Central heating system and water source heat pump coupled heating device

Abstract

A central heating system and water source heat pump coupling heating device comprises a heating water supply pipe, a heating water return pipe, a water source heat pump system, an indoor water supply pipe, an indoor water return pipe and a heating tail end, and the water source heat pump system comprises a compressor, a first double-flow-channel heat exchanger, a second double-flow-channel heat exchanger and an electronic expansion valve. The heating water supply pipe, the first waterway, the heating tail end, the second waterway and the heating water return pipe are sequentially communicated to form a water source heat pump mode; the heating water supply pipe, the indoor water supply pipe, the heating tail end, the indoor water return pipe and the heating water return pipe form a self-heating mode; and a self-heating mode and a water source heat pump mode are switched. Through the arrangement of the first double-flow-channel heat exchanger and the second double-flow-channel heat exchanger, the central heating system and the water source heat pump system are coupled together and cooperate with each other, the return water temperature is fully utilized, the water source heat pump system saves energy, and the indoor temperature is further increased; a water source heat pump mode and a self-heating mode can be switched.

Description

Technical Field

[0001] This invention relates to residential central heating systems. Background Technology

[0002] The existing technology, Chinese patent 202410794845.6, describes an indoor return water heating enhancement machine for centralized heating, which includes a water supply pipeline, a return water pipeline, a heating terminal, and a water source heat pump heating unit. The heating terminal includes a manifold and at least one sub-heating terminal. The water supply pipeline and the return water pipeline are respectively connected to the inlet and return water ends of the heating terminal. The water heat exchanger section of the water-side heat exchanger is connected in series or parallel to the pipeline at the return water end of the heating terminal; or the heating terminal includes several sub-heating terminals, which are respectively connected to the water supply pipeline and the return water pipeline. The water heat exchanger section is connected in series or parallel to the return water pipeline. One sub-heating terminal and one water source heat pump heating unit constitute a group. The return water pipe at the heating terminal of the centralized heating system is connected to the water source heat exchanger of the water source heat pump heating unit. When the indoor temperature drops, or the system pressure is low and circulation is slow, causing a drop in indoor temperature, the water source heat pump heating unit operates, absorbing the heat energy from the return water in the return pipe to supplement the indoor temperature by either raising or maintaining it. The problem is that the water source heat pump system and the centralized heating system are not coupled together. Summary of the Invention

[0003] The purpose of this invention is to provide a combined heating device for a centralized heating system and a water source heat pump, which features the integration of a centralized heating system and a water source heat pump and can be converted between them.

[0004] This invention is implemented as follows: a centralized heating system and a water source heat pump coupled heating device, characterized in that it includes a heating water supply pipe, a heating return pipe, a water source heat pump system, an indoor water supply pipe, an indoor return pipe, and heating terminals.

[0005] The water source heat pump system includes a compressor, a first dual-channel heat exchanger, a second dual-channel heat exchanger, and an electronic expansion valve. The first dual-channel heat exchanger includes a first water path and a first refrigerant path that serves as a condenser. The second dual-channel heat exchanger includes a second water path and a second refrigerant path that serves as an evaporator.

[0006] The heating water supply pipe, the first water circuit, the heating terminal, the second water circuit, and the heating return water pipe are connected in sequence to form a water source heat pump mode;

[0007] The heating water supply pipe, indoor water supply pipe, heating terminal, indoor return water pipe and heating return water pipe constitute a self-heating mode;

[0008] Switching between self-heating mode and water source heat pump mode.

[0009] The special feature of the centralized heating system and water source heat pump coupled heating device is that:

[0010] It also includes a first three-way valve and a second three-way valve;

[0011] The heating water supply pipe is connected to the inlet of the first water circuit and the inlet of the indoor water supply pipe through the first three-way valve, and the outlet of the indoor water supply pipe is connected to the pipes of the first water circuit and the heating terminal.

[0012] The inlet of the heating return water pipe is connected to the pipeline between the second water circuit and the heating terminal through the second three-way valve, and the indoor return water pipe is connected to the heating return water pipe.

[0013] The self-heating mode and the water source heat pump mode can be switched synchronously by the first three-way valve and the second three-way valve.

[0014] The aforementioned centralized heating system and water source heat pump coupled heating device are characterized in that they further include a first flow guiding device and a second flow guiding device.

[0015] The first flow guiding device includes a first one-way valve and a first tee fitting.

[0016] The first water passage, the inlet end of the first one-way valve, the straight pipe of the first tee fitting, and the heating terminal are connected in sequence, and the indoor water supply pipeline is connected to the branch pipe of the first tee fitting.

[0017] The second flow guiding device includes a second one-way valve and a second tee fitting.

[0018] The second water outlet, the inlet pipe of the second one-way valve, the straight pipe of the second fitting, and the heating return pipe are connected in sequence, and the indoor return pipe is connected to the branch pipe.

[0019] The special feature of the centralized heating system and water source heat pump coupled heating device is that:

[0020] During operation, (I) in the water source heat pump mode, the heating water supply pipe, the first three-way valve, the first water circuit, the heating terminal, the second three-way valve, the second water circuit and the heating return pipe are connected in sequence to circulate heating;

[0021] In the water source heat pump mode, (1) the water source heat pump system is working, the first refrigerant pipe acts as the condenser, and the second refrigerant pipe acts as the evaporator;

[0022] (2) The water source heat pump system stops working and self-circulation heating is used.

[0023] (ii) Self-heating mode, the heating water supply pipe, the first three-way valve, the indoor water supply pipe, the heating terminal, the indoor return water pipe and the heating return water pipe are connected in sequence.

[0024] This invention provides a heating device that couples a centralized heating system and a water source heat pump. The arrangement of a first dual-channel heat exchanger and a second dual-channel heat exchanger allows the centralized heating system and the water source heat pump system to be coupled together and work in synergy. This fully utilizes the return water temperature, saves energy in the water source heat pump system, and also increases the indoor temperature. The water source heat pump mode and self-heating mode can be switched. Attached Figure Description

[0025] Figure 1 This is the front view of the present invention. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] like Figure 1 As shown, a centralized heating system and a water source heat pump coupled heating device include a heating water supply pipe 11, a heating return water pipe 12, a water source heat pump system 2, an indoor water supply pipe 31, an indoor return water pipe 32, and a heating terminal 4.

[0029] The water source heat pump system 2 includes a compressor 21, a first dual-channel heat exchanger 22, a second dual-channel heat exchanger 23, and an electronic expansion valve 24. The first dual-channel heat exchanger 22 includes a first water path and a first refrigerant path that serves as a condenser. The second dual-channel heat exchanger 23 includes a second water path and a second refrigerant path that serves as an evaporator.

[0030] The heating water supply pipe 11, the first water circuit of the first dual-channel heat exchanger 22, the heating terminal 4, the second water circuit of the second dual-channel heat exchanger 23, and the heating return water pipe 12 are connected in sequence to form a water source heat pump mode.

[0031] The heating water supply pipe 11, the indoor water supply pipe 31, the heating terminal 4, the indoor return water pipe 32, and the heating return water pipe 12 constitute a self-heating mode;

[0032] Switching between self-heating mode and water source heat pump mode.

[0033] As a further improvement of this utility model, it also includes a first three-way valve 51 and a second three-way valve 52;

[0034] The first three-way valve 51 and the second three-way valve 52 can be manual two-position three-way valves or electric two-position three-way valves;

[0035] The heating water supply pipe 11 is connected to the inlet of the first water circuit and the inlet of the indoor water supply pipe 31 through the first three-way valve 51, and the outlet of the indoor water supply pipe 31 is connected to the pipeline between the first water circuit and the heating terminal 4.

[0036] The inlet of the heating return water pipe 12 is connected to the pipeline between the second water circuit and the heating terminal 4 through the second three-way valve 52, and the indoor return water pipe 32 is connected to the heating return water pipe 12.

[0037] The self-heating mode and the water source heat pump mode can be switched synchronously by the first three-way valve 51 and the second three-way valve 52.

[0038] During operation, (I) in water source heat pump mode, the heating water supply pipe 11, the first three-way valve 51, the first water circuit, the heating terminal 4, the second three-way valve 52, the second water circuit and the heating return water pipe 12 are connected in sequence to circulate heating.

[0039] In the water source heat pump mode, (1) the water source heat pump system 2 is working, the first refrigerant pipe acts as a condenser, and the second refrigerant pipe acts as an evaporator; in this working state, the water source hot water system 2 uses the water temperature of the return water pipe to play an energy-saving and consumption-reducing role. In the event of a fault in the central heating system, or a low water temperature in the central heating system, or in extreme weather conditions, or when the indoor temperature needs to be raised, the water source heat pump system 2 will work;

[0040] (2) Water source heat pump system 2 stops working and self-circulates for heating. When the central heating system is providing heating normally and the outdoor temperature is high, and the indoor temperature is maintained at a comfortable level, it self-circulates for heating in water pump heat pump mode.

[0041] (ii) Self-heating mode, the heating water supply pipe 11, the first three-way valve 51, the indoor water supply pipe 31, the heating terminal 4, the indoor return water pipe 32 and the heating return water pipe 12 are connected in sequence.

[0042] When the central heating system is in normal working order, the water source heat pump system stops, reducing wear and tear and extending its service life.

[0043] As a further improvement of this utility model, it also includes a first flow guiding device 61 and a second flow guiding device 62.

[0044] The first flow guiding device 61 includes a first one-way valve 611 and a first tee fitting 612.

[0045] The first water passage, the inlet end of the first one-way valve 611, the straight pipe of the first tee fitting 612 and the heating terminal 4 are connected in sequence, and the indoor water supply pipe 31 is connected to the branch pipe of the first tee fitting 612.

[0046] The second flow guiding device 62 includes a second one-way valve 621 and a second tee fitting 622.

[0047] The second water outlet, the second one-way valve 621 inlet, the straight pipe of the second tee fitting 622 and the heating return pipe 12 are connected in sequence, and the indoor return pipe 32 is connected to the branch pipe of the second tee fitting 622.

[0048] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A centralized heating system and a water source heat pump coupled heating device, characterized in that: This includes heating water supply pipes, heating return pipes, water source heat pump systems, indoor water supply pipes, indoor return pipes, and heating terminals. The water source heat pump system includes a compressor, a first dual-channel heat exchanger, a second dual-channel heat exchanger, and an electronic expansion valve. The first dual-channel heat exchanger includes a first water path and a first refrigerant path that serves as a condenser. The second dual-channel heat exchanger includes a second water path and a second refrigerant path that serves as an evaporator. The heating water supply pipe, the first water circuit, the heating terminal, the second water circuit, and the heating return water pipe are connected in sequence to form a water source heat pump mode; The heating water supply pipe, indoor water supply pipe, heating terminal, indoor return water pipe and heating return water pipe constitute a self-heating mode; Switching between self-heating mode and water source heat pump mode.

2. The centralized heating system and water source heat pump coupled heating device according to claim 1, characterized in that: It also includes a first three-way valve and a second three-way valve; The heating water supply pipe is connected to the inlet of the first water circuit and the inlet of the indoor water supply pipe through the first three-way valve, and the outlet of the indoor water supply pipe is connected to the pipeline between the first water circuit and the heating terminal. The inlet of the heating return water pipe is connected to the pipeline between the second water circuit and the heating terminal through the second three-way valve, and the indoor return water pipe is connected to the heating return water pipe. The self-heating mode and the water source heat pump mode can be switched synchronously by the first three-way valve and the second three-way valve.

3. A centralized heating system and a water source heat pump coupled heating device according to claim 1 or 2, characterized in that: It also includes a first flow guiding device and a second flow guiding device. The first flow guiding device includes a first one-way valve and a first tee fitting. The first water passage, the inlet end of the first one-way valve, the straight pipe of the first tee fitting, and the heating terminal are connected in sequence, and the indoor water supply pipe is connected to the branch pipe of the first tee fitting. The second flow guiding device includes a second one-way valve and a second tee fitting. The second water outlet, the inlet pipe of the second one-way valve, the straight pipe of the second fitting, and the heating return pipe are connected in sequence, and the indoor return pipe is connected to the branch pipe.

4. The centralized heating system and water source heat pump coupled heating device according to claim 2, characterized in that: During operation, (I) in the water source heat pump mode, the heating water supply pipe, the first three-way valve, the first water circuit, the heating terminal, the second three-way valve, the second water circuit and the heating return pipe are connected in sequence to circulate heating; In the water source heat pump mode, (1) the water source heat pump system is working, the first refrigerant pipe acts as the condenser, and the second refrigerant pipe acts as the evaporator; (2) The water source heat pump system stops working and self-circulation heating is used. (ii) Self-heating mode, the heating water supply pipe, the first three-way valve, the indoor water supply pipe, the heating terminal, the indoor return water pipe and the heating return water pipe are connected in sequence.

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