CN102645044A - Direct-expansion solar heat pump water heating system - Google Patents

Abstract

The invention discloses a heat absorption core of a collector used for a solar heat pump water heating system, a naked plate type collector, a collector with a glass cover plate as well as a direct-expansion solar heat pump water heating system. The naked plate type collector and collector with the glass cover plate are connected through an electromagnetic valve and a refrigerant copper pipe and, a PLC (Programmable Logic Controller) controls the open and close of the electromagnetic valve according to different external conditions so as to realize the separated operation and series operation of the naked plate type collector and the collector with the glass cover plate. Refrigerant gas through evaporation and compression enters a plate-type heat exchanger so as to carry out countercurrent flow heat exchange with circulating water, hot water temperature is fed back to a controller through a temperature sensor, and the controller controls the open and stop of a compressor. With the structure, the system has the advantages of high energy efficiency ratio, good environmental adaptation, simple structure and the like and is environment-friendly and energy-saving.

Description

A direct expansion solar heat pump water heating system

technical field

The invention relates to a solar water heating device, in particular to a direct expansion solar heat pump water heating system, which belongs to the technical field of heating, air conditioning and domestic hot water equipment.

Background technique

As the largest renewable energy source on earth, solar energy has gained more utilization and development in recent years. The direct expansion solar heat pump system (DX-SAHP) uses the solar collector plate as the evaporator of the heat pump system. The refrigerant is filled into the heat collector plate and absorbs solar energy and heat from the surrounding environment when it flows through the heat collector/evaporator. The heat of condensation is then transferred to the heated substance via a heat pump cycle. Compared with the non-direct expansion solar heat pump, the direct expansion solar heat pump saves the heat exchange equipment between the heat collection cycle and the heat pump cycle in the non-direct expansion system. It has simple structure, low cost, good performance, and long equipment life. It has become increasingly popular focus of research attention.

In the direct expansion system, the structure of the solar collector/evaporator has a great influence on the performance of the heat pump system. Since the heat collector and evaporator are combined in structure and function, the solar heat collection temperature is closer to the refrigerant evaporation temperature, the heat collection temperature is in a lower temperature range, and the heat collection efficiency is higher. The heat collector can also achieve better heat collection performance, and with the increase of the refrigerant evaporation temperature, the performance of the heat pump system will also be greatly improved.

Wang Ruzhu of Shanghai Jiaotong University applied for the invention patent "Direct Expansion Solar Heat Pump Water Heater" in 2001, the authorized publication number: CN2520486, and the application number: 01276456Y. The patent name is a direct expansion solar heat pump water heater. As a heat pump evaporator, the evaporation process of refrigerant and the heat collection process of solar energy are carried out simultaneously in one device. The heat collector adopts a bare plate heat collector without glass cover plate and bottom insulation as the evaporator. The copper pipe of the refrigerant is an elbow pipe, which is welded on the heat collecting plate. The outlet of the evaporator is connected with the suction port of the compressor. The exhaust port is connected to the inlet of the condenser, and the condenser is immersed in the water tank, and then returns to the evaporator through the dryer and expansion valve to complete the closed cycle. This system improves the heat collection performance of the solar collector and the thermal performance of the heat pump, which has a significant energy saving effect. But the disadvantage is that the surface of the submerged condenser heat exchanger is easy to be corroded, it is inconvenient to install and clean, and the heat exchange efficiency is not high. At the same time, the connecting pipeline is long, and if the refrigerant leaks, it will pollute the water quality; the evaporator is a series type. There is uneven distribution of refrigerant during operation, and the energy is not fully utilized. The refrigerant will produce a pressure drop during the flow process. At the same time, the heat collection area cannot be controlled in real time according to changes in the external environment, which affects system performance.

Contents of the invention

The object of the present invention is to provide a heat-absorbing core for a heat collector of a solar heat pump hot water system.

The object of the present invention is to provide a bare plate heat collector.

The object of the present invention is to provide a heat collector with a glass cover.

The object of the present invention is to provide a direct expansion solar heat pump water heating system to overcome the above-mentioned shortcomings and deficiencies in the prior art.

The system adopts a heat collector/evaporator with a more reasonable structure, which can properly control the heat collection area, and a plate condenser with a high heat exchange efficiency and a relatively stable use. According to different external environments, the heat collector/evaporator is properly adjusted. The heat collecting area can improve the operating performance of the system and reduce the operating cost of the system. At the same time, the structure is more compact and the applicability is wider.

The technical problem to be solved in the present invention can be realized through the following technical solutions:

As a first aspect of the present invention, a heat-absorbing core for a heat collector of a solar heat pump hot water system is characterized in that it includes: a main pipe, a horizontally arranged tubular structure, with refrigerant inside; and strips, It is vertically arranged and consists of refrigerant copper tubes and aluminum fins, wherein the refrigerant copper tubes are in vertical communication with the main pipe, and the aluminum fins are arranged around the refrigerant copper tubes.

As a second aspect of the present invention, a bare-plate heat collector with a heat-absorbing core as described above is characterized in that it includes: a heat-absorbing core made of header pipes and strips and an anodic oxidation coating, wherein the The main pipe is a tubular structure arranged horizontally, and there is refrigerant therein; the strip, arranged vertically, is composed of refrigerant copper tubes and aluminum fins, the refrigerant copper tubes are vertically connected to the main pipe, and the aluminum fins It is arranged around the refrigerant copper pipe; the surface of the strip is coated with anodized coating.

As a second aspect of the present invention, a heat collector with a glass cover for a heat-absorbing core as described, is characterized in that it includes: a heat-absorbing core made of a header pipe and strips, an anodized coating , a glass cover plate, a back plate and a frame, wherein the main pipe is a horizontally arranged tubular structure with refrigerant inside; the strips are vertically arranged and composed of refrigerant copper tubes and aluminum fins, and the refrigeration The refrigerant copper pipe is in vertical communication with the main pipe, and the aluminum fins are arranged around the refrigerant copper pipe; the surface of the strip is coated with anodized coating; the glass cover is arranged on the front of the heat-absorbing core ; The backboard is made of heat-insulating material into a plate-like structure, and is arranged on the back of the heat-absorbing core; the frame is wrapped around the heat-absorbing core.

As a third aspect of the present invention, a direct expansion solar heat pump water heating system made of the heat collector as described is characterized in that it includes: at least one heat collector, a gas-liquid separator, a compressor, A refrigerant cycle composed of a condenser, a liquid storage tank, and a thermal expansion valve; and a water cycle composed of a condenser, a circulating water pump, and a heat storage tank.

Further, a direct expansion solar heat pump water heating system of the present invention may also have the following features: it also includes: a temperature sensor for detecting the gas temperature at the suction port of the compressor; a temperature sensor for detecting the the temperature of the water in the heat storage tank; and a controller for detecting the running current of the compressor and the circulating water pump.

Further, a direct expansion solar heat pump water heating system of the present invention may also have the following characteristics: wherein, the number of the heat collectors is two, each of the heat collectors is connected by a solenoid valve and a gas-liquid separator Each of the heat collectors is connected to the thermal expansion valve through a solenoid valve, and the two heat collectors are connected in series through a solenoid valve.

Further, a direct expansion solar heat pump water heating system of the present invention may also have the following characteristics: wherein, the heat collector includes: a bare plate heat collector and a heat collector with a glass cover plate, the bare plate heat collector Two ends of at least one of the heater and the heat collector with a glass cover are respectively connected to the gas-liquid separator and the thermal expansion valve.

Further, a direct expansion solar heat pump water heating system of the present invention may also have the following features: wherein, the condenser is a plate heat exchanger, and the plate condenser of the plate heat exchanger is composed of a plurality of corrugated plates installed, the refrigerant and the water perform countercurrent heat exchange in the plate heat exchanger.

Beneficial effects of the present invention:

The strips are rolled from refrigerant copper tubes and aluminum fins. This structure solves the problem of uneven refrigerant distribution and large pressure drop in conventional serpentine tube collectors.

Both ends of the refrigerant copper pipe are vertically connected to the main pipe. This structure will greatly reduce the pressure loss during operation, and at the same time make the heat of the collector evenly utilized.

Bare plate heat collector, the surface of the strip is coated with anodized coating, this selective absorption coating has the advantages of high absorption rate, low reflectivity and high heat collection efficiency. It has the advantages of low cost, light weight, convenient transportation and installation.

For the collector with glass cover plate, the upper part of the heat-absorbing core is equipped with an insulating glass cover plate, which is placed in the aluminum alloy frame, and the lower part of the heat-absorbing core is equipped with a back plate of thermal insulation material to prevent heat from radiating out. It is suitable for seasons with cold climate and low solar radiation intensity.

The two solar thermal collectors are connected to the solenoid valve through pipelines, and the solenoid valve between the collectors is closed/opened according to different external environments, so as to realize the series connection and independent operation of the thermal collectors.

The temperature sensor, temperature sensor, compressor, and circulating water pump are all connected to the controller to ensure the safety and stability of the system.

The bare plate heat collector 1 and the heat collector with a glass cover are connected to solenoid valve C, solenoid valve D, solenoid valve E, solenoid valve F and solenoid valve G through refrigerant pipelines. According to changes in the external environment, the opening and closing of the solenoid valves are controlled through the PLC touch screen interface of the controller to realize the separate or simultaneous operation of the bare plate collector and the collector with a glass cover. The liquid storage tank is installed in Before the expansion valve, it is used to automatically balance the refrigerant flow in the system.

The condenser is not a conventional submerged structure, but a plate heat exchanger. Not only is the structure compact, the pressure is better, and it can form turbulent flow and high heat transfer coefficient at a small Re number. Refrigerant and circulating water conduct countercurrent heat exchange in the plate heat exchanger, and the circulating water is pumped into the plate heat exchanger, and the power and flow of the water pump are adjusted by the controller, which solves the heat exchange efficiency of conventional submerged heat collectors. Low, the surface is susceptible to corrosion and other disadvantages.

Description of drawings

Figure 1 Schematic diagram of the direct expansion solar heat pump water heating system.

Fig. 2 Schematic diagram of the structure of the heat-absorbing core of the collector.

Reference signs:

Bare plate heat collector 1, heat collector with glass cover plate 2, gas-liquid separator 3, compressor 4, plate heat exchanger 5, liquid storage tank 6, thermal expansion valve 7, circulating water pump 8, heat storage Water tank 9, controller 10, temperature sensor 11, temperature sensor 12.

Solenoid valve A21, solenoid valve B22, solenoid valve C23, solenoid valve D24, solenoid valve E25, solenoid valve F26, solenoid valve G27, solenoid valve H28.

Main pipe 13, aluminum fin 14, refrigerant copper tube 15.

Detailed ways

The present invention will be further described below in conjunction with specific embodiments. It should be understood that the following examples are only used to illustrate the present invention but not to limit the scope of the present invention.

Example

Figure 1 Schematic diagram of the direct expansion solar heat pump water heating system.

As shown in Figure 1, a direct expansion solar heat pump water heating system includes: a bare plate heat collector 1, a heat collector 2 with a glass cover, a gas-liquid separator 3, a compressor 4, and a plate heat exchanger 5 (condenser), liquid storage tank 6, thermal expansion valve 7, circulating water pump 8, heat storage tank 9, controller 10, temperature sensor 11 and temperature sensor 12.

The direct expansion solar heat pump water heating system has two cycles of refrigerant cycle and water cycle, as well as a control circuit.

Among them, the refrigerant cycle: consists of a bare plate collector 1, a collector with a glass cover 2, a gas-liquid separator 3, a compressor 4, a plate heat exchanger 5, a liquid storage tank 6, and a thermal expansion valve 7 , solenoid valve C23, solenoid valve D24, solenoid valve E25, solenoid valve F26, solenoid valve G27 and temperature sensor 11.

In the refrigerant cycle, the outlet pipeline of the bare plate heat collector 1 and/or the heat collector 2 with a glass cover plate passes through the gas-liquid separator 3 and is connected to the suction port of the compressor 4, and the compressor 4 The exhaust port is connected to the refrigerant inlet of the plate heat exchanger 5, and the refrigerant pipeline at the outlet of the plate heat exchanger 5 passes through the liquid storage tank 6 to adjust the refrigerant amount and the thermal expansion valve 7, and then connects to the bare plate heat collector 1 and/or collector 2 inlets with glass cover.

Among them, the water cycle: consists of a plate heat exchanger 5, a circulating water pump 8, a heat storage tank 9, a solenoid valve A21, a solenoid valve B22, a solenoid valve H28 and a temperature sensor 12.

In the water cycle, the tap water in the hot water storage tank 9 is pressurized by the circulating water pump 8 and then enters the plate heat exchanger 5 for countercurrent heat exchange with the refrigerant cycle. The tap water is heated by the plate heat exchanger 5 and then flows back into the hot water storage. Box 9.

Solenoid valve A21 is connected to tap water inlet, solenoid valve B22 is connected to domestic hot water outlet, solenoid valve C23, solenoid valve D24, solenoid valve E25, solenoid valve F26, solenoid valve G27 are connected to refrigerant pipeline, solenoid valve H28 is connected to circulating water pump 8 water inlet.

As shown in FIG. 1 , the control circuit is composed of a compressor 4 , a circulating water pump 8 , a temperature sensor 11 , a temperature sensor 12 and a controller 10 .

The controller 10 is used to detect the running current of the compressor 4 and the circulating water pump 8 . The temperature sensor 11 detects the gas temperature at the suction port of the compressor 4 . The temperature sensor 12 detects the temperature of the water in the hot water storage tank 9 .

Further explain the structure of the system.

The bare plate heat collector 1 and the heat collector 2 with a glass cover have the functions of heat collection and evaporation, and the outlets of the two are connected to one end of the gas-liquid separator 3, and the other end of the gas-liquid separator 3 is connected to the compressor The suction port of the compressor 4 and the exhaust port of the compressor 4 are connected to the refrigerant side inlet of the plate heat exchanger 5, the outlet of the plate heat exchanger 5 is connected to the liquid storage tank 6, and the liquid storage tank 6 is connected to the thermal expansion valve 7 , the thermal expansion valve 7 is connected to the bare plate heat collector 1 and the heat collector 2 with a glass cover, and the refrigerant pipelines are used to connect each device to form a closed circulation channel on the refrigerant side.

The bare plate collector 1 is connected to the gas-liquid separator 3 through the solenoid valve F26, and the collector 2 with the glass cover is connected to the gas-liquid separator 3 through the solenoid valve G27. The heat collectors 2 on the cover plate are connected in series through the solenoid valve E25.

The bare plate heat collector 1 is connected with the thermal expansion valve 7 through the solenoid valve D24. The heat collector 2 with the glass cover is connected with the thermal expansion valve 7 through the solenoid valve C23.

The condenser is a plate heat exchanger 5. The water circulation outlet at one end of the heat storage tank 9 is connected to the circulating water pump 8 through the solenoid valve H28 , and the outlet of the circulating water pump 8 is connected to the water circulation inlet of the plate heat exchanger 5 . The water circulation outlet of the plate heat exchanger 5 is connected with the water circulation inlet of the heat storage tank 9 . The water inlet at the other end of the heat storage tank 9 is connected to the tap water pipe through the electromagnetic valve A21, and the water outlet at the other end of the circulating water tank 9 is connected to the domestic hot water pipeline through the electromagnetic valve B22, and this part completes the closed water cycle.

The heat collector of the present invention adopts a bare-plate heat collector 1 and a heat collector 2 with a glass cover, and at least one of the two ends of the bare-plate heat collector 1 and the heat collector 2 with a glass cover are connected to the Liquid separator 3 is connected with thermal expansion valve 7. Both the bare-plate heat collector 1 and the heat collector 2 with a glass cover are made of heat-absorbing cores.

Fig. 2 is a schematic structural diagram of the heat-absorbing core of the heat collector. As shown in Fig. 2 , the heat-absorbing core includes: a main pipe 13 and strips.

The main pipe 13 is a tubular structure arranged horizontally, and there is refrigerant in the main pipe 13 . The strips 14 are arranged longitudinally and are rolled from aluminum fins 14 and refrigerant copper tubes 15 , and the aluminum fins 14 are arranged around the refrigerant copper tubes 15 . The refrigerant copper pipe 15 is in vertical communication with the main pipe 13, and several strips are connected with the main pipe 13 to form a heat-absorbing core.

The bare-plate heat collector 1 is only composed of a heat-absorbing core, and the surface of the heat-absorbing core is coated with an anodic oxidation coating, and the absorption rate is greater than 92%.

Bare plate collector 1, without glass cover plate and bottom insulation, is only composed of header pipes and composite heat-absorbing strips, which has the advantages of low cost, light weight, convenient transportation and installation, etc. The strips are made of refrigerant copper tubes and aluminum plates It is rolled to form a heat-absorbing core, and the surface of the strip is coated with an anodic oxidation coating. This selective absorption coating has the advantages of high absorption rate, low reflectivity, and high heat collection efficiency. The two ends of the refrigerant copper tube are vertically connected. For the main pipe, this structure will greatly reduce the pressure loss during operation, and at the same time make the heat of the collector evenly utilized.

The heat collector 2 with glass cover is based on the bare plate heat collector 1, and the upper part of the heat-absorbing core is equipped with an insulating glass cover, the upper part is equipped with a glass cover (insulated tempered glass), and the back is equipped with insulating material. Placed in an aluminum alloy frame. Since the lower part of the heat-absorbing core is equipped with thermal insulation material as a backboard to prevent heat from escaping, the thermal insulation performance is good, and it is more suitable for seasons with cold climate and low solar radiation intensity.

The bare plate heat collector 1 and the heat collector 2 with glass cover are connected to the solenoid valve through the pipeline, and the solenoid valve between the heat collectors is closed/opened according to different external environments, so as to realize the in series and individually.

The present invention adopts the plate heat exchanger 5 as the condenser, which is different from the conventional submerged structure. Plate heat exchanger 5 The plate condenser is formed by stacking a plurality of corrugated plates, and the refrigerant and circulating water perform countercurrent heat exchange in the plate heat exchanger 5 . And the power and flow of the circulating water pump 10 are adjusted by the controller 10 . The required domestic hot water is produced through the heat exchange between tap water and high-temperature and high-pressure refrigerant, which has the advantages of high heat exchange efficiency, stable performance, compact structure, and convenient cleaning. At the same time, the plate heat exchanger 5 is arranged in the hot water storage Outside the box 9, the layout of its site is more flexible and more applicable, and it also avoids damage to the system caused by pipeline corrosion and refrigerant leakage.

Working process of the present invention:

In the present invention, the solar heat collector (bare plate heat collector 1, heat collector 2 with glass cover plate) is also used as a heat pump evaporator, and the refrigerant absorbs heat and evaporates in the heat collector as a solar heat collection medium. After the liquid separator is dried, it enters the compressor, and after being compressed into high-temperature and high-pressure gas, it enters the plate heat exchanger 5 for countercurrent heat exchange with circulating water. The condensed refrigerant enters the thermal expansion valve 7 from the outlet of the plate heat exchanger 5, saving energy. After flowing back to the solar collector (bare plate collector 1, collector 2 with glass cover), complete the refrigerant cycle. At the same time, the tap water in the heat storage tank 9 is pumped out by the circulating water pump 8 and enters the plate heat exchanger 5 to exchange heat with the refrigerant. After being heated, it enters the heat storage tank 9 through the outlet of the plate heat exchanger 5, and the heat storage A temperature sensor 12 is housed in the case 9, and after the water temperature in the heat storage tank 9 reaches the designated requirement, the control system starts and stops.

In the present invention, the operation mode of the heat collector/evaporator (bare plate heat collector 1, heat collector 2 with glass cover) is adjusted according to the external working conditions, which is to consider the influence of external conditions on the system.

In winter, the demand for hot water is the largest, the temperature is the lowest, and the radiation intensity is the lowest. At this time, running the heat collector 2 with a glass cover can effectively protect the heat collected in the heat collector and improve the operating performance of the system.

If the demand for hot water at the end cannot be met at this time, the solenoid valve can be opened to realize the simultaneous operation of two heat collectors (bare plate heat collector 1, heat collector 2 with glass cover).

When the solar radiation intensity is high, operating the bare plate heat collector 1 alone can not only obtain high heat collection efficiency, but also maintain a relatively constant plate temperature and low operating temperature, thereby protecting the compressor. , the heat exchange surface of the bare plate heat collector 1 is in direct contact with the outside air, and the convective heat exchange performance with the air is better, and a certain amount of heat can be obtained from the air as an auxiliary heat source for the system. This operation mode of adjusting the heat collecting area not only ensures that the system can achieve high efficiency under any working conditions, has remarkable energy-saving effect, good applicability throughout the year, and is easy to install and operate, but also ensures that the core component of the system - the compressor The safe operation has a good application prospect.

The usage method of the present invention:

In the present invention, the electromagnetic valve A21 is first opened, tap water enters the hot water storage tank 9, and the water quantity in the hot storage tank 9 is monitored by a liquid level observer. After the hot water storage tank 9 is filled with water, the electromagnetic valve A21 is closed. Open the solenoid valve H28. After the system is started, the tap water in the heat storage tank 9 is pressurized by the circulating water pump 8 and then enters the plate heat exchanger 5 to exchange heat with the refrigerant in a countercurrent manner. The tap water flows into the heat storage tank 9 after being heated by the plate heat exchanger 5 . The temperature sensor 12 is used to monitor the water temperature in the water tank. After the water temperature in the hot water storage tank 9 reaches a specific temperature, the temperature sensor 12 transmits the signal to the controller 10, and the controller 10 controls the closing of the compressor 4 and the circulating water pump 8. At this time, the hot water storage tank 9 is filled with domestic hot water at a specified temperature, which is supplied to the user through the electromagnetic valve B22.

At the same time, in the refrigerant cycle, after the system is started, the controller 10 and the compressor 4 are started at the same time, and the refrigerant liquid enters the bare plate heat collector 1 and the lower part of the heat collector 2 with a glass cover, absorbing heat and evaporating in it After being dried by the gas-liquid separator 3, it enters the compressor 4, and after being compressed into a high-temperature and high-pressure gas in the compressor 4, it enters the plate heat exchanger 5 to exchange heat with water, and after being condensed into a liquid state, enters the thermal expansion valve 7, throttling Then return to the bare plate heat collector 1 and the heat collector 2 with a glass cover to complete the refrigerant side cycle.

The temperature sensor 11 is used to detect the gas temperature of the suction port of the compressor, and is connected to the controller 10. When the gas temperature of the suction port of the compressor 4 is too high or too low, the controller will send an alarm or automatically cut off Compressor 4 power supply to ensure the safety of system operation. The controller 10 can detect the running current of the compressor 4 and the circulating water pump 8 at the same time, and cut off the power supply to protect the system when the current is abnormal.

In summer when the radiation is better and the ambient temperature is higher, the bare plate collector 1 can not only absorb heat from solar radiation, but also has good convective heat transfer performance with the surrounding air, which is more conducive to absorbing heat from the air . At this time, the solenoid valve C23, solenoid valve E25, and solenoid valve G27 are closed, and the solenoid valve D24 and solenoid valve F26 are opened. The refrigerant absorbs heat and evaporates in the bare plate heat collector 1 to meet the needs of water cycle users.

When the ambient temperature drops in winter and the solar radiation is weak, the heat collector 2 with a glass cover will reduce the heat loss between the heat collector and the surrounding environment, effectively ensuring that the collected solar radiation energy is fully utilized. Solenoid valve D24, solenoid valve E25, solenoid valve F26 are closed, solenoid valve C23, solenoid valve G27 are opened, and the refrigerant absorbs heat and evaporates in the heat collector 2 with a glass cover. After the system has been running for a period of time, if the circulating water temperature Still can not meet the demand, close the solenoid valve C23, solenoid valve F26, open the solenoid valve D24, solenoid valve E25, solenoid valve G27, so that the bare plate collector 1 and the collector 2 with the glass cover run at the same time to absorb the external environment heat and improve system performance.

The liquid storage tank 6 is installed on the outlet pipeline of the plate heat exchanger 5. When the heat collecting area changes, it can automatically balance the amount of refrigerant used in the entire refrigerant cycle, reducing the impact of the refrigerant charge on system performance.

Among the present invention, adopt programmable logic controller (Programmable Logic Controller, PLC) except controller 10, compressor 4, electromagnetic valve A21, electromagnetic valve B22, electromagnetic valve C23, electromagnetic valve D24, electromagnetic valve E25, electromagnetic valve F26, electromagnetic valve Valve G27, solenoid valve H28, and circulating water pump 8 are all controlled by PLC programming, and the integrated touch screen visual interface is used for operation. The operation interface is placed indoors, and the above components can be manually adjusted in real time to realize the manual and automatic integrated control of the entire system. , on the basis of ensuring the safe operation of the system, it has many advantages such as convenient operation and beautiful appearance.

The specific embodiments of the present invention have been described above, but the present invention is not limited thereto, and the present invention can have various changes as long as it does not deviate from the purpose of the present invention.

Claims (8)

1. a heat exchanger core that is used for the heat collector of solar heat pump and water heating system is characterized in that, comprising:

House steward, the tubular structure of horizontally set has cold-producing medium in it; And

Band vertically is provided with, forms by cold-producing medium copper pipe and aluminium fin,

Wherein, said cold-producing medium copper pipe and house steward's vertical connection, said aluminium fin be arranged at said cold-producing medium copper pipe around.

2. the bare board formula heat collector of a heat exchanger core as claimed in claim 1 preparation is characterized in that, comprising: heat exchanger core and the anodized coating processed by house steward and band,

Wherein, said house steward is the tubular structure of horizontally set, and cold-producing medium is arranged in it;

Said band vertically is provided with, form by cold-producing medium copper pipe and aluminium fin, said cold-producing medium copper pipe and house steward's vertical connection, said aluminium fin be arranged at said cold-producing medium copper pipe around;

Said strip face coated anode oxide covering.

3. the heat collector that has glass cover-plate of a heat exchanger core preparation as claimed in claim 1 is characterized in that, comprising: by heat exchanger core, the anodized coating that house steward and band are processed, and glass cover-plate, backboard and frame,

Wherein, said house steward is the tubular structure of horizontally set, and cold-producing medium is arranged in it;

Said band vertically is provided with, form by cold-producing medium copper pipe and aluminium fin, said cold-producing medium copper pipe and house steward's vertical connection, said aluminium fin be arranged at said cold-producing medium copper pipe around;

Said strip face coated anode oxide covering;

Said glass cover-plate is arranged at the front of said heat exchanger core;

Said backboard adopts insulation material to process platy structure, is arranged at the back side of said heat exchanger core;

Said frame be coated on said heat exchanger core around.

4. a direct expanding solar heating pump hot-water heating system of processing like each described heat collector of claim 2-3 is characterized in that, comprising:

The cold-producing medium of being made up of at least one heat collector and gas-liquid separator (3), compressor (4), condenser, fluid reservoir (6), heating power expansion valve (7) circulates; And

The water of being made up of condenser, water circulating pump 8 and hot water storage tank 9 circulates.

5. a kind of direct expanding solar heating pump hot-water heating system according to claim 4 is characterized in that, also comprises:

Temperature sensor (11) is used to detect the gas temperature of the air entry of said compressor (4);

Temperature sensor (12) is used to detect the temperature of the water in the said hot water storage tank (9); And

Controller (10) is used to detect the running current of said compressor (4) and said water circulating pump (8).

6. a kind of direct expanding solar heating pump hot-water heating system according to claim 4 is characterized in that:

Wherein, the quantity of said heat collector is two,

Each said heat collector is connected with gas-liquid separator (3) through magnetic valve, and each said heat collector is connected with said heating power expansion valve (7) through magnetic valve, and is in series through magnetic valve between two said heat collectors.

7. a kind of direct expanding solar heating pump hot-water heating system according to claim 6 is characterized in that:

Wherein, Said heat collector comprises: bare board formula heat collector (1) and have the heat collector (2) of glass cover-plate, at least one two ends of bare board formula heat collector (1) and the heat collector that has glass cover-plate (2) are connected with said heating power expansion valve (7) with said gas-liquid separator (3) respectively.

8. a kind of direct expanding solar heating pump hot-water heating system according to claim 4 is characterized in that:

Wherein, said condenser is plate type heat exchanger (5), and said plate type heat exchanger (5) plate-type condenser is formed by a plurality of corrugated cardboard sheet closed assemblies, and said cold-producing medium and said water carry out countercurrent flow in said plate type heat exchanger (5).

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