TWI701414B - Heat storage method of hot water device - Google Patents

Abstract

A heat storage method for a hot water device (take an air-conditioning water heater as an example), including: maintaining microporous water injection: hot water is introduced into a heat storage container from a microporous water injection section of a hot water input pipe to maintain Horizontal water injection; guide water injection: a guide cover covering the micro-hole water injection section of the hot water input pipe forms a higher-temperature hot water flow and a lower-temperature hot water flow; and maintains the micro-hole water outlet: makes the higher temperature hot The water flows out through the micro-hole outlet section of a hot water outlet pipe to keep the water outlet level. Wherein, the hot water input pipe is connected to a hot water circulation circuit, the hot water output pipe is connected to at least one use end; the microporous water outlet section of the hot water output pipe is located above the microporous water injection section of the hot water input pipe . In this way, the injected hot water can be maintained at a stable and slow speed and avoid hot water disturbance, improve the efficiency of hot water storage temperature, and make the output temperature of the higher temperature hot water flow (target hot water) effectively prevent the lower temperature hot water flow (or Those with insufficient hot water temperature) are troubled by the output and use.

Description

Heat storage method of hot water device

The invention relates to a heat storage method for a hot water device that can improve the temperature efficiency of hot water storage, and can effectively prevent a lower temperature hot water flow (or insufficient hot water temperature) from being output to a user.

Please refer to Figure 1. The conventional air-conditioning water heater 1 is mainly configured outdoors with a compressor 11, an outdoor heat exchanger 12 (which is a condenser), a fan motor 13, a filter drier 14, and a refrigerant flow rate The controller 15 etc.; and an indoor heat exchanger 16 (an evaporator) and a fan motor 17 are arranged indoors. With the combination of the above components, the air-conditioning zone A0 is supplied with cold air, and hot water is produced in a hot water storage container 18; however, this air-conditioning water heater 1 has the following shortcomings in use:

1. The cold water sent by the cold water input pipe 181 of the hot water storage container 18 and the hot water produced by the hot water storage container 18 are in an automatic mixing state of the same chamber (device) to make cold water It is easy to mix with hot water, causing the hot water outlet pipe 182 to often experience insufficient water supply temperature.

2. The hot water outlet pipe 182 is mostly located at the outer top of the hot water storage container 18, which not only affects the overall appearance, but also is very obstructive and inconvenient on the connecting pipeline.

In view of this, the present invention provides a heat storage method for a hot water device, which can store The interior of the heat container is naturally stratified according to the water temperature and avoids vertical fluid disturbance to improve the efficiency of hot water storage temperature, which can effectively prevent cold water (low temperature hot water) and hot water from automatically mixing, and avoid insufficient hot water temperature. Not available.

To this end, the present invention provides a method for storing heat in a hot water device. The hot water device takes an air-conditioning water heater as an example. The air-conditioning water heater is connected to a hot water circulation circuit, and the hot water circulation circuit Connected to a heat storage container structure, the heat storage container structure at least includes: a heat storage container, a hot water output pipe connected from the hot water circulation circuit, a hot water input pipe, and a guide cover. The heat storage method of the hot water device of the present invention includes the following steps: maintaining microporous water injection: introducing hot water into the heat storage container from the microporous water injection section of the hot water input pipe, and maintaining the level of water injection. Guide water injection: The guide cover covering the micro-hole water injection section of the hot water input pipe guides the injected hot water and divides the flow into: a higher temperature hot water flow and a lower temperature hot water flow. Keep the water out of the micropores: make the higher-temperature hot water flow out of the heat storage container through one of the micro-pore water outlet sections of the hot water outlet pipe, and keep the water out horizontally. Wherein, the hot water outlet pipe is connected to at least one use end; the microporous water outlet section of the hot water outlet pipe is located above the microporous water injection section of the hot water inlet pipe; the open end of the guide cover faces the hot water outlet pipe The microporous outlet section.

1: Air conditioning water heater

11: Compressor

12: Outdoor heat exchanger

13: Fan motor

14: Dry filter

15: Refrigerant flow controller

16: Indoor heat exchanger

17: Fan motor

18: Hot water storage container

181: Cold water input pipe

182: Hot water outlet pipe

2: Air-conditioning hot water machine

26: heat storage container

261: hot water pump

262: control valve

27, 28: Guide cover

272, 282: open end

29: Orifice plate

291: Perforation

A0: Air conditioning zone

L: Hot water circulation circuit

L1: Hot water input pipe

L11: Outer pipe section

L12: Water injection hole

L2: Return pipe

L21: Top section

L22: Drain hole

L23: Cold water supply pipe

L3: Hot water outlet pipe

L31: Top section

L32: Outlet

M: Controller

T, T1, T2, T3: temperature sensor

A: Higher temperature hot water flow

B: Lower temperature hot water flow

S10, S20, S30~S32, S40~S42, S50~S52, S60~S65, X, S30’, S40’, X’: steps

Figure 1 is a system diagram of a conventional air-conditioning and hot water maker; Figure 2 is a flowchart of the heat storage method of a hot water device of the present invention; Figure 3 is a flowchart of one embodiment of step S30 in Figure 2 Fig. 3A is a flowchart of another embodiment of step S30 in Fig. 2; Fig. 4 is a flowchart of one embodiment of step S40 in Fig. 2; Fig. 4A is a flowchart of step S40 in Fig. 2 Flow chart of another embodiment; Figure 5 is a system diagram of a heat storage container structure that matches the heat storage method of a hot water device of the present invention; Figure 6 is a cross-sectional view of the first embodiment of the heat storage container structure in Figure 5; Figure 7 is Figure 4A is a cross-sectional view of the second embodiment of the heat storage container structure; Figure 8 is a cross-sectional view of the third embodiment of the heat storage container structure in Figure 3A; A flow chart of a temperature control process S50 of a heat storage method for a water device; Fig. 10A is a flowchart of one embodiment of a step X in Fig. 9; Fig. 10B is a flowchart of the step X in Fig. 9 A flowchart of another embodiment; and FIG. 11 is a flowchart of a temperature control process S60 of the heat storage method of the hot water device of the present invention in accordance with the present invention.

The following is a detailed description of the specific embodiments of the present invention with the description of the figures and figure numbers: please refer to Figure 2 of the heat storage method of the hot water device of the present invention, which includes: maintaining the micropores and injecting water (step S10); Water is injected (step S20); water is kept from the micropores (step S30); and water is kept from the micropores (step S40). Please also refer to Figures 5 and 6, which are system diagrams of the heat storage method of the hot water device of the present invention applied to a heat source system 2 and a heat storage vessel 26. In the present invention, the heat source system 2 is air-conditioned. Take a hot water machine as an example, and connect a hot water circulation loop L and a controller M. The heat storage container 26 is provided with a hot water input pipe L1, a return pipe L2, a hot water output pipe L3, a guide cover 27, and a temperature sensing group T connected from the hot water circulation circuit L. . Among them, "hot water input" is defined as the transmission direction from the heat source system 2 to the heat storage container 26; the "return pipe L2" is defined as the transmission direction from the heat storage container 26 to the heat source system 22; "Water output" defines It is the transfer direction from the heat storage container 26 to the outside.

Therefore, in step S10 of the heat storage method of the hot water device of the present invention, hot water is introduced into the heat storage container 26 through the microporous water injection section of the hot water input pipe L1, and the water injection is maintained horizontally. In step S20: the guide cover 27 covering the micro-hole water injection section of the hot water input pipe L1 guides the injected hot water, and separates the hot water stream A and the lower temperature hot water stream B . In step S30: referring to FIG. 3 at the same time, including step 32, the higher-temperature hot water stream A is output from the heat storage container 26 through the microporous water outlet section of the hot water output pipe L3. And referring to Fig. 4 at the same time, in step S40, step 42 is included to make the lower-temperature hot water stream B pass through the microporous drainage section of the return pipe L2. In this way, water is injected and discharged through the micropores, so that the injected and discharged water is automatically layered according to temperature and can be naturally divided, and the guide cover 27 guides the water flow to flow stably.

To make it easier to understand the implementation of the heat storage method of the hot water device of the present invention, the heat source system 2 is first specifically described as follows: one end of the hot water input pipe L1 extends to the inside of the heat storage container 26 to form an outer pipe section L11; The pipe section L11 is provided with a plurality of water injection holes L12 at intervals to form the aforementioned microporous water injection section. Compared with the outer pipe section L11, the hot water outlet pipe L3 has a smaller diameter than the outer pipe section L11, so that the hot water outlet pipe L3 can penetrate the outer pipe section L11; The end of L11 is closed, which not only makes the hot water input pipe L1 and the hot water output pipe L3 form a double pipe structure with sufficient bonding strength, but also controls the hot water to be slowly introduced into the guide cover 27 through the water injection hole L12. With the water injection hole L12 of the outer pipe section L11, the flow rate of hot water injection can be slowed down, and the hot water can be injected horizontally, so as to avoid vertical fluid disturbance in the heat storage container 26 during water injection, and further make the heat storage The fluid inside the container 26 maintains stratification according to different temperatures (such as warmer hot water A, higher temperature hot water flow B).

The hot water outlet pipe L3 supplies hot water to the outside, and the hot water outlet pipe L3 is located outside The upper part of the end of the pipe section L11 is defined as a top section L31, the end of the top section L31 can be closed, and the pipe body of the top section L31 has a plurality of water outlet holes L32, forming the aforementioned microporous water outlet section. The closed end of the top section L31 allows the higher-temperature hot water flow A to be introduced into the hot water outlet pipe L3 at a slow speed and horizontally only through the water outlet L32. . With the water outlet L32 of the top section L31, the output flow rate of the higher-temperature hot water stream A can also be slowed down, and the higher-temperature hot water stream A can be kept horizontally output, so as to prevent the water storage in the heat storage container 26 from occurring vertically. Fluid disturbance.

The guide cover 27 is tapered; one end is fixed to the outer pipe section L11 of the hot water input pipe L1, and the other end forms an open end 271 toward the end of the outer pipe section L11 of the hot water input pipe L1. The guide cover 27 can form a coincident section outside the outer pipe section L11; the coincident section is usually located below the top section L31 of the hot water outlet pipe L3, and the microporous water injection section of the outer pipe section L11 is located at The guide cover 27 covers the overlapping section. The hot water introduced into the guide cover 27 from the outer pipe section L11 water injection hole L12 is gradually rectified in the guide cover 27, and a higher-temperature hot water flow A flows in the direction of the water outlet L32, and a lower-temperature hot water flow B flows from The guide cover 27 overflows at the open end 271 and sinks downward.

The return pipe L2 extends from the heat storage container 26 near the bottom end and is connected to the hot water circulation circuit L; the pipe body of the return pipe L2 located inside the heat storage container 26 is defined as a top section L21, which A plurality of drain holes L22 are provided to form the aforementioned micro-hole drain section; and the end of the top section L21 is closed. The return pipe L2 is provided with a hot water pump 261 and a cold water supply pipe L23 connected to the hot water circulation circuit L; the cold water supply pipe L23 is provided with a control valve body 262 to control the supply of cold water.

With the water injection hole L12 of the outer pipe section L11, the flow rate of hot water injection can be slowed down, and the hot water can be injected horizontally, so as to avoid vertical fluid disturbance in the heat storage vessel 26 during water injection, and further enable the storage The fluid inside the heat container 26 keeps stratification according to different temperatures; the guiding The cover 27 has a rectifying effect on the water injection, and improves the efficiency of temperature stratification inside the heat storage container 26. As the temperature of the hot water injected by the water injection hole L12 increases, the higher-temperature hot water stream A will be stacked up successively and output from the water outlet L32, while the higher-temperature hot water stream B will gradually settle due to the heat storage container 26 The volume is limited, and hot water with insufficient temperature will be discharged through the drain hole L22.

In addition, in the heat storage container 26, the higher the temperature of the hot water, the higher the temperature level, so the highest point in the heat storage container 26 is the highest point of the temperature level. Therefore, the size of the heat storage container 26 can be designed according to requirements, and the height ruler is "meter", or the ruler level increases; wherein, preferably, the water injection hole L12 of the outer pipe section L11 is provided with The height h1 is lower than or equal to 1/3 of the vertical height of the heat storage container 26. The water outlet L32 of the hot water outlet pipe L3 is set at a height h2, which is lower than or equal to 4/5 of the vertical height of the heat storage container 26. The top section L21 of the return pipe L2 is set at a height h3 within the range of 5-30 cm (millimeter).

Referring to FIGS. 3A and 8 at the same time, the return pipe L2 and the hot water outlet pipe L3 are provided with an orifice plate 29 parallel to the upper part of the hot water outlet pipe L3. The orifice plate 29 has a plurality of perforations 291 allowing the higher temperature hot water flow A to pass through. Therefore, in a step S30', before step 32, it further includes step 31: guiding the higher-temperature hot water stream A to discharge water. In step 31, the higher-temperature hot water flow is passed through the horizontally arranged heat storage container 26 between the microporous water injection section of the hot water input pipe L1 and the microporous water outlet section of the hot water output pipe L3. The orifice plate 29 maintains a high-temperature hot water flow A through the plurality of perforations 291 of the orifice plate 29. The perforations 291 can also slow down the flow rate of the higher-temperature hot water flow A, so that disturbances can be avoided before the hot water is output, so as to maintain a stable and slow flow.

Refer to Figures 4A and 7 at the same time. Corresponding to the return pipe L2, a guide cover 28 is provided, which is also cone-shaped to guide the water flow; one end of the guide cover 28 is fixed with the return pipe L2 and the other end faces The top section L21 of the return pipe L2 forms an open end 281. The guide cover 28 is opposite to the return pipe L2 The top section L21 may form an overlapping section. Therefore, in a step S40', before step 42 it further includes step 41: guiding the lower temperature hot water stream B to discharge water. In step 41, the guide cover 28, which is arranged in the heat storage container 26 and covers the microporous drain section of the return pipe L2, guides the lower temperature hot water flow B. In the same way, the design of the drain hole L22 enables the water flow at the top section L21 of the return pipe L2 to discharge slowly and horizontally; during the flow of low-temperature hot water/cold water, the guiding energy of the guide cover 282 is stable. water.

Referring again to FIGS. 5 and 6, the temperature sensing group T is arranged inside the heat storage container 26 to detect the internal water temperature of the heat storage container 26. The temperature sensing group T includes at least one temperature sensor, which is located adjacent to the end of the return pipe L21 or the end of the outer pipe section L11. By obtaining the temperature measured by the temperature sensor, the controller M can perform the hot water pump 261 controls heating. The temperature sensing group T may include three temperature sensors T1, T2, T3, which are respectively located adjacent to the end of the outer pipe section L11, adjacent to the end of the hot water outlet pipe L3, and adjacent to the end of the return pipe L21; therefore, three Each temperature sensor T1, T2, T3 can obtain the water temperature at different stages.

Also refer to Figure 9, which is one of the embodiments of the present invention. The controller M can obtain the temperature of the temperature sensors T1~T3. In the flowchart of Figure 2, a temperature control process S50 can be added to a temperature The control step X is set between steps S20 and 30, after step S30, or after step S40. As shown in Fig. 10A, the temperature control step X includes: step S51, judging whether the acquired temperature reaches a preset temperature; if it is not the preset temperature, go to step S52, which may be to control the heating of the hot water pump 261 , Or remind to inject cold water, and then change the water injection temperature in step S10; if the preset temperature is reached, no heating is performed. In a temperature control step X'of FIG. 10B, step S51 is included; and if the preset temperature is not reached, step S52 is entered, and if the preset temperature is reached, step S10 is returned.

In addition, refer to a temperature control process S60 in FIG. 11, which is another embodiment of the present invention. The temperature sensing group T also includes three temperature sensors T1, T2, T3, and the controller M at least obtains the single temperature of the temperature sensor T3 or the combined temperature of the temperature sensors T1 and T3. , Or all the temperatures of the temperature sensors T1, T2, T3, and the results of T1, T2, T3 are individually or calculated, and the hot water heat exchanger 22 is controlled to be heated or turned off. The temperature control process S60 has steps S61, S62, and S63 after steps S20, S30, and S40 respectively to obtain the temperature; and in step S64, the obtained temperature is fed back to the controller M, and step S64 is performed to obtain the temperature Calculate individually or in combination to determine whether it has reached a preset temperature; if it is not the preset temperature, go to step S65: change the water injection temperature in step S10, which can be changed by controlling the heating of the hot water pump 261 or reminding to inject cold water If the preset temperature is reached, the temperature control process S60 can enter the next step, and this step is not limited to directly returning to step S10.

In this regard, the heat storage method of the hot water device of the present invention uses micro-hole water injection to maintain horizontal water injection and avoid vertical fluid disturbances, so that the water can be automatically layered according to temperature and guided by the guide cover To form a natural diversion.

In addition, the double pipe structure of the present invention has the advantages of lower space occupancy rate and relatively stable structural strength compared with conventional air-conditioning water heaters; and the top section L31 of the hot water outlet pipe L3 is also designed with sufficient length Ensure that the temperature of the hot water entering the outlet hole L32 of the hot water outlet pipe L3 is high enough so that the hot water can stably flow upwards into the hot water outlet pipe L3, thereby keeping the hot water inside the hot water outlet pipe L3 at a certain level High temperature can also prevent the lower temperature hot water stream B (the hot water temperature is insufficient) from being troubled by the output.

In summary, the present invention can effectively solve the shortcomings of conventional air-conditioning water heaters. The use of the present invention can effectively prevent the low-temperature hot water flow (or insufficient hot water temperature) from being troubled by the output and use, and achieve the improvement of the hot water storage temperature. Efficiency, and thus have practical and progressive benefits.

S10, S20, S30, S40‧‧‧Step

Claims (10)

A heat storage method for a hot water device includes: maintaining microporous water injection: introducing hot water from a microporous water injection section of a hot water input pipe into a heat storage container, and maintaining the level of water injection; guiding water injection: A guide cover in the heat storage container and covering the microporous water injection section of the hot water input pipe guides the injected hot water and forms a hot water flow with a higher temperature and a hot water flow with a lower temperature; and maintains the micropores Outlet water: the higher-temperature hot water flow is output from the heat storage vessel through the microporous outlet section of a hot water outlet pipe, and the water outlet is maintained horizontally; wherein, the hot water inlet pipe is connected to a hot water circulation loop, and the heat The water outlet pipe is connected to at least one use end; the microporous water outlet section of the hot water outlet pipe is located above the microporous water injection section of the hot water inlet pipe; the open end of the guide cover discharges water toward the microholes of the hot water outlet pipe segment. The heat storage method of a hot water device according to claim 1, wherein the water injection holes of the hot water input pipe and/or the water outlet holes of the hot water output pipe are plural and arranged at intervals. The heat storage method of a hot water device according to claim 1, wherein: the hot water input pipe and the hot water output pipe have a double pipe structure and are arranged along the vertical direction of the heat storage container. The heat storage method of the hot water device described in claim 1, wherein: the micro-hole water injection section of the hot water input pipe is lower than or equal to 1/3 of the vertical height of the heat storage container. The heat storage method of the hot water device described in claim 1, wherein: the microporous water outlet section of the hot water outlet pipe is lower than or equal to 4/5 of the vertical height in the heat storage container. The heat storage method of the hot water device described in claim 1 further includes: maintaining the microporous water discharge: let the lower temperature hot water flow through the microporous water discharge section of a return pipe Water to maintain a horizontal drain; wherein, the return pipe is connected to the hot water circulation loop. The heat storage method of a hot water device according to claim 6, wherein the drain holes of the return pipe are plural and arranged at intervals. For example, the heat storage method of the hot water device of claim 6, further comprising: guiding the flow of lower temperature hot water to discharge: from the heat storage container covering the microporous drain section of the return pipe A guide cover guides the flow of the lower temperature hot water. For example, the heat storage method of the hot water device described in claim 1 or 8, further comprising: guiding the higher-temperature hot water to flow out of the water: allowing the higher-temperature hot water flow to pass horizontally in the heat storage container and located in the An orifice plate between the microporous water injection section of the hot water input pipe and the microporous water outlet section of the hot water output pipe maintains the higher temperature hot water flow through the plurality of perforations of the orifice plate. The heat storage method of the hot water device as described in claim 1 or 6, further comprising: detecting water temperature: a temperature sensing group arranged in the heat storage container is located near the hot water outlet pipe. The hole water outlet section or the micro-hole water injection section adjacent to the hot water input pipe detects the temperature of the higher temperature or lower temperature hot water stream.

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