Hydraulic module and hot water system

Abstract

The utility model relates to the technical field of hot water systems, in particular to a hydraulic module and a hot water system. The hydraulic module comprises a heat exchanger, a hot water pipe, a water return pipe, a cold water pipe, a water outlet pipe and a heater, the heat exchanger is provided with a first water inlet, a first water outlet, a second water inlet and a second water outlet, one end of the hot water pipe communicates with the first water inlet, and one end of the water return pipe communicates with the first water outlet to circularly supply hot water to the heat exchanger. One end of the cold water pipe communicates with the second water inlet, one end of the water outlet pipe communicates with the second water outlet, and the other end of the water outlet pipe communicates with a water using end. The heater is installed on the water outlet pipe. The hot water system comprises the hydraulic module, hot water at the water using end is obtained in a direct heating mode, and energy conservation and consumption reduction are achieved. And meanwhile, the heater can conduct secondary heating on hot water in the water outlet pipe, and the water temperature in the water outlet pipe is further increased. And the heater can also heat the hot water in the water outlet pipe to a temperature required by sterilization, so that the heater has a sterilization effect.

Description

Technical Field

[0001] The utility model relates to the technical field of hot water systems, in particular to a hydraulic module and a hot water system. Background Art

[0002] In the hot water system, domestic hot water provided by heat pumps is usually stored in water tanks. Legionella will grow in the water tanks after long-term use, causing the stored hot water to be contaminated. Therefore, the water tanks need to be heated and sterilized regularly. However, the high-temperature sterilization process requires heating the entire tank of water, which takes a long time and consumes a lot of energy. Moreover, the energy efficiency ratio of the heat pump drops significantly when the outlet water temperature is high, resulting in the outlet water temperature of the heat pump not reaching the temperature that can immediately kill Legionella. Electric heating is often required to assist in sterilization, further increasing energy consumption. Utility Model Content

[0003] One of the technical problems solved by the utility model is to provide a hydraulic module, which can effectively solve the technical problems existing in the prior art that hot water stored in a water tank in a hot water system is prone to breeding bacteria and sterilization leads to increased energy consumption.

[0004] The second technical problem solved by the utility model is to provide a hot water system, which can effectively solve the technical problems existing in the prior art that hot water stored in a water tank in a hot water system is prone to breed bacteria and sterilization leads to increased energy consumption.

[0005] The first technical problem mentioned above is solved by the following technical solution:

[0006] A hydraulic module, comprising a heat exchanger, a hot water pipe, a return pipe, a cold water pipe and a water outlet pipe, wherein the heat exchanger has a first water inlet, a first water outlet, a second water inlet and a second water outlet, one end of the hot water pipe is connected to the first water inlet, and one end of the return pipe is connected to the first water outlet to circulate hot water to the heat exchanger; one end of the cold water pipe is connected to the second water inlet, one end of the water outlet pipe is connected to the second water outlet, and the other end of the water outlet pipe is used to communicate with a water use end;

[0007] The hydraulic module further includes a heater, and the heater is installed on the water outlet pipe.

[0008] Compared with the background technology, the hydraulic module of the utility model has the following beneficial effects:

[0009] In the hydraulic module, the hot water pipe and the return pipe circulate hot water to the heat exchanger. After the cold water in the cold water pipe completes heat exchange and temperature rises in the heat exchanger, it flows to the water-using end through the outlet pipe. The hydraulic module allows the hot water flowing to the water-using end to be obtained by direct heating, without the need to use a water tank for storage, to prevent the water tank from breeding bacteria during long-term use. This not only improves the cleanliness of the hot water at the water-using end, but also eliminates the need for high-temperature sterilization of the water tank, thus achieving energy conservation and consumption reduction of the hydraulic module. At the same time, the heater can also perform secondary heating on the hot water in the outlet pipe, further increasing the water temperature in the outlet pipe to meet the use requirements of the water-using end. Moreover, the heater can also heat the hot water in the outlet pipe to the temperature required for sterilization, so that the heater has a sterilization effect, ensuring the cleanliness of the hot water at the water-using end.

[0010] In one embodiment, the hydraulic module also includes a water mixing valve and a water pump, and the water mixing valve and the water pump are installed on the hot water pipe in sequence along the water flow direction. The water mixing valve has a first interface, a second interface and a third interface with adjustable opening that are interconnected. The hot water pipe is connected to the second interface through the first interface in sequence, and the return pipe is connected to the third interface.

[0011] In one embodiment, the hydraulic module further includes a first temperature measuring component, and the first temperature measuring component is used to measure the water temperature at the second water outlet.

[0012] In one of the embodiments, the hydraulic module further includes a circulation branch pipe, one end of which is connected to the cold water pipe, and the other end of which is used for connecting to a return water pipeline of an external water use end.

[0013] In one of the embodiments, a stop valve is installed at one end of the cold water pipe away from the second water inlet.

[0014] In one of the embodiments, the circulation branch pipe is installed with a pressure relief valve, and the pressure relief valve is configured to open when the pressure in the circulation branch pipe reaches a preset value.

[0015] In one of the embodiments, the water outlet pipe is installed with a second temperature measuring component, and the second temperature measuring component is used to measure the water temperature in the water outlet pipe.

[0016] In one of the embodiments, the hydraulic module further includes an exhaust and drain valve installed on the hot water pipe.

[0017] The above second technical problem is solved by the following technical solution:

[0018] The hot water system includes a heat source, a water use end, a water supply end and the above-mentioned hydraulic module, the hot water pipe is connected to the water outlet end of the heat source, the return pipe is connected to the return end of the heat source; the cold water pipe is connected to the water supply end for supplying cold water.

[0019] Compared with the background technology, the hot water system of the utility model has the following beneficial effects:

[0020] In the hot water system, the heat source circulates hot water to the heat exchanger through the hot water pipe and the return pipe, and the water supply end provides cold water to the cold water pipe. After the cold water in the cold water pipe completes heat exchange and temperature rises in the heat exchanger, it flows to the water-using end through the outlet pipe. The hydraulic module allows the hot water flowing to the water-using end to be obtained by direct heating, without the need to use a water tank for storage, to prevent the water tank from breeding bacteria during long-term use. This not only improves the cleanliness of the hot water at the water-using end, but also eliminates the need for high-temperature sterilization of the water tank, thus achieving energy conservation and consumption reduction of the hot water system. At the same time, the heater can also perform secondary heating on the hot water in the outlet pipe, further increasing the water temperature in the outlet pipe to meet the use requirements of the water-using end. Moreover, the heater can also heat the hot water in the outlet pipe to the temperature required for sterilization, so that the heater has a sterilization effect, ensuring the cleanliness of the hot water at the water-using end.

[0021] In one embodiment, the hot water system also includes a first external pipe, a second external pipe and a circulation pump, the water outlet pipe is connected to the water use end through the first external pipe, one end of the second external pipe is connected to the first external pipe, the other end of the second external pipe is connected to the circulation branch of the cold water pipe, and the circulation pump is installed on the second external pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structural distribution of the hot water system provided by the embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of the internal structure of the hydraulic module provided in the embodiment of the utility model.

[0024] The names and numbers of the components in the figure are as follows:

[0025] 1. Heat exchanger; 101. First water inlet; 102. First water outlet; 103. Second water inlet; 104. Second water outlet; 2. Hot water pipe; 3. Return pipe; 4. Cold water pipe; 5. Outlet pipe; 6. Mixing valve; 61. First interface; 62. Second interface; 63. Third interface; 7. Water pump; 8. First temperature measuring component; 9. Control module; 10. Heater; 11. Stop valve; 12. Pressure relief valve; 13. Second temperature measuring component; 14. Exhaust and drain valve; 15. Hose; 16. Check valve; 17. Shell; 18. Circulation branch pipe;

[0026] 20. Heat source; 201. Heat pump; 202. Buffer water tank; 30. Water use end; 40. First external pipe; 50. Second external pipe; 60. Circulation pump; 70. Floor heating. DETAILED DESCRIPTION

[0027] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0029] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0030] like Figure 1 As shown, this embodiment proposes a hot water system, which includes a heat source 20, a water use end 30 and a water supply end. The heat source 20 includes a heat pump 201 and a buffer water tank 202. The heat pump 201 is an efficient energy-saving device that fully utilizes low-grade thermal energy. It consumes only a small amount of reverse cycle net work to obtain a large amount of heat supply, and has a low cost of use. The heat pump 201 can circulate hot water to the heating pipeline in the floor heating 70. After the heat pump 201 heats the water, it flows to the heating pipeline of the floor heating 70 through the buffer water tank 202, and then the hot water flows back from the outlet of the heating pipeline of the floor heating 70 to the buffer water tank 202, and finally flows to the heat pump 201 for reheating to achieve circulating heating. When the heat pump 201 heats domestic water, the water use end 30 can be kitchen water for the family, shower water for the bathroom, etc., which is not specifically limited here. At this time, the water supply end is generally a water source such as tap water.

[0031] At present, in the hot water system, the domestic hot water provided by the heat pump 201 is usually stored in a water tank. Legionella will grow in the water tank after long-term use, causing the stored hot water to be contaminated, so the water tank needs to be heated and sterilized regularly. However, the high-temperature sterilization process requires heating the entire tank of water, which takes a long time and consumes a lot of energy. Moreover, the energy efficiency ratio of the heat pump 201 decreases significantly when the outlet water temperature is high, resulting in the outlet water temperature of the heat pump 201 not reaching the temperature for immediate killing of Legionella. Electric heating is often required to assist sterilization, further increasing energy consumption.

[0032] To solve the above problems, Figure 1 and Figure 2 As shown, this embodiment proposes a hydraulic module, which includes a heat exchanger 1, a hot water pipe 2, a return pipe 3, a cold water pipe 4, a water outlet pipe 5 and a heater 10. The heater 10 is installed on the water outlet pipe 5. In the hot water system, the heat source 20 circulates hot water to the heat exchanger 1 through the hot water pipe 2 and the return pipe 3, and the water supply end provides cold water to the cold water pipe 4. After the cold water in the cold water pipe 4 completes heat exchange and temperature rises in the heat exchanger 1, it flows to the water use end 30 through the water outlet pipe 5. Through the hydraulic module, the hot water flowing to the water use end 30 is obtained by direct heating, and there is no need to use a water tank for storage, so as to avoid the breeding of bacteria in the water tank during long-term use. Not only the cleanliness of the hot water at the water use end 30 is improved, but also the water tank does not need to be sterilized at high temperature, so as to achieve energy saving and consumption reduction of the hot water system. At the same time, the heater 10 can also perform secondary heating on the hot water in the water outlet pipe 5, further improving the water temperature in the water outlet pipe 5 to meet the use requirements of the water use end. Moreover, the heater 10 can heat the hot water in the water outlet pipe 5 to a temperature required for sterilization, so that the heater 10 has a sterilization effect, thereby ensuring the cleanliness of the hot water at the water end.

[0033] The hydraulic module of this embodiment further includes a mixing valve 6 and a water pump 7. The heat exchanger 1 has a first water inlet 101, a first water outlet 102, a second water inlet 103 and a second water outlet 104. One end of the hot water pipe 2 is connected to the first water inlet 101, and one end of the return pipe 3 is connected to the first water outlet 102, so as to circulate hot water to the heat exchanger 1. One end of the cold water pipe 4 is connected to the second water inlet 103, one end of the outlet pipe 5 is connected to the second water outlet 104, and the other end of the outlet pipe 5 is used to communicate with the water end 30. The mixing valve 6 and the water pump 7 are sequentially installed on the hot water pipe 2 along the water flow direction. The mixing valve 6 has a first interface 61, a second interface 62 and a third interface 63 with adjustable opening that are interconnected. The hot water pipe 2 is sequentially connected to the second interface 62 through the first interface 61, and the return pipe 3 is connected to the third interface 63. By adjusting the opening degree of the third interface 63 of the mixing valve 6, the amount of water flowing from the return pipe 3 to the hot water pipe 2 and the amount of reflux water are adjusted, thereby adjusting the water temperature flowing from the hot water pipe 2 to the heat exchanger 1, so that the mixing valve 6 can flexibly adjust the water temperature flowing to the water use end 30 according to the water demand of the water use end 30.

[0034] Specifically, the hydraulic module further includes an exhaust and drain valve 14, a hose 15, a check valve 16 and a shell 17, wherein the heat exchanger 1, the hot water pipe 2, the return pipe 3, the cold water pipe 4, the outlet pipe 5, the mixing valve 6, the water pump 7, the exhaust and drain valve 14, the hose 15, the check valve 16 and the hose 15 are all installed in the shell 17 to realize the compact assembly of the hydraulic module. The hot water pipe 2, the return pipe 3, the cold water pipe 4 and the outlet pipe 5 are all extended out of the shell 17 to communicate with the pipeline outside the hydraulic module. The exhaust and drain valve 14 is installed near the first water inlet 101 of the hot water pipe 2 and is located at the highest point of the hot water pipe 2. When the buffer water tank 202 starts to supply hot water to the heat exchanger 1, the exhaust and drain valve 14 is opened for a certain time to discharge the air remaining in the hot water pipe 2. One end of the hose 15 is connected to the exhaust drain valve 14, and the other end of the hose 15 extends to the outside of the housing 17, so as to simultaneously guide the hot water discharged during the exhaust process of the exhaust drain valve 14 to the outside of the housing 17 to avoid corrosion of other components in the housing 17. The hose 15 can be a rubber hose, which is relatively soft, so that the hose 15 can be flexibly arranged in the housing 17 to avoid interference between the hose 15 and other components in the housing 17. A check valve 16 is installed at one end of the hot water pipe 2 close to the buffer water tank 202 and one end of the cold water pipe 4 close to the water supply end to prevent hot water from flowing back in the hot water pipe 2 or cold water from flowing back in the cold water pipe 4.

[0035] In one embodiment, if Figure 1 and Figure 2 As shown, the hydraulic module further includes a first temperature measuring component 8 and a control module 9. The first temperature measuring component 8 is used to measure the water temperature at the second water outlet 104. The water mixing valve 6 can use a solenoid valve. The first temperature measuring component 8 and the water mixing valve 6 are both electrically connected to the control module 9. Specifically, the control module 9 is a controller of the hydraulic module and is installed in the housing 17. The control module 9 can receive the water temperature at the second water outlet 104 measured by the first temperature measuring component 8, compare the water temperature at the second water outlet 104 measured by the first temperature measuring component 8 with the water temperature set at the water end 30, and then adjust the opening of the third interface 63 of the water mixing valve 6 according to the comparison result.

[0036] Specifically, when the water temperature measured by the first temperature measuring component 8 is higher than the water temperature set at the water use end 30, the control module 9 controls the opening of the third interface 63 of the mixing valve 6 to increase, so as to increase the flow rate of the return pipe 3 flowing to the hot water pipe 2 through the third interface 63, and correspondingly reduces the hot water flow rate of the buffer water tank 202 flowing to the hot water pipe 2, that is, reduces the temperature of the hot water entering the heat exchanger 1, so as to reduce the temperature rise of the cold water in the heat exchanger 1, thereby reducing the water temperature of the outlet pipe 5 flowing to the water use end 30; when the water temperature measured by the first temperature measuring component 8 is lower than the water temperature set at the water use end 30, the control module 9 controls the opening of the third interface 63 of the mixing valve 6 to decrease, so as to reduce the flow rate of the return pipe 3 flowing to the hot water pipe 2 through the third interface 63, and correspondingly increases the hot water flow rate of the buffer water tank 202 flowing to the hot water pipe 2, that is, increases the temperature of the hot water entering the heat exchanger 1, so as to increase the temperature rise of the cold water in the heat exchanger 1, thereby increasing the water temperature of the outlet pipe 5 flowing to the water use end 30.

[0037] The first temperature measuring member 8 of this embodiment is a temperature sensing rod, which is installed at the interface of the water outlet pipe 5 and extends into the second water outlet 104 to accurately measure the water temperature at the second water outlet 104. Since the control module 9 is a prior art, the structure and working principle of the control module 9 are not described in detail. The water mixing valve 6 of this embodiment is preferably an electromagnetic valve with adjustable opening. In other embodiments, a mechanical thermostatic water mixing valve with settable water temperature can also be selected. The mechanical thermostatic water mixing valve has an adjusting knob to adjust the opening of the third interface 63.

[0038] In one embodiment, if Figure 1 and Figure 2 As shown, the water outlet pipe 5 is installed with a second temperature measuring element 13, and the second temperature measuring element 13 is used to measure the water temperature in the water outlet pipe 5. The second temperature measuring element 13 of this embodiment is a temperature sensor, and the second temperature measuring element 13 is connected to the control module 9 for communication, so as to transmit the measured water temperature in the water outlet pipe 5 (i.e., the actual water temperature of the water end 30) to the control module 9.

[0039] like Figure 1 and Figure 2 As shown, the heater 10 is an electric heater, which is easy to maintain and use. When the water temperature in the water outlet pipe 5 does not reach the water temperature set by the water end 30, the heater 10 is turned on and heats the water temperature in the water outlet pipe 5 to the water temperature set by the water end 30 to meet the use requirements.

[0040] In one embodiment, if Figure 1 and Figure 2As shown, the hydraulic module further includes a circulation branch pipe 18, one end of which is connected to the cold water pipe 4, and the other end of which is used to connect to the return water pipeline of the external water end 30. After the hydraulic module turns on the sterilization mode, the water retained in the water pipe is heated to a specified temperature by turning on the heater 10. Since the heater 10 only needs to heat the water retained in the water pipe, the overall water volume is small, the sterilization time is shortened, the sterilization efficiency is improved, and energy saving and consumption reduction in the sterilization process are achieved.

[0041] Specifically, Figure 1 As shown, the hot water system also includes a first external pipe 40, a second external pipe 50 and a circulation pump 60, the water outlet pipe 5 is connected to the water end 30 through the first external pipe 40, one end of the second external pipe 50 is connected to the first external pipe 40, the other end of the second external pipe 50 is connected to the circulation branch pipe 18 of the cold water pipe 4, and the circulation pump 60 is installed on the second external pipe 50. It should be noted that the sterilization circulation pipeline includes the water outlet pipe 5, the first external pipe 40, the second external pipe 50, the circulation branch pipe 18 and the cold water pipe 4 connected in sequence. When the hydraulic module turns on the sterilization mode, the water supply end no longer supplies tap water to the cold water pipe 4, the end of the cold water pipe 4 away from the second water inlet 103 remains closed, the circulation pump 60 is turned on, the heater 10 is turned on (the water temperature set by the water end 30 does not reach the specified temperature required for sterilization), and the hot water heated to the specified temperature flows in the sterilization circulation pipeline.

[0042] It should be noted that the circulation branch pipe 18 is installed with a pressure relief valve 12. When the pressure in the circulation branch pipe 18 reaches a preset value, the pressure relief valve 12 opens to reduce the air pressure inside the sterilization circulation pipeline, avoid high pressure damaging the sterilization circulation pipeline, and ensure the safety of the sterilization process.

[0043] like Figure 1 and Figure 2 As shown, a stop valve 11 is installed at one end of the cold water pipe 4 away from the second water inlet 103, and the stop valve 11 is used to control the opening and closing of the end of the cold water pipe 4 away from the second water inlet 103. When the hydraulic module starts sterilization, the control module 9 controls the stop valve 11 to close to prevent the water supply end from delivering tap water to the cold water pipe 4. It should be noted that the hot water pipe 2, the return pipe 3 and the outlet pipe 5 are all installed with a stop valve 11, and the control module 9 can flexibly control the opening and closing of each stop valve 11 according to the actual working conditions to realize the automatic opening and closing of the hot water pipe 2, the return pipe 3 and the outlet pipe 5, thereby realizing the automatic control of the hydraulic module.

[0044] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Hydraulic module, characterized in that: The heat exchanger (1) comprises a heat exchanger (1), a hot water pipe (2), a return pipe (3), a cold water pipe (4) and a water outlet pipe (5); the heat exchanger (1) comprises a first water inlet (101), a first water outlet (102), a second water inlet (103) and a second water outlet (104); one end of the hot water pipe (2) is connected to the first water inlet (101), and one end of the return pipe (3) is connected to the first water outlet (102) so as to circulate hot water to the heat exchanger (1); one end of the cold water pipe (4) is connected to the second water inlet (103), one end of the water outlet pipe (5) is connected to the second water outlet (104), and the other end of the water outlet pipe (5) is used to be connected to a water use end (30); The hydraulic module further comprises a heater (10), and the heater (10) is installed on the water outlet pipe (5).

2. The hydraulic module according to claim 1, characterized in that: The hydraulic module further comprises a water mixing valve (6) and a water pump (7); the water mixing valve (6) and the water pump (7) are sequentially installed on the hot water pipe (2) along the water flow direction; the water mixing valve (6) comprises a first interface (61), a second interface (62) and a third interface (63) which are interconnected; the hot water pipe (2) is sequentially connected to the second interface (62) through the first interface (61); and the return pipe (3) is connected to the third interface (63).

3. The hydraulic module according to claim 2, characterized in that: The hydraulic module further comprises a first temperature measuring component (8), wherein the first temperature measuring component (8) is used to measure the water temperature at the second water outlet (104).

4. The hydraulic module according to claim 3, characterized in that: The hydraulic module further comprises a circulation branch pipe (18), one end of which is in communication with the cold water pipe (4), and the other end of which is used for connecting to a return water pipeline of an external water end (30).

5. The hydraulic module according to claim 4, characterized in that: A stop valve (11) is installed at one end of the cold water pipe (4) away from the second water inlet (103).

6. The hydraulic module according to claim 4, characterized in that: The circulation branch pipe (18) is equipped with a pressure relief valve (12), and the pressure relief valve (12) is configured to open when the pressure in the circulation branch pipe (18) reaches a preset value.

7. The hydraulic module according to any one of claims 1 to 6, characterized in that: The water outlet pipe (5) is provided with a second temperature measuring component (13), and the second temperature measuring component (13) is used to measure the water temperature in the water outlet pipe (5).

8. The hydraulic module according to any one of claims 1 to 6, characterized in that: The hydraulic module also includes an exhaust and water drain valve (14) installed on the hot water pipe (2).

9. A hot water system, characterized in that: It comprises a heat source (20), a water use end (30), a water supply end and a hydraulic module according to any one of claims 1 to 8, wherein the hot water pipe (2) is connected to the water outlet end of the heat source (20), the return water pipe (3) is connected to the return water end of the heat source (20); and the cold water pipe (4) is connected to the water supply end for supplying cold water.

10. The hot water system according to claim 9, characterized in that: The hot water system further comprises a first external pipe (40), a second external pipe (50) and a circulation pump (60); the water outlet pipe (5) is connected to the water use end (30) via the first external pipe (40); one end of the second external pipe (50) is connected to the first external pipe (40); the other end of the second external pipe (50) is connected to the circulation branch pipe (18) of the cold water pipe (4); and the circulation pump (60) is installed on the second external pipe (50).

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