CN106016740A - Instant heat pump type kitchen water heater - Google Patents

Abstract

The invention relates to an instant heat pump kitchen water heater. A small water tank is connected to an air source heat pump system through a pipeline. The air source heat pump system heats the water in the small water tank to reduce the power consumption of the kitchen water heater, prolong the hot water production time, and improve The utilization rate of the kitchen water heater; the water tank assembly includes a small water tank, a water level gauge, and a temperature sensor. The water level gauge and the temperature sensor are placed inside the small water tank to detect the water level and water temperature in the small water tank respectively; the solenoid valve is installed on the water inlet pipeline of the small water tank The temperature sensor is connected to the air source heat pump system through the control system and the protection device. When the measured water temperature is lower than the set water temperature, the control system and the protection device start the operation of the air source heat pump system. The invention is novel in design, occupies a small space, has the advantages of high efficiency, energy saving, intelligence, etc., is beneficial to improving the market competitiveness of products, and will have very huge economic, social and environmental benefits.

Description

Instant Heat Pump Kitchen Water Heater

technical field

The invention relates to a small-capacity wall-mounted water heater, in particular to a small instant water heater for kitchens.

Background technique

With the improvement of social life, people's requirements for quality of life are also gradually improved, and water heaters are widely used in people's lives as daily necessities. Xiaochubao refers to a small-capacity wall-mounted water heater below 20 liters installed in the kitchen for washing hands, dishes, and vegetables. It has the advantages of being hot and ready to use, low in price, convenient and quick. Kitchen appliances can be divided into heat-storage electric water heaters and instant electric water heaters. Heat-storage kitchen appliances need to be powered on for a period of time before users can use them. Moreover, the inside of the water tank of this kind of kitchen appliances is prone to fouling, which is extremely serious. affect the use of users. Although the instant electric water heater can produce hot water immediately, the water flow is limited, and the temperature of the water is often too low under large flow, which greatly affects the use of users. More importantly, whether it is an instant heat type or a heat storage type electric water heater, all use electric heating, which has the disadvantages of high energy consumption, poor safety, and short service life.

Therefore, need to propose a kind of novel instantaneous heat pump water heater.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies and defects of the existing kitchen instant water heaters, and propose an instant heat pump kitchen water heater, which can enable the water heater to provide sufficient hot water in time, preheat and keep warm at the same time, and greatly improve the use of kitchen treasures Efficiency, and energy saving and environmental protection, safe and efficient, easy to maintain.

To achieve the above object, the present invention adopts the following technical solutions:

An instant heat pump kitchen water heater, including a small water tank, a water tank assembly, an air source heat pump system, a control system and a protection device, characterized in that: the small water tank is connected to the air source heat pump system through a pipeline, and the air source heat pump system is connected to the small water tank Internal water heating is used to reduce the electricity consumption of the kitchen water heater, extend the hot water production time, and improve the utilization rate of the kitchen water heater; the water tank assembly includes a small water tank, a water level gauge, and a temperature sensor. The water level gauge and temperature sensor are placed inside the small water tank, respectively. It is used to detect the water level and water temperature in a small water tank; the temperature sensor is connected to the air source heat pump system through the control system and protection device. When the measured water temperature is lower than the set water temperature, the control system and protection device start the air source heat pump system to run.

The small water tank is connected in series with the air source heat pump system, wherein the condenser in the air source heat pump system is placed in the small water tank, and the outlet of the condenser is connected to the coil inlet of the condenser through a throttling device, an evaporator, and a compressor in sequence, Form a heating circuit.

The small water tank is connected in parallel with the air source heat pump system, wherein the condenser in the air source heat pump system is placed outside the small water tank, and a cold water inlet is provided at the bottom of the small water tank, and the water inlet is connected to a flow equalizer, so that the water entering the small water tank The cold water inside the water tank forms thermal stratification inside the small water tank, and the top of the small water tank is provided with a hot water outlet, the hot water outlet is connected to one water inlet of the water mixing valve, and the other water inlet of the water mixing valve is connected through the condenser The outlet of the water pump and the outlet of the condenser are connected to the inlet of the condenser through the compressor, evaporator, and throttling device in turn to form a heating circuit; when the water temperature inside the small water tank is lower than the set value, the air source heat pump system starts and the water mixing valve And the water pump runs, so that the hot water used by users is supplied by the small water tank and the air source heat pump system at the same time.

The volume range of the small water tank is 1-20L.

The control system and protection device include a main control chip, overload protection and a measurement signal port. Wherein, the connection of the measurement signal port includes a water level gauge, a temperature sensor, and a pressure sensor, which are respectively used to measure the water level of the water tank, the temperature of the water tank, the temperature of the compressor, and the suction and discharge pressure of the compressor.

The condenser is a condensing coil or a casing heat exchanger or a plate heat exchanger.

The throttling device is a capillary tube or a thermal expansion valve or an electronic expansion valve.

The compressor is a piston compressor, a rotary compressor or a scroll compressor.

The evaporator is an air-cooled evaporator or a water-cooled evaporator. The air-cooled evaporator adopts a tube-fin heat exchanger to absorb heat from the environment. heat.

Compared with prior art, the beneficial effect of the present invention:

1. The present invention greatly reduces the electricity consumption of traditional kitchen treasures, prolongs the hot water output time, improves the utilization efficiency of kitchen treasures, and has the advantages of energy saving, environmental protection, high efficiency and safety;

2. The position of the condenser in the present invention is flexible, it can be located inside the water tank, and can be connected with the water tank in parallel through a three-way valve to provide hot water, which improves the efficiency of the water tank;

3. In the small water tank of the present invention, the water inlet mode is from the bottom to the top, which is conducive to the formation of hot and cold water stratification, which maximizes the comprehensive utilization of the water tank and improves the overall economy of the kitchen treasure;

4. The present invention can also combine wireless sensors, wireless controllers and wireless power collectors at the same time, and connect with the user's mobile terminal through the cloud server, and can switch the heat pump unit on and off at any time through the mobile terminal to realize real-time remote control;

5. The instant heat pump kitchen treasure described in the present invention has relatively mature technology and low maintenance cost, which expands the application range of the heat pump system. At the same time, it is more suitable for our country's national conditions, and it is also an excellent way to partially replace the electric heating kitchen treasures in our existing families. It will have very huge economic, social and ecological benefits, and has a very broad application prospect.

The technical problem to be solved by the present invention is to propose a set of kitchen water heater based on the heat pump system, which can make The kitchen treasure water heater prolongs the hot water production time, can be used for a long time, and improves the system efficiency, reduces the cost of using the kitchen treasure, and expands the application range of the heat pump system. In addition, the present invention also has the advantages of simple and compact structure, easy manufacture and low cost.

Description of drawings

Fig. 1 is the schematic diagram of the series connection form of the instant heat pump water heater of the present invention;

Fig. 2 is a schematic diagram of the parallel connection form of the instantaneous heat pump water heater of the present invention.

detailed description

Below in conjunction with accompanying drawing, further elaborate the present invention. It should be understood that these implementations are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teaching content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

As shown in Figures 1 and 2, an instant heat pump water heater includes a small water tank 1, a water tank assembly, an air source heat pump system, a control system and a protection device.

The small water tank 1 is connected to the air source heat pump system through pipelines, and the air source heat pump system heats the water in the small water tank, which is used to reduce the electricity consumption of the kitchen water heater, prolong the hot water production time, and improve the utilization rate of the kitchen water heater; the water tank components include a small water tank, Water level gauge, temperature sensor 6, water level gauge and temperature sensor 6 are placed inside the small water tank 1, respectively used to detect the water level and water temperature in the small water tank 1; the solenoid valve is installed on the water inlet pipeline of the small water tank; the temperature sensor 6 passes through the control system The air source heat pump system is connected with the protection device. When the measured water temperature is lower than the set water temperature, the control system and the protection device start the operation of the air source heat pump system.

As shown in Figure 1, the small water tank 1 is connected in series with the air source heat pump system, wherein the condenser 2 in the air source heat pump system is placed in the small water tank 1, and the coil outlet of the condenser 2 passes through the throttling device 4, evaporation The device 5 and the compressor 3 are connected to the coil inlet of the condenser 2 to form a heating circuit.

As shown in Figure 2, the small water tank 1 is connected in parallel with the air source heat pump system, wherein the condenser 2 in the air source heat pump system is placed outside the small water tank 1, and the bottom of the small water tank 1 is provided with a cold water inlet, the water inlet Connect the flow equalizer 7 so that the cold water entering the small water tank 1 forms thermal stratification inside the small water tank 1. The top of the small water tank 1 is provided with a hot water outlet, and the hot water outlet is connected to a water inlet of the water mixing valve A. The other water inlet of water valve A is connected to the outlet of water pump P through condenser 2, and the outlet of condenser 2 is connected to the inlet of condenser 2 through compressor 3, evaporator 5, and throttling device 4 to form a heating circuit; when small When the water temperature inside the water tank 1 is lower than the set value, the air source heat pump system starts, the water mixing valve A and the water pump P operate, so that the hot water used by users is supplied by the small water tank 1 and the air source heat pump system at the same time.

The volume range of the small water tank 1 is 1-20L. The condenser 2 is a condensing coil or a casing heat exchanger or a plate heat exchanger. The throttling device 4 is a capillary tube or a thermal expansion valve or an electronic expansion valve. The compressor 3 is a piston compressor, a rotary compressor or a scroll compressor. The evaporator 5 is an air-cooled evaporator or a water-cooled evaporator. The air-cooled evaporator adopts a tube-fin heat exchanger to absorb heat from the environment, and the water-cooled evaporator adopts a sleeve-type heat exchanger or a plate heat exchanger to absorb heat from domestic tap water. .

The control system and protection device include main control chip, overload protection and measurement signal port. Wherein, the connection of the measurement signal port includes a water level gauge, a temperature sensor, and a pressure sensor, which are respectively used to measure the water level of the water tank, the temperature of the water tank, the temperature of the compressor, and the suction and discharge pressure of the compressor.

In order to solve the problems of excessive energy consumption and low safety and reliability of the existing kitchen treasures, the present invention adopts an air source heat pump as the heat source of the system, which not only improves the system efficiency, but also solves the problem of the safety of the kitchen treasures. , can also greatly improve user comfort.

When the kitchen treasure system of the present invention is in an idle state, the temperature sensor in the water tank will monitor the internal water temperature of the water tank in real time, and when the measured water temperature is lower than the set water temperature, the heat pump system will start. The refrigerant passes through the compressor, enters the condenser to release heat, then enters the dry filter, then enters the throttle valve to reduce temperature and pressure, then enters the evaporator to evaporate and cool, and finally enters the compressor again to increase temperature and pressure to complete the refrigerant cycle.

At the same time, according to the system principle of Fig. 1 and Fig. 2, the instantaneous heat pump water heater of the present invention has two operation modes:

1) Operation mode 1: According to the system principle described in Figure 1, the coil of the condenser of the air source heat pump system is located inside the small water tank. When the user stops using the small water tank and the temperature in the small water tank is lower than the set value, the air source heat pump system starts to heat the water in the small water tank, and finally reaches the shutdown temperature, the air source heat pump system stops running, and the water in the small water tank is completed. of water heating.

2) Operation mode 2: According to the system principle described in Figure 2, the coil of the condenser of the air source heat pump system is located outside the small water tank. When the user stops using and the water temperature in the small water tank is lower than the set value, the air source heat pump system starts to start at this time, and at the same time, the water mixing valve A and the water pump P operate, and the water in the small water tank enters the water heat through the water pump P. The heat exchanger is then heated to raise the temperature, then flows out of the heat exchanger, and returns to the small water tank through the water mixing valve A. When the water temperature in the small water tank reaches the set value, the air source heat pump system stops running to complete the heating of the water in the small water tank.

When the air source heat pump system of the present invention is in use, according to the system principle of Fig. 1 and Fig. 2, the instant heat pump water heater of the present invention has two usage modes:

1) Operation mode 1: According to the principle of the system described in Figure 1, when the user needs to use hot water, the cold water passes through the flow equalizer from the bottom of the small water tank, enters the inside of the small water tank, and forms thermal stratification inside the small water tank, while the hot water It flows out from the top of the small water tank for users to use;

2) Operation mode 2: According to the principle of the system described in Figure 2, when the user needs to use hot water, the cold water passes through the flow equalizer from the bottom of the small water tank, enters the inside of the small water tank, and forms thermal stratification inside the small water tank, while the hot water Drains from the top of the small tank. When the water temperature inside the small water tank is lower than the set value, the air source heat pump system starts. At this time, the water mixing valve A and the water pump P operate, and the hot water used by users is supplied by the small water tank and the air source heat pump system at the same time.

Therefore, according to the schematic diagrams 1 and 2 of the system, according to whether the condenser is located in the water tank, the system of the present invention can be divided into series type and parallel type. The series heat pump water heater only provides hot water to users from a small water tank, while the parallel heat pump water heater can provide hot water to users simultaneously from a small water tank and an air source heat pump system.

Since the water heater of the present invention uses a heat pump to heat hot water, compared with the traditional electric heating kitchen treasure system, the overall economic benefit of the system of the present invention is higher due to the higher thermal efficiency of the air source heat pump system of the present invention. Preliminary calculation results show that the overall economic benefit of the heat pump kitchen water heater can be increased by about 60% compared with the traditional electric heating kitchen treasure system, and the hot water output time of the kitchen treasure can be extended, which expands the application range of the kitchen treasure system.

Claims (9)

1. an instant heating type heat pump Water heater for kitchen; including small-sized water tank (1), cistern assembly, air source heat pump system, control system and protection device; it is characterized in that: described small-sized water tank (1) connects air source heat pump system by pipeline; water in small-sized water tank is heated by air source heat pump system; for reducing the power consumption of Water heater for kitchen; extend and the hot water time, improve Water heater for kitchen utilization rate；It is internal that cistern assembly includes that small-sized water tank, limnimeter, temperature sensor (6), limnimeter and temperature sensor (6) are positioned over small-sized water tank (1), is respectively intended to detect the water level in small-sized water tank and water temperature；Temperature sensor (6) is connected air source heat pump system by control system with protection device, and when tested water temperature is less than set water temperature, control system and protection device start air source heat pump system and run.

Instant heating type heat pump Water heater for kitchen the most according to claim 1, it is characterized in that: described small-sized water tank (1) is connected in series with air source heat pump system, wherein, condenser (2) in air source heat pump system is placed in small-sized water tank (1), the outlet of condenser (2) passes sequentially through throttling arrangement (4), vaporizer (5), the import of compressor (3) connection condenser (2), forms heating circuit.

nullInstant heating type heat pump Water heater for kitchen the most according to claim 1，It is characterized in that: described small-sized water tank (1) is connected in parallel with air source heat pump system，Wherein，Condenser (2) in air source heat pump system is placed in outside small-sized water tank (1)，Described small-sized water tank (1) bottom is provided with cold water inlet，Water inlet connects current equalizer (7)，The cold water making the small-sized water tank of entrance (1) internal is internally formed thermally stratified layer at small-sized water tank，Described small-sized water tank (1) top is provided with hot water outlet，Hot water outlet connects a water inlet of water mixing valve (A)，Water mixing valve (A) another water inlet connected condenser (2) and connected water pump (P) outlet，The outlet of condenser (2) passes sequentially through compressor (3)、Vaporizer (5)、Throttling arrangement (4) connects the import of condenser (2)，Form heating circuit；When small-sized water tank (1) water temperature inside is less than setting value, air source heat pump system starts, water mixing valve (A) and water pump (P) run, and the hot water making user be used is supplied simultaneously to by small-sized water tank (1) and air source heat pump system.

Instant heating type heat pump Water heater for kitchen the most according to claim 1, it is characterised in that: the volume scope of described small-sized water tank (1) is 1 ~ 20L.

Instant heating type heat pump Water heater for kitchen the most according to claim 1, it is characterised in that: described control system and protection device include main control chip, overload protection and measure signal port；Wherein, measure signal port connection and include limnimeter, temperature sensor, pressure transducer, be respectively used to measure cistern water level, water tank temperature and compressor temperature, compressor Suck and exhaust pressure.

6. according to the instant heating type heat pump Water heater for kitchen described in Claims 2 or 3, it is characterised in that: described condenser (2) is condenser coil or double pipe heat exchanger or plate type heat exchanger.

7. according to the instant heating type heat pump Water heater for kitchen described in Claims 2 or 3, it is characterised in that: described throttling arrangement (4) is capillary tube or heating power expansion valve or electric expansion valve.

8. according to the instant heating type heat pump Water heater for kitchen described in Claims 2 or 3, it is characterised in that: described compressor (3) is piston compressor or rotor-type compressor or scroll compressor.

9. according to the instant heating type heat pump Water heater for kitchen described in Claims 2 or 3, it is characterized in that: described vaporizer (5) is wind-cooled evaporator or water-cooled vaporizer, wind-cooled evaporator uses fin-tube type heat exchanger, absorb amount of heat, water-cooled vaporizer uses double pipe heat exchanger or plate type heat exchanger, absorbs the heat of household tap water.