CN114322306A - System for preparing domestic hot water by combining bath wastewater source and ground source - Google Patents

Abstract

The invention discloses a system for preparing domestic hot water by combining a bathing wastewater source and a ground source, wherein a water inlet end A and a water inlet end B, and a water outlet end A and a water outlet end B of a heat exchanger are correspondingly communicated with a clear water inlet pipe A and a wastewater outlet pipe, a clear water primary heat pipe and a wastewater primary cooling pipe, the clear water primary heat pipe is communicated with a condensation water inlet end A, the condensation water outlet end A is communicated with a condensation water inlet end B through the clear water primary heat pipe, the condensation water outlet end B is communicated with a hot water storage tank, the wastewater primary cooling pipe is communicated with an evaporation water inlet end A, the evaporation water outlet end A is communicated with an evaporation water inlet end B through the wastewater primary cooling pipe, and the evaporation water outlet end B is communicated with a wastewater drain pipe; the clear water inlet pipe A is communicated with the electromagnetic valve A and the buried pipe A in parallel, and the waste water intermediate cooling pipe is communicated with the electromagnetic valve B and the buried pipe B in parallel. According to the structure, the system for preparing the domestic hot water by combining the bath wastewater source and the ground source can prepare the bath hot water and all the domestic hot water required by washing vegetables, washing hands and washing faces in a kitchen and a toilet by using the bath wastewater.

Description

System for producing domestic hot water by combining bath waste water source and ground source

technical field

The invention relates to the technical field of recovering and utilizing waste heat for energy-saving production of domestic hot water, in particular to a system for preparing domestic hot water by combining a bathing wastewater source and a ground source.

Background technique

The applicant has previously applied and submitted a patent with application number 201910362566.1, which cleverly combines the bathing wastewater source with the ground source, and obtains hot water for bathing by heating the bathing wastewater at a ratio of 1:1, with good heating effect and low energy consumption. However, in the actual use process, it is found that the three seasons of the year can operate normally, but in winter, the use effect is relatively poor. The study found that because the temperature of tap water in winter is lower than that of the other three seasons, and the temperature required for hot water for bathing is also slightly higher than that of the other three seasons, the temperature rise required to heat water to hot water is higher than that of the other three seasons. The remaining three seasons are higher, which leads to the fact that the temperature of the final effluent cannot meet the bathing requirements. In addition, in addition to bathing in winter, there are other rigid demands for domestic hot water, and the consumption of domestic hot water exceeds the discharge of bathing wastewater.

Simply using the above patented system to produce domestic hot water from bathing wastewater, when the temperature of tap water is particularly low in severe winter, even if the heat in the bathing wastewater is recovered to the maximum extent, it cannot meet the demand for the temperature rise of domestic hot water, and auxiliary heating must be used. Although the auxiliary heating accounts for a small proportion of the total heating, it still brings more inconvenience to the overall operation and significantly reduces the performance coefficient of the system. For example, electric auxiliary heat will seriously increase the overall operating energy consumption of the equipment, and an additional set of electric auxiliary heat equipment needs to be added for operation and maintenance, which increases additional costs; ordinary ground source heat pump systems require a large number of buried pipes during construction. , and the buried pipe must keep a sufficient distance, so the overall area is large, and the site conditions are not easy to meet. In actual operation, due to the low temperature of the ground source, the system performance coefficient is not high, and it is also prone to ground source heat. Unbalanced conditions cannot guarantee long-term operation.

In addition, when the system of the above-mentioned patent is used for the first time, it is necessary to obtain hot water for bathing through the auxiliary heating system, and then the bathing wastewater can be obtained, and then the system can be operated.

Therefore, how to use it without the auxiliary heating system under any working conditions throughout the year, and how to obtain more hot water than bathing wastewater in winter are technical problems that those skilled in the art need to solve urgently.

SUMMARY OF THE INVENTION

The object of the present invention is to: overcome the deficiencies of the prior art, and provide a system for producing domestic hot water by combining a bathing waste water source and a ground source, and can obtain various working conditions throughout the year without other hot water equipment throughout the year. Under all conditions, the outstanding effect of the ratio of clean water to wastewater flow rate ≥ 1:1 can be achieved, and the bath wastewater can not only be used to produce hot water for bathing, but also all domestic hot water needed for kitchen and bathroom washing, hand washing, and face washing; Compared with the ordinary ground source heat pump system, the temperature of the bathing wastewater source is significantly higher than the ground source temperature, and the wastewater and clean water exchange heat directly in the heat exchanger, so that the heating capacity and performance coefficient of the system can be increased by about 50%; a total of two-stage heat pump system, The waste heat in the waste water is completely recovered, and only the heat energy in the waste water can be used to heat the clean water to the temperature required for bathing most of the year. It is used as an auxiliary heat source in winter, with a small amount of use, and it does not work most of the time, which will not lead to thermal imbalance of the ground source; when supplementing heat energy from the ground source, water or bathing wastewater is used as the medium, and the bathing wastewater is not changed to make hot water. The unique heat pump structure only adds buried pipes, and the dual-source shared cascade utilizes heat pump components to simplify the system; when the solenoid valve is opened, the path of water passing through the solenoid valve is extremely short, and the valve has a large diameter, and its pipeline resistance is much smaller than the buried pipe. , the clean water or waste water goes directly to the next stage through the buried pipe. When the solenoid valve is closed, the clean water or waste water is forced to enter the buried pipe to absorb heat, and the ground source switching is controlled by only one valve, which is simple and reliable. Compared with ordinary ground source heat pump units with the same heating capacity, the method requires less buried pipe length.

The technical scheme adopted by the present invention is:

A system for producing domestic hot water by combining a bathing waste water source and a ground source, including a heat exchanger, the water inlet end A and the water inlet end B of the heat exchanger are respectively connected with the clean water inlet pipe A and the waste water outlet pipe of the bathing waste water storage tank Correspondingly connected, the water outlet end A and the water outlet end B of the heat exchanger are respectively connected with the fresh water primary heat pipe and the waste water primary cooling pipe respectively, the waste water storage tank is communicated with the bath waste water pipe; the fresh water primary heat pipe and the heat pump A condensation The condensing water inlet end A of the condenser A is connected, the condensing water outlet end A of the condenser A is communicated with the condensing water inlet end B of the condenser B of the heat pump B through the heat pipe in the clean water, and the condensing water outlet end B of the condenser B is connected by The clean water end heat pipe is communicated with the hot water storage tank, the bottom of the hot water storage tank is also connected with a hot water outlet pipe, and the waste water initial cooling pipe is communicated with the evaporation water inlet end A of the evaporator B of the heat pump B, and the evaporation The evaporative water outlet end A of the evaporator B is communicated with the evaporative water inlet end B of the evaporator A of the heat pump A through the waste water mid-cooling pipe, and the evaporative water outlet end B of the evaporator A is communicated with the waste water drain pipe; Or a buried pipe is connected in parallel with the waste water intercooling pipe, and the corresponding clean water inlet pipe A or the wastewater intercooling pipe is also provided with a solenoid valve at a position between the connection ends of the buried pipe.

A further improvement scheme of the present invention is that a waste water supply pump is connected to the waste water outlet pipe, and the waste water supply pump pumps the bathing waste water in the waste water storage tank to the water inlet end B of the heat exchanger.

A further improvement scheme of the present invention is that the ratio of the inlet flow of the fresh water inlet pipe A into the heat exchanger and the inlet flow of the waste water outlet pipe into the heat exchanger is in the range of 1.0-1.4:1.

A further improvement scheme of the present invention is that the condenser A and the evaporator A of the heat pump A are cyclically connected through a refrigerant pipe A, and the refrigerant pipe A is also connected with a compressor A and a throttle valve A, The medium A in the refrigerant pipe A flows out of the compressor A, passes through the condenser A, the throttle valve A and the evaporator A in sequence, and then returns to the compressor A again.

A further improvement scheme of the present invention is that the condenser B and the evaporator B of the heat pump B are cyclically connected through a refrigerant pipe B, and the refrigerant pipe B is also connected with a compressor B and a throttle valve B, The medium B in the refrigerant pipe B flows out from the compressor B, passes through the condenser B, the throttle valve B and the evaporator B in sequence, and then returns to the compressor B again.

A further improvement scheme of the present invention is that the bathing waste water pipe is connected to the top of the waste water storage tank, and the waste water outlet pipe is connected to the bottom of the side wall of the waste water storage tank.

A further improvement scheme of the present invention is that the clean water end heat pipe is connected to the top of the side wall of the hot water storage tank, and the hot water outlet pipe is connected to the bottom of the side wall of the hot water storage tank.

A further improvement scheme of the present invention is that when a buried pipe is connected in parallel with the cold pipe in the waste water: a clean water circulating pipe is connected between the hot water storage tank and the hot pipe in the clean water, and the clean water circulating pipe is connected with a Circulating pump A, the circulating pump A sends the water pump in the hot water storage tank to the heat pipe in the clean water, and a valve is provided on the heat pipe in the clean water, between the condenser A and the heat pipe in the clean water corresponding to the communication pipe of the clean water A, the hot water storage tank is also connected with a clean water inlet pipe B, and the waste water inlet pipe B is connected with a valve B.

A further improvement scheme of the present invention is that the waste water primary cooling pipe is also connected with a clean water inlet pipe C, and the waste water primary cooling pipe is also connected with a circulating pump B between the evaporator B and the clean water inlet pipe C, so The circulating pump B pumps the bathing wastewater in the wastewater initial cooling pipe to the evaporator B, and a wastewater circulating pipe is also connected between the wastewater middle heat pipe and the wastewater initial cooling pipe, and one end of the wastewater circulating pipe is connected to the waste water middle heat pipe. 2. It is located between the connection between the outlet end of the buried pipe B and the evaporator A. The other end of the waste water circulation pipe is connected to the waste water primary cooling pipe, and is located at the outlet end B of the heat exchanger and corresponds to the clean water inlet pipe C. At the position between the communication points, a valve C is provided on the waste water primary cooling pipe, between the water outlet B of the heat exchanger and the communication point corresponding to the waste water circulation pipe, and the waste water intermediate cooling pipe is located on the middle cooling pipe. A valve D is provided between the evaporator A and the connection corresponding to the waste water circulation pipe, a valve E is connected to the fresh water inlet pipe C, and a valve F is connected to the waste water circulation pipe.

A further improvement scheme of the present invention is that a valve G is also communicated with the fresh water circulating pipe between the hot water storage tank and the circulating pump A.

A further improvement scheme of the present invention is that the clean water inlet pipe B is connected to the top of the side wall of the hot water storage tank, and the clean water circulation pipe is connected to the bottom of the side wall of the hot water storage tank.

A further improvement scheme of the present invention is that when a buried pipe is connected in parallel on the clean water inlet pipe A, the buried pipe A is connected in parallel with the clean water inlet pipe A, and the two ends of the buried pipe A are respectively connected to The clean water inlet pipe A corresponds to the two ends of the solenoid valve A; when there are buried pipes connected in parallel with the waste water intercooling pipe, a solenoid valve B is connected to the waste water intercooling pipe, and the waste water intercooling pipe is connected with a solenoid valve B. A buried pipe B is connected in parallel, and both ends of the buried pipe B are respectively connected to the two ends of the waste water intermediate cooling pipe corresponding to the two ends of the solenoid valve B.

The beneficial effects of the present invention are:

First, the system for producing domestic hot water by combining the bath waste water source and the ground source of the present invention can obtain the ratio of the flow rate of clean water to waste water under various working conditions throughout the year without other hot water equipment. The outstanding effect of ≥1:1 can be used to produce not only hot water for bathing, but also all domestic hot water needed for washing dishes, washing hands, and washing faces in kitchens and bathrooms.

Second, the system for producing domestic hot water by combining the bathing wastewater source and the ground source of the present invention, compared with the ordinary ground source heat pump system, the temperature of the bathing wastewater source is significantly higher than that of the ground source, and the wastewater and clean water are directly exchanged in the heat exchanger It can increase the heating capacity and performance coefficient of the system by about 50%.

Third, the system for producing domestic hot water by combining the bathing waste water source and the ground source of the present invention has a total of two-stage heat pump system, so that the waste heat in the waste water can be completely recovered, and only the heat energy in the waste water can be used for most of the year to heat the clean water To the temperature required for bathing, the buried pipe is used to absorb heat from the ground source only when the temperature of the tap water is particularly low, and it is only used as an auxiliary heat source in winter, the amount is small, and it does not work most of the time, which will not cause the ground source. thermal imbalance.

Fourth, the system for producing domestic hot water by combining the bathing wastewater source and the ground source of the present invention uses clean water or bathing wastewater as the medium when supplementing thermal energy from the ground source, and does not change the heat pump structure for producing hot water from the bathing wastewater. Buried pipes are added, and the dual-source shared cascade utilizes heat pump components, and the system is simplified.

Fifth, according to the system for producing domestic hot water by combining the bath waste water source and the ground source of the present invention, when the solenoid valve is opened, the path of water passing through the solenoid valve is extremely short. In addition, the valve has a large diameter, and its pipeline resistance is much smaller than that of the buried pipe. The clean water or waste water goes directly to the next stage after passing the buried pipe. When the solenoid valve is closed, the clean water or waste water is forced to enter the buried pipe. The system absorbs heat from the waste water and the ground source. The ground source switching is controlled by only one valve, which is simple and reliable. .

Sixth, the system for producing domestic hot water by combining the bath waste water source and the ground source of the present invention requires less buried pipe length than the common ground source heat pump unit with the same heating capacity.

Description of drawings

Figure 1 is a schematic structural diagram of the invention.

FIG. 2 is a data table of Embodiment 1 of the present invention.

FIG. 3 is a data table of Embodiment 2 of the present invention.

FIG. 4 is a data table of Embodiment 3 of the present invention.

FIG. 5 is a data table of Embodiment 4 of the present invention.

FIG. 6 is a data table of Embodiment 5 of the present invention.

FIG. 7 is a COP curve diagram of Examples 1 to 5 of the present invention.

Detailed ways

As can be seen from Figure 1, a system for producing domestic hot water by combining a bathing wastewater source and a ground source includes a heat exchanger 4, and the water inlet A and the water inlet B of the heat exchanger 4 are respectively connected with the clean water inlet pipe A1 and the bathing water inlet pipe A1. The waste water outlet pipe 16 of the waste water storage tank 14 is connected correspondingly, the water outlet end A and the water outlet end B of the heat exchanger 4 are respectively connected with the fresh water primary heat pipe 5 and the waste water primary cooling pipe 17, and the waste water storage tank 14 is connected with the bathing wastewater. The pipe 13 is communicated; the fresh water primary heat pipe 5 is communicated with the condensation water inlet end A of the condenser A7 of the heat pump A, and the condensation water outlet end A of the condenser A7 passes through the clean water heat pipe 20 and the condensation inlet end of the condenser B10 of the heat pump B. The water end B is connected, and the condensation water outlet B of the condenser B10 is communicated with the hot water storage tank 11 through the clean water end heat pipe 41. The hot water storage tank 11 is also connected with a hot water outlet pipe 12 at the bottom. The cold pipe 17 is communicated with the evaporative water inlet end A of the evaporator B21 of the heat pump B, and the evaporative water outlet end A of the evaporator B21 is communicated with the evaporative water inlet end B of the evaporator A26 of the heat pump A through the cold pipe 22 in the waste water. The evaporation water outlet B of the evaporator A26 is communicated with the waste water drain pipe 27; the clear water inlet pipe A1 or the waste water cooling pipe 22 is connected in parallel with a buried pipe, and the corresponding clean water inlet pipe A1 or the waste water cooling pipe is connected in parallel. 22 is also provided with a solenoid valve corresponding to the position between the connection ends of the buried pipe.

The waste water outlet pipe 16 is connected with a waste water supply pump 15 , and the waste water supply pump 15 pumps the bathing waste water in the waste water storage tank 14 to the water inlet B of the heat exchanger 4 .

The ratio of the inlet flow rate of the fresh water inlet pipe A1 into the heat exchanger 4 and the inlet flow rate of the waste water outlet pipe 16 into the heat exchanger 4 is in the range of 1.0-1.4:1.

The condenser A7 and the evaporator A26 of the heat pump A are cyclically connected through a refrigerant pipe A6, and the refrigerant pipe A6 is also connected with a compressor A28 and a throttle valve A29. After flowing out from the compressor A28, the medium A passes through the condenser A7, the throttle valve A29 and the evaporator A26 in sequence, and then returns to the compressor A28 again.

The condenser B10 and the evaporator B21 of the heat pump B are cyclically connected through a refrigerant pipe B9, and the refrigerant pipe B9 is also connected with a compressor B30 and a throttle valve B31. After flowing out from the compressor B30, the medium B passes through the condenser B10, the throttle valve B31 and the evaporator B21 in sequence, and then returns to the compressor B30 again.

The bathing waste water pipe 13 is connected to the top of the waste water storage tank 14 , and the waste water outlet pipe 16 is connected to the bottom of the side wall of the waste water storage tank 14 .

The clean water end heat pipe 41 is connected to the top of the side wall of the hot water storage tank 11 , and the hot water outlet pipe 12 is connected to the bottom of the side wall of the hot water storage tank 11 .

When a buried pipe is connected in parallel with the cold water pipe 22 in the waste water: a clean water circulation pipe 38 is connected between the hot water storage tank 11 and the hot water pipe 20 in the clean water, and a circulating pump A39 is connected to the clean water circulation pipe 38. The circulating pump A39 sends the water pump in the hot water storage tank 11 to the clean water heat pipe 20, which is located on the clean water heat pipe 20, located between the condenser A7 and the clean water heat pipe 20 corresponding to the clean water circulation pipe 38. There is a valve A8, the hot water storage tank 11 is also connected with a clean water inlet pipe B36, and the waste water inlet pipe B36 is connected with a valve B37.

The waste water initial cooling pipe 17 is also connected with a clean water inlet pipe C32, and the wastewater initial cooling pipe 17 is also connected with a circulating pump B19 between the evaporator B21 and the clean water inlet pipe C32, and the circulating pump B19 converts the wastewater. The bath waste water in the primary cooling pipe 17 is pumped to the evaporator B21, and a waste water circulation pipe 34 is also communicated between the waste water middle heat pipe 22 and the waste water primary cooling pipe 17, and one end of the waste water circulation pipe 34 is connected to the waste water middle heat pipe 22. At the position between the connection between the outlet end of the buried pipe B24 and the evaporator A26, the other end of the waste water circulation pipe 34 is communicated with the waste water primary cooling pipe 17 and is located at the outlet end B of the heat exchanger 4 and corresponding to the clean water. At the position between the communication parts of the water inlet pipe C32, a valve C18 is provided on the waste water primary cooling pipe 17, between the heat exchanger 4 and the water outlet B and the communication position corresponding to the waste water circulation pipe 34. A valve D25 is provided on the waste water intermediate cooling pipe 22, between the evaporator A26 and the connection corresponding to the waste water circulation pipe 34, a valve E33 is communicated on the clean water inlet pipe C32, and a valve E33 is communicated on the waste water circulation pipe 34. There is valve F35.

A valve G40 is also communicated with the fresh water circulation pipe 38 between the hot water storage tank 11 and the circulation pump A39.

The clean water inlet pipe B36 is connected to the top of the side wall of the hot water storage tank 11 , and the clean water circulation pipe 38 is connected to the bottom of the side wall of the hot water storage tank 11 .

When the clean water inlet pipe A1 is connected with a buried pipe in parallel, the clean water inlet pipe A1 is connected in parallel with a buried pipe A3, and the two ends of the buried pipe A3 are respectively connected to the clean water inlet pipe A1 corresponding to the solenoid valve. At the two ends of A2; when the waste water cooling pipe 22 is connected in parallel with buried pipes, the waste water cooling pipe 22 is connected with a solenoid valve B23, and the waste water cooling pipe 22 is connected in parallel with buried pipes Pipe B24, the two ends of the buried pipe B24 are respectively connected to the two ends of the waste water intermediate cooling pipe 22 corresponding to the two ends of the solenoid valve B23.

When this application is used for the first time, first open the valve B37, fill the hot water storage tank 11 with clean water through the clean water inlet pipe B36, open the valve E33 and the valve F35 at the same time, and keep the solenoid valve B23 closed, so that the clean water inlet pipe After the clean water in C32 is filled with the waste water primary cooling pipe 17, the loop formed by the evaporator B21, the waste water intermediate cooling pipe 22, the buried pipe B24 and the waste water circulation pipe 34; then close the valve B37 and the valve E33, and keep the valve A8, The valve C18 and the valve D25 are closed, and the valve G40 is opened at the same time, and the valve F35 is kept open. In addition, the circulating pump A39 and the circulating pump B19 are started, so that the clean water in the hot water storage tank 11 passes through the circulating pump A39 and the clean water of the clean water circulating pipe 38 in turn. The middle heat pipe 20, the condenser B10 and the clean water end heat pipe 41 are circulated back to the hot water storage tank 11, and the clean water in the waste water primary cooling pipe 17 is passed through the circulating pump B19, the evaporator B21, and the waste water middle cooling pipe 22 in turn. The buried pipe 24 and the waste water circulation pipe 34 are circulated back to the waste water primary cooling pipe 17; because the clear water in the buried pipe 24 can absorb the heat in the soil and be heated, so that the fresh water circulating into the waste water primary cooling pipe 17 is heated every time. The medium B, which absorbs the heat of the clean water in the initial cooling pipe 17 of the waste water, can be continuously released by the evaporator B2 to the clean water in the clean water heat pipe 20 through the condenser B10. Thus, the water in the hot water storage tank 11 is gradually heated until it can be used for domestic hot water or bathing.

When the hot water in the hot water storage tank 11 can be discharged through the hot water outlet pipe 12 to meet domestic hot water or bathing water use, the discharged bathing waste water is discharged into the waste water storage tank 14 through the bathing waste water pipe 13; open the valve A8 , valve C18 and valve D25, close valve F35, valve G40, waste water supply pump 15 and circulation pump A39, and then keep valve B37, circulation pump B19, valve E33, solenoid valve A2 and solenoid valve B23 closed; thus making the clean water inlet pipe A1 The clean water in the ground first absorbs the heat in the soil through the buried pipe A3 for preheating, and then conducts primary heat exchange with the bathing wastewater discharged from the wastewater storage tank 14 through the heat exchanger 4, so that the bathing wastewater is initially cooled and then enters the initial stage of the wastewater. The cold pipe 17 and the clean water enter into the clean water initial heat pipe 5 after the initial heat, and then the clean water in the clean water initial heat pipe 5 and the condenser A7 of the heat pump A realize the second heat exchange and enter the clean water middle heat pipe 20, and the clean water in the clean water middle heat pipe 20 After realizing the third heat exchange with the condenser B10 of the heat pump B, it enters the hot water storage tank 11 through the clean water end heat pipe 41 for standby use; and the bathing wastewater in the waste water initial cooling pipe 17 enters the evaporator B21 of the heat pump B through the circulating pump 19 After the second heat exchange is realized, it enters the waste water intermediate cooling pipe 22. At this time, the temperature of the bathing wastewater after the second heat exchange has been reduced to about 5 degrees Celsius. If the bathing wastewater is directly exchanged through the evaporator A26 of the heat pump A again If it is hot, it will cause the bathing waste water in the evaporation outlet B corresponding to the evaporator A26 and the waste water drainage pipe 27 to freeze, making it impossible to continue to use it, or even freezing the equipment, so the bathing waste water after the second heat exchange first enters the ground. Buried in the pipe B24, and by absorbing the heat in the soil, the bathing wastewater in the buried pipe 24 is again heated to more than 10 degrees Celsius, so that the bathing wastewater in the cold pipe 22 in the wastewater passes through the evaporator A26 of the heat pump A for the third time. After heat exchange, the bathing wastewater will not freeze, thus realizing the normal and effective operation of the system.

In the other three seasons except winter, when the temperature of the tap water is high, the temperature difference between the clean water and the wastewater decreases, the heat energy released by the wastewater during heat exchange becomes smaller, and the temperature drop of the wastewater becomes smaller, so after the heat exchanger and the evaporator The temperature of the waste water will increase afterwards. The water temperature of the clean water in the clean water inlet pipe A1 and the water temperature of the waste water in the waste water cooling pipe 22 are respectively higher than the water temperature in the buried pipe A3 and the buried pipe B24, so the solenoid valves A2 and B24 can be opened directly. Solenoid valve B23, so that the clean water in the clean water inlet pipe A1 directly exchanges heat through the heat exchanger 4, and also allows the bathing wastewater that has undergone the second heat exchange to directly pass through the evaporator A26 of the heat pump A for the third heat exchange.

Example 1

The test record of the ratio of fresh water flow to waste water flow is 1.4:1 as shown in Figure 2.

Example 2

The test record of the ratio of fresh water flow to waste water flow is 1.3:1 as shown in Figure 3.

Example 3

The test record of the ratio of fresh water flow to waste water flow is 1.2:1 as shown in Figure 4.

Example 4

The test record of the ratio of fresh water flow to waste water flow is 1.1:1 as shown in Figure 5.

Example 5

The test record of the ratio of fresh water flow to waste water flow is 1.0:1 as shown in Figure 6.

As shown in Figure 7, the operation test is carried out according to the present invention, and the results show that the present invention can be operated according to the ratio of clean water flow to wastewater flow 1.4:1, and the COP value at this time is 8.132, which is about the water (ground) specified by the national standard. 2 times the COP limit of the source heat pump unit, and 50% higher than the first-level energy efficiency (ACCP of 5.0) of the water (ground) source heat pump unit. The 42°C domestic hot water with 1.4 times the water volume can meet all domestic hot water needs, and the COP value is as high as 8.0 or more.

As can be seen from the tabular data of FIGS. 2 to 6 and the graph shown in FIG. 7 , in each embodiment of the present invention, under the condition that the water inlet temperature of clean water in winter is about 8 degrees Celsius, the outlet water temperature after the heating of the present invention is all Can reach above 42 degrees Celsius. It can fully meet the bathing water and domestic water in winter.

Compared with the common ground source heat pump unit with the same heating capacity, the method of the present invention requires only a small length of buried pipes. Taking a residential building with 11 floors, 5 units and 110 households as an example, one 10P machine designed according to this method can meet the supply of domestic hot water, and the supporting buried pipes A3 and B24 are both DN32 double U-shaped PE pipes , The depth of the shaft is 120m, there are 2 shafts in total, and the area is very small.

Claims (10)

1. A system for producing domestic hot water by combining a bathing waste water source with a ground source, characterized in that it comprises a heat exchanger (4), and the water inlet A and the water inlet B of the heat exchanger (4) are respectively connected with clean water. The water inlet pipe A (1) and the waste water outlet pipe (16) of the bathing waste water storage tank (14) are correspondingly connected, and the water outlet end A and the water outlet end B of the heat exchanger (4) are respectively connected with the clean water primary heat pipe (5) and the waste water The primary cooling pipe (17) is communicated correspondingly, and the waste water storage tank (14) is communicated with the bathing waste water pipe (13); The condensing water outlet end A of the condenser A (7) is communicated with the condensing water inlet end B of the condenser B (10) of the heat pump B through the heat pipe (20) in the clean water, and the condensing water end of the condenser B (10) is connected. The water outlet B is communicated with the hot water storage tank (11) through the clean water end heat pipe (41), and a hot water outlet pipe (12) is also connected to the bottom of the hot water storage tank (11), and the waste water initial cooling pipe (17) ) is communicated with the evaporation water inlet end A of the evaporator B (21) of the heat pump B, and the evaporation water outlet A of the evaporator B (21) communicates with the evaporator A (26) of the heat pump A through the waste water intercooling pipe (22). The evaporative water inlet end B of the evaporator A (26) is communicated with the waste water drainage pipe (27); the fresh water inlet pipe A (1) or the waste water intermediate cooling pipe (22) are connected in parallel A buried pipe is communicated, and a solenoid valve is also provided at a position between the corresponding clean water inlet pipe A (1) or the waste water intercooling pipe (22) corresponding to the connection ends of the buried pipe. 2 . The system for producing domestic hot water by combining a bathing wastewater source and a ground source according to claim 1 , wherein the wastewater outlet pipe ( 16 ) is connected with a wastewater supply pump ( 15 ), and the wastewater The water supply pump (15) pumps the bathing waste water in the waste water storage tank (14) to the water inlet end B of the heat exchanger (4). 3. The system for producing domestic hot water by combining a bathing waste water source and a ground source according to claim 1, characterized in that: the inlet flow and waste water of the fresh water inlet pipe A (1) into the heat exchanger (4) The ratio of the liquid inlet flow rate of the water outlet pipe (16) entering the heat exchanger (4) is in the range of 1.0~1.4:1. 4 . The system for producing domestic hot water by combining a bathing wastewater source and a ground source according to claim 1 , characterized in that: refrigeration is passed between the condenser A ( 7 ) and the evaporator A ( 26 ) of the heat pump A The refrigerant pipe A (6) is in cyclic communication, and the refrigerant pipe A (6) is also connected with a compressor A (28) and a throttle valve A (29). The medium in the refrigerant pipe A (6) A flows out from the compressor A (28) and then flows through the condenser A (7), the throttle valve A (29) and the evaporator A (26) in sequence, and then returns to the compressor A (28) again; the condensation of the heat pump B The refrigerant pipe B (9) is in circulation communication between the evaporator B (10) and the evaporator B (21), and the refrigerant pipe B (9) is also connected with a compressor B (30) and a throttle valve B. (31), the medium B in the refrigerant pipe B (9) flows out from the compressor B (30) and passes through the condenser B (10), the throttle valve B (31) and the evaporator B (21) in sequence Return to compressor B (30) again. 5. The system for producing domestic hot water by combining a bathing waste water source and a ground source according to claim 1, wherein the bathing waste water pipe (13) is connected to the top of the waste water storage tank (14), and the waste water The water outlet pipe (16) is communicated with the bottom of the side wall of the waste water storage tank (14). 6. The system for producing domestic hot water by combining a bathing wastewater source and a ground source according to claim 1, wherein the clean water end heat pipe (41) is connected to the top of the side wall of the hot water storage tank (11), The hot water outlet pipe (12) is communicated with the bottom of the side wall of the hot water storage tank (11). 7. The system for producing domestic hot water by combining a bathing wastewater source and a ground source according to any one of claims 1 to 6, characterized in that: when a buried pipe is connected in parallel on the cooling pipe (22) in the wastewater : A clean water circulation pipe (38) is communicated between the hot water storage tank (11) and the clean water heat pipe (20), and a circulating pump A (39) is connected to the clean water circulation pipe (38). The pump A (39) sends the water pump in the hot water storage tank (11) to the clean water heat pipe (20), which is located on the condenser A (7) and the clean water heat pipe (20) corresponding to the clean water heat pipe (20). A valve A (8) is arranged between the communication parts of the clean water circulation pipe (38), and the hot water storage tank (11) is also connected with a clean water inlet pipe B (36), which is connected with the waste water inlet pipe B (36). The upper communication is provided with a valve B (37); The waste water initial cooling pipe (17) is also connected with a clean water inlet pipe C (32), and the waste water initial cooling pipe (17) is also connected between the evaporator B (21) and the clean water inlet pipe C (32). A circulating pump B (19) is provided, and the circulating pump B (19) pumps the bath waste water in the waste water initial cooling pipe (17) to the evaporator B (21), and the waste water heat pipe (22) and the waste water initial cooling A waste water circulation pipe (34) is also communicated between the pipes (17), and one end of the waste water circulation pipe (34) is communicated with the evaporator A (26) at the connection point of the heat pipe (22) in the waste water, which is located at the outlet end of the buried pipe. ), the other end of the waste water circulation pipe (34) is connected to the connection between the waste water primary cooling pipe (17) and the water outlet B of the heat exchanger (4) and the connection corresponding to the clean water inlet pipe C (32). At the position between the waste water primary cooling pipe (17), between the heat exchanger (4) and the water outlet B and the communication point corresponding to the waste water circulation pipe (34), there is a valve C (18). ), a valve D (25) is provided on the waste water intermediate cooling pipe (22), between the evaporator A (26) and the connection corresponding to the waste water circulation pipe (34), and the clean water inlet pipe C (32) ) is connected with a valve E (33), and the waste water circulation pipe (34) is connected with a valve F (35). 8 . The system for producing domestic hot water by combining a bathing wastewater source and a ground source according to claim 7 , wherein the clean water circulation pipe ( 38 ) is located on the hot water storage tank ( 11 ) and the circulation pump A. 9 . A valve G (40) is also communicated between (39). 9 . The system for producing domestic hot water by combining a bathing wastewater source and a ground source according to claim 7 , wherein the clean water inlet pipe B ( 36 ) is connected to the top of the side wall of the hot water storage tank ( 11 ). 10 . , the clean water circulation pipe (38) is communicated with the bottom of the side wall of the hot water storage tank (11). 10. The system for producing domestic hot water by combining a bathing wastewater source and a ground source according to claim 1, characterized in that: when a buried pipe is connected in parallel on the clean water inlet pipe A (1), the clean water inlet pipe A (1) is The water pipe A(1) is connected in parallel with the buried pipe A(3), and the two ends of the buried pipe A(3) are respectively connected to the two ends of the clean water inlet pipe A(1) corresponding to the solenoid valve A(2). position; when a buried pipe is connected in parallel with the waste water cooling pipe (22), a solenoid valve B (23) is connected to the waste water cooling pipe (22), and the waste water cooling pipe (22) is connected to a solenoid valve B (23). A buried pipe B ( 24 ) is connected in parallel, and both ends of the buried pipe B ( 24 ) are respectively connected to the two ends of the wastewater intercooling pipe ( 22 ) corresponding to the two ends of the solenoid valve B ( 23 ).

Images