CN201318831Y - Multi-functional heat pump water heater capable of easily defrosting - Google Patents

Abstract

The utility model relates to a multi-functional heat pump hot water machine which is easy to defrost, which solves the problem that the heat pump with a single wind heat source and a water heat source with a single cycle should not only take into account the combination of cold and heat, but also meet the different needs for heat and frost formation throughout the year. question. The utility model comprises a refrigeration compressor, a finned air-cooled heat exchanger with a fan, and casing heat exchangers A and B; the inlet side of the refrigeration compressor is connected in series with a gas-liquid separator, and the outlet side of the refrigeration compressor is connected in series Four-way valve A, four-way valve B and finned air-cooled heat exchanger with fan, and then composed of one-way valve, liquid reservoir, dry filter, sight glass, three-way pipe and four-way pipe, etc. loop loop. This device realizes a four-discrete circulation system, which can satisfactorily achieve the most sufficient combination of cooling and heating, and can use different heat sources to provide heat to meet demand. The device has four functions of cooling, heating, making domestic hot water and making domestic hot water while cooling. The design process of this device can reasonably and reliably solve the problem of defrosting when frosting occurs during winter operation.

Description

Multifunctional heat pump water heater that is easy to defrost

technical field

The utility model relates to a water heater, specifically a multifunctional heat pump water heater.

Background technique

Heat pumps have obvious energy-saving benefits in providing domestic hot water and heating. A heat pump is a reversely utilized refrigerator, which only utilizes the heat of the condenser in the refrigeration cycle, and the refrigerator only utilizes the cold generated by the evaporator. If the heat discharged by the heat pump in the condenser and the cooling capacity generated by the evaporator can be used at the same time, the heat pump can obtain about double the energy efficiency ratio. However, the demand for cooling capacity and the demand for heat do not match in different seasons throughout the year. In summer, the demand for cooling capacity is large and the demand for heat is low. The situation is reversed in spring and autumn, while only heat is needed in winter. difference. At present, heat pumps with a single wind heat source and a single water heat source with a single cycle are difficult to take into account the combination of cooling and heating, and to meet the different needs for heat throughout the year. On the other hand, as we all know, when the heat pump unit is running in winter, the main problem is frosting; frosting will reduce the performance of the unit and affect the heating capacity. The existence of the frosting problem has seriously affected the promotion and application of heat pumps, an energy-saving technology in the north.

Utility model content

In order to solve the heat pump with single wind heat source and single water heat source with single circulation, it should not only take into account the combination of cooling and heating, but also meet the problem of different needs for heat throughout the year and the problem of frosting, the utility model provides an easy-to-defrost Multifunctional heat pump water heater.

The structural design scheme of the present utility model is as follows:

The multifunctional heat pump hot water machine that is easy to defrost includes a refrigeration compressor 1, a finned air-cooled heat exchanger 20 with a fan, a casing heat exchanger A3, and a casing heat exchanger B4;

The inlet side of the refrigeration compressor 1 is connected with a gas-liquid separator 2 in series, the outlet side of the refrigeration compressor 1 is connected with a four-way valve A22 in series, the second port of the four-way valve A22 is connected with the four-way valve B21, and the four-way valve A22 The third port of the four-way valve A22 is connected to the inlet of the gas-liquid separator 2, and the fourth port of the four-way valve A22 is connected to the inlet of the casing heat exchanger B4;

The second port of the four-way valve B21 is connected to the finned air-cooled heat exchanger 20 with a fan, the third port of the four-way valve B21 is connected to the inlet of the gas-liquid separator 2, and the fourth port of the four-way valve B21 is connected to Inlet of casing heat exchanger A3;

The other end of the finned air-cooled heat exchanger 20 with fan is provided with a three-way pipe, and the second port of the three-way pipe is provided with a one-way valve C19, and the other side of the one-way valve C19 is connected to the liquid reservoir 15 through a pipeline. , a dry filter 14 and a sight glass 12, the third port of the tee pipe is connected to the heating thermal expansion valve 18 and the solenoid valve C17 through a pipeline;

The other end of the sleeve-and-tube heat exchanger B4 is provided with a three-way pipe, and the second port of the three-way pipe is provided with a one-way valve B11. The third port of the tube is connected to the refrigeration thermal expansion valve 9 and the solenoid valve B10 through the pipeline; the inlet side of the casing heat exchanger B4 is arranged with the air-conditioning cold and hot water outlet 6, and the outlet side is arranged with the air-conditioning cold and hot water inlet 7;

The other end of the sleeve-and-tube heat exchanger A3 is provided with a three-way pipe, and the second port of the three-way pipe is provided with a one-way valve A16, and the other side of the one-way valve A16 is connected to the inlet port of the liquid storage device 15 through a pipeline. The third port of the through pipe is connected to the solenoid valve A13 through the pipeline; the other end of the solenoid valve A13 is provided with a four-way pipe, the second port of the four-way pipe is connected to the other port of the sight glass 12, and the third port of the four-way pipe Connect to the other port of the solenoid valve C17, the fourth port of the four-way pipe is connected to the other port of the solenoid valve B10; the casing heat exchanger A3; the domestic hot water outlet 5 is arranged on the inlet side of the casing heat exchanger A3, The domestic hot water inlet 8 is arranged on the outlet side.

The utility model can realize using the air as the heat source and only making air-conditioning cold water, that is, cooling; using the air as the heat source, only making the hot water for the air-conditioning, that is, heating; using the air as the heat source, only making domestic hot water; making domestic heat while cooling Water has four functions; that is, the utility model has multiple functions.

When running in winter, there are two processes that need to be defrosted, one is only the domestic hot water process, and the other is only the air-conditioning hot water process. The defrosting of these two functions is through the use of the high-temperature and high-pressure refrigerant steam exhausted by the refrigeration compressor to directly pass into the frosted fin heat exchange for defrosting. Due to the phase change, it has a high latent heat. The defrosting speed is very fast, and it can also ensure that the defrosting is complete. Is a very effective method of defrosting.

Compared with solar water heaters, the utility model has the following characteristics: ①The energy saving performance is basically the same, and the energy saving effect is better than that of solar water heaters in areas where air-conditioning is commonly used in the south. Use auxiliary electric heating; ②The floor area is small, and the area of solar water heaters is not enough for high-rise buildings; ③The time of water use is flexible, hot water can be produced at any time, and solar water heaters need to be used in the evening, which is passive.

Compared with the single heat pump with both hot water making and cooling functions, the utility model can automatically balance the hot water supply and cold supply, and can independently perform refrigeration when the hot water is satisfied, and can be used when the cold air is satisfied but the hot water is insufficient Hot water is produced alone, and a heat pump with hot water heating and cooling functions is limited by the minimum load. If the cooling capacity is sufficient, hot water cannot be produced, and if the hot water is sufficient, it cannot be refrigerated. Therefore, the heat pump of the utility model can still obtain an appropriate amount of cold supply when hot water is provided after the central air conditioner of the large hotel stops, so that the restaurants and entertainment places of the hotel still have air conditioners.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described by embodiment.

Example:

Referring to Fig. 1, the multifunctional heat pump hot water machine that is easy to defrost includes a refrigeration compressor 1, a finned air-cooled heat exchanger 20 with a fan, a casing heat exchanger A3, and a casing heat exchanger B4;

The inlet side of the refrigeration compressor 1 is connected with a gas-liquid separator 2 in series, the outlet side of the refrigeration compressor 1 is connected with a four-way valve A22 in series, the second port of the four-way valve A22 is connected with the four-way valve B21, and the four-way valve A22 The third port of the four-way valve A22 is connected to the inlet of the gas-liquid separator 2, and the fourth port of the four-way valve A22 is connected to the inlet of the casing heat exchanger B4;

The second port of the four-way valve B21 is connected to the finned air-cooled heat exchanger 20 with a fan, the third port of the four-way valve B21 is connected to the inlet of the gas-liquid separator 2, and the fourth port of the four-way valve B21 is connected to Hot water inlet of casing heat exchanger A3;

The other end of the finned air-cooled heat exchanger 20 with fan is provided with a three-way pipe, and the second port of the three-way pipe is provided with a one-way valve C19, and the other side of the one-way valve C19 is connected to the liquid reservoir 15 through a pipeline. , a dry filter 14 and a sight glass 12, the third port of the tee pipe is connected to the heating thermal expansion valve 18 and the solenoid valve C17 through a pipeline;

The other end of the sleeve-and-tube heat exchanger B4 is provided with a three-way pipe, and the second port of the three-way pipe is provided with a one-way valve B11. The third port of the tube is connected to the refrigeration thermal expansion valve 9 and the solenoid valve B10 through the pipeline; the inlet side of the casing heat exchanger B4 is arranged with the air-conditioning cold and hot water outlet 6, and the outlet side is arranged with the air-conditioning cold and hot water inlet 7;

The other end of the casing heat exchanger A3 is provided with a three-way pipe, and the second port of the three-way pipe is provided with a one-way valve A16, and the other side of the one-way valve A16 is connected to the inlet port of the liquid reservoir 15 through a pipeline, and the three-way The third port of the tube is connected to the solenoid valve A13 through the pipeline; the other end of the solenoid valve A13 is provided with a four-way pipe, the second port of the four-way pipe is connected to the other port of the sight glass 12, and the third port of the four-way pipe is connected to The other port of the solenoid valve C17, the fourth port of the four-way pipe is connected to the other port of the solenoid valve B10; the inlet side of the casing heat exchanger A3 is arranged with the domestic hot water outlet 5, and the outlet side is arranged with the domestic hot water inlet 8 .

When air is used as the heat source and only the cold water of the air conditioner is used (cooling), the system flow is as follows:

Refrigerant side (refrigerant circulation route): refrigeration compressor 1→four-way valve A22→four-way valve B21→finned air-cooled heat exchanger with fan 20→one-way valve C19→accumulator 15→dry filter Device 14→sight mirror 12→solenoid valve B10→refrigeration thermal expansion valve 9→tube heat exchanger B4→four-way valve A22 fourth port→gas-liquid separator 2→refrigeration compressor 1 (during this process, electromagnetic Valve A13 and solenoid valve C17 are closed).

When air is used as the heat source and only hot water for the air conditioner is used (heating), the system flow is as follows:

Refrigerant side (refrigerant circulation route): refrigeration compressor 1→four-way valve A22→tube heat exchanger B4→one-way valve B11→liquid receiver 15→dry filter 14→sight glass 12→solenoid valve C17→heating thermal expansion valve 18→finned air-cooled heat exchanger with fan 20→four-way valve B21→gas-liquid separator 2→refrigeration compressor 1 (during this process, solenoid valve A13 and solenoid valve B10 are closed ).

When air is used as the heat source and only domestic hot water is produced, the system flow is as follows:

Refrigerant side (refrigerant circulation route): refrigeration compressor 1→four-way valve A22→four-way valve B21→tube heat exchanger A3→one-way valve A16→accumulator 15→dry filter 14→sight glass 12→solenoid valve C17→heating thermal expansion valve 18→finned air-cooled heat exchanger with fan 20→four-way valve B21→gas-liquid separator 2→refrigeration compressor 1 (during this process, solenoid valve A13 and Solenoid valve B10 is closed).

When domestic hot water is produced and air-conditioning cold water is produced at the same time, the system flow is as follows:

Refrigerant side (refrigerant circulation route): refrigeration compressor 1→four-way valve A22→four-way valve B21→tube heat exchanger A3→one-way valve A16→accumulator 15→dry filter 14→sight liquid Mirror 12→solenoid valve B10→refrigeration thermal expansion valve 9→tube heat exchanger B4→four-way valve A22→gas-liquid separator 2→refrigeration compressor 1. (During this process, the solenoid valve A13 and the solenoid valve C17 are closed).

The defrosting process in the hot water heating function is as follows:

The circulation route of the high-temperature and high-pressure refrigerant vapor exhausted by the refrigeration compressor: Refrigeration compressor 1 → four-way valve A22 → four-way valve B21 → finned air-cooled heat exchanger with fan 20 → one-way valve C19 → liquid storage Device 15→drying filter 14→sight mirror 12→solenoid valve A13→tube heat exchanger A3→four-way valve B21→gas-liquid separator 2→refrigeration compressor 1 (during this process, solenoid valve C17 and solenoid valve B10 off).

The defrosting process when only the hot water function of the air conditioner is used is as follows:

The circulation route of the high-temperature and high-pressure refrigerant vapor exhausted by the refrigeration compressor: Refrigeration compressor 1 → four-way valve A22 → four-way valve B21 → finned air-cooled heat exchanger with fan 20 → one-way valve C19 → liquid storage Device 15→dry filter 14→sight mirror 12→solenoid valve B10→refrigeration thermal expansion valve 9→tube heat exchanger B4→four-way valve A22→gas-liquid separator 2→refrigeration compressor 1 (this process , solenoid valve C17 and solenoid valve A13 are closed).

The defrosting of these two functions is through the use of the high-temperature and high-pressure refrigerant steam exhausted by the refrigeration compressor to directly pass into the frosted fin heat exchange for defrosting. Due to the phase change, it has a high latent heat. The defrosting speed is very fast, and it can also ensure that the defrosting is complete. It is a very effective defrosting method.

Claims (1)

1, be easy to the multifunctional heat pump water heating machine that defrosts, comprise finned air cooling heat exchanger (20) and double pipe heat exchanger A (3), the double pipe heat exchanger B (4) of refrigeration compressor (1), band blower fan, it is characterized in that:

The inlet side of described refrigeration compressor (1) gas-liquid separator (2) of connecting, the outlet side of refrigeration compressor (1) the cross valve A (22) that connecting, second port of cross valve A (22) is being communicated with cross valve B (21), the 3rd port of cross valve A (22) is being communicated with the import of gas-liquid separator (2), and the 4th port of cross valve A (22) is being communicated with the import of double pipe heat exchanger B (4);

Second port of cross valve B (21) is being communicated with the finned air cooling heat exchanger (20) with blower fan, and the 3rd port of cross valve B (21) is being communicated with the import of gas-liquid separator (2), and the 4th port of cross valve B (21) is communicated with the import of double pipe heat exchanger A (3);

The other end of the finned air cooling heat exchanger (20) of band blower fan is provided with three-way pipe, second port of three-way pipe is provided with check valve C (19), the opposite side of check valve C (19) is being communicated with reservoir (15), device for drying and filtering (14) and liquid-sighting glass (12) by pipeline, and the 3rd port of three-way pipe is being communicated with by pipeline and heats heating power expansion valve (18) and magnetic valve C (17);

The other end of double pipe heat exchanger B (4) is provided with three-way pipe, second port of three-way pipe is provided with check valve B (11), the opposite side of check valve B (11) is being communicated with reservoir (15) entrance point by pipeline, and the 3rd port of three-way pipe is being communicated with refrigeration heating power expansion valve (9) and magnetic valve B (10) by pipeline; The inlet side of double pipe heat exchanger B (4) is arranged air conditioner cold-heat water out (6), and its outlet side is arranged air conditioner cold-heat water inlet (7);

The other end of double pipe heat exchanger A (3) is provided with three-way pipe, second port of three-way pipe is provided with check valve A (16), the opposite side of check valve A (16) is being communicated with reservoir (15) entrance point by pipeline, and the 3rd port of three-way pipe is being communicated with magnetic valve A (13) by pipeline; The other end of magnetic valve A (13) is provided with four-way pipe, second port of four-way pipe connects the another port of liquid-sighting glass (12), the 3rd port of four-way pipe connects the another port of magnetic valve C (17), and the 4th port of four-way pipe connects the another port of magnetic valve B (10); Double pipe heat exchanger A (3); The inlet side of double pipe heat exchanger A (3) is arranged domestic hot-water's outlet (5), and its outlet side is arranged domestic hot-water's import (8).

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