CN117928096A - Control method and device of air source heat pump water heater - Google Patents

Abstract

The invention discloses a control method and a device of an air source heat pump water heater, wherein the method comprises the following steps: acquiring an enabling state of a temperature sensor; determining an equivalent water temperature of the balance water tank and an equivalent water temperature detection state based on the enabling state of the temperature sensor; determining the equivalent actual outlet water temperature of the balance water tank based on the enabling state of the temperature sensor, the equivalent water temperature of the balance water tank and the equivalent water temperature detection state; and acquiring the set temperature of the tail end heat supply equipment, and controlling the start-stop of the outdoor unit based on the equivalent actual outlet water temperature and the set temperature of the balance water tank. According to the invention, when the equivalent water temperature detection state of the balance water tank fails, the equivalent actual water outlet temperature of the balance water tank can still be calculated, so that the equivalent actual water outlet temperature of the balance water tank can be used as a key parameter of the heat supply requirement of constant terminal equipment, the system can still work normally when a key temperature sensor fails, the use requirement of a user is ensured, and the user experience is improved.

Description

Control method and device of air source heat pump water heater

Technical Field

The invention relates to the technical field of air conditioners, in particular to a control method and a device of an air source heat pump water heater.

Background

The air-source heat pump water heater generally comprises an air conditioner, a water module, a floor heating and a heat exchange plate, and with the increasing popularity of the air-source heat pump water heater, more and more users use the air-source heat pump water heater as main equipment for home heating. In order to ensure that the water outlet temperature of the heat pump water heater is stable, a balance water tank is usually arranged between a hot water outlet of the water module and the heat supply equipment, and the actual water outlet temperature of the balance water tank can better reflect the actual water inlet temperature condition of the tail end heat supply equipment, so that the heat supply requirements of the tail end heat supply equipment can be distributed according to the actual water outlet temperature condition of the balance water tank. However, in the actual use process, when a key temperature sensor in the air-source heat pump water heater fails, the system is easy to work abnormally, for example, the actual water outlet temperature of the balance water tank cannot be detected when the sensor for detecting the water temperature in the balance water tank fails, so that the heat supply requirement of constant-quantity tail-end heat supply equipment cannot be distributed, the emergency use requirement of a user cannot be met, and the user experience is reduced.

Disclosure of Invention

In order to solve the problems, the invention provides the control method and the control device for the air-source heat pump water heater, which can take the equivalent actual outlet water temperature of the balance water tank as the key parameter of the heat supply requirement of constant end equipment, so that the system can still work normally when the key temperature sensor fails, the use requirement of a user is ensured, and the user experience is improved.

According to an embodiment of the present invention, in one aspect, there is provided a control method of an air-source heat pump water heater, the air-source heat pump water heater including an outdoor unit, a plurality of terminal heat supply devices, and a balance water tank, the balance water tank being disposed between the outdoor unit and the terminal heat supply devices, a temperature sensor being disposed in the balance water tank, the control method of the air-source heat pump water heater including:

Acquiring an enabling state of the temperature sensor; wherein the enabling state includes an enabled state and an disabled state;

Determining an equivalent water temperature and an equivalent water temperature detection state of the balance water tank based on the enabling state of the temperature sensor; wherein the equivalent water temperature detection state comprises a fault state and a normal state;

determining the equivalent actual outlet water temperature of the balance water tank based on the enabling state of the temperature sensor, the equivalent water temperature of the balance water tank and the equivalent water temperature detection state;

And acquiring the set temperature of the tail end heat supply equipment, and controlling the start-stop of the outdoor unit based on the equivalent actual outlet water temperature of the balance water tank and the set temperature.

By adopting the technical scheme, the temperature sensor is arranged in the balance water tank, the equivalent water temperature and the equivalent water temperature detection state of the balance water tank are determined according to the enabling state of the temperature sensor, and the equivalent actual water outlet temperature of the balance water tank is determined according to the enabling state of the temperature sensor, the equivalent water temperature and the equivalent water temperature detection state of the balance water tank.

Preferably, a first temperature sensor is disposed on the upper portion of the balancing water tank, a second temperature sensor is disposed on the lower portion of the balancing water tank, and the step of determining the equivalent water temperature and the equivalent water temperature detection state of the balancing water tank based on the enabling state of the temperature sensor includes:

When the enabling state of the first temperature sensor is the enabling state and the enabling state of the second temperature sensor is the non-enabling state, taking the first water temperature detected by the first temperature sensor as the equivalent water temperature of the balance water tank, and taking the current state of the first temperature sensor as the equivalent water temperature detection state; wherein the current state includes a fault state and a normal state;

When the enabling state of the first temperature sensor is the non-enabling state and the enabling state of the second temperature sensor is the enabling state, taking the second water temperature detected by the second temperature sensor as the equivalent water temperature of the balance water tank, and taking the current state of the second temperature sensor as the current state of the water temperature detection sensor;

when the enabling states of the first temperature sensor and the second temperature sensor are the enabling states, the current states of the first temperature sensor and the second temperature sensor are obtained, and the equivalent water temperature detection state of the balance water tank are determined based on the current states of the first temperature sensor and the second temperature sensor.

By adopting the technical scheme, the equivalent temperature of the balance water tank is determined according to the enabling state of the temperature sensor, so that the temperature sensor is flexibly configured in the balance water tank, the equivalent temperature of the balance water tank is rapidly and accurately detected, and the convenience and the flexibility of the equivalent temperature detection of the balance water tank are improved.

Preferably, the air-source heat pump water heater further includes a water module, the water module is disposed between the outdoor unit and the balance water tank, and the step of determining the equivalent water temperature and the equivalent water temperature detection state of the balance water tank based on the current states of the first temperature sensor and the second temperature sensor includes:

when the current states of the first temperature sensor and the second temperature sensor are fault states, the first water temperature detected by the first temperature sensor is used as the equivalent water temperature of the balance water tank, and the equivalent water temperature detection state is determined to be the fault state;

When the current state of the first temperature sensor is a normal state and the current state of the second temperature sensor is a fault state, acquiring the current state of a backwater water temperature sensor of the water module, if the current state of the backwater water temperature sensor is a fault state, taking the first water temperature as the equivalent water temperature of the balance water tank, determining that the equivalent water temperature detection state is a normal state, and if the current state of the backwater water temperature sensor is a normal state, taking the average value of the backwater water temperatures detected by the first water temperature and the backwater water temperature sensor as the equivalent water temperature of the balance water tank, and determining that the equivalent water temperature detection state is a normal state;

When the current state of the first temperature sensor is a fault state and the current state of the second temperature sensor is a normal state, acquiring the current state of a backwater water temperature sensor of the water module, if the current state of the backwater water temperature sensor is a fault state, taking the second water temperature as the equivalent water temperature of the balance water tank, determining that the equivalent water temperature detection state is a normal state, and if the current state of the backwater water temperature sensor is a normal state, taking the average value of the second water temperature and the backwater water temperature as the equivalent water temperature of the balance water tank, and determining that the equivalent water temperature detection state is a normal state;

When the current states of the first temperature sensor and the second temperature sensor are both normal states, taking the average value of the first water temperature and the second water temperature as the equivalent water temperature of the balance water tank, and determining that the equivalent water temperature detection state is the normal state.

By adopting the technical scheme, whether the first temperature sensor and the second temperature sensor are in a fault state is judged, and the temperature detection value which is most in line with the balance water tank is selected as the equivalent water temperature of the balance water tank when the temperature sensor breaks down, and the equivalent temperature of the balance water tank can still be estimated when the key temperature sensor of the balance water tank breaks down, so that the unit can still work normally, the emergency use requirement of a user is furthest ensured, and the trouble of use of the user caused by untimely maintenance of the temperature sensor is reduced.

Preferably, the step of determining the equivalent actual outlet water temperature of the balance water tank based on the enabling state of the temperature sensor, the equivalent water temperature of the balance water tank, and the equivalent water temperature detection state includes:

When the enabling states of the first temperature sensor and the second temperature sensor are not enabled, taking the water temperature of the water detected by the water temperature sensor of the water module as the equivalent actual water temperature;

When the enabling state of the first temperature sensor or the second temperature sensor is the enabling state, judging whether to enter a winterizing mode, if so, judging whether the equivalent water temperature detection state of the balance water tank is a fault state;

When the equivalent water temperature detection state of the balance water tank is a fault state and the current state of the backwater water temperature sensor is a fault state, taking the water temperature of the water detected by the water outlet water temperature sensor of the water module as the equivalent actual water outlet temperature;

When the equivalent water temperature detection state of the balance water tank is a fault state and the current state of the backwater water temperature sensor is a normal state, using the backwater water temperature detected by the backwater water temperature sensor of the water module as the equivalent actual water outlet temperature;

when the equivalent water temperature detection state of the balance water tank is a normal state, the equivalent water temperature of the balance water tank is used as the equivalent actual water outlet temperature.

Through adopting above-mentioned technical scheme, confirm the equivalent actual outlet water temperature of balanced water tank according to the equivalent temperature detection state of balanced water tank and return water temperature sensor's current state to the equivalent actual outlet water temperature of the estimated balanced water tank that detects based on the temperature sensor of normal detection state has promoted the detection accuracy of the equivalent actual outlet water temperature of balanced water tank, thereby can promote the reliability of the heat supply demand distribution of terminal heating equipment.

Preferably, the control method of the air-source heat pump water heater further comprises:

When the winterized mode is not entered, if the equivalent water temperature detection state of the balance water tank is a fault state, taking the backwater water temperature detected by a backwater water temperature sensor of the water module as the equivalent actual water outlet temperature;

and if the equivalent water temperature detection state of the balance water tank is a normal state, taking the equivalent water temperature of the balance water tank as the equivalent actual outlet water temperature.

Through adopting above-mentioned technical scheme, terminal heating equipment is warm including ground, ground warm with be provided with ground warm water pump, control valve and ground warm water temperature sensor of intaking on the inlet channel between the balanced water tank, the control method of air energy heat pump water heater still includes:

When only the floor heating is controlled to be started and the enabling state of the floor heating water inlet temperature sensor is in an enabling state, starting the floor heating water pump to acquire the floor heating water inlet temperature detected by the floor heating water inlet temperature sensor;

switching the operation mode of the control valve based on the floor heating water inlet temperature and the floor heating set temperature; the operation modes of the control valve comprise a water mixing mode and a heating mode.

Preferably, when the floor heating mode is started, the operation mode of the control valve is switched according to the floor heating water inlet temperature and the floor heating set temperature so as to adjust the water temperature entering the floor heating, ensure that the floor heating water temperature meets the heat supply requirement of a user, and promote user experience.

Through adopting above-mentioned technical scheme, ground warms up with still be connected with the return water pipeline between the balanced water tank, based on ground warms up the step of the running mode of water temperature and ground warms up the settlement temperature switch control valve, include:

when the floor heating water inlet temperature is higher than a first preset temperature, controlling the control valve to switch to the water mixing mode so that low-temperature water in the water return pipeline enters the water inlet pipeline; the first preset temperature is the sum of the floor heating set temperature and the floor heating startup return difference temperature;

when the ground heating water inlet temperature is greater than or equal to a second preset temperature and less than or equal to the first preset temperature, controlling the control valve to be switched between the water mixing mode and the heating mode in a periodic area; the second preset temperature is the sum of the floor heating set temperature and the floor heating shutdown return difference temperature;

when the temperature of the ground heating inflow water is smaller than the second preset temperature, the control valve is controlled to be switched to the heating mode, so that hot water in the inflow water pipeline enters the ground heating pipeline.

Preferably, the control valve is switched according to the relation between the ground heating water inlet temperature and the ground heating set temperature so as to increase or decrease the water inlet temperature entering the ground heating, so that the ground heating water inlet temperature is kept near the ground heating set temperature, thereby meeting the ground heating heat supply requirement of a user and improving the comfort of the user.

Preferably, the terminal heat supply equipment comprises a floor heater, an indoor unit and heat exchange plates; the step of controlling the outdoor unit to start and stop based on the equivalent actual outlet water temperature of the balance water tank and the set temperature comprises the following steps:

When the equivalent actual water outlet temperature of the balance water tank is smaller than the set temperature, controlling the outdoor unit and the water module to start up and run so as to increase the equivalent actual water outlet temperature of the balance water tank;

When the equivalent actual water outlet temperature of the balance water tank is greater than the set temperature, the outdoor unit and the water module are controlled to stop running so as to reduce the equivalent actual water outlet temperature of the balance water tank.

By adopting the technical scheme, the outdoor unit and the water module are controlled to be opened and closed according to the magnitude relation between the equivalent actual water outlet temperature of the balance water tank and the set temperature of the tail end heat supply equipment, so that the water temperature heat exchange speed of the unit is controlled according to the heat supply requirement of the tail end heat supply equipment, and the reliability of heat supply control of the unit is improved.

According to an embodiment of the present invention, there is provided a control apparatus for an air-source heat pump water heater including an outdoor unit, a plurality of terminal heat supply devices, and a balance water tank disposed between the outdoor unit and the terminal heat supply devices, a temperature sensor being disposed in the balance water tank, the control apparatus comprising:

The acquisition module is used for acquiring the enabling state of the temperature sensor; wherein the enabling state includes an enabled state and an disabled state;

The first determining module is used for determining the equivalent water temperature and the equivalent water temperature detection state of the balance water tank based on the enabling state of the temperature sensor; wherein the equivalent water temperature detection state comprises a fault state and a normal state;

The second determining module is used for determining the equivalent actual outlet water temperature of the balance water tank based on the enabling state of the temperature sensor, the equivalent water temperature of the balance water tank and the equivalent water temperature detection state;

and the control module is used for acquiring the set temperature of the tail end heat supply equipment, and controlling the outdoor unit to start and stop based on the equivalent actual outlet water temperature of the balance water tank and the set temperature.

According to an embodiment of the present invention, there is provided an air-source heat pump water heater including: the outdoor unit, the water module, a plurality of terminal heat supply equipment, the balance water tank and the controller, wherein the balance water tank is arranged between the outdoor unit and the terminal heat supply equipment, the water module is arranged between the outdoor unit and the balance water tank, and a temperature sensor is arranged in the balance water tank;

The controller comprises a computer readable storage medium storing a computer program and a processor, the computer program implementing the method according to any of the first aspects when read and run by the processor.

The invention has the following beneficial effects: through setting up temperature sensor in the balanced water tank, the equivalent temperature and the equivalent temperature detection state of balanced water tank are confirmed according to temperature sensor's enable state, the equivalent temperature of balanced water tank and the equivalent actual water temperature of balanced water tank are confirmed according to temperature sensor's enable state, the equivalent temperature detection state of balanced water tank, when the equivalent temperature detection state of balanced water tank breaks down, still can calculate the equivalent actual water temperature of balanced water tank, and then can regard the equivalent actual water temperature of balanced water tank as the key parameter of constant terminal equipment heat supply demand, make the system still can normally work when key temperature sensor breaks down, user's user demand has been guaranteed, user experience has been promoted.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.

The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the ambit of the technical disclosure.

FIG. 1 is a schematic diagram of an air source heat pump water heater according to the present invention;

FIG. 2 is a flow chart of a control method of an air source heat pump water heater provided by the invention;

FIG. 3 is a schematic diagram of water circulation in a floor heating water mixing mode provided by the invention;

FIG. 4 is a schematic diagram of water circulation in a floor heating mode according to the present invention;

fig. 5 is a schematic structural diagram of a control device of an air source heat pump water heater provided by the invention.

Detailed Description

Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

The embodiment provides an air-source heat pump water heater, referring to a schematic structural diagram of the air-source heat pump water heater shown in fig. 1, the air-source heat pump water heater includes: the outdoor unit 11, the water module 12, a plurality of terminal heat supply devices, the balance water tank 13 and a controller (not shown in the figure), the balance water tank 13 is arranged between the outdoor unit 11 and the terminal heat supply devices, the water module 12 is arranged between the outdoor unit 11 and the balance water tank 13, and a temperature sensor is arranged in the balance water tank 13.

The water module 12 is used for exchanging heat between water in the unit pipeline and refrigerant entering the water module 12 from the outdoor unit 11 to raise water temperature, and the heated water enters the water outlet pipeline through the water outlet main valve 121 of the water module 12, and then enters each terminal heat supply device through the balance water tank 13.

As shown in fig. 1, the dark gray pipeline in fig. 1 is the water outlet pipeline of the water module 12 (i.e. the water inlet pipeline of each terminal heat supply device), the light gray pipeline in fig. 1 is the water return pipeline of the water module, i.e. the water returned after heat dissipation in each terminal heat supply device, and the water in the water return pipeline enters the water module to exchange heat with the refrigerant after passing through the water return total valve 122 of the water module 12, so as to absorb the heat of the refrigerant.

As shown in fig. 1, a circulating water pump P1 is provided in the water module 12 to circulate water in the pipe sufficiently. The water outlet pipe of the water module 12 is also provided with a drain valve 123, and the water return pipe is provided with a water supplementing valve 124. Taking two temperature sensors as an example, the balance water tank 13 is provided with a first temperature sensor BT1 at the upper portion and a second temperature sensor BT2 at the lower portion.

The terminal heat supply equipment comprises an indoor unit 14, a heat exchange plate 15 and a floor heater 16, the air energy heat pump water heater provided by the embodiment can further comprise a hot water tank 17, water in the hot water tank 17 can be heated by using a solar cell panel, and the water can enter a water module 12 to exchange heat with a refrigerant, so that domestic water of a user is stored.

As shown in fig. 1, an external circulation pump P2 is provided on a connection pipe of the hot water tank 17, and a floor heating water pump P3, a control valve MV2 and a floor heating water inlet temperature sensor FLH are provided on a water inlet pipe between the floor heating and balance water tanks.

The present embodiment provides a control method of an air-source heat pump water heater, which can be applied to the air-source heat pump water heater provided in the foregoing embodiment, referring to a flowchart of a control method of an air-source heat pump water heater shown in fig. 2, the method mainly includes the following steps S202 to S208:

Step S202: acquiring an enabling state of a temperature sensor;

the enabling state of the temperature sensor comprises an enabling state and a non-enabling state, namely whether the temperature detection value of the temperature sensor is used in the control process, and the temperature sensor can detect the water temperature in the balance water tank in the enabling state and the non-enabling state.

Step S204: determining an equivalent water temperature of the balance water tank and an equivalent water temperature detection state based on the enabling state of the temperature sensor;

The equivalent water temperature detection state comprises a fault state and a normal state; the equivalent water temperature detection state is related to the current state of the temperature sensor in the balance tank. The number of the temperature sensors in the balance water tank may be one or more, and the temperature sensor in the balance water tank is determined to be in a fault state when the temperature sensor has an open circuit or a short circuit problem.

When the temperature sensor which is not in a fault state (namely in a normal state) exists in the balance water tank, the equivalent water temperature of the balance water tank can be detected normally, the equivalent water temperature detection state of the balance water tank is determined to be in the normal state, and the equivalent water temperature of the balance water tank is determined according to the water temperature detected by the temperature sensor in the normal state.

Step S206: determining the equivalent actual outlet water temperature of the balance water tank based on the enabling state of the temperature sensor, the equivalent water temperature of the balance water tank and the equivalent water temperature detection state;

When the enabling state of the temperature sensor is the starting state, the equivalent actual outlet water temperature of the balance water tank is determined according to the equivalent water temperature of the balance water tank and the equivalent water temperature detection state, and the equivalent actual outlet water temperature can reflect the inlet water temperature of each tail end heat supply device, so that the heat supply requirement of the tail end heat supply device can be constant.

When the enabling state of the temperature sensor is the non-enabling state, the equivalent actual outlet water temperature of the balance water tank needs to be determined according to the water temperatures detected by other temperature sensors, such as the inlet water temperature or the return water temperature of the water module.

Step S208: and acquiring the set temperature of the tail end heat supply equipment, and performing start-stop control on the tail end heat supply equipment based on the equivalent actual outlet water temperature and the set temperature of the balance water tank.

The above-mentioned terminal heat supply equipment may include indoor unit of air conditioner, heat exchanger (i.e. radiator) and floor heating, and the above-mentioned set temperature may be the water temperature required by each terminal heat supply equipment for implementing indoor heat supply, and the set temperatures of each terminal heat supply equipment may be identical or different. Because the equivalent actual water outlet temperature of the balance water tank is approximately the actual water temperature entering the indoor unit and the heat exchange plates, the relationship between the equivalent actual water outlet temperature and the set temperatures of the indoor unit and the heat exchange plates is judged, when the equivalent actual water outlet temperature is lower than the set temperature, namely the water temperature entering the tail end heat supply equipment is lower, the heat supply requirement is not met, the equivalent actual water outlet temperature of the balance water tank needs to be improved, the starting operation of the outdoor unit is controlled, and the equivalent actual water outlet temperature of the balance water tank is improved at the heat exchange speed of the water temperature in the system is increased.

In a specific embodiment, the terminal heating device includes a floor heater, an indoor unit and a heat exchanger plate; when the equivalent actual water outlet temperature of the balance water tank is smaller than the set temperature, the outdoor unit and the water module are controlled to start up and run so as to increase the equivalent actual water outlet temperature of the balance water tank; when the equivalent actual water outlet temperature of the balance water tank is greater than the set temperature, the outdoor unit and the water module are controlled to stop running so as to reduce the equivalent actual water outlet temperature of the balance water tank.

The outdoor unit and the water module are controlled to be opened and closed according to the magnitude relation between the equivalent actual outlet water temperature of the balance water tank and the set temperature of the tail end heat supply equipment, so that the water temperature heat exchange speed of the unit is controlled according to the heat supply requirement of the tail end heat supply equipment, and the reliability of heat supply control of the unit is improved.

According to the control method of the air-source heat pump water heater, the temperature sensor is arranged in the balance water tank, the equivalent water temperature and the equivalent water temperature detection state of the balance water tank are determined according to the enabling state of the temperature sensor, the equivalent water temperature and the equivalent water temperature detection state of the balance water tank, the equivalent actual water outlet temperature of the balance water tank is determined according to the enabling state of the temperature sensor, the equivalent water temperature and the equivalent water temperature detection state of the balance water tank, when the equivalent water temperature detection state of the balance water tank fails, the equivalent actual water outlet temperature of the balance water tank can still be calculated, and then the equivalent actual water outlet temperature of the balance water tank can be used as a key parameter of the heat supply requirement of constant end equipment, so that the system can still work normally when the key temperature sensor fails, the use requirement of a user is guaranteed, and the user experience is improved.

In an embodiment, the upper portion of the balancing water tank is provided with the first temperature sensor BT1, the lower portion of the balancing water tank is provided with the second temperature sensor BT2, and the embodiment provides an implementation manner of determining the equivalent water temperature and the equivalent water temperature detection state of the balancing water tank based on the enabling state of the temperature sensor, which may be specifically performed with reference to the following steps:

Step (1): when the enabling state of the first temperature sensor is in an enabling state and the enabling state of the second temperature sensor is in a non-enabling state, the first water temperature detected by the first temperature sensor is used as the equivalent water temperature of the balance water tank, and the current state of the first temperature sensor is used as an equivalent water temperature detection state;

The first temperature sensor can detect the upper water temperature of the balance water tank, and the second temperature sensor can detect the lower water temperature of the balance water tank. The enabling states of the first temperature sensor and the second temperature sensor may be set by a user, that is, whether to use the temperature value detected by the temperature sensor for subsequent control.

The equivalent water temperature twt_bt of the above-described balance tank may also be referred to as the reduced water temperature of the balance tank (i.e., the water temperature after the upper and lower portions of the balance tank are combined). When the enabling state of the first temperature sensor is the enabling state and the enabling state of the second temperature sensor is the non-enabling state, the first water temperature TWT_Bt1 detected by the first temperature sensor is endowed with the equivalent water temperature of the balance water tank, namely TWT_BT=TWT_Bt1, and the current state of the first temperature sensor is the equivalent water temperature detection state of the balance water tank and comprises a fault state (including open circuit and short circuit) and a normal state.

Step (2): when the enabling state of the first temperature sensor is not enabled and the enabling state of the second temperature sensor is enabled, taking the second water temperature detected by the second temperature sensor as the equivalent water temperature of the balance water tank, and taking the current state of the second temperature sensor as the current state of the water temperature detection sensor;

When the enabling state of the first temperature sensor is the non-enabling state and the enabling state of the second temperature sensor is the enabling state, the second water temperature TWT_Bt2 detected by the second temperature sensor is given to the equivalent water temperature of the balance water tank because the first temperature sensor is the non-enabling state, namely TWT_BT=TWT_Bt2, and the current state of the second temperature sensor is the equivalent water temperature detection state of the balance water tank.

In one embodiment, when the enabled state of the first temperature sensor is the disabled state and the enabled state of the second temperature sensor is the disabled state, twt_bt=twt_bt 1 is set as the equivalent water temperature detection state of the balance water tank. Because the enabling states of the first temperature sensor and the second temperature sensor are not enabled, the equivalent water temperature of the balance water tank obtained in the method is not used later.

Step (3): when the enabling states of the first temperature sensor and the second temperature sensor are the enabling states, the current states of the first temperature sensor and the second temperature sensor are obtained, and the equivalent water temperature detection state of the balance water tank are determined based on the current states of the first temperature sensor and the second temperature sensor.

When the first temperature sensor and the second temperature sensor are both in the starting state, the equivalent water temperature and the equivalent water temperature detection state of the balance water tank are required to be determined according to the fault states of the first temperature sensor and the second temperature sensor. The equivalent temperature of the balance water tank is determined according to the enabling state of the temperature sensor, so that the temperature sensor is flexibly configured in the balance water tank, the equivalent temperature of the balance water tank is rapidly and accurately detected, and the convenience and the flexibility of the equivalent temperature detection of the balance water tank are improved.

In a specific embodiment, when the current states of the first temperature sensor and the second temperature sensor are both fault states, the first water temperature detected by the first temperature sensor is used as the equivalent water temperature of the balance water tank, and the equivalent water temperature detection state is determined to be the fault state;

When the current states of the first temperature sensor and the second temperature sensor are both fault states, the current state of the first temperature sensor is taken as an equivalent water temperature detection state of the balance water tank, namely the equivalent water temperature detection state of the balance water tank is the fault state, so that a user is prompted to overhaul in time.

When the current state of the first temperature sensor is a normal state and the current state of the second temperature sensor is a fault state, acquiring the current state of a backwater water temperature sensor of the water module, if the current state of the backwater water temperature sensor is the fault state, taking the first water temperature as the equivalent water temperature of the balance water tank, determining the equivalent water temperature detection state as the normal state, and if the current state of the backwater water temperature sensor is the normal state, taking the average value of the backwater water temperatures TWI detected by the first water temperature and the backwater water temperature sensor as the equivalent water temperature of the balance water tank, and determining the equivalent water temperature detection state as the normal state;

The backwater water temperature sensor is arranged at the inlet of a backwater pipeline of the water module. If the first temperature sensor is in a normal state, the second temperature sensor is in a fault state, the backwater water temperature sensor is in a fault state, twt_bt=twt_bt 1, and the current state of the first temperature sensor is taken as an equivalent water temperature detection state of the balance water tank, namely the equivalent water temperature detection state of the balance water tank is in a normal state.

If the first temperature sensor is in a normal state, the second temperature sensor is in a fault state, the backwater water temperature sensor is in a normal state, TWT_BT= (TWT_Bt1+TWI)/2 is determined, and the equivalent water temperature detection state is determined to be in a normal state.

When the current state of the first temperature sensor is a fault state and the current state of the second temperature sensor is a normal state, acquiring the current state of a backwater water temperature sensor of the water module, if the current state of the backwater water temperature sensor is the fault state, taking the second water temperature as the equivalent water temperature of the balance water tank, determining the equivalent water temperature detection state as the normal state, and if the current state of the backwater water temperature sensor is the normal state, taking the average value of the second water temperature and the backwater water temperature as the equivalent water temperature of the balance water tank, and determining the equivalent water temperature detection state as the normal state;

If the current state of the first temperature sensor is a fault state, the current state of the second temperature sensor is a normal state, the backwater water temperature sensor is a fault state, twt_bt=twt_bt 2, and the current state of the second temperature sensor is used as an equivalent water temperature detection state of the balance water tank, namely the equivalent water temperature detection state of the balance water tank is a normal state.

If the current state of the first temperature sensor is a fault state, the current state of the second temperature sensor is a normal state, the backwater water temperature sensor is a normal state, TWT_BT= (TWT_BT 2+TWI)/2 is determined, and the equivalent water temperature detection state is determined to be a normal state.

When the current states of the first temperature sensor and the second temperature sensor are both normal states, taking the average value of the first water temperature and the second water temperature as the equivalent water temperature of the balance water tank, and determining that the equivalent water temperature detection state is the normal state.

If the current states of the first temperature sensor and the second temperature sensor are both normal states, twt_bt= (twt_bt1+twt_bt2)/2, and the equivalent water temperature detection state is determined to be the normal state.

Through judging whether first temperature sensor and second temperature sensor are in fault state to select the temperature detection value that accords with the balanced water tank when temperature sensor breaks down as the equivalent temperature of balanced water tank, still can estimate the equivalent temperature of balanced water tank when the key temperature sensor of balanced water tank breaks down, thereby make the unit still can normally work, furthest guarantees user's emergent use demand, reduces because of temperature sensor maintenance not in time causes the user to use the puzzlement.

In one embodiment, the embodiment provides an implementation manner of determining the equivalent actual outlet water temperature of the balance water tank based on the enabling state of the temperature sensor, the equivalent water temperature of the balance water tank and the equivalent water temperature detection state, and the implementation manner may be specifically performed with reference to the following steps:

step 1): when the enabling states of the first temperature sensor and the second temperature sensor are not enabled, taking the water temperature of the water detected by the water temperature sensor of the water module as the equivalent actual water temperature;

If neither the first temperature sensor nor the second temperature sensor is activated, the water temperature detected by the first temperature sensor and the second temperature sensor is not used. The water outlet of the water module is provided with a water outlet temperature sensor, and as the hot water outlet of the water module is connected to the water inlet of the balance water tank, the water outlet temperature of the water module is similar to the temperature of the balance water tank, so that the equivalent actual water outlet temperature of the balance water tank is equal to the water outlet temperature detected by the water outlet temperature sensor of the water module.

Step 2): when the enabling state of the first temperature sensor or the second temperature sensor is the enabling state, judging whether the water enters a winterizing mode, if so, judging whether the equivalent water temperature detection state of the balance water tank is a fault state;

If the first temperature sensor or the second temperature sensor is in an enabling state, judging whether to enter a winterization mode, and when the unit is shut down and the outdoor environment temperature is lower than a preset temperature, judging that the pipeline is frozen at risk, and determining to enter the winterization mode.

When the equivalent water temperature detection state of the balance water tank is a fault state and the current state of the backwater water temperature sensor is a fault state, taking the water temperature of the water detected by the water outlet water temperature sensor of the water module as the equivalent actual water outlet temperature;

When the equivalent water temperature detection state of the balance water tank is a fault state and the current state of the backwater water temperature sensor is a normal state, the backwater water temperature detected by the backwater water temperature sensor of the water module is taken as the equivalent actual water outlet temperature;

when the equivalent water temperature detection state of the balance water tank is a normal state, the equivalent water temperature of the balance water tank is taken as the equivalent actual water outlet temperature.

The equivalent actual outlet water temperature of the balance water tank is determined according to the equivalent water temperature detection state of the balance water tank and the current state of the backwater water temperature sensor, so that the estimated equivalent actual outlet water temperature of the balance water tank, which is detected by the temperature sensor in the normal detection state, is detected, the detection accuracy of the equivalent actual outlet water temperature of the balance water tank is improved, and the reliability of heat supply demand distribution of the tail-end heat supply equipment can be improved.

Step 3): when the winter anti-freezing mode is not entered, if the equivalent water temperature detection state of the balance water tank is a fault state, taking the backwater water temperature detected by a backwater water temperature sensor of the water module as the equivalent actual water outlet temperature; if the equivalent water temperature detection state of the balance water tank is a normal state, the equivalent water temperature of the balance water tank is taken as the equivalent actual water outlet temperature.

When the unit is started or shut down and the outdoor environment temperature is higher than the preset temperature, the risk of freezing the pipeline does not exist, and the fact that the winterized mode is not entered is determined. And the equivalent water temperature closest to the overall water temperature of the balance water tank is determined according to the equivalent water temperature detection state of the balance water tank, so that the detection accuracy of the equivalent actual water outlet temperature of the balance water tank is improved.

Considering that the inertia of water in the unit is large, in the water temperature acquisition process, the circulating water pump needs to be started to operate so as to enable the water in the unit to circulate fully, and the condition that dead water or insufficient water stored in each tail end area is mixed is ensured not to exist, so that the accuracy of detecting the water temperature by the temperature sensor is improved.

In an embodiment, the method provided in this embodiment further includes:

When only the floor heating is controlled to be started and the enabling state of the floor heating water inlet water temperature sensor is in the starting state, a floor heating water pump is started, and the floor heating water inlet water temperature detected by the floor heating water inlet water temperature sensor is obtained; switching an operation mode of the control valve based on the floor heating inlet water temperature and the floor heating set temperature; the operation modes of the control valve comprise a water mixing mode and a heating mode.

When the terminal heating equipment is controlled to be opened and closed, if the floor heating mode is only started, the floor heating water pump is started, and the control valve of the inlet of the floor heating pipeline is controlled according to the floor heating inlet water temperature and the floor heating set temperature so as to enable the floor heating to be switched to the corresponding mode operation. When the floor heating mode is started, the operation mode of the control valve is switched according to the floor heating water inlet temperature and the floor heating set temperature so as to adjust the water temperature entering the floor heating, ensure that the floor heating water temperature meets the heat supply requirement of a user, and promote user experience.

In one embodiment, the control valve of the floor heating pipe inlet is closed when the floor heating mode is closed or when the floor heating mode is on and the enabled state of the floor heating intake water temperature sensor is an inactive state.

In one embodiment, the embodiment provides a specific implementation manner of switching the operation mode of the control valve based on the ground heating inlet water temperature and the ground heating set temperature:

when the temperature of the ground heating water inlet is higher than a first preset temperature, the control valve is controlled to switch to a water mixing mode so that low-temperature water in the water return pipeline enters the water inlet pipeline; the first preset temperature is the sum of the floor heating set temperature and the floor heating startup return difference temperature (the value range can be 1-3 ℃);

when the temperature of the ground heating inflow water is larger than or equal to the second preset temperature and smaller than or equal to the first preset temperature, the control valve is controlled to be switched between a water mixing mode and a heating mode in a periodic area; the second preset temperature is the sum of the floor heating set temperature and the floor heating shutdown return difference temperature (the value range can be 1-3 ℃);

when the temperature of the ground heating water inlet is smaller than the second preset temperature, the control valve is controlled to switch to a heating mode, so that hot water in the water inlet pipeline enters the pipeline of the ground heating.

When the floor heating water inlet temperature is higher than the first preset temperature, namely the floor heating water inlet temperature is higher, the floor heating water inlet temperature needs to be reduced, referring to a water circulation schematic diagram in a floor heating mixed water mode shown in fig. 3, water entering the floor heating can circulate with water in a return water pipeline, the temperature of the water in the return water pipeline is reduced after heat dissipation in the floor heating pipeline, and the floor heating water inlet temperature can be reduced by mixing the water in the return water pipeline into the floor heating water inlet pipeline, so that the floor heating water inlet temperature is close to the floor heating set temperature.

When the ground heating water inlet temperature is greater than or equal to the second preset temperature and less than or equal to the first preset temperature, the ground heating water inlet temperature is moderate, in order to keep the ground heating water inlet temperature, a control valve for controlling the ground heating is switched to a water mixing mode to operate for a first preset time period (the value range can be 1-3 min, preferably 3 min), and then the control valve for controlling the ground heating is switched to a heating mode to operate for a second preset time period (the value range can be 1-3 min, preferably 3 min) and the ground heating water inlet temperature is sequentially circulated, wherein the first preset time period and the second preset time period can be equal or unequal.

When the floor heating water inlet temperature is smaller than the second preset temperature, that is, the floor heating water inlet temperature is lower, the floor heating water inlet temperature needs to be raised, referring to a water circulation schematic diagram in the floor heating mode shown in fig. 4, heated water is input into the floor heating pipeline, and the floor heating water inlet temperature can be raised to enable the floor heating water inlet temperature to be close to the floor heating set temperature.

The control valve is switched according to the relation between the ground heating water inlet temperature and the ground heating set temperature so as to improve or reduce the water inlet temperature entering the ground heating, so that the ground heating water inlet temperature is kept near the ground heating set temperature, the ground heating heat supply requirement of a user is met, and the comfort of the user is improved.

According to the control method of the air source heat pump water heater, provided by the embodiment, the water temperature sensor is flexibly configured, so that the use convenience and comfort requirements of a user are improved; through temperature sensor acquisition algorithm, after important position water temperature sensor trouble, the unit still can normally work, furthest guarantees user emergent user demand, reduces because of the maintenance is untimely causes user to use puzzles.

Corresponding to the control method of the air-source heat pump water heater provided by the above embodiment, the embodiment of the present invention provides a control device of the air-source heat pump water heater, which can be applied to the air-source heat pump water heater provided by the above embodiment, referring to a schematic structural diagram of the control device of the air-source heat pump water heater shown in fig. 5, the device includes the following modules:

an acquisition module 51 for acquiring an enable state of the temperature sensor; wherein the enabled state includes an enabled state and an disabled state;

a first determining module 52 for determining an equivalent water temperature and an equivalent water temperature detection state of the balance water tank based on the enabled state of the temperature sensor; wherein the equivalent water temperature detection state comprises a fault state and a normal state;

a second determining module 53, configured to determine an equivalent actual outlet water temperature of the balance water tank based on the enabled state of the temperature sensor, the equivalent water temperature of the balance water tank, and the equivalent water temperature detection state;

The control module 54 is configured to obtain a set temperature of the terminal heat supply device, and perform on-off control on the outdoor unit based on the equivalent actual outlet water temperature and the set temperature of the balance water tank.

According to the control device of the air-source heat pump water heater, the temperature sensor is arranged in the balance water tank, the equivalent water temperature and the equivalent water temperature detection state of the balance water tank are determined according to the enabling state of the temperature sensor, the equivalent water temperature and the equivalent water temperature detection state of the balance water tank, the equivalent actual water outlet temperature of the balance water tank is determined according to the enabling state of the temperature sensor, the equivalent water temperature and the equivalent water temperature detection state of the balance water tank, when the equivalent water temperature detection state of the balance water tank fails, the equivalent actual water outlet temperature of the balance water tank can still be calculated, and then the equivalent actual water outlet temperature of the balance water tank can be used as a key parameter of the heat supply requirement of constant terminal equipment, so that the system can still work normally when the key temperature sensor fails, the use requirement of a user is guaranteed, and the user experience is improved.

Corresponding to the control method of the air-source heat pump water heater provided by the above embodiment, the present embodiment provides an air-source heat pump water heater, which includes a computer readable storage medium storing a computer program and a processor, and when the computer program is read and run by the processor, the control method of the air-source heat pump water heater provided by the above embodiment is implemented.

The embodiment also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the respective processes of the control method embodiment of the air-source heat pump water heater, and can achieve the same technical effects, so that repetition is avoided, and no further description is given here. The computer readable storage medium is, for example, a Read-Only Memory (ROM), a random access Memory (Random Access Memory RAM), a magnetic disk or an optical disk.

Of course, it will be appreciated by those skilled in the art that implementing all or part of the above-described methods in the embodiments may be implemented by a computer level to instruct a control device, where the program may be stored in a computer readable storage medium, and the program may include the above-described methods in the embodiments when executed, where the storage medium may be a memory, a magnetic disk, an optical disk, or the like.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.

Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. The control method of the air energy heat pump water heater and the air energy heat pump water heater disclosed in the embodiments correspond to the control method of the air energy heat pump water heater disclosed in the embodiments, so that the description is simpler, and relevant parts only refer to the description of the method section.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.

Claims (10)

1. The control method of the air energy heat pump water heater is characterized in that the air energy heat pump water heater comprises an outdoor unit, a plurality of tail end heat supply devices and a balance water tank, wherein the balance water tank is arranged between the outdoor unit and the tail end heat supply devices, a temperature sensor is arranged in the balance water tank, and the control method of the air energy heat pump water heater comprises the following steps:

Acquiring an enabling state of the temperature sensor; wherein the enabling state includes an enabled state and an disabled state;

Determining an equivalent water temperature and an equivalent water temperature detection state of the balance water tank based on the enabling state of the temperature sensor; wherein the equivalent water temperature detection state comprises a fault state and a normal state; determining the equivalent actual outlet water temperature of the balance water tank based on the enabling state of the temperature sensor, the equivalent water temperature of the balance water tank and the equivalent water temperature detection state;

And acquiring the set temperature of the tail end heat supply equipment, and controlling the start-stop of the outdoor unit based on the equivalent actual outlet water temperature of the balance water tank and the set temperature.

2. The control method of an air-source heat pump water heater according to claim 1, wherein a first temperature sensor is provided at an upper portion of the balance water tank, a second temperature sensor is provided at a lower portion of the balance water tank, and the step of determining an equivalent water temperature and an equivalent water temperature detection state of the balance water tank based on an enabling state of the temperature sensors includes:

When the enabling state of the first temperature sensor is the enabling state and the enabling state of the second temperature sensor is the non-enabling state, taking the first water temperature detected by the first temperature sensor as the equivalent water temperature of the balance water tank, and taking the current state of the first temperature sensor as the equivalent water temperature detection state; wherein the current state includes a fault state and a normal state;

When the enabling state of the first temperature sensor is the non-enabling state and the enabling state of the second temperature sensor is the enabling state, taking the second water temperature detected by the second temperature sensor as the equivalent water temperature of the balance water tank, and taking the current state of the second temperature sensor as the current state of the water temperature detection sensor;

when the enabling states of the first temperature sensor and the second temperature sensor are the enabling states, the current states of the first temperature sensor and the second temperature sensor are obtained, and the equivalent water temperature detection state of the balance water tank are determined based on the current states of the first temperature sensor and the second temperature sensor.

3. The method of controlling an air-source heat pump water heater according to claim 2, further comprising a water module disposed between the outdoor unit and the balance water tank, wherein the step of determining the equivalent water temperature and the equivalent water temperature detection state of the balance water tank based on the current states of the first and second temperature sensors comprises:

when the current states of the first temperature sensor and the second temperature sensor are fault states, the first water temperature detected by the first temperature sensor is used as the equivalent water temperature of the balance water tank, and the equivalent water temperature detection state is determined to be the fault state;

When the current state of the first temperature sensor is a normal state and the current state of the second temperature sensor is a fault state, acquiring the current state of a backwater water temperature sensor of the water module, if the current state of the backwater water temperature sensor is a fault state, taking the first water temperature as the equivalent water temperature of the balance water tank, determining that the equivalent water temperature detection state is a normal state, and if the current state of the backwater water temperature sensor is a normal state, taking the average value of the backwater water temperatures detected by the first water temperature and the backwater water temperature sensor as the equivalent water temperature of the balance water tank, and determining that the equivalent water temperature detection state is a normal state;

When the current state of the first temperature sensor is a fault state and the current state of the second temperature sensor is a normal state, acquiring the current state of a backwater water temperature sensor of the water module, if the current state of the backwater water temperature sensor is a fault state, taking the second water temperature as the equivalent water temperature of the balance water tank, determining that the equivalent water temperature detection state is a normal state, and if the current state of the backwater water temperature sensor is a normal state, taking the average value of the second water temperature and the backwater water temperature as the equivalent water temperature of the balance water tank, and determining that the equivalent water temperature detection state is a normal state;

When the current states of the first temperature sensor and the second temperature sensor are both normal states, taking the average value of the first water temperature and the second water temperature as the equivalent water temperature of the balance water tank, and determining that the equivalent water temperature detection state is the normal state.

4. The control method of an air-source heat pump water heater as set forth in claim 3, wherein said step of determining an equivalent actual outlet water temperature of said balance water tank based on an enabled state of said temperature sensor, an equivalent water temperature of said balance water tank, and said equivalent water temperature detection state includes:

When the enabling states of the first temperature sensor and the second temperature sensor are not enabled, taking the water temperature of the water detected by the water temperature sensor of the water module as the equivalent actual water temperature;

When the enabling state of the first temperature sensor or the second temperature sensor is the enabling state, judging whether to enter a winterizing mode, if so, judging whether the equivalent water temperature detection state of the balance water tank is a fault state;

When the equivalent water temperature detection state of the balance water tank is a fault state and the current state of the backwater water temperature sensor is a fault state, taking the water temperature of the water detected by the water outlet water temperature sensor of the water module as the equivalent actual water outlet temperature;

When the equivalent water temperature detection state of the balance water tank is a fault state and the current state of the backwater water temperature sensor is a normal state, using the backwater water temperature detected by the backwater water temperature sensor of the water module as the equivalent actual water outlet temperature;

when the equivalent water temperature detection state of the balance water tank is a normal state, the equivalent water temperature of the balance water tank is used as the equivalent actual water outlet temperature.

5. The control method of an air-source heat pump water heater as set forth in claim 4, further comprising:

When the winterized mode is not entered, if the equivalent water temperature detection state of the balance water tank is a fault state, taking the backwater water temperature detected by a backwater water temperature sensor of the water module as the equivalent actual water outlet temperature;

and if the equivalent water temperature detection state of the balance water tank is a normal state, taking the equivalent water temperature of the balance water tank as the equivalent actual outlet water temperature.

6. The control method of an air-source heat pump water heater according to claim 1, wherein the terminal heat supply device comprises a floor heater, a floor heater pump, a control valve and a floor heater inlet water temperature sensor are arranged on a water inlet pipeline between the floor heater and the balance water tank, and the control method of the air-source heat pump water heater further comprises:

When only the floor heating is controlled to be started and the enabling state of the floor heating water inlet temperature sensor is in an enabling state, starting the floor heating water pump to acquire the floor heating water inlet temperature detected by the floor heating water inlet temperature sensor;

switching the operation mode of the control valve based on the floor heating water inlet temperature and the floor heating set temperature;

the operation modes of the control valve comprise a water mixing mode and a heating mode.

7. The method of claim 6, wherein a return water pipe is further connected between the floor heating and the balance water tank, and the step of switching the operation mode of the control valve based on the floor heating water inlet temperature and the floor heating set temperature comprises the steps of:

when the floor heating water inlet temperature is higher than a first preset temperature, controlling the control valve to switch to the water mixing mode so that low-temperature water in the water return pipeline enters the water inlet pipeline; the first preset temperature is the sum of the floor heating set temperature and the floor heating startup return difference temperature;

when the ground heating water inlet temperature is greater than or equal to a second preset temperature and less than or equal to the first preset temperature, controlling the control valve to be switched between the water mixing mode and the heating mode in a periodic area; the second preset temperature is the sum of the floor heating set temperature and the floor heating shutdown return difference temperature;

when the temperature of the ground heating inflow water is smaller than the second preset temperature, the control valve is controlled to be switched to the heating mode, so that hot water in the inflow water pipeline enters the ground heating pipeline.

8. The control method of an air-source heat pump water heater as claimed in claim 3, wherein the terminal heating equipment comprises a floor heater, an indoor unit and a heat exchanger fin; the step of controlling the outdoor unit to start and stop based on the equivalent actual outlet water temperature of the balance water tank and the set temperature comprises the following steps:

When the equivalent actual water outlet temperature of the balance water tank is smaller than the set temperature, controlling the outdoor unit and the water module to start up and run so as to increase the equivalent actual water outlet temperature of the balance water tank;

When the equivalent actual water outlet temperature of the balance water tank is greater than the set temperature, the outdoor unit and the water module are controlled to stop running so as to reduce the equivalent actual water outlet temperature of the balance water tank.

9. The utility model provides a controlling means of air energy heat pump water heater, its characterized in that, air energy heat pump water heater includes off-premises station, a plurality of terminal heat supply equipment and balanced water tank, balanced water tank set up in the off-premises station with between the terminal heat supply equipment, be provided with temperature sensor in the balanced water tank, controlling means of air energy heat pump water heater includes:

The acquisition module is used for acquiring the enabling state of the temperature sensor; wherein the enabling state includes an enabled state and an disabled state;

The first determining module is used for determining the equivalent water temperature and the equivalent water temperature detection state of the balance water tank based on the enabling state of the temperature sensor; wherein the equivalent water temperature detection state comprises a fault state and a normal state;

The second determining module is used for determining the equivalent actual outlet water temperature of the balance water tank based on the enabling state of the temperature sensor, the equivalent water temperature of the balance water tank and the equivalent water temperature detection state;

and the control module is used for acquiring the set temperature of the tail end heat supply equipment, and controlling the outdoor unit to start and stop based on the equivalent actual outlet water temperature of the balance water tank and the set temperature.

10. An air-source heat pump water heater, comprising: the outdoor unit, the water module, a plurality of terminal heat supply equipment, the balance water tank and the controller, wherein the balance water tank is arranged between the outdoor unit and the terminal heat supply equipment, the water module is arranged between the outdoor unit and the balance water tank, and a temperature sensor is arranged in the balance water tank;

The controller comprising a computer readable storage medium storing a computer program and a processor, the computer program implementing the method according to any of claims 1-8 when read and run by the processor.