Air source heat pump system

Abstract

The utility model provides an air source heat pump system. The air source heat pump system comprises a first heat pump unit; a hot water tank; a buffer water tank; three interfaces of the three-way valve are respectively communicated with a water outlet of the first heat pump unit, a water inlet of the hot water tank and a first inlet of the buffer water tank; an inlet of the water terminal communicates with a first outlet of the buffer water tank, an outlet of the water terminal communicates with a second inlet of the buffer water tank, and a second outlet of the buffer water tank communicates with a water inlet of the first heat pump unit; the second heat pump unit is communicated with the buffer water tank through a heat exchange loop; and the heat pump unit control mechanism is in communication connection with the first heat pump unit, the three-way valve and the second heat pump unit, and the heat pump unit control mechanism is configured to control the first heat pump unit to make hot water and communicate with the hot water tank instead of communicating with the buffer water tank when receiving a hot water making and heating operation instruction, and the second heat pump unit operates in a heating mode. The heating effect can be kept under the condition that the hot water requirement is met, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the field of air source heat pumps, in particular to an air source heat pump system. Background Art

[0002] At present, the common air source heat pump trigeneration system (cooling, heating, domestic hot water) can only meet the needs of one mode at the same time, and cannot meet the needs of the combined mode at the same time, which affects the user experience. The air source heat pump trigeneration system with heat recovery can meet the needs of cooling and domestic hot water in the combined mode at the same time, but cannot meet the needs of heating and domestic hot water at the same time. In low temperature environments, the user experience is reduced. And because the system adds a heat recovery part, the reliability of oil return and other aspects cannot be fully guaranteed, which greatly reduces the life of the equipment. Utility Model Content

[0003] In view of the above problems, the utility model provides an air source heat pump system. By providing a first heat pump unit that can be switched between a hot water tank and a buffer water tank, and a second heat pump unit that is separately connected to the buffer water tank, when receiving the user's hot water making and heating operation instructions, the first heat pump unit operates in domestic hot water mode, and the second heat pump unit operates in heating mode. This can maintain the heating effect while ensuring the hot water demand, thereby improving the user experience.

[0004] The utility model provides an air source heat pump system, comprising:

[0005] The first heat pump unit;

[0006] Hot water tank;

[0007] A buffer water tank having a first inlet, a first outlet, a second inlet and a second outlet;

[0008] A three-way valve, wherein three interfaces of the three-way valve are respectively connected to the water outlet of the first heat pump unit, the water inlet of the hot water tank, and the first inlet of the buffer water tank;

[0009] A water use terminal, wherein the inlet of the water use terminal is connected to the first outlet of the buffer water tank, the outlet of the water use terminal is connected to the buffer water tank, and the second outlet of the buffer water tank is connected to the water inlet of the first heat pump unit;

[0010] The second heat pump unit is connected to the buffer water tank through a heat exchange loop;

[0011] The heat pump unit control mechanism is connected to the first heat pump unit, the three-way valve and the second heat pump unit in communication, and the heat pump unit control mechanism is configured as follows:

[0012] When receiving instructions for hot water production and heating operation, the first heat pump unit is controlled to operate in hot water production mode, and the three-way valve is controlled to switch so that the water outlet of the first heat pump unit is connected to the water inlet of the hot water tank and not connected to the first inlet of the buffer water tank; the second heat pump unit is controlled to operate in heating mode.

[0013] According to the technical solution, a first heat pump unit that can be switched between a hot water tank and a buffer water tank and a second heat pump unit that is independently connected to the buffer water tank are provided. When receiving hot water making and heating operation instructions from the user, the first heat pump unit operates in domestic hot water mode and the second heat pump unit operates in heating mode. This can maintain the heating effect while ensuring the hot water demand, thereby improving the user experience.

[0014] In the optional technical solution of the utility model, the heat pump unit control mechanism is configured as follows:

[0015] When receiving a refrigeration operation instruction, the first heat pump unit is controlled to operate in refrigeration mode, and the three-way valve is controlled to switch so that the water outlet of the first heat pump unit is connected to the first inlet of the buffer water tank and not connected to the water inlet of the hot water tank; the second heat pump unit is controlled to operate in refrigeration mode.

[0016] According to this technical solution, the first heat pump unit and the second heat pump unit cool simultaneously, which is beneficial to improving cooling efficiency and cooling effect and enhancing user experience.

[0017] In the optional technical solution of the utility model, the heat pump unit control mechanism is configured as follows:

[0018] When receiving instructions for hot water production and cooling operation, the first heat pump unit is controlled to operate in heating mode, and the three-way valve is controlled to switch so that the water outlet of the first heat pump unit is connected to the water inlet of the hot water tank and not connected to the first inlet of the buffer water tank; the second heat pump unit is controlled to operate in cooling mode.

[0019] According to this technical solution, the first heat pump unit operates to produce hot water, and the second heat pump unit can supply cold water to the water terminal, thus meeting the user's needs for hot water and cooling, and helping to improve the user experience.

[0020] The optional technical solution of the utility model further includes a water mixing three-way valve, and the three interfaces of the water mixing three-way valve are respectively connected to the first outlet of the buffer water tank, the inlet of the water use terminal and the outlet of the water use terminal.

[0021] According to this technical solution, by mixing the cold water at the outlet of the water terminal with the hot water at the outlet of the buffer water tank, the water temperature entering the inlet of the water terminal can be adjusted to ensure that the water temperature at the inlet of the water terminal meets user needs.

[0022] In the optional technical solution of the utility model, the buffer water tank further includes a third inlet and a third outlet; the heat exchange circuit includes:

[0023] A water outlet branch connected between the water outlet of the second heat pump unit and the third inlet of the buffer water tank;

[0024] The water return branch is connected between the water inlet of the second heat pump unit and the third outlet of the buffer water tank.

[0025] According to the technical solution, the second heat pump unit exchanges heat with the water in the buffer water tank through the water outlet branch and the return water branch, and has a simple structure and is easy to install.

[0026] An optional technical solution of the utility model further includes a water pump, which is arranged on a pipeline connecting the first outlet of the buffer water tank and the inlet of the water terminal.

[0027] According to this technical solution, by setting up a water pump, a driving force can be provided for the circulation of water, which is beneficial to improving the circulation efficiency and improving the cooling or heating effect.

[0028] In an optional technical solution of the present utility model, the number of the first heat pump units is one or more.

[0029] According to this technical solution, the number of first heat pump units can be flexibly set to meet the needs under different working conditions.

[0030] In an optional technical solution of the present utility model, the number of the second heat pump units is one or more.

[0031] According to this technical solution, the number of second heat pump units can be flexibly set to meet the needs under different working conditions.

[0032] In the optional technical solution of the utility model, the water terminal includes a fan coil unit and a floor heating coil unit, so that the type of the water terminal can be flexibly set according to needs.

[0033] In the optional technical solution of the utility model, the heat pump unit control mechanism includes:

[0034] Wire controller;

[0035] The two heat pump unit circuit boards are respectively arranged in the first heat pump unit and the second heat pump unit, and the wire controller is communicatively connected with the two heat pump unit circuit boards.

[0036] According to the technical solution, by connecting the wire controller to the circuit boards of the various heat pump units, centralized control of multiple heat pump units can be achieved, thereby improving the convenience of control. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic structural diagram of an air source heat pump system in an embodiment of the utility model.

[0038] Reference numerals:

[0039] The first heat pump unit 1; the hot water tank 2; the buffer water tank 3; the first inlet 31; the first outlet 32; the second outlet 33; the second inlet 34; the third inlet 35; the third outlet 36; the three-way valve 4; the water terminal 5; the fan coil 51; the floor heating coil 52; the second heat pump unit 6; the wire controller 7; the heat exchange circuit 81; the water outlet branch 811; the return water branch 812; the water pump 82; the solenoid valve 83; the thermostat 84. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] The utility model provides an air source heat pump system, comprising: a first heat pump unit 1, a hot water tank 2, a buffer water tank 3, a three-way valve 4, a water terminal 5, a second heat pump unit 6 and a heat pump unit control mechanism, the buffer water tank 3 has a first inlet 31, a first outlet 32, a second inlet 34 and a second outlet 33, three interfaces of the three-way valve 4 are respectively connected with the water outlet of the first heat pump unit 1, the water inlet of the hot water tank 2, and the first inlet 31 of the buffer water tank 3; the inlet of the water terminal 5 is connected with the first outlet 32 ​​of the buffer water tank 3, the outlet of the water terminal 5 is connected with the second inlet 34 of the buffer water tank 3, and the second outlet 33 of the buffer water tank 3 is connected with the water inlet of the first heat pump unit 1; the second heat pump unit 6 is connected with the buffer water tank 3 through a heat exchange circuit; the heat pump unit control mechanism is connected to the first heat pump unit 1, the three-way valve 4 and the second heat pump unit 6, and the heat pump unit control mechanism is configured as follows:

[0042] When receiving the instructions for hot water production and heating operation, the first heat pump unit 1 is controlled to operate in the (domestic) hot water production mode, and the three-way valve 4 is controlled to switch so that the water outlet of the first heat pump unit 1 is connected to the water inlet of the hot water tank 2 and not connected to the first inlet 31 of the buffer water tank 3; the second heat pump unit 6 is controlled to operate in the heating mode.

[0043] In the above manner, by setting a first heat pump unit 1 that can be switched between the hot water tank 2 and the buffer water tank 3 and a second heat pump unit 6 connected to the buffer water tank 3, when receiving the user's hot water making and heating operation instructions, the first heat pump unit 1 operates in the domestic hot water mode, and the second heat pump unit 6 operates in the heating mode, which can maintain the heating effect while ensuring the hot water demand and improve the user experience.

[0044] In this embodiment, when the water at the outlet of the first heat pump unit 1 is hot water, the first inlet 31 and the first outlet 32 ​​are respectively the hot water inlet and the hot water outlet, and the second inlet 34 is the cold water inlet. When the water at the outlet of the first heat pump unit 1 is cold water, the first inlet 31 and the first outlet 32 ​​are respectively the cold water inlet and the cold water outlet, and the second inlet 34 is the hot water inlet. The buffer water tank 3 is connected to the water inlet of the first heat pump unit 1 through the second outlet 33.

[0045] In this embodiment, the heat pump unit control mechanism can be an integrated circuit chip with signal processing capabilities. The above-mentioned heat pump unit control mechanism can be a general processor, including a central processing unit (CPU), or a single-chip microcomputer, a microcontroller unit (MCU), a complex programmable logic device (CPLD), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), an embedded ARM and other chips. The heat pump unit control mechanism can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present invention. The heat pump unit control structure controls the switching of the three-way valve 4, the operation mode of the first heat pump unit 1 and the operation mode of the second heat pump unit 6 by receiving instructions from the user.

[0046] Specifically, the heat pump unit control mechanism includes a wire controller 7 and two heat pump unit circuit boards (not shown in the figure), the two heat pump unit circuit boards are respectively arranged in the first heat pump unit 1 and the second heat pump unit 6, the wire controller 7 is connected to the heat pump unit circuit boards of the first heat pump unit 1 and the second heat pump unit 6, the first heat pump unit 1 and the second heat pump unit 6 are connected to the three-way valve 4, the water pump 82, etc., the wire controller 7 controls the operation of the first heat pump unit 1 and the second heat pump unit 6, and the first heat pump unit 1 and the second heat pump unit 6 control the switching of the three-way valve 4 and the switch of the water pump 82, etc. according to the instructions sent by the wire controller. In this embodiment, the wire controller 7 is connected to each heat pump unit circuit board, so as to facilitate the centralized control of multiple heat pump units and improve the convenience of control.

[0047] In a preferred embodiment of the present invention, the heat pump unit control mechanism is configured as follows:

[0048] When receiving the instruction of cooling operation, the first heat pump unit 1 is controlled to operate in cooling mode, and the three-way valve 4 is switched to connect the water outlet of the first heat pump unit 1 with the first inlet 31 of the buffer water tank 3 and not connect with the water inlet of the hot water tank 2; the second heat pump unit 6 is controlled to operate in cooling mode. In this embodiment, the first heat pump unit 1 and the second heat pump unit 6 cool at the same time, which is conducive to improving the cooling efficiency and cooling effect, and enhancing the user experience.

[0049] In a preferred embodiment of the present invention, the heat pump unit control mechanism is configured as follows:

[0050] When receiving instructions for hot water production and cooling operation, the first heat pump unit 1 is controlled to operate in hot water production mode, and the three-way valve 4 is controlled to switch so that the water outlet of the first heat pump unit 1 is connected to the water inlet of the hot water tank 2 and not connected to the first inlet 31 of the buffer water tank 3; the second heat pump unit 6 is controlled to operate in cooling mode.

[0051] In the above manner, the first heat pump unit 1 operates to make hot water, and the second heat pump unit 6 can supply cold water to the water terminal, which meets the user's needs for hot water and cooling, and is conducive to improving user experience. Further, after the first heat pump unit 1 completes hot water production, the heat pump unit control mechanism controls the first heat pump unit 1 to operate in cooling mode, and the three-way valve 4 is switched to make the water outlet of the first heat pump unit 1 communicate with the first inlet 31 of the buffer water tank 3, and the second heat pump unit 6 operates in cooling mode. That is, after meeting the demand for hot water production, the first heat pump unit 1 and the second heat pump unit 6 jointly operate in cooling mode to improve cooling efficiency.

[0052] In some embodiments, the heat pump unit control mechanism is configured to: when receiving a hot water making instruction, control the first heat pump unit 1 to operate in a hot water making mode, control the three-way valve 4 to switch so that the water outlet of the first heat pump unit 1 is connected to the first inlet 31 of the buffer water tank 3 and not connected to the water inlet of the hot water tank 2; control the second heat pump unit 6 to standby.

[0053] In the preferred embodiment of the utility model, the buffer water tank 3 further includes a third inlet 35 and a third outlet 36; the heat exchange circuit 81 includes: a water outlet branch 811 and a water return branch 812, the water outlet branch 811 is connected between the water outlet of the second heat pump unit 6 and the third inlet of the buffer water tank 3; the water return branch 812 is connected between the water inlet of the second heat pump unit 6 and the third outlet 33 of the buffer water tank 3. In the above manner, the second heat pump unit 6 exchanges heat with the water in the buffer water tank 3 through the water outlet branch 811 and the water return branch 812, with a simple structure and convenient installation.

[0054] In a preferred embodiment of the present invention, a water pump 82 is further included, which is arranged on a pipeline connecting the first outlet 32 ​​of the buffer water tank 3 and the inlet of the water terminal 5. By providing the water pump 82, a driving force can be provided for the circulation of water, which is conducive to improving the circulation efficiency and the cooling or heating effect.

[0055] In a preferred embodiment of the present invention, the number of the first heat pump units 1 is one or more; when the number of the first heat pump units 1 is multiple, the multiple first heat pump units 1 are arranged in parallel. In this way, the number of the first heat pump units 1 can be flexibly set to meet the needs under different working conditions.

[0056] In a preferred embodiment of the present invention, the number of the second heat pump units 6 is one or more; when the number of the second heat pump units 6 is multiple, the multiple second heat pump units 6 are arranged in parallel. In this way, the number of the second heat pump units 6 can be flexibly set to meet the needs under different working conditions.

[0057] In a preferred embodiment of the utility model, the water terminal 5 includes a fan coil 51 and a floor heating coil 52. Thus, the type of the water terminal 5 can be flexibly set according to needs. Furthermore, the number of the fan coil 51 and the number of the floor heating coil 52 can be one or more, and by setting multiple sets of parallel circulating water circuits between the first outlet 32 ​​and the second inlet 34, water supply to multiple water terminals 5 can be achieved to achieve cooling or heating.

[0058] In some embodiments, solenoid valves 83 are respectively provided at the inlets of the fan coil 51 and the floor heating coil 52. The air source heat pump system also includes a thermostat 84, which is communicatively connected to the solenoid valve 83. The thermostat 84 controls the switch of the inlet of each water use terminal 5 by controlling the solenoid valve 83. Each thermostat 84 is communicatively connected to the first heat pump unit 1 and / or the second heat pump unit 6 to control the opening and closing of the corresponding solenoid valve 83 according to the instructions of the first heat pump unit 1 and / or the second heat pump unit 6, so as to flexibly adjust different water use terminals 5 according to needs to achieve energy saving.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air source heat pump system, characterized in that: include: The first heat pump unit; Hot water tank; A buffer water tank having a first inlet, a first outlet, a second inlet and a second outlet; A three-way valve, wherein three interfaces of the three-way valve are respectively connected to the water outlet of the first heat pump unit, the water inlet of the hot water tank, and the first inlet of the buffer water tank; a water use terminal, wherein the inlet of the water use terminal is communicated with the first outlet of the buffer water tank, the outlet of the water use terminal is communicated with the second inlet of the buffer water tank, and the second outlet of the buffer water tank is communicated with the water inlet of the first heat pump unit; a second heat pump unit, connected to the buffer water tank via a heat exchange loop; The heat pump unit control mechanism is communicatively connected with the first heat pump unit, the three-way valve and the second heat pump unit.

2. The air source heat pump system according to claim 1, characterized in that: It also includes a water mixing three-way valve, and three interfaces of the water mixing three-way valve are respectively connected to the first outlet of the buffer water tank, the inlet of the water use terminal and the outlet of the water use terminal.

3. The air source heat pump system according to claim 1, characterized in that: The buffer water tank also includes a third inlet and a third outlet; The heat exchange circuit comprises: a water outlet branch connected between the water outlet of the second heat pump unit and the third inlet of the buffer water tank; The water return branch is connected between the water inlet of the second heat pump unit and the third outlet of the buffer water tank.

4. The air source heat pump system according to claim 1, characterized in that: It also includes a water pump, which is arranged on a pipeline connecting the first outlet of the buffer water tank and the inlet of the water terminal.

5. The air source heat pump system according to claim 1, characterized in that: The number of the first heat pump units is one or more.

6. The air source heat pump system according to claim 1, characterized in that: The number of the second heat pump units is one or more.

7. The air source heat pump system according to any one of claims 1 to 6, characterized in that: The water-using terminal includes a fan coil and a floor heating coil.

8. The air source heat pump system according to claim 7, characterized in that: The heat pump unit control mechanism comprises: Wire controller; Two heat pump unit circuit boards are respectively arranged in the first heat pump unit and the second heat pump unit, and the wire controller is communicatively connected with the two heat pump unit circuit boards.

Images