Circulating water heat pump system

Abstract

The utility model relates to a circulating water heat pump system which comprises a water source heat pump, a cooling water tower and a boiler, the water source heat pump is arranged in a cooling capacity / heat demand space, and a water outlet of the water source heat pump is communicated with the boiler and the cooling water tower through a water return pipe. A water inlet of the water source heat pump is communicated with the boiler and the cooling water tower through a water inlet pipe; during refrigeration, a pipeline on one side of the cooling water tower and the water source heat pump form a refrigeration circulating water path; during heating, a heating circulating water path is formed between the pipeline on one side of the boiler and the water source heat pump, the system is mainly suitable for areas without underground water or areas deficient in underground water, and the cooling capacity in the cooling water tower or the heat of the boiler can be extracted through the system to form circulating water to supplement the heat and the cooling capacity needed by the water source heat pump system.

Description

Technical Field

[0001] The utility model relates to the technical field of water source heat pumps, in particular to a circulating water heat pump system Background Technique

[0002] Water source heat pumps have many advantages such as high energy efficiency ratio, low investment, low operating cost, good heating and cooling effects, etc. However, for some areas without groundwater or where groundwater extraction is not allowed, sufficient groundwater cannot be used to provide the cooling or heating required for the operation of the water source heat pump. If a long-distance water conveyance scheme is adopted, not only the cost will increase, but also the advantage of the energy efficiency ratio of the water source heat pump cannot be reflected. In view of this problem, the applicant specifically designed this system, and by setting a cooling water tower and a heating device around the water source heat pump, cooling and heating are respectively provided for the operation of the water source heat pump Content of the Utility Model

[0003] The technical problem to be solved by the utility model lies in the water source problem during the application of the water source heat pump in areas without groundwater, with scarce groundwater, or where groundwater extraction is not allowed. In view of the above defects of the prior art, a circulating water heat pump system is provided

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows

[0005] Construct a circulating water heat pump system, including a water source heat pump, a cooling water tower and a boiler. The water source heat pump is arranged in the cooling / heating demand space. The water outlet of the water source heat pump is communicated with the boiler and the cooling water tower through a return pipe, and the water inlet of the water source heat pump is communicated with the boiler and the cooling water tower through a feed pipe; during refrigeration, select the pipeline on the side of the cooling water tower to form a refrigeration circulating water path with the water source heat pump; during heating, select the pipeline on the side of the boiler to form a heating circulating water path with the water source heat pump

[0006] Preferably, the return pipe includes a main return pipe, a first return pipe and a second return pipe. The first end of the main return pipe is communicated with the water outlet of the water source heat pump. The second end of the main return pipe is respectively communicated with the first end of the first return pipe and the first end of the second return pipe through a three-way connector. The second end of the first return pipe is communicated with the water inlet of the boiler, and the second end of the second return pipe is communicated with the water inlet of the cooling water tower

[0007] Preferably, a first valve is arranged between the first end of the main return pipe and the water outlet of the water source heat pump, a second valve is arranged between the second end of the first return pipe and the water inlet of the boiler, and a third valve is arranged between the second end of the second return pipe and the water inlet of the cooling water tower

[0008] Preferably, the water inlet pipe includes a main water inlet pipe, a first water inlet pipe, and a second water inlet pipe. One end of the main water inlet pipe is connected to the water inlet of the water source heat pump, and the other end of the main water inlet pipe is respectively connected to one end of the first water inlet pipe and one end of the second water inlet pipe through a tee joint. The other end of the first water inlet pipe is connected to the water outlet of the boiler, and the other end of the second water inlet pipe is connected to the water outlet of the cooling water tower.

[0009] Preferably, a solenoid valve is provided between one end of the main water inlet pipe and the water inlet of the water source heat pump. A fourth valve is provided between the other end of the first water inlet pipe and the outlet of the filter. A fifth valve is provided between the other end of the second water inlet pipe and the water outlet of the cooling water tower.

[0010] Preferably, when refrigerating, the first valve, the third valve, the fifth valve, and the solenoid valve are all in the open state, and the second valve and the fourth valve are both in the closed state. The low-temperature cooling water in the cooling water tower enters the water source heat pump through the second water inlet pipe and the main water inlet pipe for heat exchange, so as to absorb the internal heat energy of the water source heat pump through the low-temperature cooling water. The inhaled cooling water enters the cooling water tower through the main return pipe and the second return pipe to form a refrigeration cycle water path.

[0011] Preferably, when heating, the third valve and the fifth valve are both in the closed state, and the first valve, the second valve, the fourth valve, and the solenoid valve are all in the open state. The warm water in the boiler enters the water source heat pump through the first water inlet pipe and the main water inlet pipe for heat exchange, so as to transfer the heat to the inside of the water source heat pump through the warm water. The warm water after heat absorption flows back to the boiler through the main return pipe and the first return pipe to form a heating cycle water path.

[0012] Preferably, the water temperature of the water outlet in the cooling water tower is not higher than 25°C, and the water temperature of the water outlet of the boiler is not lower than 25°C.

[0013] Preferably, a circulating water pump is further provided at one end of the first water inlet pipe close to the water outlet of the boiler and at one end of the second water inlet pipe close to the water outlet of the cooling water tower. The circulating water pump is used to form a circulating water source in the refrigeration cycle water path or the heating cycle water path to ensure sufficient water supply for the water source heat pump.

[0014] The beneficial effects of the present utility model are as follows: By arranging a boiler and a cooling water tower at the water source end of the water source heat pump, and connecting them to the water source heat pump in a parallel manner, users can choose the connection method for supplying water to the water source heat pump according to the demand for refrigeration or heating, enabling the water source heat pump to be applicable in areas with scarce or abundant water resources. Moreover, it can avoid the situation of the traditional water source heat pump that requires drilling deep wells and a large amount of water during operation. Therefore, the application of this system can reduce the investment in well drilling, and at the same time, it can avoid the disadvantages of wasting and polluting water resources caused by over-exploiting groundwater, and also avoid land subsidence caused by over-exploiting groundwater. In addition, in such areas, the temperature control effect of this system is better and the operating cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will further illustrate the present utility model in conjunction with the drawings and embodiments. The drawings in the following description are only partial embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings:

[0016] Figure 1 It is a schematic structural diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In order to make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.

[0018] As Figure 1 shown, for the convenience of understanding, the following definitions are made: The end of the water inlet pipe or the water return pipe close to the water source heat pump is the first end, and the other end is the second end; the water return pipe and the water inlet pipe connected to the boiler are the first water return pipe and the first water inlet pipe respectively, and the water return pipe and the water inlet pipe connected to the cooling water tower are the second water return pipe and the second water inlet pipe respectively; the ends of the first water return pipe, the second water return pipe, the first water inlet pipe, and the second water inlet pipe close to the water source heat pump are the first ends, and the other ends are the second ends; the direction of the arrow in the pipeline in the drawing is the water flow direction in the corresponding pipeline during refrigeration or heating.

[0019] A circulating water heat pump system according to a preferred embodiment of the present utility model includes a water source heat pump 1, a cooling water tower 2, and a boiler 3. The water source heat pump 1 is arranged in a cold / heat demand space to blow cold or heat into the demand space, thereby ensuring that the temperature in the space is within a reasonable range. The cooling water tower 2 and the boiler 3 are arranged around the space. The water source heat pump 1 is connected to the cooling water tower 2 and the boiler 3 in the following manner: The outlet of the water source heat pump 1 is connected to the boiler 3 and the cooling water tower 2 through a return water pipe, specifically, the water inlets of the above two parts are connected. The inlet of the water source heat pump 1 is connected to the boiler 3 and the cooling water tower 2 through a feed water pipe, specifically, the water outlets of the above two parts are connected. When using the system as a cold source for refrigeration, the pipeline on the side of the cooling water tower 2 is selected to form a refrigeration cycle water path with the water source heat pump 1. When using the system as a heat source for heating, the pipeline on the side of the boiler 3 is selected to form a heating cycle water path with the water source heat pump 1.

[0020] It should be noted that in order to make the system more environmentally friendly, the boiler 3 can use an environmentally friendly boiler such as a biomass boiler, a gas boiler, or an electric boiler.

[0021] The return water structure in the system is specifically as follows: The return water pipe includes a main return water pipe 40, a first return water pipe 41, and a second return water pipe 42. Among them, the first end of the main return water pipe 40 is connected to the outlet of the water source heat pump 1, and the second end of the main return water pipe 40 is respectively connected to the first end of the first return water pipe 41 and the first end of the second return water pipe 42 through a three-way connector. The second end of the first return water pipe 41 is connected to the water inlet of the boiler 3, and the second end of the second return water pipe 42 is connected to the water inlet of the cooling water tower 2.

[0022] The feed water structure in the system is specifically as follows: The feed water pipe includes a main feed water pipe 50, a first feed water pipe 51, and a second feed water pipe 52. Among them, the first end of the main feed water pipe 50 is connected to the inlet of the water source heat pump 1, and the second end of the main feed water pipe 50 is respectively connected to the first end of the first feed water pipe 51 and the first end of the second feed water pipe 52 through a three-way connector. The second end of the first feed water pipe 51 is connected to the water outlet of the boiler 3, and the second end of the second feed water pipe 52 is connected to the water outlet of the cooling water tower 2.

[0023] In order to prevent the water scale generated by the heating of the boiler 3 from entering the feed water pipe, and at the same time to prevent the impurities in the main feed water pipe 50 from entering the water source heat pump 1, filters are provided at the second end of the first feed water pipe 51 and the first end of the main feed water pipe 50 to filter the impurities in the water flow.

[0024] To facilitate the closing of a certain pipeline and the opening of another pipeline, a first valve 4 is provided between the first end of the main return pipe 40 and the water outlet of the water source heat pump 1. A second valve 5 is provided between the second end of the first return pipe 41 and the water inlet of the boiler 3. A third valve 7 is provided between the second end of the second return pipe 42 and the water inlet of the cooling water tower 2. A solenoid valve 9 is provided between the first end of the main water supply pipe 50 and the water inlet of the water source heat pump 1. A fourth valve 6 is provided between the second end of the first water supply pipe 51 and the water outlet of the boiler 3. A fifth valve 8 is provided between the second end of the second water supply pipe 52 and the water outlet of the cooling water tower 2.

[0025] It should be noted that the second valve 5 and the third valve 7 are not opened or closed simultaneously, that is to say, their states are always opposite, so as to prevent the water circulated from the water source heat pump from entering the boiler 3 or the cooling water tower 2 at the same time. Similarly, the fourth valve 6 and the fifth valve 8 are also always in opposite states. For example, when the fourth valve 6 is in the open state, the fifth valve 8 is in the closed state. In this way, the warmed water discharged from the water outlet of the boiler 3 can only enter the main water supply pipe 50 from the first water supply pipe 51, and will not enter the inside of the cooling water tower 2 from the first water supply pipe 51 through the second water supply pipe 52, ensuring the accuracy of water supply.

[0026] The states of each valve in the refrigeration or heating state are as follows:

[0027] When refrigerating, the first valve 4, the third valve 7, the fifth valve 8 and the solenoid valve 9 are all in the open state, and the second valve 5 and the fourth valve 6 are all in the closed state; the low-temperature cooling water in the cooling water tower 2 enters the water source heat pump 1 through the second water supply pipe 52 and the main water supply pipe 50 for heat exchange, so as to absorb the internal heat energy of the water source heat pump 1 through the low-temperature cooling water. The cooling water after absorbing the heat inside the water source heat pump 1 enters the cooling water tower 2 through the main return pipe 40 and the second return pipe 42 to form a refrigeration cycle water path;

[0028] When heating, the third valve 7 and the fifth valve 8 are both in the closed state, and the first valve 4, the second valve 5, the fourth valve 6 and the solenoid valve 9 are all in the open state; the warmed water in the boiler 3 enters the water source heat pump 1 through the first water supply pipe 51 and the main water supply pipe 50 for heat exchange, so as to transfer the heat to the inside of the water source heat pump 1 through the warmed water. The warmed water after absorbing the heat flows back to the boiler 3 through the main return pipe 40 and the first return pipe 41 to form a heating cycle water path.

[0029] To ensure the refrigeration and heating effects of the water source heat pump, the water temperature at the water outlet of the cooling water tower 2 is not higher than 25°C, and the water temperature at the water outlet of the boiler 3 is not lower than 25°C.

[0030] To ensure that the external water source can smoothly enter the water source heat pump 1 and form a cycle, a circulation pump is also provided at one end of the first water inlet pipe 51 close to the water outlet of the boiler 3 and at one end of the second water inlet pipe 52 close to the water outlet of the cooling water tower 2. The circulation pump serves as the power source for the water circulation. This circulation pump is used to form a circulating water source in the refrigeration cycle water circuit or the heating cycle water circuit to ensure sufficient water supply for the water source heat pump.

[0031] It should be understood that the present utility model is described through some embodiments. Those skilled in the art know that, without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A circulating water heat pump system, comprising a water source heat pump, a cooling water tower and a boiler, characterized in that: The water source heat pump is arranged in the cooling / heating demand space, the water outlet of the water source heat pump is connected with the boiler and the cooling water tower through the return pipe, and the water inlet of the water source heat pump is connected with the boiler and the cooling water tower through the inlet pipe; when cooling, the pipeline on one side of the cooling water tower is selected to form a cooling circulation water circuit with the water source heat pump; when heating, the pipeline on one side of the boiler and the water source heat pump are selected to form a heating circulation water circuit.

2. A circulating water heat pump system according to claim 1, characterized in that: The return water pipe includes a main return water pipe, a first return water pipe and a second return water pipe. The first end of the main return water pipe is connected to the water outlet of the water source heat pump, and the second end of the main return water pipe is connected to the first end of the first return water pipe and the first end of the second return water pipe through a three-way connector, respectively. The second end of the first return water pipe is connected to the water inlet of the boiler, and the second end of the second return water pipe is connected to the water inlet of the cooling tower.

3. A circulating water heat pump system according to claim 2, characterized in that: A first valve is arranged between the first end of the main return pipe and the water outlet of the water source heat pump, a second valve is arranged between the second end of the first return pipe and the water inlet of the boiler, and a third valve is arranged between the second end of the second return pipe and the water inlet of the cooling tower.

4. A circulating water heat pump system according to claim 3, characterized in that: The water inlet pipe includes a main water inlet pipe, a first water inlet pipe and a second water inlet pipe, wherein the first end of the main water inlet pipe is connected to the water inlet of the water source heat pump, the second end of the main water inlet pipe is connected to the first end of the first water inlet pipe and the first end of the second water inlet pipe respectively through a three-way connector, the second end of the first water inlet pipe is connected to the water outlet of the boiler, and the second end of the second water inlet pipe is connected to the water outlet of the cooling tower.

5. A circulating water heat pump system according to claim 4, characterized in that: An electromagnetic valve is arranged between the first end of the main water inlet pipe and the water inlet of the water source heat pump, a fourth valve is arranged between the second end of the first water inlet pipe and the filter outlet, and a fifth valve is arranged between the second end of the second water inlet pipe and the water outlet of the cooling water tower.

6. A circulating water heat pump system according to claim 5, characterized in that: When cooling, the first valve, the third valve, the fifth valve and the solenoid valve are all in the open state, and the second valve and the fourth valve are all in the closed state; the low-temperature cooling water in the cooling water tower enters the water source heat pump through the second water inlet pipe and the main water inlet pipe for heat exchange, so that the internal heat energy of the water source heat pump is absorbed by the low-temperature cooling water, and the cooling water after absorption enters the cooling water tower through the main return water pipe and the second return water pipe to form a refrigeration circulation water circuit.

7. A circulating water heat pump system according to claim 6, characterized in that: When heating, the third valve and the fifth valve are in the closed state, and the first valve, the second valve, the fourth valve and the solenoid valve are in the open state; the heated water in the boiler enters the water source heat pump through the first water inlet pipe and the main water inlet pipe for heat exchange, so as to transfer heat to the water source heat pump through the heated water, and the heated water after absorbing heat flows back to the boiler through the main return pipe and the first return pipe to form a heating circulation water circuit.

8. A circulating water heat pump system according to claim 7, characterized in that: The water temperature at the water outlet of the cooling water tower is not higher than 25°C, and the water temperature at the water outlet of the boiler is not lower than 25°C.

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