Civil heat pump water heater online shared circulating water pump control system

Abstract

The utility model aims to provide a civil heat pump water heater online shared circulating water pump control system, which can solve the problem of water flow faults or high-pressure faults of units due to the fact that circulating water pumps are closed in advance when part of slave units normally work, and comprises a plurality of heat pump units, hot water outlets of the heat pump units jointly communicate with a hot water supply pipeline, and a circulating pump is installed on the hot water supply pipeline. In the multiple heat pump units, one heat pump unit serves as a host, the other heat pump units serve as slaves, the host is electrically connected with a host controller, the slaves are electrically connected with slave controllers, and the input ends of all the slave controllers are connected to a control loop of the host controller; the host controller is electrically connected with a power-off time-delay relay, and the other end of the power-off time-delay relay is electrically connected to the circulating pump.

Description

Technical Field

[0001] The utility model relates to a civil heat pump water heater system, in particular to an online shared circulating water pump control system for civil heat pump water heaters. Background Art

[0002] At present, civil heat pump water heater systems are widely used, mostly in hotels, schools and other places, mainly for collective hot water supply. They mainly include multiple heat pump units, and the hot water outlets of multiple heat pump units are connected to a hot water supply pipe. A circulating pump is installed on the hot water supply pipe, and the hot water supply pipe is connected to a hot water storage tank. The water in the hot water storage tank is heated by multiple heat pump units to meet the heating demand.

[0003] When heat pump water heater units are centrally controlled, multiple units within a group often share a single circulating pump. To achieve this, a master controller is installed on one of the heat pump units, defining it as the master unit. This unit then connects to the other heat pump units and circulating water pumps. The circulating water pump can only start and stop based on signals from the master unit. During centralized shutdown of the units, the master unit may shut down the circulating water pump as well. However, due to issues with the logic control program, some slave units may not shut down, resulting in water flow or high-pressure failures. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a civil heat pump water heater online shared circulating water pump control system, which can solve the problem of water flow failure or high pressure failure of the unit due to premature shutdown of the circulating water pump when some slave units are working normally.

[0005] The utility model is realized through the following technical solutions:

[0006] A control system for a civil heat pump water heater with an online shared circulating water pump comprises a plurality of heat pump units, wherein the hot water outlets of the plurality of heat pump units are connected to a hot water supply pipe, and a circulating pump is installed on the hot water supply pipe;

[0007] Among the plurality of heat pump units, one heat pump unit is a master unit, and the remaining heat pump units are slave units, the master unit is electrically connected to a master controller, the slave units are electrically connected to slave controllers, and input ends of all slave controllers are connected to a control loop of the master controller;

[0008] The host controller is electrically connected to a power-off delay relay, and the other end of the power-off delay relay is electrically connected to the circulation pump.

[0009] Furthermore, the host is installed with a host mainboard for fixedly installing the host controller, and the slave is installed with a slave mainboard for fixedly installing the slave controller.

[0010] Furthermore, the number of the slave machines is 8-16, and the delay time of the delay relay is 5-10 minutes.

[0011] Furthermore, the return water ports of the plurality of heat pump units are commonly connected to a hot water return pipe, and the hot water supply pipe and the hot water return pipe are cyclically connected to an insulated water tank.

[0012] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0013] 1. The host controller is electrically connected to a power-off delay relay, and the other end of the power-off delay relay is electrically connected to the circulation pump. By adding the power-off delay relay to control the delayed shutdown time of the circulation pump, the circulation pump will be turned off only after all slave units are turned off. This can effectively solve the problem of water flow failure or high-voltage failure of the unit due to premature shutdown of the circulation pump when some slave units are working normally;

[0014] The utility model greatly reduces the failure rate of the unit, protects the service life of the unit components, and reduces the after-sales work of after-sales personnel;

[0015] 2. According to the number of slaves, the power-off time of the power-off delay relay can be flexibly adjusted, and the delayed shutdown time of the circulation pump can be flexibly controlled. The equipment of this solution is applicable to a wide range of scenarios and scopes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the control system for the online shared circulating water pump of the civil heat pump water heater described in the present utility model;

[0017] Figure 2 This is a schematic diagram of the electrical connection of the shared circulating water pump control system for the civil heat pump water heater of the present utility model;

[0018] In the figure: 1. Circulation pump, 2. Insulated water tank, 3. Hot water supply pipe, 4. Hot water return pipe, 5. Master unit, 6. Slave unit, 7. Master unit controller, 8. Slave unit controller, 9. Power-off delay relay. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0020] In the description of the utility model, it should be understood that the terms "front", "rear", "up", "down", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model.

[0021] like Figure 1 As shown, this embodiment discloses a control system for a civilian heat pump water heater with an online shared circulating water pump, comprising an insulated water tank 2, a circulating pump 1, and multiple heat pump units. The hot water outlets of the multiple heat pump units are connected to a hot water supply pipe 3 via a pipe. The circulating pump 1 is mounted on the hot water supply pipe 3. The return water outlets of the multiple heat pump units are connected to a hot water return pipe 4 via a pipe. The hot water supply pipe 3 and the hot water return pipe 4 circulate and connect to the insulated water tank 2. Under the action of the circulating pump 1, water from the insulated water tank 2 enters each heat pump unit through the hot water return pipe 4, is heated, and then enters the insulated water tank 2 through the hot water supply pipe 3.

[0022] like Figure 2 As shown, to achieve online control, among multiple heat pump units, one heat pump unit is designated as the master unit 5, and the remaining heat pump units are designated as slave units 6. The master unit 5 is mounted with a master motherboard for securely mounting a master controller 7, while the slave units 6 are mounted with slave motherboards for securely mounting slave controllers 8. The master unit is electrically connected to the master controller 7, while the slave units are electrically connected to the slave controllers 8. The inputs of all slave controllers 8 are connected to the control circuit of the master controller 7, allowing the master controller 7 to send signals to each slave controller 8, thereby controlling their start and stop. A power-off delay relay 9 is electrically connected to the master controller 7, the other end of which is electrically connected to the circulating pump 1.

[0023] The specific working process of the control system for the online shared circulating water pump of the civil heat pump water heater described in this embodiment is as follows:

[0024] When the host controller 7 sends a start signal to the circulation pump 1 and each slave controller 8, the circulation pump 1 is turned on, the host and slaves are turned on, the insulated water tank 2 reaches the set temperature, and the heat pump water heater needs to be shut down, the host controller 7 sends a shutdown signal to the circulation pump 1 and each slave controller 8, and each slave controller 8 controls the slave to shut down. Under the delay effect of the power-off delay relay 9, after waiting for all slaves to shut down, the circulation pump 1 is turned off, which can effectively solve the problem of water flow failure or high-voltage failure of the unit due to premature shutdown of the circulation water pump when some slave units are working normally.

[0025] According to actual experience, when there are eight heat pump units online, it takes three minutes for all heat pump units to shut down, so the delay time of the power-off delay relay 9 is set to five minutes; when there are ten heat pump units online, it takes four minutes for all heat pump units to shut down, so the delay time of the power-off delay relay 9 is set to six minutes.

Claims

1. A civil heat pump water heater online shared circulating water pump control system, characterized in that: It comprises a plurality of heat pump units, wherein the hot water outlets of the plurality of heat pump units are connected to a hot water supply pipe, and a circulating pump is installed on the hot water supply pipe; Among the plurality of heat pump units, one heat pump unit is a master unit, and the remaining heat pump units are slave units, the master unit is electrically connected to a master controller, the slave units are electrically connected to slave controllers, and input ends of all slave controllers are connected to a control loop of the master controller; The host controller is electrically connected to a power-off delay relay, and the other end of the power-off delay relay is electrically connected to the circulation pump.

2. The civil heat pump water heater online shared circulating water pump control system according to claim 1 is characterized in that: The host is equipped with a host mainboard for fixing the host controller, and the slave is equipped with a slave mainboard for fixing the slave controller.

3. The civil heat pump water heater online shared circulating water pump control system according to claim 1, characterized in that: The number of the slave machines is 8-16, and the delay time of the delay relay is 5-10 minutes.

4. The on-line shared circulating water pump control system for civil heat pump water heaters according to any one of claims 1 to 3, characterized in that: The return water ports of the plurality of heat pump units are commonly connected to a hot water return pipe, and the hot water supply pipe and the hot water return pipe are cyclically connected to an insulated water tank.

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