G4 is connected to the air outlet of the waste heat collector 2, the second end of the fourth pipeline G4 is connected to the converter 6, the fourth pipeline G4 is provided with a fourth control valve V4, and the converter 6 is arranged in the water tank 5. Specifically, the converter 6 includes a condensing coil, high-temperature air in the condensing coil exchanges heat with water in the water tank 5, thereby heating the water stored in the water tank 5. The third temperature detection device is configured to detect the third temperature T3 of the water tank 5. The controller is electrically connected with the third temperature detection device and the fourth control valve V4, and is configured to, when the main machine 1 is in the refrigeration mode, if the third temperature is less than the third temperature threshold Tm3, control the fourth control valve V4 to be in an open state, so that the hot air discharged by the first fan 11 heats the water stored in the water tank 5 through the fourth pipeline G4 and the converter 6.

[0069] When the main machine 1 is in the refrigeration mode, if T3 < Tm3, it indicates that there is a demand for hot water at this time, the waste heat collector 2 collects the hot air discharged by the first fan 11, the hot air enters the condensing coil of the converter 6 through the fourth pipeline, the high-temperature air in the condensing coil exchanges heat with the water in the water tank 5, thereby heating the water stored in the water tank 5. By recycling the hot air discharged by the main machine 1 for hot water, the normal heating or refrigeration of other rooms is not affected, thereby reducing the energy consumption of the unit, saving energy, and improving the user experience. In the refrigeration mode, if the water temperature and the room refrigeration demand need to be met at the same time, the room refrigeration demand is given priority.

[0070] In some embodiments, the hot water machine system 100 includes a compressor 12, the refrigerant inlet of the first heat exchanger 13 is connected to the exhaust port of the compressor 12 through a sixth pipeline G6, the refrigerant outlet of the second heat exchanger 14 is connected to the air inlet of the compressor 12 through a seventh pipeline G7, and the sixth pipeline G6 and the seventh pipeline G7 are provided with a four-way valve 16. The flow path of the four-way valve 16 is controllably switched between the compressor 12, the first heat exchanger 13, and the second heat exchanger 14, so as to realize the switching of the compressor 12 between the refrigeration mode and the heating mode.

[0071] In the refrigeration mode, the compressor 12 sucks the low-pressure refrigerant vapor from the second heat exchanger 14 (which corresponds to an evaporator at this time) and sends it to the first heat exchanger 13 (which corresponds to a condenser in the refrigeration mode) after increasing the pressure, and the refrigerant liquid condensed in the first heat exchanger 13 at a high pressure. After being throttled by the throttling element, the refrigerant liquid becomes a low-pressure liquid, and then enters the second heat exchanger 14 (which corresponds to an evaporator in the refrigeration mode) to be evaporated by heat absorption and become a low-pressure vapor, and then enters the suction port of the compressor 12, thereby completing the refrigeration cycle. The four-way valve 16 switches the internal flow path, and in the heating mode, the compressor 12 sucks the low-temperature and low-pressure gas from the first heat exchanger 13 (which corresponds to an evaporator in the heating mode), and the low-temperature and low-pressure gas is compressed to become a high-temperature and high-pressure liquid. The high-temperature and high-pressure liquid enters the second heat exchanger 14 (which corresponds to a condenser in the heating mode), and the high-temperature and high-pressure refrigerant in the second heat exchanger 14 is liquefied by heat release to become a medium-temperature and high-pressure liquid, and then enters the suction port of the compressor 12, thereby completing the heating cycle. Of course, the second heat exchanger 14 can be provided with a second fan, and the refrigerant in the second heat exchanger 14 exchanges heat with air, and the air outlet of the second fan faces the second room to send cold air or hot air into the second room.

[0072] As shown in Figure 3 The control method of the water heater system 100 provided by the embodiment of the present application is applied to the water heater system 100 as described above, and the control method comprises the following steps:

[0073] S1, obtaining the operation mode of the main machine 1 of the water heater system 100 and the first temperature of the first room 3;

[0074] S2, when the main machine 1 is in the heating mode, if the first temperature is greater than the first temperature threshold value, the first control valve V1 and the second control valve V2 are controlled to be in the open state.

[0075] If T1>Tm1, it indicates that the temperature of the first room 3 is too high at this time, and the first control valve V1 and the second control valve V2 are controlled to be in the open state. The outlet air temperature Tf of the first fan 11 in the heating mode is -32°~20°, and the outdoor fresh air temperature Th in winter or the transition season is also low, generally Th

[0076] In some embodiments, the water heater system 100 comprises a second temperature detecting device, and the control method further comprises the following steps:

[0077] obtaining a second temperature of the second end of the first pipeline G1;

[0078] controlling the opening degree of the second control valve V2 based on the difference between the second temperature and the first temperature threshold when the main machine 1 is in the heating mode. By adjusting the opening degree of the second control valve V2, the mixed air temperature T2 can be adjusted.

[0079] Further, controlling the opening degree of the second control valve V2 based on the difference between the second temperature and the first temperature threshold further comprises the following steps:

[0080] If the difference between the second temperature and the first temperature threshold is negative, i.e. T2

[0081] If the difference between the second temperature and the first temperature threshold is positive, i.e. T2

[0082] In some embodiments, the water heater system 100 comprises a third pipeline G3, the first end of the third pipeline G3 is in communication with the air outlet of the waste heat collector 2, the second end of the third pipeline G3 is in communication with the outdoor, and the third control valve V3 is arranged on the third pipeline G3, and the control method comprises the following steps:

[0083] If the opening degree of the second control valve V2 is adjusted to the maximum and the second temperature is less than the first temperature threshold when the main machine 1 is in the heating mode, the third control valve V3 is controlled to be in the open state.

[0084] That is, the outdoor fresh air intake is the largest, but the mixed air temperature is still lower than the first temperature threshold, at this time, the third control valve V3 is controlled to be in an open state, so that a part of the cold air of the first fan 11 is discharged from the third pipeline G3 to the outdoor, and the cold air is mixed with the outdoor fresh air to increase the mixed air temperature. Until T2=Tm1, the first temperature T1 of the first room 3 is gradually lowered to the target temperature Tm1 under the action of the low-temperature mixed air.

[0085] In some embodiments, the control method comprises the following steps:

[0086] The speed of the first fan 11 is obtained.

[0087] In the heating mode of the main machine 1, if the opening degree of the second control valve V2 reaches the minimum opening degree, and the second temperature is greater than the first temperature threshold, the speed of the first fan 11 is controlled to increase.

[0088] That is, the outdoor fresh air intake is the smallest, but the mixed air temperature is still higher than the first temperature threshold, at this time, the speed of the first fan 11 is controlled to increase, the heat exchange efficiency of the first fan 11 and the first heat exchanger 13 is accelerated, and the cold air output of the first fan 11 is increased, so that more cold air is mixed with the outdoor fresh air to reduce the mixed air temperature. Until T2=Tm1, the current speed of the first fan 11 is maintained, so that the first temperature T1 of the first room 3 is gradually lowered to the target temperature Tm1 under the action of the low-temperature mixed air.

[0089] In some embodiments, the hot water machine system 100 comprises a first heat exchanger 13 and a second heat exchanger 14, the first heat exchanger 13 is arranged outdoors, the first fan 11 is arranged on the first heat exchanger 13, the second heat exchanger 14 is arranged in the second room, the refrigerant inlet of the second heat exchanger 14 and the refrigerant outlet of the first heat exchanger 13 are connected by a fifth pipeline G5, and an electronic expansion valve 15 is arranged on the fifth pipeline G5. The control method comprises:

[0090] In the heating mode of the main machine 1, if the opening degree of the second control valve V2 reaches the minimum opening degree, and the second temperature is greater than the first temperature threshold, the opening degree of the electronic expansion valve 15 is controlled to decrease. That is, the outdoor fresh air intake is the smallest, but the mixed air temperature is still higher than the first temperature threshold, at this time, the opening degree of the electronic expansion valve 15 is controlled to decrease, the refrigerant flow rate sucked on the low-pressure side of the compressor 12 is reduced, so that the first heat exchanger 13 has more low-temperature refrigerant to exchange heat with the air, thereby reducing the temperature of the cold air discharged by the first fan 11, and further reducing the mixed air temperature. At the same time, the suction superheat degree of the compressor 12 can also be reduced to ensure the efficiency of the compressor 12, thereby being beneficial to the heating or hot water heating of the unit.

[0091] In some embodiments, the water heater system 100 comprises the heating element 41 arranged at the fresh air inlet 4, and the control method comprises the following steps:

[0092] If the first temperature is less than the second temperature threshold, the first control valve V1 and the second control valve V2 are controlled to be in the open state, and the heating element 41 is controlled to be turned on, when the host 1 is in the cooling mode, wherein the first temperature threshold is less than the second temperature threshold.

[0093] If T1 < Tm2, it indicates that the temperature of the first room 3 is too low at this time, which is not conducive to drying clothes. The first control valve V1 and the second control valve V2 are controlled to be in the open state, the hot air discharged by the first fan 11 is mixed with the outdoor fresh air downstream of the first pipeline G1 to obtain high-temperature mixed air, and the high-temperature mixed air enters the first room 3 from the first pipeline G1 to heat the first room 3, thereby drying the clothes. By recovering the hot air discharged by the host 1 and utilizing the high temperature of the outdoor fresh air, the first room 3 can be heated independently without affecting the normal cooling of other rooms. Compared with the existing air conditioning system for heating the first room 3, the energy consumption of the unit can be reduced, the energy can be saved, and the user experience can be improved.

[0094] In some embodiments, the heating element 41 is arranged in multiple, and the water heater system 100 comprises a second temperature detection device, and the control method comprises the following steps:

[0095] The second temperature of the second end of the first pipeline G1 is obtained.

[0096] In the cooling mode of the host 1, the opening degree of the second control valve V2 and / or the number of the heating element 41 turned on are controlled based on the difference between the second temperature and the second temperature threshold.

[0097] By controlling the opening degree of the second control valve V2 or the number of the heating element 41 turned on, the outdoor fresh air temperature can be adjusted, thereby adjusting the mixed air temperature T2, so that T2 = Tm2.

[0098] Of course, the mixed air temperature T2 can also be adjusted by controlling the opening and closing of the third control valve V3, or the rotating speed of the first fan 11, or the opening degree of the electronic expansion valve 15. For specific working processes, refer to the above embodiments, which will not be described here.

[0099] In some embodiments, the water heater system 100 comprises a water tank 5, a converter 6, a fourth pipeline G4, and a third temperature detection device. The first end of the fourth pipeline G4 is connected with the air outlet of the waste heat collector 2, the second end of the fourth pipeline G4 is connected with the converter 6, the fourth control valve V4 is arranged on the fourth pipeline G4, and the converter 6 is arranged in the water tank 5; the control method comprises:

[0100] The third temperature of the water tank 5 is obtained.

[0101] If the third temperature is less than the third temperature threshold, the fourth control valve V4 is controlled to be in an open state when the host 1 is in the cooling mode.

[0102] When the host 1 is in the cooling mode, if T3 < Tm3, it indicates that there is a hot water demand at this time, the waste heat collector 2 collects the hot air discharged by the first fan 11, the hot air enters the condensing coil of the converter 6 through the four pipelines, and the high-temperature air in the condensing coil exchanges heat with the water in the water tank 5, thereby heating the water stored in the water tank 5. By recovering the hot air discharged by the host 1 for heating water, the normal heating or cooling of other rooms is not affected, thereby reducing the energy consumption of the unit, saving energy, and improving user experience.

[0103] In one example, if (T3-Td) ≥ Tm3, the fourth control valve V4 is maintained in the open state, and since the heat exchange efficiency of the converter 6 is < 100%, Td is the conversion temperature difference calculated according to the efficiency of the converter 6, which is related to the specific model of the heat exchanger and is a fixed value.

[0104] In one example, if (T3-Td) < Tm3, the speed of the first fan 11 is controlled to be increased, thereby increasing the heat exchange efficiency of the first heat exchanger 13 and improving the outlet air temperature of the first fan 11.

[0105] In one example, if the speed of the first fan 11 has reached the maximum speed, but (T3-Td) < Tm3, the opening of the electronic expansion valve 15 is controlled to be reduced, the refrigerant flow on the high-pressure side of the compressor 12 is increased, and the first heat exchanger 13 has more high-temperature refrigerant to exchange heat with the air, thereby increasing the outlet air temperature of the first fan 11.

[0106] It should be noted that if the first room 3 has no cooling demand and no heating demand, and the water tank 5 also has no hot water demand, the third control valve V3 is in the open state, the first control valve V1 and the fourth control valve V4 are in the closed state, and the second control valve V2 is in the minimum opening.

[0107] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order

[0108] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0109] The above description is merely illustrative of the application and not restrictive. Various modifications can be made to the embodiments described without departing from the spirit or scope of the application. Accordingly, the application is not to be restricted based on the specific examples described above, but is to be defined in the terms of the claims presented herein, including the meanings that come to be given to the terms by the courts and the government agencies that have the authority to decide the proper scope of patent claims presented herein.

Claims

1. A water heater system, characterized in that: include: The main unit includes a first fan arranged outdoors; a waste heat collector, arranged at the air outlet of the first fan; a first pipeline, a first end of which is in communication with an air outlet of the waste heat collector, and a second end of which is in communication with a first room, so as to introduce the cold air or hot air recovered by the waste heat collector into the first room, wherein a first control valve is provided upstream of the first pipeline; a second pipeline, a first end of which is connected to the fresh air inlet, a second end of which is connected to the downstream of the first pipeline, the fresh air inlet being used to introduce outdoor fresh air, and a second control valve being provided on the second pipeline; a first temperature detection device, the first temperature detection device being configured to detect a first temperature of the first room; as well as A controller is electrically connected to the first control valve and the second control valve. The controller is configured to control the first control valve and the second control valve to be in an open state when the host is in heating mode and the first temperature of the first room is greater than a first temperature threshold, so that the cold air discharged by the first fan is mixed with the outdoor fresh air and enters the first room from the first pipeline.

2. The water heater system according to claim 1, characterized in that: comprising a second temperature detection device, the second temperature detection device being configured to detect a second temperature of a second end of the first pipeline; The controller is electrically connected to the second temperature detection device, and is configured to control the opening of the second control valve based on the difference between the second temperature of the second end of the first pipeline and the first temperature threshold when the host is in heating mode.

3. The water heater system according to claim 2, characterized in that: The water heater system includes a third pipeline, a first end of the third pipeline is connected to the air outlet of the waste heat collector, a second end of the third pipeline is connected to the outside, and a third control valve is provided on the third pipeline; The controller is electrically connected to the third control valve, and is configured to control the third control valve to be in an open state when the host is in heating mode, the opening of the second control valve is adjusted to the maximum, and the second temperature is lower than the first temperature threshold.

4. The water heater system according to claim 2, characterized in that: The controller is electrically connected to the first fan, and is configured to control the speed of the first fan to increase when the host is in heating mode, the opening of the second control valve reaches the minimum opening, and the second temperature is greater than the first temperature threshold.

5. The water heater system according to claim 2, characterized in that: The water heater system includes a first heat exchanger and a second heat exchanger, wherein the first heat exchanger is arranged outdoors, the first fan is arranged on the first heat exchanger, and the second heat exchanger is arranged in a second room. The refrigerant inlet of the second heat exchanger is connected to the refrigerant outlet of the first heat exchanger via a fifth pipeline, and the fifth pipeline is provided with an electronic expansion valve; The controller is electrically connected to the electronic expansion valve, and is configured to control the opening of the electronic expansion valve to decrease when the host is in heating mode, the opening of the second control valve reaches the minimum opening, and the second temperature is greater than the first temperature threshold.

6. The water heater system according to any one of claims 1 to 5, characterized in that: The fresh air inlet is provided with a heating element, and the controller is electrically connected to the heating element. The controller is configured to, when the host is in cooling mode, control the first control valve and the second control valve to be in an open state if the first temperature is lower than a second temperature threshold, and control the heating element to be turned on, so that the hot air discharged by the first fan is mixed with the outdoor fresh air and then enters the first room from the first pipeline, wherein the first temperature threshold is lower than the second temperature threshold.

7. The water heater system according to claim 6, characterized in that: There are multiple heating elements, and the water heater system includes a second temperature detection device, which is configured to detect a second temperature of the second end of the first pipeline; The controller is electrically connected to the second temperature detection device, and is configured to control the opening of the second control valve and / or the number of openings of the heating element based on the difference between the second temperature and the second temperature threshold when the host is in heating mode.

8. The water heater system according to any one of claims 1 to 5, characterized in that: The device comprises a water tank, a converter, a fourth pipeline, and a third temperature detection device, wherein a first end of the fourth pipeline is connected to the air outlet of the waste heat collector, a second end of the fourth pipeline is connected to the converter, a fourth control valve is provided on the fourth pipeline, and the converter is provided in the water tank; the third temperature detection device is configured to detect a third temperature of the water tank; The controller is electrically connected to the third temperature detection device and the fourth control valve. The controller is configured to, when the host is in cooling mode, control the fourth control valve to be in an open state if the third temperature is less than a third temperature threshold, so that the hot air discharged by the first fan passes through the fourth pipeline through the converter to heat the water stored in the water tank.

9. The water heater system according to claim 5, characterized in that: The water heater system includes a compressor, the refrigerant inlet of the first heat exchanger is connected to the exhaust port of the compressor via a sixth pipeline, the refrigerant outlet of the second heat exchanger is connected to the air inlet of the compressor via a seventh pipeline, and four-way valves are provided on the sixth pipeline and the seventh pipeline; The flow path of the four-way valve is controllably switchably connected between the compressor, the first heat exchanger, and the second heat exchanger to achieve switching of the compressor between a cooling mode and a heating mode.

10. A control method for a water heater system, applied to the water heater system according to any one of claims 1 to 9, characterized in that: The control method includes: Obtaining an operating mode of a host of the water heater system and a first temperature of a first room; When the host is in a heating mode, if the first temperature is greater than a first temperature threshold, the first control valve and the second control valve are controlled to be in an open state.

11. The control method according to claim 10, characterized in that: The water heater system includes a second temperature detection device, and the control method includes: obtaining a second temperature of the second end of the first pipeline; When the host is in a heating mode, the opening degree of the second control valve is controlled based on the difference between the second temperature and the first temperature threshold.

12. The control method according to claim 11, characterized in that: The controlling the opening of the second control valve based on the difference between the second temperature and the first temperature threshold comprises: If the difference between the second temperature and the first temperature threshold is a negative value, controlling the opening of the second control valve to increase; If the difference between the second temperature and the first temperature threshold is a positive value, the opening degree of the second control valve is controlled to decrease.

13. The control method according to claim 11 or 12, characterized in that: The water heater system includes a third pipeline, a first end of the third pipeline is connected to the air outlet of the waste heat collector, a second end of the third pipeline is connected to the outside, and a third control valve is provided on the third pipeline. The control method includes: When the host is in heating mode, if the opening of the second control valve is adjusted to the maximum and the second temperature is lower than the first temperature threshold, the third control valve is controlled to be in an open state.

14. The control method according to claim 11 or 12, characterized in that: include: Obtaining the rotation speed of the first fan; When the host is in heating mode, if the opening of the second control valve reaches the minimum opening and the second temperature is greater than the first temperature threshold, the speed of the first fan is controlled to increase.

15. The control method according to claim 11 or 12, characterized in that: The water heater system includes a first heat exchanger and a second heat exchanger, the first heat exchanger is arranged outdoors, the first fan is arranged on the first heat exchanger, the second heat exchanger is arranged in a second room, a refrigerant inlet of the second heat exchanger is connected to a refrigerant outlet of the first heat exchanger via a fifth pipeline, and an electronic expansion valve is arranged on the fifth pipeline. The control method includes: When the host is in heating mode, if the opening of the second control valve reaches the minimum opening and the second temperature is greater than the first temperature threshold, the opening of the electronic expansion valve is controlled to decrease.

16. The control method according to claim 10, characterized in that: The water heater system includes a heating element provided at a fresh air inlet, and the control method includes: When the host is in cooling mode, if the first temperature is lower than a second temperature threshold, the first control valve and the second control valve are controlled to be in an open state, and the heating element is controlled to be turned on, wherein the first temperature threshold is lower than the second temperature threshold.

17. The control method according to claim 16, characterized in that: The heating element is provided in plurality, the water heater system includes a second temperature detection device, and the control method includes: acquiring a second temperature of a second end of the first pipeline; When the host is in cooling mode, the opening degree of the second control valve and / or the opening quantity of the heating element are controlled based on the difference between the second temperature and the second temperature threshold.

18. The control method according to claim 10, characterized in that: The water heater system includes a water tank, a converter, a fourth pipeline, and a third temperature detection device. The first end of the fourth pipeline is connected to the air outlet of the waste heat collector, the second end of the fourth pipeline is connected to the converter, a fourth control valve is provided on the fourth pipeline, and the converter is provided in the water tank. The control method includes: obtaining a third temperature of the water tank; When the host is in cooling mode, if the third temperature is lower than a third temperature threshold, the fourth control valve is controlled to be in an open state.

Images