WO2017133241A1

WO2017133241A1 - Gas water heating device, gas water heating system, gas water heater and water heating device

Info

Publication number: WO2017133241A1
Application number: PCT/CN2016/098279
Authority: WO
Inventors: 邱步; 毕大岩; 蔡茂虎; 魏爱国
Original assignee: 艾欧史密斯(中国)热水器有限公司
Priority date: 2016-02-01
Filing date: 2016-09-07
Publication date: 2017-08-10
Also published as: CN105546803A; CN105546803B

Abstract

Provided are a gas water heating device, a gas water heating system, a gas water heater and a water heating device. The gas water heating device comprises: a heat exchanger (1) having a water inlet and a water outlet; a combustion device (2) for heating water in the heat exchanger (1), the combustion device (2) having a first operation mode in a first output power range and a second operation mode in a second output power range, the first output power range being less than 4000 kW; a water pump (3) communicating with the heat exchanger (1); and a control device (4) connected with the combustion device (2) and the water pump (3). The gas water heating device has a preheating circulation mode. The preheating circulation mode comprises: controlling, by the control device (4), the water pump (3) to drive the water in the heat exchanger (1) to flow; and controlling the combustion device (2) to be in the first operation mode. The gas water heating device can reduce the number of times of starting the combustion device and the water pump, lower sounds generated by itself, and enable the temperature of water supplied thereby to remain stable.

Description

Gas hot water device, gas hot water system, gas water heater and hot water device

Cross reference related reference

The present application claims priority to Chinese Patent Application No. 2016100711464, entitled "Gas Water Heater, Gas Water Heater, Gas Water Heater, and Hot Water Device", filed on February 1, 2016, the application of which is incorporated herein by reference. Into this article.

Technical field

The present application relates to the field of hot water technology, and in particular to a gas hot water device, a gas hot water system, a gas water heater and a hot water device.

Background technique

Existing hot water devices (gas water heaters, heating stoves, and electric water heaters) often form a circulation line through a return pipe to avoid waste and inconvenience to the user. The water in the circulation line is heated by the hot water device, so that when the user uses the hot water, it is not necessary to discharge the normal temperature water or the low temperature water in the pipeline between the hot water device and the water terminal, and the hot water can be used at any time.

In the prior art, when the hot water device is circulating, because the heating power of the hot water device is high, the water temperature of the water in the circulation pipeline often reaches or exceeds the set outlet water temperature faster, and the water heater device at this time The heating device in the unit stops heating and the circulation line stops circulating. However, once the heating and circulation are stopped, the temperature of the water in the circulation line will decrease again, and once the temperature of the water in the circulation line drops to a low level, the heating device and the water pump are restarted. The heating and water pump after the restarting will cause the temperature of the water in the circulation line to reach or exceed the set outlet temperature faster, and the heating device in the hot water device stops heating again. Therefore, in the prior art hot water device, in order to achieve the water temperature of the water in the circulation line, the water pump and the heating device must be frequently turned on and off. At the same time, in the process of circulating and stopping the circulation pipeline, the temperature of the water in the circulation pipeline changes in a relatively large range, which affects the comfort of the user. In addition, due to the hot water device, especially the gas water heater, large noise is generated during high power operation and frequent start and stop.

Application content

In order to overcome the above-mentioned drawbacks of the prior art, the technical problem to be solved by the present application is to provide a gas hot water device, a gas hot water system, a gas water heater, and a hot water device, which can solve at least one of the above problems.

The specific technical solution of the present application is:

The present application discloses a gas hot water device comprising: a heat exchanger having a water inlet and a water outlet; a combustion device for heating water in the heat exchanger, the combustion The device has a first operational mode of a first output power range and a second operational mode of a second output power range; the first output power range is less than 4 kilowatts; a water pump in communication with the heat exchanger; and the combustion a control device connected to the water pump; the gas hot water device has a preheat cycle mode, the preheat cycle mode: the control device controls the water pump to drive water flow in the heat exchanger, and controls The combustion device is in a first mode of operation.

The present application discloses a gas hot water system including: a heat exchanger having a water inlet and a water outlet; the water outlet is connected to a hot water pipeline at the water end; the water inlet is connected to the water a return water pipeline of the end; the hot water pipeline, the return water pipeline and the heat exchanger may be connected to form a circulation pipeline; a combustion device for heating water in the heat exchanger, the combustion device having a first output power a first mode of operation of the range, and a second mode of operation of the second output power range; a maximum value of the first output power range of less than 4 kilowatts; a water pump in communication with the heat exchanger; and the combustion apparatus and a control device for connecting a water pump; the gas hot water system has a preheat cycle mode, the preheat cycle mode comprising: the control device controlling the water pump to drive water flow in the heat exchanger, and controlling the combustion The device is in the first mode of operation.

The present application discloses a gas water heater comprising: a heat exchanger having a water inlet and a water outlet; a combustion device for heating water in the heat exchanger; the combustion device having a first output a first mode of operation of the power range, and a second mode of operation of the second output power range; a maximum value of the first output power range is less than 4 kilowatts; a stepless speed regulation disposed downstream of the combustion device along a direction of combustion smoke a water pump; a water pump in communication with the heat exchanger; a control device connected to the combustion device, the water pump, and the stepless speed control fan; the gas water heater has a preheat cycle mode, and the preheat cycle mode includes The control device controls the water pump to drive water flow in the heat exchanger, controls the combustion device to be in a first working mode, and controls the rotation speed of the stepless speed control fan to match the first working mode.

The present application discloses a hot water device including: a heat exchanger having a water inlet and a water outlet; a heating device for heating water in the heat exchanger; and the heat exchanger a connected water pump; a control device coupled to the heating device and the water pump; the hot water device having a preheat cycle mode, the preheat cycle mode comprising: the control device controlling the water pump to drive the heat exchange The flow of water in the device controls the heating device to be in a first mode of operation, the heating power of the first mode of operation being less than 4 Kw.

The gas water heater can reduce the number of starts of the combustion device and the water pump, can reduce the sound emitted by the gas water heater, and can maintain the temperature of the water outlet stable.

DRAWINGS

The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure. In addition, the shapes, proportions, and the like of the components in the drawings are merely illustrative and are used to help the understanding of the present application, and do not specifically limit the shapes and proportions of the components of the present application. Those skilled in the art, in the teachings of the present application, can implement the present application by selecting various possible shapes and ratios depending on the particular circumstances.

1 is a schematic structural view of an embodiment of a gas water heater according to the present application.

2 is a simplified schematic diagram of one embodiment of a gas hot water system of the present application.

Fig. 3 is a simplified schematic view showing another embodiment of the gas hot water system of the present application.

4 is a water temperature curve of a heat exchanger in a preheating cycle mode using the gas water heater of the present application and a water temperature curve of a heat exchanger in a preheating cycle mode of a gas water heater in the prior art; Comparison chart.

Fig. 5 is a structural schematic view of the distributor of the gas water heater of Fig. 1.

The above reference numerals are: 1, heat exchanger; 2, combustion device; 3, water pump; 4, control device; 5, stepless speed control fan; 6, distributor; 61, chamber; 62, solenoid valve 7, hose; 8, housing; 9, return water pipeline; 10, control department; 11, mixing valve; 12, hot water pipeline; 13, cold water pipe.

detailed description

The details of the present application can be more clearly understood from the description of the drawings and the description of the embodiments. However, the specific embodiments of the present application described herein are intended to be illustrative only and not to be construed as limiting the scope of the application. Those skilled in the art can devise any possible variations based on the present application, which are considered to be within the scope of the present application.

Referring to FIG. 1 , an embodiment of the present application discloses a gas hot water device including: a heat exchanger 1 having a water inlet and a water outlet; and water for the heat exchanger 1 a heating device 2 for heating, the combustion device 2 having a first operating mode of a first output power range, and a second operating mode of a second output power range; a maximum value of the first output power range being less than 4 kW; a water pump 3 in communication with the heat exchanger 1; a control device 4 connected to the combustion device 2 and the water pump 3; the gas water heater device has a preheat cycle mode, the preheat cycle mode includes: The control device 4 controls the water pump 3 to drive the flow of water in the heat exchanger 1, and controls the combustion device 2 to be in the first mode of operation.

The gas hot water device in the embodiment of the present application has a preheat cycle mode. When the gas hot water device is in the preheating cycle mode, the control device 4 in the gas hot water device can cause the water pump 3 to drive the water in the heat exchanger 1, thereby transferring the water and the circulation pipe in the heat exchanger 1. The water in the circulation is circulating. And the control device 4 in the gas hot water device is also The combustion device 2 can be operated in a first mode of operation, i.e., the combustion device 2 is operated at a lower output power, such as 1-3 kW. With the above structure, the gas water heater can also make the water pump in the preheating cycle, while ensuring that the water temperature of the water in the circulation line or the water temperature of the water in the heat exchanger 1 approaches the preheating target temperature. 3 continues to be in operation, and the combustion device 2 can also be kept in operation. The water temperature of the water in the circulation line or the water in the heat exchanger 1 can also be maintained at the preheating target temperature for a long time, and the fluctuation of the water temperature of the water in the circulation line or the water in the heat exchanger 1 is also small. Referring to FIG. 4, wherein the thick solid line is the temperature curve of the water in the heat exchanger 1 in the preheating cycle mode using the gas water heater of the present application, and the gas hot water device in the present application is used for preheating. The fluctuation of the temperature of the water in the heat exchanger 1 in the circulation mode is 4 degrees Celsius; the broken line is the temperature curve of the water in the heat exchanger 1 of the prior art gas water heater in the preheating cycle mode, and the existing In the technology, the temperature of the water in the heat exchanger 1 of the gas hot water heater in the preheating cycle mode is 8 degrees Celsius. 4, the temperature profile of the water in the heat exchanger 1 in the preheating cycle mode of the gas water heater of the present application is higher than that of the heat exchanger 1 in the preheating cycle mode of the prior art gas water heater. The temperature curve of the water in the water is more stable and basically stays at or maintains at the set temperature (50 degrees Celsius).

At the same time, since the sound of the gas-fired water heater is higher when the combustion device 2 is ignited and the water pump 3 is started, the gas-fired water heater in the embodiment of the present application reduces the number of ignitions of the combustion device 2 and the water pump 3 The number of starts, which in turn reduces the sound produced by the gas water heater during the preheat cycle. At the same time, the combustion device operates at a lower output power, and the gas hot water device emits a lower sound. It has been experimentally found that the sound of the prior art gas water heater in the preheating cycle mode is approximately between 47 and 53.5 decibels, and the sound of the gas water heater in the preheating cycle mode is substantially Between 40-44 decibels.

In order to cooperate with the combustion device 2 to operate at a lower output power, in order to avoid corrosion caused by the combustion device 2 generating more condensed water at a lower output power operation, the hood is made of stainless steel, thereby ensuring Safe to use. In order to improve the integration degree of the product, in the present embodiment, the gas hot water device includes a casing 8 in which the water pump 3 is located, and the outer diameter of the water pump 3 is less than 50 mm (mm). The operating flow rate of the water pump 3 is less than 5 L/MIN (liters per minute).

In the present embodiment, the water pump 3 is a variable frequency pump in order to make it possible for the water pump 3 to better control the flow rate therethrough. Through the stepless adjustment mode of the variable frequency water pump 3, the user for any pipeline can achieve the function of constant current circulation (about 3L/MIN) by adjusting the water pump 3. Therefore, the circulating water temperature is stable, the cycle time is short, and the user's hot water experience in the circulation section is improved.

When the gas hot water device is in the preheating cycle mode, the control device 4 controls the water pump 3 to drive the water in the heat exchanger 1 to operate at a preset flow rate. Specifically, the gas hot water device can be based on a user pipeline The information, the target temperature of the water, the temperature of the water in the circulation line, the combustion device 2, the output power of the combustion device 2, etc., calculate or give a preset flow rate with the best parameter ratio to output the output of the combustion device 2 Limited to the first output power range. When the gas hot water device is in the preheating cycle mode, the control device 4 can adjust the operating flow rate of the water pump 3 according to the preset flow rate. K For example, the preset flow rate is 3L/MIN. When the gas water heater is in the preheat cycle mode, when the flow rate of water in the circulation line is lower than 3 L/MIN, the water pump 3 can increase the flow rate of water in the circulation line until it reaches 3 L/MIN. When the gas water heater is in the preheat cycle mode, when the flow rate of water in the circulation line is higher than 3 L/MIN, the water pump 3 can reduce the flow rate of water in the circulation line until it reaches 3 L/MIN. It is calculated that the preset flow range can be 2-5L/MIN.

In the present embodiment, when the gas water heater is in the preheat cycle mode, the sound emitted by the gas water heater can be low, such as less than 46 decibels, thereby improving the user experience.

In order to further reduce the sound emitted by the gas hot water device, since the water pump 3 generates a certain vibration during operation, a shock pad (such as a rubber pad) may be disposed between the casing 8 and the water pump 3, thereby the water pump 3 and The sound emitted between the housings 8 is lowered. A shock absorbing member, such as a hose 7, may also be provided between the line connected to the water pump 3 and the water pump 3, thereby completely isolating the water pump 3 from the entire machine. The hose 7 can have a pressure resistance and a high temperature resistance effect, and can also absorb the vibration generated by the water pump 3, thereby greatly reducing the noise during the preheating cycle and improving the user experience.

The combustion device 2 comprises a distributor 6 having at least two chambers 61, at least one of which has a chamber 61 corresponding to the fire row of one or two or three burners 2. Referring to FIG. 5, in the present embodiment, the dispenser 6 has three chambers 61 and three solenoid valves 62. The three chambers 61 respectively correspond to a solenoid valve 62 capable of operating the chamber 61 of the distributor 6 in accordance with the needs of the combustion device 2, for example, the three solenoid valves 62 can make this The three chambers 61 are in operation or respectively at the same time. One of the three chambers 61 is a preheating chamber (generally the smallest chamber 61, which may also share two chambers 61), which corresponds to two fire rows. When the gas hot water heater is in the preheat cycle mode, the distributor 6 has only the preheating chamber in communication with the proportional valve. At this time, two fire rows corresponding to the preheating chamber are in an operating state, and the output power of each fire row is approximately 1 kilowatt, and the output power of the combustion device 2 is approximately 2 KW (kilowatt).

In the present embodiment, the preheating cycle mode includes: when the control device 4 controls the heating device 2 to heat the water in the heat exchanger 1 to a preset range, the control device 4 controls The combustion device 2 heats the water in the heat exchanger 1 in the first mode of operation and causes the water temperature of the water in the heat exchanger 1 to approach the preheating target temperature. In general, in order to enable the user to take out more desirable water when taking water, the warm-up target temperature may be lower than the water target temperature or the same as the water target temperature. For example, the water target temperature can At 46 degrees Celsius, the corresponding preheat target temperature can be 43 degrees Celsius.

That is, in the case of the preheating cycle mode, the combustion device 2 can increase the water temperature of the water in the heat exchanger 1 or the water temperature of the water in the circulation line to a preset range, such as 38-43 degrees Celsius, and then at the first In the working mode, the water in the heat exchanger 1 or the water in the circulation line gradually tends to preheat the target temperature. Due to the lower power of the combustion device in the first mode of operation, the water in the circulation line can be slightly heated and gradually heated to the preheating target temperature.

In some cases where the user's pipeline is long (the energy consumed by the pipeline is depleted) or the rapid temperature rise is required (the initial water temperature is much lower than the preheating target temperature), the combustion device 2 can exchange heat in the second mode of operation. The water temperature of the water in the vessel 1 or the water temperature of the water in the circulation line is increased to a preset range. For example, the warm-up target temperature may be 43 degrees Celsius, and the preset range may be 38 degrees Celsius to 42 degrees Celsius. When the water temperature of the water in the heat exchanger 1 or the water temperature of the water in the circulation line (water driven by the water pump) is 20 degrees Celsius, the combustion device 2 can be in the second operation mode, that is, the output power of the combustion device 2 is greater than 4 KW, the water temperature of the water in the heat exchanger 1 or the water temperature of the water in the circulation line is rapidly increased.

In some cases, the user's pipeline is short (the energy consumption generated by the pipeline is small) or the rapid temperature rise is not required (the initial water temperature is closer to the water temperature of the water in the heat exchanger 1 or the water temperature of the water in the circulation pipeline). Next, the combustion device 2 can raise the water temperature of the water in the heat exchanger 1 or the water temperature of the water in the circulation line (water driven by the water pump) to a preset range in the first operation mode. Thereby, the combustion device 2 can bring the water temperature of the water in the heat exchanger 1 or the water temperature of the water in the circulation line to a maximum value of the preset range without instantaneously exceeding the target temperature of the preheating cycle.

In a preferred embodiment, the control device 4 receives user usage rules, and the control device 4 controls the gas hot water device to perform a warm-up cycle mode based on the user usage rules. For example, based on the user usage rules, the control device 4 knows that the water consumption of the gas hot water device is low or the water frequency is low from 9:00 to 11:00 during the day. To save power, the control device 4 can prevent the gas water heater from entering. The preheating cycle mode, that is, the water pump 3 and the combustion device 2 of the gas water heater are in a stopped state. For another example, based on the user usage rule, the control device 4 obtains the peak of the water consumption of the gas hot water device at 22 o'clock in the evening or the water frequency is high. In order to improve the user experience, the control device 4 can make the gas hot water device at night 22 Enter the preheat cycle mode before the point (such as 21 o'clock in the evening). In this way, when the user needs water, the water that meets the user's requirements can be obtained immediately.

The embodiment of the present application discloses a gas hot water system including a heat exchanger 1 having a water inlet and a water outlet; a hot water pipeline 12 connected to the water outlet of the heat exchanger 1; a water line 9 connected to the water inlet; a hot water line 12, a return water line 9 and a heat exchanger 1 are connectable to form a circulation line; and a combustion device 2 for heating water in the heat exchanger The combustion device 2 has a first operational mode of a first output power range and a second operational mode of a second output power range; the first output power range is less than 4 kilowatts; communicating with the heat exchanger 1 a water pump 3; a control device 4 connected to the combustion device 2 and the water pump 3; the gas water heating system There is a preheat cycle mode, the control device 4 controlling the water pump 3 to drive water flow in the heat exchanger 1, and controlling the combustion device 2 to be in a first mode of operation.

The gas hot water system in the embodiment of the present application has a preheating cycle mode. When the gas hot water system is in the preheating cycle mode, the control device 4 in the gas hot water system can cause the water pump 3 to drive the water flow in the heat exchanger 1, thereby the water and the circulation line in the heat exchanger 1. The water in the circulation is circulating. And the control device 4 in the gas hot water system can also operate the combustion device 2 in the first mode of operation, i.e., operate the combustion device 2 at a lower output power (such as 1-3 kW). With the above structure, the gas water heater system can also make the water temperature of the water in the circulation line or the water temperature of the water in the heat exchanger 1 approach the preheating target temperature during the preheating cycle. The water pump 3 is continuously in operation, and the combustion device 2 can also be kept in operation. The water temperature of the water in the circulation line or the water in the heat exchanger 1 can also be maintained at the preheating target temperature for a long time, and the fluctuation of the water temperature of the water in the circulation line or the water in the heat exchanger 1 is also small. Since the sound of the gas hot water device is higher when the combustion device 2 is ignited and the water pump 3 is started, the gas water heater in the embodiment of the present application reduces the number of ignitions of the combustion device 2 and the number of starts of the water pump 3, and thus Correspondingly, the sound of the gas hot water system during the preheating cycle is reduced.

In the present embodiment, further, when the control device 4 controls the combustion device 2 to heat the water in the heat exchanger 1 to a predetermined range, the control device 4 controls the combustion device 2 The water in the heat exchanger 1 is heated in the first mode of operation and the water temperature of the water in the heat exchanger 1 is brought to a preheating target temperature. That is, in the case of the preheating cycle mode, the combustion device 2 can increase the water temperature of the water in the heat exchanger 1 or the water temperature of the water in the circulation line to a preset range in the first working mode or the second working mode. Then, in the first working mode, the water in the heat exchanger 1 or the water in the circulation line gradually tends to preheat the target temperature.

In the present embodiment, the gas hot water system may further include a water mode in which the control device 4 can control the combustion device 2 to be in the second mode of operation, that is, the output power of the combustion device 2 is higher. Large (e.g., greater than 4 kW) while at least one mixing valve 11 is in an open state, the user can obtain water from the user end through the open mixing valve 11. In this water mode, in order to bring the outlet water temperature of the user end to the water target temperature, the control device 4 controls the output power of the combustion device 2 so that the outlet water temperature of the heat exchanger 1 approaches the water target temperature. In general, the water target temperature is higher than the user set temperature. For example, when the user sets the temperature to 43 degrees Celsius, the water target temperature may be slightly higher in order to make the water temperature of the water mixed by the mixing valve 11 in accordance with the user set temperature, for example, the water target temperature may be 46 degrees Celsius. .

In this embodiment, after the gas hot water system is switched from the preheating mode to the water mode, the variable frequency pump increases the preset flow rate to the intermediate flow, and the control device 4 controls the output power of the combustion device 2. Heat exchange The outlet water temperature of the device 1 tends to the water target temperature; the variable frequency pump continues to increase the intermediate flow rate to the influent flow rate of the water pump 3, and the control device 4 controls the output power of the combustion device 2 to cause the exchange The outlet temperature of the heater 1 tends to the target temperature of water. In order to stabilize the outlet temperature of the heat exchanger 1 at the water target temperature, the output of the combustion device 2 needs to match the operating flow of the variable frequency pump. At the same time, the matching of the output power of the combustion device 2 with the operating flow of the variable frequency pump has a certain retardation. In order to minimize the fluctuation of the outlet water temperature of the heat exchanger 1, during the process of increasing the preset flow rate of the variable frequency pump to the operating flow rate of the water pump 3 in the water mode, one or more intermediate flow rates may be set, and the control device 4 controls the water pump 3 After increasing from the lower flow rate to an intermediate flow rate closest to and above its flow rate, the control device 4 increases the output power of the combustion device 2 such that the output power of the combustion device 2 matches the intermediate flow rate of the water pump 3 when the combustion After the output power of the device 2 is matched with the intermediate flow rate of the water pump 3, the flow rate of the water pump 3 can be further increased to the next intermediate flow rate or increased to the operating mode of the water usage mode, and the output power of the combustion device 2 can be further increased, so that the combustion device The output power of 2 matches the next intermediate flow of the pump 3 or the operating flow of the water mode.

In this embodiment, after the gas hot water system is switched from the water usage mode to the preheating cycle mode, the control device 4 controls the variable frequency pump to reduce the flow rate to the intermediate flow rate, and the control device 4 controls the The output power of the combustion device 2 causes the outlet water temperature of the heat exchanger to approach the preheating target temperature; the variable frequency pump continues to reduce the intermediate flow rate to the preset flow rate, and the control device 4 controls the combustion The output power of the device 2 causes the outlet water temperature of the heat exchanger to approach the preheat target temperature.

Of course, in other optional embodiments, for example, when the gas hot water system acquires a user having a large water intake possibility during the time period, the control device 4 of the gas hot water system can also cause the variable frequency pump to use water therein. The mode runs under running traffic. Of course, in other optional embodiments, for example, when the gas hot water system acquires the user having a small water intake possibility during the time period, the control device 4 of the gas hot water system can also stop the variable frequency pump. The combustion device 2 stops heating. Preferably, in order to detect the temperature of the water in the circulation line, a temperature detecting means may be provided at the water inlet and the water outlet of the heat exchanger 1 or other circulation lines. In order to detect the flow rate of water in the circulation line, a flow rate detecting device may be provided at the outlet of the water pump 3 or other circulation line.

2 shows a specific embodiment of the gas hot water system of the present application. Referring to FIG. 2, the gas hot water system includes a water mixing valve 11 having a hot water end and a cold water end. The hot water end of the mixing valve 11 is in communication with the hot water pipe 12, and the cold water end of the mixing valve 11 can communicate with the water source through the cold water pipe 13; the water inlet of the heat exchanger 1 is connected to the water source; a portion 10, the hot water pipe 12 and the cold water pipe 13 may be connected when the control portion 10 is opened; the cold water pipe 13, the control portion 10 forms the water return pipe 9; After the water pump 3 is started, the control unit 10 is opened to allow the circulation line to communicate. Single tube cruise in this embodiment is heat combustion The gas water heater is for the case where the user does not have the return water pipe 9 installed in the home. That is, the gas hot water system can cause the hot water line 12, the control unit 10, the cold water pipe 13, and the heat exchanger 1 to form a circulation line through the control unit 10, thereby realizing a warm-up cycle mode. This method solves the need for the hot water supply function without the return water pipe user. Preferably, the control portion 10 can be turned on based on the pressure signal supplied from the water pump 3. When the gas hot water system stops the water use mode and is ready to enter the warm-up cycle mode, the water pump 3 outputs a pressure signal to the control unit 10, thereby opening the control unit 10 so that the circulation line is connected.

In the present embodiment, the control unit 10 is a constant pressure switch device, and the constant pressure switch device includes: a valve body having a flow passage therein; the flow passage having an inlet and an outlet; and a seal capable of mutually attracting each other a blocking member and a smokable member; the blocking member having a blocking position separating the inlet from the outlet and a communicating position connecting the inlet and the outlet at a predetermined distance; When the pressure difference between the two sides of the inlet to the outlet direction is greater than the attraction between the blocking member and the smokable member, the blocking member can move to the communication position; the blocking member The blocking member is movable toward the blocking position when a pressure difference between the two sides of the inlet to the outlet direction is less than an attractive force between the blocking member and the smokable member.

With the above structure, the control device 4 controls the variable frequency pump to give the constant pressure switch device a continuous starting pressure (such as 0.04-0.1 MPA), and the blocking member is along the inlet under the continuous action of the starting pressure. The pressure difference between the two sides of the outlet direction is greater than the attraction between the blocking member and the smokable member, and the blocking member can continue to move toward the communication position, thereby reaching the communication position to open the constant pressure switch device. To turn on the loop. After the constant pressure switch device is opened (ie, the circuit is turned on), the control device 4 controls the variable frequency pump to drive the water in the heat exchanger 1 to operate in order to operate at a lower and more suitable power consumption. Set the flow to run. Since the sealing member needs to be under the constant starting pressure, the constant pressure switch device can be opened, so that errors such as false start due to fluctuations in the water pressure of the pipeline can be avoided.

In a preferred embodiment, the gas hot water system includes a plurality of mixing valves 11, and the two ends of the control portion 10 are respectively respectively connected to the hot water end of the mixing valve 11 farthest from the heat exchanger 1. The cold water ends are directly connected. Thus, when the return water line 9 is turned on, the water in the most hot water line 12 and the cold water pipe 13 can be circulated, and the route of the circulation line can be made longest. When any one of the mixing valves 11 is opened, the water temperature of each corresponding user end can also meet the requirements.

Referring to Figure 3, in another embodiment, a return water line 9 has been installed in the user's home, i.e., a return water line 9 is provided between the hot water end of the mixing valve 11 and the water inlet.

Referring to FIG. 1 again, the embodiment of the present application discloses a gas water heater including a heat exchanger 1 having a water inlet and a water outlet; and a combustion for heating the water in the heat exchanger 1 Device 2; said combustion The device 2 has a first operational mode of a first output power range and a second operational mode of a second output power range; the first output power range is less than 4 kilowatts; disposed downstream of the combustion device 2 in the direction of combustion smoke a stepless speed control fan 5; a water pump 3 in communication with the heat exchanger 1; a control device 4 connected to the combustion device 2, the water pump 3 and the stepless speed control fan 5; a thermal cycle mode, the preheating cycle mode comprising: the control device 4 controls the water pump 3 to drive water flow in the heat exchanger 1, controls the combustion device 2 to be in a first mode of operation, and controls the stepless The speed of the speed control fan 5 matches the first mode of operation of the combustion device 2.

As described above, when the control device 4 can control the heating device 2 to heat the water temperature of the water in the heat exchanger 1 to a preset range, the control device 4 controls the combustion device 2 at the The water in the heat exchanger 1 is heated in an operating mode, and the water temperature of the water in the heat exchanger 1 is brought to a preheating target temperature.

When the combustion device 2 is in the first working mode, that is, when the output power of the combustion device 2 is low, the control device 4 can control the rotation speed of the stepless speed control fan 5, that is, control the stepless speed control fan 5 The output of the combustion device 2 is operated at a matching speed, so as to satisfy the air volume condition required by the combustion device 2, the sound emitted by the stepless speed control fan 5 is minimized to further reduce the gas water heater in the preheating cycle. The sound that is emitted in mode. The specific operation process can be referred to as a low noise gas fast water heater, patent No. ZL201210051343.1, and the control device 4 controls the combustion device to heat the burner group in a suitable low-decibel combustion load region. The water temperature of the water in the heat exchanger reaches a preset range, and the rotation speed of the stepless speed control fan 5 is controlled to match the combustion of the suitable burner group.

Specifically, the stepless speed regulating fan 5 in the present application may be located above the gas water heater, and the stepless speed regulating fan 5 is an upper drawing type fan. Since the combustion flue gas expands and expands itself, under the same combustion load, the fan speed of the upper exhaust technology is lower, and the generated combustion noise is correspondingly lower, so that the user experience is better.

In a preferred embodiment, the combustion device 2 comprises at least two groups of burners that can be controlled to burn separately or simultaneously in a low-decibel combustion load region, the control device 4 controlling the combustion device 2 to a suitable low The burner group of the decibel combustion load region heats the water temperature of the water in the heat exchanger 1 to a preset range, and controls the rotation speed of the stepless speed control fan 5 to match the combustion of the suitable burner group. In the case where the burner groups are burned in different combinations, the combustion load region of each combination is different according to the number of burner groups, and the noise regions corresponding to the combustion load regions of each combination are substantially the same. The combustion load area corresponding to the low-noise area of different combination forms a continuous low-noise combustion load area of the gas rapid water heater, so that the noise of the gas fast water heater operating in the low-noise combustion load area is always kept in a low noise range, The user is no longer noisy because of the noise of the gas fast water heater when using water in the kitchen, and has achieved unexpected results. Simultaneously, The rotational speed of the stepless speed control fan 5 is controlled to match the amount of air required for combustion of the suitable burner group.

The embodiment of the present application also discloses a hot water device including a heat exchanger having a water inlet and a water outlet; a heating device for heating water in the heat exchanger; a water pump 3 connected to the heat exchanger; a control device 4 connected to the heating device and the water pump 3; the hot water device having a preheat cycle mode, the preheat cycle mode comprising: the control device 4 controlling the The water pump 3 drives the flow of water in the heat exchanger 1 to control the heating device to be in a first mode of operation, the heating power of the first mode of operation being less than 4 kW.

In the present embodiment, the hot water device is an electric water heater, and the heating device is an electric heating device. Of course, in other optional embodiments, the hot water device may also be other hot water devices with heating functions having the same or similar effects.

The various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the various embodiments can be referred to each other.

The above embodiments are only for explaining the technical concept and the features of the present application, and the purpose of the present invention is to enable those skilled in the art to understand the contents of the present application and to implement them, and the scope of the present application is not limited thereto. Equivalent changes or modifications made in accordance with the spirit of the present application are intended to be included within the scope of the present application.

Claims

A gas hot water device, characterized in that the gas hot water device comprises:

a heat exchanger having a water inlet and a water outlet;

a combustion apparatus for heating water in the heat exchanger, the combustion apparatus having a first operational mode of a first output power range, and a second operational mode of a second output power range;

The first output power range is less than 4 kilowatts;

a water pump in communication with the heat exchanger;

a control device coupled to the combustion device and the water pump;

The gas hot water device has a preheat cycle mode, and the preheat cycle mode includes:

The control device controls the water pump to drive water flow in the heat exchanger to control the combustion device to be in a first mode of operation.
The gas water heater according to claim 1, wherein said gas water heater comprises a casing, said water pump being located in said casing, and said water pump having a casing diameter of less than 50 mm.
The gas water heater according to claim 1, wherein said water pump flow rate is ≤ 5 L/min.
A gas water heater according to claim 1, wherein said water pump is a variable frequency pump.
A gas water heater according to claim 4, wherein said control means controls said water pump to drive water in said heat exchanger when said gas hot water heater is in said preheat cycle mode The preset flow runs.
The gas water heater according to claim 5, wherein said preset flow rate ranges from 2 to 5 L/min.
The gas water heater according to claim 1, wherein when the gas water heater is in the warm-up cycle mode, the sound emitted by the gas-water heater is less than 46 decibels.
The gas water heater according to claim 2, wherein a cushion is provided between the casing and the water pump.
The gas-fired water heater according to claim 1, wherein a damper member is provided between the pipe connected to the water pump and the water pump.
The gas water heater according to claim 9, wherein the damper member is a hose.
The gas water heater according to claim 1, wherein said first output power ranges from 1-3 Kw.
A gas water heater according to claim 1, wherein said combustion means comprises a dispenser, The dispenser has at least two chambers, at least one of which has a chamber corresponding to a fire row of one or two or three burners.
The gas water heater according to claim 1, wherein the gas water heater further comprises a hood, and the hood is made of stainless steel.
The gas water heating device according to claim 1, wherein the preheating cycle mode comprises: the control device controls the heating device to heat the water in the heat exchanger to a predetermined range The control device controls the combustion device to heat water in the heat exchanger in the first mode of operation and to bring the water temperature of the water in the heat exchanger to a preheating target temperature.
A gas-fired water heater according to claim 14, wherein said control means controls said combustion means to heat the water temperature of the water in said heat exchanger in said first mode of operation to a predetermined range.
A gas-fired water heater according to claim 14, wherein said control means controls said combustion means to heat the water temperature in said heat exchanger to a predetermined range in said second mode of operation.
The gas water heater according to claim 14, wherein a maximum value of said preset range is lower than said warm-up target temperature.
The gas-fired water heater according to claim 14, wherein the warm-up target temperature is equal to or smaller than a water target temperature.
The gas water heater according to claim 1, wherein said control means receives a user usage rule, and said control means controls said gas water heater to perform a warm-up cycle mode based on said user usage rule.
A gas hot water system, characterized in that the gas hot water system comprises:

a heat exchanger having a water inlet and a water outlet;

The water outlet is connected to a hot water pipe at the water end;

The water inlet is connected to a water return pipe at the water end;

The hot water pipeline, the return water pipeline and the heat exchanger can be connected to form a circulation pipeline;

a combustion apparatus for heating water in the heat exchanger, the combustion apparatus having a first operational mode of a first output power range, and a second operational mode of a second output power range; the first output Power less than 4 kW;

a water pump in communication with the heat exchanger;

a control device coupled to the combustion device and the water pump;

The gas hot water system has a preheat cycle mode, and the preheat cycle mode includes:

The control device controls the water pump to drive water flow in the heat exchanger to control the combustion device to be in a first mode of operation.
A gas hot water system according to claim 20, wherein said control means controls said control means when said control means controls said heating means to heat water in said heat exchanger to a predetermined range The combustion device heats the water in the heat exchanger in the first mode of operation and causes the water temperature of the water in the heat exchanger to tend to preheat the target temperature.
A gas hot water system according to claim 21, wherein said control means controls said combustion means to continue in said first mode of operation after said water temperature in said circulation line reaches a preheating target temperature It is operated to maintain the temperature of the water in the circulation line.
The gas hot water system according to claim 21, wherein said control means controls said combustion means to heat the water temperature of the water in said heat exchanger to a preset range in the second operation mode.
A gas hot water system according to claim 21, wherein said control means controls said combustion means to heat the water temperature of the water in said heat exchanger in a first operating mode to a predetermined range.
The gas hot water system according to claim 20, wherein said water pump is a variable frequency pump.
A gas hot water system according to claim 25, wherein said gas hot water system includes a water mode, said water mode comprising: said control means controlling said output of said combustion means to cause said heat exchanger The effluent temperature tends to the water target temperature.
The gas hot water system according to claim 26, wherein after the gas hot water system is switched from the preheating cycle mode to the water usage mode, the variable frequency pump increases a preset flow rate to an intermediate flow rate, The control device controls the output power of the combustion device such that the outlet water temperature of the heat exchanger tends to the water target temperature; the variable frequency pump continues to increase the intermediate flow rate to the water inlet flow of the water pump, the control device controls The output power of the combustion device causes the outlet water temperature of the heat exchanger to converge toward the water target temperature.
The gas hot water system according to claim 26, wherein said control means controls said variable frequency pump to reduce flow rate after said gas hot water system is switched from said water use mode to said preheat cycle mode An intermediate flow, the control device controls an output power of the combustion device such that an outlet water temperature of the heat exchanger approaches the preheating target temperature; and the variable frequency pump continues to decrease the intermediate flow to a preset flow rate, The control device controls the output power of the combustion device such that the outlet water temperature of the heat exchanger tends to preheat the target temperature.
The gas hot water system according to claim 25, wherein said gas hot water system comprises a water mixing valve, said mixing valve having a hot water end and a cold water end, said hot water end of said mixing valve The hot water pipe is connected, and the cold water end of the mixing valve can communicate with the water source through the cold water pipe;

The water inlet of the heat exchanger is connected to the water source;

A control unit is further included, and the hot water pipe and the cold water pipe can be turned on when the control portion is opened;

The cold water pipe and the control portion form the return water pipeline;

When the water pump is started, the control portion is opened to allow the circulation line to communicate.
The gas water heating system according to claim 29, wherein said water pump is capable of providing a pressure signal to said control portion for opening thereof when said water pump is in operation.
A gas hot water system according to claim 30, wherein said control portion is a constant pressure switch device, said constant pressure switch device comprising: a valve body having a flow passage therein; said flow passage having an inlet And export;

a blocking member and a smokable member capable of mutually attracting each other;

The blocking member has a blocking position separating the inlet from the outlet and a communication position connecting the inlet and the outlet at a predetermined distance;

When the pressure difference between the two sides of the blocking member in the outlet direction is greater than the attraction between the blocking member and the smokable member, the blocking member can be connected to the communication position mobile;

When the pressure difference between the two sides of the blocking member in the outlet direction is smaller than the attraction between the blocking member and the smokable member, the blocking member can block the sealing member Position moves.
A gas hot water system according to claim 31, wherein said gas hot water system includes a water mode, said water mode comprising: said control means controlling said output of said combustion means such that said heat exchanger The outlet water temperature tends to the water target temperature, and when the water mode is switched to the preheating cycle mode, the control device controls the variable frequency pump to apply pressure to the constant pressure switch device to open the constant pressure switch device. After the constant pressure switch device is turned on, the control device controls the variable frequency pump to drive water in the heat exchanger to operate at a preset flow rate.
The gas hot water system according to claim 32, wherein the constant pressure switch device has a starting pressure of 0.04 - 0.1 MPa.
The gas hot water system according to claim 29, wherein the gas hot water system comprises a plurality of mixing valves, and both ends of the control portion are respectively connected to a mixing valve farthest from the heat exchanger The hot water end and the cold water end are directly connected.
A gas hot water system according to claim 20, wherein said gas hot water system comprises

a mixing valve, the mixing valve has a hot water end and a cold water end, the hot water end of the mixing valve is in communication with the hot water pipe, and the cold water end of the mixing valve is connected to the water source through the cold water pipe;

The return water line is disposed between the hot water end of the mixing valve and the water inlet.
The gas hot water system according to claim 20, wherein said gas hot water system comprises temperature detecting means and flow detecting means provided on said circulation line.
A gas water heater, characterized in that the gas water heater comprises:

a heat exchanger having a water inlet and a water outlet;

a combustion apparatus for heating water in the heat exchanger; the combustion apparatus having a first operational mode of a first output power range and a second operational mode of a second output power range;

The first output power range is less than 4 kilowatts;

a stepless speed regulating fan disposed downstream of the combustion device along a direction of combustion smoke;

a water pump in communication with the heat exchanger;

a control device coupled to the combustion device, the water pump, and the stepless speed control fan;

The gas water heater has a preheat cycle mode, and the preheat cycle mode includes:

The control device controls the water pump to drive water flow in the heat exchanger, controls the combustion device to be in a first working mode, and controls the rotation speed of the stepless speed regulating fan to match the first working mode.
A gas water heater according to claim 37, wherein said control means controls said combustion means when said control means controls said combustion means to heat water of said water in said heat exchanger to a predetermined range The water in the heat exchanger is heated in the first mode of operation and the water temperature of the water in the heat exchanger is brought to a preheating target temperature.
A gas water heater according to claim 38, wherein said combustion means comprises at least two sets of burners controllable separately or simultaneously in a low-decibel combustion load zone, said control means controlling said combustion means to A burner group of a suitable low-decibel combustion load zone heats the water temperature of the water in the heat exchanger to a predetermined range and controls the rotational speed of the stepless speed-regulated fan to match the combustion of the suitable burner bank.
The gas water heater according to claim 37, wherein the water pump is a variable frequency pump, and the control device controls the variable frequency pump to drive water in the heat exchanger to flow at a preset flow rate, and the combustion device is controlled The temperature of the water that heats the water in the heat exchanger in the first mode of operation tends to preheat the target temperature.
A hot water device characterized in that the hot water device comprises:

a heat exchanger having a water inlet and a water outlet;

a heating device for heating water in the heat exchanger;

a water pump in communication with the heat exchanger;

a control device coupled to the heating device and the water pump;

The hot water device has a preheat cycle mode, and the preheat cycle mode includes:

The control device controls the water pump to drive water flow in the heat exchanger, and controls the heating device to be in a first working mode, and the heating power of the first working mode is less than 4 Kw.
A hot water apparatus according to claim 41, wherein said heating means is an electric heating means.