CN110822529A

CN110822529A - Secondary reverse phase type air source heat pump heating device and application technology

Info

Publication number: CN110822529A
Application number: CN201810892957.XA
Authority: CN
Inventors: 孟凡正; 孟磊; 房小军
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-08-07
Filing date: 2018-08-07
Publication date: 2020-02-21

Abstract

The invention relates to a secondary reverse phase type air source heat pump heating device and an application technology thereof, belonging to the technical field of manual heating. The combination of secondary condensing continuous heat exchange and alternate reverse phase type low-temperature evaporation heat exchangers is mainly adopted, high-temperature heating is realized through the secondary condensing heat exchange, 2 groups of low-temperature evaporation heat exchangers are alternately used by utilizing the reverse phase type, and the continuous heating effect of uninterrupted waste heat defrosting and uninterrupted low-temperature evaporation heat exchange is achieved. The problem that continuous heating operation cannot be maintained due to frequent defrosting and intermittent heating in cold and high-humidity weather because the back flushing type hydrothermal defrosting, heating and defrosting are alternately carried out in the air source heat pump device is thoroughly solved. The invention realizes the uninterrupted heating of the large-scale air source heat pump, has the characteristics of high heating temperature (more than 60-80 ℃), low adaptive air temperature (below-30 ℃), high energy-saving efficiency, large installed capacity and good heating effect, is widely applied to replacing boiler heating, industrial heating and the like, and is a good new energy source for thermal replacement.

Description

Secondary reverse phase type air source heat pump heating device and application technology

Technical Field

A secondary reverse phase air source heat pump heating device and application technique; the air source heat pump heating device is based on the technical process of a secondary condensation type heat pump cooling and heating device (the patent of the inventor), a split double-effect reversible phase low-temperature heat exchanger mode is adopted, so that the large-scale air source heat pump heating device can realize continuous and uninterrupted operation of a low-temperature heat exchange system, the air source heat pump heating device can continuously heat and heat in a low-temperature or ultralow-temperature environment, the influence of serious frosting of the low-temperature heat exchanger caused by a low-temperature and high-humidity environment is avoided, and the technical problem that the heating effect is influenced due to discontinuous defrosting operation is. The heat pump can be widely applied to the large air source heat pump for stable and reliable heating in winter, is particularly suitable for heating buildings in alpine regions, is also suitable for industrial heating and other purposes, and achieves the purposes of stability, high efficiency and energy conservation.

The technology of the invention solves the difficult problem that the defrosting of the traditional heat pump cooling and heating equipment influences the heat supply, thoroughly solves the adverse effect of the reverse flow back flushing type heat defrosting on the continuous heat supply heating effect, ensures that the large heat pump unit is not influenced by the defrosting in the heating of high and cold days, ensures the uninterrupted sustainable operation, the non-intermittent defrosting and the stable heat supply of the large heat pump heating equipment, is widely suitable for the building heating of residential districts, ecological agriculture, livestock breeding, food processing and industrial heating, replaces a boiler, and can realize the high-efficiency and energy-saving operation effect

Background

The frosting problem of the outdoor heat exchanger in winter is a main factor influencing the non-heating effect no matter a small unit or a large unit. The traditional defrosting mode has two types: one is electric heating defrosting, but refrigerant hot liquid backflushing defrosting, which can not achieve the technical purpose and requirement that the heat pump unit can continuously and uninterruptedly operate in any mode, in particular to a large-scale air source heat pump heating device.

The traditional heat pump units are difficult to adapt to stable heating operation in cold winter and at lower temperature, and some heat pump units need to adopt a large amount of electric auxiliary heating in winter; some heat pump systems adopt a refrigerant hot liquid reverse charging type defrosting method (a thermal defrosting method), but the effect is not ideal.

In order to solve the problems of effective defrosting of heat pump heating equipment and improvement of heating efficiency in a low-temperature environment for many years, refrigeration and heat pump air-conditioning professionals make great efforts, spend a great deal of time and energy, and most of the prior art adopt electric auxiliary heating, electric defrosting and intermittent back flushing defrosting. The large (single machine heating quantity) full heat pump type (manual heating) heating device can not be put on the market in time.

The high-temperature refrigerant countercurrent backflushing type hot defrosting mode adopted by the traditional technology completely stops the heating operation effect when defrosting is carried out, and the refrigerant is turned to the countercurrent backflushing defrosting state from the heating state, so that more cold energy (refrigerating effect) can be generated in a heat generating system (condenser) at the moment, and the heat supply effect is directly influenced. But this is also the hot liquid (high pressure, high temperature refrigerant) defrost technology that has by far the most traditional technical significance.

Disclosure of Invention

1. The invention belongs to the technical field of manual heating devices, and particularly relates to an external reverse phase type heat pump heating device.

2. The device adopts a secondary condensation type configuration structure, a split type double-effect reversible phase low-temperature heat exchanger and a technical process; wherein the device mainly comprises: (1) the compressor, (2) the first heat exchanger, (3) the second heat exchanger (double effect), (4) the third heat exchanger (double effect), (Z) the phase-changing device, (W) the throttling device and the pipeline form a closed loop, and the fan is used for low-temperature heat exchange.

3. The system consists of three (or more) heat exchangers, wherein a first heat exchanger (2) produces a high-temperature heat source (hot water or hot air), and a second heat exchanger (3) and a third heat exchanger (4) are an evaporator (low-temperature heat exchanger) and a waste heat recoverer compensator mutually;

4. the first heat exchanger (2) is generally a shell-and-tube heat exchanger, and the second heat exchanger (3) and the third heat exchanger (4) are air-cooled heat exchangers (low-temperature heat exchange is carried out by using a fan).

5. The second heat exchanger and the third heat exchanger are mutually converted by utilizing the reversing device (Z), so that the effects of alternate use, uninterrupted heat exchange, non-intermittent defrosting and continuous heat supply operation are achieved;

6. the double-effect reverse phase function (low-temperature evaporation heat exchange and waste heat compensation) of the double-system low-temperature heat exchanger is realized by utilizing the function of the throttling device (W), and the heating operation effect of uninterrupted defrosting and uninterrupted heat exchange is achieved by means of the function of the fan.

7. The two low-temperature heat exchangers (3) and (4) are evaporators which are mutually, and the working processes can be mutually converted (reversed phase) and used or used singly (phased); the conversion of the reverse phase or phasing functional mode is realized by the reversing device.

8. The special compressor adopted by the device mainly comprises a screw compressor, and other types of compressors (centrifugal type, vortex type or reciprocating type and the like) can also be adopted, and are indispensable components.

10. The device is suitable for running under the working condition of low temperature, defrosting is not influenced and normal heating and heating are not interrupted, and a good effect of stable and continuous heating and running can be realized.

Heating working principle and process:

(for example, FIG. 1 is the basic principle flow, FIG. 2 is the working medium circulation flow when in use)

1. The heat exchanger (4) is used for heating operation of the evaporator:

flow direction of the working medium: (1) - (K1) - (2) - (Z) - (3) - (W) - (4) - (Z) - (K2) - (1), hot water is output from (5) and (6); the heat exchanger (4) is used as an evaporator, and the heat exchanger (3) is used as a waste heat compensator (simultaneously self-heating defrosting); under the cooperation of the phase-changing device and the bidirectional throttling device, uninterrupted heating, non-intermittent defrosting and high-efficiency operation are realized. (see FIG. 2)

2. The heat exchanger (3) is used for heating operation of the evaporator:

flow direction of the working medium: (1) - (K1) - (2) - (Z) - (4) - (W) - (3) - (Z) - (K2) - (1), hot water is output from (5) and (6); the heat exchanger (4) is used as an evaporator, and the heat exchanger (4) is used as a waste heat compensator (simultaneously self-heating defrosting); under the cooperation of the phase-changing device and the bidirectional throttling device, uninterrupted heating, non-intermittent defrosting and high-efficiency operation are realized. (see FIG. 2)

3. During heat supply: the hot water is output from the 5 and 6 ends and is sent to a heat dissipation device (such as a floor heating device, a fan or a radiator) at the tail end of a user through a pipeline or an air duct.

Claims

1. The invention relates to a device and a technology for manual heating, in particular to a heat pump heating device adopting a secondary condensation technology and a split-type low-temperature (evaporation) heat exchanger.

2. The device adopts a secondary condensation type configuration structure, a split type double-effect reversible phase low-temperature heat exchanger and a technical process; wherein the device mainly comprises: (1) the system comprises a compressor, a first heat exchanger, a second heat exchanger (double effect) (3), a third heat exchanger (double effect) (4), a phase-changing device (Z), a throttling device (W) and a closed pipeline.

3. Three (or more) heat exchangers are respectively arranged, wherein a first heat exchanger (2) produces high-temperature heat source (hot water or hot air), and a second heat exchanger (3) and a third heat exchanger (4) are an evaporator (low-temperature heat exchanger) and a waste heat recovery compensator.

4. The first heat exchanger (2) is generally a shell-and-tube heat exchanger, and the second heat exchanger (3) and the third heat exchanger (4) are generally air-cooled heat exchangers (adapted to air or wind air).

5. The second heat exchanger and the third heat exchanger are mutually converted by the reversing device (Z), so that the effects of alternate use, uninterrupted heat exchange, non-intermittent defrosting and continuous heat supply operation are achieved.

6. The double-effect reverse phase function (low-temperature evaporation heat exchange and waste heat compensation) of the double-system low-temperature heat exchanger is realized by utilizing the function of the throttling device (W), and the heating operation effect of uninterrupted defrosting and uninterrupted heat exchange is achieved.

8. The device consists of three (or more) heat exchangers, wherein the high-temperature heat exchanger can also be called a condenser, the low-temperature heat exchanger can also be called an evaporator, and the heat exchangers are all heat source exchangers taking fluid as carriers.

9. The special compressor adopted by the device mainly comprises a screw compressor, and other types of compressors (centrifugal type, vortex type or reciprocating type and the like) can also be adopted, and are indispensable components.

10. The device comprises 6 main components (a compressor, a high-temperature heat exchanger, a low-temperature heat exchanger (double system), a phase-changing device and a throttling device) which are combined with a pipeline to form a closed working medium circulation loop, defrosting does not influence and uninterruptedly heats and supplies heat under the coordination of other auxiliary systems, and can realize a good effect of stable and continuous heating operation.