JPH0996470A - Control device for heat pump type temperature conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a controlling means for comfortable heating in a heat pump type temperature conditioning device that controls temperature, with a system different from temperature control by the heat pump, by using a cooling water circuit that is circulated with cooling water of an engine. SOLUTION: A floor temperature sensor 32A that detects temperature is arranged on the radiator 9A, etc., of a warm water circulating circuit 10 that is connected to panels 9A and 9B for floor heating, and a room temperature sensor 33A, that detects the room temperature conditioned by the indoor temperature conditioner 4 connected to the coolant circulating circuit 5, is arranged. The controlling means for setting the operating state mainly of the floor heating based upon the floor temperature detecting signal from the floor temperature sensor 32A, and the room temperature detecting signal from the room temperature sensor 33A, in the automatic control of the indoor heating by the floor heating with the radiator 9A, etc., and by the indoor heating by the indoor temperature conditioner 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine-driven heat pump device, and more particularly, a cooling water circuit for circulating engine cooling water is used to control the temperature of a system different from that of the heat pump. In a heat pump type temperature control device, the present invention relates to a technique for determining a mutual operating state based on temperature information of both temperature control systems to achieve comfortable heating.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 2-82065 discloses a refrigerant circulation circuit in which an indoor temperature controller is connected to a circuit that circulates a refrigerant pumped from an engine-driven compressor, and a circuit that forcibly circulates engine cooling water. In a heat pump device provided with a hot water circulation circuit to which another radiator (for example, a warm floor) is connected, and a heat exchanger that transfers heat from at least the refrigerant to the hot water side by a branch circuit branched from the refrigerant circulation circuit,
A radiator valve that controls the partial circulation of hot water to the radiator in the circuit that forcedly circulates the engine cooling water, and a temperature sensor that detects the temperature of the hot water in the hot water circulation circuit are provided, and an indoor temperature controller and a radiator are provided. In the combined mode of operating at the same time, a state in which the radiator valve is controlled based on the temperature detected by the temperature sensor so that hot water is partially circulated in the radiator to be cooled and a state in which hot water is prevented from circulating to the radiator It is described that and are automatically set.

That is, during the operation in the combined mode, in the device of the above publication, the radiator valve is opened when the temperature detected by the temperature sensor is higher than a predetermined value, and the radiator valve is closed when the temperature detected is lower than the predetermined value. We are trying to use efficiently. However, such operation means that the floor temperature by the radiator and the room temperature by the indoor air conditioner are collectively controlled by relying only on the temperature of the engine cooling water,
The emphasis is on efficient use of energy, and user comfort is ignored.

[0004]

SUMMARY OF THE INVENTION In view of the problem that the above-described conventional apparatus controls only the temperature of the cooling water to perform the operation in the combined mode of floor heating and indoor heating, the present invention has been conceived. Provides a control device for a heat pump type temperature controller that performs comfortable heating by correcting the temperature control conditions of the actual room temperature and floor temperature by controlling the mutual operating states based on the temperature detected by the warm sensor The purpose is to do.

[0005]

Means for Solving the Problems The gist of the invention of claim 1 which has solved the above problems is as follows: (a) a floor temperature sensor for detecting the temperature of a radiator; and (b) detection of a room temperature by an indoor temperature controller. The room temperature sensor, and (c) is configured to output an air volume control signal to the indoor fan of the indoor temperature controller, and in automatically controlling the floor heating by the radiator and the indoor heating by the indoor temperature controller, the floor There is provided a control means for setting an operating state mainly for floor heating based on the floor temperature detection signal of the temperature sensor and the room temperature detection signal of the room temperature sensor.

According to a second aspect of the present invention, the control means determines that (a) the detected room temperature based on the room temperature detection signal is higher than a set room temperature at which the room heating is restarted, and the room heating and the floor. When heating is simultaneously operated, (b) the detected floor temperature based on the floor temperature detection signal is compared with the set floor heating minimum target value, and (c) the detected floor temperature is the set floor heating minimum target value. When it is higher, the set room temperature is slightly lowered, and (d) when the detected bed temperature is lower than the set floor heating minimum target value, the set room temperature is reset to the initial set value.

According to the third aspect of the invention, when the control means determines that (a) the detected room temperature based on the room temperature detection signal is lower than the set room temperature for restarting the indoor heating, (b) the floor temperature. The detected floor temperature based on the detection signal is compared with the set floor heating minimum target value. (C) If the detected floor temperature is higher than the set floor heating minimum target value, the detected room temperature based on the room temperature detection signal and the above setting A difference from the room temperature is calculated, and when the difference is larger than a predetermined value, the current air volume is lowered by one rank.

The detection room temperature higher than the set room temperature for restarting the indoor heating may include the case where both are equal. The case where the detected floor temperature is higher than the set floor heating minimum target value may include the case where both are equal.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is an example of a heat pump type temperature controller to which the present invention is applied, in which I and II separated by a chain line are an outdoor unit and an indoor unit, respectively. The outdoor unit I is mainly composed of an engine 1 driven by gas fuel, and a compressor 3 is connected to the engine 1 via a clutch 2. The compressor 3 compresses a refrigerant such as chlorofluorocarbon into high-temperature and high-pressure gas, which is circulated in a refrigerant circulation circuit 5 equipped with an indoor air conditioner 4. The engine cooling water is circulated by a cooling water circuit 7 equipped with a pump 6, and the cooling water circuit 7 is provided with a water / water heat exchanger 8 for controlling the temperature of a system different from the indoor air conditioning. That is, the heat exchanger 8
Is connected to a hot water circulation circuit 10 using, for example, floor heating panels 9A and 9B as radiators, and heat of engine cooling water is absorbed by the hot water circulation circuit 10.

More specifically, the refrigerant circulation circuit 5 is provided with a four-way switching valve 13 between the ends of the discharge pipe 11 and the suction pipe 12 extending from the compressor 3, and the four-way switching valve 13 is further provided. A circuit 1 including an indoor air conditioner 4, an expansion valve 14, an outdoor heat exchanger 15 and a double pipe heat exchanger 16 in 13.
7 are connected, and the refrigerant circulation circuit 5 is configured by this configuration.

The double tube heat exchanger 16 is for transferring heat from at least the engine cooling water in the cooling water circuit 7 to the refrigerant. The double tube heat exchanger 16 and the cooling water circuit 7 are They are connected by a branch circuit 18. this is,
This is intended for efficient operation by supplying heat from the cooling water circuit 7 to the refrigerant circulation circuit 5 during heating operation. However, one pipe of the branch circuit 18 is directly connected to the cooling water circuit 7, while the other pipe is connected to the cooling water circuit 7 via the temperature control valve 19. The temperature control valve 19 sends the engine cooling water to the branch circuit 18 when the engine cooling water is, for example, about 70 ° C. or more, and sends the engine cooling water to the cooling water circuit 7 when the engine cooling water is about 60 ° C. or less.

By the way, the cooling water circuit 7 is provided with a low temperature passage comprising the pump 6, the exhaust heat exchanger 20 for absorbing the exhaust heat of the engine 1, and a high temperature passage having the water / water heat exchanger 8 separately. A heat radiation passage 22 having a radiator 21 is provided so as to bypass the high temperature passage. Switching of the engine cooling water between the heat radiation passage 22 and the high temperature passage is performed by a thermostat type temperature control valve 23. That is, for example, when the temperature is 75 ° C or higher, the engine cooling water that has passed through the exhaust heat heat exchanger 20 is sent to the heat dissipation passage 22, and when the temperature is 75 ° C or lower, the engine cooling water that has passed through the exhaust heat heat exchanger 20 has a high temperature. Sending to the aisle.

Further, the water-water heat exchanger 8 of the cooling water circuit 7
Is connected to a bypass passage 24, and the upstream branch point is switched to the water / water heat exchanger 8 side at about 70 ° C or higher,
A temperature control valve 25 that switches to the bypass 24 side at a temperature of approximately 60 ° C or less is provided. Therefore, in order for the hot water circulation circuit 10 to send the heat absorbed from the engine cooling water in the water / water heat exchanger 8 to the panels 9A and 9B by the hot water as the heat medium, the hot water circulation circuit 10 includes the panel 9A. , 9B is connected between the confluence end (downstream side) of the water and the water-water heat exchanger 8 and the flow control valves 27A, 27B of controllable solenoid valves of hot water flowing into the panels 9A, 9B are provided. It is provided. The flow rate control valves 27A and 27B are for switching the floor heating area. As the warm water, for example, an aqueous solution of polypropylene glycol or the like is used, and reference numeral 28,
Reference numeral 29 is a branching device. Further, the cooling water circuit 7 is provided with a reservoir tank 30 for engine cooling water and a buffer 31 therefor.

By the way, the feature of the present embodiment is that the floor temperature sensors 32A, 3 for detecting the temperature of the panels 9A, 9B.
2B and the room temperature sensor 33 (see FIG. 2) for detecting the room temperature by the indoor temperature controller 4 are provided. The floor temperature sensors 32A and 32B detect the surface temperature of the panels 9A and 9B. Next, the engine 1, the controllable clutch 2, the blower fan 4a of the indoor temperature controller 4, the pump 26 of the hot water circulation circuit 10, the flow control valves 27A and 27B, and the pump 6 of the cooling water circuit 7 in the heat pump type temperature controller. The control means 39 for controlling is realized by the microcomputer circuit shown in FIG.

In the configuration shown in FIG. 2, the operation signal 34 from the operation unit 34 including the remote controller, which is sent to the indoor temperature controller 4, is used.
Operation including an indoor unit controller 35 which inputs the room temperature detection signal 33a from the room temperature sensor 33 and outputs an air volume control signal 35a to the blower fan 4a as an output, and a remote controller sent to the panels 9A and 9B. Part 3
Operation signal 36a from 6 and the floor temperature sensors 32A, 3
The bed temperature detection signal 32a from 2B is input, and the hot water circulation to the pump 26 of the hot water circulation circuit 10 is turned on as an output.
A floor heating controller 37 that outputs a / OFF signal 37a and a floor temperature control signal 37b to the flow rate control valves 28A and 27B of the hot water circulation circuit 10, and is interconnected to the floor heating controller 37 and the indoor unit controller 35,
The two controllers communicate with each other, and in response to the command signals 38a and 38b from the two controllers, a rotation speed control signal for the engine 1 and an ON / OFF signal for the clutch 3 for connecting and disconnecting the engine 1 and the compressor 2 and the like. And an outdoor unit controller 38 that outputs

The floor temperature detection signal 32a is a signal selected by the floor heating controller 37 from an output from a sensor that detects the surface temperature of the panel being operated.
When both 9B are in operation, the floor heating controller 37 outputs the average value of the two or the output from the sensor of the higher panel.
Select. A heating temperature control subroutine in which the control device of the heat pump type temperature control device automatically controls the indoor temperature control device 4 and the panels 9A and 9B is shown in FIG.

Indoor heating ON / O from the operation parts 34 and 36
Both FF operation signal and floor heating ON / OFF operation signal are O
When operating in the N state (indoor heating and floor heating are not necessarily in actual operation), when the heating temperature control subroutine is entered, the floor heating controller 37 first determines the floor heating temperature control condition (S ₁ ). , The detected floor temperature T _F based on the floor temperature detection signal 32a is compared with the set floor heating minimum target value T _F0 and the set floor heating maximum target value T _FS . When T _F0 ≧ T _F , when the floor heating is stopped, the floor heating operation (S ₂ ) is performed. Therefore, the floor temperature control signal 37b for opening the flow rate control valves 27A and 27B is set to each flow rate control valve. 27A and 27B, the hot water circulation ON / OFF signal 37a is turned on, and the pump 2
A hot water circulation ON signal is output to 6. Further, when T _FS ≤T _F , the floor temperature control signal 37b for closing the flow rate control valves 27A and 27B is applied to each flow rate control valve to stop the floor heating (S ₃ ) during the floor heating operation. 27A and 27B, and outputs a hot water circulation OFF signal to the pump 26.

Next, the indoor unit controller 35 judges the indoor temperature control condition (S ₄ ) and compares the detected room temperature T _A based on the room temperature detection signal 33a with the set room temperature for restarting the indoor heating. Here, the set room temperature at which the indoor heating is restarted means the initial set value T that the user instructs from the operation unit 34.
It is obtained by subtracting the correction temperature ΔT _A described below from _AS . In the case of T _AS -ΔT _A> T _A, when the stopped indoor heating, for performing indoor heating operation (S _5), and outputs the air volume control signal 35a to the blower fan 4a of the indoor temperature controller 4 , Outputs a signal for turning on the clutch 2 to the same clutch 2.

[0019] In this case, the indoor unit controller 35, T _AS
If −ΔT _A ≦ T _A , the floor heating controller 37 is communicated with, and the floor heating controller 37 is under floor heating? (S ₆ )
Is determined. When the determination in S ₆ is “during floor heating”, the floor heating controller 37 communicates with the indoor unit controller 35, and the indoor unit controller 35 is in the indoor heating operation? (S
Perform the judgment in ₇ ). At this time, when the indoor air conditioner 4 is in actual operation, the indoor unit controller 35 causes the floor heating controller 3 to operate.
7, the floor heating controller 37 communicates with the floor temperature detection signal 3
The detected floor temperature based on 2a is compared with the floor heating minimum target value T _F0 (S ₈ ). Then, the floor heating controller 37
If T _F ≧ T _F0 , start the built-in timer (S ₉ ) and continue time up? If the time is up in the determination of (S ₁₁ ), the current correction temperature ΔT _A is added by the unit amount ΔT (S ₁₂ ). If ΔT _A becomes larger than the upper limit value as a result of the addition, ΔT _A is suppressed at the upper limit value (S ₁₄ ) and the process returns. If the ΔT _A is smaller than the upper limit value, the next S ₄
It retained as comparative values in to return, if the [Delta] T _A is greater than the upper limit, suppressing the [Delta] T _A at the upper limit value (S ₁₄₎ to return. Also, the floor heating controller 37
In the determination of S ₈ , if T _F <T _F0 , the built-in timer started in S ₉ is reset, the correction amount ΔT _A is reset to zero (S ₁₀ ) and the process returns.

Thus, in this embodiment, the detection room temperature T
_{When A} is higher than the set room temperature for restarting indoor heating, the set room temperature is slightly lowered, and when the detected floor temperature is lower than the set floor heating minimum target value, the set room temperature is reset to the initial set value. , The ratio of performing indoor heating and floor heating is increased to the floor heating side to obtain comfort of heating temperature control.

When the detected room temperature T _A is higher than the set room temperature at which the room heating is restarted, and when the floor heating is stopped and the room heating is stopped, the routine directly returns. Next, the indoor unit controller 35 executes the indoor heating operation in S ₅ and then communicates with the floor heating controller 37, and the floor heating controller 37 performs the same process as in S ₈ , that is, based on the floor temperature detection signal 32a. The detected floor temperature is compared with the set floor heating minimum target value T _F0 (S ₁₅ ). Then, if T _F ≧ T _F0 , the floor heating controller 37 calculates the difference between the detected room temperature T _A and the current set room temperature T _AS −ΔT _A, and compares the difference with the predetermined value T _H (S _16). ). The predetermined value T _H is T _A
The condition may be <T _AS −ΔT _A , for example, about 0.5 °. When T _A and T _AS −ΔT _A are larger than T _H , S ₁₇ [air volume Hi? ] → S ₁₈ [Airflow Mid? ] → Return, S ₁₇ → S ₁₉ [Air flow Mid] → Return, S ₁₇ →
S ₁₈ → S ₂₀ [Air volume Lo? ] -By one of the returns, an air volume control signal for lowering the current air volume by one rank is output to the blower fan 4a.

As described above, in the present embodiment, when the detected floor temperature T _F is high during the operation of the indoor heating, the current air volume is controlled to determine the temperature control condition (air volume) in the floor heating to control the heating temperature. To get the comfort of. As another embodiment of the present invention, since the branch circuit 18 improves the efficiency of indoor heating, the branch circuit 18 is not necessarily limited to the heat pump type temperature controller having the branch circuit 18.

The control means 39 is not limited to a system in which each controller has a judgment function as in the configuration of FIG. 2, but one controller may control floor heating, room heating, engine and the like. Absent. Furthermore, although the heat pump type temperature controller of the present embodiment is a compression type,
Since the gist of the present invention is to control each actuator of the temperature controller based on the room temperature and the floor temperature, the temperature controller is not limited to the compression type.

[0024]

As described above, according to the present invention, by setting temperature control conditions mainly for floor heating based on the actual floor temperature and room temperature, comfortable heating with excellent floor heating performance is achieved. It can be performed. Particularly, according to the invention of claim 2, when the floor temperature is higher than the set room temperature for restarting the indoor heating, the set room temperature is corrected so as to become lower, and when the floor temperature is lower than the set floor heating minimum target value, the above is performed. By resetting the set room temperature to the initial set value, the ratio of performing indoor heating and floor heating can be increased to the floor heating side, and comfortable heating can be performed.

Particularly, according to the third aspect of the present invention, during the operation of the indoor heating, when the detected floor temperature is high, the current air flow rate is reduced, so that the comfortable heating can be performed.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an example of a heat pump type temperature controller to which the present invention is applied.

FIG. 2 is a block diagram showing an example of control means for controlling the temperature controller.

FIG. 3 is a flowchart of a control operation performed by the control means.

[Explanation of symbols]

1 is an engine, 2 is a clutch, 3 is a compressor, 4 is an indoor air conditioner, 5 is a refrigerant circulation circuit, 7 is a cooling water circuit, 10 is a hot water circulation circuit, 9A and 9B are panels, 32A and 32B are floor temperature sensors. , 33 are room temperature sensors.

Front Page Continuation (72) Inventor Haruo Hisaki, 4-1-2 Hirano-cho, Chuo-ku, Osaka, Osaka Gas Co., Ltd. (72) Yoshitaka Shibata 4-1-2, Hirano-cho, Chuo-ku, Osaka Osaka Gas Co., Ltd. In the company

Claims (3)

[Claims] 1. A refrigerant circulation circuit in which an indoor temperature controller is connected to a circuit that circulates a refrigerant that is pumped from an engine-driven compressor, a cooling water circuit that circulates engine cooling water, and heat absorption from the cooling water circuit. In a heat pump type temperature controller having a hot water circulation circuit in which a radiator for floor heating is connected to the circuit to perform, a floor temperature sensor for detecting the temperature of the radiator and a room temperature for detecting room temperature by the indoor temperature controller. The floor of the floor temperature sensor is configured to output an air volume control signal to the indoor fan of the indoor temperature controller and to automatically control the floor heating by the radiator and the indoor heating by the indoor temperature controller. A control device for a heat pump type temperature controller, comprising: a control unit that sets an operating state mainly for floor heating based on a temperature detection signal and a room temperature detection signal from a room temperature sensor. 2. The control means determines that the detected room temperature based on the room temperature detection signal is higher than a set room temperature for restarting the room heating, and the room heating and the floor heating are simultaneously operated, The detected floor temperature based on the floor temperature detection signal and the set floor heating minimum target value are compared, and when the detected floor temperature is higher than the set floor heating minimum target value, the set room temperature is slightly lowered, and the detected floor temperature is The controller for a heat pump type temperature controller according to claim 1, wherein the set room temperature is reset to an initial set value when it is lower than a set floor heating minimum target value. 3. When the control means determines that the detected room temperature based on the room temperature detection signal is lower than the set room temperature for restarting indoor heating, the detected floor temperature based on the floor temperature detection signal and the set floor heating minimum target. If the detected floor temperature is higher than the set floor heating minimum target value, the difference between the detected room temperature based on the room temperature detection signal and the set room temperature is calculated and the difference is larger than a predetermined value. 2. The control device for the heat pump type temperature controller according to claim 1, wherein the air volume control signal is output to lower the current air volume by one rank.