CN201935475U - An air-cooled chiller with partial heat recovery - Google Patents

Abstract

The utility model provides a but partial heat recovery type forced air cooling water set, including the compressor, first cross valve, the second cross valve, air side fin formula heat exchanger, throttling arrangement, first check valve, the second check valve, the third check valve, the fourth check valve, air conditioner side heat exchanger, the reservoir, vapour and liquid separator, partial heat recovery heat exchanger and holding water box, wherein, partial heat recovery heat exchanger can set up in holding water box, can also set up outside holding water box, be connected the water inlet of partial heat recovery heat exchanger with holding water box's delivery port through hot water circulating water pump, be connected the delivery port of partial heat recovery heat exchanger with holding water box's water inlet. Compared with the prior art, the utility model discloses can guarantee thermal effective recovery and recycle, not only improve the thermal efficiency, strengthen air conditioning system's hot water supply ability, protect the environment to avoid thermal pollution, environmental protection and energy saving moreover again, still have simple structure, the lower characteristics of cost simultaneously.

Description

An air-cooled chiller with partial heat recovery

technical field

The utility model relates to the technical field of air conditioning, in particular to an air-cooled chiller capable of partial heat recovery.

Background technique

As an alternative means to solve heating problems, heat pumps have great advantages from both technical and economical points of view. Heat pump technology is a way to convert low-grade heat, such as air, water (including: surface water, groundwater, etc.), solar energy, soil, waste heat, etc., into high-grade heat, such as heating heat. Its working principle is: when the heat pump is running, the evaporator absorbs heat from the heat source (heat collection), and provides heat to the heat-using object.

At present, with the development of social economy, more and more air-cooled heat pump units are adopted by people. In summer, when the air-cooled heat pump unit is running, it will emit a large amount of condensation heat to the environment through the air-side fin heat exchanger. The discharge of condensation heat will not only increase the temperature of the city, but also cause The center forms a "heat island" effect. If this part of the energy can be recovered and utilized, it will not only save energy, reduce carbon dioxide emissions, but also protect the environment.

Therefore, in order to solve the above problems, it is urgent to provide an air-cooled chiller with partial heat recovery that can not only ensure the effective recovery and reuse of heat, but also protect the environment from heat pollution, environmental protection and energy saving, and has a simple structure and low cost. .

Utility model content

The purpose of the utility model is to avoid the deficiencies in the prior art and to provide a kind of movable part that can not only ensure the effective recovery and reuse of heat, but also protect the environment from heat pollution, environmental protection and energy saving, and at the same time, has a simple structure and low cost. Heat recovery type air-cooled chiller.

The purpose of this utility model is achieved through the following technical solutions:

On the one hand, the utility model provides an air-cooled chiller with partial heat recovery, including a compressor, a first four-way valve, a second four-way valve, an air-side finned heat exchanger, a throttling device, The first one-way valve, the second one-way valve, the third one-way valve, the fourth one-way valve, air-conditioning side heat exchanger, liquid receiver, gas-liquid separator, partial heat recovery heat exchanger and heat preservation water tank; The part of the heat recovery heat exchanger is arranged in the heat preservation water tank;

When neither the first four-way valve nor the second four-way valve is energized, the discharge end of the compressor is connected to the ports D1 and C1 of the first four-way valve, the first one-way valve, D2 and C2 ports of the second four-way valve, the air-side finned heat exchanger, the throttling device, the second one-way valve, the air-conditioning side heat exchanger, the second The E2 and S2 ports of the four-way valve, the gas-liquid separator, and the suction end of the compressor are sequentially connected;

When the second four-way valve is energized and the first four-way valve is not energized, the discharge end of the compressor is connected to the D1 and C1 ports of the first four-way valve, the first one-way valve, The D2 and E2 ports of the second four-way valve, the air-conditioning side heat exchanger, the liquid reservoir, the third one-way valve, the throttling device, and the air-side finned heat exchanger The C2 and S2 ports of the device, the second four-way valve, the gas-liquid separator, and the suction end of the compressor are connected in sequence;

When the first four-way valve is energized and the second four-way valve is not energized, the discharge end of the compressor is connected to the D1 and E1 ports of the first four-way valve and the partial heat recovery heat exchanger , the fourth one-way valve, D2 and C2 ports of the second four-way valve, the air-side finned heat exchanger, the throttling device, the second one-way valve, the air conditioner The side heat exchanger, the E2 and S2 ports of the second four-way valve, the gas-liquid separator, and the suction end of the compressor are sequentially connected;

When both the first four-way valve and the second four-way valve are energized, the discharge end of the compressor is connected to the ports D1 and E1 of the first four-way valve, the partial heat recovery heat exchanger, The fourth one-way valve, D2 and E2 ports of the second four-way valve, the air-conditioning side heat exchanger, the liquid reservoir, the third one-way valve, the throttling device, the The air-side finned heat exchanger, the C2 and S2 ports of the second four-way valve, the gas-liquid separator, and the suction end of the compressor are connected in sequence.

Wherein, the throttling device is a capillary tube, a thermal expansion valve or an electronic expansion valve.

Wherein, a fan is provided on one side of the air-side finned heat exchanger.

On the other hand, the utility model also provides an air-cooled chiller with partial heat recovery, including a compressor, a first four-way valve, a second four-way valve, an air-side finned heat exchanger, a throttling Device, first one-way valve, second one-way valve, third one-way valve, fourth one-way valve, air conditioner side heat exchanger, liquid receiver, gas-liquid separator, partial heat recovery heat exchanger, hot water Circulating water pump and heat preservation water tank; the water inlet of the said partial heat recovery heat exchanger is connected with the water outlet of the heat preservation water tank through the hot water circulation pump, and the water outlet of the partial heat recovery heat exchanger is connected with the heat preservation water The water inlet of the water tank is connected;

When neither the first four-way valve nor the second four-way valve is energized, the discharge end of the compressor is connected to the ports D1 and C1 of the first four-way valve, the first one-way valve, D2 and C2 ports of the second four-way valve, the air-side finned heat exchanger, the throttling device, the second one-way valve, the air-conditioning side heat exchanger, the second The E2 and S2 ports of the four-way valve, the gas-liquid separator, and the suction end of the compressor are sequentially connected;

When the second four-way valve is energized and the first four-way valve is not energized, the discharge end of the compressor is connected to the D1 and C1 ports of the first four-way valve, the first one-way valve, The D2 and E2 ports of the second four-way valve, the air-conditioning side heat exchanger, the liquid reservoir, the third one-way valve, the throttling device, and the air-side finned heat exchanger The C2 and S2 ports of the device, the second four-way valve, the gas-liquid separator, and the suction end of the compressor are connected in sequence;

When the first four-way valve is energized and the second four-way valve is not energized, the discharge end of the compressor is connected to the D1 and E1 ports of the first four-way valve and the partial heat recovery heat exchanger , the fourth one-way valve, D2 and C2 ports of the second four-way valve, the air-side finned heat exchanger, the throttling device, the second one-way valve, the air conditioner The side heat exchanger, the E2 and S2 ports of the second four-way valve, the gas-liquid separator, and the suction end of the compressor are sequentially connected;

When both the first four-way valve and the second four-way valve are energized, the discharge end of the compressor is connected to the ports D1 and E1 of the first four-way valve, the partial heat recovery heat exchanger, The fourth one-way valve, D2 and E2 ports of the second four-way valve, the air-conditioning side heat exchanger, the liquid reservoir, the third one-way valve, the throttling device, the The air-side finned heat exchanger, the C2 and S2 ports of the second four-way valve, the gas-liquid separator, and the suction end of the compressor are connected in sequence.

Wherein, the throttling device is a capillary tube, a thermal expansion valve or an electronic expansion valve.

Wherein, a fan is provided on one side of the air-side finned heat exchanger.

Beneficial effects of the utility model: the partial heat recovery type air-cooled chiller includes a compressor, a first four-way valve, a second four-way valve, an air-side finned heat exchanger, a throttling device, a first One-way valve, second one-way valve, third one-way valve, fourth one-way valve, air conditioner side heat exchanger, liquid receiver, gas-liquid separator, partial heat recovery heat exchanger and heat preservation water tank. Among them, part of the heat recovery heat exchanger can be installed in the thermal insulation water tank, and can also be installed outside the thermal insulation water tank. The water outlet of the recovery heat exchanger is connected with the water inlet of the heat preservation water tank. Compared with the prior art, the utility model can ensure the effective recovery and reuse of heat, not only improves the thermal efficiency, enhances the hot water supply capacity of the air-conditioning system, but also protects the environment from heat pollution, environmental protection and energy saving. The new type can realize partial heat recovery by only using two four-way valves and several one-way valves, so it also has the characteristics of simple structure and low cost.

Description of drawings

Utilize accompanying drawing to further illustrate the utility model, but the embodiment in the accompanying drawing does not constitute any restriction to the present utility model, for those of ordinary skill in the art, under the premise of not paying creative work, also can obtain according to following accompanying drawing Additional drawings.

Fig. 1 is a structural schematic diagram of Embodiment 1 of an air-cooled water chiller capable of partial heat recovery of the utility model.

Fig. 2 is a schematic structural view of Embodiment 2 of an air-cooled water chiller capable of partial heat recovery of the utility model.

In Figure 1 and Figure 2, it includes: 1—air conditioner side heat exchanger, 2—second one-way valve, 3—accumulator, 4—third one-way valve, 5—throttling device, 6—the fourth one-way valve, 7—the second four-way valve, 8—air side fin heat exchanger, 9—the first one-way valve, 10—the first four-way valve, 11— —Compressor, 12—Gas-liquid separator, 13—Partial heat recovery heat exchanger, 14—Hot water circulating pump, 15—Insulation water tank.

Detailed ways

The utility model is further described in conjunction with the following examples.

Example 1

One of the specific implementations of a partial heat recovery type air-cooled chiller of the present utility model, as shown in Figure 1, includes a compressor 11, a first four-way valve 10, a second four-way valve 7, an air side Finned heat exchanger 8, throttling device 5, first one-way valve 9, second one-way valve 2, third one-way valve 4, fourth one-way valve 6, air conditioner side heat exchanger 1, liquid storage device 3, gas-liquid separator 12, partial heat recovery heat exchanger 13 and heat preservation water tank 15; The utility model can ensure the effective recovery and reuse of heat, not only improves the thermal efficiency, enhances the hot water supply capacity of the air conditioning system, but also protects the environment from heat pollution, environmental protection and energy saving, and because the utility model only uses two four-way One valve and four one-way valves can realize partial heat recovery, therefore, it also has the characteristics of simple structure and low cost.

When the first four-way valve 10 and the second four-way valve 7 are not energized, the discharge end of the compressor 11 is connected to the D1 and C1 ports of the first four-way valve 10, the first one-way valve 9, and the second four-way valve. D2, C2 ports of 7, air-side finned heat exchanger 8, throttling device 5, second one-way valve 2, air-conditioning side heat exchanger 1, E2, S2 ports of the second four-way valve 7, gas-liquid The suction ends of the separator 12 and the compressor 11 are successively connected.

When the second four-way valve 7 is energized and the first four-way valve 10 is not energized, the discharge end of the compressor 11 is connected to the D1 and C1 ports of the first four-way valve 10, the first one-way valve 9, and the second four-way valve. D2 and E2 ports of 7, air conditioner side heat exchanger 1, liquid reservoir 3, third one-way valve 4, throttling device 5, air side finned heat exchanger 8, C2 of the second four-way valve 7, The S2 port, the gas-liquid separator 12, and the suction end of the compressor 11 are connected in sequence.

When the first four-way valve 10 is energized and the second four-way valve 7 is not energized, the discharge end of the compressor 11 and the D1 and E1 ports of the first four-way valve 10, part of the heat recovery heat exchanger 13, and the fourth one-way Valve 6, D2 and C2 ports of the second four-way valve 7, air-side finned heat exchanger 8, throttling device 5, second one-way valve 2, air-conditioning side heat exchanger 1, second four-way valve 7 The ports E2 and S2 of the gas-liquid separator 12 and the suction end of the compressor 11 are sequentially connected.

When both the first four-way valve 10 and the second four-way valve 7 are energized, the discharge end of the compressor 11 is connected to the D1 and E1 ports of the first four-way valve 10, part of the heat recovery heat exchanger 13, and the fourth one-way valve. 6. Ports D2 and E2 of the second four-way valve 7, air-conditioning side heat exchanger 1, liquid reservoir 3, third one-way valve 4, throttling device 5, air-side finned heat exchanger 8, the second The C2 and S2 ports of the four-way valve 7, the gas-liquid separator 12, and the suction end of the compressor 11 are connected in sequence.

Specifically, the throttling device 5 is a capillary tube, a thermal expansion valve or an electronic expansion valve.

Specifically, a fan is provided on one side of the air-side finned heat exchanger 8 .

The partial heat recovery type air-cooled chiller of the utility model has four operating modes: air-conditioning cooling mode, air-conditioning heating mode, air-conditioning cooling and heat recovery mode, air-conditioning heating and domestic hot water mode.

When the air conditioner is running in cooling mode, the low-temperature and low-pressure refrigerant vapor is compressed by the compressor 11 into high-temperature and high-pressure superheated vapor, flows to the first four-way valve 10, passes through the first one-way valve 9, and then flows to the second four-way valve 7 (this At the same time, the first four-way valve 10 and the second four-way valve 7 are not energized), and then flow to the air-side finned heat exchanger 8 to exchange heat with the outdoor air. At the same time, the air-side finned heat exchanger 8 The fan is turned on, so that the refrigerant condenses into a medium-temperature and high-pressure liquid in the air-side finned heat exchanger 8, and then passes through the throttling device 5 to become a low-temperature and low-pressure liquid, and then passes through the second one-way valve 2 to enter the air-conditioning side heat exchanger. The heater 1 performs heat exchange with the air-conditioning water, and turns the air-conditioning water to the set temperature, and at the same time, the low-temperature and low-pressure liquid evaporates into a low-temperature and low-pressure gas, flows to the second four-way valve 7, and finally flows back through the gas-liquid separator 12 The compressor 11 completes the entire refrigeration cycle.

When the air conditioner is running in the heating mode, the low-temperature and low-pressure refrigerant vapor is compressed by the compressor 11 into high-temperature and high-pressure superheated vapor, flows to the first four-way valve 10, passes through the first one-way valve 9, and then flows through the second four-way valve 7 (At this time, the second four-way valve 7 is energized, and the first four-way valve 10 is not energized), and then flows to the air-conditioning side heat exchanger 1 to exchange heat with the air-conditioning water, and the refrigerant condenses in the air-conditioning side heat exchanger 1 to a medium temperature The high-pressure liquid passes through the liquid reservoir 3, the third one-way valve 4, and the throttling device 5 in turn to become a low-temperature and low-pressure liquid, and then enters the air-side finned heat exchanger 8 to exchange heat with the air. The low-pressure liquid evaporates into a low-temperature and low-pressure gas, flows to the second four-way valve 7, and finally flows back to the compressor 11 through the gas-liquid separator 12 to complete the entire heating cycle.

When the air conditioner is running in refrigeration and heat recovery mode, the low-temperature and low-pressure refrigerant vapor is compressed by the compressor 11 into high-temperature and high-pressure superheated vapor, which flows to the first four-way valve 10 (at this time, the first four-way valve 10 is energized and the second four-way valve 7 power off), and then flow to part of the heat recovery heat exchanger 13, and conduct heat exchange with the domestic water in the thermal insulation water tank 15, and heat the domestic water, and then respectively pass through the fourth one-way valve 6, the second four-way valve 7, the air The side-finned heat exchanger 8 exchanges heat with the outdoor air, and the fan of the air-side finned heat exchanger 8 is turned on, so that the refrigerant condenses into a medium-temperature and high-pressure liquid in the air-side finned heat exchanger 8. After passing through the throttling device 5, it becomes low-temperature and low-pressure liquid, passes through the second check valve 2, enters the air-conditioning side heat exchanger 1, exchanges heat with the air-conditioning water, and turns the air-conditioning water into the set temperature, while the low-temperature and low-pressure liquid The refrigerant liquid evaporates into a low-temperature and low-pressure gas, flows to the second four-way valve 7, and finally flows back to the compressor 11 through the gas-liquid separator 12 to complete the entire refrigeration and heat recovery cycle. Air conditioning cooling mode.

When the air conditioner is running in heating and domestic hot water mode, the low-temperature and low-pressure refrigerant vapor is compressed by the compressor 11 into high-temperature and high-pressure superheated vapor, and flows to the first four-way valve 10 (at this time, the first four-way valve 10 and the second four-way valve Valves 7 are all energized), and then flow to part of the heat recovery heat exchanger 13, heat exchange with the domestic water in the thermal water tank 15, and heat the domestic water, and then pass through the fourth one-way valve 6 and the second four-way valve 7 in sequence , into the heat exchanger 1 on the air-conditioning side to exchange heat with the air-conditioning water, and the refrigerant condenses into a medium-temperature and high-pressure liquid in the heat exchanger 1 on the air-conditioning side, and then passes through the liquid receiver 3, the third one-way valve 4, and the throttle in sequence. The flow device 5 becomes a low-temperature and low-pressure liquid, enters the air-side finned heat exchanger 8, and exchanges heat with the air. The separator 12 flows back to the compressor 11 to complete the entire heating and domestic hot water cycle, and when the domestic water is heated to a set temperature, this mode is pushed out and turned into an air-conditioning heating mode.

Users can choose different operating modes of the air-conditioning system according to different seasons. For example, in summer, when users have both air-conditioning needs and hot water needs, they can run the air-conditioning cooling and heat recovery operating modes. The set air-conditioning temperature and domestic hot water temperature are intelligently operated between the air-conditioning cooling mode and the air-conditioning cooling and heat recovery mode, thereby realizing energy saving. In winter, the user can adopt the automatic mode of air conditioning heating and domestic hot water, and intelligently switch between the air conditioning heating mode and domestic hot water mode through the microcomputer controller, and operate in different time periods to meet the needs of air conditioning and hot water.

Example 2

The second specific embodiment of a partial heat recovery type air-cooled chiller of the present utility model is shown in Figure 2. The main technical solution of this embodiment is the same as that of Embodiment 1, and the features not explained in this embodiment , the explanation in Embodiment 1 is adopted, and the details are not repeated here, and the components in FIG. 2 that are the same as those in FIG. 1 use the same symbols. The difference between this embodiment and Embodiment 1 is that part of the heat recovery heat exchanger 1327 is placed outside the heat preservation water tank 1528 . A hot water circulation pump 14 is additionally provided, and the water inlet of part of the heat recovery heat exchanger 13 is connected with the water outlet of the thermal insulation water tank 15 through the hot water circulation water pump 14, and the water outlet of the partial heat recovery heat exchanger 13 is connected with the water outlet of the thermal insulation water tank 15. The water inlet is connected.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art Personnel should understand that the technical solution of the utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solution of the utility model.

Claims (6)

1. but a portion of hot reclaiming type wind-cooled cold-water unit is characterized in that: include compressor, first cross valve, second cross valve, air side fins formula heat exchanger, throttling arrangement, first check valve, second check valve, the 3rd check valve, the 4th check valve, air-conditioning side heat exchanger, reservoir, gas-liquid separator, part heat recovering heat exchanger and attemperater; Described part heat recovering heat exchanger is arranged in the described attemperater;

When described first cross valve and described second cross valve all during no power, the suction side of the E2 of the D2 of the D1 of the outlet side of described compressor and described first cross valve, C1 port, described first check valve, described second cross valve, C2 port, described air side fins formula heat exchanger, described throttling arrangement, described second check valve, described air-conditioning side heat exchanger, described second cross valve, S2 port, described gas-liquid separator, described compressor joins successively;

When the energising of described second cross valve and during the described first cross valve no power, the suction side of the C2 of the D2 of the D1 of the outlet side of described compressor and described first cross valve, C1 port, described first check valve, described second cross valve, E2 port, described air-conditioning side heat exchanger, described reservoir, described the 3rd check valve, described throttling arrangement, described air side fins formula heat exchanger, described second cross valve, S2 port, described gas-liquid separator, described compressor is connected successively;

When the energising of described first cross valve and during the described second cross valve no power, the suction side of the E2 of the D2 of the D1 of the outlet side of described compressor and described first cross valve, e1 port, described part heat recovering heat exchanger, described the 4th check valve, described second cross valve, C2 port, described air side fins formula heat exchanger, described throttling arrangement, described second check valve, described air-conditioning side heat exchanger, described second cross valve, S2 port, described gas-liquid separator, described compressor joins successively;

When described first cross valve and described second cross valve were all switched on, the suction side of the C2 of the D2 of the D1 of the outlet side of described compressor and described first cross valve, e1 port, described part heat recovering heat exchanger, described the 4th check valve, described second cross valve, E2 port, described air-conditioning side heat exchanger, described reservoir, described the 3rd check valve, described throttling arrangement, described air side fins formula heat exchanger, described second cross valve, S2 port, described gas-liquid separator, described compressor was connected successively.

2. but portion of hot reclaiming type wind-cooled cold-water unit according to claim 1, it is characterized in that: described throttling arrangement is capillary, heating power expansion valve or electric expansion valve.

3. but portion of hot reclaiming type wind-cooled cold-water unit according to claim 1, it is characterized in that: a side of described air side fins formula heat exchanger is provided with blower fan.

4. but a portion of hot reclaiming type wind-cooled cold-water unit is characterized in that: include compressor, first cross valve, second cross valve, air side fins formula heat exchanger, throttling arrangement, first check valve, second check valve, the 3rd check valve, the 4th check valve, air-conditioning side heat exchanger, reservoir, gas-liquid separator, part heat recovering heat exchanger, hot-water circulating pump and attemperater; The water inlet of described part heat recovering heat exchanger is connected with the delivery port of described attemperater by described hot-water circulating pump, and the delivery port of described part heat recovering heat exchanger is connected with the water inlet of described attemperater;

When described first cross valve and described second cross valve all during no power, the suction side of the E2 of the D2 of the D1 of the outlet side of described compressor and described first cross valve, C1 port, described first check valve, described second cross valve, C2 port, described air side fins formula heat exchanger, described throttling arrangement, described second check valve, described air-conditioning side heat exchanger, described second cross valve, S2 port, described gas-liquid separator, described compressor joins successively;

When the energising of described second cross valve and during the described first cross valve no power, the suction side of the C2 of the D2 of the D1 of the outlet side of described compressor and described first cross valve, C1 port, described first check valve, described second cross valve, E2 port, described air-conditioning side heat exchanger, described reservoir, described the 3rd check valve, described throttling arrangement, described air side fins formula heat exchanger, described second cross valve, S2 port, described gas-liquid separator, described compressor is connected successively;

When the energising of described first cross valve and during the described second cross valve no power, the suction side of the E2 of the D2 of the D1 of the outlet side of described compressor and described first cross valve, e1 port, described part heat recovering heat exchanger, described the 4th check valve, described second cross valve, C2 port, described air side fins formula heat exchanger, described throttling arrangement, described second check valve, described air-conditioning side heat exchanger, described second cross valve, S2 port, described gas-liquid separator, described compressor joins successively;

When described first cross valve and described second cross valve were all switched on, the suction side of the C2 of the D2 of the D1 of the outlet side of described compressor and described first cross valve, e1 port, described part heat recovering heat exchanger, described the 4th check valve, described second cross valve, E2 port, described air-conditioning side heat exchanger, described reservoir, described the 3rd check valve, described throttling arrangement, described air side fins formula heat exchanger, described second cross valve, S2 port, described gas-liquid separator, described compressor was connected successively.

5. but portion of hot reclaiming type wind-cooled cold-water unit according to claim 4, it is characterized in that: described throttling arrangement is capillary, heating power expansion valve or electric expansion valve.

6. but portion of hot reclaiming type wind-cooled cold-water unit according to claim 4, it is characterized in that: a side of described air side fins formula heat exchanger is provided with blower fan.

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