CN201106955Y - Multifunctional multiple source heat energy unit - Google Patents

Abstract

The utility model discloses a multi-functional multiple source heat energy unit, including the compressor, first shell and tube heat exchanger, finned heat exchanger, filter, refrigeration expansion valve, check valve, second shell and tube heat exchanger that connect gradually with the compressor, vapour and liquid separator still includes the cross valve with first shell and tube heat exchanger, finned heat exchanger, second shell and tube heat exchanger, vapour and liquid separator connects, still be equipped with the regulation branch road of heating that comprises filter, heating expansion valve, check valve on the return circuit that finned heat exchanger is connected with second shell and tube heat exchanger, this regulation branch road of heating and the refrigeration regulation branch road parallel connection who comprises filter, refrigeration expansion valve, check valve. The central air-conditioning system integrates the functions of refrigeration, heating, refrigeration heat recovery, heating heat recovery, total heat and the like, and can utilize the defrosting water pump to defrost when the central air-conditioning system operates, so that the heat utilization efficiency of the unit is improved, the energy is saved, the environment is protected, and the central air-conditioning system is convenient to use.

Description

Multifunctional composite source heat energy unit

technical field

The utility model relates to a central air-conditioning system, more specifically, relates to a system that integrates functions such as refrigeration, heating, heating, refrigeration heat recovery, heating heat recovery, and full heat, and can be operated in the central air-conditioning system. It is a multi-functional composite source thermal energy unit that defrosts at any time.

Background technique

The functions of the existing central air-conditioning system are relatively single, and the functions of heating, heating, cooling heat recovery, heating heat recovery, and total heating are not integrated into one, which is not conducive to the full utilization of the central air-conditioning system, resulting in energy waste and is not conducive to energy conservation. ,protect environment. In addition, when defrosting the traditional central air-conditioning system, it needs to be shut down first, and then use the reverse cycle to defrost. The defrosting operation cannot be performed while the central air-conditioning system is running, which brings inconvenience to users.

Utility model content

The purpose of this utility model is to overcome the above-mentioned defects in the prior art, and provide a system that integrates the functions of refrigeration, heating, heating, cooling heat recovery, heating heat recovery, and full heat, and can be used when the central air-conditioning system is running. A multifunctional composite source heat energy unit for defrosting.

In order to achieve the above object, the technical solution provided by the utility model is as follows: construct a multifunctional composite source thermal energy unit, including a compressor, a first shell-and-tube heat exchanger, a finned heat exchanger, filter, refrigeration expansion valve, one-way valve, second shell-and-tube heat exchanger, vapor-liquid separator, and the first shell-and-tube heat exchanger, finned heat exchanger, second shell-and-tube heat exchanger Heater, the four-way valve connected to the gas-liquid separator, and the circuit connecting the finned heat exchanger and the second shell-and-tube heat exchanger is also equipped with a filter, a heating expansion valve, and a one-way valve. The heating regulating branch circuit is connected in parallel with the cooling regulating branch circuit composed of a filter, a refrigeration expansion valve and a one-way valve, and the first shell-and-tube heat exchanger is connected with a domestic water pump , the second shell-and-tube heat exchanger is connected with the air-conditioning water pump.

The finned heat exchanger is also connected in series with a defrosting water pump, one end of the defrosting water pump is connected to the outlet pipe of the first shell-and-tube heat exchanger, and the other end is connected to the water inlet pipe of the finned heat exchanger. Connection, the water outlet pipe of the fin heat exchanger is connected with the water inlet pipe of the first shell and tube heat exchanger.

The beneficial effect of the multi-functional compound source thermal energy unit described in the utility model is: by integrating the functions of refrigeration, heating, heating, refrigeration heat recovery, heating heat recovery, and full heat, it can be used when the central air conditioning system is running. The defrosting water pump performs defrosting, which improves the heat utilization efficiency of the unit, is beneficial to energy saving, environmental protection, and is easy to use.

The following is a further description of the multifunctional composite source thermal energy unit described in the present invention in conjunction with the accompanying drawings and examples:

Description of drawings

Fig. 1 is a schematic diagram of the system structure under the cooling mode of the multifunctional composite source thermal energy unit described in the utility model;

Fig. 2 is a schematic diagram of the system structure of the heating sub-mode of the heating mode of the multi-functional composite source thermal energy unit described in the present invention;

Fig. 3 is a schematic diagram of the system structure of the full heat sub-mode of the heating mode of the multi-functional composite source thermal energy unit of the present invention.

Detailed ways

Explanation of reference signs:

1. Compressor; 2. First shell and tube heat exchanger; 3. Finned heat exchanger; 4. Filter; 5. Refrigeration expansion valve; 6. Check valve; 7. Second shell and tube heat exchanger Heater; 8. Vapor-liquid separator; 9. Four-way valve; 10. Filter; 11. Heating expansion valve; 12. One-way valve; 13. Defrost pump; 14. Domestic water pump; 15. Air conditioning pump; 16. Fan.

The following are the best embodiments of the multi-functional composite source thermal energy unit described in the utility model, which does not limit the scope of protection of the utility model.

Referring to Fig. 1, a multifunctional compound source thermal energy unit is provided, including a compressor 1, a first shell-and-tube heat exchanger 2, a finned heat exchanger 3, a filter 4, and a refrigeration expansion unit sequentially connected to the compressor 1. Valve 5, one-way valve 6, second shell-and-tube heat exchanger 7, vapor-liquid separator 8, and the first shell-and-tube heat exchanger 2, finned heat exchanger 3, second shell-and-tube heat exchanger The heat exchanger 7, the four-way valve 9 connected to the gas-liquid separator 8, the circuit connecting the finned heat exchanger 3 and the second shell-and-tube heat exchanger 7 is also provided with a filter 10, a system The heating regulation branch composed of the thermal expansion valve 11 and the one-way valve 12 is connected in parallel with the cooling regulation branch composed of the filter 4, the cooling expansion valve 5 and the one-way valve 6. The first The shell-and-tube heat exchanger 2 is connected with the domestic water pump 14 , and the second shell-and-tube heat exchanger 7 is connected with the air-conditioning water pump 15 .

In cooling mode, the four-way valve 9 is not opened, and the fan 16 is controlled by the refrigerant outlet temperature of the first shell-and-tube heat exchanger 2 or the return water temperature of the first shell-and-tube heat exchanger 2 . When the outlet temperature of the refrigerant of the first shell-and-tube heat exchanger 2 or the return water temperature of the first shell-and-tube heat exchanger 2 is higher than the set temperature, the fan 16 starts. In the cooling mode, the air-conditioning water pump 15 and the domestic water pump 14 operate.

The high-temperature and high-pressure refrigerant discharged from the compressor 1 flows into the first shell-and-tube heat exchanger 2, and the refrigerant exchanges heat with domestic water in the first shell-and-tube heat exchanger 2. The temperature of the refrigerant decreases and the temperature of domestic water increases. The refrigerant flows into the finned heat exchanger 3 through the four-way valve 9, and exchanges heat with the air in the finned heat exchanger 3. The temperature of the refrigerant continues to decrease, and the refrigerant flows in through the filter 4, the refrigeration expansion valve 5, and the one-way valve 6. In the second shell-and-tube heat exchanger 7, the refrigerant evaporates and absorbs heat in the second shell-and-tube heat exchanger 7, the temperature of the air-conditioning water decreases, and the air-conditioning water pump 15 sends low-temperature cold water to the indoor terminal equipment to achieve the cooling effect. The refrigerant then flows into the gas-liquid separator 8 through the four-way valve 9, and finally flows into the compressor 1. Through this cycle, the refrigeration effect is realized continuously.

The finned heat exchanger 3 is also connected in series with a defrosting water pump 13, one end of the defrosting water pump 13 is connected to the outlet pipe of the first shell-and-tube heat exchanger 2, and the other end is connected to the finned heat exchanger. The water inlet pipe of 3 is connected, the water outlet pipe of the fin heat exchanger 3 is connected with the water inlet pipe of the first shell and tube heat exchanger 2, when the fin heat exchanger 3 frosts in the heating or full heating mode , the defrosting water pump 13 is turned on, and part of the high-temperature domestic water diverted flows through the finned heat exchanger 3 to defrost the finned heat exchanger 3. When the defrosting ends, the defrosting water pump 13 is turned off.

The heating mode includes two sub-modes of full heat and heating, and the switching between the two modes is realized by an external selection switch. In the heating mode, the fan 16 starts when the four-way valve 9 is opened, and is not controlled by the temperature controller.

Referring to FIG. 2 , in the heating sub-mode, the air-conditioning water pump 15 is running, and the domestic water pump 14 is running. The control system detects the water flow switch of the air-conditioning water and controls the temperature of the air-conditioning water.

When the ambient temperature is less than or equal to 5°C and the water temperature of the air conditioner is less than or equal to the set water temperature -6°C, the electric heater starts;

When the ambient temperature > 5°C or the water temperature of the air conditioner > the set water temperature -2°C, the electric heater is turned off; in the heating mode, the high-temperature and high-pressure refrigerant discharged from the compressor 1 flows into the first shell-and-tube heat exchanger 2. The first shell-and-tube heat exchanger 2 exchanges heat with the domestic water, the temperature of the refrigerant decreases, and the temperature of the domestic water rises, realizing heat recovery for heating. The refrigerant flows into the second shell-and-tube heat exchanger 7 through the four-way valve 9, and The second shell-and-tube heat exchanger 7 exchanges heat with the air-conditioning water, and the temperature of the air-conditioning water rises, and then the high-temperature hot water is sent to the indoor terminal equipment by the air-conditioning water pump 15 to achieve the heating effect. The refrigerant passes through the filter 10 and heats up to expand. Valve 11 and one-way valve 12 flow into the finned heat exchanger 3 for heat exchange, and then flow into the compressor 1 through the four-way valve 9 and the gas-liquid separator 8, and so on. Circulation, so as to achieve the heating effect.

Referring to Fig. 3, in the full heat sub-mode, the air-conditioning water pump 15 is turned off, the domestic water pump 14 is running, and the high-temperature and high-pressure refrigerant discharged from the compressor 1 flows into the first shell-and-tube heat exchanger 2, where it Heater 2 exchanges heat with domestic water, the temperature of the refrigerant decreases, and the temperature of domestic water increases; the refrigerant flows into the second shell-and-tube heat exchanger 7 through the four-way valve 9, because the air-conditioning water pump 15 is closed, and the refrigerant flows into the second shell-and-tube heat exchanger 7. In the heat exchanger 7, there is very little heat exchange with the air-conditioning water, and a large amount of heat energy is transferred to the domestic water in the first shell-and-tube heat exchanger 2, achieving a full heat effect. Then the refrigerant flows into the finned heat exchanger 3 through the filter 10, the heating expansion valve 11 and the one-way valve 12. After heat exchange in the finned heat exchanger 3, the refrigerant flows through the four-way valve 9 and the gas-liquid separator. 8 into the compressor 1, so that the cycle goes round and round, so as to achieve the purpose of full heat.

Claims (2)

1, a kind of multi-functional multiple source heat energy unit, comprise compressor (1), first shell and tube exchanger (2) that is connected successively with compressor (1), finned heat exchanger (3), filter (4), refrigeration expansion valve (5), check valve (6), second shell and tube exchanger (7), vapour liquid separator (8), it is characterized in that, also comprise and first shell and tube exchanger (2), finned heat exchanger (3), second shell and tube exchanger (7), the cross valve (9) that vapour liquid separator (8) connects, also be provided with by filter (10) on described finned heat exchanger (3) and the loop that second shell and tube exchanger (7) is connected, heat expansion valve (11), check valve (12) constitutes heats the adjusting branch road, this heat regulate branch road with by filter (4), refrigeration expansion valve (5), the refrigeration that check valve (6) constitutes is regulated branch road and is connected in parallel, described first shell and tube exchanger (2) is connected with domestic water water pump (14), and second shell and tube exchanger (7) is connected with air-conditioning water pump (15).

2, multi-functional multiple source heat energy unit according to claim 1, it is characterized in that, described finned heat exchanger (3) also is connected in series with defrosting water pump (13), one end of this defrosting water pump (13) is connected with the outlet conduit of first shell and tube exchanger (2), its other end is connected with the inlet channel of finned heat exchanger (3), and the outlet conduit of finned heat exchanger (3) is connected with the inlet channel of first shell and tube exchanger (2).

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