Self-cleaning mechanism for pipeline filter of air source heat pump unit

Abstract

The utility model relates to a self-cleaning mechanism for a pipeline filter of an air source heat pump unit, which is characterized by comprising a filtering water inlet pipeline, a filtering water outlet pipeline, a diversion pipeline, a shunting pipeline, a confluence pipeline, a backwashing pipeline, a washing water storage tank, a recovery pipeline and a washing pipeline, a first switch valve is arranged at the joint of the filtering water inlet pipeline and the shunting pipeline, the filtering water outlet pipeline is communicated with the confluence pipeline, a second switch valve is arranged at the joint of the filtering water outlet pipeline and the confluence pipeline, and the number of the backwashing pipelines is two. According to the utility model, the two backwashing pipelines are arranged, and the other backwashing pipeline can be used for continuously filtering when one backwashing pipeline is used for backwashing by controlling the switch valve, so that the machine does not need to stop for waiting, and the effect of increasing the practical performance is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of air source heat pumps, in particular to a self-cleaning mechanism for a pipeline filter of an air source heat pump unit. Background Art

[0002] An air source heat pump is an energy-saving device that uses high-level energy to transfer heat from a low-level heat source, air, to a high-level heat source. It is a form of heat pump. As the name implies, a heat pump, like a pump, can convert low-level heat energy that cannot be directly utilized, such as the heat contained in air, soil, and water, into usable high-level heat energy, thereby saving some high-level energy, such as coal, gas, oil, and electricity. Existing air source heat pump central heating systems must be shut down for filter cleaning. Installing a backwash filter increases the labor involved in the filter cleaning process, increasing the investment in manpower and machinery, and causing unnecessary downtime, which affects the user experience. Summary of the Invention

[0003] In order to solve the above problems, the utility model designs a self-cleaning mechanism for the pipe filter of an air source heat pump unit. Two backwash pipes are set. By controlling the switch valve, when backwashing is carried out in one backwash pipe, the other backwash pipe can be used to continue filtering without stopping and waiting, which increases the practical performance.

[0004] In order to solve the above technical problems, the utility model provides a self-cleaning mechanism for the pipe filter of an air source heat pump unit, which is characterized by comprising a filtered water inlet pipe, a filtered water outlet pipe, a diversion pipe, a merging pipe, a backwash pipe, a flushing water tank, a recovery pipe and a flushing pipe, the filtered water inlet pipe is connected to the shunt pipe, a first switch valve is provided at the connection between the filtered water inlet pipe and the shunt pipe, the filtered water outlet pipe is connected to the merging pipe, a second switch valve is installed at the connection between the filtered water outlet pipe and the merging pipe, the two ends of the diversion pipe are respectively connected to the filtered water inlet pipe and the filtered water outlet pipe, a third switch valve is installed on the diversion pipe, two backwash pipes are provided, and the two One end of each backwash pipe is connected to the diversion pipe through the first diversion branch pipe, and the fourth switch valve is installed on the first diversion branch pipe. The other ends of the two backwash pipes are connected to the confluence pipe through the second diversion branch pipe, and the fifth switch valve is installed on the second diversion branch pipe. The flushing water tank is connected to one end of the flushing pipe through the flushing pump, and the flushing pipe is connected to the two second diversion branches through the third diversion branch pipe and the fourth diversion branch pipe respectively. The sixth switch valve is installed on the third diversion branch pipe and the fourth diversion branch pipe. The recovery pipe is connected to the two first diversion branches through the fifth diversion branch pipe and the sixth diversion branch pipe respectively, and the seventh switch valve is installed on the fifth diversion branch pipe and the sixth diversion branch pipe.

[0005] Furthermore: the recovery pipe is connected to the flushing wastewater recovery tank, and the flushing wastewater recovery tank is connected to the solid-liquid separator.

[0006] Furthermore: a filter cartridge is provided in the backwash pipe, one end of the filter cartridge is sealed, the other end of the filter cartridge is connected to the converging pipe, and the diverting pipe is connected to the inner space of the backwash pipe outside the filter cartridge.

[0007] Going further: the flushing pipeline is also connected to the pressure switching valve, which is a one-way valve, connected to the recovery pipeline through a pressure relief pipeline. The pressure switching valve is composed of an outer valve body, an inner valve body, a valve core, a spring and an end cover. The end cover is detachably installed in the open end of the outer valve body, and the inner valve body is fixed in the outer valve body. The inner valve body is piston-connected to the end of the end of the end cover with a valve core, and the valve core is connected to the end cover through a spring. A leakage hole is provided on the side wall of the inner valve body facing the end cover, and the leakage hole is sealed by the valve core. The end of the inner valve body away from the end cover is connected to the flushing pipeline.

[0008] After adopting the above structure, the beneficial effects of the utility model are as follows:

[0009] 1. The utility model is provided with two backwash pipes. By controlling the switch valve, when one backwash pipe is backwashing, the other backwash pipe can be used to continue filtering without stopping and waiting, which plays a role in increasing practical performance.

[0010] 2. When the backwash pipe is blocked and backwashing cannot be performed, the pressure switch valve will automatically open during the flushing process to relieve pressure and divert the flow. This structure plays a self-protection role and prevents unnecessary damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0012] Figure 1 It is a structural diagram of the present utility model.

[0013] Figure 2 This is the internal structure diagram of the pressure switch valve. DETAILED DESCRIPTION

[0014] like Figure 1The self-cleaning mechanism of the pipe filter of an air source heat pump unit shown in the figure includes a filter water inlet pipe 1, a filter water outlet pipe 2, a diversion pipe 3, a diversion pipe 11, a confluence pipe 12, a backwash pipe 7, a flushing water tank 13, a recovery pipe 19 and a flushing pipe 18. The filter water inlet pipe is connected to the diversion pipe, and a first switch valve 4 is provided at the connection between the filter water inlet pipe and the diversion pipe. The filter water outlet pipe is connected to the confluence pipe, and a second switch valve 5 is installed at the connection between the filter water outlet pipe and the confluence pipe. The two ends of the diversion pipe are respectively connected to the filter water inlet pipe and the filter water outlet pipe. A third switch valve 6 is installed on the diversion pipe. Two backwash pipes are provided, and the two backwash pipes One end of each backwash pipe is connected to the diversion pipe via a first diversion branch pipe, and a fourth switch valve 8 is installed on the first diversion branch pipe. The other ends of the two backwash pipes are connected to the confluence pipe via a second diversion branch pipe, and a fifth switch valve 9 is installed on the second diversion branch pipe. The flushing water storage tank is connected to one end of the flushing pipe via a flushing pump 17. The flushing pipe is connected to the two second diversion branches via a third diversion branch pipe and a fourth diversion branch pipe, respectively. The third and fourth diversion branches are both installed with a sixth switch valve 10. The recovery pipe is connected to the two first diversion branches via a fifth and sixth diversion branch pipe, respectively. The fifth and sixth diversion branches are both installed with a seventh switch valve 20. The utility model is provided with two backwash pipes. By controlling the switch valve, filtration can continue in the other backwash pipe while backwashing is in progress, eliminating the need for downtime and waiting, thereby increasing practical performance.

[0015] like Figure 1 The recovery pipe shown is connected to the flushing wastewater recovery tank 14, and the flushing wastewater recovery tank is connected to the solid-liquid separator.

[0016] A filter cartridge is provided in the backwash pipe. One end of the filter cartridge is sealed, and the other end of the filter cartridge is connected to the converging pipe. The diverting pipe is connected to the inner space of the backwash pipe outside the filter cartridge.

[0017] like Figure 2The flushing pipeline shown is also connected to a pressure switch valve 15. The pressure switch valve is a one-way valve that is connected to the recovery pipeline via a pressure relief pipeline 16. The pressure switch valve comprises an outer valve body 15-1, an inner valve body 15-2, a valve core 15-4, a spring 15-5, and an end cap 15-3. The end cap is removably mounted on the open end of the outer valve body. The inner valve body is fixed within the outer valve body. The end of the inner valve body facing the end cap is piston-connected to the valve core. The valve core is connected to the end cap via a spring. A drain hole 15-2-1 is formed in the side wall of the inner valve body facing the end cap. The drain hole is sealed by the valve core. The end of the inner valve body away from the end cap is connected to the flushing pipeline. If the backwash pipeline is blocked and backwashing cannot be performed, the pressure switch valve will automatically open during the flushing process to relieve pressure and divert the flow. This structure provides self-protection and prevents unnecessary damage.

[0018] The above are only preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be pointed out that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A self-cleaning mechanism for a pipe filter of an air source heat pump unit, characterized by: The invention comprises a filter water inlet pipe (1), a filter water outlet pipe (2), a diversion pipe (3), a diversion pipe (11), a confluence pipe (12), a backwash pipe (7), a flushing water storage tank (13), a recovery pipe (19) and a flushing pipe (18), wherein the filter water inlet pipe is connected to the diversion pipe, a first switch valve (4) is provided at the connection between the filter water inlet pipe and the diversion pipe, the filter water outlet pipe is connected to the confluence pipe, a second switch valve (5) is provided at the connection between the filter water outlet pipe and the confluence pipe, the two ends of the diversion pipe are respectively connected to the filter water inlet pipe and the filter water outlet pipe, a third switch valve (6) is provided on the diversion pipe, and two backwash pipes are provided, one end of each of the two backwash pipes is connected to the filter water inlet pipe and the filter water outlet pipe. The first diversion branch pipe is connected to the diversion pipe, the first diversion branch pipe is provided with a fourth switch valve (8), the other ends of the two backwash pipes are connected to the converging pipe through the second diversion branch pipe, the second diversion branch pipe is provided with a fifth switch valve (9), the flushing water storage tank is connected to one end of the flushing pipe through a flushing pump (17), the flushing pipe is connected to the two second diversion branches through the third diversion branch pipe and the fourth diversion branch pipe respectively, the third diversion branch pipe and the fourth diversion branch pipe are provided with a sixth switch valve (10), the recovery pipe is connected to the two first diversion branches through the fifth diversion branch pipe and the sixth diversion branch pipe respectively, and the fifth diversion branch pipe and the sixth diversion branch pipe are provided with a seventh switch valve (20).

2. The self-cleaning mechanism for the pipe filter of an air source heat pump unit according to claim 1, characterized in that: The recovery pipe is connected to the flushing wastewater recovery tank (14), and the flushing wastewater recovery tank is connected to the solid-liquid separator.

3. The self-cleaning mechanism for the pipe filter of an air source heat pump unit according to claim 1, characterized in that: A filter cartridge is provided in the backwash pipe, one end of the filter cartridge is sealed, the other end of the filter cartridge is connected to the converging pipe, and the diverting pipe is connected to the inner space of the backwash pipe outside the filter cartridge.

4. The self-cleaning mechanism for the pipe filter of an air source heat pump unit according to claim 1, characterized in that: The flushing pipeline is also connected to the pressure switching valve (15). The pressure switching valve is a one-way valve, which is connected to the recovery pipeline through a pressure relief pipeline (16). The pressure switching valve is composed of an outer valve body (15-1), an inner valve body (15-2), a valve core (15-4), a spring (15-5) and an end cover (15-3). The end cover is detachably mounted on the open end of the outer valve body. The inner valve body is fixed in the outer valve body. The inner valve body is connected to the end cover in a piston-like manner with the valve core. The valve core is connected to the end cover through a spring. A leakage hole (15-2-1) is provided on the side wall of the inner valve body facing the end cover. The leakage hole is sealed by the valve core. The end of the inner valve body away from the end cover is connected to the flushing pipeline.

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