Anti-freezing gas water heater wall-hanging stove hot water system capable of discharging hot water when valve is opened

Abstract

The utility model relates to an anti-freezing gas water heater wall-hanging stove hot water system capable of discharging hot water when a valve is opened. The anti-freezing gas water heater wall-hanging stove hot water system consists of a gas water heater wall-hanging stove, a heating group, a plurality of multifunctional heat preservation expansion water tanks, a double-control faucet and a tap water electromagnetic valve, no problem exists when the anti-freezing gas water heater is installed indoors and outdoors, the multifunctional hot water heat preservation expansion water tank is installed in a face washing cabinet and a dish washing cabinet, so that the water heater and the heat preservation water tank cannot be seen indoors, a circulating pump cannot be seen indoors, the indoor environment is clean and tidy, no water exists in a pipeline in a standby state, freezing resistance is achieved, and energy is saved. And hot water can be discharged at any time when the valve is opened.

Description

Technical Field

[0001] The invention relates to a gas water heater, in particular to a quick-heating antifreeze gas water heater wall-mounted boiler which can be installed both indoors and outdoors. Background Art

[0002] The existing commonly used gas water heaters must be installed indoors. Although they are large and unsightly when hung on the wall indoors, there is no other way, because the existing gas water heaters are not antifreeze. If they are installed outdoors in cold weather, the machine will be frozen. Therefore, people hope to have an antifreeze gas water heater so that people can install it on the outdoor wall, which is safe and does not affect the indoor space. At the same time, they also hope that hot water can be discharged as soon as the valve is opened. Summary of the invention

[0003] We know that if we want to install a gas water heater outdoors, we must solve the problem of antifreeze. When the gas water heater is not in use, the water heater is shut down and the water path inside the water heater is full of water. When encountering extreme weather, if the water heater is installed outdoors, the water in the water path inside will freeze, and the water path pipes will be broken by the ice, causing damage to the machine. There are also cases of fires in gas water heaters. Although the probability is one in ten thousand, it has been reported by the media. Therefore, there are two advantages to moving the gas water heater outdoors: the first is that it does not occupy indoor space and does not affect the indoor appearance; the second is to completely prevent the occurrence of fires.

[0004] The present application provides a method for partially emptying the water pipes of a gas water heater system to solve the antifreeze problem of the water heater, while also achieving the effect of hot water output when the valve is opened. The present application is done in this way: only one set of copper tube heat exchangers is set on the burner in the gas water heater wall-mounted boiler, and a three-way solenoid valve is connected to the output end of the copper tube heat exchanger. The hot water output of the copper tube heat exchanger is divided into domestic hot water output and heating hot water output through the three-way valve. The three-way solenoid valve either turns on the domestic hot water and turns off the heating hot water, or turns on the heating hot water and turns off the domestic hot water (the gas wall-mounted boilers on the market are composed of two sets of copper tube heat exchangers, namely the heating heat exchanger and the hot water heat exchanger, wherein the inlet of the hot water heat exchanger is connected to the tap water pipe and the inlet of the heating heat exchanger is connected to the tap water pipe through the water supply valve). An automatic air inlet / exhaust valve is set at the highest point of the internal water pipe of the gas water heater wall-mounted boiler. Its function is to turn on the air in the pipe when the water in the pipe stops flowing. Water has a tendency to move downward under the action of its own gravity. At this time, air will enter the pipe from the highest point through the automatic air intake / exhaust valve, and the water in the cold water pipe will flow into the water tank inner tank through the circulation pump, and the hot water in the heat exchange copper tube and the hot water pipe will all flow into the water tank inner tank through the hot water pipe. This completes the automatic emptying process of the heat exchange copper tube, cold water pipe and hot water pipe. When the water in the pipe is flowing, the air in the water will move to the highest point of the cold water pipe with the water flow and will be automatically discharged through the automatic air intake / exhaust valve. It can be seen that the air intake / exhaust valve will deliver air into the pipe when the water in the pipe has no pressure, and will discharge air to the outside when the water in the pipe flows under pressure. Therefore, it can automatically deliver air to the pipe or discharge the air in the pipe. A heating insulation expansion water tank and one or two hot water insulation expansion water tanks are arranged in the washbasin or sink at the end of the heating and hot water system or under the indoor wall-mounted boiler. The heating insulation expansion water tank in the heating system separated by a three-way solenoid valve is composed of three major parts: an outer shell, an inner tank and a built-in circulation pump. The inner tank is a double-layer structure, the outer layer of the inner tank is a pressure-bearing hard shell, and the inner layer of the inner tank is a non-pressure-bearing expandable and contractible rubber film bag or plastic film bag. The shape of this film bag is the same as that of the outer shell of the inner tank but is separated from it. The film bag is not pressure-bearing, and the internal pressure is borne by the outer hard shell. The membrane bag is able to expand and contract freely. When the membrane bag is fully expanded, it can fill the inner shell of the inner tank. The membrane bag should store most of the empty water in the heat exchange copper tube and the hot and cold water pipes. A one-way exhaust valve is set at the top of the membrane bag in the water tank inner tank. The one-way exhaust valve is connected to the external atmosphere. When there is air in the membrane bag, it will be discharged into the air outside the water tank through the one-way exhaust valve in time. If there is no one-way exhaust valve, the membrane bag will be quickly filled with air and the system will not work properly. There is a small air duct on the upper part of the hard shell of the inner tank, so that when the membrane bag expands upward, the air in the upper space will be discharged through the air duct.When the film bag contracts downward, the air will enter the outer shell of the inner tank through the air guide tube, allowing the film bag to contract smoothly. A thermostat is set in the middle of the inner tank. The function of the thermostat is to control the start of the circulation pump when the water in the insulation water tank is lower than the set temperature, and form circulating water between the cold water pipe, water heater, heating pipe and heating group until the water temperature rises to the set temperature before stopping. There is also a water level controller on the side of the film bag. The water level controller controls the filling of water into the heater so as not to fill the film bag. A certain space is reserved for emptying. There is also an inner A circulating pump is installed, the water inlet of the circulating pump is connected to the inner tank membrane bag, the water outlet of the circulating pump is connected to the cold water pipe of the gas water heater, and the other side of the inner tank membrane bag is connected to the return water of the heater. The circulating pump is arranged in the water tank to eliminate noise and make the system installation simpler. More importantly, the built-in circulating pump must be arranged at the bottom of the water tank inner tank to ensure that there is always water in the circulating pump and to ensure the normal operation of the circulating pump; and the hot water insulation expansion water tank in the other domestic hot water system separated by the three-way solenoid valve is also composed of three major parts: the outer shell, the inner tank and the built-in circulating pump. The inner tank is also a double-layer structure like the heating insulation expansion tank. There is also a one-way exhaust valve at the top of the membrane bag of the inner tank, and there is also a thermostat in the middle of the built-in circulation pump of the inner tank. The water inlet of the circulation pump is also connected to the inner tank membrane bag, and the water outlet of the circulation pump is also connected to the cold water pipe of the gas water heater and the double-control faucet. The double-control faucet is a manual faucet that can output electrical control signals. There is a set of conductive contacts and contacts in the faucet, one on the handle shaft and the other on the faucet base. There is a dot-shaped conductive contact on the handle shaft of the faucet, and a semi-circular conductive contact on the base of the faucet. When the handle is turned, the two conductive contacts and contacts are in contact with each other, which will open the built-in circulation pump and the tap water solenoid valve at the same time. After the built-in circulation pump is started, a certain negative pressure will be generated in the membrane bag to reduce the volume of the membrane bag. The heating circuit and the hot water circuit are two systems that can only be operated separately and cannot work at the same time. The working scene of the hot water thermostat is the same as that of the heating thermostat. ,

[0005] Therefore, the gas water heater wall-mounted boiler hot water system of the device, which automatically empties and opens the valve to discharge hot water, is composed of a gas water heater or a wall-mounted boiler, a heating group, two or more multifunctional thermal expansion water tanks, a double-controlled faucet and a tap water solenoid valve, etc., wherein the gas water heater has not only the basic configuration of an ordinary gas water heater, but also an automatic exhaust / intake valve is specially arranged at the highest point of the cold water interface of the copper tube heat exchanger, and a three-way solenoid valve is connected to the hot water outlet of the copper tube heat exchanger, one outlet of the three-way solenoid valve is connected to the domestic hot water interface, and the other outlet is connected to the domestic hot water interface. Heating and hot water interface, the multifunctional thermal insulation expansion water tank is divided into a heating multifunctional thermal insulation expansion water tank and a hot water multifunctional thermal insulation expansion water tank, wherein the heating multifunctional thermal insulation expansion water tank is composed of a pressure-bearing outer shell, a membrane bladder liner and a built-in circulation pump, a one-way exhaust valve, a water level controller and a thermostat are arranged on the membrane bladder, a vent pipe is arranged on the outer shell, the water inlet of the built-in circulation pump is connected to the lower part of the membrane bladder, and the water outlet of the built-in circulation pump is connected to the cold water pipe; wherein the hot water multifunctional thermal insulation expansion water tank is composed of a pressure-bearing outer shell, a membrane bladder liner and a built-in circulation pump, a one-way exhaust valve, a water level controller and a thermostat are arranged on the membrane bladder, a vent pipe is arranged on the outer shell, the water inlet of the built-in circulation pump is connected to the lower part of the membrane bladder, and the water outlet of the built-in circulation pump is connected to the cold water pipe; To the exhaust valve and thermostat, there is a vent pipe on the outer shell, the water inlet of the built-in circulation pump is connected to the lower part of the film bag, the water outlet is connected to the cold water pipe, the hot water end of the heating group is connected to the heating end of the three-way solenoid valve, the return water end of the heating group is connected to the lower part of the film bag of the heating multifunctional thermal insulation expansion water tank, the hot water end of the three-way solenoid valve is connected to the lower part of the film bag of the hot water multifunctional thermal insulation expansion water tank, and the water inlet of the built-in circulation pump is connected to the lower part of the film bag, the water outlet is connected to a tee, the other end of the tee is connected to the double-control faucet, and another end of the tee is connected to the cold water The cold water pipe is connected to the tap water solenoid valve. The built-in circulation pump in the heating multifunctional thermal insulation expansion water tank is controlled by the thermostat. The water level controller can control the tap water solenoid valve only when the heating is filled with water; the built-in circulation pump in the hot water multifunctional thermal insulation expansion water tank can be controlled by the double-control faucet or by the thermostat, and the double-control faucet controls the built-in circulation pump while controlling the tap water solenoid valve. The one-way exhaust valve and membrane bag in the heating multifunctional thermal insulation expansion water tank and the hot water multifunctional thermal insulation expansion water tank are crucial components for the system to complete the emptying.

[0006] The best two-way automatic intake / exhaust valve is Figure 2 The valve body of the structure shown in the figure has a relatively light valve ball in the valve body. When air and water enter the valve from the lower port together, the air will smoothly bypass the valve ball and be discharged from the upper port, and the subsequent water will float the valve ball and pile it in the sealing ring, thereby closing the channel. When the water level in the valve drops, the valve ball leaves the sealing ring and the channel opens, and at this time the upper and lower ports are connected to each other.

[0007] The one-way exhaust valve is best used as follows Figure 3The valve body of the structure shown in the figure has a two-way automatic air inlet / exhaust valve structure and a one-way valve composed of a lightweight valve plate at the upper outlet position. The one-way valve can ventilate air upward as well as water. The valve ball and the valve plate can cooperate to realize the one-way upward exhaust function. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is the schematic diagram of the antifreeze gas water heater and gas wall-mounted boiler hot water system that can produce hot water as soon as the valve is opened

[0009] In the figure, 1 gas water heater 2 gas input 3 two-way automatic air intake / exhaust valve 4 gas water heater main control board 5 copper tube heat exchanger 6 three-way solenoid valve 7 hot water pipe 8 heating pipe 9 cold water pipe 10 heating group 11 ventilation pipe 12 water level controller 13 thermostat 14 one-way exhaust valve 15 film bag 16 multi-functional thermal insulation expansion tank 17 water tank liner 18 built-in circulation pump 19 tap water solenoid valve 20 double-control faucet.

[0010] Figure 2 It is a schematic diagram of a two-way automatic intake / exhaust valve.

[0011] Figure 3 It is a schematic diagram of a one-way exhaust valve. DETAILED DESCRIPTION

[0012] according to Figure 1 Principle configuration After adjusting the entire system, let's now describe in detail the shutdown, emptying and working process of the gas hot water wall-mounted boiler system:

[0013] (I) Working process of the heating system (the three-way solenoid valve turns on the heating system)

[0014] (1) Standby state when stopped: During the initial water injection process of the heating system, the water level control switch opens the tap water solenoid valve to inject water into the system. When the reserved space is reached in the membrane capsule, the tap water solenoid valve stops working. At this time, the reserved space in the membrane capsule is just the volume that can accommodate the empty water, and the hot water system can enter the standby state. When the built-in circulation pump works and then stops working, the water in the circulation pipe loses the circulation pressure and tends to move downward under the action of its own gravity. At this time, the two-way automatic air intake / exhaust valve at the highest point of the circulation pipe automatically inputs air into the pipe, so the cold water in the cold water pipe flows into the membrane capsule through the built-in circulation pump under the action of gravity, and the hot water in the copper tube heat exchanger and the heating pipe flows into the membrane capsule through the return pipe, so that the water in the cold water pipe, the copper tube heat exchanger and the heating pipe is automatically discharged into the membrane capsule, and the heating system enters the standby state. Because there is no water in the gas water heater and the cold and hot water pipes, the water heater has anti-freezing ability.

[0015] (2) Heating working state: When the water temperature drops to the set temperature, the thermostat controls the built-in circulation pump to start working. The circulation pump draws the water in the membrane bag into the cold water pipe. At the same time, the membrane bag shrinks inward. The air in the cold water pipe is automatically discharged from the body through the two-way automatic air intake / exhaust valve, and the air in the copper tube heat exchanger and the heating pipe is squeezed into the membrane bag. The air squeezed into the membrane bag is smoothly discharged from the body through the one-way exhaust valve. Therefore, the water in the heating system flows through the gas water heater under the action of the built-in circulation pump. The flowing water pressure triggers the water heater to ignite. The hot water is continuously circulated and heated until the water temperature reaches the highest set temperature, and the built-in circulation pump stops working. After the circulation pump stops working, the water in the cold water pipe copper tube heat exchanger and the heating pipe will flow into the membrane bag again, completing the system emptying.

[0016] (II) Working process of hot water system (three-way solenoid valve opens the hot water system)

[0017] (1) Insulation standby state when work is stopped: At this time, the water in the cold water pipe copper tube heat exchanger and the heating pipe is drained.

[0018] (2) When the thermostat in the hot water insulation expansion tank senses the lowest set temperature, the built-in circulation pump is started, and the water in the membrane bag is pumped into the cold water pipe by the circulation pump. The membrane bag shrinks inward and the air in the cold water pipe is automatically discharged into the atmosphere through the two-way automatic air intake / exhaust valve, while the air in the copper tube heat exchanger and the hot water pipe is squeezed into the membrane bag. The air entering the membrane bag is smoothly discharged into the atmosphere through the one-way exhaust valve again. Under the action of the circulation pump, the water flow is continuously circulated and heated in the hot water system until the water temperature reaches the highest set temperature, and the built-in circulation pump stops working. After the circulation pump stops working, the water in the cold water pipe copper tube heat exchanger and the heating pipe will flow into the membrane bag again, completing the system emptying.

[0019] (3) When the user turns on the dual-control faucet, the tap water solenoid valve and the built-in circulation pump will be triggered to work at the same time. The tap water flows into the cold water pipe and the air in the cold water pipe is automatically discharged into the atmosphere through the two-way automatic air intake / exhaust valve. The air in the copper tube heat exchanger and the hot water pipe will be squeezed into the membrane bag and then smoothly discharged into the atmosphere through the one-way exhaust valve. The cold water in the cold water pipe flows through the water heater and is heated. The heated hot water will be replenished into the membrane bag. At this time, the hot water in the membrane bag flows out through the dual-control faucet under the combined action of the circulation pump and tap water pressure for user use. After starting, the circulation pump will generate a circulation pressure on both the dual-control faucet and the cold water pipe. The circulation pressure of the cold water pipe upward blocks the tap water from flowing directly into the water tank. The tap water can only flow through the gas water heater hot water pipe, the water tank inner tank circulation pump and finally be discharged from the faucet.

[0020] There is no problem in installing the antifreeze gas water heater indoors or outdoors. When the gas water heater is installed outdoors, drill two holes on the wall below the gas water heater for the cold water pipe and the hot water pipe respectively, and then connect the two pipes to the water heater, install the water heater operation display box on a suitable wall indoors, and then connect the gas water heater to the operation display box with a cable. The multifunctional hot water insulation expansion water tank is installed in the washbasin and the dishwasher, and the multifunctional heating insulation expansion water tank can be installed in any hidden place indoors. In this way, the water heater and insulation water tank cannot be seen indoors, and the circulation pump cannot be seen, and the room looks tidy. A special heating / hot water conversion button is set on the operation display box.

Claims

1. The antifreeze gas water heater wall-mounted boiler hot water system that can produce hot water as soon as the valve is opened is composed of a gas water heater wall-mounted boiler, a heating group, multiple multifunctional thermal expansion tanks, a double-control faucet and a tap water solenoid valve. It is characterized by The gas water heater wall-mounted boiler is provided with an automatic exhaust / intake valve at the highest point of the cold water interface of the internal copper tube heat exchanger, and a three-way solenoid valve is connected to the hot water outlet of the copper tube heat exchanger, one outlet of the three-way solenoid valve is connected to the domestic hot water interface, and the other outlet is connected to the heating hot water interface; the multiple multifunctional thermal insulation expansion water tanks are divided into a heating thermal insulation expansion water tank and multiple hot water thermal insulation expansion water tanks, wherein the heating thermal insulation expansion water tank is composed of a water tank shell, a water tank liner and a built-in circulation pump, the water tank liner is a double-layer structure, wherein the outer layer is a pressure-bearing inner liner shell, and the inner layer is a film capsule, the shape of the film capsule is the same as that of the inner liner shell, and the inner liner shell and the inner liner film capsule are It is separated without sticking, and a one-way exhaust valve, a water level controller and a thermostat are arranged on the film capsule, a vent pipe is arranged on the outer shell of the inner tank, the water inlet of the built-in circulation pump is connected to the lower part of the film capsule, and the water outlet of the built-in circulation pump is connected to the cold water pipe; the hot water insulation expansion tank is also composed of a water tank outer shell, a water tank inner tank and a built-in circulation pump, wherein a one-way exhaust valve and a thermostat are arranged on the film capsule, and a vent pipe is also arranged on the outer shell, the water inlet of the built-in circulation pump is connected to the lower part of the film capsule, and the water outlet is connected to a tee, wherein the other port of the tee is connected to a double-control faucet, and another port of the tee is connected to the cold water pipe, and the cold water pipe is connected to the tap water pipe through the tap water solenoid valve; the double-control faucet must control the start-up and operation of the built-in circulation pump and the tap water solenoid valve at the same time.

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